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Line Differential Protection

1. L1 L2 L3 he PWM Pilot wire monitoring I gt gt 0 0 Or diff i Summation l trip current transformer 66 Lockout I gt t l gt 4 3 L Pilot wire g monitoring 7SJ600 Bair af 7SD60 pilot wires I gt gt 0 r M Pilot wire q 0 49 monitoring f Summation 2 Fig 7 7 k S E transformer 3 g l Remote na Protection configuration with Jan trip 8 main 7SD60 and backup 3 overcurrent 7SJ60 protection 7SJ600 7SD60 Fig 7 8 Typical circuit for auxiliary voltage supply Lockout Reset L Block diff prot LSA2364 agpen eps 7 8 siemens LEM ENS siemens russia com Technical data General unit data Input circuits Rated current Jy Rated frequency fw Thermal overload capability current path Continuous For 10 s For 1s Auxiliary voltage Auxiliary voltage via integrated DC DC converter Rated auxiliary DC voltage permissible variations Superimposed AC voltage Vaux Peak to peak Power consumption Quiescent Energized Bridging time during failure short circuit of auxiliary voltage Rated auxiliary voltage AC Vaux permissible variations Command contacts Number of relays Contacts per relay Switching capacity Make Break Switching voltage Permissible current Continuo
2. Circuit breaker peed Cape D 2 a k c v LO S E Del d Voltage inputs optional Fig 7 71 Example of connection for current and voltage transformers Lg L2 L3 P1 P2 S1 Lo 52 a a S 52 7 Circuit breaker Af Fig 7 72 Alternative connection of current transformers for sensitive ground earth current measuring with core balance current transformers 7 60 siemens IEM ENS slemens russia com Typical connection Alternative current connection 3 phase current transformers with neutral point in the line direction I4 connected to a current transformer in the neutral point of a grounded earthed transformer for directional ground earth fault protection The voltage connection is effected in ac cordance with Fig 7 71 7 76 or 7 77 Alternative current connection 3 phase current transformers with neutral point in the line direction I4 connected to the summation current of the parallel line for parallel line compensation on overhead lines The voltage connection is effected in accordance with Fig 7 71 7 76 or 7 77 7 Line Differential Protection 7SD52 53 LSA4753en eps Circuit breaker 1 Fig 7 73 Alternative connection of current transformers for measuring neutral current o
3. lan CT rated primary current A Ve E oll Cc of G f 2 2 Z S L CE conformity This product is in conformity with the Directives of the European Commu nities on the harmonization of the laws of the Member States relating to electromagnetic compatibility EMC Council Directive 89 336 EEC and electrical equipment designed for use within certain voltage limits Council Directive 73 23 EEC This unit conforms to the international standard IEC 60255 and the Ger man standard DIN 57435 Part 303 corresponding to VDE 0435 Part 303 Further applicable standards ANSI IEEE C37 90 0 and C37 90 1 This conformity is the result of a test that was performed by Siemens AG in accordance with Article 10 of the Council Directive complying with the generic standards EN 50081 2 and EN 50082 2 for the EMC Directive and standard EN 60255 6 for the low voltage Directive Siemens BT E M E N S siemens russia com Selection and ordering data Accessories 7 Line Differential Protection 7SD60 Description 7SD60 numerical pilot wire current comparison protection relay Order No 7SD600L1 LO OAO 0 0 DAO Rated current rated frequency 20 mA 50 60 Hz without external summation current transformer AAA AoA 0 1 A 50 60 Hz with external summation CT 44M4930 7DB00 0AN2 1 5 A 50 60 Hz with external summation CT 4AM4930 6DB00 0OAN2 5 Rated auxiliary voltage 24
4. 7 Line Differential Protection 7SD52 53 Reverse LSA2505 agpen eps Fig 7 51 Distance protection quadrilateral characteristic Z3 if reverse Parallel line compensation The influence of wrong distance measure ment due to parallel lines can be compen sated by feeding the neutral current of the parallel line to the relay Parallel line com pensation can be used for distance protec tion as well as for fault locating 7 distance zones 6 independent distance zones and one se parate overreach zone are available Each distance zone has dedicated time stages partly separate for single phase or multi phase faults Ground earth faults are de tected by monitoring the neutral current 3Ip and the zero sequence voltage 3Vo The quadrilateral tripping characteristic per mits separate setting of the reactance X and the resistance R The resistance section R can S Z Fig 7 52 N Distance protection 3 mho characteristic be set separately for faults with and with out earth involvement This characteristic has therefore an optimal performance in case of faults with fault resistance The dis tance zones can be set forward reverse or non directional Sound phase polarization and voltage memory provides a dynami cally unlimited directional sensitivity Mho The mho tripping characteristic provides sound phase respectively memory polariza tion for all dist
5. Selection and ordering data Description Order No Short code 7SD5 combined multi end line differential protection 7SD5O0O0O OOOOO OO0OO0 000 with distance protection continued Functions Time overcurrent protection Breaker failure protection ANSI 50 50N 51 51N 50BF Earth fault protection ANSI 67N Distance protection Pickup Z lt polygon MHO parallel line comp Power Swing detection ANSI 21 21N 68 68T Distance protection pickup I gt VI p Z lt polygon parallel line comp power swing det ANSI 21 21N 68 68T Earth fault detection for isolated compensated networks AAA with without without without without with without without with without D with without with without without 3 with with without without without F with with without with without G with with with without without H with without without without with Yi with without without with with K with with without without with with with without with with M Additional functions 1 4 Remote commands 24 Remote indications Transformer expansions Fault locator Voltage protection frequence protection ANSI 27 50 Restricted earth fault low impedance ANSI 87N with without _1 side measuring without without d with without 1 side measuring with without K with without 2 side measuring without without L with without 2 side measuring
6. A voltage rise can occur on long lines that are operating at no load or are only lightly loaded The 7SD610 contains a number of overvoltage measuring elements Each mea suring element is of two stage design The following measuring elements are available e Phase to earth overvoltage s Phase to phase overvoltage e Zero sequence overvoltage The zero sequence voltage can be con nected to the 4 voltage input or be de rived from the phase voltages Positive sequence overvoltage of the local end or calculated for the remote end of the line compounding e Negative sequence overvoltage Tripping by the overvoltage measuring ele ments can be effected either at the local cir cuit breaker or at the remote station by means of a transmitted signal The 7SD610 is fitted in addition with three two stage undervoltage measuring elements e Phase to earth undervoltage e Phase to phase undervoltage e Positive sequence undervoltage The undervoltage measuring elements can be blocked by means of a minimum current criterion and by means of binary inputs 7 Line Differential Protection 7SD61 Frequency protection ANSI 810 U Frequency protection can be used for over frequency and underfrequency protection Unwanted frequency changes in the net work can be detected and the load can be removed at a specified frequency setting Frequency protection can be used over a wide frequency range 45 to 55 55 to 65 H
7. o nication LSA4748en eps device ST connectors on X21 64 128 512 kbit s or both sides G703 64 kbit s Fig 7 27 Connection to a communication network CC XG G Communication rter max 1 5 km for 62 5 125 um SYS multi mode FO 820 nm 7XV5662 0AD00 J e Interface Link to commu d o nication LSA4743en eps device ST connectors on G703 E1 2 048 kbit s or both sides G703 T1 1 544 kbit s Fig 7 28 Connection to a communication network CC 2M max 1 5 km with 62 5 um 125 um multi mode fiber IEEE C37 94 T FO30 with ST connectors H SIPV6 011en eps Fig 7 29 Connection to a communication network via IEEE C37 94 O Communi cation converter ilot max 1 5 km for 62 5 125 um Epi multi mode FO 820 nm wires 7XV5662 0AC00 D Pilot wire up to 15 km 5 LSA4749en eps Fig 7 30 Connection to a pilot wire 7 30 Siemens Bet E M E N S siemens russia com Typical connection Connection to current and voltage transformers A typical connection is to the phase CT The residual current at the Iz input is formed by summation of the phase currents This en sures optimum supervision functions for the current Optionally voltages are measured by means of voltage transformers and are fed to the unit as a phase to earth voltage The zero voltage is derived from the summation volt age by calculation performed in the unit As a matter of
8. Thermal overload protection ANSI 49 A built in overload protection with a cur rent and thermal alarm stage is provided for the thermal protection of cables and transformers The trip time characteristics are exponential functions according to IEC 60255 8 The preload is thus consid ered in the trip times for overloads An adjustable alarm stage can initiate an alarm before tripping is initiated Monitoring and supervision functions The 7SD52 53 relay provides comprehen sive monitoring functions covering both hardware and software Furthermore the measured values are continuously checked for plausibility Therefore the current and voltage transformers are also included in this monitoring system Current transformer Monitoring functions A broken wire between the CTs and relay inputs under load may lead to malopera tion of a differential relay if the load cur rent exceeds the differential setpoint The 7SD52 53 provides fast broken wire super vision which immediatelly blocks all line ends if a broken wire condition is mea sured by a local relay This avoids mal operation due to broken wire condition Only the phase where the broken wire is detected is blocked The other phases remain under differential operation Fuse failure monitoring If any measured voltage is not present due to short circuit or open circuit in the volt age transformer secondary circuit the dis tance protection would respond with an unwanted
9. VL2ER 99 97 120 5 IL3R 100 16 59 5 VL3ER 99 99 120 0 Constellation Data IdiffL1 0 00 Frequency 50 00 Hz IdiffL2 0 00 IdiffL3 0 00 S emote h fi 1 E 2000 2004 Semers AG PTD PA M rights reserved O inem Fig 7 16 Browser aided commissioning Phasor diagram la x Date Goxwbeten ansicht Everton Extras 2 Gang O x 2 e en See reverten meden TI SM A Adreson TRT 2 E wales a Links Differential Protection Tripping Characteristics Differential Parameter IDIFF gt 30 00 Adaptive Stabilization of IN 50 100 150 idiffl1 0 00 IstabLi 61 52 idiffl2 0 00 IstabL2 61 52 IdiffL3 0 00 IstabL3 61 52 B 2000 2004 Samers AG PTD PA Al rights reserved Fig 7 17 Browser aided commissioning Differential protection tripping characteristic Stability can be checked by using the operat ing characteristic as well as the calculated differential and restraint values in the browser windows O nem Event log and trip log messages are also available Remote control can be used if the local front panel cannot be accessed Siemens SIP Edition No 6 E siemens russia com LSP2845 tif LSP2846 tif 7 Line Differential Protection 7SD61 Functions E Control and automation functions Control In addition to the protection functions the SIPROTEC 4 units also support all control and monitoring functions that are required for operating med
10. Without DIGSI interface on rear DIGSI 4 electric RS232 DIGSI 4 electric RS485 DIGSI 4 optical 820 nm ST plug wINj o Protection data interface 1 FO5 Optical 820 nm 2 ST plugs line length up to 1 5 km via multimode FO cable for communication converter or direct FO connection 7 FO6 Optical 820 nm 2 ST plugs line length up to 3 5 km via multimode FO cable for direct FO connection FO17 Optical 1300 nm LC Duplex plugs line length up to 24 km via monomode FO cable for direct FO connection FO18 Optical 1300 nm LC Duplex plugs line length up to 60 km via monomode FO cable for direct FO connection S FO19 Optical 1550 nm LC Duplex plugs line length up to 100 km via monomode FO cable for direct FO connection FO30 Optical 820 nm 2 ST plugs line length up to 1 5 km via multimode FO cable for communication networks with IEEE C37 94 interface or direct FO connection 7 Not possible for surface mounting housing Order No pos 9 E G H Q R For the surface mounted version please order a device with the appropriate electrical RS485 interface and an external FO converter 2 Not possible for surface mounting housing Order No pos 9 E G H Q R please order the relay with electrical interface and Communication converter 7XV5662 see Accessories Device for surface mounting housing Order No pos 9 E G H Q R will be delivered with external repeater 7XV5461 0Bx00 F
11. e Frequency f s Differential and restraint current per phase e Availability of the data connection to the remote line ends per minute and per hour s Regarding delay time measuring with the GPS version the absolute time for trans mit and receive path is displayed sepa rately Limit value monitoring Limit values are monitored by means of the CFC Commands can be derived from these limit value indications 7 24 Siemens BT E M E N S siemens russia com Every two seconds the currents and voltages are freezed at the same time at all line ends and transmitted via the communication link At a local line end currents and volt ages are thus available with their amount and phases angle locally and remotely This allows checking the whole configura tion under load conditions In addition the differential and restraint currents are also displayed Important communication mea surements such as delay time or faulty tele grams per minute hour are also available as measurements These measured values can be processed with the help of the CFC logic editor Special attention has been paid to commis sioning All binary inputs and outputs can be displayed and activated directly This can simplify the wiring check significantly for the user The operational and fault events and the fault records are clearly arranged Furthermore all currents and optional volt ages and phases are available via communi cation link at the l
12. 115 V AC trigger level binary input 176 V 6 Binary Signal Fast High Speed Housing Flush Flush Surface indication command relays 5 trip outputs width mounting mounting mounting inputs outputs incl referred housing housing housing one live to 19 screw type plug in screw type contact terminals terminals terminals 8 4 12 S 1 2 a A 8 4 12 1 2 8 E 8 4 17 1 2 a J 16 12 12 1 1 a 16 12 12 1 1 a G 16 12 17 1 1 S L 16 4 15 5 1 1 L N 16 4 15 5 1 1 a Q 16 4 15 5 1 1 E 24 20 12 1 1 L D 24 20 12 1 1 a H 24 20 12 1 1 L M 24 12 15 5 1 1 a P 24 12 15 5 1 1 a R 24 12 15 5 1 1 a T 24 4 18 10 1 1 a WwW Region specific default language settings and funtion versions Region GE German language can be changed A Region world English language can be changed B Region US US English language can be changed C Region world French language can be changed D Region world Spanish language can be changed E Region world Italian language can be changed F 1 Redundant prot data interface for Hot Standby service is possible with a two terminal differential relay second prot data interface is needed 2 Rated current 1 5 A can be selected by the means of jumpers 3 Transition between three auxiliary voltage ranges can be selected by means of jumpers 4 The binary input thresholds are selectable in three stepy by means of jumpers 5 Fast relays are indentified in the terminal diagram The time advan
13. 2 channel opt 1550 nm mono mode FO cable LC Duplex connector 100 km 7XV5461 OBGOO 7XV5461 OBHOO 7XV5461 0BJ00 Time synchronizing unit with GPS output GPS 1 sec pulse and time telegram IRIG B DCF 77 7XV5664 0AA00 Isolation transformer 20 kV for pilot wire communication 7XR9516 Voltage transformer miniature circuit breaker Rated current 1 6 A thermal overload release 1 6 A overcurrent trip 6 A 3RV1611 1AG14 7 76 Siemens sl E M E N S siemens russia com Accessories LSP2089 afpen tif Fig 7 78 Mounting rail for 19 rack LSP2090 afpen eps LSP2091 afpen eps Fig 7 79 2 pin connector Fig 7 80 3 pin connector 5 3 a 5 a 9 eg 5 3 Fig 7 81 Fig 7 82 Short circuit link Short circuit link for current for voltage contacts contacts indications contacts 7 Line Differential Protection 7SD52 53 Description Order No DIGSI 4 Software for configuration and operation of Siemens protection units running under MS Windows Windows 2000 or XP Professional device templates Comtrade Viewer electronic manual included as well as Getting started manual on paper connecting cables copper Basis Full version with license for 10 computers on CD ROM authorization by serial number 7XS5400 0AA00 Professional DIGSI 4 Basis and additionally SIGRA fault record analysis CFC Editor logic editor Display Editor editor for default and co
14. 3 pin C73334 A1 C36 1 Siemens 7 37 Crimp CI2 0 5 to 1 mm 0 827039 1 4000 AMP connector 0 827396 1 1 AMP CI2 1 to 2 5 mm 0 827040 1 4000 AMP 0 827397 1 AMP Type III 0 75 to 1 5mm 0 163083 7 4000 AMP 0 163084 2 AMP Crimping For Type I 0 539635 1 1 AMP tool and matching female 0 539668 2 AMP For CI2 0 734372 1 1 AMP and matching female 1 734387 1 AMP 19 mounting rail C73165 A63 D200 1 1 Siemens 7 35 Short circuit links For current terminals C73334 A1 C33 1 1 Siemens 7 38 For other terminals C73334 A1 C34 1 1 Siemens 7 139 Safety cover for Large C73334 A1 C31 1 1 Siemens terminals Small C73334 A1 C32 1 1 Siemens 1 Your local Siemens representative can inform you on local suppliers Siemens SIP Edition No 6 SIEMENS slemens russla com 7 Line Differential Protection 7SD61 Connection diagram Surface mounting housing Flush mounting housing 7 7 7 l l Q1 7SD610 BI y F5 37 sa HA F6 36 Q3 gt F7 35 04 BI3 L 05 x Bl4 L I F8 1 34 Q6 Bis LT F9
15. Imi Intine Delay time Remote trip Note Setting ranges Prolongation time for transmission to remote station Delay time for reception from the remote station Prolongation time for reception from the remote station Tolerances Delay time release delay Inherent delay Transmission time without delay Lockout function Lockout seal in of trip command Lockout reset Additional functions Operational measured values Operational currents Measurement range Tolerance I Fault event recording Time tagging Resolution for operational events for fault events Fault recording max 8 faults Storage time from response or trip command Maximum length per recording Tmax Pre trigger time Tpre Post fault time Tpost Time resolution at 50 Hz Time resolution at 60 Hz Circuit breaker test 2000 Hz pulse code modulation 1 to 60 s step 1 s Approx 65 ms 0 to 5 s step 0 01 s 0 1 to 15 step 0 1 0 0 to 60 s step 0 01 s Tripping of the remote end circuit breaker for units with pilot wire monitoring only 0 to 60 s step 0 01 s 0 to 60 s step 0 01 s 0 to 60 s step 0 01 s 1 and 10 ms respectively Approx 80 ms For differential protection and remote trip until reset By means of binary input and or local operator panel DIGSI h b Init Trestraint 0 to 240 In 3 of rated value or of measured value Storage of the events relating to the last 8 faults ls 1 ms Total of 5
16. Number of breaking operations per CB pole Sum of breaking current per phase Breaking current of last trip operations 7 Max breaking current per phase TRIP CLOSE cycle 3 phases TRIP CLOSE cycle per phase 0 to 30 s steps 0 01 s Operational measured values CB test status display of binary indication in puts setting of output relays genera tion of indications for testing serial interfaces commissioning support via Web browser test mode commis sioning mode This product is in conformity with the Directives of the European Commu nities on the harmonization of the laws of the Member States relating to electromagnetic compatibility EMC Council Directive 89 336 EEC and electrical equipment designed for use within certain voltage limits Council Directive 73 23 EEC This unit conforms to the international standard IEC 60255 and the Ger man standard DIN 57435 Part 303 corresponding to VDE 0435 Part 303 Further applicable standards ANSI IEEE C37 90 0 and C37 90 1 The unit has been developed and manufactured for application in an industrial environment according to the EMC standards This conformity is the result of a test that was performed by Siemens AG in accordance with Article 10 of the Council Directive complying with the generic standards EN 50081 2 and EN 50082 2 for the EMC Directive and standard EN 60255 6 for the low voltage Directive SIEMENS siemens russia com 7 Line Differential P
17. class II Fast transients bursts IEC 60255 22 4 and IEC 61000 4 4 class IV High energy surge voltages SURGE IEC 61000 4 5 installation class III Auxiliary supply Measurement inputs binary inputs binary output relays Line conducted HF amplitude modulated IEC 61000 4 6 class III Magnetic field with power frequency IEC 61000 4 8 class IV TEC 60255 6 Oscillatory surge withstand capability ANSI TEEE C37 90 1 Fast transient surge withstand capability ANSI TEEE C37 90 1 Radiated electromagnetic interfer ence ANSI TEEE C37 90 2 Damped oscillation TEC 60694 IEC 61000 4 12 10 V m 900 MHz repetition frequency 200 Hz duty cycle 50 4 kV 5 50 ns 5 kHz burst length 15 ms repetition rate 300 ms both polarities Ri 50 Q test duration 1 min Impulse 1 2 50 us Common longitudinal mode 2 kV 12 Q 9 uF Differential transversal mode 1 kV 2 Q 18 uF Common longitudinal mode 2 kV 42 Q 0 5 uF Differential transversal mode 1 kV 42 Q 0 5 uF 10 V 150 kHz to 80 MHz 80 AM 1 kHz 30 A m continuous 300 A m for 3 s 50 Hz 0 5 mT 50 Hz 2 5 to 3 kV peak 1 to 1 5 MHz damped wave 50 surges per second duration 2 s Rj 150 to 200 Q 4 to 5 kV 10 150 ns 50 impulses per second both polarities duration 2 s R 802 35 V m 25 to 1000 MHz 2 5 kV peak value polarity alternat ing 100 kHz 1 MHz 10 and 50 MHz Ri 200 Q EMC tests for interference
18. gt 0 1 Siemens BT E M E N S siemens russia com Reactance per unit length Tolerance Technical data Voltage protection ANSI 59 27 7 Line Differential Protection 7SD52 53 Breaker failure protection ANSI 50BF Operating modes Overvoltage protection Pickup values VpH Gnd gt gt VPH Gnd gt phase ground earth overvoltage Pickup values VpH pH gt gt VPH PH gt phase phase overvoltage Pickup values 3Vo gt gt 3 Vo gt 3Vo can be measured via V4 trans formers or calculated by the relay zero sequence overvoltage Pickup values Vi gt gt Vi gt positive sequence overvoltage Measured voltage Pickup values V2 gt gt V2 gt negative sequence overvoltage Reset ratio settable Undervoltage protection Pickup values VpH Gnd lt lt VPH Gnd lt phase ground earth undervoltage Pickup values VpH PH lt lt VPH PH lt phase phase undervoltage Pickup values Vi lt lt Vi lt positive sequence undervoltage Blocking of undervoltage protection stages Reset ratio Time delays Time delay for all over and undervoltage stages Command pickup time Tolerances Voltage limit values Time stages Frequency protection ANSI 81 Number of frequency elements Setting range Delay times Operating voltage range Pickup times Dropout times Hysteresis Dropout condition Tolerances Frequency Delay times Siemens SIP Edition No 6 Local tripping or only
19. positions of each line end are depicted It is possible to check the correct connection of the current transformers or the correct vector group of a transformer 21D Date Bearbeters bdr Eavorten Extras 2 Qos O x 2 l O sen Paata an TI 9 Lw 4 Adkogse aT z EJ wedh a Links Remote Measurement Currents Voltages L I l p u apt p u 90 Local Address 1 oe iLa 99 67 0 0 VLIEL 10003 05 me LE 99 89 120 0 VL2EL 100 05 120 6 IL3L 99 84 120 5 VL3EL 100 07 120 0 Remote Address 2 ILIR 100 06 180 0 VLIER 9997 05 IL2R 99 94 60 0 VL2ER 99 97 120 5 IL3R 100 16 59 5 VL3ER 99 120 0 Constellation Data IdiffL1 0 00 Frequency 50 00 Hz IdiffL2 0 00 IdiffL3 0 00 S emote h nent D S amp S 2000 2004 Semere AG PTO PA All rights reserved O liem a Fig 7 56 Browser aided commissioning Phasor diagram BSE Data Bearbeiten ansicht Everton Extras 2 Qua O x 2 o en fepe meae n N A Adressa hitpsi 141 142 255 150 EJ wele a binds Differential Protection Tripping Characteristics Differential Parameter IDIFF gt 30 00 of IN Adaptive Stabilization of IN 50 100 150 Idiffl1 0 00 IstabLi 61 52 IdiffL2 0 00 IstabL2 61 52 e IdiffL3 0 00 IstabL3 61 52 z Z Lr aee X ZI 2000 2004 Semer AG PTD PA M ripis reserved MO Internet l Fig 7 57 Browser aided
20. setting value IREF gt approx Dropout time in ms approx Dropout ratio approx 50 Hz 60 Hz 35 30 33 29 26 23 0 7 Overcurrent time protection for phase and residual currents Multiple availability Characteristics Definite time stages DT Inverse time stages IT Acc to IEC Acc to ANSI Reset characteristics IT Current stages High current stages Iph gt gt Tiph gt gt 3ln gt gt T310 gt gt Definite time stages Jpn gt TiPh 3l gt T310 gt 3 times option Iph gt gt 310 gt gt Iph gt 310 gt Tp 310p Inverse very inverse extremely inverse long time inverse Inverse moderately inverse very inverse extremely inverse definite inverse short inverse long inverse Alternatively user specified trip and reset characteristics Acc to ANSI with disk emulation 0 10 to 35 00 A steps 0 01 A or deactivated stage ineffective 0 00 to 60 00 s steps 0 01 s or deactivated no trip 0 05 to 35 00 A steps 0 01 A or deactivated stage ineffective 0 00 to 60 00 s steps 0 01 s or deactivated no trip 0 10 to 35 00 A steps 0 01 A or deactivated stage ineffective 0 00 to 60 00 s steps 0 01 s or deactivated no trip 0 05 to 35 00 A steps 0 01 A or deactivated stage ineffective 0 00 to 60 00 s steps 0 01 s or deactivated no trip Siemens BT E M E N S siemens russia com Technical data Inverse time stages Ip Acc to IEC Ti
21. 1 Siemens small C73334 A1 C32 1 1 Siemens 1 Your local Siemens representative can inform you on local suppliers Siemens SIP Edition No 6 SIEMENS siemens russia com 7 Line Differential Protection 7SD52 53 Connection diagram Surface mounting housing Ron oo housing l l l f g f g BOQ S BO10 Fast BO1 Fast BO2 BOI Fast BO3 B012 F ast BO4 KIO sy i_2 Fast BOD B013 X41 Oo O 20 R15 gt a 95 l 3 Va Fast BOD C 45 R16 BO14 62 E O Gh 19 R17 Fast BO7 o vV _ 3 E S Bos BO15 3 2 1 x 1 5 6 6 L 44 R18 Bog LSA4468 eps 3 V3 B010 Fig 7 85 Bo11 Additional setting by jumpers 21 R13 T 3 S G Separation of common circuit of 46 R14 4 B012 BO8 to BO12 with jumpers X80 X81 X82 Switching of BO14 BO15 as NO 43 K177 7 BI B013 contact or NC
22. 15 A 1a 0 5 to 75 A say step 0 01 A or deactivated 1 to 25 A 1a 5 to 125 A 5 step 0 01 A or deactivated Approx 0 95 lt 3 of set value or 1 of In Directional ground earth fault overcurrent protection for high resistance faults in systems with earthed star point ANSI 50N 51N 67N Characteristic Phase selector Inrush restraint Instantaneous trip after switch onto fault Influence of harmonics Stages 1 and 2 gt gt gt and I gt gt Stages 3 and 4 I gt and inverse qh stage 3 definite time stages 1 inverse time stage or 4 definite time stages or 3 definite time stages 1 Voinvers stage Permits 1 pole tripping for single phase faults or 3 pole tripping for multi phase faults Selectable for every stage Selectable for every stage d lt c 3 and higher harmonics are com pletely suppressed by digital filtering 2 4 and higher harmonics are com pletely suppressed by digital filtering SIEMENS siemens russia com 7 Line Differential Protection 7SD52 53 Technical data Definite time stage ANSI 50N Pickup value 3 o gt gt gt Pickup value 3 o gt gt Pickup value 3 o gt Pickup value 3 4 stage Time delay for definite time stages Tolerances Current pickup Delay times Command pickup times 3 9 gt gt gt and 31 gt gt Command pickup times 3 o gt and 31 An stage Inverse time stage ANSI 51N Ground earth current pickup 3
23. 5 fixed invariable TN Line Jnn lh h TRestraint l t Izl I current at local relay end of line current flowing into the line is positive I current at remote relay current flowing into the line is positive Ty Line rated current of the line Fig 7 4 Trip characteristic of differential protection Trip characteristic of the differential protection relay The main function of the unit is current comparison protection The trip character istic is fixed and takes into account both the linear and the non linear errors of the cur rent transformers It is only necessary to set the tripping value lnn although the stan dard setting is suitable for most applica tions It should be parameterized according to the rated current of the line sensitive setting is possible even when the current transformer rated currents and the line rated currents differ by as much as a factor of 2 Differences in the current transforma tion ratios at the ends of the line must however be compensated for by means of external matching current transformers In some cases this can be realized by the summation current transformer Siemens SIP Edition No 6 SIEMENS siemens russia com 7 Line Differential Protection 7SD60 Protection functions Overcurrent release differential current monitoring The differential protection function can be combined with an additional overcurrent release To this end the criteria ov
24. 60 Hz Auxiliary voltage and binary 3 5 kV DC inputs 100 test RS485 RS232 rear side communi cation interfaces and time synchronization interface 100 test 500 V r m s 50 60 Hz Impulse voltage test type test All circuits except for communi cation interfaces and time syn chronization interface class III 5 kV peak 1 2 50 us 0 5 J 3 positive and 3 negative impulses at intervals of 5 s EMC tests for noise immunity type tests Standards IEC 60255 6 IEC 60255 22 product standards type tests EN 50082 2 generic standard DIN 57435 part 303 High frequency test 2 5 kV peak 1 MHz t 15 ms IEC 60255 22 1 class III and 400 surges per s test duration 2 s 8 kV contact discharge 15 kV air dis charge both polarities 150 pF Ri 3309 10 V m 27 to 500 MHz VDE 0435 part 303 class II Electrostatic discharge IEC 60255 22 2 class IV EN 61000 4 2 class IV Irradiation with RF field non modulated IEC 60255 22 3 report class II Irradiation with RF field amplitude modulated IEC 61000 4 3 class III 10 V m 80 to 1000 MHz 80 AM 1 kHz 1 For flush mounting housing 2 For surface mounting housing 3 For surface mounting housing the internal FO module OMA1 will be delivered together with an external repeater siemens russia com 7 Line Differential Protection 7SD61 Technical data Irradiation with RF field pulse modulated IEC 61000 4 3 ENV 50204
25. Approx 0 30 VA Approx 0 10 VA 500 A for 1s 150 A for 10 s 4 x In continuous 230 V continuous per phase 1250 A half cycle 24 to 48 V DC 60 to 125 V DC 110 to 250 V DC and 115 V AC with 50 60 Hz 20 to 20 lt 15 Approx 8 W Approx 18 W Z 50 ms 8 or 16 or 24 19 or 88 or 176 V DC bipolar 3 operating ranges 300 V DC Approx 1 8 mA 16 or 24 or 32 1000 W VA 30 VA 40 W 25 VA 250 V 30 A for 0 5 s 5 A continuous 1 Ranges are settable by means of jumpers Siemens SIP Edition No 6 7 Line Differential Protection 7SD52 53 LEDs RUN green ERROR red Indication red function can be assigned Unit design Housing 7XP20 1 2 x 19 or 1 1 x 19 Degree of protection acc to EN 60529 Surface mounting housing Flush mounting housing Rear Front For the terminals Weight Flush mounting housing 1 2x 19 W o Surface mounting housing 1 2 x19 1 1 x19 Serial interfaces front of unit Operating interface 1 for DIGSI 4 or browser Connection Baud rate Time synchronization rear of unit Quantity 1 1 14 See dimension drawings part 15 IPS IP 50 IPSI IP 2x with cover cap 6kg 10 kg 11 kg 19 kg Front panel non isolated RS232 9 pin subminiature connector 4800 to 115200 baud IRIG B DCF77 SCADA or 1 sec pulse from GPS format IRIG B000 Connection Voltage levels Dielectric test 9 pin subminia
26. Communications Siemens SIP Edition No 6 Ss I E MI E N S siemens russia com 7 Line Differential Protection 7SD52 53 Communication System solutions for protection and station control Together with the SICAM power automa tion system SIPROTEC 4 can be used with PROFIBUS FMS Over the low cost elec trical RS485 bus or interference free via the optical double ring the units exchange information with the control system Units featuring IEC 60870 5 103 interfaces can be connected to SICAM in parallel via the RS485 bus or radially by fiber optic link Through this interface the system is open for the connection of units of other manufacturers see Fig 7 58 Because of the standardized interfaces SIPROTEC units can also be integrated into systems of other manufacturers or in SIMATIC Electrical RS485 or optical in terfaces are available The optimum physi cal data transfer medium can be chosen thanks to opto electrical converters Thus the RS485 bus allows low cost wiring in the cubicles and an interference free opti cal connection to the master can be estab lished For IEC 61850 an interoperable system so lution is offered with SICAM PAS Via the 100 Mbits s Ethernet bus the units are linked with PAS electrically or optically to the station PC The interface is standard ized thus also enabling direct connection of units of other manufacturers to the Ethernet bus With IEC 61850 however th
27. External communication converter to interface between the relays optical 820 nm interfac and G703 E1 or G703 T1 interface of a communi cation network Inputs 2 fiber optic inputs 820 nm 1 RS232 input Output G703 5 G703 6 Electrical interface on communication network Siemens SIP Edition No 6 Max 1 5 km with 62 5 125um multi mode 1 FO cable to device side E1 2 048 kbit s T1 1 554 kbit s max 800 m screw type terminal 7 Line Differential Protection 7SD61 External communication converter 7XV5662 0AC00 for pilot wires External communication converter to interface between relays optical 820 nm interface and a pilot wire or twisted telephone pair 15 km Max 1 5 km with 62 5 125 pm multi mode FO cable Screw type terminal 5 kV isolated Typical distance Fiber optic 820 nm with clock re covery Pilot wire Permissible time delay duration of data transmission Delay of telegrams due to trans mission for one unit to the other Max 30 ms per transmission path Permissible max value can be Delay is constantly measured and selected adjusted Electrical tests Specification Standards IEC 60255 product standards ANSI IEEE C37 90 0 1 2 UL 508 For further standards see Individual functions Insulation tests Standards IEC 60255 5 Voltage test 100 test All circuits except for auxiliary supply binary inputs and communication interfaces 2 5 kV r m s 50
28. LRA 40 P5 89 X41 X42 X43 B017 t Lipe 739 BO18 P7 88 BO19 P8 138 BO20 P P11 B021 PT2 9 P13 BO22 Pid B023 Pig 34 BO24 T LHS 166 NC or NO i with Jumper 2 0 ipa 5 H5 65 BO25 LHe 5 BO26 H7 64 BO27 H8 114 H9 63 B028 H10 3 H11 62 B029 H12 2 H13 161 B030 H14 1 BO31 ais 160 Live status contact et TLKS 74 20 NC or NO Le 21 with Jumper K4 24 Power K1 37 L 64 22 N A supply NVL K2 38 L 63 23 1 f 3 Serial S 62 24 interfaces l 15 2 3 L z E E z E S 2 Ps Fig 7 88 Maximum version in housing 1 1 x 19 For unit version 7SD52xx xR P T high speed contacts 1 Configuration of binary outputs until Hardware version EE For advanced flexibility see Fig 7 89 7 80 Siemens l E M E N S siemens russia com
29. SIP Edition No 6 EN 60255 6 IEC 60255 6 DIN VDE 0435 Part 303 5 to 55 C gt 55 C 131 F decreased display contrast 20 to 70 C 4to 158 F 25 to 55 C 13 to 131 F 25 to 70 C 13 to 158 F Mean value per year lt 75 relative humidity on 30 days a year up to 95 relative humidity condensation not permissible All current values refer to the symmetrical current using standard connection JM une 0 to 1 5 step 0 01 JM une 0 5 to 2 5 step 0 01 0 to 60 s step 0 01 s 10 to 80 Approx 0 7 drop off ratio FRestraint 0 Approx 20 to 28 ms without restraint by 2 4 harmonic Approx 32 to 42 ms with restraint by 2 harmonic Approx 35 ms 3 of setpoint min 0 02 x Jy 5 of setpoint min 0 02 x Jy 1 lt 1 10K lt 4 2 Symmetric telephone pairs are recom mended with loop resistance 73 Q km and capacitance 60 nF km Max 10 1200 Q lt 1 2 kV however max 60 of the test voltage of the pilot wires gt 1 2 kV however max 60 of the test voltage of the pilot wires and max 60 of the test voltage of the isolat ing transformers 7 Line Differential Protection 7SD60 Pilot wire monitoring and intertripping optional Monitoring signal Alarm signal delay Inherent delay time of intertripping Extension of the intertripping signal Emergency overcurrent protection Setting ranges Overcurrent pickup value
30. afpen tif Fig 7 2 Rear view flush mountig housing 7 4 Siemens sd E M E N S siemens russia com Protection functions Mode of operation of the differential pro tection relay An external summation current transformer 4AM49 which can be supplied as an acces sory either ina 1 A or a 5 A version allows any secondary currents of the primary cur rent transformers see Fig 7 3 to be connected The standard ratios of the three primary windings of the summation current transformer are IL1 IL2 IL3 5 3 4 IL1 IL3 ILO 2 1 3 see Fig 7 6 In con sequence the sensitivity of the tripping characteristic for single phase faults is ap preciably higher compared to that for two phase and three phase faults Since the current on such faults is often weak an am plification factor of 1 7 to 2 8 referred to the symmetrical response value is achieved Other sensitivity values can however be obtained by altering the connections at the summation CT With a symmetrical three phase current of 1 x Jy the secondary current of the summa tion current transformer is 20 mA The 7SD60 measures and digitalizes the current Jj of the local relay by means of a sensitive current input see Fig 7 6 A volt age drop occurs across a fixed value resistor Rp installed in the unit With a through flowing load or a through flowing short circuit current the voltage drop at both ends of the line is approximately equal but of opposit
31. available two definite time and two inverse time stages each for phase and earth Using the for ward pickup indication as a signal to the re mote end a 100 protection coverage of the line can be operated in parallel to the differential protection Instantaneous high speed switch onto fault overcurrent protection ANSI 50HS Instantaneous tripping is possible when energizing a faulty line On large fault currents the high speed switch onto fault overcurrent stage can initiate very fast three pole tripping Circuit breaker closure onto a faulty line is also possible provided that the circuit breaker auxiliary contacts of the remote end are connected and monitored If an overcurrent arises on closing of the cir cuit breaker at one end of a line while the other end is energized the measured cur rent can only be due to a short circuit In this case the energizing line end is tripped instantaneously In the case of circuit breaker closure the auto reclosure is blocked at both ends of the line to prevent a further unsuccessful closure onto a short circuit If circuit breaker intertripping to the re mote end is activated intertripping is also blocked Auto reclosure ANSI 79 The 7SD610 relay is equipped with an auto reclose function AR The function includes several operating modes s 3 pole auto reclosure for all types of faults different dead times are available depending the type of fault s 1 pole auto
32. commissioning Differential protection tripping characteristic Stability can be checked by using the oper ating characteristic as well as the calculated differential and restraint values in the browser windows If the distance protection is active then the valid zone characteristic quadrilateral mho is displayed Event log and trip log messages are also available Remote control can be used if the local front panel cannot be accessed 7 54 Siemens SIF Aii Z WOOF siemens russia com Protection functions E Control and automation functions Control In addition to the protection functions the SIPROTEC 4 units also support all control and monitoring functions that are required for operating medium voltage or high voltage substations The main application is reliable control of switching and other processes The status of primary equipment or auxil iary devices can be obtained from auxiliary contacts and communicated via binary in puts Therefore it is possible to detect and indicate both the OPEN and CLOSED po sition or a fault or intermediate circuit breaker or auxiliary contact position The switchgear or circuit breaker can be controlled via integrated operator panel binary inputs substation control and protection system DIGSI 4 Command processing All the functionality of command process ing is offered This includes the processing of single and double commands with or with
33. conditions In addition the differential and restraint cur rents are also displayed Important com munication measurements such as delay time or faulty telegrams per minute hour are also available as measurements These measured values can be processed with the help of the CFC logic editor Special attention has been paid to commis sioning All binary inputs and outputs can be displayed and activated directly This can simplify the wiring check significantly for the user The operational and fault events and the fault records are clearly arranged Furthermore all currents and optional voltages and phases are available via com munication link at the local relay and are displayed in the relay with DIGSI 4 or with the Web Monitor The operational and fault events and fault records from all line ends share a common time tagging which allows to compare events registered in the different line ends on a common time base In addition to the universal DIGSI 4 oper ating program the relay contains a WEB server that can be accessed via a telecom munication link using a browser e g Internet Explorer The advantage of this solution is to operate the unit with stan dard software tools and at the same time make use of the Intranet Internet infra structure This program shows the protec tion topology and comprehensive measurements from local and remote line ends Local and remote measurements are shown as phasors and the breaker
34. differential current is calcu lated for each line end nearly at the same time This leads to fast and uniform tripping times Under weak infeed conditions es pecially when the differential function is combined with an overcurrent pickup a phase selective intertrip offers a tripping of both line ends e 7SD610 has 4 intertrip signals which are transmitted in high speed mode 20 ms to the other terminals These intertrip sig nals can also be initiated and transmitted by an external relay via binary inputs In cases where these signals are not em ployed for breaker intertripping other alternative information can be rapidly transmitted to the remote end of the line In addition four high speed remote com mands are available which can be intro duced either via a binary input or by means of an internal event and then ra pidly communicated to the other end Provided that the circuit breaker auxiliary contacts are wired to binary inputs at the line ends the switching status of the cir cuit breakers is indicated and evaluated at the remote ends of the line Otherwise the switching status is derived from the mea sured current 7 Line Differential Protection 7SD61 NS Tripping area litt In operation Restraint area a 0 3 Spo nee f g c Ioi A S P d 8 8 a A lt Adaptive restraint E Basic restraint restraint 5 pi gt In operation Fig 7 14 Tripping characteristic Po
35. during switch onto fault conditions with the overreach distance zone Z1B or just with pickup in any zone The switch onto fault initiation can be de tected via the binary input manual close or automatically via measurement Fault locator The integrated fault locator calculates the fault impedance and the distance to fault The result is displayed in ohms miles kilometers or in percent of the line length Parallel line and load current compensa tion is also available As an option for a line with two ends a fault locator function with measurement at both ends of the line is available Thanks to this feature accuracy of mea surement on long lines under high load conditions and high fault resistances is considerably increased Overvoltage protection undervoltage protection ANSI 59 27 A voltage rise can occur on long lines that are operating at no load or are only lightly loaded The 7SD52 53 contains a number of overvoltage measuring elements Each measuring element is of two stage design The following measuring elements are available e Phase to earth overvoltage e Phase to phase overvoltage e Zero sequence overvoltage The zero sequence voltage can be con nected to the 4 voltage input or be de rived from the phase voltages s Positive sequence overvoltage of the lo cal end or calculated for the remote end of the line compounding Negative sequence overvoltage Tripping by the overvoltage me
36. emission type tests Standard Conducted interference voltage on lines only auxiliary voltage IEC CISPR 22 Radio interference field strength TEC CISPR 22 7 34 EN 50081 1 generic standard 150 kHz to 30 MHz Limit class B 30 to 1000 MHz Limit class B Mechanical dynamic tests Vibration shock stress and seismic vibration During operation Standards Vibration IEC 60255 21 1 class 2 IEC 60068 2 6 Shock IEC 60255 21 2 class 1 IEC 60068 2 27 Seismic vibration IEC 60255 21 2 class 1 IEC 60068 3 3 During transport Standards Vibration IEC 60255 21 1 class 2 IEC 60068 2 6 Shock IEC 60255 21 2 class 1 IEC 60068 2 27 Continuous shock IEC 60255 21 2 class 1 IEC 60068 2 29 Climatic stress test Temperatures Type tested acc to IEC 60068 2 1 and 2 test Bd for 16h Temporarily permissible operating temperature tested for 96 h IEC 60255 21 and IEC 60068 2 Sinusoidal 10 to 60 Hz 0 075 mm amplitude 60 to 150 Hz 1 g acceleration frequency sweep 1 octave min 20 cycles in 3 orthogonal axes Half sinusoidal Acceleration 5 g duration 11 ms 3 shocks on each of the 3 axes in both directions Sinusoidal 1 to 8 Hz 3 5 mm amplitude horizontal axis 1 to 8 Hz 1 5 mm amplitude vertical axis 8 to 35 Hz 1 g acceleration horizontal axis 8 to 35 Hz 0 5 g acceleration vertical axis frequency sweep 1 octave min 1 cycle in 3 orthogonal axes IEC 60255 21 and
37. gt Earth current pickup 3 o gt Phase current pickup Iph gt with directional element Earth current pickup 31o gt with directional element 0 05 to 25 Aq a 0 25 to 125 Avs a step 0 01 A Time delay 0 to 30 s step 0 01 s or deactivated Tolerances Current pickup lt 3 setting value or 1 of Iy Delay times 1 setting value or 10 ms Operating time Approx 25 ms Siemens SIP Edition No 6 7 Line Differential Protection 7SD61 Inverse time stage ANSI 51 51N Phase current pickup Jp Earth current pickup 3 op Phase current pickup Ip gt with directional element Earth current pickup 3lop gt with directional element Tripping characteristics Tripping time characteristics acc to TEC 60255 3 Tripping time characteristics acc to ANSI IEEE not for DE region see selection and ordering data 10th position Time multiplier for IEC characteris tics T Time multiplier for ANSI characteristics D Pickup threshold Reset threshold Tolerances Operating time for 2 lt li lt 20 0 1 to 4 A 1a 0 5 to 20 A 5a step 0 01 A 0 05 to 4 A qa 0 25 to 20 A 5A step 0 01 A 0 1 to 4 AG a 0 5 to 20 Ais A step 0 01 A 0 05 to 25 1 a 0 25 to 20 Avs a step 0 01 A Normal inverse very inverse ex tremely inverse long time inverse Inverse short inverse long inverse moderately inverse very inverse extremely inverse definite inverse Tp 0 05 to 3
38. ms The differential protection scheme is fully available in a chain topology Browser based commissioning tool Fault locator for one and two terminal measurement for high accuracy on long lines with high load and high fault resis tance Capacitive charge current compensation increases the sensitivity of the differential protection on cables and long lines Function overview Protection functions e Differential protection with phase segregated measurement 87L 87T s Restricted earth fault protection 87N ifa transformer is within the protection zone e Sensitive meas stage L high resist faults e Non switched distance protection with 7 measuring systems 21 21N e High resistance ground earth fault protection for single and three pole tripping 50N 51N 67N e Phase selective intertripping 85 e Earth fault detection in isolated and resonant earthed networks s Tele pilot protection 85 21 85 67N e Weak infeed protection 27W1 e Fault locator FL e Power swing detection tripping 68 68T e 3 stage overcurrent protection 50 50N 51 51N e STUB bus protection 50 STUB e Switch onto fault protection 50HS e Over undervoltage protection 59 27 Over underfrequency protection 810 U e Auto reclosure 79 Synchro check 25 s Breaker failure protection 50BF e Overload protection 49 e Lockout function 86 Control functions e Commands f ctrl of CB and isolators M
39. pair Data isolation Piei pilot wire 9 exchange and transmission is effected via S E S E E 8 COOOOSOOTOOOOOOOOO4 3 pilot wires of a typical length of 15 km n raS 5 S H up to m 3 Herea transformer is in the protected zone Communication Communication S In this application 7SD610 is set like a converter converter 3 7XV5662 0AC00 75p610 transformer differential relay Vector group 7SD610 Module 1 matching and inrush restraint is provided required by the relay Note 20 kV isolation with isolation transformer 7XR9516 Fig 7 12 Typical applications Siemens SIP Edition No 6 5 I E MI E N S siemens russia com 7 Line Differential Protection 7SD61 Construction The 7SD610 is available in a housing width of 1 3 referred to a 19 module frame sys tem The height is a uniform 245 mm for flush mounting housings and 266 mm for surface mounting housings All cables can be connected with or without cable ring lugs Plug in terminals are avail able as an option it is thus possible to em ploy prefabricated cable harnesses In the case of surface mounting on a panel the connection terminals are located above and below in the form of screw type terminals The communication interfaces are located on the same sides of the housing For di mensions please refer to Dimension draw ings Protection functions Differential protection ANSI 87L 87T 87N The differential protection funct
40. provided on the front panel on the unit allows the parameters status and fault event data to be rapidly ac cessed by means of the DIGSI 4 operating program Use of this program is particularly advantageous during testing and commis sioning Rear mounted interfaces The service and system communication in terfaces are located at the rear of the unit In addition the 7SD610 is provided with a protection interface The interface comple ment is variable and retrofitting is possible without any difficulty These interfaces ensure that the requirements for different communication interfaces electrical and optical and protocols can be met The interfaces are designed for the following applications Service modem interface By means of the RS485 interface it is possi ble to efficiently operate a number of pro tection units centrally via DIGSI 4 Remote operation is possible on connection of a modem This offers the advantage of rapid fault clarification especially in the case of unmanned power plants In the case of the 7SD610 a PC witha standard browser can be connected to the service interface refer to Commissioning program System interface This interface is used to carry out commu nication with a control or protection and control system and supports a variety of communication protocols and interface de signs depending on the module connected 7 Line Differential Protection 7SD61 Com
41. s step 0 01 s or deactivated Dip 0 5 to 15 step 0 01 or deactivated Approx 1 1 lis ANSI I Ip M Approx 1 05 x I Ip ANSI I Ip M lt 5 of setpoint 15 ms Instantaneous high speed switch onto fault overcurrent protection ANSI 50HS Operating mode Characteristic Pickup current gt gt gt Pickup current gt gt gt gt Reset ratio Tolerances Current starting Auto reclosure ANSI 79 Number of auto reclosures Operating modes with line voltage check Dead times T1 ph T3 ph Tseq Action times Reclaim times CLOSE command duration Tolerances Time stages Voltage limit values Active only with connected auxiliary contacts 2 independent stages 0 1 to 15 A 1a 0 5 to 75 A 5a step 0 01 A or deactivated 1 to 25 A 1a 5 to 125 A 5a step 0 01 A or deactivated Approx 0 95 lt 3 of setting value or 1 IN Up to 8 Only 1 pole only 3 pole 1 or 3 pole adaptive AR Discrimination between successful and non successful reclose attempts 0 01 to 1800 s step 0 01 s or deacti vated 0 01 to 300 s step 0 01 s or deacti vated 0 5 to 300 s step 0 01 s 0 01 to 30 s steps 0 01 s 1 of setting value or 10 ms lt 3 of setting value or 0 5 V SIEMENS siemens russia com 7 Line Differential Protection 7SD61 Technical data Breaker failure protection ANSI 50BF Number of stages Pickup of current element Time delays Tl
42. step 0 01 s 1 of setting value or 10 ms lt 2 of setting value or 2 V SIEMENS slemens russia com 7 Line Differential Protection 7SD52 53 Technical data Restricted earth fault protection ANSI 87N Multiple availability 2 times option Settings Differential current rer gt INobj 0 05 to 2 00 steps 0 01 Limit angle P REE 110 fixed Time delay TREF 0 00 to 60 00s steps 0 01 s The set times are pure delay times Operating times Pickup time in ms at frequency At 1 5 setting value Jrer gt approx At 2 5 setting value Jrer gt approx Dropout time in ms approx Dropout ratio approx or deactivated no trip 50 Hz 60 Hz 30 25 28 24 26 23 0 7 Overcurrent time protection for phase and residual currents Multiple availability Characteristics Definite time stages DT Inverse time stages IT Acc to IEC Acc to ANSI Reset characteristics IT Current stages High current stages Iph gt gt Tih gt gt 3hb gt gt T31 gt gt Definite time stages Iph gt Tih 3b gt Tso gt Inverse time stages Tp Acc to IEC Tip 3lop T3ioP Inverse time stages Jp Acc to ANSI Dip 3lop Diop 7 70 3 times option Th gt gt 310 gt gt ph gt 310 gt Tp 310p Inverse very inverse extremely inverse long time inverse Inverse moderately inverse very inverse extremely inverse definite inverse short inverse long inverse Alt
43. the RS232 RS485 or optical interface it is possible to efficiently oper ate a number of protection units cen trally via DIGSI 4 or standard browser Remote operation is possible on connec tion of a modem This offers the advan tage of rapid fault clarification especially in the case of unmanned power plants With the optical version centralized op eration can be implemented by means of a star coupler System interface This interface is used to carry out com munication with a control or protection and control system and supports a var iety of communication protocols and in terface designs depending on the mod ule connected Commissioning aid via a standard Web browser In the case of the 7SD52 53 a PC with a standard browser can be connected to the local PC interface or to the service interface refer to Commissioning program The relays include a small Web server that sends its HTML pages to the browser via an established dial up network connection Retrofitting Modules for every type of communication Communication modules for retrofitting are available for the entire SIPROTEC 4 unit range These ensure that where differ ent communication interfaces electrical or optical and protocols IEC 61850 Ethernet IEC 60870 5 103 PROFIBUS FMS DP DNP 3 0 DIGSI etc are required such demands can be met Safe bus architecture e RS485 bus With this data transmission via copper conductors electromagne
44. the requirements of all existing communication media If the communica tion method is changed flexible retrofitting of communication modules to the existing configuration is possible Apart from the main protection function i e the differential protection the 7SD610 has a full range of configurable emergency and or back up protection functions such as phase and earth overcurrent protection with directional elements if voltage trans formers are connected Overload under and over voltage frequency and breaker failure protection round off the functional scope of the 7SD610 Function overview Protection functions e Differential protection for universal use with power lines and cables on all volt age levels with phase segregated mea surement 87L e Two line ends capability e Suitable for transformers in protected zones 87T s Restricted earth fault protection 87N ifa transformer is within the protection zone e Well suited for serial compensated lines e Two independent differential stages one stage for sensitive measuring for high resistance faults and one stage for high current faults and fast fault clearance s Breaker failure protection 50BF s Phase and earth overcurrent protection with directional element 50 50N 51 51N 67 67N e Phase selective intertripping 85 e Overload protection 49 e Over undervoltage protection 59 27 e Over underfrequency protection 810 U e Auto reclosure single t
45. tripping is possible Overhead lines can be equipped with or without series capacitor compensa tion Quadrilateral and mho characteristics The 7SD52 53 relay provides quadrilateral as well as mho zone characteristics Both characteristics can be used separately for phase and ground earth faults Resistance ground earth faults can for instance be covered with the quadrilateral characteris tic and phase faults with the mho charac teristic Alternatively the quadrilateral characteris tic is available with 4 different pickup methods e Overcurrent pickup I gt gt e Voltage dependent overcurrent pickup V I e Voltage dependent and phase angle dependent overcurrent pickup V I e Impedance pickup Z lt Load zone In order to guarantee a reliable discrimi nation between load operation and short circuit especially on long high loaded lines the relay is equipped with a select able load encroachment characteristic Impedances within this load encroachment characteristic prevent the distance zones from unwanted tripping Absolute phase selectivity The distance protection incorporates a well proven highly sophisticated phase se lection algorithm The pickup of unfaulted loops is reliably eliminated to prevent the adverse influence of currents and voltages in the fault free loops This phase selection algorithm achieves single pole tripping and correct distance measurement in a wide application range
46. 103 protocol VDEW Asso ciation of German Utilities interface thus allowing the unit to be integrated in a substation control system However only 2 messages ready for operation and the trip signal and the fault recording are available For this reason it is recommended to use the 7SD610 unit combined with an exter nal communication converter for pilot wires in those cases in which integration in the substation control system is a prime consideration 7 Line Differential Protection 7SD60 RS232 lt gt RS485 Protection Protection Protection Converter relay 1 relay 2 relay 32 A BO D D Terminating resistor Sp Ra 120 Q cable dependent RS232 L LSA2001 agpen eps Fig 7 4 Bus communication via RS485 interface For convenient wiring of RS485 bus use bus cable system 7XV5103 see part 13 of this catalog Siemens SIP Edition No 6 SIEMENS siemens russia com 7 Line Differential Protection 7SD60 Connection diagrams Fig 7 6 Standard connection L1 L3 E suitable for all types of networks CAUTION The pilot wires may neither be earthed nor fitted with surge arresters 4AM4930 summation i current transformer Y H 7 9 i F i i M z Jumpers D G B E Pilot wires LSA2363 bgpen eps
47. 33 Q7 F10 52 Q8 45 REH VY M Live status 44 R17 STT T La Vo contact 60 RST T T U Power 59 R16 supply 26 BIT VL v B04 25 R14 43 R1 BO BOS R7 55 58 R2 BO2 R8 40 42 R3 BOS R9 54 BIG A 57 R4 R10 39 7 RTI 53 BI7 i R12 38 16 L Serial interface lt l Earth at see below l amp i i rear of housing 2 Fig 7 40 Oe ee ae 7 3 Connection diagram ba S S T e E D Protection data Q interface Service interface D c DIGSI Modem L O System interf si ystem interface SIE O rg A Time synchronization 1 a E Front interface R Fig 7 41 2 g Serial interfaces 2 By 742 semen SEMI ENS slemens russia com SIPROTEC 4 7SD52 53 7 Line Differential Protection 7SD52 53 Multi End Differential and Distance Protection in One Relay LSP2173f eps Fig 7 42 SIPROTEC 4 7SD52 53 differential protection relay LSP2314 afp eps The 7SD52 53 relay provides full scheme differential protection and incorporates all functions usually required for the protec tion of power lines It is designed for all power and distribution levels and protects lines with two up to six line ends The relay is designed to provide high speed and phase selective fault clearance The relay uses fiber optic cables or digital communi cation networks to exchange telegrams and includes special features for the use in mul tiplexed communication networks Also pilot wires connections can be use
48. 48 V DC N 60 110 125 V DC A 220 250 V DC 115 V AC 50 60 Hz Unit design For panel surface mounting with terminals at the side with terminals on top and bottom For panel flush mounting or cubicle mounting m Operating language English alternatively either German or Spanish can be selected Scope of functions Differential protection Differential protection inrush restraint Differential protection pilot wire monitoring remote trip Differential protection pilot wire monitoring remote trip inrush restraint M IKA l 4169 DIGSI4 Software for configuration and operation of Siemens protection units running under MS Windows Windows 2000 or XP Professional device templates Comtrade Viewer electronic manual included as well as Getting started manual on paper connecting cables copper Basis Full version with license for 10 computers on CD ROM authorization by serial number 7XS5400 0AA00 Professional DIGS 4 Basis and additionally SIGRA fault record analysis CFC Editor logic editor Display Editor editor for default and control displays and DIGSI 4 Remote remote operation 7XS5402 OAA00 SIGRA4 generally contained in DIGSI Professional but can be ordered additionally Software for graphic visualization analysis and evaluation of fault records Can also be used for fault records of devices of other manufacturers Comtra
49. 4AM49 87L e Suitable for use for distances of approx 12 km max via two pilot wires 1200 Q loop resistance e Differential protection can be com bined with an overcurrent release e Pilot wire monitoring function e Bidirectional remote tripping e Circuit breaker intertripping at the remote station e Seal in of the TRIP command until manual reset Lockout function e Minimal current transformer requirements due to integrated saturation detector e Restraint against inrush undelayed trip for high differential fault currents e Emergency overcurrent protection Operational measured values e Local and remote current e Differential current e Restraint current Monitoring functions e Hardware e Firmware e Spill current supervision Hardware e Local operation by means of integrated keyboard e LCD display for settings and analysis e Housing Flush mounting housing 1 6 19 7XP20 Surface mounting housing 1 6 19 7XP20 Communication e Via personal computer and DIGSI 3 e Via RS232 lt gt RS485 converter e With modem e With substation control system via IEC 60870 5 103 protocol e 2kV isolated RS485 interface Siemens SIP Edition No 6 bus connection possible SIEMENS siemens russia com 7 Line Differential Protection 7SD60 Application The 7SD60 relay is a numerical current differential protection relay simple to set and is operated in conjunction w
50. 703 64 kbit s synchronous communication interfaces Connection via FO cable for 62 5 125 um or 50 120 um and 820 nm wavelength multi mode FO cable with ST connector max distance 1 5 km Electrical connection via X21 RS422 or G703 64 kbit s interface Order No 7XV5662 0AA00 Opto electric communication converter CC 2M to G703 E1 T1 communication networks with 2 048 1 554 kbit s Converter to interface between optical 820 nm interface and G703 E1 T1 interface of a communication network Connection via FO cable for 62 5 125 um or 50 120 um and 820 nm wavelength multi mode FO cable with ST connector max distance 1 5 km Electrical connection via G703 E1 T1 interface 7XV5662 0AD00 Opto electric communication converter connection to pilot wire Converter to interface to a pilot wire or twisted telephone pair typical 15 km length Connection via FO cable for 62 5 125 um or 50 120 um and 820 nm wavelength multi mode FO cable with ST connector max distance 1 5 km screw type terminals to pilot wire 7XV5662 0ACOO Additional interface modules Protection data interface mod opt 820 nm multi mode FO cable ST connector 1 5 km Protection data interface mod opt 820 nm multi mode FO cable ST connector 3 5 km C53207 A351 D651 1 C53207 A351 D652 1 Further modules Protection data interface mod opt 1300 nm mono mode FO cable LC Duplex connector 24 km Protection data interface mod opt 1300 nm m
51. A 0 05 to 4 A qa 0 25 to 20 A 5a step 0 01 A 0 1 to 8 A qaa 0 5 to 40 A 5a step 0 01 A 20 to 70 V step 1 V 40 to 130 V step 1 V 30 to 80 90 to 120 Ground earth fault pickup Neutral residual current 31 Ground current Zero sequence voltage 3 Vo gt for earthed networks for resonant earthed networks Zero sequence compensation Selectable input formats Separately selectable for zones Rel RL and Xe XL ko ko Parallel line mutual compensation Ru Ry and AMAL Phase reference on double earth faults in resonant earthed non earthed network Load encroachment Minimum load resistance Maximum load angle Directional decision for all types of faults Directional sensitivity Tolerances Impedances in conformity with DIN 57435 Part 303 Response values in conformity with DIN 57435 Part 303 Vand I Angle 0 Timer tolerance Operating times Minimum trip time with fast relays Minimum trip time with high speed relays Reset time 0 05 to 4 A 1a 0 25 to 20 A 5a step 0 01 A 1 to 100 V step 1 V or deactivated 10 to 200 V step 1 V Rei R and XIX ko and ko AN higher zones Z1B Z2 to Z5 0 33 to 7 step 0 01 0 to 4 step 0 001 135 to 135 step 0 01 refer to ordering code 0 00 to 8 step 0 01 Phase preference or no preference selectable 0 10 to 600 Qua 0 02 to 120 Qa step 0 001 Q or deactivated 20 to 60 ste
52. AM 80 1 kHz 30 A m 50 Hz continuous 300 A m for 3 s 50 Hz 0 5 mT 50 Hz 2 5 to 3 kV peak 1 MHz to 1 5 MHz decaying oscillation 50 shots per s duration 2 s Ri 150 Q to 200 Q 4 to 5 kV 10 150 ns 50 shots per s both polarities duration 2 s R 80Q 10 to 20 V m 25 to 1000 MHz amplitude and pulse modulated limit class A Mechanical dynamic tests Vibration shock stress and seismic vibration During operation Standards Vibration IEC 60255 21 1 class I IEC 60068 2 6 Shock IEC 60255 21 2 class I Seismic vibration IEC 60255 21 3 class I IEC 60068 2 6 During transport Standards Vibration IEC 60255 21 1 class II IEC 60068 2 6 Shock IEC 60255 21 2 class I IEC 60068 2 27 Continuous shock IEC 60255 21 2 class I IEC 60068 2 29 TEC 60255 21 IEC 60068 2 Sinusoidal 10 to 60 Hz 0 035 mm amplitude 60 to 150 Hz 0 5 g acceleration sweep rate 1 octave min 20 cycles in 3 orthogonal axes Half sine 5 gacceleration duration 11 ms 3 shocks in each direction of 3 orthogonal axes Sinusoidal 1 to 8 Hz 3 5 mm amplitude horizontal axis 1 to 8 Hz 1 5 mm amplitude vertical axis 8 to 35 Hz 1 gacceleration horizontal axis 8 to 35 Hz 0 5 g acceleration vertical axis Sweep rate 1 octave min 1 cycle in 3 orthogonal axes IEC 60255 21 IEC 60068 2 Sinusoidal 5 Hz to 8 Hz 7 5 mm amplitude 8 Hz to 150 Hz 2 g acceleration Sweep rate 1 octave min 20 cycle
53. C Integration of auto reclosure in the feeder protection allows evaluation of the line side voltages A number of voltage dependent supplementary functions are thus available e DLC By means of dead line check reclosure is effected only when the line is deenergized prevention of asynchro nous breaker closure e ADT The adaptive dead time is employed only if auto reclosure at the remote station was successful reduction of stress on equipment 7 52 Siemens A E M E N S siemens russia com Protection functions e RDT Reduced dead time is employed in con junction with auto reclosure where no tele protection method is employed When faults within the zone extension but external to the protected line are switched off for rapid auto reclosure RAR the RDT function decides on the basis of measurement of the return volt age from the remote station which has not tripped whether or not to reduce the dead time Synchronism check ANSI 25 Where two network sections are switched in by control command or following a 3 pole auto reclosure it must be ensured that both network sections are mutually synchronous For this purpose a synchro nism check function is provided After verification of the network synchronism the function releases the CLOSE com mand Alternatively reclosing can be en abled for different criteria e g checking that the busbar or line is not carrying a voltage dead line or dead bus
54. CISPR 22 Mechanical dynamic tests EN 50081 generic standard 150 kHz to 30 MHz Limit class B 30 to 1000 MHz Limit class B Vibration shock stress and seismic vibration During operation Standards Vibration IEC 60255 21 1 class 2 IEC 60068 2 6 Shock IEC 60255 21 2 class 1 IEC 60068 2 27 Seismic vibration IEC 60255 21 2 class 1 IEC 60068 3 3 IEC 60255 21 and IEC 60068 2 Sinusoidal 10 to 60 Hz 0 075 mm amplitude 60 to 150 Hz 1 gacceleration frequency sweep 1 octave min 20 cycles in 3 othogonal axes Half sinusoidal acceleration 5 g duration 11 ms 3 shocks each in both directions of the 3 axes Sinusoidal 1 to 8 Hz 3 5 mm amplitude horizontal axis 1 to 8 Hz 1 5 mm amplitude vertical axis 8 to 35 Hz 1 gacceleration horizontal axis 8 to 35 Hz 0 5 g acceleration vertical axis frequency sweep 1 octave min 1 cycle in 3 orthogonal axes 1 Ordering option with high speed contacts required Siemens SIP Edition No 6 7 Line Differential Protection 7SD52 53 During transport Standards Vibration IEC 60255 21 1 class 2 IEC 60255 2 6 Shock IEC 60255 21 2 class 1 IEC 60068 2 27 Continuous shock IEC 60255 21 2 class 1 IEC 60068 2 29 Climatic stress tests Temperatures Type tested acc to IEC 60068 2 1 and 2 test Bd for 16h Temporarily permissible operating temperature tested for 96 h Recommended permanent operating temperature a
55. Dielectric test Distance for RS232 Distance for RS485 For fiber optic cable Optical wavelength Permissible attenuation Distance spanned 9 pin subminiature connector SUB D 500 V 50 Hz Max 15m Max 1000 m IEC 61850 Ethernet IEC 60870 5 103 PROFIBUS DP DNP 3 0 MODBUS 9 pin subminiature connector SUB D 4800 to 38400 baud 500 V 50 Hz Max 15m Max 1000 m ST connector A 820 nm Max 8 dB for 62 5 125 um fiber Max 1 5 km Siemens BT E M E N S siemens russia com Technical data System interface continued PROFIBUS RS485 Dielectric test Baud rate Distance PROFIBUS fiber optic Only for flush mounting housing For surface mounting housing Baud rate Optical wavelength Permissible attenuation Distance 500 V 50 Hz Max 12 Mbaud 1 km at 93 75 kbd 100 m at 12 Mbd ST connector Optical interface with OLM Max 1 5 Mbaud A 820 nm Max 8 dB for 62 5 125 um fiber 500 kbit s 1 6 km 1500 kbit s 530 m Protection data interface R2R interface FOS OMA1 Fiber optic interface For multi mode fiber 62 5 125 um with clock recovery for direct con nection up to 1 5 km or for connec tion to a comm converter 820 nm FO6 OMA2 Fiber optic interface for direct connection up to 3 5 km 820 nm New fiber optic interfaces series FO1 FO30 Fiber optic interface to sup port the IEEE C37 94 interface and for direct fiber optic connection up to 1 5 km FO17 for direct conn
56. E M E N S siemens russia com Technical data Minimum maximum memory Indication Resetting Values Min max of measured values Min max of mean values Energy meters Four quadrant meters Tolerance for cosol gt 0 7 and V gt 50 Vnom and I gt 50 Inom Oscillographic fault recording Analog channels Max number of available recordings Sampling intervals Total storage time Binary channels Max number of displayed binary channels Control Number of switching units Control commands Feed back Interlocking Local control Remote control Siemens SIP Edition No 6 Measured values with date and time Cyclically Via binary input Via the keyboard Via serial interface 3 X Iphase 11 3 X Vehase Ground 3 X VPhase to phase 3Vo Vi P P Q Q5 S f power factor power factor 3 x IPhase J1 P Q S Wes We Wos Wo 5 3 X lase 310 3Iopar 30 Gnd sensitive 3 x lnn 3 X Istab 3 x VPhase 3 Vo Vsync Ven Vx 8 backed up by battery if auxiliary voltage supply fails 20 samplings per cycle Approx 15 s Pickup and trip information number and contents can be freely configured by the user 40 Depends on the number of binary indication inputs and indication command outputs Single command double command 1 1 plus 1 common or 2 pole CLOSE TRIP intermediate position Freely configurable Control via menu function keys Control protection DIGSI pil
57. For operation via copper wire communica tion pilot wires or twisted telephone pair a modern communication converter for copper cables is available This operates with both the two wire and three wire copper connections which were used by conventional differential protection sys tems before The communication con verter for copper cables is designed for 5 kV insulation voltage An additional 20 kV isolation transformer can extend the field of applications of this technique into ranges with higher insulation voltage re quirements The connection via FO cable to the relay is interference free With SIPROTEC 4 and the communication con verter for copper cables a digital follow up technique is available for two wire protec tion systems typical 8 km and all three wire protection systems using exist ing copper communication links Different communication converters are listed under Accessories Communication data e 32 bit CRC check according to CCITT and ITU s Each protection relay possesses a unique relay address e Continuous communication link super vision Individual faulty data telegrams do not constitute an immediate danger if they occur only sporadically The sta tistical availability per minute and hour of the serial protection data interface can be displayed e Supported network interfaces X21 RS422 with 64 or 128 or 512 kbit s or G703 64 kbit s and G703 E1 2 048 kbit s or G703 T1 1 554 kbit s
58. IEC 60068 2 Sinusoidal 5 to 8 Hz 7 5 mm amplitude 8 to 150 Hz 2 g acceleration Frequency sweep 1 octave min 20 cycles in 3 orthogonal axes Half sinusoidal Acceleration 15 g duration 11 ms 3 shocks on each of the 3 axes in both directions Half sinusoidal Acceleration 10 g duration 16 ms 1000 shocks on each of the 3 axes in both directions 25 C to 85 C 13 F to 185 F 20 C to 70 C 4 F to 158 F Recommended permanent operating 5 C to 55 C 25 F to 131 F temperature acc to IEC 60255 6 Legibility of display may be im paired above 55 C 131 C Limiting temperature during permanent storage Limiting temperature during transport Humidity Permissible humidity stress It is recommended to arrange the units in such a way that they are not exposed to direct sunlight or pronounced temperature changes that could cause condensation 25 C to 55 C 13 F to 131 F 25 C to 70 C 13 F to 158 F Annual average lt 75 relative hu midity on 56 days in the year up to 93 relative humidity moisture con densation during operation is not per mitted Siemens Pn E M E N S siemens russia com Technical data Functions Differential protection ANSI 87L 87T Sensitive differential current trip stage Ipit Setting range Ipiff gt IN secondary 1 A 0 1 to 20 A steps 0 01 A secondary 5 A 0 5 to 100 A Trip
59. Line Differential Protection Page SIPROTEC 7SD60 Numerical Pilot Wire Current Differential Protection Relay SIPROTEC 4 7SD61 Differential Protection Relay for Two Line Ends SIPROTEC 4 7SD52 53 Multi End Differential Protection Relay for Two to Six Line Ends Ta BI e 9 iz Ep I initia 7 3 7 17 7 43 S slemens russia cori 7 2 Siemens SEM E N S slemens russia com SIPROTEC 7SD60 7 Line Differential Protection 7SD60 Numerical Pilot Wire Current Differential Protection Relay LSP2001 afpen tif Fig 7 1 SIPROTEC 7SD600 numerical current differential protection relay The 7SD600 relay is a numerical current differential protection relay simple to set operating in conjunction with the remote station via a two pilot wire link It is con nected to the primary current transformers via an external summation current trans former The primary field of application of the relay is protection of short overhead lines and cables with two line ends How ever transformers and reactors may be lo cated within the protection zone Features like inrush restraint lockout modern PCM intertrip facilities full self monitor ing facilities local and remote interroga tion are integrated in the unit Function overview Differential protection relay for overhead lines and cables e Current differential protection with ex ternal summation current transformer
60. SIEMENS siemens russia com 7 Line Differential Protection 7SD61 Protection functions Thermal overload protection ANSI 49 A built in overload protection with a cur rent and thermal alarm stage is provided for thermal protection of cables and transform ers The trip time characteristics are exponential functions according to IEC 60255 8 The preload is considered in the trip times for overloads An adjustable alarm stage can initiate an alarm before tripping is initiated Overcurrent protection ANSI 50 50N 51 51N 67 67N The 7SD610 provides a three stage over current protection Two definite time stages and one inverse time stage IDMT are available separately for phase currents and for the earth current Two operating modes backup emergency are selectable Two stages e g can run in backup mode whereas the third stage is configured for emergency operation e g during interruption of the protection communication and or failure of the voltage in the VT secondary circuit The secondary voltage failure can be detected by the integrated fuse failure monitor or via a binary input from a VT miniature cicuit breaker VT m c b trip The following ANSI IEC inverse time characteristics are available e Inverse e Short inverse e Long inverse e Moderately inverse e Very inverse s Extremely inverse e Definite inverse If VTs are connected separate stages with directional measurement are
61. Tie kee Approx 0 99 Approx 0 99 Approx 0 99 Class 10 acc to IEC 60255 8 Primary secondary and percentage referred to rated value 3 x IPhase 3 310 Ig h D Typical lt 1 of 50 In Typical lt 1 of measured value 3 x VPhase Earth 3 X VPhase Phase 3Vo Vi V2 Ven Typical lt 1 of 50 Vn Typical lt 1 of measured value P Q S Typical lt 3 Typical lt 3 Typical lt 2 f lt 20 mHz p f cos Typical lt 3 3 X Iphase Earth 3 Io 3 X VPhase Earth 3 Vo 0 0 Trip L1 0 0 Trip 12 Gig Trip L3 0 0 Trip 7 Line Differential Protection 7SD61 Fault record storage Measured analog channels Max number of available recordings Sampling intervals Total storage time Binary channels Further additional functions Measured value supervision Indications Operational indications System disturbance indication Switching statistics Circuit breaker test Dead time for CB TRIP CLOSE cycle Commissioning support CE conformity 3 x Iphase 310 3Ipiff 3 x VPhase 3 Vo 3JRestraint 8 backed up by battery if auxiliary voltage supply fails 20 samplings per cycle Approx 10 s Pickup and trip information number and contents can be freely configured by the user Current sum Current symmetry Voltage sum Voltage symmetry Voltage phase sequence Fuse failure monitor Buffer size 200 Storage of signals of the last 8 faults buffer size 600
62. V High energy surge voltages SURGE IEC 61000 4 5 installation class III Auxiliary supply Measurements inputs binary inputs binary outputs Line conducted HF amplitude mod ulated IEC 61000 4 6 class III Magnetic field with power frequency IEC 61000 4 8 class IV TEC 60255 6 Oscillatory surge withstand capability ANSI TEEE C37 90 1 Fast transient surge withstand capability ANSI IEEE C37 90 1 Radiated electromagnetic interfer ence IEEE C37 90 2 Damped oscillations IEC 60894 IEC 61000 4 12 10 V m 900 MHz repetition frequency 200 Hz duty cycle 50 4 kV 5 50 ns 5 kHz burst length 15 ms repetition rate 300 ms both polarities Ri 50 Q test duration 1 min Common mode 2 kV 12 Q 9 uF Differential mode 1 kV 2 Q 18 pF Common mode 2 kV 42 Q 0 5 uF Differential mode 1 kV 42 Q 0 5 uF 10 V 150 kHz to 80 MHz 80 AM 1 kHz 30 A m continuous 300 A m for 3 s 50 Hz 0 5 mT 50 MHz 2 5 to 3 kV peak 1 to 1 5 MHz Damped wave 50 surges per second Duration 2 s Ri 150 Q to 200 Q 4 to 5 kV 10 150 ns 50 surges per second both polarities duration 2 s Ri 80 Q 35 V m 25 to 1000 MHz amplitude and pulse modulated 2 5 kV peak value polarity alternating 100 kHz 1 10 and 50 MHz Ri 200 Q EMC tests for interference emission type tests Standard Conducted interference voltage on lines only auxiliary supply TEC CISPR 22 Radio interference field strength TEC
63. V bipolar 17 or 73 V selectable 17 or 73 V DC bipolar 300 V DC Approx 1 8 mA 5 marshallable 1 alarm contact not marshallable 1000 W VA 30 VA 40 W 25 W 250 V 30 A for 0 5 seconds 5 A continuous 1 Ranges are settable by means of jumpers 7 32 LEDs Number RUN green ERROR red LED red function can be assigned Unit design Housing 7XP20 Degree of protection acc to EN 60529 Surface mounting housing Flush mounting housing front rear for the terminals Weight Flush mounting housing 1 3 x 19 Surface mounting housing 13x19 Serial interfaces For dimensions refer to dimension drawings part 15 IP 51 TS IP 50 IP 20 with terminal cover put on 4kg 6kg Operating interface 1 for DIGSI 4 or browser front of unit Connection Baud rate Non isolated RS232 front panel 9 pin subminiature connector SUB D 4800 to 115200 baud setting as supplied 38400 baud parity 8E1 Time synchronization rear of unit DCF77 IRIG B signal format IRIG B000 Connection Voltage levels Dielectric test 9 pin subminiature connector SUB D terminals with surface mounting housing 5 12 or 24 V optional 500 V 50 Hz Service interface op interface 2 for DIGSI 4 modem service browser rear of unit Isolated RS232 RS485 Dielectric test Distance for RS232 Distance for RS485 System interface rear of unit Refer to ordering code Isolated RS232 RS485 Baud rate
64. Voltage limit values Synchro check ANSI 25 Initiate options Operating modes with auto reclosure For manual closure and control commands Permissible voltage difference Permissible frequency difference Permissible angle difference Max duration of synchronization Release delay with synchronous networks Tolerances Time stages Voltage limit values 2 0 05 to 20 Aqa 0 25 to 100 Asa step 0 01 A 0 to 30 s steps 0 01 s or deactivated End fault protection CB pole discrepancy monitoring Approx 15 ms typical 25 ms max lt 5 of setting value or 1 Inom 1 of setting value or 10 ms Up to 8 Only 1 pole only 3 pole 1 or 3 pole DLC dead line check ADT adaptive dead time RDT reduced dead time 0 to 1800 s step 0 01 s or deactivated 0 01 to 300 s step 0 01 s or deactivated 0 5 to 300 s step 0 01 s 0 01 to 300 s step 0 01 s Synchro check request 3 phase intertripping InterCLOSE command to the remote end Check of CB ready state Blocking with manual CLOSE 30 to 90 V step 1 V 2 to 70 V step 1 V 1 of setting value or 10 ms lt 3 of setting value or 0 5 V Auto reclosure Manual CLOSE control Control commands Synchro check Line dead busbar live Line live busbar dead Line and busbar dead Bypassing As for auto reclosure 1 to 60 V step 0 1 V 0 03 to 2 Hz step 0 01 Hz 2 to 80 step 1 0 01 to 600 s step 0 01 s or deactivated 0 to 30 s
65. a step 0 01 A or deactivated 0 to 30s step 0 01 s or deactivated lt 3 of set value or 1 of In 1 of set value or 10 ms Approx 25 ms 7 Line Differential Protection 7SD52 53 Inverse time stage ANSI 51 51N Phase current pickup Neutral residual current pickup Characteristics Characteristics according to IEC 60255 3 Time multiplier Pickup threshold Reset threshold Tolerances Operating time for 2 lt I Ip lt 20 Characteristics according to ANSI IEEE Time dial Pickup threshold Reset threshold Tolerances Operating time for 2 lt M lt 20 0 1 to 4 A 1a 0 5 to 20 A 54 step 0 01 A or deactivated 0 05 to 4 A 1a 0 25 to 20 A sa step 0 01 A or deactivated Normal inverse Very inverse Extremely inverse Long time inverse Tp 0 05 to 3 s step 0 01 s or deactivated Approx 1 1 xI Ip Approx 1 05 x I Ip lt 5 of setpoint 15 ms Inverse Short inverse Long inverse Moderately inverse Very inverse Extremely inverse Definite inverse 0 5 to 15 step 0 01 or deactivated Approx 1 1 xM Approx 1 05 x M lt 5 of setpoint 15 ms Instantaneous high speed switch onto fault overcurrent protection ANSI 50HS Operating mode Characteristic Pickup current I gt gt gt Pickup current I gt gt gt gt Reset ratio Tolerances Active only after c b closing instantaneous trip after pickup 2 definite time stages 0 1 to
66. adio and fiber optic links The serial protection data interface can be used for direct connection to a digital communication network fiber optic or pilot wire link as well 7SD52 53 also permits the transfer of phase selective signals This feature is par ticularly advantageous as it ensures reliable single pole tripping if two single pole faults occur on different lines The trans mission methods are suitable also for lines with three ends three terminal lines Fig 7 54 Power swing circle diagram R Ohm Phase selective transmission is also possi ble with multi end applications if some user specific linkages are implemented by way of the integrated CFC logic During disturbances in the transmission receiver or on the transmission circuit the tele protection function can be blocked by a bi nary input signal without losing the zone selectivity The control of the overreach zone Z1B zone extension can be switched over to the auto reclosure function A transient blocking function Current re versal guard is provided in order to sup press interference signals during tripping of parallel lines 7 50 Siemens Bet E M E N S siemens russia com Protection functions Direct transfer tripping Under certain conditions on the power system it is necessary to execute remote tripping of the circuit breaker The 78D52 53 relay is equipped with phase selective external trip inputs that can be assign
67. ailure protection GIES is S E Oee Power swing detec tion tripping Trip circuit supervision Teleprotection for distance protection STUB bus protection Weak infeed protection Directional earth ground fault protection Teleprotection for earth ground fault protection Three stage overcurrent protection Laa Local remote control Command Feedback Trip circuit Garo Lock 4 amp L supervision out h NV HMI Communication Fault Measured values modules recording i V 1 P Q RS232 485 FO s Local esos p IEC61850 1 IV IEC60870 5 103 Remote P Profibus FMS DP pitt TRest DNP 3 0 Energy meter Tt FO 820 nm S L me ane data interface FO 1550 nm G 7 3 Teleprotection schemes A can use conventional signalling or serial Vv data exchange Option Fig 7 43 744 semens LEM ENS siemens russia com Application Typical applications SIPROTEC 78D52 53 is a full scheme dif ferential protection relay for two up to six line ends incorporating all the additional functions for protection of overhead lines and cables at all voltage levels Also trans formers and compensation coils within the protection zone are protected The 78D52 53 is suitable for single pole and three pole tri
68. als 3 positive and 3 negative impulses at intervals of 5 s EMC tests for noise immunity type tests Standards High frequency test IEC 60255 22 1 VDE 0435 Part 303 class III Electrostatic discharge IEC 60255 22 2 EN 61000 4 2 class III Irradiation with RF field non modulated IEC 60255 22 3 class III Irradiation with RF field amplitude modulated IEC 61000 4 3 class III Irradiation with RF field pulse modulated IEC 61000 4 3 ENV 50204 class II Fast transients bursts IEC 60255 22 3 IEC 61000 4 4 class IV Line conducted RF amplitude modulated IEC 61000 4 6 class III Power frequency magnetic field IEC 61000 4 8 class IV EN 60255 6 Oscillatory surge withstand capabil ity ANSI IEEE C37 90 1 common mode Fast transient surge withstand capa bility ANSI IEEE C37 90 1 common mode Radiated electromagnetic interfer ence ANSI IEEE C37 90 2 7 10 IEC 60255 6 IEC 60255 22 international product standard EN 50082 2 generic standard VDE 0435 Part 303 German product standard 2 5 kV peak 1 MHz t 15 us 400 surges duration 2 s 4 6 kV contact discharge 8 kV air discharge both polarities 150 pF Ri 330 Q 10 V m 27 to 500 MHz 10 V m 80 to 1000 MHz AM 80 1 kHz 10 V m 900 MHz repetition rate 200 Hz duty cycle 50 2 kV 5 50 ns 5 kHz burst length 15 ms repetition rate 300 ms both polar ities Ri 50 Q duration 1 min 10 V 150 kHz to 80 MHz
69. als The communication interfaces are located in a sloped case at the top and bottom of the housing LSP2174 afp tif Fig 7 45 Flush mounting housing with screw type terminals LSP2166 afp tif Fig 7 46 Rear view of flush mounting housing with covered connection terminals and wirings Fig 7 47 Surface mounting housing with screw type terminals a a k a G d N AN G E LSP2237 afp tif Fig 7 48 Communication interfaces in a sloped case in a surface mounting housing 7 46 Siemens a j EM E N S siemens russia com Protection functions Differential protection ANSI 87L 87T 87N The differential protection function has the following features e It is possible to select the operating mode as main or as main 1 if the back up distance protection is activated as main 2 Measurements are performed separately for each phase thus the trip sensitivity is independent of the fault type e An adaptive sensitive measurement method with high sensitivity for differen tial fault currents below the rated current offers the detection of highly resistive faults This trip element uses special fil ters which offers high security even with high level DC components in the short circuit current The trip time of this stage is about 30 ms s A high set differential trip stage which clears differential fault currents higher than the rated current within 10 15 ms offe
70. ance zones The diagram shows characteristic without the expansion due to polarizing During a forward fault the polarizing expands the mho circle towards the source so that the origin is included This mho circle expansion guar antees safe and selective operation for all types of faults even for close in faults Siemens SIP Edition No 6 SIEMENS siemens russia com 7 Line Differential Protection 7SD52 53 Protection functions Elimination of interference signals Digital filters render the unit immune to interference signals contained in the meas ured values In particular the influence of DC components capacitive voltage trans formers and frequency changes is consider ably reduced A special measuring method is employed in order to assure protection selectivity during saturation of the current transformers Measuring voltage monitoring Tripping of the distance protection is blocked automatically in the event of fail ure of the measuring voltage thus prevent ing spurious tripping The measuring voltage is monitored by the integrated fuse failure monitor Distance protection is blocked if either the fuse fail ure monitor or the auxiliary contact of the voltage transformer protection switch op erates and in this case the EMERGENCY definite time overcurrent protection can be activated Power swing detection ANSI 68 68T Dynamic transient reactions for instance short circuits loa
71. are thus available e DLC By means of dead line check reclosure is effected only when the line is deenergized prevention of asynchronous breaker closure e ADT The adaptive dead time is employed only if auto reclosure at the remote station was successful reduction of stress on equip ment e RDT Reduced dead time is employed in con junction with auto reclosure where no tele protection method is employed When faults within the zone extension but external to the protected line are switched off for rapid auto reclosure RAR the RDT function decides on the basis of mea surement of the return voltage from the remote station which has not tripped whether or not to reduce the dead time 7 22 Siemens Bet E M E N S siemens russia com Protection functions Breaker failure protection ANSI 50BF The 7SD610 relay incorporates a two stage breaker failure protection to detect the fail ure of tripping command execution for example due to a defective circuit breaker The current detection logic is phase segregated and can therefore also be used in single pole tripping schemes If the fault current is not interrupted after a settable time delay has expired a retrip command or a busbar trip command is generated The breaker failure protection can be initiated by all integrated protection functions as well as by external devices via binary input signals Overvoltage protection undervoltage pro tection ANSI 59 27
72. asuring elements can be effected either at the local circuit breaker or at the remote station by means of a transmitted signal The 7SD52 53 is fitted in addition with three two stage undervoltage measuring elements s Phase to earth undervoltage s Phase to phase undervoltage Positive sequence undervoltage The undervoltage measuring elements can be blocked by means of a minimum cur rent criterion and by means of binary in puts Frequency protection ANSI 810 U Frequency protection can be used for over frequency and underfrequency protection Unwanted frequency changes in the net work can be detected and the load can be removed at a specified frequency setting Frequency protection can be used over a wide frequency range 45 to 55 55 to 65 Hz There are four elements selectable as overfrequency or underfrequency and each element can be delayed separately Breaker failure protection ANSI 50BF The 7SD52 53 relay incorporates a two stage breaker failure protection to detect the failure of tripping command execution for example due to a defective ciruit breaker The current detection logic is phase segregated and can therefore also be used in single pole tripping schemes If the fault current is not interrupted after a settable time delay has expired a retrip command or a busbar trip command is generated The breaker failure protection can be initiated by all integrated protection functions as well as by ext
73. ata Description Order No Short code 7SD61 numerical line differential protection 750610 0 000000 aaoo DDD 87L SIPROTEC 4 continued T AAAA A AA DIGSI Modem interface on rear of device and protection interface 1 9 MOO DIGSI Modem interface on rear of device A A DIGSI 4 electrical RS232 1 DIGSI 4 electrical RS485 2 Protection data interface 1 FOS Optical 820 nm 2 ST plugs line length up to 1 5 km via multimode FO cable for communication converter or direct FO connection A FO6 Optical 820 nm 2 ST plugs line length up to 3 5 km via multimode FO cable for direct FO connection B FO17 Optical 1300 nm LC Duplex plugs line length up to 24 km 7 via monomode FO cable for direct FO connection 2 G FO18 Optical 1300 nm LC Duplex plugs line length up to 60 km via monomode FO cable for direct FO connection 3 H FO19 Optical 1550 nm LC Duplex plugs line length up to 100 km via monomode FO cable for direct FO connection 2 J FO30 Optical 820 nm 2 ST plugs line length up to 1 5 km via multimode FO cable for communication networks with IEEE C37 94 interface or direct FO connection 5 L Functions 1 Trip mode 3 pole only without auto reclosure Trip mode 3 pole only with auto reclosure Trip mode 1 and 3 pole without auto reclosure Trip mode 1 and 3 pole with auto reclosure MIKA lA 169 Back up functions with emergency or back up overcurrent protection B wit
74. cation 1 to 170 V step 0 1 V or deactivated 2 to 220 V step 0 1 V or deactivated 1 to 220 V step 0 1 V or deactivated 2 to 220 V step 0 1 V or deactivated Local positive sequence voltage or calculated remote positive sequence voltage compounding 2 to 220 V step 0 1 V or deactivated 0 5 to 0 98 step 0 01 1 to 100 V step 0 1 V or deactivated 1 to 175 V step 0 1 V or deactivated 1 to 100 V step 0 1 V or deactivated Minimum current binary input 1 05 0 to 100 s steps 0 01 s or deactivated Approx 40 ms lt 3 of setting value or 0 5 V 1 of setting value or 10 ms 4 45 5 to 54 5 Hz in steps of 0 01 at fnom 50 Hz 55 5 to 64 5 Hz in steps of 0 01 at fnom 60 Hz 0 to 600 s or in steps of 0 01 s 6 to 230 V phase to ground earth Approx 85 ms Dropout times Hysteresis Dropout condition Tolerances Frequency Delay times Approx 30 ms Approx 20 mHz Voltage 0 V and current 0 A 12 m Hz for V 29 to 230 V 1 of the setting value or 10 ms Restricted earth fault protection ANSI 87N Multiple availability Settings Differential current IREF gt INobj Limit angle W REF Time delay TREF The set times are pure delay times Operating times Pickup time in ms at frequency 2 times option 0 05 to 2 00 steps 0 01 110 fixed 0 00 to 60 00s steps 0 01 s or deactivated no trip At 1 5 setting value Iger gt approx At 2 5
75. cc to IEC 60255 6 Legibility of display may be im paired above 55 C 131 F Limiting temperature during permanent storage Limiting temperature during transport Humidity Permissible humidity stress It is recommended to arrange the units in such a way that they are not exposed to direct sunlight or pro nounced temperature changes that could cause condensation Functions IEC 60255 21 and IEC 60068 2 Sinusoidal 5 to 8 Hz 7 5 mm amplitude 8 to 150 Hz 2 g acceleration frequency sweep 1 octave min 20 cycles in 3 orthogonal axes Half sinusoidal Acceleration 15 g duration 11 ms 3 shocks each in both directions of the 3 axes Half sinusoidal Acceleration 10 g duration 16 ms 1000 shocks each in both directions of the 3 axes 25 C to 85 C 13 F to 185 F 20 C to 70 C 4 F to 158 F 5 C to 55 C 4 25 F to 131 F 25 C to 55 C 13 F to 131 F 25 C to 70 C 13 F to 158 F Yearly average lt 75 relative humid ity on 56 days in the year up to 93 relative humidity condensation is not permitted Differential protection ANSI 87L 87T Sensitive normal trip stage Ipiff gt Setting range of lnn gt secondary 1 A secondary 5 A Tripping time three line ends lnn gt 2 5 X Ipig gt setting Delay time of Ipif gt trip stage Delay time 0 1 to 20 A step 0 1 0 5 to 100 A 50H72 Min 27 ms T
76. cking of distance protection is provided for all types of secondary voltage failures Additional measurement supervision functions are e Symmetry of voltages and currents e Summation of currents and voltages Trip circuit supervision ANSI 74TC One or two binary inputs for each circuit breaker pole can be used for monitoring the circuit breaker trip coils including the con necting cables An alarm signal is issued whenever the circuit is interrupted Lockout ANSI 86 All binary outputs can be stored like LEDs and reset using the LED reset key The lock out state is also stored in the event of supply voltage failure Reclosure can only be issued after the lockout state is reset Local measured values The measured values are calculated from the measured current and voltage signals along with the power factor cos the frequency the active and reactive power Measured values are displayed as primary or secondary values or in percent of the specific line rated current and voltage The relay uses a 20 bit high resolution AD con verter and the analog inputs are factory calibrated so a high accuracy is reached The following values are available for mea sured value processing Currents 3 x phase 3 Io Ig IE sensitive e Voltages 3x Vehase Ground 3x Vehase Phases 3 Vo Ven e Symmetrical components hi b Vi V2 s Real power P Watt reactive power Q Var apparent power S VA e Power factor PF cos 0
77. connectors Four applications are shown in Fig 7 12 S z The 7SD610 differential protection relay is 2 connected to the current transformers and S to the voltage transformers at one end of the Mono mode FO 9 125 um cable although only the currents are re Module 3 24 km LC connectors S 3 Module 4 60 km LC connectors 4 quired for the differential protection func 7SD610 Module 5 100 km LC connectors 7SD610 tion The voltage connection improves among other things the frequency measure ment and allows the measured values and the fault records to be extended Direct con nection to the other units is effected via mono mode fiber optic cables and is thus 200 km overhead line 400 kV 820 nm immune to interference max X21 RS422 1 5 km o 7 G703 1 Digital m 9 Five different modules are available In the communication a case of direct connection via fiber optic e eee 9 e Z cables data communication is effected at E SEIER 2 512 kbit s and the command time of the 7SD610 7XV5662 0AA00 75p610 S protection unit is reduced to 15 ms Parallel Module 1 lt required compensation for the load currents is provided within the protection zone of the cable By means of the integrated inrush 200 km overhead line 400 kV restraint the differential protection relay can tolerate the surge on switching on of the cable and th
78. contact with jumpers E TS N X41 X42 X43 1 42 1 fr y BI2 BONS R10 70 R11 94 E 2A B015 a1 B 7 BIZ R12 69 40 J4 7 Bl4 i Live status K3 90 14 J5 contact od i NC or NO 39 WA Bis with Jumper K4 65 K1 15 L 38 J7 y BIG rower Gla supply K2 16 L 36 mH BIS Serial A vA interfaces ce 11 J12 2 ie Fig 7 83 Basic version in housing 1 2 x 19 with 8 binary inputs and 16 binary outputs O Protection data O E Service interface O C interface 2 O DIGSI Modem SIII System Scada Oo interface O S E Protection data D interface 1 O Front interface U Time J r synchronization 1 Configuration of binary outputs until Hardware version EE LSA2670 bgpen eps SAAE GIE For advanced flexibility see i E Fig 7 85 Fig 7 84 Serial interfaces 7 78 Siemens E M E N S siemens russia com Connection diagram BOs Bo9 B010 T BO11 BO12 1 2 X41 B013 s2 1 2 BO 4 E 12 X43 BO15 32 T LSA4468 eps Fig 7 87 Additional setting by jumpers Separation of common circuit of BO8 to BO12 with jumpers X80 X81 X82 Switching of BO14 BO15 as NO contact or NC contact with jumpers X41 X42 X43 For unit version 7SD52xx xN S Q high speed contacts 1 C
79. crease selectivity and sen sitivity as well as covering advanced applica tions s Fast phase selective teleprotection signal ing using the directional stages of the overcurrent protection with POTT or PUTT schemes e Two terminal line applications can be implemented without additional logic e Interclose command transfer with the auto reclosure Adaptive dead time ADT mode s 4 remote signals for fast transfer of binary signals e Flexible utilization of the communica tion channels by means of the program mable CFC logic The protection data interfaces have different options to cover new and existing commu nication infrastructures s POST OMA1 module 820 nm fiber optic interface with clock recovery ST connectors for direct connec tion with multi mode FO cable up to 1 5 km for the connection to a communi cation converter s FORT OMA module 820 nm fiber optic interface ST connec tors for direct connection up to 3 5 km with multi mode FO cable New fiber optic interfaces series FOLx e FO17 For direct connection up to 24 km 1300 nm for mono mode fiber 9 125 um LC Duplex connector s FO18 For direct connection up to 60 km 1300 nm for mono mode fiber 9 125 um LC Duplex connector s FO19 For direct connection up to 100 km 1550 nm for mono mode fiber 9 125 um LC Duplex connector s FO30 820 nm fiber optic interface ST connectors for direct connection up to 1 5 km and for connectio
80. d ITU e Each protection relay possesses a unique relay address e Continuous communication link supervi sion Individual faulty data telegrams do not constitute an immediate danger if they occur only sporadically The statisti cal availability per minute and hour of the serial protection data interface can be displayed e Supported network interfaces X21 RS422 with 64 or 128 or 512 kbit s or G703 64 kbit s and G703 E1 2 048 kbit s or G703 T1 1 554 kbit s or IEEE C37 94 e Max channel delay time 0 1 ms to 30 ms in steps of 0 1 ms e Protocol HDLC 1 For flush mounting housing 2 For surface mounting housing 3 For surface mounting housing the internal FO module OMA1 will be delivered together Siemens SIP Edition No 6 with an external repeater siemens russia com 7 Line Differential Protection 7SD61 Communication Communication possibilities between relays Ty Ty max 1 5 km 3 5 km for 62 5 125 um multi mode FO LSA4746en eps ST connectors on both sides Fig 7 25 Direct optical link up to 1 5 km 3 5 km 820 nm max 24 60 100 km for 9 125 um mono mode FO LSA4747en eps LC Duplex connectors on both sides Fig 7 26 Direct optical link up to 25 60 km with 1300 nm or up to 100 km with 1550 nm fe Communication ter max 1 5 km for 62 5 125 um SOnverter multi mode FO 820 nm 7XV5662 0AA00 g e Interface Link to commu
81. d fluctuations auto reclosures or switching operations can cause power swings in the transmission network During power swings large cur rents along with small voltages can cause unwanted tripping of distance protection relays To avoid uncontrolled tripping of the distance protection and to achieve con trolled tripping in the event of loss of syn chronism the 7 D52 53 relay is equipped with an efficient power swing detection function Power swings can be detected under symmetrical load conditions as well as during single pole auto reclosures Tele pilot protection for distance protection ANSI 85 21 A teleprotection function is available for fast clearance of faults up to 100 of the line length The following operating modes may be selected e PUTT permissive underreaching zone transfer trip e POTT permissive overreaching zone transfer trip e UNBLOCKING s BLOCKING s Directional comparison pickup e Pilot wire comparison s Reverse interlocking ea A k Ge x e SB5KSRZS lt aZR YEZ Fig 7 53 Power swing current and voltage wave forms x Ohm e DUTT direct underreaching zone trans fer trip together with Direct Transfer Trip function The carrier send and receive signals are available as binary inputs and outputs and can be freely assigned to each physical relay input or output At least one channel is re quired for each direction Common transmission channels are power line carrier microwave r
82. d with an external converter This contributes to ward improved reliability and availability of the electrical power system The relay is suitable for single and three phase tripping applications for two up to six line ends Also transformers and compensation coils within the differential protection zone are protected as are serial and parallel compensated lines and cables The relays may be employed with any type of system earthing The relay also provides a full scheme and non switched distance protection as an op tional main 2 protection Several telepro tection schemes ensure maximum selectiv ity and high speed tripping time The units measure the delay time in the communication networks and adaptively match their measurements accordingly A special GPS option allows the use of the relays in communication networks where the delay time in the transmit and receive path may be quite different The 7SD52 53 has the following features 2 full scheme main protections in one unit differential and distance protec tion High speed tripping 10 15 ms The serial protection data interfaces R2R interfaces of the relays can flexibly be adapted to the requirements of all communication media available If the communication method is changed flexible retrofitting of commu nication modules to the existing configu ration is possible Tolerates loss of one data connection in a ring topology routing in 120
83. dards ANSI IEEE C37 90 0 and C37 90 1 The unit has been developed and manufactured for application in an industrial environment according to the EMC standards This conformity is the result of a test that was performed by Siemens AG in accordance with Article 10 of the Council Directive complying with the generic standards EN 50081 2 and EN 50082 2 for the EMC Directive and standard EN 60255 6 for the low voltage Directive SIEMENS siemens russia com 7 Line Differential Protection 7SD52 53 Selection and ordering data Description 7SD5 combined multi end line differential protection 7SD5O00 OOOOO0 OOO00 DDD with distance protection Order No Short code a LY H TT T Two terminal differential relay with 4 line display 22 Two terminal differential relay with grapical display 3 2 US Multi terminal differential relay with 4 line display 2 3 see next page Multi terminal differential relay with graphical display 3 3 Measurement input In 1A Ie 1A 1 Ipn 1 A I sensitive min 0 005 A 2 In 5A I 5 A 5 Ipn 5 A Ie sensitive min 0 005 A 6 Auxiliary voltage Power supply BI trigger level 24 to 48 V DC trigger level binary input 19 V 7 2 60 to 125 V DC trigger level binary input 19 V 7 4 110 to 250 V DC 115 V AC trigger level binary input 88 V 7 5 220 to 250 V DC
84. dback to command The positions of the circuit breaker or switching devices and transformer taps are acquired by feedback These indication in puts are logically assigned to the corre sponding command outputs The unit can therefore distinguish whether the indica tion change is a consequence of switching operation or whether it is a spontaneous change of state intermediate position Chatter disable The chatter disable feature evaluates whether in a configured period of time the number of status changes of indication input exceeds a specified figure If ex ceeded the indication input is blocked for a certain period so that the event list will not record excessive operations Filter time All binary indications can be subjected to a filter time indication suppression Indication filtering and delay Indications can be filtered or delayed Filtering serves to suppress brief changes in potential at the indication input The indi cation is passed on only if the indication voltage is still present after a set period of time In the event of indication delay there is a wait for a preset time The information is passed on only if the indication voltage is still present after this time 7 Line Differential Protection 7SD52 53 Indication derivation A further indication or a command can be derived from an existing indication Group indications can also be formed The volume of information to the system in
85. de format Running under MS Windows Windows 2000 and XP Professional Incl templates electronic manual with license for 10 PCs Authorization by serial number On CD ROM 7XS5410 0AA00 Connecting cable Cable between PC notebook 9 pin connector and protection unit 9 pin connector contained in DIGSI 4 but can be ordered additionally 7XV5100 4 Siemens SIP Edition No 6 SIEMENS slemecns russia com 7 Line Differential Protection 7SD60 Accessories 1 Possible versions see part 13 RS485 bus system up to 115 kbaud RS485 bus cable and adaptor 7XV5103 O1AADIC see part 13 Description Converter R232 V 24 RS485 With connecting cable 1 m PC adapter with plug in power supply unit 230 V AC Order No 7XV5700 00000 With plug in power supply unit 110 V AC 7XV5700 10000 Converter RS485 FO Rated auxiliary voltage 24 to 250 V DC and 250 V AC Single optical interface 7XV5650 0BA00 Double optical interface cascadable 7XV565 1 OBA00 Summation current transformer 1 A 50 60 Hz for 7SD600 4AM4930 7DB00 0AN2 5 A 50 60 Hz for 7SD600 4AM4930 6DB00 0AN2 Isolating transformer Up to 20 kV 7XR9513 Up to5 kV 7XR9515 Manual for 7SD60 English E50417 G1176 C069 A3 7 14 Siemens sl E M E N S siemens russia com Connection diagram 7 Line Differential Protection 7SD60 Surface mounting housing termi
86. delayed This unit substitutes the 7SD24 steady state differential protection However direct interoperation with the 7SD24 is not possible On replacement of a 7SD24 its external summation current transformer can be used as the input transformer for the 7SD60 ANSI 87L 87T AI for lines cables transformers Intertrip remote trip Lockout function 00O Single stage definite time emergency overcurrent protection Construction The compact 7SD60 protection relay contains all the components for e Measured value acquisition and evaluation e Operation and LCD indications e Alarm and command contacts e Input and evaluation of binary signals e Data transmission via the RS485 bus interface to DIGSI or a substation control system e Auxiliary voltage supply The primary current transformers are con nected to the 4AM49 summation current transformer At the rated current value of either 1 A or 5 A the latter outputs a cur rent of 20 mA which is measured by the 7SD60 unit The summation current trans former is supplied together with the pro tection unit if so ordered The unit can be supplied in two different housings The one for flush mounting in a panel or cubicle has connection terminals at the rear The version for panel surface mounting is supplied with terminals accessible from the front Alternatively the unit can be sup plied with two tier terminals arranged above and below the unit LSP2002
87. dications can be subjected to a filter time indication suppression Indication filtering and delay Indications can be filtered or delayed Filtering serves to suppress brief changes in potential at the indication input The indi cation is passed on only if the indication voltage is still present after a set period of time In the event of indication delay there is a wait for a preset time The information is passed on only if the indication voltage is still present after this time Indication derivation A further indication or a command can be derived from an existing indication Group indications can also be formed The volume of information to the system interface can thus be reduced and restricted to the most important signals Transmission lockout A data transmission lockout can be acti vated so as to prevent transfer of informa tion to the control center during work on a circuit bay Test operation During commissioning all indications can be passed to an automatic control system for test purposes 7 26 Siemens BT E M E N S siemens russia com Functions With respect to communication particular emphasis has been placed on high flexibility data security and use of customary stand ards in the field of energy automation The concept of the communication modules allows interchangeability on the one hand and on the other hand is open for future standards Local PC interface The PC interface
88. e Max channel delay time 0 1 ms to 30 ms in steps of 0 1 ms or IEEE C37 94 e Protocol HDLC 7 58 Siemens Bet E M E N S siemens russia com Communication Communication possibilities between relays Ty Ty max 1 5 km 3 5 km for 62 5 125 um multi mode FO LSA4746en eps ST connectors on both sides Fig 7 65 Direct optical link up to 1 5 km 3 5 km 820 nm 7 Line Differential Protection 7SD52 53 max 24 60 100 km for 9 125 um mono mode FO LSA4747en eps LC Duplex connectors on both sides Fig 7 66 Direct optical link up to 25 60 km with 1300 nm or up to 100 km with 1550 nm Communication converter max 1 5 km for 62 5 125 um 7 y5662 0AA00 multi mode FO 820 nm e Interface Link to commu 0 nication LSA4748en eps oe device ST connectors on X21 64 128 512 kbit s or both sides G703 64 kbit s Fig 7 67 Connection to a communication network CC XG G Communication rter max 1 5 km for 62 5 125 um SYS multi mode FO 820 nm 7XV5662 0AD00 J e Interface Link to commu d o nication LSA4743en eps device ST connectors on G703 E1 2 048 kbit s or both sides G703 T1 1 544 kbit s Fig 7 68 Connection to a communication network CC 2M max 1 5 km with 62 5 um 125 um multi mode fiber IEEE C37 94 DELWON FO30 with ST connectors H SIPV6 011en eps Fig 7 69 Connection to a communication net
89. e compensation reactors G and thus allows sensitive settings to be used max G703 5 E1 2048kbit s ander load conditions 1 5 km fo 7 6703 6 T1 1554kbis rry 5 l communication S 7SD610 offers many features to reliably and e network e amp vt safely handle data exchange via communi Communication Communication 2 cation networks converter converter ke 7SD610 Wiodule 7XV5662 0AD00 7SD610 Depending on the bandwidth available a required communication converter for G703 64 kbit s or X21 64 128 512 kbit s can be selected For higher communication speed a communica tion converter with G703 E1 2 048 kbit s or G703 T1 1 554 kbit s is available Furthermore the 7SD610 supports the max 1 5 km with max 1 5 km with 62 5 um 125 um 62 5 um 125 um multi mode fiber multi mode fiber IEFE C37 94 interface with 1 2 4 and 8 mux HEommunication Mux TY r 5 va k 5 timeslots IEEE C37 94 N network 7 IEEE 37 94 2 The connection to the communication Z converter is effected via a cost effective 7SD610 FO30 with ST connectors FO30 with ST connectors 7SD610 820 nm interface with multi mode fiber This communication converter converts the optical input to electrical signals in ac Transformer cordance to the specified telecommunica tion interface 15 km overhead line Da Yd1 The fourth example shows the relays being 5 kV connected via a twisted pilot
90. e polarity so that no current flows through the pilot wire On occurrence of an internal fault different values are ob tained for the voltage drop across Rp at both ends In consequence a current I flows through the pilot wire which is measured by means of the current transformer In conjunction with the pilot wire resistance available as a parameter in the unit and the internal resistor Ra it is possible to cal culate the differential current from the mea sured current flowing through the pilot wire As soon as an adjustable value is reached the protection relay trips the line at both ends Matching of the sensitivity of the unit for different values of pilot wire resistance is effected by the firmware of the unit during parameter setting so that time consuming matching of the pilot wire resistance is unnecessary 7 Line Differential Protection 7SD60 4AM4930 summation current transformer I Pair of pilot wires max 12 km 2 2 4AM4930 summation 9 current transformer S 9 Fig 7 3 7SD60 line differential protection for operation with two pilot wires Inite Iy Line Slope 2 3 Slope 1 3 l x 34 Trip WN Setting Jp SY E 9 Ioir N Additional E restraint area S Je S 7 E K T T T T T T T T T 1 2 3 4 5 6 7 8 9 Trestraint Restraint 2
91. e units can also be used in other manu facturers systems see Fig 7 59 Via modem and service interface the pro tection engineer has access to the protec tion devices at all times This permits remote maintenance and diagnosis cyclic testing Parallel to this local communication is possible for example during a major in spection Serial protection data interface R2R interface As an option the 7 D52 53 provides one or two protection data interfaces to cover two up to six line end applications in ring or chain topology and hot standby com munication between two line ends 1 For flush mounting housing 2 For surface mounting housing In addition to the differential protection function other protection functions can use this interface to increase selectivity and sensitivity as well as covering advanced ap plications Fast phase selective teleprotection signal ing for distance protection optionally with POTT or PUTT schemes e Two and three terminal line applications can be implemented without additional logic Signaling for directional ground earth fault protection directional compari son for high resistance faults in solidly earthed systems e Echo function e Interclose command transfer with the auto reclosure Adaptive dead time ADT mode 28 remote signals for fast transfer of binary signals Flexible utilization of the communication channels by means of the programmable CEC log
92. e with multi mode FO cables A communication converter converts the optical to electrical signals This offers an interference free and isolated connection between the relay and the communication tions only CTs are necessary By con network device necting the relay to VTs the integrated main 2 distance protection can be ap plied full scheme nonswitched There fore no separate distance protection relay is required Differential relay f 7SD5 7 Mono mode FO connection typ 24 km 1300 nm gt Q GPS pulse option E o 2 GD LO S TAP line x 7SD5 differential relay E with distance ENG 2 protection D E 2 as HSS Current S transformer O Main line fe O i a 820 nm Ke max S z 1 5 km RS422 RS422 Ks X21 X21 S E e G703 1 Digital SDH _ G703 1 9 8 3 Multi gita Multi G 2 o peer S BS 5 3 GPS pulse GPS pulse option option Communication Communication converter converter Fig 7 44 Application for three line ends Ring topology Cost effective power system management The SIPROTEC 4 units are numerical re lays which also provide control and moni toring functions and therefore support the user in view of a cost effective power sys tem management The security and reli ability of power supply is increased as a result of minimizing the use of hardware The local operation has been designed according to ergon
93. ection up to 24km 1300 nm FO180 for direct connection up to 60 km 1300 nm FO19 for direct connection up to 100 km 1550 nm Relay communication equipment ST connectors Permissible fiber attenuation 8 dB For multi mode fiber 62 5 125 um ST connectors Permissible fiber attenuation 16 dB For multi mode fiber 62 5 125 um ST connectors Permissible fiber attenuation 8 dB For mono mode fiber 9 125 um LC Duplex connector Permissible fiber attenuation 13 dB For mono mode fiber 9 125 um LC Duplex connector Permissible fiber attenuation 29 dB For mono mode fiber 9 125 um LC Duplex connector Permissible fiber attenuation 29 dB External communication converter 7XV5662 0AA00 for communication networks X21 G703 64 kbit s External communication converter to interface between the relays opti cal 820 nm interface and the X21 RS422 G703 64 kbit s interface of a communication device X21 G703 RS422 selectable by jum pers Baud rate selectable by jumpers Input fiber optic 820 nm with clock recovery Output X21 RS422 electrical interface on communication device G703 64 kbit s electrical interface on communication device Max 1 5 km with 62 5 125 um multi mode FO cable to device side 64 128 512 kbit selectable by jumper max 800 m 15 pin connector 64 kbit s max 800 m screw type terminal External communication converter 7XV5662 OAD00 for communication networks with G703 E1 or G703 T1
94. ed to the received inter trip signal for this purpose Weak infeed protection echo and or trip ANSI 27 WI To prevent delayed tripping of permissive schemes during weak or zero infeed situa tions an echo function is provided If no fault detector is picked up at the weak infeed end of the line the signal received here is returned as echo to allow accelerated tripping at the strong infeed end of the line It is also possible to initiate tripping at the weak infeed end A phase selective 1 pole or 3 pole trip is issued if a permissive trip signal POTT or Unblock ing is received and if the phase earth volt age drops correspondingly As an option the weak infeed logic can be equipped ac cording to a French specification Directional ground earth fault protection for high resistance faults ANSI 50N 51N 67N In grounded earthed networks it may happen that the distance protection sensi tivity is not sufficient to detect high resis tance ground earth faults The 7SD52 53 protection relay has therefore protection functions for faults of this nature The ground earth fault overcurrent pro tection can be used with 3 definite time stages and one inverse time stage IDMT A 4 definite time stage can be applied in stead of the 1 inverse time stage Inverse time characteristics according to IEC 60255 3 and ANSI IEEE are provided see Technical data An additional loga rithmic inverse time characteristic i
95. ens SIP Edition No 6 SIEMENS siemens russia com 7 Line Differential Protection 7SD60 7 16 Siemens SEM E N S siemens russia com SIPROTEC 4 7SD61 Differential Protection Relay for Two Line Ends 7 Line Differential Protection 7SD61 LSP2247 afpen tif Fig 7 10 SIPROTEC 4 7SD61 differential protection relay The 7SD610 relay is a differential protection relay suitable for all types of applications and incorporating all those functions re quired for differential protection of lines cables and transformers Transformers and compensation coils within the differential protection zone are protected by means of integrated functions which were previously to be found only in transformer differential protection It is also well suited for complex applications such as series and parallel com pensation of lines and cables It is designed to provide differential and di rectional back up protection for all voltage levels and types of networks The relay fea tures high speed and phase selective short circuit measurement The unit is thus suit able for single phase and three phase fault clearance Digital data communication for differential current measurement is effected via fiber optic cables networks or pilot wires con nections so that the line ends can be quite far apart The serial protection data interface R2R interface of the relay can flexibly be adapted to
96. ercur rent and differential current are linked logically so that a TRIP command is given out by the differential function only when a differential current and an overcurrent coexist By this means it is often possible to avoid malfunctioning due to pilot wire short circuit or wire break of a connection be tween a current transformer and the sum mation current transformer For this purpose the 7SD60 is fitted with an addi tional differential current monitoring func tion which can effectively block the differential protection after a delay of some seconds on reaching of an adjustable value of differential current in conjunction with simultaneous operational current within the load range Saturation detector Improved stability on single ended satura tion of the primary current transformers is ensured by means of an integrated satura tion detector It provides additional stabil ity during external faults 5 ms are enough time to measure an external fault due to a high restraint and small differential cur rent Indication is done within the addi tional restraint area see Fig 7 4 If due to CT saturation the differential current flows into the trip area the differential trip is blocked for a certain time Transient sat uration of current transformers caused by decaying DC components in the short circuit current can thus be recognized As a result the requirements on the cur rent transformers are
97. ernal devices via binary input signals Auto reclosure ANSI 79 The 7SD52 53 relay is equipped with an auto reclose function AR The function includes several operating modes e 3 pole auto reclosure for all types of faults different dead times are available depending the type of fault s 1 pole auto reclosure for 1 phase faults no reclosing for multi phase faults s 1 pole auto reclosure for 1 phase faults and for 2 phase faults without earth no reclosing for multi phase faults s 1 pole auto reclosure for 1 phase and 3 pole auto reclosing for multi phase faults s 1 pole auto reclosure for 1 phase faults and 2 phase faults without earth and 3 pole auto reclosure for other faults e Multiple shot auto reclosure e Interaction with an external device for auto reclosure via binary inputs and outputs e Control of the integrated AR function by external protection e Adaptive auto reclosure Only one line end is closed after the dead time If the fault persists this line end is switched off Otherwise the other line ends are closed via a command over the communication links This avoids stress when heavy fault currents are fed from all line ends again e Interaction with the internal or an exter nal synchro check e Monitoring of the circuit breaker auxil iary contacts In addition to the above mentioned oper ating modes several other operating prin ciples can be employed by means of the integrated programmable logic CF
98. ernatively user specified trip and reset characteristics Acc to ANSI with disk emulation 0 10 to 35 00 A steps 0 01 A or deactivated stage ineffective 0 00 to 60 00 s steps 0 01 s or deactivated no trip 0 05 to 35 00 A steps 0 01 A or deactivated stage ineffective 0 00 to 60 00 s steps 0 01 s or deactivated no trip 0 10 to 35 00 A steps 0 01 A or deactivated stage ineffective 0 00 to 60 00 s steps 0 01 s or deactivated no trip 0 05 to 35 00 A steps 0 01 A or deactivated stage ineffective 0 00 to 60 00 s steps 0 01 s or deactivated no trip 0 10 to 4 00A steps 0 01 A 0 05 to 3 20 s steps 0 01 s or deactivated no trip 0 05 to 4 00 A steps 0 01 A 0 05 to 3 20 s steps 0 01 s or deactivated no trip 0 10 to 4 00A steps 0 01 A 0 50 to 15 00 s steps 0 01 s or deactivated no trip 0 05 to 4 00 A steps 0 01 A 0 50 to 15 00 s steps 0 01 s or deactivated no trip Thermal overload protection ANSI 49 Setting ranges Factor k acc to IEC 60255 8 Time constant T Temperature alarm stage Oalarm Otrip Current alarm stage Ialarm Secondary 1 A Secondary 5 A Trip time characteristic Reset ratios Oalarm GI Orip I Tatarm Tolerances Trip circuit supervision ANSI 74TC Number of supervisable trip circuits Number of required binary inputs per trip circuit Indication relay Additional functions Operational measured values Representation Curren
99. f a grounded earthed power transformer Circuit breaker Circuit breaker LSA4754en eps Fig 7 74 Alternative connection of current transformers for measuring the ground earth current of a parallel line Circuit breaker P1 P2 L LSA4760en eps Fig 7 75 Connection of current transformer with restricted earth fault protection REF Siemens SIP Edition No 6 SIEMENS slemens russla com 7 Line Differential Protection 7SD52 53 Typical connection Alternative voltage connection 3 phase voltage transformers V4 connected to broken open delta winding Ven for additional summation voltage monitoring and ground earth fault directional pro tection The current connection is effected in accordance with Fig 7 71 7 72 7 73 and 7 74 Alternative voltage connection 3 phase voltage transformers V4 connected to busbar voltage transformer for synchro check Note Any phase to phase or phase to ground earth voltage may be employed as the busbar voltage Parameterization is carried out on the unit The current con nection is effected in accordance with Fig 7 71 7 72 7 73 and 7 74 L1 L3 52 Circuit breaker IES refi LSA4756en eps Fig 7 76 Alternative connection of voltage transformers for measuri
100. fact the 7SD610 unit does not require any voltage transformers for operation of the differential protection Alternative current connection 3 phase current transformers with neutral point in the line direction I4 connected to a current transformer in the neutral point of a grounded earthed transformer for re stricted earth fault protection REF or di rectional ground earth fault protection L1 L2 L3 p1 P2 7 Line Differential Protection 7SD61 Circuit breaker LSA4755en eps Fig 7 33 Connection for transformer with restricted earth fault protection REF IE L2 L3 P1 P2 S1 52 g i Z 52 3 Circuit 4 breaker Fig 7 31 Typical connection to current transformers Circuit breaker Voltage inputs optional LSA4759en eps Fig 7 32 Typical connection to current transformers with optional voltage inputs LSA4741en eps Circuit breaker ae Fig 7 34 Alternative connection of current transformers for measuring neutral current of a grounded earthed power transformer Siemens SIP Edition No 6 SIEMENS siemens russia com 7 Line Differential Protection 7SD61 Technical data General unit data Analog inputs Rated frequency Rated current IN Rated v
101. ferential protection relay Undesired sero than the rated current within 15 ms offers tripping of the differential protection can one fast tripping time and high speed fault be suppressed by making use of the provi ase clear ance time A high speed charging l sion for introduction of a time delay on or comparison method is employed for this occurrence of single phase faults 270 function l ae e With transformers or compensation coils on 6 e When a long line or cable is switched on in the protection zone the sensitive re Ste at one end transient peaks of the charge sponse threshold Ipig gt can be blocked by C 4 z current load the line To avoid a higher an inrush detection function Like in B setting of the sensitive differ ential trip transformer differential protection it 4 2 stage this setpoint may be increased for a works with the second harmonic of the x a 5 settable time This offers greater sensitivity measured current compared with the fun l a under normal load conditions damental component Blocking is cancel EN ne e A special feature of the unit is led when an adjustable threshold value of l parameterization of the current trans the short circuit current is reached so Fig 7 13 former data The unit automatically cal that very high current faults are switched culates the necessary restraint current by off instantaneously means of the previously entered current s In the case of transformers within the transformer error The un
102. for complex applications such as series and parallel compensation of lines and cables It is designed to provide protection for all voltage levels and types of networks two line ends may lie within the protection zone The relay features very high speed and phase selective short circuit measurement The unit is thus suitable for single and three phase fault clearance The necessary restraint current for secure operation is cal culated from the current transformer data by the differential protection unit itself Digital data communication for differential current measurement is effected via fiber optic cables digital communication net works or pilot wires so that the line ends can be quite far apart Thanks to special product characteristics the relay is particu larly suitable for use in conjunction with digital communication networks Busbar The units measure the delay time in the communication network and adaptively match their measurements accordingly The units can be operated through pilot wires or twisted telephone pairs at typical distances of 8 km by means of special converters The serial communication interfaces for data transmission between the ends are re placeable by virtue of plug in modules and can easily be adapted to multi mode and mono mode fiber optic cables and to leased lines within the communication networks Secure selective and sensitive protection of two end lines can now be provided by means of t
103. g device manufacturers 7 Fig 7 22 Fig 7 23 820 nm fiber optic communication module Fiber optic Ethernet communication module for MODBUS RTU IEC 61850 with integrated Ethernet switch MODBUS RTU is an industry recognized standard for communications and is sup ported by a number of PLC and protection Telecontrol interface to Time i Operation and system control centers synchroni device manufacturers aian e g IEC 60870 5 104 zation DCF77 GPS DNP 3 0 pe er 2 DNP 3 0 Distributed Network Protocol Version 3 is a messaging based communi Substation cation protocol The SIPROTEC 4 units are eae controller fully Level 1 and Level 2 compliant with faron aus DNP 3 0 DNP 3 0 is supported by a num f i i fact ber of protection device manufacturers RS485 optical a converter RS optical RS232 aT converter a odem Modem DIGS 4 Remote control via modem DIGSI 4 Local for commissioning Fig 7 24 System solution Communications 7 28 Siemens sl E M E N S siemens russia com Communication System solutions for protection and station control Together with the SICAM power automa tion system SIPROTEC 4 can be used with PROFIBUS FMS Over the low cost electri cal RS485 bus or interference free via the optical double ring the units exchange in formation with the control system Units featuring IEC 60870 5 103 interfaces can be connected to SICAM in parallel via the RS485 bus or radially by fiber optic link Through t
104. hese relays 3 AI for lines cables AI for lines cables with transformers Restricted earth fault protection Phase selective intertrip remote trip Lockout function Three stage overcurrent protection with directional elements Instantaneous high current tripping switch onto fault Single or three pole auto reclosure with new adaptive technology Overload protection Breaker failure protection Over undervoltage protection Over underfrequency protection 3 SEP 0 RER 9 0 99 8 Trip circuit supervision a Local remote control Fig 7 11 gt Command feedback Trip circuit arc Lock 08 L AN supervision out Y HMI Communication Faul easured values modules recording VILPQ RS232 485 FO Local coso IEC61850 Va IEC60870 5 103 IVL 0 Profibus DP Remote iT DNP 3 0 7 MODBUS O O D G3 Cap p7 Eo 820mm Breaker 1 FO 1300 nm failure data S protection interface FO 1550 nm 377009 s Auto 2 lt gt reclosure Z 3 Option 7 18 Siemens sel E M E N S siemens russia com 7 Line Differential Protection 7SD61 pp 10 km 110 kV cable Typical applications employing fiber Multi mode FO 62 5 125 um 4 optic cables or communication networks Module 1 1 5 km ST connectors D a Module 2 3 5 km ST
105. his interface the system is open for the connection of units of other manu facturers see Fig 7 18 Because of the standardized interfaces SIPROTEC units can also be integrated into systems of other manufacturers or in SIMATIC Electrical RS485 or optical inter faces are available The optimum physical data transfer medium can be chosen thanks to opto electrical converters Thus the RS485 bus allows low cost wiring in the cu bicles and an interference free optical con nection to the master can be established For IEC 61850 an interoperable system so lution is offered with SICAM PAS Via the 100 Mbits s Ethernet bus the units are linked with PAS electrically or optically to the station PC The interface is standard ized thus also enabling direct connection of units of other manufacturers to the Ethernet bus With IEC 61850 however the units can also be used in other manufactur ers systems see Fig 7 19 Via modem and service interface the pro tection engineer has access to the protection devices at all times This permits remote maintenance and diagnosis cyclic testing Parallel to this local communication is pos sible for example during a major inspec tion Serial protection data interface R2R interface The 7SD610 provides one protection data interface to cover two line end applications In addition to the differential protection function other protection functions can use this interface to in
106. hout with emergency or back up overcurrent and breaker failure protection C R 5 with directional emergency or back up overcurrent protection with directional emergency or back up overcurrent and breaker failure protection Additional functions 1 4 Remote commands Transformer Voltage frequence Restricted earth fault 24 Remote indications expansions protection low impedance A a B S E a a F a J a E K B B N E E E P E E al S E o E E T without external GPS synchronisation of differential protection 0 with external GPS synchronisation of differential protection 1 1 Communication converter 7XV5662 see Accessories 2 Device for surface mounting housing Order No pos 9 F will be delivered with external repeater 7XV5461 0Bx00 3 For distances less than 25 km a set of optical attenuators 7XV5107 0AA00 must be installed to avoid saturation of the receiver element 4 For distances less than 50 km a set of optical attenuators 7XV5107 0AA00 must be installed to avoid saturation of the receiver element 5 Only available in flush mounting housing Order No pos 9 B K Siemens SIP Edition No 6 5 I E MI E N S siemens russia com 7 Line Differential Protection 7SD61 Accessories Description Opto electric communication converter CC XG connection to communication network Converter to interface to X21 or RS422 or G
107. hree pole 79 Control functions e Command and inputs for ctrl of CB and disconnectors isolators Monitoring functions e Self supervision of the relay e Trip circuit supervision 74TC e 8 oscillographic fault records e CT secondary current supervision e Event logging fault logging e Switching statistics Front design e User friendly local operation e PC front port for convenient relay setting e Function keys and 8 LEDs L local alarm Communication interfaces s serial protection data R2R interface e Front interface for PC connection e System interface IEC 61850 Ethernet IEC 60870 5 103 protocol PROFIBUS DP DNP 3 0 and MODBUS e Service modem interface rear e Time synchronization via IRIG B DCE77 or system interface Features e Browser based commissioning tool e Direct connection to digital communi Siemens SIP Edition No 6 cation networks SIEMENS siemens russia com 7 Line Differential Protection 7SD61 Application The 7SD610 relay is a differential protection relay suitable for all types of applications and incorporating all those functions re quired for differential protection of lines cables and transformers Transformers and compensation coils within the differential protection zone are protected by means of integrated functions which were previously to be found only in transformer differential protection It is also well suited
108. ial Protection 7SD61 Description DIGSI 4 Software for configuration and operation of Siemens protection units running under MS Windows Windows 2000 XP Professional device templates Comtrade Viewer electronic manual included as well as Getting started manual on paper connecting cables copper Basis Full version with license for 10 computers on CD ROM authorization by serial number Order No 7XS5400 0AA00 Professional Complete version DIGSI 4 Basis and additionally SIGRA fault record analysis CFC Editor logic editor Display Editor editor for default and control displays and DIGSI 4 Remote remote operation 7XS5402 0AA00 SIGRA 4 generally contained in DIGSI Professional but can be ordered additionally Software for graphic visualization analysis and evaluation of fault records Can also be used for fault records of devices of other manufacturers Comtrade format Running under MS Windows Windows 2000 XP Professional Incl templates electronic manual with license for 10 PCs Authorization by serial number On CD ROM 7XS5410 0AA00 Connecting cable Cable between PC notebook 9 pin connector and protection unit 9 pin connector contained in DIGSI 4 but can be ordered additionally 7XV5100 4 Manual for 7SD61 V4 6 English C53000 G1176 C145 4 Description Order No Size of Supplier Fig package Connector 2 pin C73334 A1 C35 1 1 Siemens 7 36
109. ic The protection data interfaces have differ ent options to cover new and existing com munication infrastructures s POST OMA1 module 820 nm fiber optic interface with clock recovery ST connectors for direct con nection with multi mode FO cable up to 1 5 km for the connection to a commu nication converter s FOST OMA2 module 820 nm fiber optic interface ST connec tors for direct connection up to 3 5 km with multi mode FO cable New fiber optic interfaces series FO1x s FO17 For direct connection up to 24 km 1300 nm for mono mode fiber 9 125 um LC Duplex connector s F018 For direct connection up to 60 km 1300 nm for mono mode fiber 9 125 um LC Duplex connector s FO19 For direct connection up to 100 km 1550 nm for mono mode fiber 9 125 um LC Duplex connector e FO30 820 nm fiber optic interface ST connectors for direct connection up to 1 5 km and for connections to a IEEE C37 94 multiplexer interface 3 For surface mounting housing the internal FO module OMAI will be delivered together with an external repeater The link to a multiplexed communication network is made by separate communica tion converters 7XV5662 These have a fiber optic interface with 820 nm and 2 ST connectors to the protection relay The link to the communication network is optionally an electrical X21 ora G703 E1 T1 interface Furthermore the IEEE C37 94 interface is supported by the FO30 module
110. iliary voltage and binary 3 5kV DC inputs 100 test RS485 RS232 rear side communi 500 V r m s 50 60 Hz cation interfaces and time synchronization interface 100 test Impulse voltage test type test All circuits except for communi 5 kV peak 1 2 50 us 0 5 J cation interfaces and time syn 3 positive and 3 negative impulses at chronization interface class III intervals of 5 s EMC tests for noise immunity type tests Standards IEC 60255 6 IEC 60255 22 product standards type tests EN 50082 2 generic standard DIN 57435 part 303 High frequency test 2 5 kV peak 1 MHz t 15 ms IEC 60255 22 1 class III and 400 surges per s VDE 0435 part 303 class II test duration 2 s Electrostatic discharge 8 kV contact discharge 15 kV air IEC 60255 22 2 class IV discharge both polarities 150 pF EN 61000 4 2 class IV R 330 Q Irradiation with RF field 10 V m 27 to 500 MHz non modulated IEC 60255 22 3 report class III Irradiation with RF field 10 V m 80 to 1000 MHz amplitude modulated 80 AM 1 kHz IEC 61000 4 3 class III 1 For flush mounting housing 2 For surface mounting housing 3 For surface mounting housing the internal FO module OMA1 will be delivered together with an external repeater Siemens BT E M E N S siemens russia com Technical data Irradiation with RF field pulse modulated IEC 61000 4 3 ENV 50204 class III Fast transients bursts IEC 60255 22 4 and IEC 61000 4 4 class I
111. imum current pickup Ip gt for V lt I gt V lt I gt gt Undervoltage pickup for V lt J gt and V lt I gt gt Vph e lt Vph ph lt Load angle pickup for V lt I gt gt Load angle Load angle 0 7 66 0 to 11 x 30 step 1 Grounded earthed or not grounded earthed for each winding 10 to 45 step 1 1 1 A to 25 A step 0 1 A Can be switched on and off 0 to 60 s step 0 01 s or deactivated operating up to release 6 1 of which as controlled zone all zones can be set forward or and reverse 6 for multi phase faults 3 for single phase faults 0 to 30 s or deactivated steps 0 01 s refer to ordering code quadrilateral and or Mho only impedance pickup Overcurrent pickup I gt Voltage dependent overcurrent pickup V lt I gt Voltage dependent and phase an gle dependent overcurrent pickup V lt I gt gt Impedance pickup Z lt Three pole for all types of faults Single pole for single phase faults otherwise three pole Single pole for single phase faults and two pole phase to phase faults otherwise three pole 0 to 30 s step 0 01 s or deactivated 30 to 89 step 1 30 to 90 step 1 0 05 to 600 Qaa 0 01 to 120 Q sa step 0 001 Q 0 05 to 600 Qaa 0 01 to 120 Qca step 0 00122 0 05 to 200 Qua 0 01 to 40 Qca step 0 01 Q 0 05 to 4 A aa 0 25 to 20 A a step 0 01 A 0 25 to 10 A qa 1 25 to 50 A 5a step 0 01
112. indication 1 to 170 V step 0 1 V or deactivated 2 to 220 V step 0 1 V or deactivated 1 to 220 V step 0 1 V or deactivated 2 to 220 V step 0 1 V or deactivated Local positive sequence voltage or calculated remote positive sequence voltage compounding 2 to 220 V step 0 1 V or deactivated 0 5 to 0 98 step 0 01 1 to 100 V step 0 1 V or deactivated 1 to 175 V step 0 1 V or deactivated 1 to 100 V step 0 1 V or deactivated Minimum current binary input 1 05 0 to 100 s steps 0 01 s or deactivated Approx 30 ms lt 3 of setting value or 0 5 V 1 of setting value or 10 ms 4 45 5 to 54 5 Hz in steps of 0 01 at laon 50 Hz 55 5 to 64 5 Hz in steps of 0 01 at foom 60 Hz 0 to 600 s or in steps of 0 01 s 6 to 230 V phase to ground earth Approx 80 ms Approx 80 ms Approx 20 mHz Voltage 0 V and current 0 A 12 m Hz for V 29 to 230 V 1 of the setting value or 10 ms Number of stages Pickup of current element Time delays Tliphasey T lsphase T2 Additional functions Reset time Tolerances Current limit value Time stages Auto reclosure ANSI 79 Number of auto reclosures Operating mode Operating modes with line voltage check Dead times T ph T3 phs Tseq Action times Reclaim times Start signal monitoring time Additional functions Voltage limit values for DLC ADT RDT Healthy line voltage Dead line Tolerances Time stages
113. ion has the following features e Measurements are performed separately for each phase thus the trip sensitivity is independent of the fault type An adaptive measurement method with high sensitivity for differential fault cur rents below the rated current offers the detection of highly resistive faults This trip element uses special filters which offer high security even with high level DC components in the short circuit cur rent The trip time of this stage is about 35 ms the pickup value is about 10 of the rated current s Differential and restraint current are monitored continuously during normal operation and are displayed as operational measured values High stability during external faults even with different current transformers satu ration level For an external fault only 5 ms of saturation free time are necessary to guarantee the stability of the differential protection Single phase short circuits within the protection zone can be cleared using a time delay whereas multi phase faults are cleared instantaneously Because of this function the unit is optimally suited for applications in inductively compensated networks where differential current can occur as a result of charge transfer phe nomena on occurrence of a single phase earth fault within the protection zone e A high set differential trip stage which thus resulting in undesired tripping by the clears differential fault currents higher dif
114. ions and hardware Without system interface IEC 60870 5 103 protocol electric RS232 IEC 60870 5 103 protocol electric RS485 IEC 60870 5 103 protocol optical 820 nm ST connector Further protocols see supplement L WO lW IKA 19 Lou A PROFIBUS DP slave RS485 PROFIBUS DP slave optical 820 nm double ring ST connector MODBUS RS485 MODBUS optical 820 nm ST connector 4 DNP 3 0 RS485 DNP 3 0 optical 820 nm ST connector IEC 61850 100 Mbit Ethernet electrical double RS45 connector EN 100 IEC 61850 100 Mbit Ethernet with integrated switch optical double LC connector lx l rmnlGalaa gt nH BI Binary input BO Binary output 1 Rated current 1 5 A can be selected by means of jumpers 2 Transition between the two auxiliary voltage ranges can be selected by means of jumpers 3 Setting of the BI thresholds can be made for each binary input via jumpers in 3 steps 4 Not possible for surface mounting housing Order No pos 9 F For the surface mounted version please order a device with the appropriate electrical RS485 interface and an external FO converter 5 Not possible for surface mounting housing Order No pos 9 F please order the relay with electrical interface and use a separate fiber optic switch 7 38 Siemens Ba E M E N S siemens russia com 7 Line Differential Protection 7SD61 Selection and ordering d
115. iphase Tl3phase T2 Additional functions Reset time Tolerances Current limit value Time stages Voltage protection ANSI 59 27 Operating modes Overvoltage protection Pickup values VpH Gnd gt gt VPH Gnd gt phase ground earth overvoltage Pickup values VpH pH gt gt VPH PH gt phase phase overvoltage Pickup values 3Vo gt gt 3Vo gt 3Vo can be measured via V4 trans formers or calculated by the relay zero sequence overvoltage Pickup values V1 gt gt V1 gt positive sequence overvoltage Measured voltage Pickup values V2 gt gt V2 gt negative sequence overvoltage Reset ratio settable Undervoltage protection Pickup values VpH Gna lt lt VpH Gnd lt phase ground earth undervoltage Pickup values VpH PH lt lt VpH PH lt phase phase undervoltage Pickup values Vi lt lt Vi lt positive sequence undervoltage Blocking of undervoltage protection stages Reset ratio Time delays Time delay for all over and undervoltage stages Command pickup time Tolerances Voltage limit values Time stages Frequency protection ANSI 81 Number of frequency elements Setting range Delay times Operating voltage range Pickup times 7 36 2 0 05 to 20 A 1a 0 25 to 100 A 5A step 0 01 A 0 to 30 s steps 0 01 s or deactivated CB synchronism monitoring 10 ms typical lt 3 of setting value or 1 IN 1 of setting value or 10 ms Local tripping or only indi
116. is suit able for three phase and optionally for single phase tripping by means of a sophis ticated phase selector It may be blocked during the dead time of single pole auto reclose cycles or during pickup of the dis tance protection Tele pilot protection for directional ground earth fault protection ANSI 85 67N The directional ground earth fault overcurrent protection can be combined with one of the following teleprotection schemes e Directional comparison s BLOCKING e UNBLOCKING The transient blocking function current reversal guard is also provided in order to suppress interference signals during trip ping of parallel lines The pilot functions for distance protection and for ground earth fault protection can use the same signaling channel or two sep arate and redundant channels Backup overcurrent protection ANSI 50 50N 51 51N The 7SD52 53 provides a backup over current protection Two definite time stages and one inverse time stage IDMTL are available separately for phase currents and for the neutral residual current Two operating modes are selectable The func tion can run in parallel to the differential 7 Line Differential Protection 7SD52 53 T s LSA2185 agpen eps per HE i 1 1 P Fig 7 55 Normal inverse protection and the distance protection or only during interrup
117. it thus adap protection zone vector group adaptation tively matches the working point on the and matching of different current trans tripping characteristic so that it is no lon former ratios is carried out within the get necessary for the user to enter charac unit The interference zero current which teristic settings flows through the earthed winding is e Different current transformer ratios may eliminated from the differential current be employed at the ends of the line measurement The 7SD610 thus behaves A mismatch of 1 8 is permissible like a transformer differential relay whose s Differential protection tripping can be ends however can be quite far apart guarded with overcurrent pickup In this e A more sensitive protection for trans case pickup of the protection relay is ini formers within the protection zone is tiated only on simultaneous presence of given by measurement of the star point differential current and overcurrent current on an earthed winding Therefore e Easy to set tripping characteristic Because the Ig current measurement input has to the relay works adaptively only the set be used point Jpige gt sensitive stage and Ipig gt gt high set current differential stage must be set according to the charge current of the line cable 7 20 Siemens Bet E M E N S siemens russia com Protection functions If the sum of the phase currents of a wind ing is compared with the measured star point current a sen
118. ith the remote station via a two pilot wire link It is connected to the primary current trans formers via an external summation current transformer The unit operates internally on the summated current taken from the sec ondary side of the summation current transformer The link to the remote station is realized by means of a pair of symmetrical pilot wires allowing distances of up to ap proximately 12 km Adaptation to the pi lot wire resistance is effected by means of software within the unit Therefore match ing is not necessary The primary field of application of the unit is protection of short overhead lines and ca bles with two line ends However trans formers and reactors may be located within the protection zone The unit can be fitted with inrush restraint in such cases A differ ential protection instantaneous tripping stage is also provided in this case Vector group adaptation is not effected inside the unit and must if necessary be effected by means of a matching current transformer The 7SD60 can be fitted with a pilot wire monitoring function In addition to moni toring the pilot wire link to the remote sta tion this also includes bidirectional circuit breaker intertripping and a remote tripping command If the differential protection becomes inac tive due to a pilot wire failure the relay has an emergency overcurrent function as an option It includes one definite time overcurrent stage and can be
119. ith with 7 Protection interface 2 FOS Optical 820 nm 2 ST plugs line length up to 1 5 km via multimode FO cable for communication converter or direct FO connection A FO6 Optical 820 nm 2 ST plugs line length up to 3 5 km via multimode FO cable for direct FO connection B FO17 Optical 1300 nm LC Duplex plugs line length up to 24 km via monomode FO cable for direct FO connection 7 G FO18 Optical 1300 nm LC Duplex plugs line length up to 60 km via monomode FO cable for direct FO connection 2 H FO19 Optical 1550 nm LC Duplex plugs line length up to 100 km via monomode FO cable for direct FO connection 4 J FO 30 Optical 820 nm 2 ST plugs line length up to 1 5 km via multimode FO cable for communication networks with IEEE C37 94 interface or direct FO connection 7 S 1 Communication converter 7XV5662 see Accessories 2 Device for surface mounting housing Order No pos 9 E G H Q R will be delivered with external repeater 7XV5461 0Bx00 3 For distances less than 25 km a set of optical attenuators 7XV5107 0AA00 must be installed to avoid saturation of the receiver element 4 For distances less than 50 km a set of optical attenuators 7XV5107 OAA00 must be installed to avoid saturation of the receiver element 5 Only available in flush mounting housing Order No pos 9 4 E E G H Q R 7 74 Siemens Bet E M E N S siemens russia com 7 Line Differential Protection 7SD52 53
120. ium voltage or high voltage substations The main application is reliable control of switching and other processes The status of primary equipment or auxil iary devices can be obtained from auxiliary contacts and communicated via binary in puts Therefore it is possible to detect and indicate both the OPEN and CLOSED posi tion or a fault or intermediate circuit breaker or auxiliary contact position The switchgear or circuit breaker can be controlled via integrated operator panel binary inputs substation control and protection system DIGSI 4 Command processing All the functionality of command process ing is offered This includes the processing of single and double commands with or without feedback sophisticated monitoring of the control hardware and software checking of the external process control ac tions using functions such as runtime moni toring and automatic command termination after output Here are some typical applications Single and double commands using 1 1 plus 1 common or 2 trip contacts e User definable bay interlocks Operating sequences combining several switching operations such as control of circuit breakers disconnectors and earthing switches e Triggering of switching operations indi cations or alarm by combination with existing information Automation user defined logic With integrated logic the user can set via a graphic interface CFC specific functio
121. maintenance reasons by a signal via binary input Checks for the breaker position and load current are made before this logout is ini tiated In a chain topology the relays at the end of the line can be logged out from the differential protection topology The whole configuration can be set up into a test mode All functions and indi cations are available except the breakers are not tripped The local relay can be tested and no trip or intertrip reaction is effected by the other relays Chain topology Terminal 2 7SD522 Ast d 1341 7SD522 523 Terminal 3 Connection to a other device Jt tern 1 7SD523 Intermediate summation Fig 7 50 Differential protection in ring or chain topology 7 48 Siemens ISl E M E N S siemens russia com Protection functions Distance protection ANSI 21 21N 7SD52 53 provides a non switched dis tance protection featuring all well proven algogrithms of 7SA522 and 7SA6 It is pos sible to select the operating mode main or main 2 if the back up differential is activated as main 1 By parallel calcula tion and monitoring of all six impedance loops a high degree of sensitivity and se lectivity is achieved for all types of faults The shortest tripping time is less than one cycle All methods of neutral point con nection resonant earthing isolated solid or low resistance earthing are reliably dealt with Single and three pole
122. missioning aid via a standard Web browser Substation controller In the case of the 7SD610 a PC with a stan dard browser can be connected to the local PC interface or to the service interface refer to Commissioning program The relays include a small Web server and sends its HTML pages to the browser via an estab lished dial up network connection Retrofitting Modules for every type of communication Communication modules for retrofitting are available for the entire SIPROTEC 4 unit range These ensure that where different communication interfaces electrical or op tical and protocols IEC 61850 Ethernet IEC 60870 5 103 PROFIBUS DP DNP 3 0 MODBUS DIGSI etc are required such demands can be met LSA2253 bgpen eps Fig 7 18 IEC 60870 5 103 star type RS232 copper conductor connection or fiber optic connection Safe bus architecture S S J G PAS s RS485 bus With this data transmission via copper conductors electromagnetic fault influ ences are largely eliminated by the use of twisted pair conductor Upon failure of a unit the remaining system continues to operate without any disturbances xX Switch Fiber optic double ring circuit The fiber optic double ring circuit is im mune to electromagnetic interference Upon failure of a section between two units the communication system contin ues to operate without disturbance o a oO c D D o 2 2 L a a I
123. nal communication converter 7XV5662 OAD00 for communication networks with G703 E1 or G703 T1 External communication converter to interface between the relays optical 820 nm interface and G703 E1 or G703 T1 interface of a communica tion network Inputs 2 fiber optic inputs 820 nm Max 1 5 km with 62 5 125m 1RS232 input multi mode 1 FO cable to device side Output 67035 E1 2 048 kbit s G703 6 T1 1 554 kbit s Electrical interface on communica max 800 m screw type terminal tion network 7 64 External communication converter 7XV5662 0AC00 for pilot wires External communication converter to interface between relays optical 820 nm interface and a pilot wire or twisted telephone pair Typical distance 15 km Fiber optic 820 nm with clock Max 1 5 km with 62 5 125 um recovery multi mode FO cable Pilot wire Screw type terminal 5 kV isolated Permissible time delay duration of data transmission Delay of telegrams due to trans Max 30 ms per transmission path mission for one unit to the other Permissible max value can be Delay is constantly measuredand selected adjusted Electrical tests Specifications Standards IEC 60255 product standards ANSI TEEE C37 90 0 1 2 UL 508 For further standards see Individual functions Insulation tests Standards TEC 60255 5 Voltage test 100 test All circuits except for auxiliary 2 5 kV r m s 50 60 Hz supply binary inputs and communication interfaces Aux
124. nals on the side or on top bottom Flush mounting housing 7 7 7 7 7 Co 2 5 T 1 Pilot wire connection 1 1 Ra PO 1 j Fo T O Is i PWM Summation c t 1 r ne i connection l h z lt z 6 i 8 woe 71 5 Ir 5 fi 4 S we 12 3 3 Ta COMMAND RELAY i 16 i 7 6 K5 5 INPUT 5 1 14 _K1 TRIP command S 4 ae L Block differential prot 7 KO gt 3 5 E1 l B11 ah 2 K8 17_K2 TRIP d L RESET Lockout 9 L 7 ai E2 to B 2 ALARM RELAY L RESET LED mh Al Wr l K4 20 M3 Lockout active tes 12 B13 20 me r 19 5 i 24 L Power supply 30 r I 24 30 K1 23 M2 Disturbance pilot wire 27 L Vaux 31 N 59 23 i 22 A gt e e a 29 1 RS485 o 26 26 29 m i K3 z 25 M1 Device ready B 28 25 28 Y 00 37 GND 27 Capacitors of the relay i a outputs to avoid disturbances i are made of ceramic a 5 2 i 4 7 nF gt 250V 1 a U 2 S z lt z 2 E Fig 7 9 Connection diagram of the 7SD60 current differential protection Siem
125. ng Pilot wire comparison Unblocking Blocking Echo function refer to weak infeed function Transient blocking for schemes with measuring range extension Phase selective signals available for maximum selectivity with single pole tripping signals for 2 and 3 end lines Alternatively with or without auto reclosure 0 to 30 s step 0 01 s or deactivated 1 of setting value or 10 ms Backup overcurrent protection ANSI 50N 51N Operating modes Characteristics Definite time stage ANSI 50 50N Pickup definite time stage 1 phase current Pickup definite time stage 1 neutral residual current Pickup definite time stage 2 phase current Pickup definite time stage 2 neutral residual current Pickup definite time stage 3 phase current Pickup definite time stage 3 neutral residual current Time delay for definite time stages Tolerances Current pickup Delay times Operating time Siemens SIP Edition No 6 Active only with loss of data connection and voltage or always active 3 definite time stages 1 inverse time stage 0 1 to 25 A qa 0 5 to 125 A 5 step 0 01 A or deactivated 0 5 to 25 A 1a 0 25 to 125 A 5a step 0 01 A or deactivated 0 1 to 25 A a 0 5 to 125 A 5A step 0 01 A or deactivated 0 05 to 25 A qa 0 25 to 125 A sa step 0 01 A or deactivated 0 1 to 25 A qa 0 5 to 125 A 5a step 0 01 A or deactivated 0 05 to 25 A qa 0 25 to 125 A s
126. ng the displacement voltage e n voltage 52 Circuit breaker LSA4757en eps Fig 7 77 Alternative connection of voltage transformers for measuring the busbar voltage 7 62 Siemens BT E M E N S siemens russia com Technical data General unit data Analog inputs Rated frequency Rated current In Rated voltage Power consumption In CT circuits with Iy 1A In CT circuits with In 5 A In VT circuits Thermal overload capacity In CT circuits In VT circuits Dynamic overload capacity In CT circuits In the CT circuit for high sensitive earth fault protection refer to ordering code Auxiliary voltage Rated voltage Permissible tolerance Max superimposed AC voltage peak to peak Power consumption During normal operation During pickup with all inputs and outputs activated Bridging time during auxiliary voltage failure Vaux 110 V AC DC Binary inputs Quantity Function can be assigned Minimum permissible voltage Range is selectable with jumpers for each binary input Maximum permissible voltage Current consumption energized Output relays Quantity Function can be assigned Switching capacity Make Break Break for resistive load Break for t L R lt 50 ms Switching voltage Permissible current 50 or 60 Hz selectable 1 or 5A selectable controlled by firmware 80 to 125 V selectable Approx 0 05 VA
127. ns for the automation of switchgear or substa tion Functions are activated via function keys binary input or via communication interface Switching authority Switching authority is determined accord ing to parameters communication or by key operated switch when available If a source is set to LOCAL only local switching operations are possible The fol lowing sequence of switching authority is laid down LOCAL DIGSI PC program REMOTE Every switching operation and change of breaker position is kept in the status indica tion memory The switch command source switching device cause i e spontaneous change or command and result of a switch ing operation are retained Assignment of feedback to command The positions of the circuit breaker or switching devices and transformer taps are acquired by feedback These indication in puts are logically assigned to the corre sponding command outputs The unit can therefore distinguish whether the indication change is a consequence of switching opera tion or whether it is a spontaneous change of state intermediate position Chatter disable The chatter disable feature evaluates whether in a configured period of time the number of status changes of indication in put exceeds a specified figure If exceeded the indication input is blocked for a certain period so that the event list will not record excessive operations Filter time All binary in
128. ns to a IEEE C37 94 multiplexer interface The link to a multiplexed communication network is made by separate communica tion converters 7XV5662 These have a fiber optic interface with 820 nm and 2 ST connectors to the protection relay The link to the communication network is option ally an electrical X21 G703 64 kbit s or G703 E1 T1 interface Furthermore the IEEE C37 94 interface is supported by the FO30 module For operation via copper wire communica tion pilot wires or twisted telephone pair a modern communication converter for copper cables is available This operates with both the two wire and three wire copper connections which were used by conven tional differential protection systems before The communication converter for copper cables is designed for 5 kV insulation volt age An additional 20 kV isolation trans former can extend the field of applications 7 Line Differential Protection 7SD61 of this technique into ranges with higher insulation voltage requirements The con nection via FO cable to the relay is interfer ence free With SIPROTEC 4 and the com munication converter for copper cables a digital follow up technique is available for two wire protection systems up to 8 km and all three wire protection systems using existing copper communication links Different communication converters are listed under Accessories Communication data s 32 bit CRC check according to CCITT an
129. nsformer with normal sensitivity refer to ordering data position 7 0 003 to 4 A 1a 0 015 to 20 A sa step 0 001 A Neutral residual current transformer with high sensitivity refer to ordering data position 7 Normal inverse very inverse extremely inverse long inverse Inverse short inverse long inverse moderately inverse very inverse extremely inverse definite inverse 310 eee 310P 310 1 1 to 4 0 x I I step 0 1 s Tp 0 05 to 3 s step 0 01 s t T 310 Pmax Dio 0 5 to 15 s step 0 01 s Approx 1 1 x lil ANSI I Ip M 1 1 to 4 0 x llur step 0 1 Approx 1 05 x I Iop ANSI I Ip M lt 5 of setpoint 15 ms Zero sequence voltage protection Voinverse Tripping characteristic p S Vo Verran 4 Direction decision ANSI 67N Measured signals for direction deci 3I and 3Vo or sion 3Io and 3Vo and Iy star point current of an earthed power transformer or 3h and 3V2 negative sequence system or zero sequence power Sr or automatic selection of zero sequence or negative sequence quantities de pendent on the magnitude of the com ponent voltages 0 5 to 10 V step 0 1 V 0 05 to 1 A qa 0 25 to 5 A 5a step 0 01 A Min zero sequence voltage 3Vo Min current Jy of grounded earthed transformers Min negative sequence voltage 3V2 0 5 to 10 V step 0 1 V 0 05 to 1 A 1a 0 25 to 5 A Ga step 0 01 A Inrush current blocking capable of being activated fo
130. ntial current re ferred to the fundamental frequency exceeds a preset value tripping by the dif ferential protection is blocked In the case of high current internal faults whose am plitude exceeds the inrush current peak tripping can be carried out instanta neously Vector group adaptation is not effected in side the unit and must where necessary be brought about by means of an external matching transformer scheme 7 6 Siemens ISl E M E N S siemens russia com Features Serial data transmission As standard the unit is fitted with an RS485 interface This is suitable for con nection to a bus and allows up to 32 de vices to be connected via a two wire serial interface use of a third core for earth is recommended A PC is connected via this interface using an RS232 lt gt RS485 con verter thus allowing the DIGSI operator program to be used by means of which PC aided planning parameter setting and evaluation can be performed By this read out it is also possible to output the fault recordings stored by the unit on occur rence of faults Using an RS485 lt 9820 nm optical converter as an accessory 7XV5650 7XV5651 it is possible to provide an in terference free and isolated link to a cen tral control system or a remote control system employing DIGSI thus allowing economically viable configurations to be used e g for remote diagnostics The serial interface can also be set to the IEC 60870 5
131. ntrol displays and DIGSI 4 Remote remote operation 7XS5402 0AA00 SIGRA 4 generally contained in DIGSI Professional but can be ordered additionally Software for graphic visualization analysis and evaluation of fault records Can also be used for fault records of devices of other manufacturers Comtrade format Running under MS Windows Windows 2000 or XP Professional Incl templates electronic manual with license for 10 PCs Authorization by serial number On CD ROM 7XS5410 0AA00 Connecting cable Cable between PC notebook 9 pin connector and protection unit 9 pin connector contained in DIGSI 4 but can be ordered additionally 7XV5100 4 Manual for 7SD522 523 V4 6 English C53000 G1176 C169 Description Order No Size of Supplier Fig package Connector 2 pin C73334 A1 C35 1 1 Siemens 7 79 3 pin C73334 A1 C36 1 1 Siemens 7 80 Crimp CI2 0 5 to 1 mm 0 827039 1 4000 AMP connector 0 827396 1 1 AMP CD 1 to 2 5 mm 0 827040 1 4000 AMP 0 827397 1 AMP Type III 0 75 to 1 5 mm 0 163083 7 4000 AMP 0 163084 2 1 AMP Crimping For Type I 0 539635 1 1 AMP tool and matching female 0 539668 2 AMP For CI2 0 734372 1 1 AMP and matching female 1 734387 1 AMP 19 mounting rail C73165 A63 D200 1 1 Siemens 7178 Short circuit links For current terminals 73334 A1 C33 1 1 Siemens 7 81 For other terminals C73334 A1 C34 1 1 Siemens 7 82 Safety cover for terminals large C73334 A1 C31 1
132. ocal relay and are dis played in the relay with DIGSI 4 or with the Web Monitor The operational and fault events and fault records from all line ends share a common time tagging which allows to compare events registered in the different line ends on a common time base In addition to the universal DIGS 4 operat ing program the relay contains a WEB server that can be accessed via a telecommu nication link using a browser e g Internet Explorer The advantage of this solution is to operate the unit with standard software tools and at the same time make use of the Intranet Internet infrastructure This pro gram shows the protection topology and comprehensive measurements from local and remote line ends Local and remote measurements are shown as phasors and the breaker positions of each line end are de picted It is possible to check the correct connection of the current transformers or the correct vector group of a transformer 7 Line Differential Protection 7SD61 o pae Bask Kaut Eavorten Extras 2 Ouwa O x 2 eRwan ien n TI e C R JB Adkogse E hetp i 141 142 295 150 EJ wedh a Links Remote Measurement Currents Voltages l L I p u gor p u oot Local Address 1 m iLa 99 67 0 0 VLIEL 10003 05 me LE 99 89 120 0 VL2EL 100 05 120 6 IL3L 99 84 120 5 VL3EL 100 07 120 0 Remote Address 2 ILIR 100 06 180 0 VLIER 99 97 05 IL2R 99 94 60 0
133. of the maxi mum permissible delay time is included Generation of alarms on heavily dis turbed communication links Faulty telegram counters are available as operational measurement With a GPS high precision 1 s pulse from a GPS receiver the relays can be synchro nized with an absolute exact time at each line end In this way the delay in the re ceive and transmit path can be measured exactly With this optional feature the relay can be used in communication networks where this delay times are quite different Siemens SIP Edition No 6 SIEMENS siemens russia com 7 Line Differential Protection 7SD52 53 Protection functions Phase selective intertrip and remote trip indications Normally the differential fault current is calculated for each line end nearly at the same time This leads to fast and uniform tripping times Under weak infeed condi tions especially when the differential func tion is combined with an overcurrent pickup a phase selective intertrip offers a tripping of all line ends e 78D52 53 has 4 intertrip signals which are transmitted in high speed lt 20 ms to the other line ends These intertrip signals can also be initiated by an external relay via binary inputs and therefore be used to indicate for example a directional deci sion of the backup distance relay s In addition 4 high speed remote trip sig nals are available which may be initiated by an external or inte
134. oltage VN Power consumption in CT circuits with Iy 1 A with IN 5A in VT circuits Thermal overload capacity in CT circuits for IN 5 A Dynamic peak value In VT circuits for highly sensitive earth fault protection in VT circuits Auxiliary voltage Rated voltages Ranges are settable by means of jumpers Permissible tolerance Superimposed AC voltage peak to peak Power consumption Under normal operating conditions During pickup with all inputs and outputs activated Bridging time during failure of the auxiliary voltage Vaux 2 110 V Binary inputs Number Rated voltage range Pickup threshold Functions are freely assignable Minimum pickup threshold Ranges are settable by means of jumpers for each binary input Maximum permissible voltage Current consumption energized Output relay Command indication relay Number Switching capacity Make Break Break with resistive load Break with L R lt 50 ms Switching voltage Permissible total current 50 or 60 Hz selectable 1 or 5 A selectable 80 to 125 V selectable Approx 0 05 VA Approx 0 3 VA Approx 0 1 VA In 100 A for 1 s 30 IN for 10 s 4 In continuous 250 IN half sine 300 A for 1s 100 A for 10 s 15 A continuous 230 V per phase continuous 24 to 48 V DC 60 to 125 V DC 110 to 250 V DC and 115 V AC 50 60 Hz 20 to 20 15 Approx 8 W Approx 18 W 50 ms 7 marshallable 24 to 250
135. omic criteria Large easy to read backlit displays are provided The SIPROTEC 4 units have a uniform design and a degree of functionality which represents a benchmark level of perfor mance in protection and control If the requirements for protection control or interlocking change it is possible in the majority of cases to implement such changes by means of parameterization using DIGSI 4 without having to change the hardware The use of powerful microcontrollers and the application of digital measured value conditioning and processing largely sup presses the influence of higher frequency transients harmonics and DC compo nents Siemens SIP Edition No 6 SIEMENS siemens russia com 7 Line Differential Protection 7SD52 53 Construction Connection techniques and housing with many advantages 1 3 1 2 2 3 and 1 1 rack sizes These are the available housing widths of the 7SD52 53 relays referred to a 19 mod ule frame system This means that previous models can always be replaced The height is a uniform 245 mm for flush mounting housings and 266 mm for surface mount ing housings for all housing widths All ca bles can be connected with or without ring lugs Plug in terminals are available as an option It is thus possible to employ pre fabricated cable harnesses In the case of surface mounting on a panel the connec tion terminals are located above and below in the form of screw type termin
136. onfiguration of binary outputs until Hardware version EE For advanced flexibility see Fig 7 87 7 Line Differential Protection 7SD52 53 Surface mounting housing Flush mounting housing 50 Q1 100 Q2 45 R15 3E 95 R16 e T K5 73 Fast BO1 i K6 23 Fast BO2 K7 72 Fast BO3 K8 22 F BO4 Ti K9 71 ani K10 21 Fast BOD K13 69 Fast BO6 K14 19 K15 68 Fast BO7 1 K16 18 ROST HRI 49 Bog R2 99 B0100 R3 48 B011 R4 98 R5 197 B0120 LT R6 47 R7 96 B013 R8 46 u R9 95 eis R10 45 LR11 94 B015 R12 44 BO16 i P3 90 NC or NO m i with Jumper oS jj P4 140 BO17 BO18 BO19 BO20 1 P10 37 BO21 BO22 P15 84 BO23 P16 34 Live status p LTK 74 contact et NC or NO Lo with Jumper m K4 24 Power 37 supply 38 Serial S interfaces 1 n 3 Fig 7 86 Medium version in housing 1 1 x 19 Siemens SIP Edition No 6 SIEMENS siemens russia com 7 Line Differen
137. onitoring functions e Self supervision of relay and protection data R2R communication s Trip circuit supervision 74TC e Measured value supervision e Oscillographic fault recording e Event logging fault logging e Switching statistics Front design User friendly local operation e PC front port for relay setting e Function keys and 14 LEDs f local alarm Communication interfaces s 2 serial protection data R2R interfaces for ring and chain topology e Front interface for connecting a PC e System interface for connection to a control system via various protocols IEC 61850 Ethernet IEC 60870 5 103 PROFIBUS FMS DP and DNP 3 0 e Rear side service modem interface e Time synchronization via IRIG B or DCE77 or system interface Siemens SIP Edition No 6 SIEMENS siemens russia com 7 Line Differential Protection 7SD52 53 Application ANSI A I for lines cables Instantaneous high current tripping switch onto fault 87T A I for lines cables Overvoltage undervoltage with transformers protection 810 U Low impedance restricted earth fault protection for transformers Over underfrequency protec tion Phase selective intertrip remote trip Synchro check Lockout function Single or three pole auto reclosure with new adaptive technology Distance protection Overload protection Fault locator Breaker f
138. ono mode FO cable LC Duplex connector 60 km Protection data interface mod opt 1550 nm mono mode FO cable LC Duplex connector 100 km Protection data interface mod opt 820 nm multi mode FO cable ST connector 1 5 km support of IEEE C37 94 C 53207 A351 D655 1 C53207 A351 D656 1 C53207 A351 D657 1 C53207 A351 D658 1 Optical repeate Serial repeater 2 channel opt 1300 nm mono mode FO cable LC Duplex connector 24 km Serial repeater 2 channel opt 1300 nm mono mode FO cable LC Duplex connector 60 km Serial repeater 2 channel opt 1550 nm mono mode FO cable LC Duplex connector 100 km a 7XV5461 OBGOO 7XV5461 OBHOO 7XV5461 0BJOO Time synchronizing unit with GPS output GPS 1 sec pulse and time telegram IRIG B DCF 77 7XV5664 0AA00 Isolation transformer 20 kV for pilot wire communication 7XR9516 Voltage transformer miniature circuit breaker Rated current 1 6 A thermal overload release 1 6 A overcurrent trip 6 A 3RV1611 1AG14 7 40 Siemens sl E M E N S siemens russia com Accessories LSP2089 afpen tif Fig 7 35 Mounting rail for 19 rack LSP2090 afpen eps Fig 7 36 2 pin connector E 5 5 NY A S O Fig 7 38 Short circuit link for current terminals LSP2091 afpen eps Fig 7 37 3 pin connector LSP2092 afpen eps Fig 7 39 Short circuit link for voltage terminals indications terminals 7 Line Different
139. op Tripping characteristics acc to IEC 60255 3 ANSI IEEE tripping characteristic not for region DE refer to ordering data position 10 Inverse logarithmic tripping charac teristics not for regions DE and US refer to ordering data position 10 Pickup threshold Time multiplier for IEC T character istics Time multiplier for ANSI D charac teristics Pickup threshold Inverse logarithmic pickup threshold Reset threshold Tolerance Operating time for 2 lt I lt 20 7 68 0 5 to 25 A 1a 2 5 to 125 A 5A step 0 01 A 0 2 to 25 A 1a 1 to 125 A 5a step 0 01 A 0 05 to 25 A 14 0 25 to 125 A sa step 0 01 A Neutral residual current transformer with normal sensitivity refer to ordering data position 7 0 003 to 25 A aa 0 015 to 125 A say step 0 001 A Neutral residual current transformer with high sensitivity refer to ordering data position 7 0 05 to 25 A 1a 0 25 to 125 A sa step 0 01 A Neutral residual current transformer with normal sensitivity refer to order ing data position 7 0 003 to 25 A aa 0 015 to 125 A Ga step 0 001 A Neutral residual current transformer with high sensitivity refer to ordering data position 7 0 to 30 s step 0 01 s or deactivated lt 3 of setting value or 1 In 1 of setting value or 10 ms Approx 30 ms Approx 40 ms 0 05 to 4 A 1a 0 25 to 20 A 5a step 0 01 A Neutral residual current tra
140. or distances less than 25 km a set of optical attenuators 7XV5107 0AA00 must be installed to avoid saturation of the receiver element For distances less than 50 km a set of optical attenuators 7XV5107 0AA00 must be installed to avoid saturation of the receiver element Only available in flush mounting housing Order No pos 9 E G H Q R Siemens SIP Edition No 6 SIEMENS siemens russia com 7 Line Differential Protection 7SD52 53 Selection and ordering data Description Order No Short code 7SD5 combined multi end line differential protection 75D52 DD DODDD gao DDD with distance protection continued Functions 1 Protection data interface 2 A t t t AAA Trip mode Auto reclosure ANSI 79 see next Synchrocheck ANSI 25 page 3 pole without without 0 3 pole with without 1 1 3 pole without without 2 1 3 pole with without 3 3 pole without with 4 3 pole with with 5 1 3 pole without with 6 1 3 pole with with Z With protection data interface 2 see additional specification N Relays Ord No 6 2 are available with a second protection data interface Hot Standby 9 N 00 l AA Functions 1 Trip mode Auto reclosure ANSI 79 Synchrocheck ANSI 25 3 pole without without 0 3 pole with without 1 1 3 pole without without 2 1 3 pole with without 3 3 pole without with 4 3 pole with with 5 1 3 pole without with 6 1 3 pole w
141. or the differential calculations are cyclically exchanged in full duplex mode in form of synchronous serial telegrams between the protection units The telegrams are secured with CRC check sums so that transmission errors in a communication network are immediately detected 7 Line Differential Protection 7SD52 53 Restraint Differential Ipit current Iy operation Tripping 06 area I I I 0 44 I I 1 I area 2 Di f 7 2 S 2 Z X es Adaptive restraint S stabilization E T T 0 2 0 4 0 6 Trestraint gt In operation Fig 7 49 Tripping characteristic e Data communication is immune to electromagnetic interference because fiber optic cables are employed in the critical region Supervision of each individual incoming telegram and of the entire communica tion path between the units without additional equipment Unambiguous identification of each unit is ensured by assignment of a settable communication address within a differ ential protection topology Only those units mutually known to each other can cooperate Incorrect interconnection of the communication links results in blocking of the protection system Detection of reflected telegrams in the communication system Detection of delay time changes in communication networks Measurement of the delay time to the remote line ends with dynamic compen sation of the delay in the differential measurement Supervision
142. ot wires 7 Line Differential Protection 7SD52 53 Further additional functions Measurement supervision Annunciations Event logging Fault logging Switching statistics Circuit breaker test Setting range Dead time for CB TRIP CLOSE cycle Commissioning support CE conformity Current sum Current symmetry Voltage sum Voltage symmetry Voltage phase sequence Fuse failure monitor Buffer size 200 Storage of signals of the last 8 faults buffer size 800 Number of breaking operations per c b pole Sum of breaking current per phase Breaking current of last trip operation Max breaking current per phase TRIP CLOSE cycle 3 phase TRIP CLOSE cycle per phase 0 00 to 30 s step 0 01 s 0 00 to 30 s step 0 01 s Operational measured values Circuit breaker test Read binary test Initiate binary inputs Set binary outputs Set serial interface outputs Lockout of a device Test mode ot the differential protection topology This product is in conformity with the Directives of the European Commu nities on the harmonization of the laws of the Member States relating to electromagnetic compatibility EMC Council Directive 89 336 EEC and electrical equipment designed for use within certain voltage limits Council Directive 73 23 EEC This unit conforms to the international standard IEC 60255 and the Ger man standard DIN 57435 Part 303 corresponding to VDE 0435 Part 303 Further applicable stan
143. out feedback sophisticated monitor ing of the control hardware and software checking of the external process control actions using functions such as runtime monitoring and automatic command ter mination after output Here are some typi cal applications e Single and double commands using 1 1 plus 1 common or 2 trip contacts e User definable bay interlocks Operating sequences combining several switching operations such as control of circuit breakers disconnectors and earthing switches Triggering of switching operations indi cations or alarm by combination with existing information Automation user defined logic With integrated logic the user can set via a graphic interface CFC specific functions for the automation of switchgear or substa tion Functions are activated via function keys binary input or via communication interface Switching authority Switching authority is determined accord ing to parameters communication or by key operated switch when available If a source is set to LOCAL only local switching operations are possible The fol lowing sequence of switching authority is laid down LOCAL DIGSI PC program REMOTE Every switching operation and change of breaker position is kept in the status indi cation memory The switch command source switching device cause i e spon taneous change or command and result of a switching operation are retained Assignment of fee
144. p 3Iop T310P Inverse time stages Ip Acc to ANSI Dip 3Iop D310P 0 10 to 4 00 A T steps 0 01 A 0 05 to 3 20 s steps 0 01 s or deactivated no trip 0 05 to 4 00A steps 0 01 A 0 05 to 3 20 s steps 0 01 s or deactivated no trip 0 10 to 4 00A steps 0 01 A 0 50 to 15 00 s steps 0 01 s or deactivated no trip 0 05 to 4 00A steps 0 01 A 0 50 to 15 00 s steps 0 01 s or deactivated no trip Thermal overload protection ANSI 49 Setting range Factor k to IEC 60255 8 Time constant T Thermal alarm stage OAlarm Otrip Current based alarm stage lann Calculating mode for overtemperature Pickup time characteristic Reset ratio O Oatarm G OTrip T Iatarm Tolerances Additional functions Operational measured values Representation Currents Tolerances 10 to 50 In 50 to 200 IN Voltages Tolerances 10 to 50 Vn 50 to 200 VN Power with direction indication Tolerances P for cos g 0 7 to 1 and V Vy I IN 50 to 120 Q for sin 0 7 to 1 and V Vy T In 50 to 120 S for V Vy I IN 50 to 120 Frequency Tolerance gt Power factor Tolerance for l cos l 0 7to1 Remote measurements Overload measured values Siemens SIP Edition No 6 0 1 to 4 steps 0 01 1 to 999 9 min steps 0 1 min 50 to 100 referred to tripping tem perature steps 1 0 1 to 4 Aqa 0 5 to 5 A 5A steps 0 01 A Omax Omean O with Imax Do t TlIn a
145. p 1 With sound phase polarization and or voltage memory Dynamically unlimited For sinusodial quantities AX lt 5 for 30 lt Msc lt 90 X e 5 for 0 lt sc lt 60 R AZ lt 5 for 30 lt Qsc Prine S 30 lt 5 of setting value Sae 1 of set value or 10 ms Approx 17 ms at 50 Hz Approx 15 ms at 60 Hz Approx 12 ms at 50 Hz Approx 10 ms at 60 Hz Approx 30 ms 1 Secondary data for Iy 1 A with I 5 A the values must be multiplied Siemens BT E M E N S siemens russia com Technical data Power swing detection ANSI 68 68T Power swing detection principle Max detectable power swing fre quency Operating modes Power swing blocking programs Detection of faults during power swing blocking Measurement of the rate of imped ance vector change and monitoring of the vector path Approx 7 Hz Power swing blocking and or power swing tripping out of step tripping All zones blocked Z1 Z1B blocked Z2 to Z5 blocked Z1 Z1B Z2 blocked Reset of power swing blocking for all types of faults Tele pilot protection for distance protection ANSI 85 21 Modes of operation Additional functions Transmission and reception signals Direct transfer trip DTT Direct phase selective tripping via binary input Trip time delay Timer tolerance PUTT Z1B acceleration DUTT PUTT acceleration with pickup POTT Directional comparison Reverse interlocki
146. ping time Typical 35 ms with FO cable Ipie gt 2 x Ipit gt setting value High current differential trip stage pif gt gt Setting range Ipitt gt gt secondary 1 A 0 8 to 100 A steps 0 01 A secondary 5 A 4 0 to 50 A Tripping time Typical 16 ms with FO cable lnm 2 x lnm gt gt setting value Vector group adaption with transformers in the differential zone Adaption of connection sympol 0 to 11 x 30 step 1 Neutral point connection Grounded earthed or not grounded earthed for each winding Inrush restaint Restraint ratio 2 harmonic nj la 10 to 45 step 1 1 1 A to 25 A step 0 1 A Can be switched on and off 0 to 60 s step 0 01 s or deactivated operating up to release Max current for restraint Crossblock function Max operative time for crossblock Toper crossblk Backup emergency overcurrent protection ANSI 50N 51N 67 67N Operating modes Backup always active or emergency e g loss of data connection Characteristic 2 definite time stages 1 inverse time stage Definite time stage ANSI 50 50N Phase current pickup Jph gt gt 0 1 to 25 A qa 0 5 to 125 A 5A step 0 01 A or deactivated 0 05 to 25 A 1a 0 25 to 125 A 5A step 0 01 A or deactivated 0 1 to 25 A qa 0 5 to 125 A 5A step 0 01 A 0 05 to 25 A 1a 0 25 to 125 A 5a step 0 01 A 0 1 to 25 Aq a 0 5 to 125 Avs a Earth current pickup 3 o gt gt Phase current pickup Jph
147. pping The power system star point can be solid or impedance grounded earthed resonant earthed via Peterson coil or isolated On the TAP line the 7SD52 53 differential relay is connected to current CT and optionally voltage VT transformers For the differential func The link to the other relays is made by multi mode or mono mode FO cables There are 5 options available which corre spondingly cover 1 5 km multi mode 3 5 km multi mode e 1300 nm upto 24km mono mode e 820 nm support of the IEEE C37 94 interface e 820 nm up to e 820 nm up to 60 km mono mode e 1550 nm upto 100 km mono mode e 1300 nm up to Direct fiber optic connection offers high speed data exchange with 512 kbit s and improves the speed for remote signaling At the main line two differential relays are connected to CTs The communication is made via a multiplexed communication 7 Line Differential Protection 7SD52 53 The 7SD52 53 offers many features to reliably and safely handle data exchange via communication networks Depending on the bandwidth available in the communication system 64 128 or 512 kbits s can be selected for the X21 RS422 interface the G703 interface with 64 kbit s and G703 E1 2 048 kbit s or G703 T1 1 554 kbit s Furthermore the 7SD610 supports the IEEE C37 94 interface with 1 2 4 and 8 timeslots The connection to the communication device is effected via cost effective 820 nm interfac
148. r each stage 10 to 45 of the fundamental Min negative sequence current 372 Component of the 2 harmonic step 1 Max current which cancels inrush 0 5 to 25 A qa 2 5 to 125 A a current blocking step 0 01 A Tele pilot protection for directional ground earth fault overcurrent protection ANSI 85 67N Operating modes Directional comparison Pickup Directional comparison Blocking Directional comparison Unblocking Additional functions Echo see function weak infeed transient blocking for schemes with parallel lines Transmission and reception signals Phase selective signals available for maximum selectivity with single pole tripping signals for 2 and 3 end lines Weak infeed protection with undervoltage ANSI 27WI Echo Echo and trip with undervoltage 2 to 70 V step 1 V Operating modes with carrier signal reception Undervoltage phase ground earth Time delay 0 00 to 30 s step 0 01 s Echo impulse 0 00 to 30 s step 0 01 s Tolerances Voltage threshold lt 5 of set value or 0 5 V Timer 1 of set value or 10 ms Fault locator Output of the distance to fault X R secondary in Q X R primary in Q Distance in kilometers or in of line length Start of calculation With trip with reset of pickup with binary input 0 005 to 6 5 Q kmia y 0 001 to 1 3 Q km a step 0 0001 02 km For sinusoidal quantities lt 2 5 line length for 30 lt Msc lt 90 and Vsc Vnom
149. reclosure for 1 phase faults no reclosing for multi phase faults 1 pole auto reclosure for 1 phase faults and for 2 phase faults without earth no reclosing for multi phase faults 1 pole auto reclosure for 1 phase and 3 pole auto reclosing for multi phase faults 1 pole auto reclosure for 1 phase faults and 2 phase faults without earth and 3 pole auto reclosure for other faults Multiple shot auto reclosure Interaction with an external device for auto reclosure via binary inputs and out puts Control of the integrated AR function by external protection e Adaptive auto reclosure Only one line end is closed after the dead time If the fault persists this line end is switched off Otherwise the other line ends are closed via a command over the communication links This avoids stress when heavy fault currents are fed from all line ends again Interaction with an external synchro check T s LSA2185 agpen eps 6 810 20 Ty oy _ 0 14 1 I 1 P Fig 7 15 Inverse e Monitoring of the circuit breaker auxil lary contacts In addition to the above mentioned operat ing modes several other operating princi ples can be employed by means of the integrated programmable logic CFC Integration of auto reclosure in the feeder protection allows evaluation of the line side voltages A number of voltage dependent supplementary functions
150. reduced so that they are only required to conduct the steady state through flowing short circuit current without saturation Pilot wire link pilot wire monitoring The link to the remote station comprises a symmetrical pair of wires e g telephone lines The maximum permissible distance between two stations is approximately 12 km 7XR9513 20 kV or 7XR9515 5 kV isolation transformers can be em ployed for potential isolation against inter ference induced by longitudinal voltages where the pilot wires run parallel to power cables over long distances Since the pilot wires form an integral part of the differential protection these are nor mally monitored continuously This func tion is available as an option To achieve this 2 kHz pulses with a defined pulse width ratio are transmitted to the remote relay via the pilot wires Detection of a fault in the pi lot wire link results in blocking of the dif ferential protection Emergency overcurrent protection If the differential protection becomes inac tive due to a pilot wire failure or an internal or external blocking of the differential func tion the relay offers a single stage defi nite time overcurrent function It works with the local flowing operational current I The pickup value and the delay time are settable via parameters in the device Circuit breaker intertripping remote trip ping Normally tripping is effected at both sta tions as a result of cur
151. rent comparison Tripping at one end only can occur when an overcurrent release is used or with short circuit currents only slightly above the tripping value Circuit breaker intertripping can be parameterized in the unit with integral pilot wire monitor so that definite tripping at both ends of the line is assured In addition it is possible by means of a bi nary input to output a remote tripping command for both directions The com mand transmission time is approximately 80 ms Lockout of the TRIP command with manual reset The TRIP command can be locked out after tripping In particular in the case of trans formers within the protection zone reclosure of the line is normally effected only after the cause of the fault has been as certained by the user Manual reset is possi ble either via the operator panel with password or via a binary input As a result premature reclosure of the circuit breaker is prevented The logic state of the TRIP com mand remains stored even during failure of the auxiliary supply voltage so that it is still present on restoration of the auxiliary sup ply voltage Inrush restraint instantaneous tripping stage Where transformers or reactors are located within the protection zone inrush restraint can be supplied as an option This inrush restraint evaluates the second harmonic of the differential current which is typical for inrush phenomena If the second har monic value of the differe
152. rnal event e 24 remote signals can be freely assigned to inputs and outputs at each line end and are circulating between the different devices Communication topologies modes of operation The differential relays may work in a ring or daisy chain line topology Use of a test mode offer advantages under commission ing and service conditions e The system tolerates the loss of one data connection in a ring topology The ring topology is rerouted within 20 ms form ing then a chain topology while the dif ferential protection function is immediately reactivated e When the communication connections need to be reduced or when these are not available the whole system is able to function without interruption as chain topology At the line ends only cost effective 7SD52 53 relays with one pro tection data interface are necessary for this application The two end line is a special case be cause when the main connection is inter rupted the communication switches over from a main path to a secondary path This hot standby transmission function ensures a high availability of the system and protects differential protec tion against communication route failure on important lines Ring topology Terminal 2 7SD523 i Terminal 3 78D523 LSA2673 agpen eps A Terminal 1 7SD523 e Ina ring topology one line end can be logged out from the differential protec tion topology for service or
153. rotection 7SD61 Selection and ordering data Description Order No Short code 7SD61 numerical line differential protection 750610 0 OOOOO OOO0O0 000 87L SIPROTEC 4 for two line ends allows transformers in the protection zone Current transformers A AAAA t T t T AAA I 1A LAT 1 lp 5A 55A 5 see next page Auxiliary voltage Power supply BI operating voltage 24 to 48 V DC trigger level binary input 19 V 7 2 60 to 125 V DC trigger level binary input 19 V 7 4 110 to 250 V DC 115 to 230 V AC trigger level binary input 88 V 7 5 110 to 250 V DC 115 to 230 V AC trigger level binary input 176 V 7 6 Housing number of binary inputs outputs Flush mounting housing with screw type terminals 1 3 19 7 BI 5 BO 1 live status contact B Surface mounting housing with screw type terminals 1 3 19 7 BI 5 BO 1 live status contact a Flush mounting housing with plug in term 1 3 19 7 BI 5 BO 1 live status contact K Region specific default settings function versions and language settings Region DE German language language changeable Region world English language language changeable Region US US English language language changeable Region world French language language changeable Region world Spanish language language changeable Region world Italian language language changeable mm Oo a o gt System interfaces funct
154. rrent transformers satu ration level For an external fault only 5 ms saturation free time are necessary to guarantee the stability of the differen tial configuration e With transformers or compensation coils in the protection zone the sensitive trip stage can be blocked by an inrush detec tion function It works with the second harmonic of the measured current which is compared with the fundamental com ponent e With transformers in the protection zone vector group adaptation and matching of different CT ratios are carried out in the relay Additionally the zero sequence current flowing through an earthed neutral is eliminated from the differential measurement The 7 D52 53 therefore works like a transformer differ ential relay whereas the line ends may be far away e A more sensitive protection for trans formers within the protection zone is given by measurement of the star point current on an earthed winding There fore the Jz current measuring input has to be used If the sum of the phase currents of wind ing is compared with the measured star point current a sensitive earth cur rent differential protection REF can be implemented This function is substantially more sensi tive than the differential protection dur ing faults to earth in a winding detecting fault currents as small as 10 of the transformer rated current Enhanced communication features for communication networks The data required f
155. rs fast tripping time and high speed fault clearence time When a long line or cable is switched on transient charge currents load the line To avoid a higher setting of the sensitive differential trip stage this setpoint may be increased for a settable time This of fers greater sensitivity under normal load conditions With the setting of the CT errors the relay automatically calculates the re straint stabilization current and adapts its permissible sensitivity according to the CT s data in the differential configu ration optimizing sensitivity Different CT ratios at the line ends are handled inside the relay The mismatch of 1 to 6 is allowed The differential protection trip can be guarded with an overcurrent pickup Thus differential current and overcur rent lead to a final trip decision e Easy to set tripping characteristic Because the relay works adaptively only the setpoint lnr gt sensitive stage and lnn gt gt high set current differential stage must be set according to the charge current of the line cable With an optional capacitive charge cur rent compensation the sensitivity can be increased to 40 of the normal setting of Inrr gt This function is recommended for long cables and long lines s Differential and restraint currents are monitored continuously during normal operation and are displayed as opera tional measurements e High stability during external faults even with different cu
156. s tion up to 1 5 km or for connection to Permissible fiber attenuation 8 dB a communication converter 820 nm FO6 OMA2 Fiber optic interface For multi mode fiber 62 5 125 um for direct connection up to 3 5 km ST connectors 820 nm Permissible fiber attenuation 16 dB New fiber optic interfaces series FO1x FO17 for direct connection upto For mono mode fiber 9 125 um 24 km 1300 nm LC Duplex connector Permissible fiber attenuation 13 dB FO18 for direct connection upto For mono mode fiber 9 125 um 60 km 1300 nm LC Duplex connector Permissible fiber attenuation 29 dB FO19 for direct connection upto For mono mode fiber 9 125 um 100 km 1550 nm LC Duplex connector Permissible fiber attenuation 29 dB Relay communication equipment External communication converter 7XV5662 0AA00 for communication networks X21 G703 64 kbit s External communication converter to interface between the relays optical 820 nm interface and the X21 RS422 G703 64 kbit s interface of a commu nication device X21 G703 RS422 selectable by jump ers Baud rate selectable by jumpers Input fiber optic 820 nm Max 1 5 km with 62 5 125 um with clock recovery multi mode FO cable to device side Output X21 RS422 electrical 64 128 512 kbit selectable by jumper interface on communication device max 800 m 15 pin connector G703 64 kbit s electrical interface on 64 kbit s max 800 m screw type communication device terminal Exter
157. s also available The direction decision can be determined by the neutral current and the zero sequence voltage or by the negative sequence components V2 and h In addi tion or as an alternative to the directional determination with zero sequence voltage the star point current of a grounded earthed power transformer may also be used for polarization Dual polarization applications can therefore be fulfilled Alternatively the direction can be deter mined by evaluation of zero sequence power Each overcurrent stage can be set in forward or reverse direction or for both di rections non directional As an option the 7SD52 53 relay can be provided with a sensitive neutral residual current trans former This feature provides a measuring range for the neutral residual current from 5 mA to 100 A with a nominal relay current of 1 A and from 5 mA to 500 A with a nominal relay current of 5 A Thus the ground earth fault overcurrent pro tection can be applied with extreme sensi tivity The function is equipped with special digi tal filter algorithms providing the elimina tion of higher harmonics This feature is particularly important for low zero sequence fault currents which usually have a high content of 3 and 5 harmonics Inrush stabilization and instantaneous switch onto fault trip can be activated sep arately for each stage as well Different operating modes can be selected The ground earth fault protection
158. s in 3 orthogonal axes Half sine Acceleration 15 g duration 11 ms 3 shocks Shocks in each direction of 3 or thogonal axes Half sine Acceleration 10 g duration 16 ms 1000 shocks in each direction of 3 orthogonal axes Siemens BT E M E N S siemens russia com Technical data Climatic stress test Temperatures Standards Recommended temperature Limit temperature During service During storage During transport Storage and transport with standard works packing Humidity It is recommended to arrange the units in such a way that they are not exposed to direct sunlight or pro nounced temperature changes that could cause condensation Functions Line differential protection Note Setting ranges Current threshold 1 release by local station current Differential current Delay time t Restraint by 2 harmonic see Fig 7 4 2f JN Reset ratio Inherent delays TRIP time for two end supply at 4 x set value Drop off time Tolerances at preset values under reference conditions Local station current threshold Differential current Influence parameters Auxiliary supply voltage 0 8 lt Val Vas S X 1 15 Temperature in range 0 C lt Oamp 40 C Frequency in range 0 9 lt HN lt 1 1 Pilot wires Number Core to core asymmetry at 800 Hz Maximum loop resistance Permissible induced longitudinal voltages On direct connection of the pilot wires For connection via isolating transformer Siemens
159. s max pre trigger and post fault time settable 0 30 to 5 00 s step 0 01 s 0 05 to 0 50 s step 0 01 s 0 05 to 0 50 s step 0 01 s 1 instantaneous value per 1 66 ms 1 instantaneous value per 1 38 ms Using test circuit SIEMENS siemens russia com 7 Line Differential Protection 7SD60 Technical data 4AM4930 summation current transformer Power consumption in the circuit with standard connection L1 L3 E Fig 7 6 referred to the through flowing rated current 7SD600 unit in operation in phase approx VA Ix Ll 12 13 1A Single phase 22 13 i Symmetrical three phase 0 6 0 2 0 35 5A Single phase 35 15 22 Symmetrical three phase 0 7 0 2 0 5 Connections 4AM4930 7DB 4AM4930 6DB CT rated current IN 1A 0 5A Number of turns Primary windings AtoB 5 1 Cto D 10 2 Eto E 15 3 Gto H 30 6 ItoK 30 6 KtoL 30 6 Lto M 60 12 Secondary windings Y to Z 1736 1736 Thermal rating Continuous cur AtoB 4 5 20 rent in Amperes CtoD 4 5 20 EtoF 4 5 20 Gto H 4 5 20 ItoK 12 6 5 KtoL T 6 5 LtoM T 6 5 YtoZ 0 2 0 2 Secondary rated cur Y to Z 20 mA 20 mA rent with standard con nection see Fig 7 6 and symmetrical 3 phase current T Requirements forthe K ssc gt met Sul current transformers and pa CT ees S Can ana K lt effective symmetrical short circuit current factor end 1 K sc2 effective symmetrical short circuit current factor end 2 Isccmax maximum symmetrical short circuit current
160. sions see dimension drawings part 15 Approx 4 5 kg Approx 4 kg IP 51 IP21 RS485 2 8 kV DC for 1 min Via wire to housing terminals 2 data transmission lines 1 earthing cable for connection to an RS485 lt 9RS232 converter cables have to be shielded screen has to be earthed Setting at supply 9600 baud Min 1200 baud max 19200 baud SIEMENS siemens russia com 7 Line Differential Protection 7SD60 Technical data Electrical tests Specification Standards Insulation tests IEC 60255 5 ANSI IEEE C37 90 0 Voltage test routine test All circuits except DC voltage supply and RS485 Only DC voltage supply and RS485 Impulse voltage test type test All circuits class III 2 kV r m s 50 Hz 2 8 kV DC 5 kV peak 1 2 50 us 0 5 J High frequency test Document 17C SEC 102 2 5 kV peak alternating polarity 100 kHz 1 MHz 10 and 50 MHz decaying oscillation Ri 50 Q EMC tests for interference emission type tests Standard EN 50081 generic standard Conducted interference volage on 150 kHz to 30 MHz lines auxiliary voltage only EN 55022 VDE 0878 Part 22 CISPR 22 limit value limit class B Interference field strength 30 to 1000 MHz EN 55011 VDE 0875 Part 11 IEC CISPR 11 limit value Test crosswise Measurement circuits pilot wire connections power sup ply binary inputs class III no tests crosswise over open contacts RS458 interface ter min
161. sitive Voltages 3 x Vehase Ground 3 x VPhase Phasey 3 Vo Ven Vsync Vcomp e Symmetrical components J b Vi V2 s Real power P Watt reactive power Q Var apparent power S VA e Power factor PF cos s Frequency f Differential and restraint current per phase e Load impedances with directional indica tion 3x Rphase Grounds XPhase Ground 3 x Rehase Phases XPhase Phase e Long term mean values 3 x phases 3 P P P Q Q Q S e Minimum maximum memory KE Tphase3 hj33x Vehase Ground 3x VPhase Phase 3 Vo Vi P P Qt Q 5 f power factor power factor from mean values 3 x Iphase J1 P Q S e Energy meters WG Wp Wass Wao e Availability of the data connection to the remote line ends per minute and per hour e Regarding delay time measuring with the GPS version the absolute time for trans mit and receive path is displayed sepa rately Limit value monitoring Limit values are monitored by means of the CFC Commands can be derived from these limit value indications Siemens SIP Edition No 6 SIEMENS slemens russla com 7 Line Differential Protection 7SD52 53 Every two seconds the currents and volt ages are freezed at the same time at all line ends and transmitted via the commu nication link At a local line end currents and voltages are thus available with their amount and phases angle locally and re motely This allows checking the whole configuration under load
162. sitive earth current differential protection REF can be im plemented This function is substantially more sensitive than the differential pro tection during faults to earth in a winding detecting fault currents as small as 10 of the transformer rated current Characteristics of differential protection communciation through the remote relay interfaces The 7SD610 is ideally adapted for applica tion in communication networks The data required for measurement of dif ferential currents and numerous other vari ables are exchanged between the protection units in the form of synchronous serial tele grams employing the full duplex mode The telegrams are secured using 32 bit check sums so that transmission errors in a com munication network are detected immedi ately Moreover each telegram carries a time stamp accurate to a microsecond thus allowing measurement and monitoring of the continuous transmission delay times e Data communication is immune to elec tromagnetic interference since fiber optic cables are employed in the critical region e g in the relay house or relay room Monitoring of each individual incoming telegram and of overall communication between the units no need of supplemen tary equipment The check sum correct ness of the telegram contents the address of the neighboring unit and the transmis sion delay time of the telegram are moni tored Unambiguous identification of each unit is en
163. ssible modes of operation of the differential protection section Special modes of operation such as the Serer Commissioning mode and Test opera tion are advantageous for commissioning and servicing the units e In general an alarm indication is gener ated on interruption of the communica tion links and an attempt is made to re establish the communication link The units operate in the emergency mode provided that these have been parameter ized e The complete configuration can also be used in a testing mode The local end is in an operating mode which for example allows the pickup values to be tested The current values received from the remote end of the line are set to zero so as to achieve defined test conditions The re mote end unit ignores the differential currents which occur as a result of test ing and blocks differential protection and breaker intertripping It may optionally operate in the backup protection mode Differential protection is activated in the commissioning mode However test cur rents injected at one end of the line and which generate a differential current do not lead to output of a TRIP command by the differential protection or to breaker intertripping All those indications that would actually occur in conjunction with a genuine short circuit are generated and displayed TRIP commands can be issued by the backup protection Siemens SIP Edition No 6
164. sured by assignment of a settable communication address within a differen tial protection topology Only those units mutually known to each other can coop erate Incorrect interconnection of the communication links results in blocking of the protection system Detection of telegrams which are re flected back to the transmitting unit within the communication network Detection of path switching in a commu nication network Automatic restraint of the protection function until measure ment of the parameters of the new com munication link has been completed e Continuous measurement of the trans mission delay time to the remote line end Taking into account the delay time in dif ferential current measurement and com pensation thereof including monitoring of a settable maximum permissible delay time of 30 ms Generation of alarm signals on disturbed communication links Statistical values for the percentage availability of the commu nication links per minute and per hour are available as operational measured val ues With a GPS high precision 1 s pulse from a GPS receiver the relays can be syncro nized with an absolute exact time at each line end In this way the delay in the re ceive and transmit path can be measured exactly With this optional feature the re lay can used in communication networks where this delay times are quite different Phase selective intertrip and remote trip indications Normally the
165. t is generally impossible to communicate with a unit that has failed If a unit were to fail there is no effect on the communication Fig 7 19 with the rest of the system I Bus structure for station bus with Ethernet and IEC 61850 Siemens SIP Edition No 6 SIEMENS siemens russia com 7 Line Differential Protection 7SD61 Communication IEC 61850 Ethernet LSP2163 afpen tif The Ethernet based IEC 61850 protocol is the worldwide standard for protection and control systems used by power supply cor porations Siemens was the first manufac turer to support this standard By means of this protocol information can also be ex changed directly between bay units so as to set up simple masterless systems for bay ans 4 j system interlocking Access to the units via the Fthernet bus is also possible with DIGSI Fig 7 20 Fig 7 21 RS232 RS485 electrical communication module PROFIBUS communication module optical double ring LSP2164 afpen tif IEC 60870 5 103 IEC 60870 5 103 is an internationally stan dardized protocol for the efficient commu nication in the protected area IEC 60870 5 103 is supported by a number of protection device manufacturers and is used worldwide LSP2162 afpen tif PROFIBUS DP PROFIBUS DP is an industry recognized 5 standard for communications and is sup Z ported by a number of PLC and protection a
166. tage compared to signal command outputs is approx 3 ms mainly for protection commands 6 High speed trip outputs are identified in the in the terminal diagram 7 72 The time advantage compared to fast relays is approx 5 ms siemens l IVI ENS siemens russia com Selection and ordering data em use a separate fiber optic switch ND Ln WwW 7 Line Differential Protection 7SD52 53 Description Order No Short code 7SD5 combined multi end line differential protection 75D52 DD DODDD D DDD DDD with distance protection continued System interfaces AA t t t t AAA No system interface IEC protocol electrical RS232 IEC protocol electrical RS485 IEC protocol optical 820 nm ST plug PROFIBUS FMS Slave electrical RS485 PROFIBUS FMS Slave optical 820 nm twin ring ST plug Gl lW Further protocols see supplement L 9 see next page PROFIBUS DP slave RS485 PROFIBUS DP slave optical 820 nm double ring ST connector DNP 3 0 RS485 DNP 3 0 optical 820 nm ST connector 7 IEC 61850 100 Mbit Etherrnet electrical double RS45 connector EN100 gt qQ o s IEC 61850 100 Mbit Ethernet with integrated switch optical double LC connector EN100 7 nH DIGSI Modem interface on rear of device and protection interface 1 See additional indication M 9 MOO DIGSI Modenm interface on rear of device
167. ter face can thus be reduced and restricted to the most important signals Transmission lockout A data transmission lockout can be acti vated so as to prevent transfer of informa tion to the control center during work on a circuit bay Test operation During commissioning all indications can be passed to an automatic control system for test purposes Siemens SIP Edition No 6 SIEMENS siemens russia com 7 Line Differential Protection 7SD52 53 Communication With respect to communication particular emphasis has been placed on high levels of flexibility data integrity and utilization of standards common in energy automation The design of the communication modules permits interchangeability on the one hand and on the other hand provides openness for future standards for exam ple Industrial Ethernet Local PC interface The PC interface accessible from the front of the unit permits quick access to all pa rameters and fault event data Of particular advantage is the use of the DIGSI 4 operat ing program during commissioning Rear mounted interfaces Two communication modules located on the rear of the unit incorporate optional equipment complements and readily per mit retrofitting They assure the ability to comply with the requirements of different communication interfaces The interfaces make provision for the fol lowing applications e Service modem interface By means of
168. terlocking RS232 RS485 electrical communication module PROFIBUS communication module optical double ring LSP2163 afpen tif LSP2164 afpen tif Access to the units via the Ethernet bus is also possible with DIGSI IEC 60870 5 103 IEC 60870 5 103 is an internation ally standardized protocol for the efficient communication in the protected area IEC 60870 5 103 is supported by a number of protec LSP2162 afpen tif tion device manufacturers and is S used worldwide S K PROFIBUS DP PROFIBUS DP is an industry Fig 7 62 o Fig 7 63 _ vedstaidard f 820 nm fiber optic communication module Fiber optic Ethernet communication module for reve S SET A IEC 61850 with integrated Ethernet switch cations and is supported by a num ber of PLC and protection device manufacturers Telecontrol interface to Time Operation and system control centers synchroni DNP 3 0 monitoring e g IEC 60870 5 104 zation DCF77 GPS DNP 3 0 Distributed Network Po Protocol Version 3 is a messaging based communication protocol The SIPROTEC 4 units are fully Substation Level 1 and Level 2 compliant with Station bus controller DNP 3 0 DNP 3 0 is supported by a number of protection device manufacturers RS485 optical converter optical RS232 converter LSA4742a en eps odem odem DIGSI 4 Remote control via modem DIGSI 4 Local for commissioning Fig 7 64 System solution
169. tial Protection 7SD52 53 Connection diagram Surface mounting housing BO8 7 Flush mounting housing E E E E E i mm SES LR I Fast BO1 ON 100 Q2 B010 MNN Fast BO2 49 Q3 l2 Fast BO3 BO11 99 Q4 Z 48 O5 TTT Fast BO4 98 Q6 K11 70 BO12 a7 O7 YT 7 Fast BOS erat reia 12 Fast BO6 hee UBS B013 al J K15 168 5 O e L Fast BO7 KIS 118 773 BOs R1 149 X42 Bog R2 199 BOI B0100 R3 48 B0111 i Tra 98 OOF R5 197 ae B012 R6 47 B015 3 2 R7 96 O O LSA4468 eps BO13 R8 146 Fig 7 89 B014 RG T Additional setting by jumpers Bots RT 94 Separation of common circuit of D BO8 to BO12 with jumpers X80 X81 B016 ee T LES 20 X82 Switching of BO14 BO15 as NO na NO Leg contact or NC contact with jumpers ual
170. tic fault influ ences are largely eliminated by the use of twisted pair conductors Upon failure of a unit the remaining system continues to operate without any disturbances Fiber optic double ring circuit The fiber optic double ring circuit is im mune to electromagnetic interference Upon failure of a section between two units the communication system con tinues to operate without disturbance It is generally impossible to communicate with a unit that has failed If a unit were to fail there is no effect on the communica tion with the rest of the system Substation controller LSA2253 bgpen eps Fig 7 58 IEC 60870 5 103 star type RS232 copper conductor connection or fiber optic connection Control center Option SICA PAS X Switch a a c o D pe 2 4 a a Fig 7 59 Bus structure for station bus with Ethernet and IEC 61850 7 56 Siemens Bet E M E N S siemens russia com 7 Line Differential Protection 7SD52 53 Communication IEC 61850 Ethernet The Ethernet based IEC 61850 protocol is the worldwide standard for protection and control systems used by power supply corpora tions Siemens was the first manu facturer to support this standard By means of this protocol infor mation can also be exchanged directly between bay units so as to set up simple masterless systems Fig 7 60 Fig 7 61 for bay and system in
171. tion of the protec tion communication and or failure of the voltage in the VT secondary circuit emergency operation The secondary voltage failure can be detected by the inte grated fuse failure monitor or via a binary input from a VT miniature circuit breaker VT m c b trip The following inverse time characteristics according to IEC 60255 3 and ANSI IEEE are provided e Inverse Short inverse e Long inverse Moderately inverse e Very inverse e Extremely inverse e Definite inverse STUB bus overcurrent protection ANSI 50 N STUB The STUB bus overcurrent protection is a separate definite time overcurrent stage It can be activated from a binary input signaling the line isolator disconnector is open Settings are available for phase and ground earth faults Siemens SIP Edition No 6 SIEMENS siemens russia com 7 Line Differential Protection 7SD52 53 Protection functions Instantaneous high speed switch onto fault overcurrent protection ANSI 50HS Instantaneous tripping is possible when energizing a faulty line In the event of large fault currents the high speed switch onto fault overcurrent stage can initiate very fast 3 pole tripping With lower fault currents instantaneous tripping after switch onto fault is also pos sible if the breaker positions at the line ends are monitored and connected to the re lays This breaker position monitor offers a high speed trip
172. trip due to this loss of voltage This secondary voltage interruption can be detected by means of the integrated fuse failure monitor Immediate blocking of distance protection is provided for all types of secondary voltage failures Additional measurement supervision func tions are e Symmetry of voltages and currents e Summation of currents and voltages Trip circuit supervision ANSI 74TC One or two binary inputs for each circuit breaker pole can be used for monitoring the circuit breaker trip coils including the connecting cables An alarm signal is is sued whenever the circuit is interrupted Lockout ANSI 86 All binary outputs can be stored like LEDs and reset using the LED reset key The lockout state is also stored in the event of supply voltage failure Reclosure can only be issued after the lockout state is reset 7 Line Differential Protection 7SD52 53 Local measured values The measured values are calculated from the measured current and voltage signals along with the power factor cos the frequency the active and reactive power Measured values are displayed as primary or secondary values or in percent of the specific line rated current and voltage The relay uses a 20 bit high resolution AD con verter and the analog inputs are factory calibrated so a high accuracy is reached The following values are available for mea sured value processing Currents 3 x IPhase 3 Io Te TE sen
173. ts Tolerances Voltages Tolerances Power with direction indication Tolerances P for cosol 0 7 to 1 and VI Vnom I Inom 50 to 120 Q for sin l 0 7 to land ViVnonpl inom 50 to 112019 S for V Voom I Inom 50 to 120 Frequency Tolerance Power factor Tolerance for cos Q 07 tol Load impedances with directional indication Overload measured values Long term mean values Interval for derivation of mean value Synchronization instant Values 1 to 4 steps 0 01 1 to 999 9 min steps 0 1 min 50 to 100 in relation to the trip temperature 0 1 to 4 A step 0 1 0 5 to 20 A step 0 1 PL t Tln ee I k Iy Approx 0 99 Approx 0 99 Approx 0 99 Class 10 acc to IEC Up to 3 lor2 1 to 30 s step 1 s Primary secondary and percentage referred to rated value 3 x IPhase 310 IGnd sensitves J1 12 Ty 3I0PAR 3 x Init 3 x Istab lt 0 5 of indicated measured value or 0 5 Inom 3 X VPhase Ground 3 X VPhase Phase 3 Vo Vi Vz Vsync Ven Vcomp lt 0 5 of indicated measured value or 0 5 Vnom P QS Typical lt 1 Typical lt 1 Typical lt 1 i lt 20 mHz PF cos 0 Typical lt 3 3 x Rphase Ground XPhase Ground 3 x Rphase Phase XPhase Phase Orip L1 O Orrip L2 O Orrip L3 O OTrip 15 min 1 min 15 min 3 min 15 min 15 min Every hour every LS hour every hour 3 X Phase i P P P Q Qt OZS Siemens BT
174. ture connector SUB D 5 or 12 or 24V 500 V 50 Hz Service interface operating interface 2 for DIGSI 4 modem service Isolated RS232 RS485 Dielectric test Distance for RS232 Distance for RS485 depends on the baud rate Fiber optic Optical wavelength Permissible attenuation Distance System interface refer to ordering code Isolated RS232 RS485 Baud rate Dielectric test Distance for RS232 Distance for RS485 9 pin subminiature connector 500 V 50 Hz Max 15m Max 1000 m Integrated ST connector A 820 nm Max 8 dB for glass fiber 62 5 125 um Max 1 5 km IEC 61850 Ethernet IEC 60870 5 103 PROFIBUS FMS PROFIBUS DP DNP 3 0 9 pin subminiature connector 4800 to 38400 baud 500 V 50 Hz Max 15m Max 1000 m SIEMENS siemens russia com 7 Line Differential Protection 7SD52 53 Technical data System interface continued PROFIBUS RS485 Dielectric test 500 V 50 Hz Baud rate Max 12 Mbaud Distance 1 km at 93 75 kB 100 m at 12 MB PROFIBUS fiber optic Only for flush mounting housing ST connector For surface mounting housing Optical interface with OLM Baud rate Max 1 5 Mbaud Optical wavelength A 820 nm Permissible attenuation Max 8 dB for glass fiber 62 5 125 um Distance 500 kB s 1 6 km 1500 kB s 530 m Protection data interface R2R interface FOS OMA1 Fiber optic interface For multi mode fiber 62 5 125 um with clock recovery for direct connec ST connector
175. us For 0 5 s Signal contacts Number of relays Contacts per relay Switching capacity Make Break Switching voltage Permissible current Siemens SIP Edition No 6 20 mA without summation current transformer 1 or 5 A with summation current transformer 50 60 Hz parameterizable 2xIn 30 X Da 100 x In 24 48 V DC 19 to 58 V DC 60 110 125V DC 48 to 150 V DC 220 250 V DC 176 to 300 V DC lt 12 at rated voltage lt 6 at limits of admissible voltage Approx 2 W Approx 4 W gt 50 ms at Vaux 100 V AC DC 20 ms at Vaux 24 V DC 115 V AC 88 to 133 V AC 2 marshallable 2 NO or 1 NO 1000 W VA 30 W VA 250 V 5A 30A 3 2 marshallable 1CO 1000 W VA 30 W VA 250 V AC DC DIA 7 Line Differential Protection 7SD60 Binary inputs Number Operating voltage Current consumption energized Pick up threshold reconnectable Rated aux voltages 24 48 60 V DC Vpick up Varop off Rated aux voltages 110 125 220 250 V DC Vpick up Varop off Unit design Housing Dimensions Weight With housing for surface mounting With housing for flush mounting cubicle mounting Degree of protection acc to EN 60529 Housing Terminals Serial interface Isolated Standard Test voltage Connection Baud rate 3 marshallable 24 to 250 V DC Approx 2 5 mA independent of operating voltage By solder bridges 217 VDC lED 2 74VDC lt 45V DC 7XP20 For dimen
176. ween optical 820 nm interface and G703 E1 T1 interface of a communication network Connection via FO cable for 62 5 125 um or 50 120 um and 820 nm wavelength multi mode FO cable with ST connector max distance 1 5 km Electrical connection via G703 E1 T1 interface 7XV5662 0AD00 Opto electric communication converter connection to pilot wire Converter to interface to a pilot wire or twisted telephone pair typical 15 km length Connection via FO cable for 62 5 125 um or 50 120 um and 820 nm wavelength multi mode FO cable with ST connector max distance 1 5 km screw type terminals to pilot wire 7XV5662 0ACOO Additional interface modules Protection data interface mod opt 820 nm multi mode FO cable ST connector 1 5 km Protection data interface mod opt 820 nm multi mode FO cable ST connector 3 5 km C53207 A351 D651 1 C53207 A351 D652 1 Further modules Protection data interface mod opt 1300 nm mono mode FO cable LC Duplex connector 24 km Protection data interface mod opt 1300 nm mono mode FO cable LC Duplex connector 60 km Protection data interface mod opt 1550 nm mono mode FO cable LC Duplex connector 100 km C53207 A351 D655 1 C53207 A351 D656 1 C53207 A351 D657 1 Optical repeaters Serial repeater 2 channel opt 1300 nm mono mode FO cable LC Duplex connector 24 km Serial repeater 2 channel opt 1300 nm mono mode FO cable LC Duplex connector 60 km Serial repeater
177. with without M with with l side measuring without without N with with l side measuring with without P with with 2 side measuring without without Q with with 2 side measuring with without R with with l side measuring without with S with with l side measuring with with T with with 2 side measuring without with U with with 2 side measuring with with V Additional functions 2 Measured values extended Min Max values External GPS synchronization Capacitive current load compensation without without TA 0 without with without 1 with without without 2 with with without 3 without without with 4 without with with 5 with without with 6 with with with 7 1 Only available with Order No Pos 7 2 or 6 2 Only available with Order No Pos 7 1 or 5 Siemens SIP Edition No 6 SIEMENS slemens russla com 7 Line Differential Protection 7SD52 53 Accessories Description Opto electric communication converter CC XG connection to communication network Converter to interface to X21 or RS422 or G703 64 kbit s synchronous communication interfaces Connection via FO cable for 62 5 125 um or 50 120 um and 820 nm wavelength multi mode FO cable with ST connector max distance 1 5 km Electrical connection via X21 RS422 or G703 64 kbit s interface Order No 7XV5662 0AA00 Opto electric communication converter CC 2M to G703 E1 T1 communication networks with 2 048 1 554 kbit s Converter to interface bet
178. work via IEEE C37 94 L Communi cation converter for pilot wires 7XV5662 0AC00 TN T foaaooo Pilot wire up to 15 km max 1 5 km for 62 5 125 um multi mode FO 820 nm O LSA4749en eps Fig 7 70 Connection to a pilot wire Siemens SIP Edition No 6 SIEMENS siemens russia com 7 Line Differential Protection 7SD52 53 Typical connection Typical connection for current and voltage transformers 3 phase current transformers with neutral point in the line direction I4 connected as summation current transformer 3 o Holmgreen circuit 3 voltage transformers without connection of the broken open delta winding on the line side the 3Vo voltage is derived inter nally Note Voltage inputs are always available in the relay But there is no need to connect it to voltage transformers for the differential protection function Alternative current measurement The 3 phase current transformers are con nected in the usual manner The neutral point is in line direction J is connected to a separate neutral core balance CT thus permitting a high sensitive 37o measure ment Note Terminal Q7 of the 74 transformer must be connected to the terminal of the core balance CT pointing in the same di rection as the neutral point of the phase current transformers in this case in line direction The voltage connection is ef fected in accordance with Fig 7 71 7 76 or 7 77
179. yp 29 ms 60 Hz Min 24 ms Typ 26 ms 0 to 60 s step 0 01 s Capacitive current load compensation Restraint ratio lc srap Icn High set fast trip stage az gt Setting range Ipig gt gt secondary 1 A secondary 5 A Tripping time three line ends Ipi 2 5 x Ipite gt gt setting 2 to 4 steps 0 1 0 8 to 100 A step 0 1 4 to 500 A step 0 5 Min 9 ms Typ 12 ms SIEMENS siemens russia com 7 Line Differential Protection 7SD52 53 Technical data Vector group adaptation with transformers in the differential zone Adaptation of connection symbol Neutral point connection Inrush restraint Restraint ratio 2 harmonic baal ln Max current for restraint Crossblock function Max operative time for crossblock Toper crossblk Distance protection ANSI 21 21N Distance protection zones Time stages for tripping delay Setting range Characteristic Selectable separately for phase and ground earth faults Types of pickup Types of tripping Time range Line angle p 1 Inclination angle for quadrilateral characteristic Quadrilateral reactance reach X Quadrilateral resistance reach R for phase to phase faults and phase to ground earth faults Mho impedance reach ZR Minimum phase current I Overcurrent pickup gt gt for I gt gt V lt I gt V lt I gt gt Minimum current pickup 7 gt for V lt I gt V lt I gt gt and Z lt Min
180. z There are four elements selectable as overfrequency or underfrequency and each element can be delayed separately Siemens SIP Edition No 6 SIEMENS siemens russia com 7 Line Differential Protection 7SD61 Protection functions Monitoring and supervision functions The 7SD610 relay provides comprehensive monitoring functions covering both hard ware and software Furthermore the mea sured values are continuously checked for plausibility Therefore the current and volt age transformers are also included in this monitoring system Current transformer Monitoring functions A broken wire between the CTs and relay inputs under load may lead to malopera tion of a differential relay if the load cur rent exceeds the differential setpoint The 7SD610 provides fast broken wire super vision which immediatelly blocks all line ends if a broken wire condition is measured by a local relay This avoids maloperation due to broken wire condition Only the phase where the broken wire is detected is blocked The other phases remain under differential operation Fuse failure monitoring If any measured voltage is not present due to short circuit or open circuit in the volt age transformer secondary circuit the dis tance protection would respond with an unwanted trip due to this loss of voltage This secondary voltage interruption can be detected by means of the integrated fuse failure monitor Immediate blo

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