USER MANUAL - seb barlassina
Contents
1. G 9 1614 5 yy AA 39239 Sud ALYA LOL 18 cls LLS 1 4 2999 L 4 1 4 1 4 1 4 qi eI erc dI dT lt lt lt lt lt lt SYALNNOI OLS 6S 85 Zs 9S SS vs 5 25 LS 8a ss wu yy uu pp 99IG AA GDIG AA INIL HLVd IH TH TA TA 954 Gey vey 54 eeu 9IG AA Z9IGd AA TOIA 966 966 566 566 TA TA TA ISHI SGHL TH USHL LEN 0 92H LC 9 555 uu uu uu uu ui wu ui SZHL UZHL IdI TH SdI LPI SPI LZH 0c 6L SLY ULT UU U UT uu uu UT uu uu UT uu uu UT uu uu UT uu uu UT UU UU UPI IU QLI Ta ASI TH QUI eLI eSI IH eur IS LIU OLY GLY LLH 99999999 S MM MM x fL GHL ZHL 74 UI XX XX LOL L AVIHH2. CB2 CB1 REAR VIEW Figure 9 47 SEB Divisione Elettronica e Sistemi INSTALLATION Dimensioni meccaniche Case outlines Dima montaggio da incasso Flush mounting panel cut out Dimensioni frontali mini rack per incasso Mini rack front sizes flush mounting 198 2 x 177 4U mm 77 L 101 5 0 3 48 N 4 fori 26 3 Raggio max 7 162 0 1 SEB Divisione Elettronica e Sistemi INSTALLATION 6 3 Relays R3 and R4 Signaling Command set up The protection relay is supplied with R3 and R4 relays configured as SIGNALING RELAYS with 2 change over output contacts with breaking capability equals to 0 2 A at 110 L R 40 ms 100000 operations Each R3 and R4 relay can be configured as COMMAND RELAY with 1 change over output contact with breaking capability equals to 0 5 A at 110 Vdc L R 40 ms 100000 operations The new configuration is obtained with the following cabling 6 4 RS485 serial communication port The digital protection relay IDG8N presents an insulated serial interface RS485 half duplex that
3. S FYUNDIH OL UI XXX UI XXX UI XX X UI XX X UI XX X UI XX X UI XX X UI XXX UI XXX XLXVd 37 13 3 SZ SA SX 17 14 IX ZITIGWLS 6A 8A 2 9A SA VA A CA LA guu guu guu guu guu guu UI XX XX ISHL SSHL USHL LZHL SZHL 141 SdI 8 4 114 Sid p xxx UI XX XX UI XXXX UT PX V AAAAA AAAAA AAAAA AAKKA V SOLVIS IPI SPI 11 51 X XX quI X XX elI X XX SI X XX eHI SAZOSVAN Old 6d 8d 14 9d Sd vd d MM SOLVIS MM GDIG MM 9I0 MM IVLIOId N LN uH 11915 999 u SAVIHI CIN LIN XX 304 105 164 504 540 409 3165 jeg SOG 544 GLX YX EX CX LLX OLX XX Seq 104 1949 164 XX X XX 660 XX Seu XX XX 144 XX 229 ey SHuOLOSA 6x 8x LX 9x SX vx LX 503215 sn jeqs 03245 513235 513235 513235 513235 SAOLVIS SOLVIS SINHAH lt lt lt CHL lt lt DI PI TIOHSHYHL IVNDIS SHH 0S VIN Z1 91 81 v1 1 c1 V1 uo 18 DISPLAY AND PROGRAMMING SEB Divisione Elettronica e Sistemi
4. Sacchetto BLISTER 1 n 8 screws to fix wire terminals of current circuits 2 n 4 screws to fix the relay rear socket on the 19 rack 3 n 2 screws to fix optionally the protection relay on the front of the 19 rack 4 n 2 knobs to fix the transparent front panel 5 n 8 washers to be used to fix wire terminals current 42 SEB Divisione Elettronica e Sistemi INSTALLATION 6 n 8 growers to be used to fix wire terminals current T items to fix the brackets for flush mounting not applicable The knobs to fix the transparent front panel must be screwed through the panel the front panel itself the operation will create a screw thread in the plastic material and the knobs will never be missed AMF3N module RK VERSION 19 rack installation the proper rack is supplied by SEB e AMF3N module with 1 rear socket e transparent front panel without push buttons e blister with items 1 2 3 4 5 6 2 Cabling For the protection relay insertion please refer to figures 6 7 and 8 For insertion scheme related to different vectorial group please contact SEB technical department Current circuits It is suggested to terminate the current wiring using eyelet terminals Minimum suggested wire cross section 2 5 mm Other circuits output relays etc It is suggested to terminate the current wiring using plug terminals Minimum suggested wire cro
5. IRa ISa ITa currents S T primary winding side IRb ISb ITb currents R S T secondary winding side b current values expressed as In of the installed CT s yyyyy actual primary value of the currents expressed as Amperes P7 P8 P9 IdR IdS IdT xx xx In XX XX In XX XX In P10 P11 P12 IpR Ips IpT XX XX In XX XX In XX XX In IdR 14 IdT differential currents R S T SEB Divisione Elettronica e Sistemi DISPLAY AND PROGRAMMING IpR IpS IpT stabilizing currents R S T current values expressed as In see paragraph 1 1 P13 P14 P15 TH2R TH2S TH2T nn nn nn P16 P17 P18 TH5R TH5S PROT nn 5 nn nn 5 TH2R TH2S TH2T 2 harmonic content of the differential currents R S T TH5R TH5S TH5T 5 harmonic content of the differential currents R S T nn harmonic content of the differential current expressed as 90 Y1 Y2 Y3 Y9 STABILIZING PARAMETERS Y1 Y2 Y3 Xr Yr Xs et In In In e Intermediate parameters to calculate the stabilizing currents components The parameters are used to check the proper insertion and programming of the protection relay use of the parameters is reserved to SEB protection relay engineers 5 10 Events fig 5 On the display are shown the memorized information related to the last 8 TRIP or STATUS events The 8 events are recorded and identified with a progressive number from 1 to
6. ON enabled threshold OF disabled threshold available but not active F2P THRESHOLD LEVEL SET UP programmable Ip XX XX In nn nn hreshold level Ip expressed in terms of In For the value of In please refer to paragraph 1 1 29 SEB Divisione Elettronica e Sistemi DISPLAY AND PROGRAMMING Examples Ip Ip 06 50 In 12 00 In F3P TIME DELAY SET UP programmable TI INDIP XX XX S Set up of time delay to the activation TRIP of the programmed output relays when the measured current exceeds the threshold level zz zz time delay programmable from 00 02 to 99 99 s F4P F5P ADDITIONAL TIME DELAY SET UP programmable 4 programmable F5P non programmable FAP F5P TA Ip TAIp XX XX S CCCCCCCC The selection allows to program an additional time delay TA from 00 00 to 99 99 seconds please note that at least one of the digital inputs should be programmed to activate time delay function ref H1 H6 paragraph 5 8 The additional time delay TA is added to the time delay TI to obtain the output relay trip when the TI TA time expires The display F5P shows the digital input programmed to activate the additional time delay TA on the displayed threshold The parameter eeeeeeee can show one of the following values DISABLED none of the digital inputs has been programmed to activate an additional time delay related to threshold Id DIG1 digital input DIG
7. 26 5 6 1 Percentage biased differential thresholds fig 2 26 5 6 2 Second differential thresholds 14 gt gt fig 2 28 5 6 3 Harmonic restrain thresholds TH2 TH5 fig 2 29 5 6 4 Overcurrent threshold stabilizing current Ip fig 2 29 5 6 5 Overcurrent thresholds line currents la gt Ib fig 2 30 5 7 Output relays programming fig 9 2 4 05 25225244 32 5 8 Digital inputs function programming fig 3 33 5 9 Parameter values visualization fig 4 35 EI NM CUS C IE 37 5 11 TRIPS COUNTERS teet 41 p INS TALEA TION tela ananas 42 SUP PleG sato alette ocean 42 9 2 act ci eot Lt diede 43 63 Relays R3 and R4 Signaling Command 49 6 4 RS485 serial communication 49 2 ai ee Neth a 50 Os FABLE rU 51 Information printed in this manual subject to change without prior notice This manual must not be reproduced in whole or in part in any form or by any means without the express written
8. IH TH SSSS IH TH SINHAH OLY 6 8 4H 9H SY LH t 38n59l3 44014 19 SEB Divisione Elettronica e Sistemi DISPLAY AND PROGRAMMING 5 3 Address and time fig 1 B1 RELAY MODEL not programmable IDT8N B2 B3 COMMUNICATION PROTOCOL programmable B2 PROTOCOL The communication protocol is programmable between the followings STANDARD ASCII SEB protocol MODBUS Modbus protocol SLAVE When the MODBUS protocol is selected the following display is showed to allow the selection of the transmission speed B3 BAUDRATE XXXX The xxxx parameter is selectable between the followings 300 600 1200 2400 4800 9600 When the STANDARD protocol is selected the baud rate is automatically selected by the protection relay B4 ADDRESS programmable NR RELAY 001 Programmable address from 001 to 255 The number is used on RS485 port to address a specific relay when two or more protection relays are linked on the same serial line B5 RELAY SERIAL NUMBER not programmable SER NR 0012345 B6 SOFTWARE REVISION LEVEL not programmable SW REV ZZ ZZ 20 SEB Divisione Elettronica e Sistemi DISPLAY AND PROGRAMMING B7 TIME DATE programmable dd mm yy hh mm ss Time and date are programmable and they are used to mark recorded events NOTE the clock is not provided with back up battery therefore a loss of auxiliary supply will
9. R1 Ib XXXXXXXX XXXXXXXX Programming of the R1 output relay activation TRIP on the Id Id gt gt la and thresholds or on the harmonic restrain thresholds The parameter xxxxxxxx is selectable as the following START instantaneous output relay R1 activation when one of the measured currents exceeds the programmed threshold TRIP output relay R1 activation when one of the measured currents exceeds the programmed threshold level for at least TI or TI TA seconds selection not present for TH2 and TH5 NONE no activation related to thresholds Examples related to several relays G2 G3 G4 G6 R1 Id R2 R1 TH2 R4 START TRIP START NO AZION G9 TEST OF OUTPUT RELAY R1 TEST R1 XXXXXXXX See paragraph 4 4 58 Digital inputs function programming fig 3 For each digital input one of the following functions are selectable a additional time delay related to one or more thresholds only time definite threshold b ON OFF threshold STATUS function recording of measures on external command d pilot wire fault monitoring only DIG2 monitors DIG1 When function a is programmed a message is displayed at ref EBD ESP FSP and F6A When the function of more than one digital input refers to a threshold the priority will be the following a OF selection threshold disabled has the priority on TA function additional time delay b the ALL selection ALL the thre
10. 99 99 s 51 52 SEB DIVISIONE ELETTRONICA E SISTEMI UFFICIO COMMERCIALE Via Segantini 5 20825 BARLASSINA MB tel 39 0362 5669 1 fax 39 0362 556622 web www seb barlassina it mail to servizio clienti seb barlassina it
11. Sed DIVISIONE ELETTRONICA E SISTEMI IDTSN DIGITAL PERCENTAGE BIASED TRANSFORMER DIFFERENTIAL PROTECTION RELAY USER MANUAL P501D808 September 2004 SEB Divisione Elettronica e Sistemi INDEX INDEX 1 GENERAL CHARACTERISTIGS atico iaia ila iaia 1 1 1 Operation of the differential thresholdS 3 1 2 Transformer differential protection ANSI 87T 6 1 3 Overcurrent thresholds ANSI 50 51 8 2 9 3 FRONT PANEL LED SIGNALING lella a 10 4 PROGRAMMING AND TEST iii 11 4 1 How to program the protection 11 42 Howto modify a visualized 12 49 12 AAY pesbteroutpubTeldys oec totum 13 5 DISPLAY AND PROGRAMMING 14 Dil Standard display oet en ete et etes 14 5 2 Visualization SUUCIUFG 15 5 3 Address and ume fig T sioni 6 44 el ea eae aes 20 5 4 Display selection and drop off delay fig 1 21 5 5 Nominal values of the protected transformer fig 2 22 5 6 Thresholds and time delays set up fig 2
12. which can be several times the rated current and with a time constant up to several seconds This transient condition appears as a differential current to the protection relay and it would make the relay trip A relatively high content of second harmonic components is typical for the inrush current while they are nearly absent in case of a short circuit Likewise overexcitation conditions are cause of odd harmonic components 3 and 5 To avoid unsuitable trips on protection relay IDT8N is possible to activate ON OFF and to program in terms of 96 ld two harmonic thresholds on 2 and 5 harmonic components as the 3 harmonic components are often eliminated through the use of delta windings The harmonic stabilization is activated if at least for one of the phases the measured 277 and 5 harmonic content of the differential current exceeds the programmed thresholds when the harmonic stabilization is active the trip related to Id threshold will be blocked 7 SEB Divisione Elettronica e Sistemi GENERAL CHARACTERISTICS The harmonic restrain does not effect the 14 gt gt threshold operation 1 3 Overcurrent thresholds ANSI 50 51 Two overcurrent thresholds are available and actionable to guarantee a back up protection against faults external to the protected transformer or generator transformer unit The function of the overcurrent thresholds is to give an additional protection to the transformer if the fault condition
13. 4 and 5 the references A1 B1 B2 etc identify specific displayed messages in the figures 5 1 Standard display A1 STANDARD DISPLAY It is the standard displayed message without operator s intervention no push buttons pressed for at least 5 minutes or when the RESET push button has been pressed The displayed information is function of the protection relay status NORMAL FUCTIONING During this state the following information can be visualized as defined by set up Protection function ANSI code the display shows the ANSI codes of the main functions 87T 50 Measured current and parameters the display shows one of the measured currents or one of the differential currents IdR 195 IdT or the stabilizing currents IpR IpS IpT the information to be visualized is selected by operator ref C1 The currents are visualized as primary value and or relative value In ON TRIP CONDITION When a trip condition occurs the protection relay visualizes the TRIP message that includes the threshold related to the trip the displayed messages are as the following TRIP TRIP TRIP TRIP Id Ido Ido gt gt The information of the trip as well the glowing of the related LEDs is displayed until the RESET push button is pressed If a new trip condition occurs the displayed information will be updated information related to previous trips are recorded in EVENTS memory FAULT CONDITION When a permanent or temporar
14. E7D programmable E8D non programmable E7D E8D Id gt TA Id XX XX S CCCCCCCC The selection allows to program an additional time delay TA from 00 00 to 99 99 seconds please note that at least one of the digital inputs should be programmed to activate time delay function ref H1 H6 paragraph 5 8 The additional time delay TA is added to the time delay TI to obtain the output relay trip when the TI TA time expires The display E8D shows the digital input programmed to activate the additional time delay TA on the displayed threshold The parameter eeeeeeee can show one of the following values DISABLED none of the digital inputs has been programmed to activate an additional time delay related to threshold Id DIG1 digital input DIG1 activates the TA delay on threshold Id DIG2 digital input DIG2 activates the TA delay on threshold ld DIG3 digital input DIG3 activates the TA delay on threshold Id DIG4 digital input DIG4 activates the TA delay on threshold Id DIG5 digital input DIGS activates the TA delay on threshold Id 0166 digital input DIGG activates the TA delay on threshold Id More than one digital input can activate the same additional time delay e g DIG 1 3 NOTE the additional delay TA will be added only if the TI time delay is at least 50 ms 0 05 s at reference E6D as for safety reason to guarantee proper operation the digital input is filtered at 40 ms 27 SEB Divisione Ele
15. IB n nn In E3D 4 E5D IP IP gt gt cc IP gt gt DI Pl xx P2 xxx nn nn In E1D THRESHOLD IDENTIFICATION non programmable E2D INSENSIBILITY THRESHOLD SET UP programmable n nn value of the threshold programmable from 0 15 to 2 00 In For the value of In please refer to paragraph 1 1 E3D SLOPE OF THE FIRST PERCENTAGE BRANCH programmable Slope of the first percentage branch expressed in terms of 96 slope value of the first percentage branch 0 50 96 E4D ON OFF and SET UP SECOND PERCENTAGE BRANCH programmable ON enabled branch OF disabled branch XXX slope value of the second percentage branch 0 100 96 E5D BASE POINT OF THE SECOND PERCENTAGE BRANCH WITH Id In AXIS programmable Value of the intersection of the straight line P2 with the Id In axis see figure par 1 1 nn nn intersection value expressed in terms of differential current 0 00 20 00 In Example E1D E2D Id IB 0 35 In 26 SEB Divisione Elettronica e Sistemi DISPLAY AND PROGRAMMING E3D E4D E5D IP gt IP gt gt ON IP gt gt DI P1 20 2 555 3 50 1 E6D TIME DELAY SET UP programmable E6D TI eeeee 22 22 5 Set up of time delay to the activation TRIP of the programmed output relays when the measured current exceeds the threshold level zz zz time delay programmable from 00 02 to 99 99 s Example TI INDIP 00 04 s E7D E8D ADDITIONAL TIME DELAY SET UP
16. RS485 and date time C1 display and drop off time D1 D12 nominal values of the protected transformer 10 E8D threshold set up and time delays Id 1 5 threshold set up and time delays Id gt gt E1S E1T harmonic thresholds 1 threshold set up and time delays lp F1A F6A threshold set up and time delays la gt G1 G6 output relays functions H1 H6 digital input functions 51 510 partial trip counters reset The programming sequence is the following 1 SELECT the visualization on display of the parameter to be modified using the arrow push buttons 2 ACTIVATE the PARAMETER MODIFICATION session depressing the ENTER push button and modify the parameter value 3 END the parameter modification session depressing again the ENTER push button 4 REPEAT the procedure from 1 to 3 for all the parameters required to obtain the new protection relay set up 5 CONFIRM the new protection relay set up at the visualization CONFIRM PROG Fig 1 ref J1 within 5 minutes depressing the push buttons ENTER up to visualize YES and ENTER again to confirm NOTE The protection relay continues to operate using the previous set up until the new set up is confirmed as at point 5 above the visualization of the modified parameters before the new set up confirmation is only temporary to allow an easy definition of the new protection set up 11 SEB Divisione Elettronica e Sistemi PROGRAMMING AND
17. allow the multi drop connection up to 31 protection units There are available 2 selectable communication protocols ref B2 paragraph 5 3 When the STANDARD SEB communication protocol is selected the transmission speed is automatically selected between 300 to 9600 bauds and the protocol is ASCII HEX When the MODBUS communication protocol is selected the transmission speed can be programmed between 300 to 9600 bauds ref B3 par 5 3 It is suggested to use a shielded twisted pair AWG22 terminal 19 not connected internally can be used for shields connections 120 Ohm CONTROLLORE PROTEZ 1 PROTEZ 2 PROTEZ 3 It is suggested to terminate the serial line with a resistance 120 O 1 4 W 49 SEB Divisione Elettronica e Sistemi TECHNICAL DATA 7 TECHNICAL DATA Measuring inputs Rated phase current In Thermal withstand continuously Thermal withstand for 1 s Rated frequency Primary CT s current Output contacts ratings Number of relays note 1 Rated current Rated voltage Contact configuration Breaking capability note 2 tripping relays R1 R2 signaling relays R3 R4 R5 note 3 Mechanical life Digital inputs Number of inputs External control voltage Typical current sink Data transmission Standard Communication protocol Transmission speed Optional Auxiliary supply 1A 54A programmable 4 In 100 In 50 60 Hz 1 18500A 4 1 5A 250V change over 0 5 0 2
18. and 14 gt gt and the overcurrent threshold Ip related to the stabilizing current see par 1 3 are referred to the rated current of the protected transformer normalized with the ratio of the installed CT s in order that the value of measured currents on the primary and secondary windings can be directly compared An Un 43 I In TAP An transformer rated apparent power Un transformer rated voltage rated primary current of the CT s installed on the winding side Un SEB Divisione Elettronica e Sistemi GENERAL CHARACTERISTICS Id In Ke ipo d PR Zona di intervento Operating zone Zona di non intervento Non operating zone la In Operating characteristic figure A 1 2 Transformer differential protection ANSI 87T The protection relay IDT8N has been designed to provide three poles percentage biased differential protection function to transformer and generator transformer units 2 WINDING TRANSFORMER For this installation a stand alone IDTS8N relay is available in table A see ref D2 there are the vectorial groups of the transformers which can be protected by the IDT8N stand alone relay SEB Divisione Elettronica e Sistemi GENERAL CHARACTERISTICS The insertion of the protection relay is presented in figure 6 The CT s are installed on both sides of the protected transformer in the case of generator transformer unit the CT s are installed on the HV side of the transformer and on the
19. gt 106 6 as Uaux 2 RS 485 half duplex MOD BUS ASCII 300 9600 baud selectable fiber optic module Range 24 320 Vdc 20 48 230 Vac 20 Frequency Vac 47 63 Hz Burdens min max 5 10W Environmental conditions Operation 10 60 C Transport and storage 25 80 Relative humidity 95 without condensation Protection degree IP 31 mini rack Weight 3 5 kg Note 1 The additional relay R5 is controlled by self test program Note 2 Breaking capability at 110 Vdc L R 40 ms 100 000 operations Note 3 The output contacts of R3 and R4 relays can be configured as signaling or tripping relays SEB Divisione Elettronica e Sistemi TABLE 8 TABLE Table D Settings Insensibility threshold P1 Slope of the first percentage branch Slope of the second percentage branch 87T DI Base point of the second branch Id gt gt Second differential threshold TH2 gt 2 harmonic threshold TH5 gt 5 harmonic threshold Overcurrent threshold primary winding Overcurrent threshold secondary winding Stabilizing overcurrent 0 15 2 00 In 0 50 90 0 100 96 0 00 20 00 In 0 50 20 00 In 10 80 96 10 80 96 0 10 40 00 In 0 10 40 00 In 0 10 40 00 In 0 01 In 196 196 0 01 In 0 01 In 1 96 1 96 Beas 22 Sag All thresholds 87T 50 51 0 02 99 99 5 All thresholds Additional delay 0 00 99 99 s All thresholds ae relay minimum acivatipn 0 10
20. has not been eliminated by protection relays closer to the fault e la primary winding overcurrent threshold side a e b secondary winding overcurrent threshold side b Both thresholds are definite time each threshold delay can be combined with an additional timer controlled by the digital inputs It is also available an additional overcurrent threshold Ip related to the stabilizing current to give an additional protection to the transformer if the fault condition has not been eliminated by other protection relays The overcurrent thresholds la and Ib are referred in terms of the rated current In of the corresponding installed CT s SEB Divisione Elettronica e Sistemi FRONT PANEL KEYS 2 FRONT PANEL KEYS The 5 push buttons on the front panel allow to visualize all the protection parameters and to modify the protection set up gt right arrow down arrow programming session activation or parameter confirmation change or increment of the selected parameter RESET VISUALIZATION OF PARAMETERS reset of the protection relay rif par 4 3 e all visualizations are circular and they can be displayed using the two arrow push buttons e the structure of the visualizations and their contents are showed in Figures 1 2 3 4 and 5 e when the sealable transparent front panel is installed only the arrow push buttons and the RESET push button are accessible to prevent unauthorized modificatio
21. permission of SEB Divisione Elettronica e Sistemi SEB Divisione Elettronica e Sistemi GENERAL CHARACTERISTICS 1 GENERAL CHARACTERISTICS The protection relay IDT8N performs function as three poles percentage biased transformer differential protection relay ANSI 87T to protect transformers or generator transformer units the user can select one or more of the functions listed in the table below Three poles percentage biased differential protection for 87 transformers Three poles overcurrent protection 50 51 The stand alone IDT8N relay performs the function as three poles percentage biased transformer differential protection relay for 2 winding transformers when installed with the AMF3N module it performs the function as three poles percentage biased transformer differential protection relay for 3 winding transformers or 2 winding transformer in 3 ended schemes For 3 winding transformer and 2 winding transformer in 3 ended scheme the protected transformer must have at least one of the windings STAR configured All the set up and measured parameters can be visualized on the front panel display and transmitted on the RS485 communication serial port THRESHOLDS the following thresholds are available e 1 differential percentage biased threshold two branches e 1 absolute value differential threshold e 1 overcurrent threshold for the stabilizing current e 2 overcurrent thresholds one for each winding of the transf
22. star point side of the generator 3 WINDING TRANSFORMER For this installation is required a IDT8N relay and a AMF3N module in table B see ref D2 there are the vectorial groups of the transformers which can be protected by the IDT8N AMF3N system For protected transformer must have at least one of the windings STAR configured An example of the insertion of the protection relay is presented in figure 7 For insertion scheme related to different vectorial group please contact SEB technical department 2 WINDING TRANSFORMER in 3 ended scheme For this installation is required a IDT8N relay and a AMF3N module in table C see ref D2 there are the vectorial groups of the transformers which can be protected by the IDT8N AMF3N system For protected transformer must have at least one of the windings STAR configured An example of the insertion of the protection relay is presented in figure 8 For insertion scheme related to different vectorial group please contact SEB technical department The differential relay IDT8N does not require the use of intermediate current transformers as the phase angle and the current amplitude compensation are carried out by the protection relay itself the compensation is function of the programmed characteristics related to e power transformer nominal data e power transformer vector group e installed CT s characteristics The connection of the power transformer to the network may cause an inrush current
23. threshold la gt DIG4 digital input DIG4 activates the TA delay on threshold la gt DIG5 digital input DIG5 activates the TA delay on threshold la 0166 digital input DIGG activates the TA delay on threshold la More than one digital input can activate the same additional time delay e g DIG 1 3 5 7 Output relays programming fig 3 The session allows to program the activation of the output relays R1 R2 R3 or R4 on START or TRIP conditions for each threshold In the programming session are displayed only the active thresholds depending on selections in the THRESHOLD SET UP paragraph paragraph 5 6 Equivalent information and set up related to relay R1 is available for the relays R2 R3 and R4 just changing the relay identification G1 OUTPUT RELAY R1 QUIESCENT STATUS programmable G1 R1 NORM Programming of the R1 relay status when no START or TRIP conditions are activated none of the measured currents exceed their thresholds NORM OFF normally de energized energized status on activation NORM ON normally energized de energized status on activation R1 NORM OFF G2 G8 OUTPUT RELAY ACTIVATION ON THRESHOLDS 14 gt 14 gt gt TH2 TH5 la and Ib programmable G2 G3 G4 G5 R1 Id Rl Id gt gt R1 2 R1 TH5 32 SEB Divisione Elettronica e Sistemi DISPLAY AND PROGRAMMING G6 G7 G8 R1 R1
24. 1 activates the TA delay on threshold DIG2 digital input DIG2 activates the TA delay on threshold lp DIG3 digital input DIG3 activates the TA delay on threshold lp DIG4 digital input DIG4 activates the TA delay on threshold DIG5 digital input DIGS activates the TA delay on threshold Ip 0166 digital input DIGG activates the TA delay on threshold More than one digital input can activate the same additional time delay e g DIG 1 3 5 6 5 Overcurrent thresholds line currents la gt Ib fig 2 The la threshold refers to primary winding of the protected transformer whilst the Ib threshold refers to secondary winding b of the protected transformer The information and set ups related to threshold la in the following points are effective for the threshold Ib just taking into consideration the change of the threshold identification 30 SEB Divisione Elettronica e Sistemi DISPLAY AND PROGRAMMING F1A ON OFF PHASE OVERCURRENT THRESHOLD programmable Ia cc cc ON enabled threshold OF disabled threshold available but not active F2A THRESHOLD LEVEL SET UP programmable In nn nn threshold level la gt expressed in terms of In of the CT s installed on the a side winding of the protected transformer Ia Ia 06 50 In 12 00 In F3A THRESHOLD LEVEL IN PRIMARY VALUE non programmable Examples Ia XXXXXX XXXXXX thr
25. 8 the more recent event shows a lower number R1 EVENT NUMBER R1 El The index E1 E2 E8 identifies the memorized event The parameter cccccccc gives information on the kind of event and it can show one of the following values NONE no event memorized Id event on trip threshold Id Id event on trip threshold 14 gt gt Ip event on trip threshold Ip 37 SEB Divisione Elettronica e Sistemi DISPLAY AND PROGRAMMING la gt event on trip threshold la gt Ib event on trip threshold Ib STATUS information recorded on external command POWER ON switch on of the protection relay auxiliary power For the events NONE and POWER ON no other information is presented for the other events the following displays give more detailed information on the event R2 TRIP THRESHOLD R2 El 85885 XX XX In It shows the threshold related to the TRIP condition Id gt Id gt gt la Ib of the protection relay and the value of the threshold in relative terms The information is not shown on STATUS or POWER ON events Example El Id 4 60 In R3 R4 R5 PARAMETERS OF THE DIFFERENTIAL THRESHOLDS This information is presented only on TRIP Id event The parameters P1 P2 and DI related to the Id differential threshold are presented the last two parameters only if programmed ON the IP gt gt threshold R3 R4 R5 1 ce El DI P1 xx5 P2 nn nn In Example
26. AL HL dn Las 60 8d Za 9d sd ra S XX XX U SANTVA dOUd 1L LSVALNOI AV IdSIG TWNINON dfl L4S O co LO 14 16 DISPLAY AND PROGRAMMING SEB Divisione Elettronica e Sistemi ni y qdsunol4d OL 5 50ud WHIANOO Lr XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX SINANI 9214 SDIC 2IG IVLIO9IG 9H SH H cH LH WAON va WAON EU WAON cu XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX NYON NOILONAA 15441 dI Ta eI IH dI GHL TA CHL TA lt lt PI PI IH TU SAVINI 69 89 19 99 99 9 co 4 341914 1 17 DISPLAY AND PROGRAMMING SEB Divisione Elettronica e Sistemi
27. ET is pressed the protection relays returns to the standard condition e reset of glowing LEDs 12 SEB Divisione Elettronica e Sistemi PROGRAMMING AND TEST e drop off of tripped relays e reset of any parameter changed but not confirmed parameters are shown as confirmed at the end of the last programming session e display on STANDARD MODE Fig 1 ref A1 par 5 1 4 4 Test of output relays When the output relays test is selected Fig 3 ref G9 it is possible to command an output relay one at the time to trip from the current status allowing functional tests on electrical plants The output relays are activated with the following sequence 1 SELECT THE VISUALIZATION of the desired output relay to be tested TEST R1 OFF 2 PRESS ENTER to activate the test session the message OFF will start to blink 3 PRESS and the message on the display will change as TEST R1 ON 4 PRESS ENTER to command the instantaneous trip of the output relay change of the current status The relay will stay on the new condition until e the or RESET push button is pressed e the ENTER push button is pressed and the sequence at points 3 and 4 is repeated presenting OFF condition The same procedure will be used for R2 R3 and R4 relays 13 SEB Divisione Elettronica e Sistemi DISPLAY AND PROGRAMMING 5 DISPLAY AND PROGRAMMING The contents and the structure of the displayed messages are shown in figures 1 2 3
28. Fig 5 Figure 1 15 DISPLAY AND PROGRAMMING SEB Divisione Elettronica e Sistemi eunDi J 35341914 OL 00000000 w Up Xxx dI VI dI VI IL gar ar 00022222 S 12911 Sz V UI eI VI eI VI IL er eI eI v94 VGA ves Ved Vid 00000000 MERE S ZZ ZZ ur uu uu dI VI dI VI IL dI dI 484 dvd des ded did 2o9 99 GHL 113 ZHL Sid 00000000 S 11911 S ZZzUeZ UT XX XX lt lt VL lt lt VL IL 29 pI lt lt PI 999 drg ded dz 09000000 UI 22722 uu uu uu u 1 5 VI WI IL dI dI dI adr PI G IOSWHHI qoa asa arg aea aea ara u 2277 SEVI dEvi S WL cid X 22272 X 22272 A 0900000 A 999999 A 0900000 XX XXX OAWUL 5141 EN 20 VAN UW Hd
29. IGO vv The status of the digital inputs at the event are displayed The parameter vv can assume the value HI or LO SEB Divisione Elettronica e Sistemi DISPLAY AND PROGRAMMING R35 R36 DATE AND TIME OF THE EVENT El Date 1 Time dd mm yy hh mm ss The date and time of the event are showed 5 11 TRIPS COUNTERS fig 5 In this section are displayed the total and partial counters of the output relay activation on TRIP conditions for each thresholds and the numbers of programming sessions with the date and time of the last confirmed programming session The total counters the number of confirmed programming sessions and the date and time of the last confirmed programming session are not modifiable or resettable the information related to the last programming session are used to control unauthorized access The partial counter can be modified following the standard set up procedure for parameters as described at paragraph 4 2 the partial counters are immediately modified in the memory the recorded values are immediately resetted without the need of the programming confirmation 1 10 TRIP COUNTERS 1 52 Id Id ecc T Display of the partial P and total T counters of the TRIP condition related to each threshold When the value exceed 9999 the counter starts again from 0000 The counters are identified by the threshold name 14 gt 14 gt gt Ip la and Ib there are presented only th
30. ORMER programmable TA1S n A Value of the rated secondary current of the CT s installed in the plant on the primary side of the transformer the value is programmable 1 A or 5 A D9 RATED PRIMARY CURRENT OF THE ON SECONDARY SIDE OF THE TRANSFORMER programmable TA2P 77777 A Value of the rated primary current of the CT s installed in the plant on the secondary side of the transformer the value is programmable from 0001 to 18500 A D10 RATED SECONDARY CURRENT OF THE ON SECONDARY SIDE OF THE TRANSFORMER programmable TA2S n A Value of the rated secondary current of the CT s installed in the plant on the secondary side of the transformer the value is programmable 1 A or 5 A D11 RATED PRIMARY CURRENT OF THE CT ON THIRD WINDING SIDE OF THE TRANSFORMER programmable TA3P ZZZZZ A Value of the rated primary current of the CT s installed in the plant on the secondary side of the transformer the value is programmable from 0001 to 18500 A 25 SEB Divisione Elettronica e Sistemi DISPLAY AND PROGRAMMING D12 RATED SECONDARY CURRENT OF THE ON THIRD WINDING SIDE OF THE TRANSFORMER programmable TA3S n A Value of the rated secondary current of the CT s installed in the plant on the secondary side of the transformer the value is programmable 1 A or 5 A 5 6 Thresholds and time delays set up fig 2 5 6 1 Percentage biased differential thresholds fig 2 E1D E2D Id
31. R3 R4 R5 El El ON El DI 1 20 2 50 2 40 In R6 R7 HARMONIC RESTRAIN THRESHOLDS This information is not presented on STATUS event The harmonic restrain thresholds value and status are presented R6 R7 El ON El OF TH2 15 TH5 15 R8 ACTIVATED OUTPUT RELAYS 38 SEB Divisione Elettronica e Sistemi DISPLAY AND PROGRAMMING 1 RELAY nnnnnnn It shows the list of the output relay activated by the threshold trip 1 RELAY E3 RELAY 1553354 1 4 When no output relays have been activated no relays programmed to TRIP on the threshold the following message will be displayed El RELAY NONE 1 T Tot WWW WW S It is shown the total delay to the TRIP of the output relays from the overcurrent detection when additional delays are activated the change of the status of the digital input that controls the additional delay during the delay itself could bring to a total time different from the sum of the programmed delays If the total time is greater than 999 seconds the display of tenths is omitted Examples R9 TOTAL TIME DELAY ON TRIP When the event is memorized on external command STATUS the message N A Not Applicable is shown instead of the number of seconds El T Tot N A R10 DIGITAL CHANNELS RELATED TO MEMORIZED EVENT 1 DIG dirty xd The list of the digital inputs related to the memorized event is displayed STATUS function command or additional time TA enabled ref par 5 8 If
32. TEST If the new set up is not confirmed within 5 minutes from the last pressed push button the protection relay visualizes again the previous set up the parameters set up that the protection relay is still using 4 2 Howto modify a visualized parameter When the parameter to be modified is visualized on front panel display do the following sequence 1 PRESS ENTER to activate the parameter modification session If one or more parameters are modifiable on the first of them will appear a blinking cursor If no parameters are modifiable no blinking cursor will appear 2 MODIFY THE PARAMETER pressing the arrow push buttons and when two parameters modifiable the push button allows to point out the parameter to be modified the selected parameter will blink gt when numerical parameters are pointed out the push button allows to select the digit to be modified increasing of the parameter a the digits are increased by 1 unit b the other parameters are presented following the selection list 3 PRESS ENTER to end parameter modification session The modification session is ended and the parameter stops to blink NOTE if a numerical parameter is selected out of the accepted range as shown in Table D when the push button ENTER is pressed for few seconds an error message will be displayed as Data Error and the parameter will be displayed again with the former value 4 3 Reset When the push button RES
33. ammed set up e additional time delay related to one or more thresholds e on off thresholds e STATUS function recording of measures on external event e pilot wire fault monitoring only digital input 0162 For each digital input can be programmed the condition that activates the related functions HI voltage gt 20V dc LO voltage 0 10 V dc ac The digital input acquisition is valid when the voltage value stays in the range HI or LO for at least 40 ms DISPLAY OF MEASURES the user can select the continuous display of a measured differential current or of a stabilizing current primary values or relative values all the measured currents can be transmitted to an external controller through the RS485 port EVENTS information related to the last 8 events TRIP or STATUS are recorded in the EEPROM memory Information includes the threshold set up and activated relays TRIP event only the measured currents the digital input status date and time of the event SELF DIAGNOSIS the software includes a non stop monitoring module that controls the functionality of all hardware and software resources of the protection relay Detected fault conditions are reported by e diagnostic message the display e glow of ared LED on front panel e RS output relay drop off The fault condition signaling stays until faults are pointed out by the monitoring module during this condition the protection functions are suspend
34. aph 1 H2 DIGITAL INPUT DIG2 SET UP programmable DIG2 cc Programming of the function related to digital input channel 2 DIG2 the selections available are the same as presented for DIG1 ref H1 plus the following MONITOR activation of pilot wire monitor function H3 H6 DIGITAL INPUT DIG3 DIG6 SET UP programmable H3 DIG3 cc Programming of the function related to digital input channel from 0163 to 6 0166 the selections available are the same as presented for DIG1 ref H1 34 SEB Divisione Elettronica e Sistemi DISPLAY AND PROGRAMMING 59 Parameter values visualization fig 4 L1 L2 L3 L4 L5 L6 L7 THRESHOLDS STATUS L1 L2 L3 Id Id TH2 status status status L4 L5 L6 L7 TH5 Ip gt Ia Ib status status status status The actual status of each threshold is displayed For each threshold are displayed the threshold identification Id gt Id gt gt etc and the threshold status the status can show one of the following values ON active threshold OFF disabled threshold programmed OFF at ref E1 E5 F1 OFF DIG threshold programmed active but momentary disabled by a digital input actual status ref H1 H6 paragraph 5 8 Examples Id gt 2 gt gt 5 OFF DIG OFF X1 X2 X3 X15 VECTORIAL COMPENSATION PARAMETERS X 1 X2 XY3 Yr Xs t In In In EI Parameters related to vector
35. communication serial port when communication is active LED REMOTE glows the operator on front panel can visualize the relay set up but changes of parameters are disabled ENTER and buttons disabled 1 4 X Operation of the differential thresholds The IDT8N relay performs functions as percentage biased differential protection relay the tripping characteristic is presented in figure A A differential protection relay operates on the principle of current comparison and with a healthy protected object the current leaving is the same as that which entered it Any measured current difference is a clear indication of a fault condition within the protected zone Id differential current vectorial difference between the input current and the output current of the protected object Iv Three differential current values are computed one for each phase the differential thresholds are verified for each differential current Ip stabilizing current half sum of the vectors of the input and output currents of the protected object used to stabilize the protection relay operations in presence of faults external to the protected zone 2 1 2 SEB Divisione Elettronica e Sistemi GENERAL CHARACTERISTICS When short circuit currents due to faults external to the protected zone are flowing through the protected object it is possible to have measured differential currents due to current transformer errors or saturation Th
36. ding side indication Winding a input transducers 11 12 13 see figure 6 7 8 Winding b input transducers 14 15 16 see figure 6 7 8 Winding c input transducers AMF3N 17 18 see figure 6 7 8 Ul a 132000 V D5 SECONDARY RATED VOLTAGE OF THE TRANSFORMER programmable U2 b cecece V Example Secondary voltage rated value of the protected transformer the value is programmable from 100 to 400000 V b winding side indication see ref D4 Example Ul 15000 V NOTE in the case of generator transformer unit must be programmed the secondary rated voltage of the transformer D6 THIRD WINDING RATED VOLTAGE OF THE TRANSFORMER programmable U3 ceccce V Secondary voltage rated value of the protected transformer the value is programmable from 100 to 400000 V c winding side indication see ref D4 24 SEB Divisione Elettronica e Sistemi DISPLAY AND PROGRAMMING Example eG lt NOTE in the case of 2 winding transformer in 3 ended installation the voltage must be programmed as the secondary rated voltage U2 of the transformer D7 RATED PRIMARY CURRENT OF THE CT ON PRIMARY SIDE OF THE TRANSFORMER programmable 77777 Value of the rated primary current of the CT s installed in the plant on the primary side of the transformer the value is programmable from 0001 to 18500 A D8 RATED SECONDARY CURRENT OF THE CT ON PRIMARY SIDE OF THE TRANSF
37. e counters related to the active thresholds The partial counters are modifiable in the range from 0000 to 9999 following the standard set up procedure paragraph 4 2 11 13 TOTAL PROGRAMMING SESSIONS AND DATE TIME OF THE LAST PROGRAMMING SESSION TOT PRG DATE PRG TIME PRG eeee dd mm yy hh mm ss Display of the number of confirmed programming sessions from the factory set up and the date and time of the last confirmed programming session 41 SEB Divisione Elettronica e Sistemi INSTALLATION 6 INSTALLATION 6 1 Supplied kit The MR version with minirack is suggested for 2 windings transformer protection only without installation of AMF3N module For all other installations the RK version must be preferred to allow an easy installation of the AMF3N module IDT8N protection relay RK VERSION 19 rack installation the proper rack is supplied by SEB e protection relay module IDT8N with 2 rear sockets e transparent front panel with push buttons e transparent front panel without push buttons e blister with items 1 2 3 4 5 MR VERSION mini rack installation e mini rack e protection relay module IDT8N with 2 rear sockets e transparent front panel with push buttons e transparent front panel without push buttons e blister with items 1 2 3 4 5
38. e stabilizing current is used to stabilize the protection relay operation in these conditions Differential thresholds Two differential thresholds are available ld percentage biased differential threshold Id gt gt second differential threshold absolute value The relay operates when threshold 14 gt gt the following disequation is verified ud gt Id gt gt threshold Id ALL the following disequations are verified 4 gt IB gt Pip gt P2 Ip DI where 1 module of the differential current module of the stabilizing current IB insensibility threshold P1 P2 slopes of the tripping characteristic DI intersection of the P2 straight line with Id In axis The listed disequations define the operating characteristic as presented in figure A and they are verified with all the differential currents and their stabilizing currents related to phase currents The differential threshold 14 gt gt and the second branch of the operating characteristic related to Id threshold slope P2 can be programmed ON OFF All the differential thresholds are definite time 0 02 99 99 s and each of them can be combined with an additional timer controlled by the digital inputs The minimum activation time of the output relay is programmable in order to avoid short commands to switchgears when CT s saturate SEB Divisione Elettronica e Sistemi GENERAL CHARACTERISTICS The differential thresholds 14
39. ed to avoid unsuitable tripping STATUS FUNCTION when the STATUS function is activated by one of the digital input when programmed the protection relay memorizes information related to measured 2 SEB Divisione Elettronica e Sistemi GENERAL CHARACTERISTICS currents and digital input status see par 5 10 EVENTS The recorded information allows an analysis of trip causes in co operative protection relays systems PILOT WIRE FAULT MONITORING when the function is programmed the digital input DIG2 is used to control the correct functionality of the pilot wire Digital input DIG2 is always expected to be complementary of DIG1 input HI LO or LO HI to identify faults on pilot wire The fault condition is reported as detected by the self diagnosis module but the protection functions are not suspended only the functions related to DIG1 digital input are suspended as the DIG1 status cannot be longer considered as true The fault condition is reported when DIG1 and DIG2 signals are not complementary for more then 100 ms REMOTE COMMUNICATION the opto insulated serial port RS485 can communicate with a personal computer or a remote control and monitoring system equipped with an RS485 interface or with a standard RS485 RS232 converter It is possible to select the communication standard between STANDARD ASCII 7 bit Seb protocol or MODBUS ASCII mode SLAVE All the set up and measured parameters can be transmitted on the RS485
40. eshold level expressed in Amperes primary values NON PROGRAMMABLE as function of the primary rated current of the installed CT s ref D6 or D8 for la or Ib F4A TIME DELAY SET UP programmable TI INDIP XX XX S Set up of time delay to the activation TRIP of the programmed output relays when the measured current exceeds the threshold level zz zz time delay programmable from 00 02 to 99 99 s F5A F6A ADDITIONAL TIME DELAY SET UP programmable F5A programmable F6A non programmable F5A F6A TA Ia TA Ia XX XX S CCCCCCCC The selection allows to program an additional time delay TA from 00 00 to 99 99 seconds please note that at least one of the digital inputs should be programmed to activate time delay function ref H1 H6 paragraph 5 8 The additional time delay TA is added to the time delay TI to obtain the output relay trip when the TI TA time expires 31 SEB Divisione Elettronica e Sistemi DISPLAY AND PROGRAMMING The display F6A shows the digital input programmed to activate the additional time delay TA on the displayed threshold The parameter eeeeeeee can show one of the following values DISABLED none of the digital inputs has been programmed to activate an additional time delay related to threshold Id DIG1 digital input DIG1 activates the TA delay on threshold la DIG2 digital input DIG2 activates the TA delay on threshold la DIG3 digital input DIG3 activates the TA delay on
41. force time date to the following condition 01 01 90 00 00 00 5 4 Display selection and drop off delay fig 1 C1 STANDARD DISPLAY SELECTION programmable DISPLAY It allows to select the standard displayed information ref A1 when no trip condition occurs and no fault condition have been detected by the self diagnosis module the available selections are the following ANSI displays of ANSI code IdR displays differential current phase R 19 displays differential current phase S IdT displays differential current phase T IpR displays stabilizing current phase R IpS displays stabilizing current phase S IpT displays stabilizing current phase T la displays current winding a the maximum of the 3 measured values Ib displays current winding b the maximum of the 3 measured values The current is displayed in primary values Selection examples DISPLAY DISPLAY DISPLAY ANSI IdR Ia C2 DISPLAY CONTRAST LEVEL programmable CONTRAST LEV x The display contrast level is programmable from O to 9 The backlighted display is switched off if no push button is pressed for at least 5 minutes when one of the front panel push button is pressed the display is switched on 21 SEB Divisione Elettronica e Sistemi DISPLAY AND PROGRAMMING C3 OUTPUT RELAY MINIMUM ACTIVATION TIME programmable T DROP XX XX S The minimum output relay activation time can be programmed the setting applies to all the outp
42. g and the vector group The allowable selections are the following Table B Primary Secondary side 1 side 2 Y yO d1 d5 411 75 211 1 y5 y7 y11 When a not allowed selection is made at ENTER the message Errore Dati will be displayed 3 winding transformer The first character represents the connection of the primary winding side 1 in the insertion drawing the second field represents the connection of the secondary winding side 2 in the insertion drawing and the related vector group whilst the third field represents the connection of the secondary winding side 3 in the insertion drawing and related the vector group Table C Primary Secondary 37 winding side side 2 side 3 yO d1 d5 47 411 z1 z5 z7 z11 DO nery owas osas nsnm Examples TR TYPE TR TYPE TR TYPE Y y0 y0 Y d1 d1 D yl yl When a not allowed selection is made at ENTER the message Errore Dati will be displayed 23 SEB Divisione Elettronica e Sistemi DISPLAY AND PROGRAMMING D3 RATED POWER OF THE TRANSFORMER programmable An MVA XXX X Value of the rated power of the protected transformer the value is programmable from 0 1 to 999 9 MVA 4 PRIMARY RATED VOLTAGE OF THE TRANSFORMER programmable 01 V Primary voltage rated value of the protected transformer the value is programmable from 100 to 400000 V a win
43. ial compensation The parameters are used to check the proper insertion and programming of the protection relay use of the parameters is reserved to SEB protection relay engineers M1 M2 OUTPUT RELAY STATUS The actual status of each output relay is displayed for each relay the following information is displayed e relay identification R1 R2 R4 e relay status ON activated OFF non activated Note that ON OFF does not necessary mean energized or de energized see ref M1 Example M1 M2 R1 ON R3 OFF R2 OFF R4 ON 35 SEB Divisione Elettronica e Sistemi DISPLAY AND PROGRAMMING N1 N2 N3 DIGITAL INPUT STATUS The actual status of each digital input is displayed For each digital input the following information is presented e digital input identification 0161 DIG2 DIG3 e digital input status HI or LO Example N1 N2 N3 DIG1 LO DIG3 LO DIG5 LO DIG2 HI DIG4 HI DIGG LO P1 P18 MEASUREMENT DISPLAY The actual values of the measured currents differential currents and stabilizing currents are displayed the currents related to disabled thresholds are not displayed For each current the following information is displayed e current or parameter identification e actual values of the currents expressed as In and primary values Amperes e actual value of the harmonic content of the differential currents P1 P2 P3 yyyyy A yyyyy A P4 P5 P6
44. n of the protection set up MODIFICATION OF PARAMETERS e remove the transparent sealable front panel to access ENTER and push buttons SEB Divisione Elettronica e Sistemi FRONT PANEL LED SIGNALING 3 FRONT PANEL LED SIGNALING POWER green FAIL red REMOTE red Id red Id gt gt red gt red auxiliary supply available fault condition detected by SELF DIAGNOSIS software or by PILOT WIRE FAULT MONITORING function communication session active on RS485 port trip condition on Id threshold ANSI 87T trip condition on Id gt gt threshold ANSI 87T trip condition on overcurrent thresholds Ip la and Ib ANSI 50 51 The last trip condition threshold indication is also showed on front panel display more information on trip condition are presented in the recorded EVENT see par 5 10 10 SEB Divisione Elettronica e Sistemi PROGRAMMING AND TEST 4 PROGRAMMING AND TEST The protection relay is easily programmable following the instructions in the next paragraphs e HOW TO PROGRAM THE PROTECTION RELAY e HOW TO MODIFY A VISUALIZED PARAMETER All parameters can be freely modified the proper protection set up as required by the plant management is submitted to the operator s judgment 41 How to program the protection relay The programmable parameters are showed in Figures 1 2 3 4 and 5 at the following references B2 B7 relay address
45. no digital inputs were activated the message NONE is displayed R11 R22 MEMORIZED MEASURED CURRENTS Memorized measured current at the TRIP event the values are expressed as In see paragraph 1 1 and 1 2 R11 R12 R13 El IRa El ISa El ITa nn nn In nn nn In nn nn In 39 SEB Divisione Elettronica e Sistemi DISPLAY AND PROGRAMMING R14 R15 R16 1 IRb El ISb El ITb nn nn In nn nn In nn nn In R17 R18 R19 El IdR El IdS El nn nn In nn nn In nn nn In R20 R21 R22 El IpR El IpS El IpT nn nn In nn nn In nn nn In IRa ISa ITa measured primary winding currents S T side a IRb ISb ITb measured secondary winding currents R S T side b Note the currents related to winding c are not displayed IdR 14 differential currents S T IpR IpS IpT stabilizing currents R S T R23 R28 MEMORIZED HARMONIC CONTENT OF THE DIFFERENTIAL CURRENTS Memorized 2 and 5 harmonic contents of the differential currents at TRIP event the values are expressed as percentage of the measured differential current R23 R24 R25 El TH2R El TH2S El TH2T gg 5 gg 5 gg 5 R26 R27 R28 El TH5R El TH5S El 5 gg 5 gg 5 gg 5 TH2R TH2S TH2T 2 harmonic content of the differential currents S T TH5R TH5S TH5T 5 harmonic content of the differential currents R S T R29 R34 DIGITAL INPUTS STATUS ON EVENT El E E 2161 vv DIG2 vv DIG3 vv El E E DIG4 vv DIG5 vv D
46. ormer The tripping characteristic for the differential thresholds is presented in figure A The available settings for each threshold are listed in Table D TRIP DELAYS All the thresholds are time definite and each threshold time delay TI can be combined with an additional time delay TA the additional time delay is added to time delay TI The additional time delay activation is controlled by the digital inputs The available settings for each timers are listed in Table D OUTPUT RELAYS the IDT8N controls 4 output relays named R1 R2 and R4 these relays can be programmed to be activated on START or TRIP conditions of one or more thresholds START instantaneous activation of the output relay when at least one of the measured current or parameter exceeds the programmed threshold value TRIP activation of the output relay when the programmed time delay or TI TA related to a threshold expires 1 SEB Divisione Elettronica e Sistemi GENERAL CHARACTERISTICS The quiescent state of each single relay R1 R2 R3 and R4 can be programmed as normally energized ON or normally de energized OFF An additional relay R5 normally energized is controlled by the self diagnosis routines to report detected fault conditions Related to each threshold partial and total counters of TRIP conditions are available DIGITAL INPUTS there are available 6 digital inputs to activate the following functions when enabled by the progr
47. sholds has the priority on single threshold selection 33 SEB Divisione Elettronica e Sistemi DISPLAY AND PROGRAMMING H1 DIGITAL INPUT DIG1 SET UP programmable DIGI cc Programming of the function related to digital input channel 1 0161 Parameter cc programming of the condition that activates the function related to digital input DIG1 the condition is selectable between HI and LO Parameter xxxxxxx programming of the function related to digital input DIG1 the following functions are selectable only the active threshold are presented NONE no functions active related to digital input DIG1 TA Id additional time delay on the threshold Id TA Id gt gt additional time delay on the threshold Id TA Ip additional time delay on the threshold Ip TA la additional time delay on the threshold la gt TA Ib additional time delay on the threshold Ib TA ALL additional time delay on all thresholds OF 10 thresholds 14 and 14 gt gt disabled OF Id threshold Id disabled OF Id threshold Id gt gt disabled OF IP gt gt second percentage slope disabled threshold Id OF TH2 2 harmonic restrain threshold disabled OF TH5 5 harmonic restrain threshold disabled OF I thresholds Ip la and Ib disabled OF Ip threshold Ip disabled OF la threshold la gt disabled OF threshold Ib disabled OF ALL all thresholds disabled STATUS activation of status function see paragr
48. ss section 1 5 mm 43 SEB Divisione Elettronica e Sistemi INSTALLATION R S T GERE 0 12 4 8 CEE dre LINE H HET R eue 4 Se 3 EEE BITE KE ene zs Qux Quee as d CBA KE gt gt 6555 Ge zc ne Be F Insertion ANSI 87T 2 WINDING TRANSFORMER fig 6 44 SEB Divisione Elettronica e Sistemi INSTALLATION R s T 12 4 8 IR AMF 3N 81 059 nds ee ds pem se Pe 2 ud IDT 8N cene zu EE pi ei E pnm 5 ps Ho Gm 22 08 1 E HHE eE e m m mm une n te tt m Na i Le qu gp R 5 T 6 12 4 8 12 4 8 gt Insertion ANSI 87T 3 WINDING TRANSFORMER fig 7 45 SEB Divisione Elettronica e Sistemi INSTALLATION R S T 12 4 8 ZI DIG 4 34 IDT 8N cx 82 10 213 a T Ei Re 1 01 R4 T S pae 02 DNE Ce qz WR fiim IR 2 8 ouf 81 23 S 2 5 LINE L E 81 20 3 BI B CB1 22 I I v Too bas R S xd 12 4 8 12 4 8 Sees ANSI 87T 2 WINDING TRANSFORMER 3 ENDED INSTALLATION fig 8 46 SEB Divisione Elettronica e Sistemi INSTALLATION
49. ttronica e Sistemi DISPLAY AND PROGRAMMING 5 6 2 Second differential thresholds 14 gt gt fig 2 E1P E2P Id Id gt gt cc nn nn In E3P EAP E5P TI INDIP TA Id gt gt TA Id gt gt 22 22 S XX XX S CCCCCCCC E1P THRESHOLD IDENTIFICATION non programmable E2P ON OFF and SET UP SECOND DIFFERENTIAL THRESHOLD programmable ON enabled threshold OF disabled threshold nn nn d gt gt threshold value programmable from 0 50 to 20 00 In For the value of In please refer to paragraph 1 1 E3P TIME DELAY SET UP programmable Set up of time delay to the activation TRIP of the programmed output relays when the measured current exceeds the threshold level zz zz time delay programmable from 00 02 to 99 99 s 4 E5P ADDITIONAL TIME DELAY SET UP programmable E5P non programmable The selection allows to program an additional time delay TA from 00 00 to 99 99 seconds please note that at least one of the digital inputs should be programmed to activate time delay function ref H1 H6 paragraph 5 8 The additional time delay TA is added to the time delay TI to obtain the output relay trip when the TI TA time expires The display 5 shows the digital input programmed to activate the additional time delay TA on the displayed threshold The parameter eeeeeeee can show one of the following values DISABLED none of the digital inputs has been programmed to activate an additional time dela
50. ut relays The activation time is programmable from 00 10 to 99 99 seconds T DROP 01 00 s 5 5 Nominal values of the protected transformer fig 2 D1 NUMBER OF WINDINGS programmable Example N AVVOLG YYY Number of windings of the protected transformer the available selection are the followings 2 2 winding transformers 3 3 winding transformers 2 S 2 winding transformers in 3 ended installation D2 TRANSFORMER VECTOR GROUP programmable TR TYPE e eeee Programming of the vector group of the protected transformer 2 windings transformer The first character represents the primary winding type side 1 in the insertion drawing whilst the other characters represent the secondary winding type side 2 in the insertion drawing and the vector group When a not allowed selection is made at ENTER the message Errore Dati will be displayed The allowable selections are the following Table A Primary Secondary side 1 side 2 Y yO d1 d5 411 71 75 21 711 1 5 7 11 40 46 20 26 22 SEB Divisione Elettronica e Sistemi DISPLAY AND PROGRAMMING Examples TR TYPE TR TYPE TR TYPE Y dll Y dl D y5 2 windings transformer in 3 ended installation The first character represents the connection of the primary winding side 1 in the insertion drawing whilst the other characters represent the connection of the secondary winding side 2 in the insertion drawin
51. y fault condition is detected by the self diagnosis module the following message is displayed FAIL F PILOT Detected fault condition on pilot wire the function related to DIG1 digital input is suspended Corrective action verify pilot wire short or open circuit The string eeeeeeee can be 14 SEB Divisione Elettronica e Sistemi DISPLAY AND PROGRAMMING HARDWARE Detected fault condition on hardware or software resources of the protection relay all functions are suspended Corrective action replace the protection relay and contact SEB post sales service 5 2 Visualization structure A1 ANSI ALTERNATIVE FAIL TRIP IRa 87T 50 DISPLAYS eeeeeeee Id XXXXX B1 B2 B3 B4 B5 B6 B7 IDT8N PROTOCOL BAUDRATE NR RELAY SER NR SW REV dd mm yy __ 27777777 22 22 hh mm ss SET UP NOMINAL NOMINAL data VALUES Fig 2 SET UP TRASFORMER DATA set up TRAFO Fig 2 THRESHOL THRESOL set up SET UP Fig 2 RELAYS _ OUTPUT FUNCTION set up FUNCTION Fig 3 DIGITAL DIGITAL INPUTS set up INPUTS Fig 3 J1 CONFIRM PROG MEASURES SIGNAL Display of SIGNALS and OUTPUT RELAYS status amp EVENTS STATUS Fig 4 EVENTS Display of EVENTS data Fig 5 COUNTERS _ Display of COUNTERS data
52. y related to threshold Id DIG1 digital input DIG1 activates the TA delay on threshold Id DIG2 digital input DIG2 activates the TA delay on threshold Id gt gt DIG3 digital input DIG3 activates the TA delay on threshold Id gt gt DIG4 digital input DIG4 activates the TA delay on threshold Id gt gt DIG5 digital input DIGS activates the TA delay on threshold Id gt gt 0166 digital input DIGG activates the TA delay on threshold Id gt gt 28 SEB Divisione Elettronica e Sistemi DISPLAY AND PROGRAMMING More than one digital input can activate the same additional time delay e g DIG 1 3 Example E1P E2P Id gt gt Id gt gt ON 0 90 In E3P E4P E5P TI INDIP Id gt gt Id gt gt 00 02 s 00 00 s DISABIL 5 6 3 Harmonic restrain thresholds TH2 TH5 fig 2 E1S E2T TH2 cc THS cc ee ee 5 Programming of the harmonic restrain thresholds related to the Id differential threshold The thresholds are expressed in terms of percentage of the 2 or 5 harmonic content of the differential current The value of the harmonic content is computed for each differential current related to phase R S T TH2 restrain on 2 harmonic contents TH5 restrain on 5 harmonic contents ON enabled threshold OF disabled threshold ee threshold value programmable from 1096 to 8096 5 6 4 Overcurrent threshold stabilizing current gt fig 2 F1P ON OFF PHASE OVERCURRENT THRESHOLD programmable Ip
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