GE GEK 106168E Power Supply User Manual
Contents
1. 3P NONI SIN INI setting Flsinintersided BF Wihout Current 9 A 39 E 12 o uy SX n c2 b Pim 16 ARCO 4 INTERNO ARC 012 gS 17 8 14 DETECTION uli pi ri 02 N 5 ju MI 18 B4 i 1 3 pole tip W O current N GROUND CURRENT SETING An 3P E7 BF INITIATE EB An 7 DII 1 1 SOBFINTWE Pickup an Di 56 D7 09 cc SOBFINTWIE B gt E4 E5 E6 Am ec 10 C 5 uci lg AJUSTE PHASE LOM 2n 4 15 F 010 VEL 0 TP 1 DE FASE ING 18 BASCULANTE 1 1 VAL n LATCHING RELAY A Aga 0 c MI 12 cs no 1 s wm d 2 812 ba 05 F 0 B2 93 J i 3 Jy n ee is 3 f 6 BASCULANIE ul 5 LAICHING RELAY 3m M IP 1 Ajuste Falta Severo 7 508F IPSefing Severe Fault 3P Setting n L 2 Ajuste 2P Baja Carga E 4 12 Low Load 2P Selling NOTA NOTE 0 MEE ASTE E 8j El2. 5 DB 9 Female onnector Connector LI 2 Pin Pin TX 3 b d 3 TX RX 2 2 RX NOTE DCD 1 4 DTR GND 5 5 GND Leave shield unconnected at se Fee both ends FIGURE 7 RS232 CONNECTION DBF RELAY TO PC DBF MODEM Label DB 9 Male DB 9 Male Connector Connector 2m Pin Pin TX 3 3 TX 2 2 RX NOTE DCD 1 4 DTR Leave shield unconnected 6 DSR at both ends 7 RTS GND 5 5 GND FIGURE 8 RS232 CONNECTION DBF RELAY TO MODEM 58 DBF Breaker Failure Protection 106168
3. 2 OPERATION LOGIC Group Status 5 9 5 10 5 11 5 12 5 13 5 14 5 15 6 1 arallel EEPROM Alarm erial EEPROM Alarm utof Service efault General Settings efault Table 1 Settings efault Table 2 Settings efault Table 3 Settings 2 A Maintenance Alarm Accumulated l2t above limit for Phase A 2 B Maintenance Alarm Accumulated l2t above limit for Phase B 2 C Maintenance Alarm Accumulated 121 above limit for Phase C phum GRAUE ee 21 ctive Table 1 ctive Table 2 ctive Table 3 ee MEM GNU Cmq E New Events Two Stages Set Breaker Pole A Status Breaker Pole B Status CB Pole B Closed reaker Pole C Status CB Pole C Closed Latching Relay 1 Status Optional Exp Board Latched 1 Closed Latching Relay 2 Status Optional Exp Boar Latched 2 Closed 7 10 7 11 7 12 7 13 7 14 7 15 510 541 0 5 21 C 5144 60 7 61 Parallel EEPROM Alarm 64 Default General Settings 6 6 DefautTable2Setings 68 7 es ESC _ 6 11 52 612 52 Maintenance Alarm 613 52 Maintenance eis fo 615 __ 74 NENNEN 76 NewEvents 77 TwoStagesSet 7 8 BreakerPoleAStatus 7 9 Breaker Pole B Status 710 Breaker Pole C Status 712 LatchingRelay2Status pg LS 714 EA s y 821 5 5
4. cerei tens di nde 32 6 8 1 Digital Inputs 5 st ott tat dde at Te Pot ee o Sle Cte i eder do nte Tete dean 32 6 5 2 IRIG B Synchronizing ei Ted E n oT e ole Lo de eee En 32 6 9 FUNCTIONS ste eaten ete enin n teas i en b Ee 33 6 91 50BF TP Unit Fest rai tan t a edet eo uide de ie 33 6 9 2 ORUN TEST tuto e ote e dete nd edat T e Mg de E 34 6 9 3 Internal ArG Test mt e mede daa ve OO oe 35 5694 3P NQOTF UNGTION 3 3 cd tested idee e elle RH e fede e ERE ed or ee de OR e HART is ea 35 106168 Breaker Failure Protection i TABLE OF CONTENTS 6 9 5 Neutral Overcurrent Unit Test s eite 35 6 10 RELAY MEASUREMENT TESTS e ete dal ian aie ae ea hare 37 61 034 Gurrentt Measurement 37 6 10 2 Timing Measuremert eiie de da e pee do lee Aena Ba 37 7 INSTALLATION AND enn nnnm tasa ns sn sn ss ssa annann 39 VER PILIS BE quo ETE 39 7 2 CONNECTION TO GROUND AND DISTURBANCES SUPPRESSION isses rre 39 1 9 MAINTENANGE2 4 CAE UA fu tede se LN 39 8 KEYBOARD AND DISPELAY aa i aed is ceret doled
5. ca e dE 41 8 1 MENU TREE ene E oe oe erae ee Va a ea tie es 42 8 2 SETTINGS GROUP SET KEY e retire ene rie fete eee eset 43 8 3 INFORMATION GROUP 12 202 einen ntn nnns snnt enne snnt assess sns sna 46 8 4 CONTROL GROUP AGT KEY ttti eire ec n BE en Ep a do EE 47 9 5 SINGLE KEY MENU isi cis itti ne foret Eat dta ry ext Rh aane UR ae CO e atten 48 8 6 CONF CURAT ON s better teste a tte lb e ou cse 49 dicic 51 ii DBF Breaker Failure Protection 106168 LIST OF FIGURES LIST OF FIGURES Figure 1 Breaker Failure Logic 189C4114 Sheet 2 Figure 2 External Connections 189C4114 Sheet 1 Figure 3 Front View 226B7412 Sheet 9 Figure 4 Rear View 226B7412 Sheet 10 Figure 5 Dimensions Diagram 226B6086 sheet 10 Figure 6 Panel drilling 226B6086H10 Figure 7 RS232 Connection DBF relay to PC Figure 8 RS232 Connection DBF relay to MODEM 106168 Breaker Failure Protection iii LIST OF FIGURES iv DBF Breaker Failure Protection 106168 1 GENERAL DESCRIPTION AND APPLICATION f GENERAL DESCRIPTION AND APPLICATION 1 1 GENERAL DESCRIPTION The DBF system is a microprocessor based breaker failur
6. GE Power Management eue 25 Digital Breaker Failure Protection DBF Instructions 106168E GE Power Management Anything you can t find Anything not clear enough IF YOU HAVE ANY COMMENT ON THE CONIENIS OF THE PRESENI MANUAL KINDLY FAX US A COPY OF THIS PAGE TOGETHER WITH A COPY OF THE PAGE WHERE YOU HAVE FOUND THE PROBLEM THE FAX NUMBER 34 94 485 88 45 FILLING IN THE QUESTIONAIRE BELOW WE WILL BE HAPPY TO SOLVE YOUR DOUBTS AND WE THANK YOU FOR HELPING US IMPROVE THIS MANUAL Company Name Address Phone Fax E nail Description of your question or suggestion Manual GEK code TABLE OF CONTENTS TABLE OF CONTENTS 1 GENERAL DESCRIPTION AND 1 Tat GENERALE DESGCRIBTIGQN xii atit ei Peas denk eiua ae 1 2 EE 3 2 1 PROTECTION 3 21 TxOVercutrentuhlls 3 2 2 MONITORING AND RECORDING 5 22 1 ctu onte sd EB AA ER 5 2 2 2 Associated Breaker 5 2 2 3 iso toto e TREE DR IE A 5 2 2 4 Circuit Breaker Breaking Capacity Monitoring esses
7. The purpose of these functions is to provide accurate data to perform the circuit breaker maintenance based on the actual breaking time and current values Once this maintenance operation has been done the values for both the t and number of opening operations can be reset In order to be able to take into account the history of the breaker in the case where the breakers were already in use before the installation of the relay the system allows to set an initial value for the t and the number of the previous breaking operations Similarly these values can be adjusted to a given value in order to take into account operations carried out during protection testing 106168 Breaker Failure Protection 9 2 OPERATION LOGIC 2 2 5 BUILT IN SELF CHECKING UNIT The digital technology of the DBF system allows providing a built in self checking function which guarantees the correct performance of the unit and provides an external alarm in case of error detection Two built in self checking functions are performed one when the unit is started up and the other during normal operation Internal tests are provided for power supply program memory ROM working memory RAM oscillography memory RAM and settings and calibration memory EEPROM In addition there is a hardware test for the Target LEDs which lights them all up when the button TARGET RESET is pressed The sealed in targets latched reset if the TARGET RESET b
8. nennen sinn enhn nennen na 9 2 2 5 Built in Self Checking Unit essi seien nee 10 2 3 ANALYSIS EUNGTIONS vie netos inde iita titt 10 eo eso Ct Cd 10 2 8 1 EL E 10 2 4 RA EU E 12 2 4 1 Tables of Settings aiii ie e ba ee 12 2 4 2 Time Synchronization ae ie et NER e TEC e E or 13 2 4 8 Configurable Inputs and Outputs sisi sisse sienne nnns 9 13 2 5 MAN MACHINE INTERFACE sienten rsen nnns 15 2 6 REMOTE COMMUNICATIONS pa rige ree td darti den e e geri ban td pae QR asda AD een Gea mie 16 3 SET TINGS EE 17 4 TECHNICAL CHARACTERISTICS a sana nnne nne 21 AAs MODEL DIST 21 4 311 Special sistens pn o min Opine ni nts m EMO 21 4 2 TECHNICAL CHARACTERISTICS esssesssseseseee sess nnne da dada ss da s dass assa s asd sa as 22 5 HARDWARE DESCRIPTION 222 2 2222 aan UMS crassa sana nM rra naa n uaa 25 521 PHYSICAEC
9. 2 42 A OSE 200 Og GEK 106168E DBF Breaker Failure Protection 45 8 3 INFORMATION GROUP INF KEY On the steady state no communications request the LCD display at the front of the relay shows the following DBF GENERAL ELECTRIC By pressing the INF key the next screen will show STATUS This group provides information about the DBF Press the ENT key to access this group The information displayed is 46 Model of DBF relay Data Base Number Protection Software Version Comm Software Version Phase A Current Phase B Current Phase C Current Neutral Current lt phase A Counter lt phase B Counter lt phase C Counter Number of phase A Openings Number of phase B Openings Number of phase C Openings Type of Logic 2P 3P High set Pickup Status ZA High set Pickup Status ZB High set Pickup Status Low set Pickup Status Low set Pickup Status Low set Pickup Status OC Neutral Pickup Status Initiation Status Initiation Status ZB Initiation Status C 3Pole Initiation Status Arc Pickup Arc Pickup ZB Arc Pickup General 50BF Pickup Status Relay Ready Active Table Number Status of Circuit Breaker OA Status of Circuit Breaker Status of Circuit Breaker C Latching Relay 1 Status Latching Relay 2 Status Local Connection Status Date and Time Status Communications EEPROM St
10. A11 B11 A12 and B12 Group 5 C1 D1 C2 D2 C3 and D3 Group 6 C4 C5 C6 C7 C8 D4 D5 D6 D7 and D8 If the relay has expansion board then the following groups must be added Group 7 E7 F7 E8 F8 E9 F9 E10 F10 E11 F11 E12 and F12 Group 8 E1 F1 22 F2 4 F4 E5 F5 and F6 Apply 2000V gradually between case and groups Apply 2000V gradually between groups GEK 106168E DBF Breaker Failure Protection 29 6 4 RELAY SETTING Introduce the following settings in the relay by means of HMI or GE Local software General Settings Group Value Relay Status IN SERV Identification N A Frequency 50 Hz 60 Hz Phase CT Ratio 1 Neutral CT Ratio 1 Breaker Settings Value Breaker Number N A Kl2t Op Mode Fixed Kl2t INT Time 0 06s KI2t LIMIT 99999 Active Table Set Value Active Table 1 Function Permit Value 5OBF 1P Function No Per 5OBF 3P Function No Per 3P NO INT Funct No Per 50BF Settings Table 1 Value PH Hiset Pickup 2A PH Loset Pickup 1A Neutral Pickup 1A 1 Phase Timer T1 1s 3 Phase Timer T2 1s 3P No I Timer T3 2s BF Logic 3p 2P 2 PHASE Severe Fault 3P Per Low Load 2P No Per N Output Stages 1 27 Stage Timer 2s Internal Arc Settings Table 1 Value Int Arc Pickup 1A Int Arc Timer 1s The specific settings required for each test are indicated other settings do not affect the tes
11. The DBF functionality is related to the following modules Magnetic module CPU board Power supply Keyboard and display 5 2 1 MAGNETIC MODULE The magnetic module performs two essential functions galvanic insulation and scaling analog input signals In the case of current transformers the input current for the primary winding is converted into a scaled voltage in the secondary winding Each current transformer must be linear in the whole measurement range of the relay 5 2 2 CPU BOARD The DBF uses two 16 bit microprocessors operating at a clock frequency of 20 MHz One of these microprocessors is used to perform the relay communications and the other performs the necessary calculations for protection functions general the microprocessors are responsible to perform the input and output calculations and operations at very high speed The use of two microprocessors is especially recommendable to make the protection and communication functions independent of each other inside the unit itself and therefore increase the reliability of the system The analogue digital converter converts the voltage inputs into their digital equivalent with a resolution of 10 bits The unit code is stored in non volatile EPROM memory while the settings and events are stored in EEPROM memory The data related to the oscillography is stored in RAM memory which is maintained using a capacitor thus avoiding the loss of information when the unit i
12. 0 A Description LL LL LL T 1 rcommintrface ______ P2 RS232 5232 85232 Plastic F O RS232 Glass F O P2 RS232 P3 RS485 Ll Ll ll T Ranges j jj SeTabletR L T T LL T T Comm Protocois ___ T Pt P2 l2 P2 Mink ModBus ee H m lof board PowrSuply ______ eRe er 110 250 VDC 3314 ofo _ 5 1 A Revision J J J TABLE 1R RANGES moos B D E F 6 PHASE 12A 0 2244 1 12 1 12 1 12A 0 56A 0 5 6 GROUND 142A 0 2 2 4A 0 2 2 4A 0 5 6A 0 1 1 2A 0 2 2 4A 0 1 1 2 A 4 1 1 SPECIAL MODELS The input voltage of the standard model corresponds to the Power Supply voltage The following models have been developed to allow the selection of an input voltage independently of the Power Supply The following codes should be placed as two last digits before A in the ordering code for selecting the desired characteristics MOD 04 MOD 05 MOD 06 MOD 07 V inputs 48 20 V inputs 110 20 V inputs 125 20 V inputs 250 20 Example If we want to order a rela
13. an internal event or an AND gate of internal events to an LED The LED can be configured to have memory if Vdc is removed or the event causing the operation of the LED gets deactivated or not and to blink or to be steady The internal events must be previously defined using the internal signals of the relay It is possible to use AND OR and NOT logic gates to define these events The available internal signals are listed in the following table The TARGET RESET button allows testing all target lamps if it is pushed for a short time lighting up all of them or resets the sealed in targets if it remains pressed for three seconds or more Please refer to INTRO configuration software Instruction book GEK 105594 for further information INTERNAL PROTECTION STATUS SIGNALS Program Initiate Settings change Write Counters onfiguration Change xternal Trigger Oscillography triggered by Dig Input ommunications Trigger eset Operation ITI nput N 1 nput N 2 put 3 4 put 5 put 6 Group 12 13 140 1412 1418 Tie EEES 20 271 24 106168 DBF Breaker Failure Protection 5 2 OPERATION LOGIC Optional Exp Board 2 8 3 c 2 10 2 10 9 2 11 2 12 2 13 214 Input 13 2 15 nput 14 3 0 Breaker Failure Logic 3 1 Hi Set A Pickup 3 2 Hi Set B Pickup Output of Hi Set current
14. close the auxiliary relay D2 C2 according to the factory default output configuration Reset of Latching Relays The DBF breaker failure protection may be ordered with an expansion board which includes two latching relays that are operated in different ways depending on the number of steps selected for additional reference see Figure 1 and will fix the tripping output once the breaker failure function has operated A digital input through F11 F12 factory default inputs configuration pulse signal not sustained resets these latching relays to its steady state position 4 DBF Breaker Failure Protection 106168 2 2 MONITORING AND RECORDING FUNCTIONS 2 2 1 MEASUREMENT The DBF system provides the continuous measurement of phase and ground current values These measurements can be accessed directly on the liquid crystal display HMI on the front of the relay or via the GE LOCAL communication software 2 2 2 ASSOCIATED BREAKER STATUS The DBF system monitors the associated breaker status through the digital inputs 52 b or 52 a and it is displayed on the local HMI or through the communications software 2 2 3 TARGET LAMPS The DBF incorporates 17 LED target lamps one fixed LED two colors assigned to the system ready function and 16 user configurable red LEDs These configurable LEDs are arranged in two columns of 8 LEDs each The configuration is done using the GE INTRO software and it consists on assigning
15. consists of the main body and a covering lid The main body of the case contains the blocks of terminals necessary to carry out the external connections and guides to support the trays that contain the internal parts of the relay The trays can be pulled out in order to make easy the maintenance and servicing of the relay 5 1 2 ELECTRICAL CONNECTIONS All the electrical connections for current channels digital input and output relays are made using the terminal blocks fixed to the rear part of the case The connections required for communications are made using three DB 9 serial connectors one on the front and two on the rear when using communication option RS 232 One of these connectors is replaced by the corresponding fiber optic connector in models including this option 5 1 3 INTERNAL CONSTRUCTION Internally the DBF unit is divided into 2 trays and a case The case with the blocks of terminals is described above The lower tray carries the magnetic module and a printed circuit board which contains the power supply the digital inputs and also the trip outputs and auxiliary outputs on the basic version model without expansion board The upper tray carries the board with the protection system CPU and the communications This tray can also carry as an option the input and output expansion board The front panel consists of a covered keyboard and a board which carries the alphanumeric display the LEDs and the Reset button The mode
16. the fixed mode is selected it is necessary to set then the kl2t Integration Time In this case the time used will be always the set time should be the rated operating time of the circuit breaker provided by the manufacturer 4 The Pre Fault Cycles to be shown in every oscillography record may be adjusted from two to ten 2 10 In any case the total number of cycles for any oscillography record is 66 regardless of pre fault cycles setting 5 The difference between the function permission and permitted trips settings is e The function permission setting enables or disables the function e The trip permission setting allows to enable or disable any specific function to trip but keeping always active the function providing thus capability to generate events alarms and signals 6 The overcurrent ranges shown in Table 3 correspond to models of 1 12A for phase and 0 5 6A for ground for 5A rated CT s Only PH Lo Set Pickup PH Hi Set Pickup and Neutral Pickup settings change with the range 7 Sometimes the names used to describe the settings for both the local HMI and the communications program are short or abbreviated This is because of the space limitation imposed by text windows in the program 106168 Breaker Failure Protection 19 3 SETTINGS 20 DBF Breaker Failure Protection GEK 106168E 4 4 TECHNICAL CHARACTERISTICS TECHNICAL CHARACTERISTICS 4 1 MODEL LIST Position DBE 1 1 1 0
17. uso de logica basada en contactos La confguracon de errans ALTO DE FASE 2 Ajuste 52 52 es seleccionable configuracion de entradas mostrade es configuracion PHASE HIGH MS por detecto recolzada en LEVEL SETTING 35 Seting E or 32 logic may be selected by the inputs configuration n 5 The inputs configuration shown is the default contiguration TIPO FALLO 1 8 BF LOGIC 3P 2P done at factory mp 112 uy RESET 52 FIGURE 1 BREAKER FAILURE LOGIC 189C4114 SHEET 2 DBF Breaker Failure Protection GEK 106168E FIBRA OPTICA CRISTAL O PLASTICO FIBER OPTIC GLASS OR PLASTIC AAA Lo To gt I gt gt I I gt co ot Ir Alo ARRANQUE o BF PICK UP DISPARO 1 1 DISPARO 2 TRIP 2 INTERNAL ARC ALARMA EQUIPO SYSTEM READY O DISPARO 1 o TRP1 DISPARO 1 o TRIP 1 DISPARO 2 TRIP 2 DISPARO 2 2 ARRANQUE B F PICKUP O DISPARO 1 TRIP 1 DISPARO 1 o 1 O DISPARO 1 o TRIP 1 O DISPARO 2 o 2 DISPARO 2 O DISPARO 2 TRIP 2 SALIDAS CONFIGURABLES CONFIGURABLE CONTACTS 2 NOTE 4 RELES B
18. without condensation 16A 4000VA 25A for 4 sec 8 ms or less 9A at 30V 0 65A at 100V 0 5A at 30V 0 5 VAatl 25A 0 1 VAatl 12 W idle state 16 W all relays activated 8 mA 1 W at 125 VDC 596 5 or 30ms whichever is greater Class E 5 as per IEC 255 4 196 2 or 30 ms whichever is greater GEK 106168E 4 TECHNICAL CHARACTERISTICS COMMUNICATIONS RS232 using DB9 female connector 2 3 connectors depending on model Mode Half duplex 1 mm plastic fiber optic depending on model Typical power output Receiver sensitivity Numeric aperture N A Wave length HFBR 4516 type connector 8dBm 39dBm 0 5 660 nm visible red Glass fiber optic 62 5 125 depending on model Typical power output Receiver sensitivity Numeric aperture N A Wave length SMA type connector STANDARDS 17 5 dBm 25 4 dBm 0 2 820 nm near infrared The DBF system complies with the following standards which include the GE insulation and electromagnetic compatibility standard and the standards required by Community Directive 89 336 for the EC market in line with European standards It also complies with the European directive requirements for low voltage and the environmental and operating requirements established in ANSI standards C37 90 IEC 60255 5 IEC 60255 6 and IEC 68 Test Insulation test voltage Impulse voltage 1 MHz interference Electrostatic discharge Immunity to radio i
19. 0 0 5 5 54 86e 87 7 88 106168 DBF Breaker Failure Protection 7 2 OPERATION LOGIC Comment 8 11 8 12 8 14 8 15 0 BR OO PO 9 7 9 10 9 11 9 12 9 13 9 14 9 15 10 0 10 1 Output of internal AND gate 2 10 2 Output of internal AND gate 3 10 3 Output of internal AND gate 4 10 4 Output of internal AND gate 5 10 5 Output of internal AND gate 6 10 6 Output of internal AND gate 7 10 7 Output of internal AND gate 8 10 8 utput of internal AND gate 9 10 9 utput of internal AND gate 10 10 10 utput of internal AND gate 11 10 11 utput of internal AND gate 12 10 12 utput of internal AND gate 13 10 13 utput of internal AND gate 14 10 14 10 15 INTERNAL COMMUNICATION STATUS SIGNALS Group Serial EEPROM Alarm Failure in serial EEPROM Comm Settings Relay with factory default settings Protection Link Status of internal comm with protection CPU IRIG B Link Relay synchronized by IRIG B 8 DBF Breaker Failure Protection 106168 0 1 2 0 1 2 4 2 OPERATION LOGIC Group Comment 4 0 4 15 The DBF units are supplied with the following target LED s default configuration LED LEFT COLUMN LED RIGHT COLUMN 1 TRIP STAGE 1 9 LOW SET PICKUP 3 PHA
20. 8 6 CONFIGURATION MENU The DBF has a configuration unit which can only be accessed by means of the keyboard To enter the configuration start from the main screen DBF GENERAL ELECTRIC and use the keyboard to enter a four digit code If the code is correct the access to the configuration unit is permitted If not it returns to the main screen The code is unique for all the DBF relays and is not intended to be a password but rather a simple safety measure to avoid accidental changes to the configuration This code is 7169 chosen to coincide with the ASCII code for the initials GE After pressing 7169 at the front keyboard and scrolling with the arrow keys the following information will appear BAUDRATE The speed in bauds which the DBF will use for serial communications through the remote port The possible speeds are between 1200 and 19200 bauds e NET STOP BITS The number of stop bits which are added to each byte which is transmitted the serial line It is treated as a binary logic setting selected by means of the logic key 1 Y for 1 and S N for 2 LOC BAUDRATE as above but for local communications LOC STOP BITS As above but for local communications LOCAL SETTINGS Settings changes by local communications allowed not allowed REM SETTINGS Settings changes by remote communications allowed not allowed LOC OPERATIONS Operations being performed by local communications computer d
21. A to terminals B3 B4 neutral 106168 Breaker Failure Protection 35 6 ACCEPTANCE TESTS 8 Check that after NO TIMER T3 2s the following contacts are closed A12 B12 C1 D1 C4 D4 C6 D6 C5 D5 C7 D7 9 If the relay is provided with an expansion board check that also the following contacts are closed 1 1 2 2 4 4 5 5 E6 F6 36 DBF Breaker Failure Protection 106168 6 10 RELAY MEASUREMENT TESTS 6 10 1 CURRENT MEASUREMENT Change setpoint GENERAL FUNCTION PERMIT 50BF 1P FUNCTION to PER Change setpoint GENERAL FUNCTION PERMIT 5O0BF FUNCTION to NO PER Change setpoint GENERAL FUNCTION PERMIT 3P No INT FUNCT to NO PER Change setpoint TABLE 1 50BF SETTINGS PH LOSET PICKUP to 5A 1A in relays with 1A nominal current Change setpoint TABLE 1 50BF SETTINGS 1 PHASE TIMER T1 to 0 050s Change setpoint TABLE 1 50BF SETTINGS N OUTPUT STAGES to 1 Energize digital input 3POLE BF INITIATE terminals E7 E8 for relays with expansion board If the relay has not expansion board energize CC1 PHASE A BF INITIATE 8 Increase current applied on A1 A2 phase A until contact A12 B12 closes Check that the operating value of the current is within 5 of setpoint for relays with nominal current and for nominal current relays 9 Repeat step 8 applying current on B1 B2 phase B If the relay has not an expansion b
22. ASCULANTES LATCHING RELAYS NOTA 4 SOLO EN TARJETA EXTENSORA OPCIONAL NOTE 4 ONLY IN OPTIONAL EXTENSION BOARD PUERTO 1 DELANTERO FRONT PORT 1 PUERTO 2 TRASERO REAR PORT 2 NOTA 3 NOTE 3 PUERTO 3 TRASERO REAR PORT 3 INTERFACE SELECCIONABLE INTERFACE SELECTABLE FIGURE 2 EXTERNAL CONNECTIONS 189C4114 SHEET 1 A _ am il J Me iom POWER SUPPLY oA d INICIO F FASE 209 PHASE BF INITIATE INICIO F FASEB 009 PHASE B BF INITIATE INICIO SCIO PHASE C BF INITIATE COMUN ENTRADAS D10 INPUTS COMMON o meg oM s2fc 0012 COMUN ENTRADAS D12 INPUTS COMMON INICIO FJ TRIFASICO E7 3 POLE BF INITIATE NO USADA NOT USED COMUN ENTRADAS NOTA 2 INPUTS COMMON 059 NO USADAS ITRADAS NOT USED COMUN ENTRADAS INPUTS COMMON SELECCION TABLA ACTIVA 0 10 TABLE 0 SELECT SELECCION TABLA 1 FIO ACTIVE TABLE 1 SELECT COMUN ENTRADAS GROU INPUTS COMMON TRIGGER OSCILOGRAFIA 2 OSCILLOGRAPH TRIGGER REPOSICION BASCULANTE of 12 LATCHING RELAY RESET COMUN ENTRADAS F11 INPUTS COMMON 1 PUESTA TERRA LADO lt RECOMENDADO POR SEGURIDAD A8 DE PERSONAS Y EQUIPOS ag NOTE i GROUND AT RELAY LOCATION RECOMENDED FOR SECURITY OF PERSONNEL AND EQUIPMENT NOTA 2 VALORES POR DEFECTO CONFIGURABLES POR EL USUARIO NOTE 2 DEFAULT SETTINGS USER CONFIGURABLE NOTA 3 PUERTO 3 INDE
23. DESCRIPTION1 edet 25 Case ocu E Rte e tien nimis 25 51 2 Electrical CONNCCHONS o len dade PE ved 25 5 1 3 B PER 25 5 2 OPERATING 16 t fe d IL EI hi iot ec A UNS 27 2 21 Magnetic Module eb bt teo RE eoe e e to eie Dod tos 27 52 2 GPUI BOaId us t ERE pn 27 52 8 Power SUDDIV oett ect e Gas Se ay ied a Seuss 28 5 2 4 Keyboard and BISplay tette oe Te t eom ete t e n eto t tos 28 6 ann ck eke ni an 29 6 1 CONNECTIONS AND NECESSARY EQUIPMENT 2 2 0 00 00000 000000001000000000000000000 000 2 29 E 29 6 3 6 29 6 4 RELAY 30 6 5 INBIGATORS t elu in AS AE LL Md ares 30 6 6 POWER SUPPLY e tt tete tes 30 6 7 COMMUNICATION Siionin aa tai em e ENS 31 0 8 INPUTS
24. IMER 1 2 0 05 2s LE 1 LE 1 0 05 1A 0 1 2 0 5 INTERNAL SET 2 Same than for TAB LE 1 INTERNAL ARC SET T 3 Same than for TAB LE2 To change any setting the procedure is as follows 44 Press the SET key Select the option MODIFY SETTINGS using 74 arrow keys Press ENT key Select the required setting group in the menu tree with arrow keys Press ENT key Select the required specific setting with 74 arrow keys ENTER the value to be modified or select the required value from the list of available settings using right left arrow keys Press the ENT key Press the END key The relay will request confirmation of the change by means of the following message CONFIRM Y N To confirm the change press the 1 key If not press S N The relay will then show the following message on the screen LCD SETTINGS CHANGE EXECUTED Press the CLR key four times to return to the main first screen rest DBF Breaker Failure Protection GEK 106168E 8 KEYBOARD AND DISPLAY If the setting entered is outside the limits of the valid range the relay will not accept the change and will show the following message SETTING OUT OF RANGE Some settings do not accepts numeric values instead of that different possibilities will be shown by pressing left right arrow keys To perform MODIFY OF PROTECTION COUNTERS the available menus are Level 2
25. Local settings change allowed REMOTE SETTINGS Remote settings change allowed LOCAL OPERATION A Local operations allowed REMOTE OPERATIONS Remote operations allowed UNIT NUMBER Number of the unit PASSWORD View Change comm Password t TIME OUT Max t between 2 synch signals only for relays in DDS integrated systems ENT z 5 m N 2 m m gt 0 D a ES 3 c o E c o S 42 Breaker Failure Protection 106168 8 2 SETTINGS GROUP SET KEY This group allows to see and modify the DBF settings It is accessed by pressing the SET key when the DBF is in steady state When the SET key is pressed the following message appears on the screen VIEW SETTINGS PROTECTION When the UP DOWN arrows are pressed the message changes to And the last UP DOWN action gives MODIFY SETTINGS PROTECTION MODIFY COUNTERS PROTECTION For the above windows the menu tree is shown in the following tables Note that to go down a level in the tree the ENT key must be pressed and the CLR key to go up Level 1 Level 2 Level 3 Level 4 RELAY STATUS In Out of service IDENTIFICAT 20 characters GENERAL SETTINGS 50 60 Hz PHASE RATIO 1 4000 GROUND CT RATIO 1 4000 BREAKER NUMBER 4 digits Kl2t OP MODE Fixed Measuring BRERKEPLSETTINGS Kl2t INT TIME 0 03 0 25 s Kl2t LIMIT 1 999999 kA2s ACTIVE TABLE SET ACTIVE TABLE 1 3 o PREFAULT C
26. PENDIENTE DE DE PUERTOS 1 Y 2 Bio PUERTO 1 PRIORITARIO SOBRE PUERTO 2 NOTE X PORT 3 15 INDEPENDENT OF PORTS 1 AND 2 PORT 1 HAS PRIORITY OVER PORT 2 DBF Breaker Failure Protection 53 54 AJ a p TARGET RESET y d F D 1 O LED ED 6 LED N92 LED N LED 4 LED N95 LED 14 LED D N 15 LED 8 4 LED N LE Li E LED N TRADEMARK OF GENERAL ELECTRIC COMPANY USA ciini n 9 goana amp MODEL SMOR 11C1M111H00B FIGURE 3 FRONT VIEW 226B7412 H9 DBF Breaker Failure Protection GEK 106168E FIGURE 4 REAR VIEW 226B7412H10 55 DBF Breaker Failure Protection GEK 106168E DIS 6 292 Sort 202 5 N 9 1 FIGURE 5 DIMENSIONS DIAGRAM 226B6086H10 56 DBF Breaker Failure Protection GEK 106168E OINILNNOW 404 SNOISNAWIG JCVLNONW OdVeOsYAd uiu NI SNOISN3NIG SANOISNAWIG 6 9 AA ONITIIMO H04 Z9 dO SdIOH 7 SPVLNOW Vsvd Z 34 5 v 06 FIGURE 6 PANEL DRILLING 226B6086H10 57 DBF Breaker Failure Protection GEK 106168E
27. PRESSION The terminal see Figure 2 should be connected to ground so that the disturbance suppression circuits in the system works correctly This connection should be as short as possible preferably 25 cm or less to guarantee maximum protection In this way the capacitors that are internally connected between the inputs and ground divert high frequency disturbances directly to ground without passing through the electronic circuits Then the internal circuitry is perfectly protected In addition this connection also guarantees the physical safety of the personnel when handling the relay since the whole casing is connected to ground 7 3 MAINTENANCE Given the important role that the protection relays play in the operation of any installation a periodic program of tests is highly recommended The unit incorporates built in diagnostic functions that permit the fast identification of some of the most likely circuit failures Testing the unit is recommended at intervals of 2 years or more Although the built in diagnosis does not reduce the average time between failures it does increase the availability of the protection because it allows a drastic reduction in the average interruption time involved in detecting and repairing the fault The set of tests which can be performed to test that all aspects of the DBF unit function properly is described in detail in the chapter entitled ACCEPTANCE TESTS Since most of the protection and communications
28. SE A TRIP 11 POLE B INIT 5 PHASE C TRIP 13 INT ARC A POLE e SPTRIPNOT 34 INT ARCBPOLE 7 INT ARC TRIP 15 INT ARC C POLE HIGHSETPICKUR 16 REMOTE COMMUNICATIONS 2 2 4 CIRCUIT BREAKER BREAKING CAPACITY MONITORING To supervise the breaker health the DBF system calculates and stores for each operation the accumulated values of the square of the current multiplied by the opening time of the breaker Ft on each phase t is expressed in kA sec The value 14 is accumulated and stored independently for each phase These values can be accessed either by the local HMI or by the GE LOCAL communications software The function has an Integration Time Selector setting OP MODE which can be used to assign a fixed opening time given by another setting INT TIME Otherwise the unit measures the time between the tripping signal of the main feeder protection and the change of the status contacts of the circuit breaker 52 b The total Breaking Current Limit LIMIT setting fixes the maximum life breaking capability it is recommended to set this to the limit supplied by the manufacturer When this threshold is reached in any phase the system may be configured to close an output if the appropriate internal signal 52 A Maintenance Alarm 52 B Maintenance Alarm 52 C Maintenance Alarm is assigned to an output In addition the system also has a counter for the tripping operations
29. YCLES 0 4 S PICKUP ENABLE DISABLE 1 STAGE ENABLE DISABLE m 2 STAGE TRIP ENABLE DISABLE o INTERNAL ARC ENABLE DISABLE A TRIP ENABLE DISABLE B TRIP ENABLE DISABLE C TRIP ENABLE DISABLE 5 3P TRIP ENABLE DISABLE A EXTERNAL TRIGGER ENABLE DISABLE gt COMM TRIGGER ENABLE DISABLE HI SET A PICKUP ENABLE DISABLE gt 9 HI SET B PICKUP ENABLE DISABLE 5 HI SET C PICKUP ENABLE DISABLE 2 A INIT ENABLE DISABLE 5OBF B INIT ENABLE DISABLE 5OBF C INIT ENABLE DISABLE LO SET A PICKUP ENABLE DISABLE LO SET B PICKUP ENABLE DISABLE LO SET C PICKUP ENABLE DISABLE 3 POLE 50BF INIT ENABLE DISABLE NEUTRAL PICKUP ENABLE DISABLE ARC A PICKUP ENABLE DISABLE ARC B PICKUP ENABLE DISABLE ARC C PICKUP ENABLE DISABLE GEK 106168E DBF Breaker Failure Protection 43 8 KEYBOARD AND DISPLAY BF LOGIC 3P 2P SEVERE FAULT 3P LOW LOAD 2P N OUTPUT STAGES 2 STAGE TIMER Level 1 Level 2 Level 3 Level 4 5OBF 1P FUNCTION PERM NON PERM EE 3P FUNCTION PERM NON PERM 3P NO INT FUNCT PERM NON PERM PH HISET PICKUP 1 0 12A PH LOSET PICKUP 1 0 12A NEUTRAL PICKUP 0 5 6 0A 1 PHASE TIMER T1 0 05 2s 3 PHASE TIMER T2 0 05 2s SETTINGS T1 3P NO I TIMER T3 0 05 2s 3 PHASE 2 PHASE PERM NON PERM PERM NON PERM 50 BF SETTINGS T2 Same than for TAB 50 BF SETTINGS T3 Same than for TAB INTERNAL ARC SET T1 INT ARC PICKUP INT ARC T
30. aker Failure Protection 17 3 SETTINGS Common to all tables _ Defaut Hi Set A Pickup Enable Disable Enable A Init Enable Disable Enable Non Permitted Settings PH Hi Set Pickup 1 12A 0 01A PH Lo Set Pickup 1 12A 0 01A 0 01s Phase Timer T2 00525 15 005 3PNolTimrT3 00525 29 oos Output Stagesnumber 1 2 1 2ndStageTimer 00655 2s 005 Internal Arc Settings Internal Arc Pickup 0 05 1A 0 01A Internal Arc Timer 0 10 2s 0 01s A A A 1s 25 1 25 gt 18 Breaker Failure Protection 106168 3 SETTINGS COMMENTS ON SETTINGS 1 The Identification setting allows the user to input a name for the unit for example the name of the line or feeder with a maximum of 20 ASCII characters 2 The Active Table setting allows selecting the table to be active during normal operation among the three tables available on the DBF This selection can also be done by means of digital inputs configured for this purpose The table input selection has priority over the table setting selection if the input has been configured to perform change of tables 3 To set the breaker monitoring function it is necessary to set first the kl2t OP Mode setting If this is selected as measured no other setting is required since the time used for the calculation is the time taken by the unit during the interval trip order 52 b contact to close If
31. als A3 A4 with digital input CC6 52 b C oD 6 9 4 3P I FUNCTION Change setpoint GENERAL FUNCTION PERMIT 5O0BF 1P FUNCTION to NO PER Change setpoint GENERAL FUNCTION 5 FUNCTION to NO PER Change setpoint GENERAL FUNCTION PERMIT 3P No INT FUNCT to PER Change setpoint TABLE 1 50BF SETTINGS N OUTPUT STAGES to 1 Change setpoint TABLE 1 50BF SETTINGS 3P NO I TIMER T3 to 1s Change setpoint TABLE 1 50BF SETTINGS LOW LOAD 2P to PER Energize digital input CC7 3P BF INITIATE If the relay has not an expansion board energize CC1 PHASE A BF INITIATE and CC2 PHASE B BF INITIATE 8 Check that after NO TIMER 25 the following contacts are closed 4 4 12 12 C5 D5 C1 D1 C6 D6 C7 D7 9 If the relay is provided with an expansion board check that also the following contacts are closed E1 F1 E2 F2 E4 F4 E5 F5 E6 F6 6 9 5 NEUTRAL OVERCURRENT UNIT TEST Change setpoint GENERAL FUNCTION PERMIT 50BF 1P FUNCTION to NO PER Change setpoint GENERAL FUNCTION PERMIT 50BF FUNCTION to NO PER Change setpoint GENERAL FUNCTION PERMIT 3P No INT FUNCT to PER Change setpoint TABLE 1 50BF SETTINGS LOW LOAD 2 to PER Energize digital inputs CC4 CC5 and CC6 52b inputs Energize digital inputs CC7 BF INITIATE If the relay has not an expansion board energize digital inputs CC1 PHASE A BF INITIATE and CC2 PHASE B BF INITIATE 7 Apply 2
32. and 4 groups of 2 inputs with one common in each group See the external connections diagram for additional reference One of the following meanings can be assigned to any input For more detail about the configuration of the inputs see GE INTRO Instruction Book Unused input 50BF Initiate A 50BF Initiate B 50BF Initiate C BF Initiate 52a pole A 52a pole B 52a pole C 52b pole A 52b pole B 52b pole C Latching Relays Reset External Trigger Active Table Select 0 Active Table Select 1 rr uurrrrrrrrrr L indicates Level input P indicates Pulse input 106168 Breaker Failure Protection 13 2 OPERATION LOGIC 2 4 3 2 Outputs The basic DBF system has 10 outputs as follows 2 tripping contacts A12 B12 and C1 D1 1 Breaker failure pickup signaling A11 B11 1 Internal arc detection C2 D2 1 Equipment alarm C3 D3 5 configurable contacts C4 D4 to C8 D8 The optional expansion board for the DBF provides 6 additional latched contacts E1 F1 to E6 F6 This outputs are not configurable and are assigned as follows e tripping contacts TRIP 1st Stage E1 F1 to E3 F3 e 3 tripping contacts TRIP 2nd Stage E4 F4 to E6 F6 The configurable outputs can be programmed using logic based on the internal protection states pick ups trips alarms etc The DBF has 66 different internal states and these can be used to carry out logical operations NOT AND and OR which gives the unit a gre
33. at flexibility The output configuration is done using different levels At the first level it is possible to use AND gates of up to 16 signals The output is incorporated into the states matrix so that it can then be used in other AND gates of up to 16 inputs This process can continue until the 16 ANDs are used Once the AND gates have been configured it is possible to create a second level with OR gates of 16 inputs limited to the established groups of bytes and whose logical outputs are assigned to physical outputs of the unit This means that we can configure the physical outputs with any internal signal from the status or any combination of them made by means of the AND logic gates 14 DBF Breaker Failure Protection 106168 2 5 MAN MACHINE INTERFACE The DBF system includes as standard a 20 key keyboard and a 2 line liquid crystal display LCD with 16 characters per line This display has highly reliable LED diode back lighting the screen brightness can be adjusted on the rear of the front board By means of this interface the user can change the settings display measurements carry out operations and access information stored in the unit The functions of this local interface and how to use it are described in the section KEYBOARD AND DISPLAY 106168 Breaker Failure Protection 15 2 6 REMOTE COMMUNICATIONS The relay has 2 serial gates and three connectors Gate 1 can be reached from the front of t
34. atus Communication Settings User or Default Protection Link Status IRIG B Link Actual Date and Time DBF Breaker Failure Protection GEK 106168E 8 KEYBOARD AND DISPLAY 8 4 CONTROL GROUP ACT KEY Being on the steady state screen of LCD at the front of the relay by Pressing ACT key the following will prompt SET DATE TIME Pressing ENT key the system allows to set the date and time by entering the year month day hour minutes and seconds in this sequence After each setting the ENT key must be pressed If instead of pressing the ENT key when the SET DATE TIME screen appears the arrow key up or down is pressed the next screen will be shown COMMUNICATION TRIGGER By pressing ENT key the following sequence will be displayed e CONFIRM Yes No 2 e OPERATION EXECUTED OPERATION CANCELED GEK 106168E DBF Breaker Failure Protection 47 8 5 SINGLE KEY MENU Being on the steady state screen of LCD at the front of the relay by Pressing ENT key the single key menu will be accessed Then the information displayed while step by step pressing ENT key is Phase A Current Neutral Current 4 Phase A Counter Number of phase A Openings Type of BF Logic Pickup Status Protection Status Circuit Breaker ZA Pole Status Circuit Breaker Pole Status Circuit Breaker C Pole Status Latching Relay 1 Status Latching Relay 2 Status Date and Time 48 DBF Breaker Failure Protection 106168
35. ay has not an expansion board energize digital inputs CC1 PHASE A BF INITIATE and CC2 PHASE B BF INITIATE simultaneously Check that after T2 time delay 15 the following contacts are closed A12 B12 C4 D4 C5 D5 Check that after 2nd Stage Timer delay 2s the following contacts are closed C1 D1 C6 D6 C7 D7 Change setpoint TABLE 1 50BF SETTINGS N OUTPUT STAGES to 1 12 Repeat steps 8 to 9 Check that after T2 time delay 1s all the contacts are closed 12 12 C1 D1 C4 D4 C6 D6 C5 D5 C7 D7 Change setpoint TABLE 1 50BF SETTINGS BF LOGIC 3P 2P to 2 PHASE Apply 3A to terminals B1 B2 phase B and terminals A3 A4 phase C Energize digital inputs CC2 PHASE B BF INITIATE and CC3 PHASE BF INITIATE Check that after T2 time delay 15 the following contacts are closed A12 B12 C1 D1 C4 D4 C6 D6 C5 D5 C7 D7 Repeat steps 15 to 17 choosing any other pair of phases to apply ac current and any other pair of BF initiation inputs DBF Breaker Failure Protection 106168 6 ACCEPTANCE TESTS 6 9 3 INTERNAL ARC TEST Change setpoint GENERAL FUNCTION PERMIT 50BF FUNCTION to NO PER Change setpoint TABLE 1 INTERNAL ARC SETTINGS INT ARC TIMER to 2s Energize digital input CC4 52 b A Apply 2A to terminals A1 A2 phase A Check that after INT ARC TIMER time delay contact C2 D2 is closed Repeat steps 3 4 and 5 for phases B terminals B1 B2 with digital input CC5 52 b B and C termin
36. cal communication refers to communication via the keyboard display local display showing any information except for the initial DBF GENERAL ELECTRIC screen or via communications gate 1 PORT 1 PORT2 connectors and remote communication refers to connection via gate 2 PORT 3 rear connector Local and remote communications can exist at the same time although there is only one possibility for changing settings and carrying out operations since this can only be done with the communication which has priority local communication while the other is limited only to accessing information When the local communication is interrupted either by the disconnection of PORT 1 connector or because the HMI is on the initial screen a situation which can be caused intentionally or automatically if no key has been pressed for 15 minutes the remote communication recovers the ability to modify settings and carry out operations 16 DBF Breaker Failure Protection 106168 3 SETTINGS 3 SETTINGS This section describes the settings of the DBF relay and the procedure to modify them Table 3 shows the list of DBF settings their range and resolution and the factory default settings To view or to modify settings using the GE_LOCAL program connected to PORT 1 PORT 2 or PORT 3 the user has to perform the following steps Check that the available connection cable is in accordance with the diagram in Figure 7 Check correspondence between DB 9 con
37. ct used is determined by the status of the digital inputs 12 DBF Breaker Failure Protection 106168 2 OPERATION LOGIC 2 4 2 TIME SYNCHRONIZATION The DBF system includes an input for time synchronization This input requires the connection of a device to supply a demodulated IRIG B output In this way coordinated universal time is measured to a high degree of accuracy and makes possible to tag events generated by the unit with a resolution of one millisecond The use of this input makes it possible to correlate data obtained from different units thanks to synchronization with GPS satellites In this way it is possible to obtain very useful information for analysis cross referencing the information provided by different units for a given incident Alternatively it is possible to synchronize units by means of communications using the GE LOCAL communications software or manually by means of the HMI If the IRIG B input is used it has priority over time setting by communications since the time read by IRIG B is much more accurate 2 4 3 CONFIGURABLE INPUTS AND OUTPUTS 2 4 3 1 Digital Inputs The DBF system has 6 digital inputs two groups of 3 inputs with one common in each group The inputs can be configured by the user by means of the GE INTRO configuration program Using the optional expansion board it is possible to increase the number of inputs up to a total of 14 2 groups of 3 inputs with one common in each group
38. detector ph B 3 3 Hi Set C Pickup 34 SOBF Pole A Initiate 3 5 5 Pole B Initiate 3 6 SOBF Pole C Initiate 3 7 Lo Set A Pickup Output of Lo Set current detector ph A 3 8 Lo Set B Pickup Output of Lo Set current detector ph B 3 9 Lo Set C Pickup Output of Lo Set current detector ph C 3 10 3 Phase Initiate 3 11 Neutral Initiate 3 12 nternal Arc A Pickup Output of AND 16 in figure 1 3 13 3 14 gt rc 40 signal is activated Output of OR 7 in figure 1 Trip 1 Any unit except Internal Arc has tripped Output of OR 6 in figure 1 Same as Trip 1 when 1 step is selected Trip 2 2 stage when 2 steps are selected Output of AND 14 15 in figure 1 Trip from Internal Arc unit Output of Internal Arc 220 Timer 4 in figure 1 4 1 4 4 3 4 4 5 4 6 Group 240 peat 212 2143 244 2 15 30 81 32 33 384 85 386 37 38 39 310 341 342 3 13 314 2 4 4 11 4 12 4 13 4 14 4 15 5 0 hase B Trip 5 2 hase C Trip utput of Timer 1 phase C in figure 1 5 3 Output of Timer 2 in figure 1 T S 410 A J bV amp utput of Timer 1 phase B in figure 1 utput of Timer 3 in figure 1 utput of AND 14 15 in figure 1 5 4 hree Pole Trip without Current econd Stage Trip 6 DBF Breaker Failure Protection 106168
39. e Specific Settings The Generic settings are grouped as follows GENERAL SETTINGS BREAKER SETTINGS ACTIVE TABLE SETTINGS OSCILLOGRAPHY MASK FUNCTION PERMISSION For the specific settings the DBF allows to have up to 3 independent setting tables These specific settings are grouped as follows 50BF SETTINGS INTERNAL ARC SETTINGS Only one setting table is active at a given time and this is the table used by the system to run the different functions included in it There is an ACTIVE TABLE setting that determines the settings table that is active at a given moment The active settings table can be changed by means of up to 2 digital inputs referred to as ACTIVE TABLE SELECT 0 and ACTIVE TABLE SELECT 1 which allow up to 4 combinations from 0 to 3 To do this it is necessary to configure using GE INTRO software two inputs to have these meanings For applications which require less tables up to 2 it is possible to use only one input The selected combination is obtained from the binary coding of the 2 inputs mentioned see following table The 0 0 means selecting the table indicated in the ACTIVE TABLE setting and numbers 0 1 to 1 1 select tables 1 to 3 respectively Table Selection Table Selection Active Table INPUT 1 INPUT 0 0 y Selected by setting NOTE if the inputs are programmed and used energizing them this selection has priority over the ACTIVE TABLE setting and the table which is in fa
40. e breaker failure operation 11 Repeat steps 7 8 9 and 10 using phase C current A3 A4 terminals and CC3 PHASE C BF INITIATE C10 D10 terminals to start the breaker failure operation 12 Change setpoint TABLE 1 50BF SETTINGS N OUTPUT STAGES to 1 13 Repeat steps 7 to 12 to check that in this case contacts C1 D1 C6 D6 C7 D7 E4 F4 E5 F5 and E6 F6 close at the same time than contacts A12 B12 4 04 C5 D5 and E1 F1 E2 F2 E3 F3 if an expansion board is available gu bs 106168 DBF Breaker Failure Protection 33 6 ACCEPTANCE TESTS 6 9 2 50BF 3P UNIT TEST The DBF relay outputs are factory set with the default settings shown in the external connections drawing Figure 2 Dy OV m 13 14 15 16 34 Change setpoint GENERAL FUNCTION PERMIT 50BF 1P FUNCTION to NO PER Change setpoint GENERAL FUNCTION PERMIT 50BF 3P FUNCTION to PER Change setpoint GENERAL FUNCTION PERMIT 3P No INT FUNCT to NO PER Change setpoint TABLE 1 50BF SETTINGS N OUTPUT STAGES to 2 Change setpoint TABLE 1 50BF SETTINGS BF Logic 3P 2P to 3 PHASE The precision timer will be started at the same time than the corresponding contact converter digital input is energized The timer stop input will be wired to any DBF contact under test i e contact C4 D4 Apply to terminals A1 A2 phase A B1 B2 phase A3 A4 phase C Energize digital input CC7 3 POLE BF INITIATE if the rel
41. e protection control and measurement unit that has different algorithms to allow its use on a wide range of applications in power systems The functions and information management of the unit can be performed remotely computer connected to the serial port RS232 fiber optic or modem or locally using the man machine interface HMI which includes a 20 keys keypad and a two line liquid crystal display LCD on the front of the relay The system provides the following functions a Protection e Low current level breaker failure protection following a single or three phases initiation with up to two time delayed steps e High current level breaker failure protection following a two three selectable by setting phases initiation e No current breaker failure protection following a two three selectable by setting phases initiation Breaker internal arc detection b Monitoring e Current measurements for each phase and ground e Breaker status e 16 fully configurable LED indicators e One fixed relay status LED e Breaker health monitoring 12 t e Built in self check functions c Analysis e Event recorder Oscillography d Control e 3 settings tables e Time synchronization using the communications program the IRIG B input or the HMI keypad display e Configurable inputs and outputs e User can build logic schemes using AND OR and NOT gates and the internal digital signals of the rela
42. ecessary to use a computer and the communications software GE LOCAL Figure 7 shows the series cable and connection accessories necessary to establish the connection between the PC and the relay Figure 8 shows the cable and connectors necessary for remote connection by MODEM through PORT3 The PC communication parameters necessary to match the relay default setting parameters are Relay number 1 Remote port speed 19200 Local port speed 19200 Remote stop bit 1 Local stop bit 1 By using GE Local communications software establish the connection and check that the relay communicates through the three communication ports Repeat this test with different baud rates and different power supply voltages 106168 Breaker Failure Protection 31 6 ACCEPTANCE TESTS 6 8 INPUTS 6 8 1 DIGITAL INPUTS Log into the relay using the GE_LOCAL software and press INPUTS OUTPUTS button on the first general screen Check that applying dc rated voltage between terminals C9 D9 C10 C11 D11 C12 and and and and and and 010 010 010 012 012 012 CC1 CC2 CC3 4 5 CC6 their corresponding status windows turn red while the applied voltage remains present If the relay has the optional expansion board check the same for the following contact converter inputs and and and and and and and and 6 8 2 IRIG B SYNCHRONIZING INPUT Connect the output of an IRIG B unit with decod
43. ed output to the IRIG B input at the rear of the DBF Special care must be taken when making the connection because the input is polarized Check that the time measured by the two units is the same 32 DBF Breaker Failure Protection GEK 106168E 6 9 FUNCTIONS 6 9 1 50BF 1P UNIT TEST Change setpoint GENERAL FUNCTION PERMIT 50BF 1P FUNCTION to PER Change setpoint GENERAL FUNCTION PERMIT 50BF FUNCTION to NO PER Change setpoint TABLE 1 FUNCTION PERMIT 3P No INT FUNCT to NO PER Change setpoint SETTINGS N OUTPUT STAGES to 2 The precision timer will be started at the same time than the corresponding contact converter digital input is energized The timer stop input will be wired to any DBF contact under test i e contact C4 D4 Apply 2A to terminals A1 A2 phase A 7 Energize digital input CC1 PHASE A BF INITIATE terminal C9 D10 8 Check that after T1 time delay 1s the following contacts are closed A12 B12 C4 D4 C5 D5 In case the relay under test includes an expansion board check also the operation of the following contacts 1 1 2 2 9 Check that after 2nd Stage Timer delay 2s the following contacts are closed C1 D1 C6 D6 C7 D7 and if the relay is equipped with an expansion board also the following contacts must be closed E4 F4 E5 F5 E6 F6 10 Repeat steps 7 8 9 and 10 using phase B current B1 B2 terminals and CC2 PHASE B BF INITIATE D9 D10 terminals to start th
44. f the passwords access communication speeds etc This menu is accessed by keying in the code 7169 In order to access this mode the relay should be on the main screen Single key menu By pressing the ENT key the DBF can be operated in a simplified mode It is not necessary to remove the plastic cover on the front of the relay to access this mode In steady state the DBF shows the following message on the DISPLAY DBF GENERAL ELECTRIC At this point the five groups mentioned above can be selected In order to select a different group the user must return to this screen and press the key that corresponds to that group Once inside a group it is not possible to select a different one Movement to any other group is carried out using the following keys ENT CLR and the up down left right arrows Their function is as follows ENT Accepts the option that is shown on the screen It is equivalent to go down one level in the menu tree CLR Quits the option that is shown on the screen It is equivalent to go up one level in the menu tree UP DOWN ARROWS Change options The equivalent of a horizontal movement within a menu When the required option appears on the screen it can be selected with the ENT key LEFT RIGHT ARROWS Show the different possibilities of a given setting It is not used for all settings When the required option appears on the screen it can be selected with the ENT key 106168 Breaker Failure Pro
45. failure initiate signal issued by the main feeder protection These breaker failure initiation signals can be single phase or three phase type at OR1 OR2 and OR3 There are four digital signals available Initiate A Initiate B 50BF Initiate and BF Initiate assignable to any digital input contact converter The factory digital input configuration is the following as shown in figure 1 Digital Signal Input Terminals Initiate A Input 1 c9 010 SOBF Initiate B Input 2 09 010 Initiate C Input 3 C10 010 BF Initiate Input 7 E7 E8 The AND1 AND2 and gates thus fully armed may perform depending on settings one or two time delayed tripping steps Use 50BF setting permitted Not permitted and number of output stages of Output Stages setting to enable this function and to set the number of steps Timers T1 and T2nd control the timing of the first and second step respectively 1 Phase Timer T1 and 2nd Stage Timer settings If the tripping signal is three pole type digital input E7 E8 for the default factory configuration the signal will be placed at the same time in OR1 OR2 and ORG and then to AND1 AND2 and AND3 High Level Overcurrent Breaker Failure Unit 50 This function operates if high Level overcurrent is detected on 2 phases or 3 phases if setting BF Logic 3P 2P is set to and if 2 breaker failure initiatio
46. functions are integrated in two separate programs it is unlikely that faults will occur due to problems of wear and tear short circuits or aging which are typical in other electromechanical protection systems whether analogue or hybrid Moreover a failure in the communications processor does not affect the protection functions which are implemented by a dedicated processor GEK 106168E DBF Breaker Failure Protection 39 7 INSTALLATION AND MAINTENANCE 40 DBF Breaker Failure Protection GEK 106168E 8 KEYBOARD AND DISPLAY 8 KEYBOARD AND DISPLAY The DBF has a 20 key keyboard and a liquid crystal DISPLAY with 32 characters divided into two rows of 16 each The following diagram shows the appearance of the DBF Keyboard A200 The keyboard program uses menus to access the different relay functions These functions are divided into five large groups each of which is accessed using a different key These groups are the following Information Provides data about the state of the relay alarms breaker status record of currents events record etc This menu is accessed using the INF key Control Permits reset of latching relays oscillography triggering and synchronizing This menu is accessed by pressing the ACT key Settings Permits viewing and changing all the relay settings This menu is accessed by pressing the SET key Configuration menu Permits access to the system configuration and the modification o
47. he relay in connector 1 PORT 1 connector or from the rear PORT 2 connector The second gate can be reached from connector 3 PORT 3 connector which is located on the rear There are different models each with a different physical connection for the PORT 3 connector RS 232 RS 485 or fiber optic In the RS232 models the three connectors are RS232 In the RS232 and fiber optic models the PORT1 and PORT2 connectors RS232 while the PORT3 connector is replaced by a fiber optic connector The PORT 1 connector has priority over the PORT 2 connector and is selected when the DCD Data Carrier Detect signal is activated Figure 8 shows how to make the connections to a personal computer Gate 1 PORT 1 and PORT 2 connectors and 2 PORT 3 connector are independent and the unit can serve them simultaneously The communications protocol is the same used for the rest of the GE digital protection systems and requires the use of the GE LOCAL software PORT 3 protocol can be chosen between M LINK and ModBus RTU The protocol is highly reliable and allows communication with different protection systems It guarantees very efficient data transfer especially for the oscillography and other large files along with error detection and automatic communication recovery The status of the local remote communication is indicated on the front of the unit by LED indicator 16 the last LED in the right hand column according to the default configuration Lo
48. irectly connected allowed not allowed REM OPERATIONS Operations being performed by remote communications e g modem allowed not allowed UNIT NUMBER Each DBF is identified by a unit number which it uses to identify the messages which sent to it on the remote communications line This number can be between 1 and 255 PASSWORD To prevent unauthorized persons from communicating with the relay a communications program and changing the settings or performing operations the relay has a password This password can only be seen on the relay display and takes the form of a number between 0 and 99999 t TIME OUT Set to 0 if the relay is not working in DDS integrated system Set to the maximum time between two synch signals coming from the PC host when the relay is working in a DDS integrated system If a new synch signal is not received in this time the relay will report an error 106168 Breaker Failure Protection 49 8 KEYBOARD AND DISPLAY 50 DBF Breaker Failure Protection 106168 FIGURES GEK 106168E DBF Breaker Failure Protection 51
49. l number see list of models in Chapter 4 and the technical characteristics of the unit are situated on the front panel of the relay The 16 indicator LEDs can be identified using labels which can be placed beside them inside available plastic holders A frontal bus is responsible for the connections between the lower and upper trays described above Both trays can be pulled out To do so you first have to release the front panel which is fixed to the case with two screws and pull it out removing the flat cable which connects it to the CPU It is then possible to remove the frontal bus The blocks of terminals situated on the rear of the case are identified with the letters A B C and D and optionally E and F as shown in figure 9 In addition each terminal is identified with a number 106168 Breaker Failure Protection 25 26 5 HARDWARE DESCRIPTION The communications connectors are situated on left hand side of the front and on the right hand side of the rear of the case The front port is PORT 1 and the rear ports are PORT 2 and PORTS The IRIG B connection is made using a block of two additional terminals DBF Breaker Failure Protection 106168 5 2 OPERATING THEORY The DBF unit measures current signals performs complex calculations using internal data stores relevant incidents pick up tripping relays and generates information that can be used to determine the state of the associated electrical system
50. m the rest of the relay s circuits The power supply provides 12 VDC to the analog circuitry and the output relays and 5 VDC for the digital circuits 5 2 4 KEYBOARD AND DISPLAY The DBF display at the front of the relay is liquid crystal type and consists of two rows of 16 characters each The display has background light with variable lightness adjustable by a potentiometer located on the rear of the front cover plate 28 DBF Breaker Failure Protection 106168 6 ACCEPTANCE TESTS 6 ACCEPTANCE TESTS 6 1 CONNECTIONS AND NECESSARY EQUIPMENT Necessary equipment One current source One DC voltage source Precision timer for testing timed events One AC DC voltmeter ammeter e e e e Connect the relay as indicated in the external connections diagram Figure 2 For safety reasons the external protection earth should be securely grounded Apply dc rated voltage to terminals A10 B10 6 2 VISUAL INSPECTION Check that the relay has not suffered any kind of damage due to transport and handling Check that all the screws are tight and the terminal blocks have not been damaged in any way 6 3 PANEL INSULATION TESTS If any insulation test would be performed on the panel where the relay is installed the ground terminals A9 B9 must remain ungrounded Do the following groups in the terminals of the relay Group 1 A10 B10 Group 2 A1 to A4 B1 to B4 Group 3 C9 C10 D9 D10 C11 C12 D11 and D12 Group 4
51. n inputs are energized or just the 3P BF Initiate input if Severe Fault 3P setting is set to permitted The starting of this function is similar to the 1P but in this case the current level setting range is higher PH Hi Set Pickup setting and the output is controlled by the energization of two single pole initiation signals This function can also operate energizing the 3P BF Initiate signal if Severe Fault 3P setting is set to permitted Other difference with respect to the 50BF 1P function is that the current in all the three phases must exceed the setpoint or at least one pair of phases This is selected with BF Logic 3P 2P setting In the first case BF Logic SP 2P set to 3P the signal should progress through AND11 and AND12 If BF Logic SP 2P is set to 2P then the signal will go through AND8 9 or AND10 and then AND13 The outputs of AND12 or AND13 are sent 106168 DBF Breaker Failure Protection 3 2 OPERATION LOGIC 5 to the bottom input of AND4 Any pair of single BF initiation signals placed at AND5 AND6 AND7 will activate the top input of AND4 This input to AND4 can also be ON if there is a 3P BF Initiation and Severe Fault 3P setting is set to permitted Ground Overcurrent Breaker Failure Unit The breaker failure action based in this ground overcurrent function basically performs an additional breaker failure function through AND19 when the BF Initiate or 2 Single P
52. nector in the cable with available connector at PC port could be DB 9 or DB 25 e Connect the cable between the relay or modem and the serial port of your computer Run the GE LOCAL software For more details on the installation and use of the GE LOCAL software see instruction book GEK 105568 e sure that the communication parameters in GE LOCAL match with those set on the DBF Specifically the parameters on the configuration of the local HMI are COMMUNICATION SPEED On the relay depending on whether communication is through PORT 1 or PORT 2 means LOCAL or PORT 3 means NET STOP Stop bit corresponding to each one of the communication ways LOCAL NET To modify or view the DBF communication parameters refer to Chapter 8 Section 8 1 Menu Tree IMPORTANT It should be noted that in order to simplify the setting of the unit and for safety reasons all settings related with the configuration of the unit configurable inputs and outputs internal status events and target LED s have been removed from the HMI facilities and also from the communications software GE LOCAL To perform these configurations the GE INTRO software described in instruction book GEK 105569 must be used TABLE 3 Settings Table range S In service 1 Neutral CT Ratio 1 4000 0 01s klt Maximum Limit 1 Active table setting group Active setting table GEK 106168E DBF Bre
53. nterference Electromagnetic fields radiated with amplitude modulation Electromagnetic fields radiated with amplitude modulation Common mode Electromagnetic fields radiated with frequency modulation Fast transients Magnetic fields at industrial frequency RF emission GEK 106168E Standard IEC 60255 5 50 60 Hz 1 min IEC 60255 5 1 60255 22 1 IEC 60255 22 2 EN 61000 4 2 IEC 60255 22 3 ENV 50140 ENV 50141 ENV 50204 IEC 60255 22 4 EN 61000 4 4 EN 61000 4 8 EN 55011 DBF Breaker Failure Protection Class 600V 2kV 30 Av m B 23 4 TECHNICAL CHARACTERISTICS 24 DBF Breaker Failure Protection 106168 5 HARDWARE DESCRIPTION 5 HARDWARE DESCRIPTION CAUTION The DBF contains electronic components that can be damaged by electrostatic discharge if currents flow through some terminals of the internal components The main source of electrostatic discharge currents is the human body especially in conditions of low humidity carpeted floors and isolated footwear Under these conditions it is important to have special care when removing and handling the modules or some of their internal components Personnel handling the relay should check that their body is free from electrostatic charge either by touching a surface at ground potential or by using an electrostatic wristband connected to earth 5 1 PHYSICAL DESCRIPTION 5 1 1 CASE The DBF case is made of stainless steel and
54. oard energize CC2 PHASE B BF INITIATE 10 Repeat step 8 applying current on A3 A4 phase C If the relay has not an expansion board energize CC3 PHASE C BF INITIATE 6 10 2 TIMING MEASUREMENT Connect the stop input of the precision timer to the A12 B12 output trip 1 Apply the operating current level of the previous test to terminals A1 A2 phase A Simultaneously energize the digital input 3POLE BF INITIATE and the starting input of the precision timer After 1 PHASE TIMER T1 0 0505 the relay will trip Verify that the actual operating time is equal to 1 PHASE TIMER T1 accuracy 596 or 30 ms whichever is greater c RON 106168 Breaker Failure Protection 37 6 ACCEPTANCE TESTS 38 DBF Breaker Failure Protection GEK 106168E 7 INSTALLATION AND MAINTENANCE 7 INSTALLATION AND MAINTENANCE 7 1 INSTALLATION The relay should be installed in a clean dry and dust free place with no vibrations The DBF system is supplied in a 19 rack case 2 units high Figure 5 shows the dimension diagram The relay should be mounted on a vertical surface Figure 6 shows a diagram for panel drilling Given that the design of the DBF unit is based on high performance digital technology it is not necessary to calibrate the relay However if the tests show that it is necessary to readjust the relay it is recommended to return the unit to the factory to check it 7 2 CONNECTION TO GROUND AND DISTURBANCES SUP
55. ole BF Initiate if Low Load 2P setting is set to permitted is present at OR10 and a ground current higher than Neutral Pickup setting is detected Breaker Failure without current or very low current DBF includes internal logic to cover also no current or very low fault current BF applications This function will issue an output if the 3P BF Initiate input is energized or 2 Single Pole BF Initiate if Low Load 2P setting is set to permitted and at least one pole of the circuit breaker is still closed Breaker Arc Detection Device This function may close one output of the relay when it detects that the circuit breaker is open and some amount of current is present in any phase There are two settings available for this function Internal Arc Pickup to set the current threshold and Internal Arc Timer to coordinate the operation time of the unit with the time it takes for the breaker and auxiliary elements to open If the circuit breaker is open then the 52 b contacts will energize the digital inputs corresponding to the circuit breaker status terminals C11 D12 D11 D12 and C12 D12 for the factory default configuration and then the upper input of AND16 AND17 and AND18 The other input will be energized if the DBF detects a current higher than Internal Arc Pickup setting The outputs of these AND gates are sent to OR8 and then to timer Internal Arc Timer setting to complete the arc detection function this will
56. s disconnected A high resolution real time clock is used to ensure that the date and time of all incidents can be time tagged with a resolution of one millisecond This clock can be synchronized externally using an IRIG B demodulated signal The input and output functions are divided between the two microprocessors The serial ports the keyboard and the display are controlled by the communications microprocessor External communications are processed by a serial communications controller circuit which contains a universal asynchronous transceiver DUART The digital inputs and outputs are processed by the protection microprocessor The DBF contains 6 independent circuits to process digital inputs These circuits check the presence or absence of input voltage and are designed to isolate them electrically from the microprocessor thus increasing the reliability of the system On the front of the relay there is a set of 17 Target LED s one of which is fixed and indicates the operating state of the unit The rest are user configurable using GE INTRO software The button situated on the front is designed to check the state of the Target LED s and to reset them by keeping it pressed during 3 seconds 106168 Breaker Failure Protection 27 5 HARDWARE DESCRIPTION 5 2 3 POWER SUPPLY The DBF power supply can be 48 125 VDC or 110 250 VDC rated The operating margin of the power supply is 2095 and is galvanically isolated fro
57. tection 41 8 KEYBOARD AND DISPLAY 8 1 MENU TREE The DBF has different menus divided into levels The Level 0 is the steady state screen The Level 1 of the different menus is accessed by pressing the corresponding group key SET INF etc The scrolling within a given level is done by using the UP and DOWN arrows It is possible to go down to levels 2 and 3 by pressing the ENT key Press CLR to go up a level within the menu tree The Level 1 for each of the five groups is shown in the following table Group VIEW SETTINGS View settings CHANGE SETTINGS Change settings CHANGE COUNTER Change counters STATUS Shows the status of the relay SET IL IN ACT SET DATE TIME Change date and time TRIGGERING Triggers the oscillography la current in primary Amps In current in primary Amps 1 A COUNTER Accumulated sec for phase A OPENINGS Accumulated number opens 3 2 Phase Logic Shows logic for 50BF High Set 50BF Pickup Shows status of 50BF Relay ON OFF Relay ON OF condition 52A Status Breaker Pole A open closed 52B Status Breaker Pole B open closed 52C Status Breaker Pole C open closed LATCHING RELAY 1 Status Latching Relay 1 open closed LATCHING RELAY 2 Status Latching Relay 2 open closed DATE amp TIME Shows date and time O P PORT3 remote comm Speed NETWORK STOP BITS PORT3 remote Stop bits LOCAL SPEED PORT1 amp 2 local comm Speed LOCAL STOP BITS 1 amp 2 local Stop bits LOCAL SETTINGS
58. tion Date and time Name of the signal that triggered the oscillography Active settings table when recording Digital information Status of internal digital signals Instantaneous rms values of currents la lc and ly A configurable mask is available for selecting which functions or internal signals are able to trigger the oscillography It can either be triggered by a configurable digital input by a command received from the communication program GE_LOCAL or directly from the HMI 10 DBF Breaker Failure Protection GEK 106168E 2 OPERATION LOGIC The user can select from the following list which signals may trigger the oscillography Oscillography HI SET B PICKUP HI SET C PICKUP 50BF C INIT The oscillography records are retrieved from the relay to the computer in COMTRADE international standard format using the GE LOCAL communications program To draw the waveforms digital flags phasors and post fault analysis in general it is suggested to use the GE OSC oscillography program or any other that accepts COMTRADE international format IEEE C37 111 1991 t is also possible to import the waveforms with mathematical or spreadsheet programs for example EXCEL 106168 Breaker Failure Protection 11 2 4 CONTROL 2 4 1 TABLES OF SETTINGS The DBF system has two types of settings stored in non volatile memory information is kept even when there is no auxiliary voltage e Generic Settings
59. ts 6 5 INDICATORS Check that pressing the TARGET RESET button with relay fed with rated dc power supply all target LEDs light up 6 6 POWER SUPPLY The relay operates with a dc power supply within 20 of the rated value Check that the READY target LED in the front of the relay lights up showing green color 1 Apply dc rated voltage to terminals A10 B10 Change setpoint FUNCTION 1P FUNCTION to PERM Apply 2A to terminals A1 A2 Energize digital input CC1 PHASE A BF INITIATE C9 D10 Wait 1second Check that the READY target LED in the front of the relay lights up showing green color Check the dc burden see table below 30 DBF Breaker Failure Protection GEK 106168E NOOR ODN 6 ACCEPTANCE TESTS 8 Remove the current from terminals A1 A2 Remove voltage from digital input CC1 9 Repeat these steps with minimum and maximum voltages depending on the range of the relay Test voltages and typical burdens are listed below Model G 48 125 VDC DC Battery mA Voltage Vdc Without Expansion Board With expansion Board 38 340 440 125 250 320 150 225 300 Model H 110 250 VDC DC Battery mA Voltage Vdc Without Expansion Board With expansion Board 88 300 370 110 250 320 300 150 220 6 7 COMMUNICATIONS The object of this test is to check the communication ports of the relay PORT1 PORT2 and To do this itis n
60. utton is kept pressed during three seconds 2 3 ANALYSIS FUNCTIONS The DBF system includes an event recorder and an oscillography waveform recorder with a resolution of 1 ms for the first one and 1 sample for the second one 1 04 ms at 60 Hz and 1 25 ms at 50 Hz To avoid the loss of date time and oscillography records during any Vdc power failure the unit is equipped with a capacitor which allows the information to be kept for at least 24 hours after power loss 2 3 1 EVENT RECORDER The DBF system keeps a record of the last 144 events and stores for each one the following information date and time accurate to one millisecond the type of event current RMS values during the event and the state of the unit set of digital signals that describes the status of the relay at any given moment in time This event recorder is stored in a non volatile memory and can be maintained indefinitely even with no power supply The list of events that the relay stores are factory fixed and corresponds to standard relevant situations operations like Settings Change Program initiate Active Table 1 Opening 52 phase C Closing 52 phase C Digital Input 1 Activated etc 2 3 1 OSCILLOGRAPHY The DBF unit stores up to 4 oscillography records with a resolution of 16 samples per cycle Each record has a maximum capacity of 66 cycles The number of pre fault cycles can be selected from 2 to 10 cycles Each record includes the following informa
61. y GEK 106168E DBF Breaker Failure Protection 1 1 GENERAL DESCRIPTION AND APPLICATION e Communication Interfaces e Remote communications through three communication ports one on the front of the relay and two located on the rear e Human machine interface HMI consisting of 20 keys keypad and alphanumerical LCD 16 characters x 2 lines e Windows based GE INTRO configuration software for inputs outputs LEDs configuration and GE LOCAL communications software for relay monitoring settings change stored data retrieve etc Both are part of the GE NESIS software package General Electric Network Substation Integrated System 2 DBF Breaker Failure Protection 106168 2 OPERATION LOGIC 2 OPERATION LOGIC See figure 1 at the end of the Instruction Manual 2 1 PROTECTION FUNCTIONS 2 1 1 OVERCURRENT UNITS The DBF system incorporates the following overcurrent detectors Three Single Phase Low Level Overcurrent Detectors Used by the 50BF 1P function Three Single Phase High Level Overcurrent Detectors Used by the 50BF function One Ground Overcurrent Detector Used by the SP No I function Three Single Phase current detectors for the internal arc function Low Level Overcurrent Breaker Failure Unit 1P The breaker failure operation is started by detecting any single phase above a setpoint threshold PH Lo Set Pickup setting ANDed with a tripping signal breaker
62. y model with digital input voltage of 48 Vdc the model should be DBF1 11 04A GEK 106168E DBF Breaker Failure Protection 21 4 TECHNICAL CHARACTERISTICS 4 2 TECHNICAL CHARACTERISTICS MECHANICAL Metal 19 rack case 2 units high IP51 Protection as per IEC 529 Local HMI LCD 2 rows 16 characters and 20 key keyboard Rear connection for wiring 4 blocks 12 terminals each 6 blocks when optional expansion board Dimensions 437 x 164 x 88 mm Weight Net 6 kg Shipping 7 kg ELECTRICAL 22 Frequency Rated current DC Power Supply Operational range Digital Input Voltage Thermal Capacity Current circuits Permanent 35 duration 1 s duration Temperature ranges Operation Storage Humidity Trip contacts AC Continuous Capacity Rated Breaking Capacity Make Operating Time DC Breaking Capacity Resistive Resistive Inductive L R240 ms Burden Current circuits Consumption At DC rated voltage Digital inputs Accuracy Current Time Error index Repeatability Operating value Operating time DBF Breaker Failure Protection 50 or 60 Hz selectable by setting 1 or 5 A different models 48 125 Vdc or 110 250 Vdc different models 80 to 120 of rated values For standard models 48 125 110 250 VDC according to selected model For special models please refer to section 4 1 1 4 x In 50 x In 100 x In 20 C to 4 55 C 40 C to 70 C Up to 95
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