SlideShare a Scribd company logo

INTERFACING.ppt

Download as PPT, PDF
D
DundiKumarBevara

The document provides information about various components and circuits in a substation including: - Circuit breaker auxiliary switches, pressure switches, annunciation, and indication circuits. - Circuit breaker operating mechanisms, arc quenching methods, and interlocks. - Closing and tripping circuits for circuit breakers. - Types of relays including bistable, monostable, anti-pumping contactor, and pole discrepancy relays. - Inputs and outputs of relays, local/remote switches, and wiring types. - Potential transformers, current transformers, and their distribution including nameplate details. - AC and DC circuits and their purposes including protection, control

Design
1 of 46
Download to read offline
1
2
3
4
5
6
7
Most read
8
Most read
9
10
11
12
13
14
15
16
Most read
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
GOPALA KRISHNA
BASICS 1. NO & NC CONTACTS 2. CIRCUIT BREAKER AUX SWITCH 3. ISOLATOR AUX SWITCH 4. PRESSURE SWITCH & DENSITY MONITOR 5. ANNUNCIATION 6. INDICATION 7. SEMOPHORE 8. CB OPERATING MECHANISAMS 9. CB ARC QUENCHING METHODS 10. INTERLOCKS BETWEEN CB & ISO 11. INTERLOCKS FOR LOCAL CLOSE OF CB 12. INTERLOCKS FOR REMOTE CLOSE OF CB 13. INTERLOCKS FOR ISOLATOR 14. INTERLOCKS FOR EARTH SWITCH 15. CB CLOSING CIRCUIT 16. CB TRIPPING CIRCUIT 17. WHAT IS BISTABLE RELAYS-NORMAL SWITCH 18. WHAT IS MONOSTABLE RELAYS-BELL SWITCH 19. ANTIPUMPING CONTACTOR 20. WHAT IS TSR & PRE CLOSE & POST CLOSE 21. AC FAIL CONTACTOR 22. DC FAIL CONTACTOR 23. SYNCHROSCOPE SOCKET – REQUIREMENTS – CONDITIONS 24. CB POLE DISCREPANCY RELAY 25. BINARY INPUT & BINARY OUTPUT OF RELAY 26. TNC SWITCH 27. LOCAL REMOTE SWITCH 28. SPRING CHARGE LIMIT SWITCH 29. TYPES OF WIRING- INTRA, INTER & CABLE SCHEDULE 30. PT / CVT IN MB 31. PT DISTRIBUTION 32. BUS PT SELCTION LOGIC 33. BUSPT LINE CVT SELECTOR SWITCH 34. CT IN MB & CORE CLASS & TERMINATION & STAR FORMATION FOR BUS & CIRCUIT 35. STANDARDS FOLLOWING 36. CABLE SCHEDULE
C & R Panel Contains 1. AC Circuits 2. DC Circuits 3. CT Circuits 4. PT/CVT Circuits
PURPOSE OF AC CIRCUITS 1. DOOR LAMP 2. PANEL HEATER 3. PLUG SOCKET 4. AUX SUPPLY TO ANNUNCIATION FACIA 5. AUXILIARY SUPPLY TO TRANSDUCER CKT 6. DC FAIL CIRCUIT AC CIRCUITS are to be Extended to 1. Control Panel 2. Circuit Breaker Marshaling Box 3. Switch Yard Bay Marshalling Box 4. Current Transformer Marshalling Box 5. CVT / PT / EMVT Marshalling Box 6. ISOLATOR Operation (3-Ph) 7. Circuit Breaker Operating Mechanism Drive(3-Ph)
PURPOSE OF DC CIRCUITS 1. INDICATION CIRCUITS 2. ANNUNCIATION CIRCUITS 3. CB CLOSING COIL & TRIP COIL-1 CKT 4. CB TRIP COIL-2 CKT 5. TO SYNCHRONISATION CIRCUIT 6. TO MAIN-1(21M1/ 87T) PROTECTION 7. TO MAIN-2 or BU(21M2/ 67) PROTECTION 8. TO AC SUPERVISION 9. TO ISOLATOR CONTROL 10. TO ISOLATOR INTERLOCK
INDICATION CIRCUITS 1. CB 52 CLOSE & OPEN 2. CB 52 TC-1 HEALTHY 3. CB 52 TC-2 HEALTHY 4. CB 52 SPRING CHARGED 5. CB 52 CAPACITOR CHARGED 6. CB 52 SEMAPHORE INDICATIOR 7. BUS ISOLATOR 29/89 CLOSE & OPEN 8. BUS ISO 29/89 SEMAPHORE INDICATOR 9. LINE ISOLATOR 29/89L CLOSE & OPEN 10.LINE ISO 29/89L SEMAPHORE INDICATOR
GROUP - A & GROUP - B TRIPPINGS For 400KV Stations there shall be two separate Battery systems available for Protection, Control & Tripping/Closing Operations. To obtain Redundancy and to be able to take Protection out for Maintenance, while Equipment is in service, the Relays are Electrically and Physically segregated in to two groups. Grouping is done to the extent possible in such a way that each group can independently carryout Protective functions with near equal redundancy. Inter connection of these two groups shall not be generally be attempted. DISTRIBUTION OF DC SUPPLY SHALL BE DONE BAY WISE TO FEED THE FOLLOWING 1. PROTECTION 2. CB CONTROL 3. ISOLATOR / EARTH SWITCH CONTROL 4. ANNUNCIATION / INDICATION LINE PROTECTION TRANSFORMER PROTECTION REACTOR PROTECTION GROUP-A MAIN-1 PROTECTION M1 BUILT IN FUNCTIONS TEED-1 PROTECTION OVER VOLTAGE STAGE-1 PROT DIRECT TRIP CHANNEL-1 RECEIVED GROUP-B MAIN-2 PROTCTION M2 BUILT IN FUNCTIONS TEED-2 PROTECTION OVER VOLTAGE STAGE-2 PROT LBB/BFR RELAY DIRECT TRIP CHANNEL-2 RECEIVED GROUP-A T/F DIFFERENTIAL RELAY T/F HV BACKUP RELAY T/F IMP / 21T RELAY T/F HV OVERFLUX RELAY OIL TEMP HIGH TRIP PRESURE RELIEF TRIP TERITIARY DELTA WNDG NDR PROT GROUP-B T/F REF / HIGH Z DIFF RELAY BUCHHOLZ TRIP T/F LV BACKUP RELAY T/F NEUTRAL CURRENT / 51 O/C RLY T/F LV OVERFLUX RELAY OVER LOAD PROT (ALARM ONLY) OLTC BUCHHOLZ TRIP WINDING TEMP HIGH TRIP LOW/ HIGH OIL LEVEL TRIP GROUP-A REACTOR DIFFERENTIAL RELAY REACTOR BACKUP / 21R RELAY OIL TEMP HIGH TRIP PRESURE RELIEF TRIP GROUP-B REACTOR REF RELAY BUCHHOLZ TRIP WINDING TEMP HIGH TRIP LOW/ HIGH OIL LEVEL TRIP FIRE PROTECTION TRIP
VOLTAGE SUPPLY SELECTION BUS-1 BUS-2 89A 89B 52 CB 3 CT 89L LINE PT/EMVT PT/EMVT WAVE TRAP CVT LA/SA IF 89A ISOLATOR CLOSED BUS-1 PT VOLTAGE WILL BE SELECTED IF 89B ISOLATOR CLOSED BUS-2 PT VOLTAGE WILL BE SELECTED IF VOLTAGE SELECTOR SWITCH IS KEPT IN BUS THEN BUS PT VOLTAGE IS EXTENDED TO RELAY IF VOLTAGE SELECTOR SWITCH IS KEPT IN LINE THEN LINE CVT VOLTAGE IS EXTENDED TO RELAY THE CIRCUIT DIAGRAM SHOWN IN NEXT PRESENTATION BUS-1 & BUS-2 PT IS COMING TO PT DISTRIBUTION BOX AND DISTRIBUTED FURTHER.
VOLTAGE SUPPLY SELECTION 89A BUS-1 ISOLATOR +VE -VE R Y B N BUS-1 PT SUPPLY 89B BUS-2 ISOLATOR +VE -VE R Y B N BUS-2 PT SUPPLY 89BX 89AX R Y B N LINE CVT SUPPLY BUS PT LINE CVT N MANUAL VOLTAGE SELECTOR SWITCH. 21 MAIN-1 OR 21 MAIN-2 PROT RELAY
CT NAME PLATE DETAILS CORE CLASS OF ACCURAC Y RATIO PRIMAR Y WINDIN G SECONDA RY WINDING KNEE POINT VOLTAGE MAGNETISIN G CURRENT CORE RESISTANC E 1 PS (PROTECT ION) 500/1 PI – P2 1S1 – 1S2 1000V 120mA 2.5 OHMS 1000/1 1S1 – 1S3 2000V 60mA 5.0 OHMS 2000/1 1S1 – 1S4 4000V 30mA 10.0 OHMS 2 PS (PROTECT ION) 500/1 PI – P2 2S1 – 2S2 1000V 120mA 2.5 OHMS 1000/1 2S1 – 2S3 2000V 60mA 5.0 OHMS 2000/1 2S1 – 2S4 4000V 30mA 10.0 OHMS 3 0.2 (METERIN G) 500/1 PI – P2 3S1 – 3S2 BURDEN = 40VA 1000/1 3S1 – 3S3 2000/1 3S1 – 3S4 4 PS (PROTECT ION) 500/1 PI – P2 4S1 – 4S2 1000V 120mA 2.5 OHMS 1000/1 4S1 – 4S3 2000V 60mA 5.0 OHMS 2000/1 4S1 – 4S4 4000V 30mA 10.0 OHMS 5 PS (PROTECT ION) 500/1 PI – P2 5S1 – 5S2 1000V 120mA 2.5 OHMS 1000/1 5S1 – 5S3 2000V 60mA 5.0 OHMS 2000/1 5S1 – 5S4 4000V 30mA 10.0 OHMS
CVT NAME PLATE DETAILS CORE CLASS OF ACCURACY PRIMARY WINDING SECONDAR Y WINDING PRIMARY VOLTAGE SECONDARY VOLTAGE VA BURDEN 1 3P (PROTECTIO N) P1 – E 1a1 – 1n 1a2 – 1n 220KV / √3 110V / √3 200 VA 2 3P (PROTECTIO N) P1 – E 2a1 – 2n 2a2 – 2n 220KV / √3 110V / √3 200 VA 3 0.2 (METERING) P1 – E 3a1 – 3n 3a2 – 3n 220KV / √3 110V / √3 100 VA CORE CLASS OF ACCURACY PRIMARY WINDING SECONDAR Y WINDING PRIMARY VOLTAGE SECONDARY VOLTAGE VA BURDEN 1 3P (PROTECTIO N) P1 – E 1a1 – 1n 1a2 – 1n 400KV / √3 110V / √3 200 VA 2 3P (PROTECTIO N) P1 – E 2a1 – 2n 2a2 – 2n 400KV / √3 110V / √3 200 VA 3 0.2 (METERING) P1 – E 3a1 – 3n 3a2 – 3n 400KV / √3 110V / √3 100 VA
PT / EMVT NAME PLATE DETAILS CORE CLASS OF ACCURACY PRIMARY WINDING SECONDAR Y WINDING PRIMARY VOLTAGE SECONDARY VOLTAGE VA BURDEN 1 0.2 (METERING) P1 – E 1a1 – 1n 1a2 – 1n 132KV / √3 110V / √3 100 VA 2 0.5 (PROTECTIO N) P1 – E 2a1 – 2n 2a2 – 2n 132KV / √3 110V / √3 100 VA 3 3P (PROTECTIO N) P1 – E 3a1 – 3n 3a2 – 3n 132KV / √3 110V / √3 100 VA CORE CLASS OF ACCURACY PRIMARY WINDING SECONDAR Y WINDING PRIMARY VOLTAGE SECONDARY VOLTAGE VA BURDEN 1 3P (PROTECTIO N) P1 – E 1a1 – 1n 1a2 – 1n 220KV / √3 110V / √3 200 VA 2 3P (PROTECTIO N) P1 – E 2a1 – 2n 2a2 – 2n 220KV / √3 110V / √3 200 VA 3 0.2 P1 – E 3a1 – 3n 3a2 – 3n 220KV / √3 110V / √3 100 VA
BUS PT AT YARD U U U U U U U U U U U U U U U U U U BUS-1 PT/EMVT PRIMARY VOLTAGE 220 KV / 1.732 SECONDARY VOLTAGE 110V/1.732 P1 U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U TO CONTROL ROOM PT DISTRIBUTION PANEL U U U U U U U U U U U U U U U U U U BUS-2 PT/EMVT PRIMARY VOLTAGE 220 KV / 1.732 SECONDARY VOLTAGE 110V/1.732 P1 U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U TO CONTROL ROOM PT DISTRIBUTION PANEL BUS-1 BUS-2 METERING CL: 0.2 MAIN-2 PROT CL:3P MAIN-1 PROT CL:3P OPEN DELTA CL: 0.5 METERING CL: 0.2 MAIN-2 PROT CL:3P MAIN-1 PROT CL:3P OPEN DELTA CL: 0.5 PTMB PTMB
BUS PT DISTRIBUTION PANEL (EXCEPT FOR 1-1/2CB / DBDCB / RING SYSTEM) X02 1 2 3 4 5 6 7 8 9 10 11 12 13 14 1 2 3 4 5 6 7 8 9 10 11 12 13 14 X12 X22 1 2 3 4 5 6 7 8 9 10 11 12 13 14 51 52 53 54 55 56 57 58 59 60 61 62 63 64 X02 BUS-1 PT DISTRIBUTION BUS-2 PT DISTRIBUTION TO INDIVIDUAL C&R PANEL EACH SET FOR EACH CIRCUIT
PT/CVT & CT MARSHLING BOX TB 1 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 TB 2 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 TB 3 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 TB 4 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 TB 5 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 TB 1 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 TB 2 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 TB 3 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 CT MARSHELLING BOX CVT/PT MARSHELLING BOX TB 6 1 2 3 4 5 6 7 8 9 10 TB 4 1 2 3 4 5 6 7 8 9 10
BAY MARSHLING BOX TB 1 1 50 TB 2 51 100 TB 3 101 150 TB 4 151 200 TB 5 201 250 BAY MARSHELLING BOX BACK VIEW TB DISTRIBUTION BAY MARSHELLING BOX FRONT VIEW AC DISTRIBUTION MAIN MCB 3-PH 100A MCB -1 3-PH 25A MCB -2 3-PH 25A MAIN - 3 3-PH 10A MCB - 4 3-PH 10A MCB - 5 3-PH 10A MAIN - 6 3-PH 10A MCB - 8 3-PH 10A MAIN - 9 3-PH 10A MCB - 10 3-PH 10A MCB - 11 3-PH 10A MAIN - 12 3-PH 10A MCB - 13 3-PH 10A MAIN - 1 1-PH 5A MCB - 2 1-PH 5A MCB - 3 1-PH 5A MAIN - 4 1-PH 5A MCB - 5 1-PH 5A
IMPORTANT GUIDELINES CT & VT Earthing  CT / VT secondary neutrals should be earthed at one point only.  VT secondary neutral earthing is done at equipment itself.  It is preferable to earth the CT secondary neutral in the control / protection cubicle in order to provide maximum security to the operating personnel. CT POLARITY  As a practice the P1 terminal of the CT shall be towards the bus and P2 away from the bus.  From the above for Main-1, Main-2 & Metering – Primary current flows from P1 to P2. Accordingly secondary current Flows S2 to S1. Star formation is all S2s.  For the BBM & BBC – Primary current flows from P2 to P1. Accordingly secondary current Flows S1 to S2. Star formation is all S1s. Please conclude here.
CABLE SCHEDULE CABLE SCHEDULE 1. NAME OF THE SUBSTATION: 2. NAME OF THE FEEDER/ TRANSFORMER: 3. CB DETAILS: 4. CT DETAILS 5. CVT / PT / EMVT DETAILS: 6. ISOLATOR DETAILS 7. C&R PANEL DETAILS: 8. POWER TRANSFORMER DETAILS : S.No FROM TO DESCRIPTION / PURPOSE CORE NO REFERENCE PANEL TB No FERRULE PANEL TB No FERRULE Cable ID Cable & Size
CABLE SCHEDULE 1 2 3 4 5 6 7 S.No FROM TO PANEL TB No FERRULE PANEL TB No FERRULE 1 R – PH CT CORE - 5 5S1 CTMB TB-5-1 R-5S1 2 5S2 TB-5-2 R-5S2 3 5S3 TB-5-3 R-5S3 4 5S4 TB-5-4 R-5S4 5 Y – PH CT CORE - 5 5S1 CTMB TB-5-6 Y-5S1 6 5S2 TB-5-7 Y-5S2 7 5S3 TB-5-8 Y-5S3 8 5S4 TB-5-9 Y-5S4 9 Y – PH CT CORE - 5 5S1 CTMB TB-5-11 B-5S1 10 5S2 TB-5-12 B-5S2 11 5S3 TB-5-13 B-5S3 12 5S4 TB-5-14 B-5S4
CABLE SCHEDULE 8 9 10 11 12 DESCRIPTION / PURPOSE CABLE & SIZE CORE No REFERENCE REMARKS R-PH CT TO CT MB OF CORE-5 4C X 2.5 1 DRG NO: PAGE NO 2 3 4 Y-PH CT TO CT MB OF CORE-5 4C X 2.5 1 DRG NO: PAGE NO 2 3 4 B-PH CT TO CT MB OF CORE-5 4C X 2.5 1 DRG NO: PAGE NO 2 3 4
CIRCUIT BREAKER S.No DESCRIPTION INCASE OF CGL BREAKER 1 LOCAL CLOSING INTERLOCK K5, K5A 2 LOCAL CLOSE (IN CB CUBICLE) - - 3 REMOTE CLOSE (FROM CONTROL PANEL HAND CLOSE) K1 4 LOCAL TRIP ( IN CB CUBICLE) - - 5 REMOTE TRIP COIL-1 (FROM CONTROL PANEL HAND TRIP) K21A, K21B, K21C 6 REMOTE TRIP COIL-2 (FROM CONTROL PANEL HAND TRIP) K41A, K41B, K41C 7 CB OPEN INDICATION A11, A12-B11,B12-C11,C12 8 CB CLOSE INDICATION A41, A42-B41,B42-C41,C42 9 DC SUPPLY J1, J2 & J11 & J12 10 PROTECTION CLOSE OR AUTO RE-CLOSE K3 11 PROTECTION TRIP COIL-1 & POST CLOSE SUPERVISION K23A, K23B, K23C 12 PROTECTION TRIP COIL-2 & POST CLOSE SUPERVISION K43A, K43B, K43C 13 PRE CLOSE SUPERVISION OF TRIP COIL-1 K31A, K31B, K31C 14 PRE CLOSE SUPERVISION OF TRIP COIL-2 K49A, K49B, K49C 15 CB CONTACT DICTRIBUTION. NOs – 8, NCs – 8 16 CB POLE DISTURBANCE RELAY. 17 CB CONTACT MULTIPLICATION RELAY. 18 CB TROUBLE ALARMS - 63 AR, GA, GL, AL, AG, AA, OA
CIRCUIT BREAKER CLOSING CIRCUIT 52CC 52b J4 63A 63G 63HO 63N SPL 52Y J3 T N C LCIL K1 K3 LOCAL REMOTE K3A K5 52Y 52Y 52Y SLS 52a 86A 86B 96BB T N C SSSS SERVICE BYPASS SSS REMOTE CLOSE 21M1 A/R 21M2 A/R A/R CLOSE CONTROL & RELAY PANEL A/R CLOSE REMOTE CLOSE INTERLOCK
CIRCUIT BREAKER TRIPPING CIRCUIT 52TC 52a J4 63A 63G 63HO 63N J3 T N C LOCAL REMOTE PRE CLOSE SUPERVISION PROTECTION TRIP + POST CLOSE SUPERVISION PB EMERGENCY TRIP T N C 52TC 52a J14 63A 63G 63HO 63N PRE CLOSE SUPERVISION PROTECTION TRIP + POST CLOSE SUPERVISION LOCAL REMOTE J13 C&R PANEL T N C PB EMERGENCY TRIP
NOMINCLATURES 52 a CB AUX CONTACT OPEN WHEN CB OPEN 52b CB AUX CONTACT CLOSE WHEN CB OPEN 52 CC CB CLSOING COIL 52T C-1 CB TRIP COIL-1 63 A AIR PRESSURE CONTACT 52 TC- 2 CB TRIP COIL-2 63 G SF6 GAS PRESSURE CONTACT 63 HO HYDRAULIC OIL PRESSURE CONTACT 63 N NITROGEN PRESSURE CONTACT 52Y ANTIPUMPING CONTACTOR SP LS SPRING CHARGE LIMIT SWITCH LCIL LOCAL CLOSING INTERLOCK K3 A REMOTE CLOSE TNC TRIP NEUTRAL CLOSE SWITCH 18 6 28 6 MONOSTABLE & SELF RESETING FAST ACTING HIGH SPEED TRIP RELAYS 86 A 86 B 96 BB BISTABLE & HAND RESETING HIGH SPEED TRIP RELAY / MASTER TRIP RELAYS A/ R AUTO RECLOSURE SSS S SYNCHROSCOPE SELECTOR SWITCH SS S SYNCHROSCOPE SOCKET PB PUSH BUTTON LR LOCAL REMOTE SWITCH Synchronization Requirements 1. Voltages must be match 2. Frequency must be match 3. Phase angle must be match 1. Line Voltage 2. Bus Voltage 3. DC Supply 4. Closing Permission
LOCAL CLOSING INTERLOCK TAKE AN EXAMPLE OF SINGLE BUS SYSTEM 52 CB BUS 89 / 29 89 / 29 E 89 / 29 L 89 / 29 LE 89 / 29 AE LOCAL CLOSING INTERLOCK DRAWING 89M/B 89 E 89L 89AE K1 K3 REQUIRED INTERLOCK FOR LOCAL CLOSING NORMALLY DURING MAINTANENCE 1. BUS ISOLATOR OPEN CONDITION 2. LINE ISOLATOR OPEN CONDITION 3. 89E EARTH SWITCH CLOSED 4. 89AE EARTH SWITCH CLOSED
POLE DISTURBANCE RELAY THIS RELAY COMES IN TO PICTURE THE CIRCUIT BREAKER 3POLES ARE INTER CONNECTED THROUGH ELECTRICALLY NOT MECHANICALLY. WHEN THREE POLES ARE SIMULTANEOUSLY NOT OPEN OR CLOSE THEN THE RELAY ACTS AND TRIPS THE CIRCUIT BREAKER AFTER SOME TIME DELAY. EXAMPLE: 220KV CB, 400KV CB, 765KV CB AND ABOVE VOLTAGE LEVEL R Y B 52a R Y B 52b +VE TIME DELAY RELAY TO SER TO ANNUN TO CB TRIP -VE 52 TC-1-R 52 TC-1-Y 52 TC-1-B 52 TC-2-R 52 TC-2-Y 52 TC-2-B -VE 52 CIRCUIT BREAKER
TRIP CIRCUIT HEALTHY TO TC-1 HEALTHY INDICATION TO TC-1 FAULTY ANNUNCIATION +VE TO CB PROTECTION TRIP + POST CLOSE SUPERVISION PRE CLOSE SUPERVISION CONTROL & RELAY PANEL CIRCUIT BREAKER CENTRAL MB 52 TC-1 -VE CB HEALTHYNESS TO TC-2 HEALTHY INDICATION TO TC-2 FAULTY ANNUNCIATION +VE TO CB PROTECTION TRIP + POST CLOSE SUPERVISION PRE CLOSE SUPERVISION 52 TC-2 -VE CB HEALTHYNESS TSR TSR LED LED 52b 52b
MAIN-1 PROTECTION OPERATED 21 MAIN-1 BINARY OUTPUT TO LBB TO TC-1 TO TC-2 TO LBB TO TC-1 TO TC-2 TO TC-1 TO TC-2 TO TC-1 TO TC-2 TO LBB TO TC-1 TO TC-2 TO TC-1 TO TC-2 +VE -VE R PHASE Y PHASE B PHASE 186 R1 186 R2 186 Y1 186 Y2 186 B1 186 B2
MAIN-2 PROTECTION OPERATED 21 MAIN-2 BINARY OUTPUT TO LBB TO TC-1 TO TC-2 TO LBB TO TC-1 TO TC-2 TO TC-1 TO TC-2 TO TC-1 TO TC-2 TO LBB TO TC-1 TO TC-2 TO TC-1 TO TC-2 +VE -VE R PHASE Y PHASE B PHASE 286 R1 286 R2 286 Y1 286 Y2 286 B1 286 B2
86 GA (MASTER TRIP RELAY) OPERATION 21 MAIN-1 TO ANN +VE -VE RESET OPERATED PB TO CL I/L TO LBB TO TC-1 TO TC-2 TO M1 DR TO M2 DR TO SER 86 GA MASTER TRIP RELAY M1 BUILT IN FUNCTIONS TEED-1 PROTECTION OVER VOLTAGE STAGE-1 PROT DIRECT TRIP CHANNEL-1 RECEIVED
86 GB (MASTER TRIP RELAY) OPERATION 21 MAIN-2 TO ANN +VE -VE RESET OPERATED PB TO CL I/L TO LBB TO TC-1 TO TC-2 TO M1 DR TO M2 DR TO SER 86 GB MASTER TRIP RELAY M2 BUILT IN FUNCTIONS TEED-2 PROTECTION OVER VOLTAGE STAGE-2 PROT LBB/BFR RELAY DIRECT TRIP CHANNEL-2 RECEIVED
87 BUSBAR-1 PROTECTION TRIPPING SCHEME HIGH SPEED TRIP RELAY (96BB) FOR BAY1 HIGH SPEED TRIP RELAY (96BB) FOR BAY2 HIGH SPEED TRIP RELAY (96 BB) FOR BAY3 HIGH SPEED TRIP RELAY (96 BB) FOR BAY4 HIGH SPEED TRIP RELAY (96BB)FOR BAY5 HIGH SPEED TRIP RELAY (96 BB) FOR BAY6 BAY1 CR PANEL TRIP FROM 50 LBB TO START 50 LBB BAY2 CB PANEL TRIP FROM 50 LBB TO START 50 LBB BAY3 CB PANEL TRIP FROM 50 LBB TO START 50 LBB BAY4 CB PANEL TRIP FROM 50 LBB TO START 50 LBB BAY5 CB PANEL TRIP FROM 50 LBB TO START 50 LBB BAY6 CB PANEL TRIP FROM 50 LBB TO START 50 LBB +VE BUSBAR PANEL 87 BUSBAR
96 BB (MASTER TRIP RELAY) OPERATION 87 BUSBAR TO D/T-1 +VE -VE RESET OPERATED PB TO CL I/L TO LBB TO TC-1 TO TC-2 TO M1 DR TO M2 DR TO D/T-2 96 BB MASTER TRIP RELAY TO ANNUN TO SER FROM LBB
TRANSFORMER TROUBLES TRIPPING GR-A OIL TEMP TRIP BUCHHOLZ TRIP PRD-1 TRIP PRD-2 TRIP DIFF RELAY 87T OL RELAY 51OL HV O/L+E/F PROT 67 86 AX 86 AY TO 3PH GR-A 400KV MAIN TO 3PH GR-A 220KV MAIN NDR RELAY 151N HV O/F RELAY 99T +VE +VE -VE
TRANSFORMER TROUBLES TRIPPING GR-B REF RELAY 64REF STUB RELAY 50ST LV O/L+E/F PROT 67 86 BX 86 BY TO 3PH GR-B 400KV MAIN TO 3PH GR-B 220KV MAIN LV O/F RELAY 99T OLTC BUCHHOLZ-R TRIP OLTC BUCHHOLZ-Y TRIP OLTC BUCHHOLZ –B TRIP WNDG TEMP-HV TRIP WNDG TEMP-LV TRIP WNDG TEMP-IV TRIP +VE +VE -VE
LBB Operation & Output INITIATION 186 R 186 Y 186 B 286 R 286 Y 286 B 86 GR-A 86 GR-B 96 BB +VE TO D/T CH-1 TO D/T CH-2 TO ANNUN TO MAIN1 DR TO MAIN2 DR TO SER TO 86 GR-A TO 86 GR-B TO BUSBAR -VE 50X LBB / BFR TIMER
TRIP COIL-1 CIRCUITS 186R1 186R2 286R1 286R2 86GR-A 86GR-B 96BB 186Y1 186Y2 286Y1 286Y2 186B1 186B2 286B1 286B2 186R1, 186R2, 186Y1, 186Y2, 186B1, 186B2 ARE CB 1-PH TRIP UNIT OF GR-A. THESE ARE SELF RESETING. 286R1, 286R2, 286Y1, 286Y2, 286B1, 286B2 ARE CB 1-PH TRIP UNIT OF GR-B. THESE ARE SELF RESETING. THE BELOW ARE HAND RESETING. 86GR-A, 86GR-B ARE 3-PH TRIP UNITS. 96 BB IS BUSBAR TRIPPING RELAY TRIP COIL-1
TRIP COIL-2 CIRCUITS 186R1 186R2 286R1 286R2 86GR-A 86GR-B 96BB 186Y1 186Y2 286Y1 286Y2 186B1 186B2 286B1 286B2 186R1, 186R2, 186Y1, 186Y2, 186B1, 186B2 ARE CB 1-PH TRIP UNIT OF GR-A. THESE ARE SELF RESETING. 286R1, 286R2, 286Y1, 286Y2, 286B1, 286B2 ARE CB 1-PH TRIP UNIT OF GR-B. THESE ARE SELF RESETING. THE BELOW ARE HAND RESETING. 86GR-A, 86GR-B ARE 3-PH TRIP UNITS. 96 BB IS BUSBAR TRIPPING RELAY TRIP COIL-2
CB CONTACT MULTIPLICATION S.No R-PHASE Y-PHASE B- PHASE REF PURPOSE A-POLE B-POLE C-POLE 1 A11,A12 B11,B12 C11,C12 2 A13,A14 B13,B14 C13,C14 3 A15,A16 B15,B16 C15,C16 4 A17,A18 B17,B18 C17,C18 5 A19,A20 B19,B20 C19,C20 6 A21,A22 B21,B22 C21,C22 7 A23,A24 B23,B24 C23,C24 8 A25,A26 B25,B26 C25,C26 9 A41,A42 B41,B42 C41,C42 10 A43,A44 B43,B44 C43,C44 11 A45,A46 B45,B46 C45,C46 12 A47,A48 B47,B48 C47,C48 13 A49,A50 B49,B50 C49,C50 14 A51,A52 B51,B52 C51,C52 15 A53,A54 B53,B54 C53,C54 16 A55,A56 B55,B56 C55,C56
PROTECTION COUPLER PANEL C E DISPLAY ACTIVE START TRIP NSD 50/ NSD 70 G4AC TB: V9LC 1- 2+ 5- 6+ 9- 10+ 13- 14+ TX TRIP A(C) RX TRIP A(C) TX TRIP B(D) RX TRIP B(D) C S C S C R C R GA4D TB:V9LD 1- 2+ 5- 6+ 9- 10+ 13- 14+ TX TRIP C(A) RX TRIP C(A) TX TRIP D(B) RX TRIP D(B) C S C S C R C R G4AA TB: V9LB ALARM-1 250V DC ALARM-2 250V DC 5 6 7 8
PROTECTION COUPLERS FOR 400KV LINE  FOR EACH LINE 2Nos PROTECTION COUPLER PANELS PROVIDED.  FOR EACH LINE 1NO CARRIER SPEECH PANEL PROVIDED.  SO, ONE LINE REQUIRES TOTAL 3 PANELS.  CARRIER SPEECH PANEL PURELY FOR VOICE COMMUNICATION BETWEEN TWO SUBSTATIONS, i.e THE LINE CONNECTED SUBSTATIONS.  THE VOICE COMMUNICATION ARE TWO METHODS PROVIDED.  ONE IS HOTLINE COMMUNICATION/DEDICATED/ LIFT&TALK METHOD.  ANOTHER IS DIAL METHOD.  IN PROTECTION COUPLER PANEL-1 TOTAL 3 CARDS ARE IMPORTANT FOR SENDING & RECEIVING TRIP SIGNALS.  ONE CARD FOR ALARM i.e G4AA. ONE CARD FOR PERMISSIVE/PROTECTION TRIP i.e G4AC & ANOTHER CARD FOR DIRECT TRIPS i.e G4AD.  IN PROTECTION COUPLER-2 PANEL ALSO 3 CARDS ARE PROVIDED SIMILAR TO PROTECTION COUPLER-1 PANEL.  THE PROTECTION COUPLER PANEL DRAWING IS SHOWN IN PREVIOUS MENU.  1SET TX & RX FOR PERMISSIVE/ PROTECTION TRIP(G4AC)  1SET TX & RX FOR BACKUP FOR PERMISSIVE/ PROTECTION IN ANOTHER PANEL(G4AC).  1SET TX & RX FOR DIRECT TRIP CHANNEL-1( G4AD).  1SET TX & RX FOR SPARE UNDER EMERGENCY(G4AD).  THE ABOVE ARRANGEMENT SIMILAR FOR PROTECTION COUPLER PANEL-2.  G4AA CARD FOR ALARM.
MAIN-1 PROTECTION CARRIER INTER TRIPPING ABB REL521 CR CS -VE CARRIER RECEIVE CARRIER SEND ALARM IN ABB NSD 50 OUT PANEL-1 PANEL-2 G4AC V9LC 1 G4AC V9LC 2 G4AC V9LC 5 G4AC V9LC 6 G4AA V9LB 5 G4AA V9LB 6 ABB NSD 50 G4AC V9LC 10 G4AC V9LC 14 G4AC V9LC 9 G4AC V9LC 13 THIS IS BACKUP FOR PERMISSIVE/ PROTECTION TRIP AND CONNECTED IN ANOTHER PANEL +VE -VE
MAIN-2 PROTECTION CARRIER INTER TRIPPING ABB REL316 CR CS -VE CARRIER RECEIVE CARRIER SEND ALARM IN ABB NSD 50 OUT PANEL-2 PANEL-1 G4AC V9LC 1 G4AC V9LC 2 G4AC V9LC 5 G4AC V9LC 6 G4AA V9LB 5 G4AA V9LB 6 ABB NSD 50 G4AC V9LC 10 G4AC V9LC 14 G4AC V9LC 9 G4AC V9LC 13 THIS IS BACKUP FOR PERMISSIVE/ PROTECTION TRIP AND CONNECTED IN ANOTHER PANEL +VE -VE
DIRECT TRIP SEND CARRIER CHANNEL-1 T N C MAIN CB(1-52CB) CONTROL PANEL 87 BUSBAR TRIP (ZONE-1) 50 LBB/BFR ABB NSD 50 DC +VE FROM PANEL G4AD V9LC 2 DC –VE FROM PANEL G4AD V9LC 1 PANEL-1 BUSBAR PROTECTION PANEL RELAY PANEL . OVER VOLTAGE STAGE 1 or 2
DIRECT TRIP SEND CARRIER CHANNEL-2 T N C MAIN CB(1-52CB) CONTROL PANEL 87 BUSBAR TRIP (ZONE-1) 50 LBB/BFR ABB NSD 50 DC +VE FROM PANEL G4AD V9LC 2 DC –VE FROM PANEL G4AD V9LC 1 PANEL-2 BUSBAR PROTECTION PANEL RELAY PANEL . OVER VOLTAGE STAGE 1 or 2
DIRECT TRIP RECEIVE CHANNEL-1&2 ABB NSD 50 G4AD V9LC 6 G4AD V9LC 5 ABB NSD 50 G4AD V9LC 6 G4AD V9LC 5 PANEL-1 PANEL-2 DC +VE DC +VE +VE -VE TO 86-A MASTER TRIP RELAY (HIGH SPEED TRIP RELAY) TO 86-B MASTER TRIP RELAY (HIGH SPEED TRIP RELAY) DIRECT TRIP-1 CARRIER RECEIVE RELAY DIRECT TRIP-2 CARRIER RECEIVE RELAY TO ANNUNCIATION TO MAIN1 DR TO MAIN2 DR TO ANNUNCIATION TO MAIN1 DR TO MAIN2 DR

More Related Content

PPTX
Electro Mechanical v/s Numerical Relay
SWAPNIL GHAISAS
 
PDF
Protection and Switchgear
Velalar College of Engineering and Technology
 
PDF
Sample calculation-for-differential-relays
Roberto Costa
 
ODP
Transformers protection, an introduction
H. Kheir
 
PPTX
ct pt testing...........................................
hiiarindam
 
PDF
Protective Device Coordination
joeengi
 
PPTX
Basics of overcurrent protection
Said Salim Palayi
 
PDF
Transformer differential protection
michaeljmack
 
Electro Mechanical v/s Numerical Relay
SWAPNIL GHAISAS
 
Protection and Switchgear
Velalar College of Engineering and Technology
 
Sample calculation-for-differential-relays
Roberto Costa
 
Transformers protection, an introduction
H. Kheir
 
ct pt testing...........................................
hiiarindam
 
Protective Device Coordination
joeengi
 
Basics of overcurrent protection
Said Salim Palayi
 
Transformer differential protection
michaeljmack
 

What's hot (20)

PPTX
Protection & switchgear
johny renoald
 
PDF
Overcurrent coordination
Vincent Wedelich, PE MBA
 
PPTX
FEEDER AND BUS BAR PROTECTION
Dr. Rohit Babu
 
PPTX
Generator and Transformer Protection (PART 2)
Dr. Rohit Babu
 
PPTX
Calculation of short circuit currents
Maria Romina Angustia
 
PDF
ETAP - Coordination and protecion 2
Himmelstern
 
PDF
Single line diagram ats apfc
Sajeewa Lakmal
 
PPTX
Protection of transformer
Sumeet Ratnawat
 
PPTX
Over current protection
SHUBHAM KUMAR
 
PDF
LBB & BUSBAR PPT Rev 4.5.pdf
KriteshKumar12
 
PPTX
Generator protection
Keshar Rawal
 
PPTX
Relay coordination
D Målîk
 
PDF
Generator protection
Parimal Bhagat
 
PPTX
Lecture 7 Relay Coordination.pptx
ssuserb444c3
 
PPT
24620708 feeder-protection (1)
Adarsh Verma
 
PPTX
Transformer Repair Workshop Report [EEE]
Nik Sharma
 
PDF
ETAP - Short circuit analysis iec standard
Himmelstern
 
PPTX
Protection Of Generator
Rahuldey1991
 
PDF
Bus Bar protection
srini09
 
PDF
Short circuit current calculations
Ronald Santos
 
Protection & switchgear
johny renoald
 
Overcurrent coordination
Vincent Wedelich, PE MBA
 
FEEDER AND BUS BAR PROTECTION
Dr. Rohit Babu
 
Generator and Transformer Protection (PART 2)
Dr. Rohit Babu
 
Calculation of short circuit currents
Maria Romina Angustia
 
ETAP - Coordination and protecion 2
Himmelstern
 
Single line diagram ats apfc
Sajeewa Lakmal
 
Protection of transformer
Sumeet Ratnawat
 
Over current protection
SHUBHAM KUMAR
 
LBB & BUSBAR PPT Rev 4.5.pdf
KriteshKumar12
 
Generator protection
Keshar Rawal
 
Relay coordination
D Målîk
 
Generator protection
Parimal Bhagat
 
Lecture 7 Relay Coordination.pptx
ssuserb444c3
 
24620708 feeder-protection (1)
Adarsh Verma
 
Transformer Repair Workshop Report [EEE]
Nik Sharma
 
ETAP - Short circuit analysis iec standard
Himmelstern
 
Protection Of Generator
Rahuldey1991
 
Bus Bar protection
srini09
 
Short circuit current calculations
Ronald Santos
 
Ad

Similar to INTERFACING.ppt (20)

PDF
220kV Substation Equipment Bus Scheme & Operation Procedure Testing & Mainten...
Anbarasu Balakrishnan
 
PPTX
ppt on industrial training of final year studen from ptcul 132kv substation ...
surendra rawat
 
PPT
Alternator printing.pptAlternator printing.pptAlternator printing.pptAlternat...
Alfatih Mattar
 
PPT
AUDIO FREQUENCY TRACK CIRCUITS
sspardesh
 
PDF
891 Switchboard vs. 1558 Switchgear
michaeljmack
 
PPTX
C.S.P.D.C.L.AMBIKAPUR (TOWN)
saurabhVEC
 
PDF
RELAY ETTING CALCULATION REV-A (DG-298).pdf
JayWin2
 
PDF
400 kv nelmangala
Mayur Dhanaji Rane
 
PDF
Original Power Supply IC LNK616PG LNK616P LNK616 DIP-7 New
AUTHELECTRONIC
 
PPTX
Presentation (2).pptx
TejusManikandan
 
PDF
Electrical
krishnendu syam
 
PDF
schems contactors and relays(Autosaved).pdf
MohammadAshour29
 
PDF
Wiring_Diagram_Book.pdf
MuneerHaq
 
PDF
Lm 741 datasheet
Andy Medina
 
PPT
electrical.ppt
AdityanshuBehera
 
PDF
INPUT OUTPUT LIST.pdf
NIRALIPRAJAPATI13
 
PDF
Original Transistor NPN MJE13003 KSE13003 E13003 13003 1.5A 400V TO-126 New
AUTHELECTRONIC
 
PPT
CIRCUIT BREAKER USED IN THERMAL POWER PLANTS
DigantaSinha1
 
PDF
A110x
Alfredo Santillan
 
PPTX
132 kV uppcl
Abrar Ahamed
 
220kV Substation Equipment Bus Scheme & Operation Procedure Testing & Mainten...
Anbarasu Balakrishnan
 
ppt on industrial training of final year studen from ptcul 132kv substation ...
surendra rawat
 
Alternator printing.pptAlternator printing.pptAlternator printing.pptAlternat...
Alfatih Mattar
 
AUDIO FREQUENCY TRACK CIRCUITS
sspardesh
 
891 Switchboard vs. 1558 Switchgear
michaeljmack
 
C.S.P.D.C.L.AMBIKAPUR (TOWN)
saurabhVEC
 
RELAY ETTING CALCULATION REV-A (DG-298).pdf
JayWin2
 
400 kv nelmangala
Mayur Dhanaji Rane
 
Original Power Supply IC LNK616PG LNK616P LNK616 DIP-7 New
AUTHELECTRONIC
 
Presentation (2).pptx
TejusManikandan
 
Electrical
krishnendu syam
 
schems contactors and relays(Autosaved).pdf
MohammadAshour29
 
Wiring_Diagram_Book.pdf
MuneerHaq
 
Lm 741 datasheet
Andy Medina
 
electrical.ppt
AdityanshuBehera
 
INPUT OUTPUT LIST.pdf
NIRALIPRAJAPATI13
 
Original Transistor NPN MJE13003 KSE13003 E13003 13003 1.5A 400V TO-126 New
AUTHELECTRONIC
 
CIRCUIT BREAKER USED IN THERMAL POWER PLANTS
DigantaSinha1
 
A110x
Alfredo Santillan
 
132 kV uppcl
Abrar Ahamed
 
Ad

Recently uploaded (20)

PDF
Urban Design Final Project-Context
nicolebrog1
 
PDF
321 LIBRARY DESIGN.pdf43354445t6556t5656
itunudaramola0
 
PDF
ART & DESIGN HISTORY OF VEDIC CIVILISATION.pdf
Tanisha Ranbida
 
PDF
2025_AIFG_Akane_Kikuchi_Empathy_Design.PDF
Akane Kikuchi
 
PPTX
Entrepreneur intro, origin, process, method
SANGEETHA PRIYA B
 
PDF
THEORY OF ID MODULE (Interior Design Subject)
MinamiFranco
 
PPTX
CLASS_11_BUSINESS_STUDIES_PPT_CHAPTER_1_Business_Trade_Commerce.pptx
PRITTHAKKAR7
 
PPT
aksharma-dfs.pptgfgfgdfgdgdfgdfgdgdrgdgdgdgdgdgadgdgd
HassanKaraman3
 
PPTX
Media And Information Literacy for Grade 12
CaloyMasion
 
PDF
2025CategoryRanking of technology university
SyedHaiderAliShah12
 
PDF
intro_to_rust.pptx_123456789012446789.pdf
soumyadipiitk231026
 
PDF
Test slideshare presentation for blog post
thomasguiart1
 
PDF
Chalkpiece Annual Report from 2019 To 2025
ramyaux
 
PDF
Interior Structure and Construction A1 NGYANQI
yqsuniacc0o0
 
PPTX
VERNACULAR_DESIGN_PPT FINAL WITH PROPOSED PLAN.pptx
banikishika701
 
PDF
Architecture Design Portfolio- VICTOR OKUTU
TamaraminyendeOkutu1
 
PPT
pump pump is a mechanism that is used to transfer a liquid from one place to ...
gunjankolhezn
 
PPTX
CLASSIFICATION OF YARN- process, explanation
SANGEETHA PRIYA B
 
PPTX
timber basics in structure mechanics (dos)
shivagamingoff
 
PPTX
EDP Competencies-types, process, explanation
SANGEETHA PRIYA B
 
Urban Design Final Project-Context
nicolebrog1
 
321 LIBRARY DESIGN.pdf43354445t6556t5656
itunudaramola0
 
ART & DESIGN HISTORY OF VEDIC CIVILISATION.pdf
Tanisha Ranbida
 
2025_AIFG_Akane_Kikuchi_Empathy_Design.PDF
Akane Kikuchi
 
Entrepreneur intro, origin, process, method
SANGEETHA PRIYA B
 
THEORY OF ID MODULE (Interior Design Subject)
MinamiFranco
 
CLASS_11_BUSINESS_STUDIES_PPT_CHAPTER_1_Business_Trade_Commerce.pptx
PRITTHAKKAR7
 
aksharma-dfs.pptgfgfgdfgdgdfgdfgdgdrgdgdgdgdgdgadgdgd
HassanKaraman3
 
Media And Information Literacy for Grade 12
CaloyMasion
 
2025CategoryRanking of technology university
SyedHaiderAliShah12
 
intro_to_rust.pptx_123456789012446789.pdf
soumyadipiitk231026
 
Test slideshare presentation for blog post
thomasguiart1
 
Chalkpiece Annual Report from 2019 To 2025
ramyaux
 
Interior Structure and Construction A1 NGYANQI
yqsuniacc0o0
 
VERNACULAR_DESIGN_PPT FINAL WITH PROPOSED PLAN.pptx
banikishika701
 
Architecture Design Portfolio- VICTOR OKUTU
TamaraminyendeOkutu1
 
pump pump is a mechanism that is used to transfer a liquid from one place to ...
gunjankolhezn
 
CLASSIFICATION OF YARN- process, explanation
SANGEETHA PRIYA B
 
timber basics in structure mechanics (dos)
shivagamingoff
 
EDP Competencies-types, process, explanation
SANGEETHA PRIYA B
 

INTERFACING.ppt

  • 2. BASICS 1. NO & NC CONTACTS 2. CIRCUIT BREAKER AUX SWITCH 3. ISOLATOR AUX SWITCH 4. PRESSURE SWITCH & DENSITY MONITOR 5. ANNUNCIATION 6. INDICATION 7. SEMOPHORE 8. CB OPERATING MECHANISAMS 9. CB ARC QUENCHING METHODS 10. INTERLOCKS BETWEEN CB & ISO 11. INTERLOCKS FOR LOCAL CLOSE OF CB 12. INTERLOCKS FOR REMOTE CLOSE OF CB 13. INTERLOCKS FOR ISOLATOR 14. INTERLOCKS FOR EARTH SWITCH 15. CB CLOSING CIRCUIT 16. CB TRIPPING CIRCUIT 17. WHAT IS BISTABLE RELAYS-NORMAL SWITCH 18. WHAT IS MONOSTABLE RELAYS-BELL SWITCH 19. ANTIPUMPING CONTACTOR 20. WHAT IS TSR & PRE CLOSE & POST CLOSE 21. AC FAIL CONTACTOR 22. DC FAIL CONTACTOR 23. SYNCHROSCOPE SOCKET – REQUIREMENTS – CONDITIONS 24. CB POLE DISCREPANCY RELAY 25. BINARY INPUT & BINARY OUTPUT OF RELAY 26. TNC SWITCH 27. LOCAL REMOTE SWITCH 28. SPRING CHARGE LIMIT SWITCH 29. TYPES OF WIRING- INTRA, INTER & CABLE SCHEDULE 30. PT / CVT IN MB 31. PT DISTRIBUTION 32. BUS PT SELCTION LOGIC 33. BUSPT LINE CVT SELECTOR SWITCH 34. CT IN MB & CORE CLASS & TERMINATION & STAR FORMATION FOR BUS & CIRCUIT 35. STANDARDS FOLLOWING 36. CABLE SCHEDULE
  • 3. C & R Panel Contains 1. AC Circuits 2. DC Circuits 3. CT Circuits 4. PT/CVT Circuits
  • 4. PURPOSE OF AC CIRCUITS 1. DOOR LAMP 2. PANEL HEATER 3. PLUG SOCKET 4. AUX SUPPLY TO ANNUNCIATION FACIA 5. AUXILIARY SUPPLY TO TRANSDUCER CKT 6. DC FAIL CIRCUIT AC CIRCUITS are to be Extended to 1. Control Panel 2. Circuit Breaker Marshaling Box 3. Switch Yard Bay Marshalling Box 4. Current Transformer Marshalling Box 5. CVT / PT / EMVT Marshalling Box 6. ISOLATOR Operation (3-Ph) 7. Circuit Breaker Operating Mechanism Drive(3-Ph)
  • 5. PURPOSE OF DC CIRCUITS 1. INDICATION CIRCUITS 2. ANNUNCIATION CIRCUITS 3. CB CLOSING COIL & TRIP COIL-1 CKT 4. CB TRIP COIL-2 CKT 5. TO SYNCHRONISATION CIRCUIT 6. TO MAIN-1(21M1/ 87T) PROTECTION 7. TO MAIN-2 or BU(21M2/ 67) PROTECTION 8. TO AC SUPERVISION 9. TO ISOLATOR CONTROL 10. TO ISOLATOR INTERLOCK
  • 6. INDICATION CIRCUITS 1. CB 52 CLOSE & OPEN 2. CB 52 TC-1 HEALTHY 3. CB 52 TC-2 HEALTHY 4. CB 52 SPRING CHARGED 5. CB 52 CAPACITOR CHARGED 6. CB 52 SEMAPHORE INDICATIOR 7. BUS ISOLATOR 29/89 CLOSE & OPEN 8. BUS ISO 29/89 SEMAPHORE INDICATOR 9. LINE ISOLATOR 29/89L CLOSE & OPEN 10.LINE ISO 29/89L SEMAPHORE INDICATOR
  • 7. GROUP - A & GROUP - B TRIPPINGS For 400KV Stations there shall be two separate Battery systems available for Protection, Control & Tripping/Closing Operations. To obtain Redundancy and to be able to take Protection out for Maintenance, while Equipment is in service, the Relays are Electrically and Physically segregated in to two groups. Grouping is done to the extent possible in such a way that each group can independently carryout Protective functions with near equal redundancy. Inter connection of these two groups shall not be generally be attempted. DISTRIBUTION OF DC SUPPLY SHALL BE DONE BAY WISE TO FEED THE FOLLOWING 1. PROTECTION 2. CB CONTROL 3. ISOLATOR / EARTH SWITCH CONTROL 4. ANNUNCIATION / INDICATION LINE PROTECTION TRANSFORMER PROTECTION REACTOR PROTECTION GROUP-A MAIN-1 PROTECTION M1 BUILT IN FUNCTIONS TEED-1 PROTECTION OVER VOLTAGE STAGE-1 PROT DIRECT TRIP CHANNEL-1 RECEIVED GROUP-B MAIN-2 PROTCTION M2 BUILT IN FUNCTIONS TEED-2 PROTECTION OVER VOLTAGE STAGE-2 PROT LBB/BFR RELAY DIRECT TRIP CHANNEL-2 RECEIVED GROUP-A T/F DIFFERENTIAL RELAY T/F HV BACKUP RELAY T/F IMP / 21T RELAY T/F HV OVERFLUX RELAY OIL TEMP HIGH TRIP PRESURE RELIEF TRIP TERITIARY DELTA WNDG NDR PROT GROUP-B T/F REF / HIGH Z DIFF RELAY BUCHHOLZ TRIP T/F LV BACKUP RELAY T/F NEUTRAL CURRENT / 51 O/C RLY T/F LV OVERFLUX RELAY OVER LOAD PROT (ALARM ONLY) OLTC BUCHHOLZ TRIP WINDING TEMP HIGH TRIP LOW/ HIGH OIL LEVEL TRIP GROUP-A REACTOR DIFFERENTIAL RELAY REACTOR BACKUP / 21R RELAY OIL TEMP HIGH TRIP PRESURE RELIEF TRIP GROUP-B REACTOR REF RELAY BUCHHOLZ TRIP WINDING TEMP HIGH TRIP LOW/ HIGH OIL LEVEL TRIP FIRE PROTECTION TRIP
  • 8. VOLTAGE SUPPLY SELECTION BUS-1 BUS-2 89A 89B 52 CB 3 CT 89L LINE PT/EMVT PT/EMVT WAVE TRAP CVT LA/SA IF 89A ISOLATOR CLOSED BUS-1 PT VOLTAGE WILL BE SELECTED IF 89B ISOLATOR CLOSED BUS-2 PT VOLTAGE WILL BE SELECTED IF VOLTAGE SELECTOR SWITCH IS KEPT IN BUS THEN BUS PT VOLTAGE IS EXTENDED TO RELAY IF VOLTAGE SELECTOR SWITCH IS KEPT IN LINE THEN LINE CVT VOLTAGE IS EXTENDED TO RELAY THE CIRCUIT DIAGRAM SHOWN IN NEXT PRESENTATION BUS-1 & BUS-2 PT IS COMING TO PT DISTRIBUTION BOX AND DISTRIBUTED FURTHER.
  • 9. VOLTAGE SUPPLY SELECTION 89A BUS-1 ISOLATOR +VE -VE R Y B N BUS-1 PT SUPPLY 89B BUS-2 ISOLATOR +VE -VE R Y B N BUS-2 PT SUPPLY 89BX 89AX R Y B N LINE CVT SUPPLY BUS PT LINE CVT N MANUAL VOLTAGE SELECTOR SWITCH. 21 MAIN-1 OR 21 MAIN-2 PROT RELAY
  • 10. CT NAME PLATE DETAILS CORE CLASS OF ACCURAC Y RATIO PRIMAR Y WINDIN G SECONDA RY WINDING KNEE POINT VOLTAGE MAGNETISIN G CURRENT CORE RESISTANC E 1 PS (PROTECT ION) 500/1 PI – P2 1S1 – 1S2 1000V 120mA 2.5 OHMS 1000/1 1S1 – 1S3 2000V 60mA 5.0 OHMS 2000/1 1S1 – 1S4 4000V 30mA 10.0 OHMS 2 PS (PROTECT ION) 500/1 PI – P2 2S1 – 2S2 1000V 120mA 2.5 OHMS 1000/1 2S1 – 2S3 2000V 60mA 5.0 OHMS 2000/1 2S1 – 2S4 4000V 30mA 10.0 OHMS 3 0.2 (METERIN G) 500/1 PI – P2 3S1 – 3S2 BURDEN = 40VA 1000/1 3S1 – 3S3 2000/1 3S1 – 3S4 4 PS (PROTECT ION) 500/1 PI – P2 4S1 – 4S2 1000V 120mA 2.5 OHMS 1000/1 4S1 – 4S3 2000V 60mA 5.0 OHMS 2000/1 4S1 – 4S4 4000V 30mA 10.0 OHMS 5 PS (PROTECT ION) 500/1 PI – P2 5S1 – 5S2 1000V 120mA 2.5 OHMS 1000/1 5S1 – 5S3 2000V 60mA 5.0 OHMS 2000/1 5S1 – 5S4 4000V 30mA 10.0 OHMS
  • 11. CVT NAME PLATE DETAILS CORE CLASS OF ACCURACY PRIMARY WINDING SECONDAR Y WINDING PRIMARY VOLTAGE SECONDARY VOLTAGE VA BURDEN 1 3P (PROTECTIO N) P1 – E 1a1 – 1n 1a2 – 1n 220KV / √3 110V / √3 200 VA 2 3P (PROTECTIO N) P1 – E 2a1 – 2n 2a2 – 2n 220KV / √3 110V / √3 200 VA 3 0.2 (METERING) P1 – E 3a1 – 3n 3a2 – 3n 220KV / √3 110V / √3 100 VA CORE CLASS OF ACCURACY PRIMARY WINDING SECONDAR Y WINDING PRIMARY VOLTAGE SECONDARY VOLTAGE VA BURDEN 1 3P (PROTECTIO N) P1 – E 1a1 – 1n 1a2 – 1n 400KV / √3 110V / √3 200 VA 2 3P (PROTECTIO N) P1 – E 2a1 – 2n 2a2 – 2n 400KV / √3 110V / √3 200 VA 3 0.2 (METERING) P1 – E 3a1 – 3n 3a2 – 3n 400KV / √3 110V / √3 100 VA
  • 12. PT / EMVT NAME PLATE DETAILS CORE CLASS OF ACCURACY PRIMARY WINDING SECONDAR Y WINDING PRIMARY VOLTAGE SECONDARY VOLTAGE VA BURDEN 1 0.2 (METERING) P1 – E 1a1 – 1n 1a2 – 1n 132KV / √3 110V / √3 100 VA 2 0.5 (PROTECTIO N) P1 – E 2a1 – 2n 2a2 – 2n 132KV / √3 110V / √3 100 VA 3 3P (PROTECTIO N) P1 – E 3a1 – 3n 3a2 – 3n 132KV / √3 110V / √3 100 VA CORE CLASS OF ACCURACY PRIMARY WINDING SECONDAR Y WINDING PRIMARY VOLTAGE SECONDARY VOLTAGE VA BURDEN 1 3P (PROTECTIO N) P1 – E 1a1 – 1n 1a2 – 1n 220KV / √3 110V / √3 200 VA 2 3P (PROTECTIO N) P1 – E 2a1 – 2n 2a2 – 2n 220KV / √3 110V / √3 200 VA 3 0.2 P1 – E 3a1 – 3n 3a2 – 3n 220KV / √3 110V / √3 100 VA
  • 13. BUS PT AT YARD U U U U U U U U U U U U U U U U U U BUS-1 PT/EMVT PRIMARY VOLTAGE 220 KV / 1.732 SECONDARY VOLTAGE 110V/1.732 P1 U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U TO CONTROL ROOM PT DISTRIBUTION PANEL U U U U U U U U U U U U U U U U U U BUS-2 PT/EMVT PRIMARY VOLTAGE 220 KV / 1.732 SECONDARY VOLTAGE 110V/1.732 P1 U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U TO CONTROL ROOM PT DISTRIBUTION PANEL BUS-1 BUS-2 METERING CL: 0.2 MAIN-2 PROT CL:3P MAIN-1 PROT CL:3P OPEN DELTA CL: 0.5 METERING CL: 0.2 MAIN-2 PROT CL:3P MAIN-1 PROT CL:3P OPEN DELTA CL: 0.5 PTMB PTMB
  • 14. BUS PT DISTRIBUTION PANEL (EXCEPT FOR 1-1/2CB / DBDCB / RING SYSTEM) X02 1 2 3 4 5 6 7 8 9 10 11 12 13 14 1 2 3 4 5 6 7 8 9 10 11 12 13 14 X12 X22 1 2 3 4 5 6 7 8 9 10 11 12 13 14 51 52 53 54 55 56 57 58 59 60 61 62 63 64 X02 BUS-1 PT DISTRIBUTION BUS-2 PT DISTRIBUTION TO INDIVIDUAL C&R PANEL EACH SET FOR EACH CIRCUIT
  • 15. PT/CVT & CT MARSHLING BOX TB 1 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 TB 2 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 TB 3 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 TB 4 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 TB 5 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 TB 1 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 TB 2 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 TB 3 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 CT MARSHELLING BOX CVT/PT MARSHELLING BOX TB 6 1 2 3 4 5 6 7 8 9 10 TB 4 1 2 3 4 5 6 7 8 9 10
  • 16. BAY MARSHLING BOX TB 1 1 50 TB 2 51 100 TB 3 101 150 TB 4 151 200 TB 5 201 250 BAY MARSHELLING BOX BACK VIEW TB DISTRIBUTION BAY MARSHELLING BOX FRONT VIEW AC DISTRIBUTION MAIN MCB 3-PH 100A MCB -1 3-PH 25A MCB -2 3-PH 25A MAIN - 3 3-PH 10A MCB - 4 3-PH 10A MCB - 5 3-PH 10A MAIN - 6 3-PH 10A MCB - 8 3-PH 10A MAIN - 9 3-PH 10A MCB - 10 3-PH 10A MCB - 11 3-PH 10A MAIN - 12 3-PH 10A MCB - 13 3-PH 10A MAIN - 1 1-PH 5A MCB - 2 1-PH 5A MCB - 3 1-PH 5A MAIN - 4 1-PH 5A MCB - 5 1-PH 5A
  • 17. IMPORTANT GUIDELINES CT & VT Earthing  CT / VT secondary neutrals should be earthed at one point only.  VT secondary neutral earthing is done at equipment itself.  It is preferable to earth the CT secondary neutral in the control / protection cubicle in order to provide maximum security to the operating personnel. CT POLARITY  As a practice the P1 terminal of the CT shall be towards the bus and P2 away from the bus.  From the above for Main-1, Main-2 & Metering – Primary current flows from P1 to P2. Accordingly secondary current Flows S2 to S1. Star formation is all S2s.  For the BBM & BBC – Primary current flows from P2 to P1. Accordingly secondary current Flows S1 to S2. Star formation is all S1s. Please conclude here.
  • 18. CABLE SCHEDULE CABLE SCHEDULE 1. NAME OF THE SUBSTATION: 2. NAME OF THE FEEDER/ TRANSFORMER: 3. CB DETAILS: 4. CT DETAILS 5. CVT / PT / EMVT DETAILS: 6. ISOLATOR DETAILS 7. C&R PANEL DETAILS: 8. POWER TRANSFORMER DETAILS : S.No FROM TO DESCRIPTION / PURPOSE CORE NO REFERENCE PANEL TB No FERRULE PANEL TB No FERRULE Cable ID Cable & Size
  • 19. CABLE SCHEDULE 1 2 3 4 5 6 7 S.No FROM TO PANEL TB No FERRULE PANEL TB No FERRULE 1 R – PH CT CORE - 5 5S1 CTMB TB-5-1 R-5S1 2 5S2 TB-5-2 R-5S2 3 5S3 TB-5-3 R-5S3 4 5S4 TB-5-4 R-5S4 5 Y – PH CT CORE - 5 5S1 CTMB TB-5-6 Y-5S1 6 5S2 TB-5-7 Y-5S2 7 5S3 TB-5-8 Y-5S3 8 5S4 TB-5-9 Y-5S4 9 Y – PH CT CORE - 5 5S1 CTMB TB-5-11 B-5S1 10 5S2 TB-5-12 B-5S2 11 5S3 TB-5-13 B-5S3 12 5S4 TB-5-14 B-5S4
  • 20. CABLE SCHEDULE 8 9 10 11 12 DESCRIPTION / PURPOSE CABLE & SIZE CORE No REFERENCE REMARKS R-PH CT TO CT MB OF CORE-5 4C X 2.5 1 DRG NO: PAGE NO 2 3 4 Y-PH CT TO CT MB OF CORE-5 4C X 2.5 1 DRG NO: PAGE NO 2 3 4 B-PH CT TO CT MB OF CORE-5 4C X 2.5 1 DRG NO: PAGE NO 2 3 4
  • 21. CIRCUIT BREAKER S.No DESCRIPTION INCASE OF CGL BREAKER 1 LOCAL CLOSING INTERLOCK K5, K5A 2 LOCAL CLOSE (IN CB CUBICLE) - - 3 REMOTE CLOSE (FROM CONTROL PANEL HAND CLOSE) K1 4 LOCAL TRIP ( IN CB CUBICLE) - - 5 REMOTE TRIP COIL-1 (FROM CONTROL PANEL HAND TRIP) K21A, K21B, K21C 6 REMOTE TRIP COIL-2 (FROM CONTROL PANEL HAND TRIP) K41A, K41B, K41C 7 CB OPEN INDICATION A11, A12-B11,B12-C11,C12 8 CB CLOSE INDICATION A41, A42-B41,B42-C41,C42 9 DC SUPPLY J1, J2 & J11 & J12 10 PROTECTION CLOSE OR AUTO RE-CLOSE K3 11 PROTECTION TRIP COIL-1 & POST CLOSE SUPERVISION K23A, K23B, K23C 12 PROTECTION TRIP COIL-2 & POST CLOSE SUPERVISION K43A, K43B, K43C 13 PRE CLOSE SUPERVISION OF TRIP COIL-1 K31A, K31B, K31C 14 PRE CLOSE SUPERVISION OF TRIP COIL-2 K49A, K49B, K49C 15 CB CONTACT DICTRIBUTION. NOs – 8, NCs – 8 16 CB POLE DISTURBANCE RELAY. 17 CB CONTACT MULTIPLICATION RELAY. 18 CB TROUBLE ALARMS - 63 AR, GA, GL, AL, AG, AA, OA
  • 22. CIRCUIT BREAKER CLOSING CIRCUIT 52CC 52b J4 63A 63G 63HO 63N SPL 52Y J3 T N C LCIL K1 K3 LOCAL REMOTE K3A K5 52Y 52Y 52Y SLS 52a 86A 86B 96BB T N C SSSS SERVICE BYPASS SSS REMOTE CLOSE 21M1 A/R 21M2 A/R A/R CLOSE CONTROL & RELAY PANEL A/R CLOSE REMOTE CLOSE INTERLOCK
  • 23. CIRCUIT BREAKER TRIPPING CIRCUIT 52TC 52a J4 63A 63G 63HO 63N J3 T N C LOCAL REMOTE PRE CLOSE SUPERVISION PROTECTION TRIP + POST CLOSE SUPERVISION PB EMERGENCY TRIP T N C 52TC 52a J14 63A 63G 63HO 63N PRE CLOSE SUPERVISION PROTECTION TRIP + POST CLOSE SUPERVISION LOCAL REMOTE J13 C&R PANEL T N C PB EMERGENCY TRIP
  • 24. NOMINCLATURES 52 a CB AUX CONTACT OPEN WHEN CB OPEN 52b CB AUX CONTACT CLOSE WHEN CB OPEN 52 CC CB CLSOING COIL 52T C-1 CB TRIP COIL-1 63 A AIR PRESSURE CONTACT 52 TC- 2 CB TRIP COIL-2 63 G SF6 GAS PRESSURE CONTACT 63 HO HYDRAULIC OIL PRESSURE CONTACT 63 N NITROGEN PRESSURE CONTACT 52Y ANTIPUMPING CONTACTOR SP LS SPRING CHARGE LIMIT SWITCH LCIL LOCAL CLOSING INTERLOCK K3 A REMOTE CLOSE TNC TRIP NEUTRAL CLOSE SWITCH 18 6 28 6 MONOSTABLE & SELF RESETING FAST ACTING HIGH SPEED TRIP RELAYS 86 A 86 B 96 BB BISTABLE & HAND RESETING HIGH SPEED TRIP RELAY / MASTER TRIP RELAYS A/ R AUTO RECLOSURE SSS S SYNCHROSCOPE SELECTOR SWITCH SS S SYNCHROSCOPE SOCKET PB PUSH BUTTON LR LOCAL REMOTE SWITCH Synchronization Requirements 1. Voltages must be match 2. Frequency must be match 3. Phase angle must be match 1. Line Voltage 2. Bus Voltage 3. DC Supply 4. Closing Permission
  • 25. LOCAL CLOSING INTERLOCK TAKE AN EXAMPLE OF SINGLE BUS SYSTEM 52 CB BUS 89 / 29 89 / 29 E 89 / 29 L 89 / 29 LE 89 / 29 AE LOCAL CLOSING INTERLOCK DRAWING 89M/B 89 E 89L 89AE K1 K3 REQUIRED INTERLOCK FOR LOCAL CLOSING NORMALLY DURING MAINTANENCE 1. BUS ISOLATOR OPEN CONDITION 2. LINE ISOLATOR OPEN CONDITION 3. 89E EARTH SWITCH CLOSED 4. 89AE EARTH SWITCH CLOSED
  • 26. POLE DISTURBANCE RELAY THIS RELAY COMES IN TO PICTURE THE CIRCUIT BREAKER 3POLES ARE INTER CONNECTED THROUGH ELECTRICALLY NOT MECHANICALLY. WHEN THREE POLES ARE SIMULTANEOUSLY NOT OPEN OR CLOSE THEN THE RELAY ACTS AND TRIPS THE CIRCUIT BREAKER AFTER SOME TIME DELAY. EXAMPLE: 220KV CB, 400KV CB, 765KV CB AND ABOVE VOLTAGE LEVEL R Y B 52a R Y B 52b +VE TIME DELAY RELAY TO SER TO ANNUN TO CB TRIP -VE 52 TC-1-R 52 TC-1-Y 52 TC-1-B 52 TC-2-R 52 TC-2-Y 52 TC-2-B -VE 52 CIRCUIT BREAKER
  • 27. TRIP CIRCUIT HEALTHY TO TC-1 HEALTHY INDICATION TO TC-1 FAULTY ANNUNCIATION +VE TO CB PROTECTION TRIP + POST CLOSE SUPERVISION PRE CLOSE SUPERVISION CONTROL & RELAY PANEL CIRCUIT BREAKER CENTRAL MB 52 TC-1 -VE CB HEALTHYNESS TO TC-2 HEALTHY INDICATION TO TC-2 FAULTY ANNUNCIATION +VE TO CB PROTECTION TRIP + POST CLOSE SUPERVISION PRE CLOSE SUPERVISION 52 TC-2 -VE CB HEALTHYNESS TSR TSR LED LED 52b 52b
  • 28. MAIN-1 PROTECTION OPERATED 21 MAIN-1 BINARY OUTPUT TO LBB TO TC-1 TO TC-2 TO LBB TO TC-1 TO TC-2 TO TC-1 TO TC-2 TO TC-1 TO TC-2 TO LBB TO TC-1 TO TC-2 TO TC-1 TO TC-2 +VE -VE R PHASE Y PHASE B PHASE 186 R1 186 R2 186 Y1 186 Y2 186 B1 186 B2
  • 29. MAIN-2 PROTECTION OPERATED 21 MAIN-2 BINARY OUTPUT TO LBB TO TC-1 TO TC-2 TO LBB TO TC-1 TO TC-2 TO TC-1 TO TC-2 TO TC-1 TO TC-2 TO LBB TO TC-1 TO TC-2 TO TC-1 TO TC-2 +VE -VE R PHASE Y PHASE B PHASE 286 R1 286 R2 286 Y1 286 Y2 286 B1 286 B2
  • 30. 86 GA (MASTER TRIP RELAY) OPERATION 21 MAIN-1 TO ANN +VE -VE RESET OPERATED PB TO CL I/L TO LBB TO TC-1 TO TC-2 TO M1 DR TO M2 DR TO SER 86 GA MASTER TRIP RELAY M1 BUILT IN FUNCTIONS TEED-1 PROTECTION OVER VOLTAGE STAGE-1 PROT DIRECT TRIP CHANNEL-1 RECEIVED
  • 31. 86 GB (MASTER TRIP RELAY) OPERATION 21 MAIN-2 TO ANN +VE -VE RESET OPERATED PB TO CL I/L TO LBB TO TC-1 TO TC-2 TO M1 DR TO M2 DR TO SER 86 GB MASTER TRIP RELAY M2 BUILT IN FUNCTIONS TEED-2 PROTECTION OVER VOLTAGE STAGE-2 PROT LBB/BFR RELAY DIRECT TRIP CHANNEL-2 RECEIVED
  • 32. 87 BUSBAR-1 PROTECTION TRIPPING SCHEME HIGH SPEED TRIP RELAY (96BB) FOR BAY1 HIGH SPEED TRIP RELAY (96BB) FOR BAY2 HIGH SPEED TRIP RELAY (96 BB) FOR BAY3 HIGH SPEED TRIP RELAY (96 BB) FOR BAY4 HIGH SPEED TRIP RELAY (96BB)FOR BAY5 HIGH SPEED TRIP RELAY (96 BB) FOR BAY6 BAY1 CR PANEL TRIP FROM 50 LBB TO START 50 LBB BAY2 CB PANEL TRIP FROM 50 LBB TO START 50 LBB BAY3 CB PANEL TRIP FROM 50 LBB TO START 50 LBB BAY4 CB PANEL TRIP FROM 50 LBB TO START 50 LBB BAY5 CB PANEL TRIP FROM 50 LBB TO START 50 LBB BAY6 CB PANEL TRIP FROM 50 LBB TO START 50 LBB +VE BUSBAR PANEL 87 BUSBAR
  • 33. 96 BB (MASTER TRIP RELAY) OPERATION 87 BUSBAR TO D/T-1 +VE -VE RESET OPERATED PB TO CL I/L TO LBB TO TC-1 TO TC-2 TO M1 DR TO M2 DR TO D/T-2 96 BB MASTER TRIP RELAY TO ANNUN TO SER FROM LBB
  • 34. TRANSFORMER TROUBLES TRIPPING GR-A OIL TEMP TRIP BUCHHOLZ TRIP PRD-1 TRIP PRD-2 TRIP DIFF RELAY 87T OL RELAY 51OL HV O/L+E/F PROT 67 86 AX 86 AY TO 3PH GR-A 400KV MAIN TO 3PH GR-A 220KV MAIN NDR RELAY 151N HV O/F RELAY 99T +VE +VE -VE
  • 35. TRANSFORMER TROUBLES TRIPPING GR-B REF RELAY 64REF STUB RELAY 50ST LV O/L+E/F PROT 67 86 BX 86 BY TO 3PH GR-B 400KV MAIN TO 3PH GR-B 220KV MAIN LV O/F RELAY 99T OLTC BUCHHOLZ-R TRIP OLTC BUCHHOLZ-Y TRIP OLTC BUCHHOLZ –B TRIP WNDG TEMP-HV TRIP WNDG TEMP-LV TRIP WNDG TEMP-IV TRIP +VE +VE -VE
  • 36. LBB Operation & Output INITIATION 186 R 186 Y 186 B 286 R 286 Y 286 B 86 GR-A 86 GR-B 96 BB +VE TO D/T CH-1 TO D/T CH-2 TO ANNUN TO MAIN1 DR TO MAIN2 DR TO SER TO 86 GR-A TO 86 GR-B TO BUSBAR -VE 50X LBB / BFR TIMER
  • 37. TRIP COIL-1 CIRCUITS 186R1 186R2 286R1 286R2 86GR-A 86GR-B 96BB 186Y1 186Y2 286Y1 286Y2 186B1 186B2 286B1 286B2 186R1, 186R2, 186Y1, 186Y2, 186B1, 186B2 ARE CB 1-PH TRIP UNIT OF GR-A. THESE ARE SELF RESETING. 286R1, 286R2, 286Y1, 286Y2, 286B1, 286B2 ARE CB 1-PH TRIP UNIT OF GR-B. THESE ARE SELF RESETING. THE BELOW ARE HAND RESETING. 86GR-A, 86GR-B ARE 3-PH TRIP UNITS. 96 BB IS BUSBAR TRIPPING RELAY TRIP COIL-1
  • 38. TRIP COIL-2 CIRCUITS 186R1 186R2 286R1 286R2 86GR-A 86GR-B 96BB 186Y1 186Y2 286Y1 286Y2 186B1 186B2 286B1 286B2 186R1, 186R2, 186Y1, 186Y2, 186B1, 186B2 ARE CB 1-PH TRIP UNIT OF GR-A. THESE ARE SELF RESETING. 286R1, 286R2, 286Y1, 286Y2, 286B1, 286B2 ARE CB 1-PH TRIP UNIT OF GR-B. THESE ARE SELF RESETING. THE BELOW ARE HAND RESETING. 86GR-A, 86GR-B ARE 3-PH TRIP UNITS. 96 BB IS BUSBAR TRIPPING RELAY TRIP COIL-2
  • 39. CB CONTACT MULTIPLICATION S.No R-PHASE Y-PHASE B- PHASE REF PURPOSE A-POLE B-POLE C-POLE 1 A11,A12 B11,B12 C11,C12 2 A13,A14 B13,B14 C13,C14 3 A15,A16 B15,B16 C15,C16 4 A17,A18 B17,B18 C17,C18 5 A19,A20 B19,B20 C19,C20 6 A21,A22 B21,B22 C21,C22 7 A23,A24 B23,B24 C23,C24 8 A25,A26 B25,B26 C25,C26 9 A41,A42 B41,B42 C41,C42 10 A43,A44 B43,B44 C43,C44 11 A45,A46 B45,B46 C45,C46 12 A47,A48 B47,B48 C47,C48 13 A49,A50 B49,B50 C49,C50 14 A51,A52 B51,B52 C51,C52 15 A53,A54 B53,B54 C53,C54 16 A55,A56 B55,B56 C55,C56
  • 40. PROTECTION COUPLER PANEL C E DISPLAY ACTIVE START TRIP NSD 50/ NSD 70 G4AC TB: V9LC 1- 2+ 5- 6+ 9- 10+ 13- 14+ TX TRIP A(C) RX TRIP A(C) TX TRIP B(D) RX TRIP B(D) C S C S C R C R GA4D TB:V9LD 1- 2+ 5- 6+ 9- 10+ 13- 14+ TX TRIP C(A) RX TRIP C(A) TX TRIP D(B) RX TRIP D(B) C S C S C R C R G4AA TB: V9LB ALARM-1 250V DC ALARM-2 250V DC 5 6 7 8
  • 41. PROTECTION COUPLERS FOR 400KV LINE  FOR EACH LINE 2Nos PROTECTION COUPLER PANELS PROVIDED.  FOR EACH LINE 1NO CARRIER SPEECH PANEL PROVIDED.  SO, ONE LINE REQUIRES TOTAL 3 PANELS.  CARRIER SPEECH PANEL PURELY FOR VOICE COMMUNICATION BETWEEN TWO SUBSTATIONS, i.e THE LINE CONNECTED SUBSTATIONS.  THE VOICE COMMUNICATION ARE TWO METHODS PROVIDED.  ONE IS HOTLINE COMMUNICATION/DEDICATED/ LIFT&TALK METHOD.  ANOTHER IS DIAL METHOD.  IN PROTECTION COUPLER PANEL-1 TOTAL 3 CARDS ARE IMPORTANT FOR SENDING & RECEIVING TRIP SIGNALS.  ONE CARD FOR ALARM i.e G4AA. ONE CARD FOR PERMISSIVE/PROTECTION TRIP i.e G4AC & ANOTHER CARD FOR DIRECT TRIPS i.e G4AD.  IN PROTECTION COUPLER-2 PANEL ALSO 3 CARDS ARE PROVIDED SIMILAR TO PROTECTION COUPLER-1 PANEL.  THE PROTECTION COUPLER PANEL DRAWING IS SHOWN IN PREVIOUS MENU.  1SET TX & RX FOR PERMISSIVE/ PROTECTION TRIP(G4AC)  1SET TX & RX FOR BACKUP FOR PERMISSIVE/ PROTECTION IN ANOTHER PANEL(G4AC).  1SET TX & RX FOR DIRECT TRIP CHANNEL-1( G4AD).  1SET TX & RX FOR SPARE UNDER EMERGENCY(G4AD).  THE ABOVE ARRANGEMENT SIMILAR FOR PROTECTION COUPLER PANEL-2.  G4AA CARD FOR ALARM.
  • 42. MAIN-1 PROTECTION CARRIER INTER TRIPPING ABB REL521 CR CS -VE CARRIER RECEIVE CARRIER SEND ALARM IN ABB NSD 50 OUT PANEL-1 PANEL-2 G4AC V9LC 1 G4AC V9LC 2 G4AC V9LC 5 G4AC V9LC 6 G4AA V9LB 5 G4AA V9LB 6 ABB NSD 50 G4AC V9LC 10 G4AC V9LC 14 G4AC V9LC 9 G4AC V9LC 13 THIS IS BACKUP FOR PERMISSIVE/ PROTECTION TRIP AND CONNECTED IN ANOTHER PANEL +VE -VE
  • 43. MAIN-2 PROTECTION CARRIER INTER TRIPPING ABB REL316 CR CS -VE CARRIER RECEIVE CARRIER SEND ALARM IN ABB NSD 50 OUT PANEL-2 PANEL-1 G4AC V9LC 1 G4AC V9LC 2 G4AC V9LC 5 G4AC V9LC 6 G4AA V9LB 5 G4AA V9LB 6 ABB NSD 50 G4AC V9LC 10 G4AC V9LC 14 G4AC V9LC 9 G4AC V9LC 13 THIS IS BACKUP FOR PERMISSIVE/ PROTECTION TRIP AND CONNECTED IN ANOTHER PANEL +VE -VE
  • 44. DIRECT TRIP SEND CARRIER CHANNEL-1 T N C MAIN CB(1-52CB) CONTROL PANEL 87 BUSBAR TRIP (ZONE-1) 50 LBB/BFR ABB NSD 50 DC +VE FROM PANEL G4AD V9LC 2 DC –VE FROM PANEL G4AD V9LC 1 PANEL-1 BUSBAR PROTECTION PANEL RELAY PANEL . OVER VOLTAGE STAGE 1 or 2
  • 45. DIRECT TRIP SEND CARRIER CHANNEL-2 T N C MAIN CB(1-52CB) CONTROL PANEL 87 BUSBAR TRIP (ZONE-1) 50 LBB/BFR ABB NSD 50 DC +VE FROM PANEL G4AD V9LC 2 DC –VE FROM PANEL G4AD V9LC 1 PANEL-2 BUSBAR PROTECTION PANEL RELAY PANEL . OVER VOLTAGE STAGE 1 or 2
  • 46. DIRECT TRIP RECEIVE CHANNEL-1&2 ABB NSD 50 G4AD V9LC 6 G4AD V9LC 5 ABB NSD 50 G4AD V9LC 6 G4AD V9LC 5 PANEL-1 PANEL-2 DC +VE DC +VE +VE -VE TO 86-A MASTER TRIP RELAY (HIGH SPEED TRIP RELAY) TO 86-B MASTER TRIP RELAY (HIGH SPEED TRIP RELAY) DIRECT TRIP-1 CARRIER RECEIVE RELAY DIRECT TRIP-2 CARRIER RECEIVE RELAY TO ANNUNCIATION TO MAIN1 DR TO MAIN2 DR TO ANNUNCIATION TO MAIN1 DR TO MAIN2 DR