WGB-634A transformer protection device (Hereinafter referred to as the device) mainly applies to protect large capacity station service transformer, substation service transformer and grounding transformer in small current grounding system or small resistance grounding system of 10kV voltage class and under. It can be directly installed in the high voltage switch cabinet or installed in a screen body.
WGB-634A transformer protection device (Hereinafter referred to as the device) mainly applies to protect large capacity station service transformer, substation service transformer and grounding transformer in small current grounding system or small resistance grounding system of 10kV voltage class and under. It can be directly installed in the high voltage switch cabinet or installed in a screen body.
| Protective Functions | Abbr | |
|
1 |
Percentage differential protection (second harmonics inrush flow identification, CT fuse failure blocking) |
PcntDiff |
| 2 | Instantaneous differential protection | InstDiff |
| 3 | Difference current out-of-limit protection | Diff_OOL |
| 4 | Current transformer supervision | CTS |
|
5 |
Three-stage overcurrent protection with complex voltage blocking |
OC1,OC2,OC3 |
| 6 | Overload protection | OvLd |
| 7 | Inverse-time overcurrent protection | InvOC |
| 8 | Two-stage negative sequence overcurrent protection | NegOC1, NegOC2 |
|
9 |
Three- stage zero sequence overcurrent protection at the
high voltage side |
ZOC1_H, ZOC2_H, ZOC3_H |
|
10 |
Zero sequence overcurrent protection at the low voltage side |
ZOC_L |
|
11 |
Inverse-time zero sequence overcurrent protection at the low voltage side |
InvZOC_L |
| 12 | Undervoltage protection | UV |
| 13 | Zero sequence overvoltage protection | ZeroOV |
|
14 |
Non-electrical quantity protection |
Heavy gas, Light gas, Ultra-H
temp, High temp, Non-E1, Non-E2, Non-E3, Non-E4 |
| 15 | FC loop blocking function | FC-BLK |
| 16 | Voltage transformer supervision function | VTS |
| 17 | Control loop check | Control Loop Chk |
| 18 | Circuit breaker open position check | CB Open Pos Chk |
| 19 | Handcart position check | Handcart Pos Chk |
| 20 | Spring not store energy check | Spring not-E Chk |
| Measure and Control Functions | ||
|
1 |
Remote signaling acquisition, device remote signaling change and fault
remote signaling |
√ |
| 2 | Remote control tripping and closing circuit breaker | √ |
| 3 | Analog telemetering: IA, IB,IC, Ua, Ub, Uc, Uab, Ubc, Uca, P, Q, f, Cosf | √ |
| 4 | Fault wave records | √ |
| 5 | Three channels 4-20mA direct current output |
Optional |
| 6 | Four channels 4-20mA direct current input | |
| Communication Functions | ||
|
1 |
Two-way RS485 communication interface, support IEC-103,MODBUS-RTU communication protocols |
√ |
|
2 |
Two-wayRJ45 Ethernet interface, support TCP-103, IEC-104 communication
protocols |
√ |
| 3 | One-way time synchronization with pulse or B code mode | √ |
| 4 | Support IEC61850 communication protocol | Optional |
Device has universal AC-DC auxiliary power supply; the maximum input voltage is 500V, suitable for all kinds of complicated power supply place;
Device has universal AC-DC operation circuit and binary input circuit power supply, which can apply to AC or DC power supply system.
