WGB-682A generator protection device is a microprocessor-based unit designed for small to medium-sized generators. It includes main protection, excitation transformer protection, and generator control functions, enabling coordination with the power plant’s automation system for efficient operation.
WGB-682A generator protection device (Hereinafter referred to as the device) is a microprocessor-based protection device with advanced and complete functions, mainly used for small or medium sized generator. Device is configured with main protection, excitation transformer protection and control function of generator, can coordinate the automatic system of power plant to complete the corresponding automation function.
Protective Functions | Abbr | |
1 | Percentage differential protection | PcntDiff |
2 | Instantaneous differential protection | InstDiff |
3 | Current transformer supervision | CTS |
4 | Difference current out-of-limit protection | Diff_OOL |
5 | Two-stage transverse differential protection | TraDiff1, TraDiff2 |
6 |
Two-stage longitudinal zero sequence overvoltage protection |
ZOV1_Lon, ZOV2_Lon |
7 | Voltage transformer supervision | VTS |
8 |
Three-stage overcurrent protection for excitation transformer |
OC1_Exc, OC2_Exc, OC3_Exc |
9 |
Three ways binary input protection
(Unit fault, excitation fault, high temperature) |
UnitFault, ExcFault, HighTemp |
10 | Three ways non electrical quantity protection | Non-E1, Non-E2, Non-E3 |
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 |
Main features
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.