WGB-683A generator protection device is a microprocessor-based unit designed for small to medium-sized generators. It features abnormal protection, backup protection, non-electrical quantity protection, measurement, and control functions, allowing it to coordinate with the power plant’s automation system for efficient operation.
WGB-683A 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 abnormal protection, back-up protection, non electrical quantity protection, measuring function and control function, can coordinate theautomaticsystemof powerplant to complete the corresponding automation function.
Protective Functions | Abbr | |
1 |
Two stage overcurrent protection with compound voltage blocking (memory) |
OC1, OC2 |
2 | Three stage stator overload protection | SymOL_Alm, SymOL_Trp,
SymInvOL |
3 | Three stage negative sequence overload protection | NegOL_Alm, NegOL_Trp,
InvNegOL |
4 | Overvoltage protection | OV |
5 | Undervoltage protection | UV |
6 |
Stator earth-fault protection (Fundamentatal zero
sequence overcurrent protection) |
ZOC_Fund |
7 |
Stator earth-fault protection (Fundamentatal zero sequence overvoltage protection) |
ZOV_Fund |
8 |
Stator earth-fault protection (Third harmonic voltage ratio protection) |
V3rhH_Rat |
9 | Two stage rotor one-point earth-fault protection | 1PEFH_Rot, 1PEFL_Rot |
10 | Rotor two points earth-fault protection | 2PEF_Rot |
11 | Two stage reverse-power protection | RevP_Alm, RevP_Trp |
12 | Program reverse power protection | RevP_Prog |
13 | Loss of excitation protection | LossExc |
14 | Under-frequency protection | UF |
15 | Over-frequency protection | OF |
16 | Noumenon (non electrical quantity) protection | Noum BI_1~9 |
17 | Voltage transformer supervision | VTS |
18 | Control loop check | Control Loop Chk |
19 | Handcart position check | Handcart Pos Chk |
20 | Circuit breaker open position check | CB Open Pos Chk |
21 | 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 |
Ten channels 4-20mA direct current input |
Six channels is standard configuration, other four channels are optional |
6 | Three channels 4-20mA direct current output | Optional |
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.