AQ-G357 Generator protection IED

AQ-G357 is a generator protection IED for any size of synchronized machines. It integrates a full range of generator protection functions along with variety of additional functions for control, measurement, monitoring and communications.

Highlights
• Generator/motor differential
• Under impedance protection with an offset circular characteristic or as a loss-of-field protection
• Under/overexcitation protection

  • Generator differential, 2 slopes characteristic
  • Loss of field protection
  • Underimpedance protection
  • Overexcitation protection (option)
  • Voltage controlled/restrained overcurrent protection
  • Reverse/under/overpower protection, 2 stages
  • Directional threephase overcurrent, 2 stages INST, DT or IDMT
  • Directional residual overcurrent, 2 stages INST, DT or IDMT
  • Threephase overcurrent,3 stages INST, DT or IDMT
  • Residual overcurrent, 3 stages INST, DT or IDMT
  • Current unbalance, 1 stage
  • Overvoltage, 2 stages INST, DT
  • Undervoltage, 2 stages INST, DT
  • Residual voltage, 2 stages INST, DT
  • stator earth fault protection, 1 stage
  • Under/over frequency, 4 stages DT
  • Rate of change of frequency, 1 stage DT
  • Thermal overload protection
  • Breaker failure protection
  • Inrush detection and blocking
  • Synchrocheck
  • Voltage transformer supervision function
  • CT supervision
  • Distributed busbar protection subunit (option)
  • Current (I1, I2, I3, Io)
  • Voltage (U1, U2, U3, U12, U23, U31, Uo) and frequency
  • Power (P, Q, S, pf) and Energy (E+, E, Eq+, Eq)
  • Trip circuit supervision, 4
  • Dead line detection function
  • Circuit breaker wear protection
  • Control functions
  • Bay control unit, 6 objects
  • Status monitoring switching devices, 2 objects
  • Event recording
  • Non-volatile disturbance records: 100
  • Non-volatile event records: 10000
  • Event recording
  • Non-volatile disturbance records: 100
  • Non-volatile event records: 10000
  • Current inputs: 8
  • Voltage inputs: 4
  • Digital inputs: 12 (Up to 120)
  • Digital outputs: 8 (Up to 40)
  • Fast trip outputs: 4
  • RJ 45 Ethernet 100Mb (front standard)
  • RJ 45 Ethernet 100Mb (rear standard)
  • RS422/RS485/RS232 interfaces (option)
  • Plastic or glass fiber interfaces (option)
  • Communication protocols
  • IEC 61850
  • IEC 608705101,103,104
  • Modbus RTU and Modbus TCP/IP
  • DNP 3.0 and DNP 3.0 over TCP/IP
  • SPAbus