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Digital Protection Relays MV Systems → Transmission Protection Relays → AQ G357 Generator Protection Relay

AQ G357 Generator Protection Relay

AQ G357-AQ G357 Generator Protection Relay

Sipariş No : AQ G357

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.

AQ G357 Generator Protection Relay

Protection Function ANSI     Protection Function ANSI
Generator differential protection - 3IdG> 87G     Definite time overvoltage protection - U >, U >> 59
Three-phase instantaneous overcurrent protection - >>>  50     Definite time undervoltage protection - U 27
Three-phase time overcurrent protection - I>, I>> 51     Residual voltage protection - Uo >, Uo>> 59N
Residual instantaneous overcurrent protection - Io>>> 50N     Overfrequency protection - f >, f >>  81O
Residual instantaneous overcurrent protection - Io>>> 51N     Underfrequency protection - f  81U
Voltage restrained or voltage controlled overcurren - Iv> 51V     Rate of change of frequency protection - df/dt 81R
Directional three-phase overcurrent protection - IDir>,IDir >> 67     Synchrocheck - SYNC 25
Directional residual overcurrent protection - IoDir>,IoDir >> 67N     Reverse power/directional overpower protection 32
Underimpedance protection, Z< 21     Directional underpower protection 32
Inrush detection and blocking - I2h > 68     Fuse failure - VTS 60
Current unbalance protection - Iub > 60     Loss of field - X< 40
Negative sequence overcurrent - I2 46     Overexcitation/volts per hertz, V/Hz 24
Thermal protection - T > 49     Breaker failure protection - CBFP 50BF
 
  • Easy to use multilingual Touch Screen display, Fully coloured MIMIC display
  • 16 freely configurable multi-colour LEDs with user description selectable texts
  • 12 Inputs (16/36 Optional) - 8 Outputs (16/24 Optional)
  • Up to 100 disturbance records and 10 000 events in non-volatile memory
  • Single, dual or redundant IEC 61850 with GOOSE, IEC 101,IEC 103, IEC 104, Modbus, DNP 3.0
  • IED Intercommunication according to IEC 61850/9 (distributed)
  • Less than 20ms trip time

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