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AQ T393 Transformer Protection Relay

AQ T393-AQ T393 Transformer Protection Relay

Sipariş No : AQ T393

AQ T393 is a transformer protection IED for 3-winding transformer applications. It integrates full range of protection functions along with variety of additional functions for control, measurement, monitoring and communications.

AQ T393 Transformer Protection Relay


 
Protection Function ANSI     Protection Function ANSI
Three-phase instantaneous overcurrent protection - >>>  50     Definite time overvoltage protection - U >, U >> 59
Transformer differential protection,3IdT> (3-winding) 87T     Definite time undervoltage protection - U 27
Restricted earth fault protection - REF 87N     Residual voltage protection - Uo >, Uo>> 59N
Three-phase time overcurrent protection - I>, I>> 51     Overfrequency protection - f >, f >>  81O
Residual instantaneous overcurrent protection - Io>>> 50N     Underfrequency protection - f  81U
Residual instantaneous overcurrent protection - Io>>> 51N     Rate of change of frequency protection - df/dt 81R
Inrush detection and blocking - I2h > 68     Fuse failure - VTS 60
Current unbalance protection - Iub > 60/46     Overexcitation protection - 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 (24...168 Optional) - 8 Outputs (16...112 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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