Combined Over Current & Earth Fault Relay

  • True RMS Measurement with SPARC and DCOI Algorithm
  • Auto / Manual Scroll for Real Time Display of Phase Current and Earth Fault in (%)
  • 6 Selectable IDMT Graphs + DTL
  • Fault / lo-set & hi-set Trip LED Indication
  • Fault Start Event Recording & LED Indication + Output
  • Pre-Alarm LED Indication + Output
  • Trip Event Memory (non-volatile 7 previous records for 3 phases + earth)
  • Fault Start Event Memory (non-volatile 4 previous records with phase info)
  • Selectable Frequency (50/60 Hz)
  • Programmable Relay Output Contact for K2, K3, K4
  • Last Trip Elapsed Time (up to 99days)
  • Software Lock to Prevent Unauthorized Setting
  • Accessible only with A-03s (plug-in module):
    -Programmable Digital Input
    -Dual Setting Parameters (activated by digital input function)
    -Remote Reset Function (activated by digital input function)
  • Complies with: IEC-60255-26/27; BS EN 50121-5 Standards
  • ANSI Code: 50P, 50G, 51P, 51G
  • External Plug-in Module (items sold separately)
    A-01s / A-01sp: RS-485 MODBUS RTU (isolated type)
    A-02s: RS-485 MODBUS RTU (isolated type)
    +1 output contact (K3)
    A-02sd: RS-485 MODBUS RTU (isolated type)
    +1 digital output (K3) (optically isolated)
    A-03s: RS-485 MODBUS RTU (isolated type)
    +2 output contact (K3 & K4), +1 digital input (optically isolated)
Front Panel

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