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Protection and Control

    • Six stages phase overcurrent protection (67P, 50/51P)

    • Six stages earth-fault protection (67G, 50/51G)

    • Two stages negative-sequence overcurrent protection (67Q, 50/51Q)

    • Two stages phase undervoltage protection (27P)

    • Two stages phase overvoltage protection (59P)

    • Two stages negative-sequence overvoltage protection (59Q)

    • Two stages residual overvoltage protection (59G)

    • Four stages overfrequency protection (81O)

    • Four stages underfrequency protection (81U)

    • Four stages frequency rate-of-change protection (81R)

    • One stage undercurrent protection (37)

    • Breaker failure protection (50BF)

    • Dead zone protection (50DZ)

    • Pole discrepancy protection (62PD)

    • Auto-reclosing (79)

    • Switchgear control

    • Synchronism Check (25)

    • Voltage selection

    • Voltage and current drift auto adjustment


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