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Protection and Control

    • Current differential protection. (87M)

    • Overcurrent protection. (67P, 50P/51P)

    • Neutral/ground overcurrent protection. (67G, 50/51G)

    • Sensitive earth fault protection. (67SG/51SG)

    • Negative sequence overcurrent protection. (46)

    • Broken conductor detection. (46BC)

    • Breaker failure protection. (50BF)

    • Undercurrent protection. (37)

    • Undervoltage protection and Over voltage protection. (27/59)

    • Zero sequence overvoltage protection. (59G)

    • Negative sequence overvoltage protection. (47)

    • Thermal overload element. (49)

    • RTD temperature protection. (RTD)

    • Under-frequency protection, overfrequency protection and rate-of-change of frequency (81U/O/R)

    • Reverse power protection. (32R)

    • Under power protection. (37P)

    • Power factor protection (Out-of-step protection). (55)

    • Restart inhibit for starts per time interval. (66)

    • Starting-time supervision. (48)
      The motor startup-time supervision function protects against excessive starting time and locked rotor conditions of motors during startup.

    • Remote and local tripping/closing of breaker.
      The breaker tripping/closing can be implemented remotely or locally.

    • Voltage and current drift auto adjustment.

    • Frequency tracking.

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