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Main Transformer Protection
    • ŸCurrent differential protection (87T)

    • ŸTransformer restricted earth fault protection (64REF)

    • ŸNegative-sequence Overcurrent protection (50/51Q)

    • Overexcitation protection (24)

    • ŸPhase overcurrent protection (50/51P)

    • ŸPhase overcurrent alarm elements (51PAlm)

    • ŸGround overcurrent protection (50/51G)

    • ŸPhase overvoltage protection (59P)

    • ŸPhase undervoltage protection (27P)

    • ŸResidual overvoltage protection (59G)

    • ŸOverfrequency protection (81O)

    • ŸUnderfrequency protection (81U)

    • Rate-of-frequency-change protection (81R)

    • Thermal overload protection (49)

    • ŸImpedance protection (21)

    • ŸBreaker failure protection (50BF)

    • ŸPole disagreement protection (62PD)

    • ŸBreaker flashover protection (50F)

    • ŸMechanical protection (MR)

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