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  1. X2K3

    GTG - Overfrequency protection

    RRaghunath, Indeed we need over frequecy protection primarily for prime mover protection. However as edison has told, this will also have role while synchronising at higher frequencies. This I have ssen particularly in eastern grids in India. The desicion to trip which CB is debatable. If...
  2. X2K3

    PT Fuse Failure

    Sngpl, What I meant by open delta configuration - PTs with two windid only on HV and LV. HV side both wdgs connected in series - voltages are applied at one phase at each end of wdg (A&C) at middle pt third phase (B). Secondary too is connected in similar way but middle point is grounded...
  3. X2K3

    PT Fuse Failure

    Sngpl, PT connected in open delta should have one[middle] phase grounded. Was the ground connection intact?
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