Question

ULIUS 1. Explain how a fuse saving scheme is performed using a reciose. ii. What is a sectionalizer and how does it work is a sectionalizer and how does it work in coordination with a recloser? 111. Explain the effect of the magnetizing inrush current on transformer IV. Explain how transformer core faults, inter-turn faults and oil leaks be detected. V. Show the wiring diagram of a differential relay to protect a Wye- grounded I Delta three- phase power transformer in which the Wye is the high-voltage side and the Delta is the low- voltage side, and that the CTs on the Wye side have to be connected as Wye and the CTs of the Delta side have to be connected as Delta. vi. Show the wiring diagram of a zero-sequence ground differential protection for the Wye- grounded side of a Delta / Wye- grounded power transformer and explain its operation.

please answer all questions from i to vi.

Answer 1

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