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How Negative Phase Sequence Relay works in case of
Synchronous Motor?

Answer Posted / j.venkatesan

In case of the numeric relay the negative phase sequence
current is calculated bu NPS=Ir+a2Iy+aIb.
Where a is an 120 degree phase shift opeator.
This calculated NPS is used for operation of the relay.

Is This Answer Correct ?    3 Yes 7 No



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