Answer / m.gopinath

Earth fault protection is non-unit protection for earth
faults where as restricted earth fault protection is a unit
protection (ie differential protection of Y connected
alternator/transformer) for earth faults. So we can say the
Restricted earth fault protection is differential
protection of a y connected winding for earth faults only
but not for phase-to-phase faults.

In dc ckt. 24v or 110v, which one is more efficient and why?

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define as synchronous generator

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