what is the diff. b/w restricted earth fault relay &
standby earthfault relay and where they are used?
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Answer Posted / hari
REF is a kind of protection that is connected to the Star Wnding CT which has a neutral connection.It covers only the protection of restricted regions like windings,breakers & cables.
Wherein SBEF relays are connected to the Star Windings and it detects the Zero sequence current in the neutral CT's.
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