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Answer Posted / d.lakshmi narayana
IN HT IN CT SECONDARY SOME VOLTAGE GENERATED.THIS IS ACTUAL
CONDITION. IN FAULT CONDITION IT IS INCREASED. ON THT TIME
CURRENT OPERATED COIL IS SOME TIMES IT WAS DAMAGED OR
SUPPOSE U R USING INTEGRATED RELAY SOME TIMES IT WAS DAMASED
THAT'S WHY THE CT SECONDARY IS EARTHED OTHERVICE MORE
VOLTAGE IS COMIG SOME TIMES THE CT OPERATED RELAY WAS
MALFUNCTIONING.
SO CT SECONDARY IS EARTHED
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