How does a VOLTAGE OPERATED DIFFERENTIAL RELAY work??
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Answer Posted / akhilesh
suppose pri side of pt(3 no's) is connected to any 3 phase
winding n sec of pt is open delta or connected to relay. in
balance cond Vr+Vy+Vb=0 n under unbalance cond not equal to
zero.so that some current fkow through sec of pt n relay
operates
that is ans
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