Answer / ajit

it is a protective zone relay it sence the vector
difference between two or more similar quantities.
generally it is current operated .at normal operating time
the sum of Ia+Ib+Ic=0 ,but in abnormal conditation the
resultant current will not zero some current will flow
through trip coil & trip the circuit. most differential
relays are baised current differential current.

HOE WE CAN IMPROOVE BY USE OF CAPACITOR

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