Switch Gear
If the fault occurs near the impedance relay, the V/ I ratio will be

None of these
constant for all distances
higher than that of if fault occurs away from the relay
Lower than that of if fault occurs away from the relay

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Switch Gear
An isolator is installed

always independent of the position of circuit breaker
as a substitute for circuit breaker
generally on both sides of a circuit breaker
to operate the relay of circuit breaker

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