Switch Gear An overcurrent relay having current settling of 125% is connected to a supply circuit through a current transformer of 400/5 A. The pick-up current is 3.125 A 12.5 A 6.25 A 25 A 3.125 A 12.5 A 6.25 A 25 A ANSWER DOWNLOAD EXAMIANS APP
Switch Gear To limit short-circuit current in a power system are used reactors H.R. fuses earth wires isolators reactors H.R. fuses earth wires isolators ANSWER DOWNLOAD EXAMIANS APP
Switch Gear If the length of the arc in a circuit breaker increases, its resistance increases None of these decreases remains same increases None of these decreases remains same ANSWER DOWNLOAD EXAMIANS APP
Switch Gear Air blast circuit breakers for 400 kV power system are designed to operate in 0.5 sec 50 milli-second 100 micro-second 0.1 sec 0.5 sec 50 milli-second 100 micro-second 0.1 sec ANSWER DOWNLOAD EXAMIANS APP
Switch Gear Minimum arcing voltage will be least in case of silver tungsten carbon graphite silver tungsten carbon graphite ANSWER DOWNLOAD EXAMIANS APP
Switch Gear In a single bus-bar system there will be complete shut down when fault occurs on neutral line two or more faults occur simultaneously fault occurs with respect to earthing fault occurs on the bus itself fault occurs on neutral line two or more faults occur simultaneously fault occurs with respect to earthing fault occurs on the bus itself ANSWER DOWNLOAD EXAMIANS APP
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