The arcing contacts in a circuit breaker are made of______________?

Related Mcqs:

Magnetic circuit breaker has ___________ trip action

A. delayed B. instantaneous C. both of the above D. none of the above...

Large internal faults are protected by_______________?

A. merz price percentage differential protection B. mho and ohm relays C. horn gaps and temperature relays D. earth fault and positive sequence relays...

Interruption of large currents by relay requires______________?

A. arc suppressing blow out coils B. wide separation of the opened contacts C. high speed opening of contacts D. all of the above...

A _________ is used to measure the stator % winding temperature of the generator?

A. thermocouple B. pyrometer C. resistance thermometer D. thermometer...

An isolator is installed_____________?

A. to operate the relay of circuit breaker B. as a substitute for circuit breaker C. always independent of the position of circuit breaker D. generally on both sides of a circuit breaker...