The relay with inverse time characteristic will operate within 5 to 10 sec.
Last Answer : The inverse definite mean time relays are used for over current and earth fault protection of transformer against internal short-circuits.
Description : The operating time of instantaneous relay is
Last Answer : The operating time of instantaneous relay is 0.1 sec
Description : The relay with inverse time characteristic will operate within (a) 1.5 sec (b) 5 to 10 sec (c) 5 to 20 sec (d) 20 to 30 sec (e) none of the above
Last Answer : (b) 5 to 10 sec
Last Answer : Air blast circuit breakers for 400 kV power system are designed to operate in 50 millisecond.
Last Answer : Circuit breakers usually operate under transient state of short-circuit current.