The relay with inverse time characteristic will operate within 5 to 10 sec.
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
Answer : The operating time of instantaneous relay is 0.1 sec
Answer : Air blast circuit breakers for 400 kV power system are designed to operate in 50 millisecond.
Answer : Circuit breakers usually operate under transient state of short-circuit current.
Description : 3X3 inverse of matrix short trick
Answer : 3X3 inverse of matrix short trick