Study of IDMT Overcurrent Relay скачать в хорошем качестве

Study of IDMT Overcurrent Relay

IDMT Relay (Inverse Definite Minimum Time Relay) are protection relays. They are used on transmission lines to see to that the line current doesn't exceed safe values and if it does, triggers the circuit breaker. IDMT means inverse definite minimum time. So as the current keeps increases, the relay takes minimum time to trip the circuit. Inverse means "higher the current value, lesser the time taken for the relay to trip the circuit". That is why the relay is referred as inverse definite minimum timeover current relay or simply IDMT relay.