Answer / swati saxena

The term is generally used to describe relay (electrical switchgear) characteristics. IDMT relays have such tripping characteristics that, for a particular range of low values of current the tripping time varies inversely with the value of current. But beyond a certain current limit the tripping time becomes constant(definite) and causes tripping in minimum time. Hence the name Inverse/Definite Minimum Time. This type of characteristic is found in Over current Relays.

Answer / pinaki chatterjee

TO PROTECT THE SYSTEM THE TRIPPING ARRANGEMENT IS SUCH IN
THIS CASES THAT WHEN THE FAULT CURRENT WILL INCREASE THEN
THE TIME TAKEN WILL BE IN REVERSE MANNER , MEANS MUCH LESS
THAN BEFORE THAT WILL TAKEN THE TIME, IN SENCE THE NAME
IS INVERSE DEFINITE MINIMUM TIME RELAY.

Answer / najmul

it is inverse define time relay. its working to fault
measurement inversely.fault current increase to operating
time decrease.

Answer / anil

inverse defenet minimum time relay
having inverse characteristics

Answer / anil

it is a over current protection relay

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