Perbezaan IDMT, DT dan Instantaneous Relay

Ada 3 jenis relay berdasarkan time characteristics yang biasa digunakan iaitu ;

    i) Inverse Definite Mean Time IDMT

    ii) Definite Time DT

    iii) Instantaneous Time

Description	IDMT	DT	Instantaneous
Definition	Inverse Definite Mean Time	Definite Time Over Current Relays	Instantaneous Over current
Operating time	Depending on the magnitude of fault current	Operating time constant, irrespective of the fault current	Relay operates at zero time
Sensitivity	High	Low	High
Cost	Very high	low	High
Co-ordination	Require and it should be coordinated with other Definite time relays	Require with other Definite Time upstream relays	Not Require

 rujukan

1. https://www.electrical4u.net/difference/difference-between-idmt-dt-and-instantaneous-relays/