Answer / nikitha

Used in transmission lines;
near alternators and substations- non directional
else - directional

Answer / sheikh

Different kinds of over current relay are available.
on HT side over current relay is a part of protective relays.
and LT side over current relay are using in motor starter,
ACB. There are 2 type of over current relays used in motor
circuit one is thermal over load relay second one is EOCR
electronic over current relay etc.

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