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Thermal overload relays are used to protect the motor against overcurrent due to heavy loads.

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Answer : The inverse definite mean time relays are used for over current and earth fault protection of transformer against internal short-circuits.

Description : IDMT relays are used to protect the transformer against :  (A) Internal short -circuits (B) Open circuits (C) External short circuits (D) Oil leakage

Answer : IDMT relays are used to protect the transformer against : External short circuits

Answer : To protect most of the electrical equipment handling low power, the types of relays used are thermocouple, electronic and bimetallic.

Answer : A thermal protection switch can protect against overload.

Answer : Overload relays are of induction, solid state, thermal, electromagnetic type.

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