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300+ TOP Switchgear & Protection Objective Questions Answers contacts of high voltage switches used in power system are submerged in oil. The main purpose of the oil is to (a) lubricate the contacts ... To protect most of the electrical equipment handling low power, the types of relays used are (a) thermocouple (b) electronic and bimetallic ... A switchgear is device used for (a) interrupting an ...

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