Questions and Answers
What is the main purpose of switchgear?
To control and protect electrical circuits and equipment
Why can't a tumbler switch with an ordinary fuse be used profitably on high voltage systems?
It cannot interrupt large fault current successfully
What problem arises when a fuse blows on high voltage systems?
The risk of serious damage to costly equipment
Why are automatic protective devices or switchgears required for high voltage systems?
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What is the key disadvantage of using a tumbler switch with an ordinary fuse on high voltage systems?
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What is the primary function of a circuit breaker in an automatic protective equipment system?
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Why might a circuit breaker be preferable to a fuse in certain instances?
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What happens when heavy current flows through the primary of the current transformer (CT)?
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How is an arc extinguished in a circuit breaker during opening?
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What is the role of the relay in an automatic protective equipment system?
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