Question
Which of the following are mechanical devices designed to close or open contact members, thus closing or opening an electrical circuit under normal or abnormal conditions?
The correct answer is
Circuit breakers
Circuit breakers are the key devices that fit the description. Thus, circuit breakers are mechanical devices that use contact members to close or open an electrical circuit under both normal switching operations and abnormal (fault) conditions.
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Important Questions from Circuit Breakers
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- For below 400 KV systems, the circuit breaker is designed to withstand ______above the normal system voltage.
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