| 摘要 |
<p>The protection apparatus for air circuit breaker is disclosed, wherein the air circuit breaker is instantly tripped to interrupt the supply of power to the load if a greater level of current is supplied to the load to thereby protect the air circuit breaker and the load against damage, and wherein the current supplied to the load through the air circuit breaker is detected by the voltage detector and converted to a voltage, where the detected voltage is rectified by the rectifier which is compared with the prescribed reference voltage by the comparator to determine whether to trip, and if the tripping is determined by the comparator, the trip coil is driven to trip the air circuit breaker and to prevent the power from being supplied to the load.
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