An arc flash inside a manhole set back repairs, according to Hawaiian Electric, and forced HECO to shut off power to about 3,000 customers in Chinatown, parts of downtown and Nu'uanu. Four HECO ...

The generator circuit breaker (GCB) is the key power switchgear for power plants. The rated current and short-circuit current of high-voltage and large-capacity GCBs exceed the capacity limit of a ...