| 摘要 |
The present invention relates to a power distribution system and more particularly, to a circuit breaker for shutting off an AC source off from a phase wire and a neutral wire with the ability to detect an arc fault, ground fault and overload. The circuit breaker includes an arc fault circuit interrupter (AFCI), a ground fault circuit interrupter (GFCI), an overload circuit interrupter (OLCI), a display panel, and a trip circuitry. The AFCI, the GFCI and the OLCI are crossed between the phase wire and the neutral wire of an AC electrical power line and detect the arc fault, ground fault and overload respectively. The display panel generates the fault indication signal upon the occurrence of at least one selected from the group consisting of the arc fault, ground fault and overload. The trip circuitry is used for shutting off AC source from the circuit breaker upon the occurrence of at least one selected from the group consisting of the arc fault, ground fault and overload. The circuit breaker is shut in response to an arc fault trip signal, ground fault trip signal and/or an overload trip signal, when the level of at least one selected from the group consisting of the arc fault trip signal, ground fault trip signal and overload trip signal is larger than a specified reference trip level. |
