| 摘要 |
A combination switch and circuit breaker is operative as both a switch and circuit breaker when connecting a load to an auxiliary power supply, but is only operative as a switch when connecting the load to a main power supply. The combination switch and circuit breaker has a switch component for selectively connecting a load center branch circuit to either a main power supply or an auxiliary power supply. During main power interruption, for example, the switch component of the combination switch and circuit breaker may electrically connect a branch circuit of the load center to an auxiliary power supply, with a circuit breaking component providing current overload protection. However, during normal main power operation, the switch component electrically connects the load center branch circuit to main power, with a branch breaker and a main breaker providing current overload protection for the branch circuit.
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