power circuit breaker

例句：

1. 1. The power circuitbreaker is responsible for protecting the electricalsystem from overloads.
   电源断路器负责保护电气系统免受过载。
2. 2. The power circuitbreaker was designed to prevent electrical fires in homes.
   电源断路器被设计用来防止家庭中的电气火灾。
3. 3. The powercircuit breaker was usedto switch off the power duringmaintenance work.
   在维护工作期间，使用电源断路器来切断电源。