under-current circuit breaker

... undercritical 亚临界的，次临界的 under-current circuit breaker 欠电流断路器 under-current protection 欠电流保护 ...

什么意思... ... under-current trip 欠电流跳闸 under-current circuit breaker [电] 低电流断路器 ; [电] 欠电流断路器 ...