A.C.three-phase three-wire insulated system

例句：

1. 1. The new power plant is designed to operate efficiently with a three-phase system.
   这个新的发电厂设计成可以高效地运行在一个三相系统中。
2. 2. The transformer is capable of handling three-phase currents.
   变压器能够处理三相电流。
3. 3. The circuit breaker is designed for use in three-phase systems.
   断路器是为三相系统设计的。