| 摘要 |
A resettable circuit interrupting device such as a GFCI (10) that is immune to the problem of reverse wiring and, therefore, has load-line terminals (36, 40) that can be interchangeably connected to either at least one load or to a power source. The device comprises two differential transformers (DT, DT'), one to detect leakage current when the load is connected to the load terminals, and the second coupled to detect leakage current when the load is connected to the line terminals. |
