| 摘要 |
The present invention is directed to an electrical wiring protection device that includes a housing assembly having a plurality of line terminals and a plurality of load terminals. A fault detection circuit is coupled to at least one of the plurality of line terminals and configured to generate a fault detection signal in response to detecting at least one fault condition in the electrical distribution system. A circuit interrupter assembly is coupled to the fault detection circuit. The circuit interrupter assembly is configured to couple the plurality of line terminals to the plurality of load terminals to form a conductive electrical path in a reset state, and decouple the plurality of line terminals from the plurality of load terminals in response to a fault detection signal in a tripped state. A voltage transient suppression circuit is connected between the plurality of line terminals, the voltage transient suppression circuit including a movistor differentially coupled relative to the at least one sensor circuit such that one lead of the movistor is coupled to a first line conductor disposed on a line side of the at least one sensor circuit and another lead of the movistor is coupled to a second line conductor disposed on a load side of the at least one sensor circuit. A movistor protection circuit is coupled in series to the movistor, the movistor protection circuit being configured to limit an amount of electrical energy applied to the movistor as a function of at least one electrical parameter.
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