| 摘要 |
A two wires a.c switch apparatus, comprising a pair of connecting terminals, a two-way switch assembly in a primary loop connected between the terminal, a control circuit for controlling an operation of the two-way switch assembly in the primary loop and a self-energisation power circuit for providing the power to the control circuit. The self-energisation power circuit includes a rectifier, a regulated power supply circuit and at least a mutual inductor. An additional conductive voltage drop and an additional cut-off current may be greatly reduced by the two wires a.c switch apparatus according to the present invention.
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