| 摘要 |
<p>A multi-socket mains outlet comprises one master outlet 3 and at least one slave outlet 4, where power is only supplied to the slave outlets 4 when an appliance plugged into the master outlet 3 is switched on. The circuit comprises a current sensor 51, which may be a current transformer 511; a driver 52, which amplifies the signal from the current sensor 51; a large current switch component 14, such as a relay; and a circuit 53 for providing low voltage dc power to control the large current switch component 14.</p> |
