| 摘要 |
<p>An apparatus for controlling the supply of electrical power to a device or appliance comprises a plug (18L,18E,18N) and one or more sockets (16E,16L,16N) for connection to a mains supply (24) and to one or more appliances, respectively. A current sensor (32) measures electrical current flowing between the first and second connection means and a microcontroller (22) operates a switch (triac,30) to disconnect the or each of the sockets from the plug when the current falls below a predetermined level. The predetermined level may be a percentage of the normal operating current of the appliance.</p> |
