| 摘要 |
Means for controlling the alternating current flowing to and across a load (R), comprising: a connection connecting a polarity of the power supply line to said load, a circuit connected in series with said connection and comprising two branches arranged in parallel to each other, in which an alternating-current control and switching device (3), such as a TRIAC or a SCR, is connected in series in the first branch, and a relay (4) is connected in series in the second branch. In said first circuit branch there is arranged a cutout device (7) that is adapted to cut off the current when the average value of said current in said first branch is greater, in a pre-determined time interval, than a pre-set value. Said current cutout device is a time-delay fuse.
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