| 摘要 |
<p>An electrical control arrangement for a low voltage power supply comprises a power source, an output for coupling to an electrical load, a thermal overload cut-out device (4) connected in series between the power source and the output, and a light sensitive transducer (1), wherein the transducer (1) is arranged to actuate a semiconductor switching device (2) coupled to a heating element (3) physically adjacent to the cut-out device (4), whereby under predetermined illumination conditions the switching device (2) is operated so as to cause heating of the cut-out device (4) which interrupts the flow of current between the source and the output.</p> |
