| 摘要 |
PURPOSE:To detect overload early and minimize a damage in rapid response, by a method wherein means or detecting voltage drop due to overload and interrupting input is provided to a secondary winding of a transformer. CONSTITUTION:A transformer 12 and a plurality of rectifiers 13 to rectify output of secondary windings 12b, 12c of the transformer 12 are installed. Voltage drop of the secondary winding 12b due to overload is detected by a voltage detector 14, and an input interruptor 15 is operated to interrupt an input power source 11. |
