| 摘要 |
PURPOSE:To provide a circuit for interrupting high voltage by blowing out a fuse in which a switching element is opened positively after the circuit is interrupted. CONSTITUTION:A power supply battery 4 is connected i series with a load 5, e.g. a running motor, and a fuse 1 and a relay circuit 8 are connected in series between them. The relay circuit 8 comprises a main relay contact 2a, a main relay exciting coil 2b, a subrelay 3a, a subrelay exciting coil 3b, driving transistors 2c, 3c, an OR circuit 2d, and an auxiliary battery 9 for driving relay. A control circuit 6 is driven by the auxiliary battery 9 to control the loads 5 and delivers a signal for feeding power thereto and a current detecting circuit 7a detects load current I thus detecting the operating state. |
