| 摘要 |
The engagement voltage is obtained from a current source (+30), while a control switch (2) is in series with the load (1). There is pulse current circuit (6) for intermittent voltage engagement of the load when the control switch is conductive. The voltage engagement is actuated by a control switch (4), affected by the pulse current circuit and series-connected to first control switch. A detection circuit (3,5) is in series with the load, scanning the current of the load, and fitted for actuating the switch-on of a holding circuit (16) for keeping the second control switch closed, when the detection circuit operates. |
