| 摘要 |
PURPOSE:To protect the load and to prevent the burning of an adjusting transformer, by providing a control circuit to control a breaker and an automatic switch which are set to a static automatic voltage controller of direct switching system. CONSTITUTION:A line led from a substation is connected to a load 2 via a breaker 5, a voltage controller 3 having an adjusting transformer with multistage tap and an automatic switch 6 which form a static automatic voltage controller. A control circuit 8 controls the breaker 5 and the switch 6 and then opens the breaker 5 and then the switch 6 when an overcurrent is detected and when a short circuit is detected between the adjusting transformer and the tap. Then the controller 3 is separated from the line to protect the load and to prevent the burning of the adjusting transformer. |
