公开(公告)号：US3903457A

公开(公告)日：1975-09-02

申请号：US40881873

申请日：1973-10-23

Applicant: ASEA AB

Inventor： STRANNE GUNNAR

IPC: H02H1/04 ,  H02H9/04

CPC classification number: H02H1/04

Abstract: In order to prevent unwanted tripping of a direct current apparatus, such as a relay, when it is switched in to a direct current network or in the case of an earth fault, a safety circuit is connected in parallel with the apparatus which includes a capacitor which is so large in relation to the other capacitances in the switched-in circuit that the voltage which is taken up by the capacitor in the switching operation is less than the tripping value of the apparatus. A diode is provided in a connection of the safety circuit to the apparatus to prevent the fall of the relay from being caused by the capacitor.

Abstract translation: 为了防止诸如继电器之类的直流设备在被切换到直流网络时或在接地故障的情况下的不期望的跳闸，安全电路与包括电容器 其相对于接通电路中的其他电容量如此大，使得在开关操作中由电容器占据的电压小于设备的跳闸值。 在安全电路与设备的连接中提供二极管，以防止继电器由电容器引起的下降。