现在小水电站的剪断销信号装置多采用交流220V电源供电,而交流220V电源一般是来自厂用动力屏,这样就产生了误动作的问题。下面以许昌继电器厂产的ZJX-3型剪断销信号装置(以下简称装置)及其接线为例,说明误动作原因,并提出本人对装置和接线的改进意见。装置的内部及引出接线如图1所示。 At present, the shear pin signal device for small hydropower stations mostly uses AC 220V power supply, while the AC 220V power supply generally comes from the factory power screen, thus resulting in a malfunctioning problem. The following to Xuchang relay factory production ZJX-3 type shear pin signal device (hereinafter referred to as device) and its wiring as an example to explain the reasons for malfunction, and I put forward improvements on the device and wiring. The internal device and leads to the wiring shown in Figure 1.