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我厂八车间职工在节约用电的运动中,制作了一台结构简单的自动节电装置,经一年来的运行实践证明,工作可靠,故障极少,维护容易,节电效果显著。动作简介当电焊机接入网路而未开始焊接(即空载)时(见右图),接触器 CJ 不吸气,因此,电焊机 PT 初级是通过 CJ_3常闭触头与电容器C 串联接入电源,这时仅产生0.1～0.2安左右的初级电流。同时,PT 次级感应出24伏左右的电压,使直流继电器1J 吸合,从而切断了交流接触器 CJ 线圈回路,保证 CJ 在空载下始终不闭合,也就是使电容器 C 始终串入电焊机初级回路,减少了空载电流。
I plant eight workshop workers in the movement to save electricity, produced a simple structure of the automatic power-saving device, the operation of the past year proved that reliable, faultless, easy to maintain, energy-saving effect is remarkable. Action Introduction When the welding machine into the network without starting welding (ie, no load) (see right), the contactor CJ does not inhale, therefore, welding PT primary through the CJ_3 normally closed contact with the capacitor C series connection Into the power supply, then only produce about 0.1 ~ 0.2A primary current. At the same time, PT secondary induction of about 24 volts, DC relay 1J pull together, thus cutting off the AC contactor CJ coil loop to ensure that CJ does not always open under no load, which is always the capacitor C string into the welding machine The primary circuit reduces the no-load current.