本文从工程角度出发,通过比较详细的分析和实验检测,探讨了UPS(不间断电源)供电系统中引起市电断路器漏电保护误动作的原因,并着重从电路的组成和参数、UPS启动的工作过程分析了漏电流的产生。最后,提出了相应的解决措施。 This article from the engineering point of view, through more detailed analysis and experimental testing to explore UPS (uninterruptible power supply) power supply system caused by mains breakers leakage protection misoperation reasons, and focus on the circuit composition and parameters, UPS startup Work process analysis of the leakage current. Finally, the corresponding solutions are proposed.