交流漏电流断路器跳开故障分析与排除

Analyses and Elimination on Break off of AC Leakage Current Breaker

针对部分移动基站的组合电源开通时,出现交流漏电流断路器经常跳开的现象,以DMA14-48/50风冷开关电源模块为例,分析了开关电源的漏电流产生原因,并对其漏电流值进行了计算和测试。交流漏电流断路器经常跳开的主要原因是交流线路传输压降过大,为此提出了解决问题的办法。

When switch on the combined power supply in some mobile stations, AC leakage current breaker breaks off often. The author takes DMA14 - 48/50 fan cooling switching mode rectifier as an example to analyze the cause of the failure and calculate and test the value of leaked current; finds the main cause is due to the over voltage drop on AC wire s transmission and presents the solution.