低压系统接地故障火灾预防

Fire Prevention for Grounding Failure of L ow Voltage System

低压系统接地故障电流、接地故障电压、PE和PEN线接线端子连接不实等都会引起电气火灾。为预防建筑物接地故障火灾,应采取保持电气线路和电气设备的规定绝缘水平、对建筑物内电气装置实施总等电位联接、保证PE/PEN线连结良好、在建筑物电源总进线处设置专用于防火的漏电保护器等措施。

Because the causes of grounding failure curr ent,grounding failure voltage and imperfect counection of counecting terminal of PE and PEN line in low voltage system the electrical fire can be caused.For pre venting grounding failure fire of building some measures consisted of rolding ru led insulation level for electrical circuits and electrical equipments,practisin g equal potential connection for electrical device in building,ensuring good con nection of PE/PEN lines,providing special electrical leakage protector at the ge neral current source inlet of building,etc.