交流电零线断线对设备造成的影响与预防

Harm of Disconnection of Alternating Current Neutral Wire to Equipment and Prevention

交流电零线发生断线,会对用电设备造成危害甚至烧毁,作者结合多年的工作经验,对临汾中心地震台电网运行中发生的零线断线对电气设备、人身财产造成的危害进行阐述,分析零线在三相负载不对称低压供电系统中,平衡相电压的重要作用。通过个例,分析单相供电线路和三相四线制线路发生零线断路后,线路电压的分布特点,及零线断线后发生的电器设备无法正常工作及损坏的原因。

Disconnection of alternating current neutral wire vtil cause damage even burn to electrical equipment. The harm caused by disconnection of neutral wire at Linfen central station on electrical equipment and personal property s expounded combined with the author＇s many years of practical experience. The important role of neutral wire n equilibrium phase voltage n three phase load asym-metric low-voltage power supply system s analyzed. Through an example,the paper analyzes the distribution ccuit voltagein single phase power supply circuit and the three-phase four wire circuit when threason why the electrical equipment cannot work after neutral wire disconnection s analyzed.