关于三相电路中单相负载应用的故障分析

About the Failure Analysis of Single-phase Load Applications in Three-phase Circuit

某厂天棚照明的220V电源是从三相电路的其中一相火线和零线直接获取的,而没有经过相应的变压器,这样的供电使用方式简单有效,不但能够满足220V电源的供应,还能够减少变压器等设备添加,节省了供电开支。然而这种供电方式下中线(或地线)公共端的故障断开,会引起设备供电电压的变化从而有可能引起大面积的设备烧损,鉴于这种供电方式的特殊性和故障引起后果的严重性,本文主要对这种供电方式的原理加以分析,论述该故障能够引起重大后果的原因以及解决办法。

A factory of ceiling lighting 220v power supply is direct access from one of the three-phase circuit and neutral lines, without going through the transformer. This kind of power supply is simple and effective, not only to meet the 220V power supply, but also to reduce the transformers, and saves power supply expenses. However, this power supply failure will not only cause large-area power outages, sometimes cause the damage of large areas of equipment, in view of the special power supply and the failure will cause serious consequences, this paper analyses the principle of the power supply, discusses the failure can cause significant consequences and solutions.