三相四线制中性线的作用及断线保护

The Function of the Neutral Wire and its Protection When Broken

在三相四线制供电系统中 ,中性线是非常重要的 .若发生中性线断线 ,在负荷不对称的情况下将使三相负荷端电压不正常 ,负荷不能正常工作 ,严重时将损坏用电设备 .

In the Three phase and Four wire circuit system,the neutral wire is very important.When neutral wire is broken,in the case of unbalanced load,the voltage of the Three phase load terminal will is not normal.So the load can not regularly work and even the device will be damaged when it is serious.So it is main discussed in this article about the function of the neutral wire and the protection when it breaks.