母线槽短路原因和故障的处理方法
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外闻 2019-03-25 17:21:19 字数:642

母线槽短路原因:


1.母线槽在生产的时候使用价格低廉质量不过关的绝缘材料,切绝缘材料有针孔、厚薄不均匀,就会导致母线槽在使用中出现故障。


2.母线槽的铜排含有杂质,且有有凸痕、毛刺、焊接错口等就会导致母线槽的投入运行一段时间后毛刺顶破绝缘层,这就会导致母线槽短路的发生。


3.耐火母线槽应有喷水功能。若耐火母线槽无喷水功能,母线槽在消防喷水或在其他遇到水的情况下会导致母线槽短路。


4.在安装母线槽时有垃圾进入母线槽的壳体中,当这些垃圾在受潮时就会造成母线槽短路。


5.线槽运行中,大多数短路是因为负载造成电气设备的短路而引起的。电动机短路是经常发生的,虽然安装了电动机保护器,一旦电动机发生短路,电动机保护器就会切断电动机的电源。即电动机保护器切断电源前,线槽就受到了短路的冲击,电动机的功率越大,发生短路故障时对线槽的冲击也越大。


母线槽故障的处理方法:


1.双母接线的母线发生故障,在处理故障过程中要注意母线保护的运行方式,必要时应短时停运母线保护。

2.母线电压全部消失后,调度员应立即将可能来电的开关(包括母联开关)拉开,并通知操作队对母线进行外部检查。

3.当母线槽因故障导致电压消失同时有明显的短路象征,比如火光、冒烟这些情况,操作队人员不得自行恢复运行,应对母线设备进行详细检查。

4.连接在母线上的元件故障或由于分路开关拒动,造成越级掉闸使母线失去电压,应进行详细检查,立即将母线槽故障元件隔离或拉开故障分路开关两侧刀闸后,迅速恢复母线运行,送出其他分路。


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