局扇电气控制线路的改进

Improvement of electro-controlled circuit of local fan

分析了井下局扇风机烧毁的原因 ,提出了仅改动一根线 ,即可解决井下局扇风机因断相而烧损问题的方法。

The reasons of local fan destroied underground mine are analyzed. And the methods of solving the burning problems caused by breaking phase are provided, which is only changing one circuit.