工地电动机烧毁多因为两相运行,其次是电压低和机械故障。具体分析如下。1.导线连接不良。当闸刀接点螺丝松脱或烧坏时,有人便将导线钩在闸刀上使用。还有的闸刀触头失去弹性,压不紧或刀片歪扭。也有的是因为经常超载操作,接触面被烧坏,接触不 The site motor burns more because of two-phase operation, followed by low voltage and mechanical failure. The specific analysis is as follows. 1. Bad wire connection. When the blade contact screw is loose or burned, someone hooks the wire and uses it on the blade. There are also blade contacts that lose their elasticity, pressure or blade twist. Also, because of frequent overloading operations, the contact surface is burned out, and contact is not possible.