我处综合楼建筑工地一台移动振捣器电机,因其电源线长度不够,工地电工将两段短电线连接延长使用。剥线接头时,三根相线的接头位置没有相互错开,外面虽然分相缠上黑胶布加以绝缘,由于在工地东拉西拖,时间一长,使接头处的绝缘胶布逐渐磨损脱落,于是发生了相间短路故障,烧断的一相 A mobile vibrator motor was built at the construction site of the Complex Building. Because the length of the power cable is not enough, the construction site electrician will extend the use of two short wires. When stripping the joints, the position of the three phase conductors are not staggered. Although the external phase is wrapped with black tape to insulate them, the insulation tape at the joints gradually wears off due to dragging on the construction site for a long time. Phase-to-phase short circuit fault, blown phase