桥式起重机的供电,一般采用角钢导电的方法,由于带电的角钢裸露在外,容易发生事故。角钢经一段时间后,因灰尘和空气中的氧化物使角钢生锈,造成接触不好,发生打火现象。同时,在高空对带电的角钢进行检查维修 Bridge crane power supply, the general use of angle conductive method, due to live exposed angle, prone to accidents. Angle after a period of time, due to dust and air oxides in the angle rust, resulting in poor contact, the phenomenon of ignition. At the same time, at high altitude on the charged angle inspection and maintenance