During operation. in order to prevent electric currtric current on the electrified parts from passing through lifted workpiece to the crane and causing danger to the operator, several insulation devices are set up at proper positions of the crane.

• 大车运行机构、小车、电气设备四部分构成、为了防止在工作过程中带电设备上的电流可能通过被吊运的构件传到起重机上，危及司机的生命安全故在起重机的适当部位设置了几道绝缘装置。