Function of high voltage load switch: It can switch on and off the load current under normal working state and can replace the cicuit breaker when it is used together with high voltage fuse, as a electrical appliances combining indoor high voltage load switch and fuse. Model Representation Observed from the isolating switch, the high voltage load switch is similar to the isolating switch, it has obvious contact breakpoints. The single set has simple arc extinguishing device, which can remove a certain load current. The fuse type can be divided into indoor and outdoor type.