High and low voltage power distribution cabinet as used for electricity distribution, control, measurement and distribution equipment cable is connected in the power supply system, power supply bureau, general substation are used in high voltage switch cabinet, and the low voltage side of transformer step-down leads to low voltage power distribution cabinet, low voltage distribution cabinet in each switchboard, electricity the control box, switch box, which is the number of switches, circuit breakers, fuses, buttons, lights, instrumentation, such as wire protection devices are assembled to distribution equipment design functional requirements of the equipment