Distribution boxes are based on electrical wiring switch equipment, measuring instruments, protection of electrical and auxiliary equipment Assembly in closed or semi-closed metal cabinets or on the screen image, constitute a low-voltage power distribution unit. Normal operation can be realized by using manual or automatic switching on or off road. Protection fault or abnormal operation with electrical cut off the circuit or the police. By measuring instruments can display various parameters for running, electrical parameter can also be adjusted to prompts signals or deviations from normal working conditions. Commonly used for each license, distribution, substations.