The distribution box is assembled in a closed or semi-enclosed metal cabinet or on a screen according to the electrical wiring requirements of switchgear, measuring instruments, protective appliances and auxiliary equipment to form a low-voltage distribution box. During normal operation, the circuit can be turned on or off by means of a manual or automatic switch.
In the event of a fault or abnormal operation, the circuit will be cut off or alarmed with the help of protective appliances. The measuring instrument can display various parameters in operation, and can also adjust some electrical parameters to prompt or signal deviations from normal working conditions.
