The distribution box represents the voltage of the bus. There is a door in front of the distribution box. When the door opens, all the equipment in the distribution box is exposed for easy maintenance. The distribution box adopts localization design, the structure is compact, the maintenance is convenient, and the combination of line scheme is flexible. The distribution box is equipped with air circuit breakers and fuses as short circuit protection. Contactors and thermal relays are also equipped. The front door of the box can be equipped with operation buttons and indicators.
(1) such distribution equipment is collectively referred to as the distribution core. They are concentrated in enterprise substations and distribute electricity to low-level distribution equipment in different locations. This level of equipment only depends on the steps, the voltage transformer has higher electrical parameters, and the output circuit capacity is also large.
(2) Secondary distribution equipment is the general name of distribution cabinet and motor control core. The distribution cabinet is suitable for the field station with scattered load and less circuits; in the case of concentrated load and many circuits, the motor control core is adopted. They distribute the electricity of the upper distribution circuit.