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.