Power distribution box, Is a kind of distribution box.Power distribution box is divided into the power distribution box and lighting distribution box, is the distribution system of the last level of equipment.The distribution box is according to the electrical wiring requirements of the switchgear, measuring instruments, protection of electrical and auxiliary Equipment assembled in a closed or semi-enclosed metal cabinet or screen, constitute a low-voltage power distribution devices.

Distribution box is divided into the power distribution box and lighting distribution box, is the final distribution system equipment. Distribution box is according to electrical wiring requirements will switch equipment, measuring instruments, protection Electrical appliances And auxiliary equipment assembled in a closed or semi-enclosed metal cabinet or screen to form a low pressure Power Distribution Unit In normal operation, the circuit can be switched on or off by means of a manual or automatic switch, and the circuit or alarm is cut off by means of a protective device in the event of a malfunction or malfunction, by means of which the various parameters in operation can be displayed, Adjustment, to deviate from the normal working state to prompt or signal.Usually used in the hair, with, Substation in.

press power supply system The requirements of classification:

1) Level distribution equipment, collectively referred to as the power distribution center. They are concentrated in the enterprise's substation, the Electricity Assigned to different locations of the lower power distribution equipment.This level of equipment close to the step-down transformer, so the electrical parameters are higher, the output circuit capacity is also larger.

2The two-stage power distribution equipment, power distribution cabinets and motor control center collectively.Power distribution cabinets used in the more decentralized load, the circuit less occasions; motor control center for the load concentration, the circuit more occasions. The power distribution of a circuit of a power distribution to the nearest load.This level of equipment should provide protection, monitoring and control of the load.

3) Final power distribution equipment, collectively referred to as lighting power Distribution box They are far from the power supply center, yes dispersion Of the small-capacity power distribution equipment.

Classification by structure and use:

1) Fixed panel type Switchgear , Often called switch board or power distribution screen.It is a panel cover open switchgear, the front has a protective effect, the back and side can still touch the live part of the protection level is low, can only be used for power continuity and Reliable requirements of the lower industrial and mining enterprises, for the power supply room for centralized power supply.

2) Protective type (ie, closed) switchgear cabinet, refers to the installation surface, all the other side are closed up a low-voltage switchgear. This cabinet switch, protection and monitoring control and other electrical components, are installed in a Steel or Insulation Materials Can be installed on the wall or away from the wall.Each cabinet can not be isolated between the isolation measures can also be used to ground the metal plate or insulation board isolation.Often the door and the main switch is operating mechanical interlocking . In addition there are protective type Taiwan-type switch cabinet (ie console), the panel is equipped with control, measurement, signal, etc. Electrical appliances Protected switchgear is mainly used as a process site Power Distribution Unit.

3) Drawer type switch Cabinet.The switchgear is made of steel plate, the electrical components of the inlet and outlet circuit are installed in the withdrawable drawer to form a functional unit which can complete a certain kind of power supply task. Bus Or between the cable, with a grounded metal plate or plastic function board separated to form the bus, functional unit and cable three regions. Between each functional unit isolation measures. Drawer switchgear has a high reliability They are suitable for industrial and mining enterprises, high-rise buildings, which require high reliability of power supply, as centralized control of the distribution of electricity, center.

4) Power, lighting, power distribution control box. Mostly closed vertical installation. Because of the use of different occasions, different levels of protection. They are mainly used as industrial and mining production site distribution device.