What are the classifications of power distribution boxes?

(1) fixed panel type switchgear, often called switchboard or distribution screen. It is a kind of open switchgear with panel cover, the front has a protective role, the back and side can still touch the charged part, the protection level is low, can only be used in industrial and mining enterprises with low requirements for power supply continuity and reliability, for centralized power supply in the substation room.

(2) protective (i.e. closed) switchgear, refers to the installation surface in addition to all other sides are closed up a low-voltage switchgear. This kind of cabinet switch, protection and monitoring and control of electrical components, are installed in a steel or insulating material made of enclosed enclosure, reliable wall or off-wall installation. Cabinet between each circuit can not add isolation measures, but also grounded metal plate or insulated plate for isolation. Usually the door and the main switch operation has a mechanical interlock. There are also protective table type switchgear (i.e. console), the panel is equipped with control, measurement, signal and other electrical appliances. Protective switchgear is mainly used as a process site power distribution device.

(3) drawer type switchgear. This kind of switchgear cabinet is made of steel plate with enclosed shell, and the electrical components of the incoming and outgoing circuits are installed in the drawer that can be withdrawn, constituting a functional unit that can complete a certain type of power supply task. The functional units are separated from the busbar or cables by grounded metal plates or functional plates made of plastic, forming three areas for busbar, functional units and cables. Each functional unit is also separated from each other by isolation measures. Drawer type switchgear has high reliability, safety and interchangeability, and is a more advanced switchgear. Most of the switchgear produced at present are drawer type switchgear. They are suitable for industrial and mining enterprises requiring high reliability of power supply, high-rise buildings, as a centralized control of power distribution center.

(4) Power and lighting distribution control box. Mostly enclosed vertical installation. Due to the use of different occasions, the shell protection level is also different. They are mainly used as power distribution devices at the production site of industrial and mining enterprises.