Distribution Box Classification

Commonly used distribution boxes are made of wood and metal. Because the protection level of the metal distribution box is higher, it is still used more by metal.

According to structural characteristics and uses:

(1) Fixed panel-type switchgear, often called switchboard or power distribution screen. It is an open-type switchgear with panel blocking. It has a protective effect on the front, and the live parts can still be touched on the back and sides. The protection level is low. It can only be used in industrial and mining enterprises that have low requirements for power supply continuity and reliability. For centralized power supply in substation.

(2) Protective (ie closed) switchgear refers to a type of low-voltage switchgear that is closed on all sides except the installation surface. The electrical components such as the switch, protection and monitoring control of this cabinet are installed in a closed enclosure made of steel or insulating material, which can be installed reliably or off the wall. No isolation measures can be added between each circuit in the cabinet, or a grounded metal plate or insulation plate can be used for isolation. Usually the door and main switch are mechanically interlocked. In addition, there are protective table-type switchgears (ie consoles), and electrical appliances such as control, measurement and signal are installed on the panel. Protective switchgear is mainly used as a power distribution device at the process site.

(3) Drawer type switch cabinet. This type of switchgear is made of steel plate to make a closed shell. The electrical components of the inlet and outlet circuit are installed in drawers that can be drawn out, forming a functional unit that can complete a certain type of power supply task. The functional unit and the bus bar or cable are separated by a grounded metal plate or a functional board made of plastic to form three areas of the bus bar, functional unit and cable. There are also isolation measures between each functional unit. Drawer-type switchgear has high reliability, safety and interchangeability, and is a relatively advanced switchgear, most of which refer to drawer-type switchgear. They are suitable for industrial and mining enterprises and high-rise buildings that require high power supply reliability, as a centralized control distribution center.

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

Post time: Jun-13-2022