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Power distribution box has the characteristics of small volume, simple installation, special technical performance, fixed location, unique configuration function, no site restriction, common application, stable and reliable operation, high space utilization, small land occupation, and environmental protection effect. It is the control center for commanding various components in the power supply line to reasonably distribute electric energy. It is the control link for reliably receiving the upper power supply and correctly feeding out the load electric energy. It is also the key to obtaining the user’s satisfaction with the power supply quality. Improving the operational reliability of the power distribution box is the goal of creating a high-quality project.

distribution box types:

(1)distribution board,It is an open switch cabinet with panel blocking. The front has a protective effect, and the back and side can still touch the live parts. The protection level is low. It can only be used for centralized power supply in the substation in industrial and mining enterprises with low requirements for power supply continuity and reliability. distribution board components usually include fuse, circuit breakers, and residual current devices.

(2)Protective (or closed)cable distribution box,It refers to low-voltage switchgear with all sides closed except the mounting surface. The switch, protection, monitoring and control, and other electrical components of the cabinet are installed in a closed shell made of steel or insulating materials, which can be reliably installed on or off the wall. No isolation measures can be taken between each circuit in the cabinet, or a grounded metal plate or insulating plate can be used for isolation. Generally, the door is mechanically interlocked with the main switch. In addition, there is a protective platform type switch cabinet (i.e. console), which is equipped with control, measurement, signal, and other electrical appliances. The protective switch cabinet is mainly used as the power distribution device on the process site.

(3)Drawer type distribution power box. This kind of switch cabinet is made of closed-shell made of steel plate, and the electrical components of the incoming and outgoing circuit are installed in withdrawable drawers to form a functional unit that can complete a certain type of power supply task. The functional unit is separated from the bus or cable by a grounded metal plate or a functional plate made of plastic to form three areas of the bus, the functional unit, and cable. Isolation measures are also taken between each functional unit. Drawer-type switchgear has high reliability, safety, and interchangeability. It is relatively advanced switchgear. Most of the switchgear refers to drawer-type switchgear. They are suitable for industrial and mining enterprises and high-rise buildings that require high power supply reliability as centralized control distribution centers.

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

 

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