Distribution box is a massive parameter in data, which generally constitutes a low-voltage forest according to electrical wiring. It is required to assemble switchgear, measuring instruments, protective appliances and auxiliary equipment in a closed or semi-closed metal cabinet or screen to form a low-voltage distribution box. During normal operation, the circuit can be turned on or off by manual or automatic switch.
The distribution box has the characteristics of small volume, simple installation, special technical performance, fixed position, unique configuration function, no limitation of the site, widespread application, stable and reliable operation, high space utilization rate, less land occupation and environmental protection.
Extended data:
Classification by structural features and uses:
1, fixed panel switchgear, often called switchboard or switchboard. It is an open switch cabinet with a panel cover, which has a protective effect on the front, and the live parts can still be touched on the back and side, so the protection level is low. It can only be used in industrial and mining enterprises with low requirements for continuity and reliability of power supply, and can be used for centralized power supply in distribution rooms.
2. Protective (i.e. enclosed) switchgear refers to low-voltage switchgear with all surfaces closed except the installation surface. The electrical components such as switch, protection, monitoring and control of this cabinet are all installed in a closed shell made of steel or insulating materials, which can be reliably installed on or off the wall.
Each loop in the cabinet can be isolated without isolation measures, or it can be isolated with grounding metal plate or insulating plate. Usually, the door is mechanically interlocked with the main switch operation. In addition, there is a protective desktop switch cabinet (console) with control, measurement, signal and other electrical appliances installed on the panel. Protective switchgear is mainly used as power distribution device in process site.
3. Drawer switch cabinet. This kind of switchgear adopts a closed shell made of steel plate, and all the electrical components of incoming and outgoing circuits are installed in drawable drawers, forming a functional unit that can complete a certain type of power supply task. The functional unit is separated from the bus or cable by grounding metal plate or functional plate made of plastic to form three areas: bus, functional unit and cable.
There are also isolation measures between functional units. Drawer switch cabinet has high reliability, safety and interchangeability, and is a relatively advanced switch cabinet. Most switch cabinets refer to drawer-type switch cabinets. It is suitable for industrial and mining enterprises and high-rise buildings as centralized control distribution centers, which requires high reliability of power supply.
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. It is mainly used as a power distribution device in the production places of industrial and mining enterprises.
References:
Baidu encyclopedia-distribution box