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There are two types of switchboard structures
Published Time:
2025-05-22
Common distribution boxes are available in wood and metal. Metal distribution boxes are more commonly used because of their higher protection level.
Common distribution boxes are available in wood and metal. Metal distribution boxes are more commonly used because of their higher protection level.
Classification by structural features and uses:
(1) Fixed panel switchgear, often called switchboard or distribution panel. It is an open-type switchgear with a panel barrier. The front provides protection, but the back and sides are still accessible to live parts. The protection level is low, and it can only be used in industrial and mining enterprises with low requirements for power supply continuity and reliability, for centralized power supply in substations.
(2) Protective (i.e., enclosed) switchgear refers to a low-voltage switchgear where all sides except the mounting surface are enclosed. The electrical components such as switches, protection, and monitoring control are installed in an enclosed shell made of steel or insulating material, mounted on or away from the wall. Isolation measures between circuits within the cabinet may or may not be used; grounded metal plates or insulating plates can be used for isolation. Usually, the door has a mechanical interlock with the main switch operation. There are also protective table-type switchgears (i.e., consoles) with control, measurement, and signal devices on the panel. Protective switchgears are mainly used as distribution devices in process sites.
(3) Drawer-type switchgear. This type of switchgear uses a steel plate enclosed shell. The electrical components of the input and output circuits are installed in removable drawers, forming functional units that can complete a certain type of power supply task. The functional units are separated from the busbars or cables by grounded metal plates or plastic functional plates, forming three areas: busbars, functional units, and cables. There are also isolation measures between each functional unit. Drawer-type switchgear has high reliability, safety, and interchangeability. It is a more advanced type of switchgear; switchgear mostly refers to drawer-type switchgear. They are suitable for industrial and mining enterprises and high-rise buildings with high power supply reliability requirements, serving as centralized control distribution centers.
(4) Power and lighting distribution control boxes. Mostly enclosed and vertically mounted. The enclosure protection level varies depending on the application. They are mainly used as distribution devices in industrial and mining enterprise production sites.
Distribution box structures are divided into two types:
1. Welding structure: Simply cutting, bending, and drilling sheet metal parts, then welding them together.
2. Assembly structure: Sheet metal parts are processed separately. After each part is processed, they are assembled, fastened and locked with screws and tees. This results in a beautiful appearance, simple operation, and significant savings in transportation costs.
Distribution boxes, cabinets, panels, screens, and electrical cabinets are complete sets of equipment for centralized installation of switches and instruments.
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