Classification And Characteristics Of Common Electrical Cabinets

I. Scope of application

The basic knowledge of common electrical cabinets, introduces the classification of electrical cabinets, applicable occasions and their respective characteristics. Chinese style

2. Problems to be solved_Reference for electrical designers_

3. Knowledge content (can add graphs and tables)

(1) General requirements for electrical cabinet design: (1) Material: steel plate

Box frame, top cover, back wall and bottom plate: 2.0mm_door: 2.0mm_installation plate: 3.0mm_2. Surface treatment, box frame: dipping primer_

Door, top and back wall: Primer dipped, powder coated, color according to the design requirements of the drawings, weave. Installation plate and bottom plate: galvanized. 3. Appearance:

The surface of the box body is clean and without scratches. The joint of the box frame, side plate, top cover, back wall and door should be tightened and tidy. There are no burrs at the opening and edge. Protection Level: IP55 5. Internal Requirements:

The cabinet is equipped with lighting, door switch and mounting frame. The cabinet door is equipped with information box, clean and free of sundries. Outer frame size: Mark according to drawings. Other requirements:

Side plate, top cover, back wall and door are equipped with grounding poles. Four removable hoisting rings are required at the top. The bottom plate is easy to assemble and disassemble (refer to Weitu),

Installation plate should be easy to disassemble and assemble, and door locks and hinges should be tightened and tidy. Chinese style

(2) Inside the cabinet design of the electric cabinet

1. Electrical cabinet layout should be in accordance with the layout. 2. In the absence of layout, the layout should be based on the type of components and heat dissipation requirements. In typesetting, the principle of horizontal and vertical should be maintained. A kind of

3. Electronic components such as PLC, switching power supply and air switch should be arranged above. Because electronic components should be anti-scrap, waterproof, moisture-proof, dust-proof, ventilation and heat dissipation. There are stickers on PLC to prevent sundries from falling in. They can not be connected during wiring and installation. They can be connected only when the installation is completed and the power is ready to be turned on, so as to facilitate heat dissipation. A kind of

4. Relay, solid state, etc. should be placed in the middle position. If the space is limited, it can also be arranged above or below.

5. Terminal row, power row and so on should be arranged in the lower position. Even if it is out of line, there will be no screw, and the wire head falls into other components. A kind of

6. The distance between the upper and lower parts of each component and the groove should be maintained at more than 20 mm in order to facilitate wiring. 7. Exhaust fans, cam switches, etc. should not conflict with grooves and boards. A kind of

8. The buttons and components installed on the door of the electric cabinet will not affect the opening and closing of the door even if they are operated. There is no conflict with the components in the cabinet. 9. The arrangement of components shall not affect wiring. A kind of

10. Line grooves and guideways should be fixed firmly and parallel. The screw should not be too high to prevent the installation of components. M4 * 6 cross semi-circular head screw is used to install, 3.2 bit drilling, M4 wire tapping. 11. After the grooves and guideways are installed, the bottom plate installation holes shall be opened and the bottom plate cleaned up. A kind of

12. Firmly install the electrical components on the guide rail, and set a suitable distance according to the heat dissipation requirements and interference of the electrical components.