AC Power Switched Electrical Distribution Switchgear

Product description

GGD type AC low-voltage power distribution cabinet switchgear is suitable for power users such as power plants,
substations, industrial and mining enterprises as power, lighting and power distribution equipment in power
distribution systems with AC 50Hz, rated working voltage 380V, and rated current up to 31 50A For the conversion,
distribution and control of electrical energy. The product has high breaking capacity, rated short-time withstand
current up to 50KA. The line scheme is flexible, easy to combine, strong practicability, novel structure, etc. This
product is one of the representative products of my country’s assembled and fixed panel switchgear. This product
complies with GB7251.12 “Low-Voltage Switchgear and Control Equipment”, IEC60439 “Low-Voltage Switchgear
and Control Equipment” and other standards.

Normal use environmental conditions

1. Ambient temperature: -5°C~+40°C; the average temperature within 24h is not higher than +35°C;
2. Altitude: no more than 2000m;
3. Relative humidity: no more than 50% when the highest temperature is +40C, and a higher relative humidity is allowed at a lower temperature;
(For example, 90% at +20°C) It should be taken into account that the influence of condensation may occasionally occur due to temperature changes;
4. When the equipment is installed, the inclination of the vertical plane does not exceed 5 degrees;
5. The equipment should be installed in a place without severe vibration and impact, and in a place where the electrical components are not corroded

Main technical parameters

1. Main technical parameters (see Table 1)
2. Auxiliary circuit scheme
The design of the auxiliary circuit is divided into two parts: the power supply plan and the power plant plan.
3. Main bus
Single copper busbar is used when the rated current is 1500A and below. When the rated current is greater than 1500A, double copper
busbars are used. The overlapping surfaces of the busbars are all treated with tin enamelling process.
1) Selection of horizontal bus (see Table 2)
2) Selecton of neutral grounding bus (see Table 3)
4. Selection of electrical components
1) The GGD cabinet mainly uses electrical components that can be mass-produced in China. Such as DW17, DZ20, DW15, etc., cabinet
circuit breakers can also be used (DW45), CW1, AE, M,
F, etc., molded case circuit breakers use more advanced electrical components at home and abroad, such as CM1 and TM30.
2) HD1 3BX and HS13BX type rotary operation knife switch is a special component designed to meet the needs of the unique structure of
the MGGD cabinet. It changes the operation mode of the mechanism and retains
In addition to the advantages of the old product, it is a practical new type of electrical component.
3) If the design department selects new electrical components with better performance and more advanced technology according to user
needs, because the GGD cabinet has good installation flexibility, it will generally not cause manufacturing and installation difficulties due to
updated electrical components.
4) In order to further improve the dynamic stability of the circuit, the bus support of the MGGD cabinet adopts a dedicated ZMJ type
combined bus clamp and insulating support. The busbar clamp is made of high-strength, high-flame retardant type
PPO composite material is thermoformed, with high insulation strength, good self-extinguishing performance, and unique structure. It can
be easily combined into a single busbar or double busbar clamp by adjusting the building block. The insulating support is a simple molded
structure with low cost and high strength, which solves the defect of insufficient creepage distance of old products.

Table 1

Structural features

1. The cabinet of the GGD AC low-voltage power distribution switchgear is in the form of a general cabinet. The frame is partially welded with 8MF cold-formed steel. The frame parts and special supporting parts are produced and supplied by our company to ensure the accuracy of the cabinet. And quality. The parts of the general cabinet are designed according to the principle of the module, and there are
installation holes of 20 modules, and the general coefficient is high. Can make the factory realize pre-production. It not only shortens the production cycle, but also improves work efficiency.
2. The GGD cabinet is designed with full consideration of the heat dissipation problem during the operation of the cabinet. There are different numbers of heat dissipation slots on the upper and lower ends of the cabinet. When the electrical components in the cabinet heat up, the heat rises and is discharged through the upper slot, while the cold air is constantly replenished into the cabinet from the lower slot, so that the sealed cabinet is automatically A natural ventilation duct is formed from bottom to top to achieve the purpose of heat dissipation.
3. According to the requirements of modern industrial product design, the GGD cabinet adopts the golden ratio method to design the appearance of the cabinet and the division size of each part, so that the whole cabinet is beautiful and generous.
4. The cabinet door is connected to the frame with a hinge type movable hinge, which is convenient for installation and disassembly. The folding edge of the door is embedded with a fixed compression stroke, which can prevent the door from directly colliding with the cabinet body, and also improve the protection level of the door.
5. The instrument door equipped with electrical components is connected to the frame with multiple strands of soft copper wire. The installation parts in the cabinet and the frame are connected with knurled washers, and the whole cabinet constitutes a complete grounding protection system.
6. The surface of the cabinet is treated with high-voltage electrostatic spray powder process. It has strong adhesion and good texture. The whole cabinet is in matte tones, avoiding the glare effect and creating a more comfortable visual environment for the staff on duty.
7. The top cover of the cabinet can be removed when needed to facilitate the assembly and adjustment of the main busbar on site. The four corners of the cabinet top are equipped with lifting rings for lifting and shipping.
8. The protection level of the cabinet is IP30, and users can also choose between IP20~IP40 according to the requirements of the use environment.