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China GGD Low Voltage Fixed Switchgear Suppliers - High-Quality Distribution Cabinets for Factories
Model and Definitions
Application Conditions
- The ambient air temperature is not higher than +40℃ and not lower than -5℃, 24h The average temperature inside shall not be higher than +35℃;
- For indoor installation, the altitude of the location where it is used shall not exceed 2000m;
- The relative humidity of the surrounding air should not exceed 50% when the maximum temperature is +40℃. A higher relative humidity should be allowed at lower temperatures (e.g. 90% at +20℃) to take into account the possible condensation caused by temperature changes.
- The equipment should be installed with an inclination of no more than 5° from the vertical plane;
- The equipment should be installed in a place without severe vibration and impact and in a place where the electrical components are not easily corroded;
- If users have special requirements, they can negotiate with the manufacturer to resolve them.
Electrical performance
Basic electrical parameters
| Model | Nominal Voltage(V) | Rated Currency(A) | Rated short circuit breaking Current (kA) | Rated short-time withstand current (1s) (kA) | Rated peak withstand current (kA) | |
|---|---|---|---|---|---|---|
| GGD1 | 380 | A | 1000 | 15 | 15 | 30 |
| B | 600(630) | |||||
| C | 400 | |||||
| GGD2 | 380 | A | 1500(1600) | 30 | 30 | 63 |
| B | 1000 | |||||
| C | 600 | |||||
| GGD3 | 380 | A | 3150 | 50 | 50 | 105 |
| B | 2500 | |||||
| C | 2000 | |||||
Main circuit scheme
The main circuit of the GGD cabinet has 129 design schemes and a total of 298 specifications (excluding schemes and specifications derived from functional changes in auxiliary circuits and changes in control voltage).
in: GGD1 Type 49 plans 123 specifications GGD2 Type 53 plans 107 specifications GGD3 Type 27 plans 68 specifications.
The main circuit scheme was selected after soliciting opinions from a wide range of design and user departments, and the scheme required by power plants was added. Rated Currency to 3150A, Suitable for 2000kVA And the following In addition, in order to meet the needs of reactive power compensation, a GGJ1, GGJ2 Capacitor compensation cabinet has 4 main circuit schemes and a total of 12 specifications.
Auxiliary circuit solution
The design of auxiliary circuits is divided into two parts: power supply scheme and power plant scheme. GDJ There is enough space in the cabinet to install two Time components, and a special LMZ3D Type Current Transformers are used to meet the needs of power plants and special users for additional relay protection.
Main bus
Considering the price ratio and the feasibility of replacing copper with aluminum, the Rated Currency is 1500A Single aluminum busbar can be used when the rated currency is greater than 1500A Double copper busbars are used to produce. The factory manufactures the prototype according to this regulation and passes the type test. Of course, the manufacturer can also replace the aluminum busbar with a copper busbar with the same current carrying capacity according to the user's requirements. The overlapping surfaces of the busbars are all treated with tinning technology.
Electrical component selection
GDJ The cabinet mainly adopts the most advanced electrical components that can be mass-produced in China. At the same time, according to the principle of economy and rationality, some feasible ones are reserved under the premise of full consideration of feasibility. Use old products such as DZ10D, D220, etc., and do not choose obsolete products.
HD13BX and HS13BX rotary knife switches are special components designed to meet the unique structural requirements of GGD cabinets. They change the operation mode of the mechanism and retain the advantage of the old product is that it is a practical new type of electrical component.
If the design department selects new electrical components with better performance and more advanced technology according to user needs, the GGD cabinet generally will not be replaced due to the good installation flexibility. The device components cause difficulties in manufacturing and installation.
In order to further improve the dynamic stability of the main circuit, a ZMJ type combined busbar clamp and insulation support for GGD cabinets are designed. The busbar clamp is made of high-strength, high-flame-retardant PPO alloy material thermoplastic molding, 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 simply adjusting the building block. The insulation support is a sleeve-type molded structure with low cost and high strength, which solves the defect of insufficient creepage distance of old products.
outside shape and installation dimensions
| Product Code | A | B | C | D |
|---|---|---|---|---|
| GGD06 | 600 | 600 | 450 | 556 |
| GGD06A | 600 | 800 | 450 | 756 |
| GGD08 | 800 | 600 | 650 | 556 |
| GGD08A | 800 | 800 | 650 | 756 |
| GGD10A | 1000 | 600 | 850 | 556 |
| GGD10A | 1000 | 800 | 850 | 756 |
| GGD12 | 1200 | 800 | 1050 | 756 |
Produce product Completeness
Our company provides the following documents and attachments when supplying goods:
- Packing List
- Product Certificate
- User Manual
- Factory test report
- Related electrical drawings
- Cabinet door keys, operating handles and spare parts specified in the contract.
Frequently Asked Questions (FAQ)
1. What are the ambient air temperature requirements for installing the GGD cabinet?
The ambient air temperature must not exceed +40℃ and should not fall below -5℃. Additionally, the average temperature over a 24-hour period inside the installation area must not exceed +35℃.
2. Is there an altitude limit for installing this electrical equipment?
Yes, the equipment is designed for indoor installation, and the altitude of the installation site must not exceed 2,000 meters above sea level.
3. How does ambient humidity affect GGD cabinet operations?
At a maximum temperature of +40℃, relative humidity should not exceed 50%. Higher relative humidity is acceptable at lower temperatures (for example, up to 90% at +20℃), provided precautions are taken against condensation caused by temperature changes.
4. Can I customize the busbar material from aluminum to copper?
Yes. Although the standard configuration uses a single aluminum busbar for rated currents up to 1500A, the manufacturer can replace the aluminum busbar with a copper busbar of equivalent current-carrying capacity based on user requirements.
5. What components are designed to improve the dynamic stability of the main circuit?
The GGD cabinets utilize a ZMJ type combined busbar clamp and insulation support. The busbar clamp is molded from high-strength, high-flame-retardant PPO alloy material to ensure high insulation strength and reliable self-extinguishing performance.
6. What documentation and accessories are included in the product delivery?
The standard delivery package includes a Packing List, Product Certificate, User Manual, Factory test report, related electrical drawings, cabinet door keys, operating handles, and contract-specified spare parts.