GGD AC Low Voltage Power Distribution Cabinet

Toonice GGD type AC low-voltage distribution cabinet is suitable for AC 50Hz, rated working voltage 380V, rated working current up to 3150A power distribution systems of power users such as power plants, substations, factories and mining enterprises, as an electric energy conversion, For distribution and control purposes.

The GGD AC Low Voltage Power Distribution Cabinet is a new type of low-voltage distribution cabinet designed in accordance with the requirements of the Ministry of Energy supervisors, power users and design departments, and based on the principles of safety, economy, reasonableness and reliability. The product has the characteristics of high breaking capacity, good dynamic and thermal stability, flexible electrical scheme, convenient combination, seriality, strong practicability, novel structure, and high protection level. It can be used as an updated product for low-voltage complete sets of switchgear.

GGD type AC low voltage distribution cabinet complies with IEC439 "Low Voltage Complete Sets of Switchgear and Control Equipment", GB7251 "Low Voltage Complete Sets of Switchgear" and other standards.

Features

1. High breaking capacity and dynamic thermal stability: GGD low - voltage switchgear has high breaking capacity and excellent dynamic thermal stability, safely and reliably cutting off circuits in the power system.

2. Flexible electrical schemes and convenient combination: With flexible electrical schemes and convenient combination, it suits different power demand scenarios, featuring high seriality and practicality.

3. High protection level: Novel - structured with a high protection level, GGD low - voltage switchgear offers good protection, applicable to various industrial environments.

4. Wide applicability: Suitable for power users like power plants, substations, and industrial enterprises, it applies to power distribution systems (AC 50Hz, rated voltage 380V, rated current up to 3150A) for power, lighting, and distribution equipment’s energy conversion, distribution, and control.

5. Strong versatility: The universal cabinet of GGD low - voltage switchgear, welded by 8MF cold - drawn steel with 20 - module mounting holes, facilitates main bus duct installation and adjustment.

Usage Environment

1. Ambient temperature: Does not exceed 50% at a maximum temperature of +40°C. A higher relative humidity is permitted at lower temperatures (e.g., 90% at +20°C). The effect of occasional condensation due to temperature changes should be considered.

2. When installed, the inclination of the equipment from the vertical does not exceed 5°.

3. The equipment should be installed in places free from severe vibration and shock, and in locations where electrical components are not exposed to corrosion.

Note: When ordering this product beyond the above - specified conditions, please consult with our company.

Product Details

1. Main Circuit Scheme

The main circuit of GGD cabinet has designed 129 schemes, with a total of 298 specifications (excluding the schemes and specifications derived from the functional changes of the auxiliary circuit and the change of control voltage). Among them: GGD1 type has 49 schemes and 123 specifications; GGD2 type has 53 schemes and 107 specifications; GGD3 type has 27 schemes and 68 specifications.

The main circuit schemes are compiled by collecting the opinions of a large number of design and use departments, and schemes required by power plants are added. The rated current is up to 3150A, suitable for distribution transformers of 2000kVA and below. In addition, to meet the needs of reactive power compensation, GGJ1 and GGJ2 capacitor compensation cabinets are designed, with 4 main circuit schemes and a total of 12 specifications.

2. Auxiliary Circuit Scheme

The design of the auxiliary circuit is divided into two parts: the power supply scheme and the power plant scheme. There is enough space in the GGD cabinet to install secondary components. At the same time, the special LMZ3D current transformer has been developed and manufactured to meet the needs of power plants and special users for attaching relay protection.

3. Main Busbar

Considering the cost - performance ratio and the feasibility of aluminum replacing copper, a single - aluminum busbar can be used when the rated current is 1500A and below, and a double - copper busbar is used when the rated current is greater than 1500A. The manufacturer produces prototypes according to this regulation and passes the type test. Of course, the manufacturer can also replace the aluminum busbar with a copper busbar of the same current - carrying capacity according to the user's request. The overlapping surfaces of the busbars are all treated with a tinning process.

4. Selection of Electrical Components

GGD cabinets mainly use more advanced electrical components that can be mass - produced in China. At the same time, according to the principles of economy and rationality, and with full consideration of feasibility, some usable old products such as DZ10D and DZ20 are retained, and obsolete products are not selected.

HD13BX and HS13BX rotary - operated knife switches are special components designed to meet the unique structure requirements of GGD cabinets. They change the operation mode of the mechanism and retain the advantages of old products, being a kind of new practical electrical components.

If the design department selects new - type electrical components with better performance and more advanced technology according to user needs, due to the good installation flexibility of GGD cabinets, it generally will not cause difficulties in manufacturing and installation due to the renewal of electrical components.

To further improve the dynamic stability of the main circuit, the special ZMJ combined busbar clamp and insulation support for GGD cabinets are designed. The busbar clamp is thermoplastically molded from high - strength, high - flame - retardant PPO alloy material, with high insulation strength, good self - extinguishing performance, and a unique structure. Only by adjusting the 积木式 (building - block - style) intervals can it be conveniently combined into a single busbar clamp or double busbar clamp. The insulation support is a sleeve - type molded structure, with low cost and high strength, solving the defect of insufficient creepage distance in old products.

The GGD Low Voltage Withdrawable Switchgear combines advanced features with versatile applications, making it an excellent choice for a wide range of power distribution requirements.