GGD Series Fixed-Type AC Low-Voltage Distribution Cabinets
GGD Series Fixed-Type AC Low-Voltage Distribution Cabinets I. Product Overview The GGD low-voltage fixed switchgear is designed based on the requirements of a wide range of power users and design departments, adhering to principles of safety, economy, rationality, and reliability. It is widely used in power distribution systems for AC 50Hz applications with rated operating voltages up to 380V and rated currents up to 4000A in power plants, substations, industrial facilities, and other power-consuming enterprises. This equipment serves as a crucial component for converting, distributing, and controlling electrical energy in power supply, lighting, and general distribution systems. The product complies with GB7251 and IEC61439 standards. II. Model Designation (Insert model designation details here) III. Operating Environment 1. Ambient air temperature shall not exceed 40°C, with an average daily temperature no higher than 35°C; the minimum ambient temperature is -25°C. 2. Average daily relative humidity should not surpass 95%, while the average daily vapor pressure should remain below 2.2 kPa. Monthly average relative humidity should be ≤90%, with monthly average vapor pressure not exceeding 1.8 kPa. 3. Altitude shall not exceed 2000 meters. 4. Seismic intensity: Level 8; horizontal acceleration ≤0.4g, vertical acceleration ≤0.2g. 5. The surrounding environment must not exhibit significant contamination from dust, smoke, corrosive or flammable gases, vapors, or salt spray. If special user requirements exist or if the above conditions cannot be met, please consult with the manufacturer for tailored solutions. IV. Technical Parameters | **Parameter** | **Unit** | **Value** | |-----------------------|----------|-----------------| | Rated Operating Voltage (Ue) | VAC | 380 | | Rated Insulation Voltage (Ui) | VAC | 660 | | Rated Frequency | Hz | 50/60 | | Rated Current (Main Busbar) | A | 630–4000 | | Main Busbar Rated Short-Time Withstand Current (Icw) | kA | 50, 65, 80 | | Distribution Busbar Rated Short-Time Withstand Current (Icw) | kA | 15, 30, 50 | | Main Switch Rated Breaking Capacity (Ics) | kA | 50, 65, 80 | | Protection Rating | IP | IP30, IP40 | | Surge Overvoltage Endurance Category | III | | V. Product Features 1. The product consists of a fully enclosed cabinet structure. The busbars are made of TMY hard copper bars, with horizontal busbars installed atop the cabinet using dedicated busbar frames, and vertical busbars secured by busbar clamps. 2. The protective circuitry of the switchgear comprises a separately installed PE conductor running along the entire length of the arrangement, complemented by conductive metal components. The N busbar is positioned at the front of the cabinet. 3. The cabinet’s main frame is constructed from 8MF steel profiles (cold-rolled steel bent into shape) or C-channel sections assembled using specialized connectors. The mounting module features holes spaced at either 20mm or 25mm intervals. The cabinet surface is coated with high-pressure electrostatic powder coating, offering excellent adhesion and a premium texture. 4. The product boasts advanced design, innovative and rational structural features, superior protection ratings, large capacity, robust short-circuit breaking capabilities, and outstanding dynamic and thermal stability. Its electrical configurations are practical, versatile, and widely applicable, making it suitable as a modernized replacement solution. 5. The primary configuration options include: overhead incoming power, cable incoming power, standby power input, bus tie, air circuit breaker feed, knife-fuse switch feed, current-limiting air circuit breaker feed, contactor feed, fuse feed, lighting circuits, and reactive power compensation systems.
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GGD Series Fixed-Type AC Low-Voltage Distribution Cabinets
Detailed introduction
GGD Series Fixed-Type AC Low-Voltage Distribution Cabinets
I. Product Overview
The GGD low-voltage fixed switchgear is designed according to the requirements of a wide range of power users and design departments, adhering to the principles of safety, economy, rationality, and reliability. This low-voltage distribution cabinet is widely used in power plants, substations, industrial and mining enterprises, and other power-user applications, handling AC systems with a frequency of 50 Hz, a rated operating voltage of 380V, and a rated operating current up to 4000A. It serves as the primary equipment for electrical energy conversion, distribution, and control in power, lighting, and general-purpose distribution systems. The product complies with GB7251 and IEC61439 standards.
II. Model Meaning 
III. Operating Environment
1. The ambient air temperature does not exceed 40°C, with a daily average no higher than 35°C; the minimum ambient air temperature is -25°C.
2. The daily average relative humidity does not exceed 95%; the daily average water vapor pressure does not surpass 2.2 kPa; the monthly average relative humidity remains below 90%; and the monthly average water vapor pressure stays under 1.8 kPa.
3. Altitude not exceeding 2000m;
4. Seismic Intensity: 8 degrees; Horizontal Acceleration ≤ 0.4g, Vertical Acceleration ≤ 0.2g;
5. The surrounding air is not noticeably contaminated by dust, smoke, corrosive and/or flammable gases, vapors, or salt spray.
When users have special requirements or the above-mentioned usage conditions cannot be met, they should consult with the manufacturer for a solution.
4. Technical Specifications
| Project | Unit | Numerical values |
| Rated operating voltage Ue | V | AC380 |
| Rated Insulation Voltage Ui | V | AC660 |
| Rated frequency | Hz | 50/60 |
| Rated Current (Main Busbar) | A | 630 to 4000 |
| Main busbar rated short-time withstand current (Icw) | kA | 50, 65, 80 |
| Rated Short-Time Withstand Current of Distribution Busbar (Icw) | kA | 15, 30, 50 |
| Main switch rated making and breaking capacity (Ics) | kA | 50, 65, 80 |
| Protection Level | IP30, IP40 | |
| Impact Overvoltage Category | III |
V. Product Features
1. The product consists of a closed cabinet structure, with TMY hard copper busbars used as the main busbar system. The horizontal busbar is installed on the top of the cabinet using a dedicated busbar frame, while the vertical busbars are securely fixed with busbar clamps.
2. The protection circuit of the switchgear consists of a separately installed PE conductor that runs along the entire length of the arrangement, as well as conductive metal components; the N busbar is positioned at the front of the cabinet.
3. The cabinet frame is constructed using 8MF steel profiles (cold-rolled steel bent into shape) or C-shaped profiles assembled with specialized connectors. Its mounting module features holes spaced at either 20mm or 25mm intervals, while the cabinet surface is finished with a high-pressure electrostatic powder coating that offers excellent adhesion and a premium tactile quality.
4. The product features advanced design, a novel and well-structured layout, high protection levels, large capacity, strong breaking capability, excellent dynamic and thermal stability, and practical electrical solutions. It also boasts broad series compatibility and outstanding usability, making it an ideal choice for upgrading and replacing existing products.
5. The main scheme includes: overhead power supply, cable power supply, backup power supply, interconnection, air switch feeding, knife-fuse switch feeding, current-limiting air switch feeding, contactor feeding, fuse feeding, lighting, and reactive power compensation.
Company Address:
No. 9 Qianfeng North Road, Shiji Town, Panyu District, Guangzhou City
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