GGD & GBD Low-Voltage Fixed Switchgear
Rated Voltage: 380V | Rated Current: Up to 3150A | Frequency: 50Hz
Compliant with GB/T 7251.1 and IEC 61439
Product Overview
The GGD & GBD Low-Voltage Fixed Switchgear is a reliable power distribution solution designed for electric energy distribution, motor control, protection, and system management in low-voltage power systems. Suitable for 50Hz AC networks with a rated voltage of 380V and rated current up to 3150A, it is widely used in power plants, substations, industrial facilities, commercial buildings, and infrastructure projects.
Developed in cooperation with power utilities, design institutes, and end users, the GGD & GBD series combines high safety, stable performance, flexible configuration, and cost-effective operation. Its robust fixed-type design offers excellent short-circuit withstand capability, reliable thermal stability, and long service life, making it an ideal choice for modern low-voltage power distribution systems.
Key Technical Features
| Feature |
Description |
| High Breaking Capacity |
Safely interrupts fault currents, ensuring reliable protection for power and lighting distribution systems. |
| Excellent Dynamic & Thermal Stability |
Designed to withstand short-circuit mechanical and thermal stresses while maintaining stable operation. |
| Flexible Electrical Configurations |
Supports various distribution schemes for motors, lighting circuits, and power distribution equipment. |
| Modular Functional Arrangement |
Functional units can be flexibly combined within the same cabinet to meet different project requirements. |
| Wide Current Range |
Complete product specifications covering a broad range of low-voltage applications up to 3150A. |
| Optimized Cabinet Structure |
Compact design simplifies installation, cable routing, inspection, and maintenance. |
| Selectable Protection Degree |
Available with IP30 or IP40 enclosure protection for different installation environments. |
| Reliable Long-Term Performance |
Built with high-quality components to minimize downtime and reduce maintenance costs throughout its service life. |
Service Conditions
The GGD & GBD switchgear is designed for indoor installation under the following operating conditions:
| Condition |
Requirement |
| Ambient Temperature |
–30°C to +50°C (24-hour average ≤ +50°C) |
| Altitude |
≤ 2500 m above sea level |
| Relative Humidity |
≤ 50% at +40°C; up to 90% at +20°C (occasional condensation permitted) |
| Atmospheric Conditions |
No fire or explosion hazards, severe pollution, corrosive gases, or excessive dust |
| Installation Inclination |
≤ 5° |
| Mechanical Environment |
No severe vibration, impact, or mechanical stress |
For applications involving high altitude, high humidity, corrosive environments, or outdoor installation, customized engineering solutions are available upon request.
Typical Applications
The GGD & GBD series is widely used in various low-voltage power distribution projects, including:
| Industry |
Typical Applications |
| Power Plants & Substations |
Auxiliary power distribution, lighting distribution panels |
| Industrial & Mining Facilities |
Fixed motor control centers (MCC), production equipment power distribution |
| Commercial Buildings |
Main low-voltage distribution boards, lighting and power systems |
| Infrastructure Projects |
Airports, metro stations, tunnels, water treatment plants, and public utilities |
| Retrofit Projects |
Replacement and upgrading of existing low-voltage switchgear systems |
Why Choose GGD & GBD Switchgear?
- Utility-Proven Design – Developed with input from power utilities, engineering institutes, and end users.
- Reliable Performance – Proven operation in demanding industrial and commercial environments.
- Cost-Effective Solution – Lower investment cost than withdrawable switchgear while maintaining high reliability.
- Easy Installation & Maintenance – Fixed-type configuration allows convenient inspection and maintenance.
- International Standards Compliance – Manufactured in accordance with GB/T 7251.1 and IEC 61439.
Ordering & Customization
To meet different project requirements, we provide flexible OEM and engineering customization services, including:
- Detailed dimensional drawings
- Short-circuit verification calculations
- Customized internal separation (Form 2b, Form 3b, Form 4b, subject to project requirements)
- Special copper busbar configurations
- Integration with third-party ACBs, MCCBs, protection relays, and metering devices
- Customized cabinet dimensions, colors, cable entry methods, and electrical layouts
Our engineering team is available to provide tailored solutions for industrial, commercial, utility, and infrastructure projects.
