Product Overview
The GGD low-voltage fixed switchgear is a modular, factory-assembled, metal-enclosed power distribution equipment designed for rated voltages up to 660V and rated frequencies of 50Hz or 60Hz. It is widely used in power distribution and control applications in power plants, substations, industrial facilities, commercial buildings, and infrastructure projects.
The product complies with GB 7251, IEC 61439, and relevant international standards, featuring a flexible, fully modular construction with standardized functional units. The fixed design offers cost-effective solutions with stable performance and simplified maintenance, making it an ideal choice for power distribution systems with high reliability and economy requirements.

Key Features
1. Modular and Flexible Construction
The cabinet frame is assembled from high-strength steel sections with modular holes, allowing flexible combination of functional units. The modular design enables easy reconfiguration and future expansion. Standardized components ensure interchangeability and simplified maintenance.
2. Fixed Functional Units
The switchgear features fixed-mounted functional units, with the main busbar and branch busbar configuration providing stable and reliable electrical connections. The fixed design offers cost-effective solutions with simplified wiring and maintenance procedures.
3. Compact and Space-Saving Design
The compact design accommodates more functional units in a smaller footprint. The cabinet features an optimized layout for maximum space efficiency and convenient operation.
4. High Safety and Reliability
The cabinet is divided into separate compartments including the main busbar compartment, functional unit compartment, and cable compartment. Compartments are separated by steel plates or high-strength flame-retardant functional barriers to prevent fault propagation. The enclosure design includes pressure relief channels for internal arc fault protection.
5. Versatile Functional Unit Options
The switchgear supports multiple functional unit configurations including incoming and outgoing feeder units, motor control units, power factor correction units, and metering units. Various functional unit capacities and configurations can be mixed within the same cabinet.
6. Advanced Busbar System
The main and branch busbars are made of high-conductivity electrolytic copper with silver-plated connections for low contact resistance. The busbar system is protected by high-strength flame-retardant functional barriers for enhanced arc fault protection and insulation.
7. Intelligent Monitoring and Communication
Optional smart monitoring systems with integrated digital meters, protection relays, and communication modules are available. Standard communication protocols including Modbus, Profibus, and IEC 61850 enable seamless integration with SCADA and building automation systems.
8. High Environmental Adaptability
The enclosure is available with protection ratings from IP30 to IP54, suitable for various indoor environments. The cabinet design has been verified through rigorous testing including seismic testing, arc fault testing, and high-altitude testing.

Technical Specifications
Rated Voltage: 400V, 660V
Rated Insulation Voltage: 660V, 1000V
Rated Frequency: 50Hz or 60Hz
Rated Current (Main Busbar): Up to 4000A
Rated Current (Branch Busbar): Up to 1600A
Rated Short-Time Withstand Current: 15kA, 30kA, 50kA (1s)
Rated Peak Withstand Current: 30kA, 63kA, 105kA
Protection Rating: IP30, IP31, IP40, IP42, IP54 (customizable)
Enclosure Material: High-strength steel plate with electrostatic powder coating
Cabinet Dimensions: 600mm, 800mm, 1000mm, 1200mm (width) x 600mm, 800mm, 1000mm (depth) x 2200mm (height)
Functional Unit Configurations: Incoming units, outgoing units, motor control units, capacitor units, metering units
Connection Method: Fixed-mounted
Cable Entry/Exit: Top, bottom, or side (customizable)
Operating Temperature: -5°C to +40°C
Altitude: Up to 2000m above sea level (customizable)

Applications
The GGD switchgear is extensively used in power plants and substations for low-voltage power distribution and control. Industrial facilities including manufacturing plants, mining operations, petrochemical plants, and metallurgical facilities rely on this switchgear for reliable power distribution. Commercial and high-rise buildings benefit from its cost-effective design and flexible configuration. Infrastructure projects such as airports, railway stations, and ports utilize GGD switchgear for reliable low-voltage power distribution. Renewable energy applications including photovoltaic plants and wind farms employ this switchgear for auxiliary power distribution and control. Municipal projects, hospitals, and data centers also rely on GGD switchgear for high-reliability power distribution systems.

Compliance Standards
GB 7251 Low-Voltage Switchgear and Controlgear Assemblies, IEC 61439-1 Low-Voltage Switchgear and Controlgear Assemblies Part 1: General Rules, IEC 61439-2 Low-Voltage Switchgear and Controlgear Assemblies Part 2: Power Switchgear and Controlgear Assemblies, GB/T 20641 General Requirements for Low-Voltage Switchgear Enclosures, and JB/T 9661 Technical Specifications for Low-Voltage Fixed Switchgear.

Why Choose Us
Our GGD switchgear features modular construction with flexible configuration options to meet diverse application requirements. The fixed design provides cost-effective solutions with simplified maintenance and wiring. We perform comprehensive quality control including mechanical and electrical verification, dielectric withstand tests, and protection relay calibration before delivery. Customization options are available for busbar configuration, functional unit selection, and protection schemes to meet specific project requirements. Our engineering team provides professional technical support for system design, installation, and commissioning. Competitive pricing and efficient manufacturing processes ensure value for money. Comprehensive after-sales service includes installation guidance, commissioning assistance, spare parts supply, and technical support. Our switchgear products have been installed in numerous projects worldwide with proven reliability and customer satisfaction.