Huajidian Gas Insulated Switchgear is a fully enclosed modular high-voltage switchgear. Circuit breakers, disconnectors, grounding switches, busbars, and protective devices are encapsulated within a grounded metal casing filled with pressurized sulfur hexafluoride gas for insulation. Unlike traditional air-insulated switchgear, its internal live parts are completely isolated from external dust, moisture, and contaminants, allowing for stable operation in extreme environments such as high temperature, high humidity, salt spray, and high altitude.
Modular, fully sealed design reduces the footprint by 50%-70% compared to air-insulated switchgear. Suitable for installation in urban underground substations, building equipment floors, and land-constrained industrial areas, significantly reducing land acquisition and infrastructure costs for power projects.
Fully sealed structure isolates external contamination, significantly reducing the probability of equipment failure.
Sulfur hexafluoride gas has arc-quenching performance far exceeding that of air, quickly cutting off fault current.
No exposed live parts, completely avoiding safety risks such as electric shock and arc flashover, ensuring the personal safety of maintenance personnel.
The Gas Insulated Switchgear has a regular maintenance interval of up to 10 years and an overall service life of 35-40 years, effectively reducing downtime and maintenance costs. The equipment is equipped with intelligent monitoring sensors that can monitor gas pressure, temperature, and partial discharge in real time, enabling predictive maintenance.
The equipment operates in an ambient temperature range of -40℃ to +55℃, and can operate stably in coastal salt spray areas, desert sandstorm areas, and high-altitude areas up to 3000 meters above sea level.
The core switching component with excellent arc-extinguishing capabilities.
Used to isolate circuits during equipment maintenance, ensuring operational safety.
Transmits current within a sealed gas chamber, reducing energy loss.
Protects against lightning strikes and transient overvoltages, safeguarding the entire equipment.
Monitors SF6 gas pressure and purity in real time, automatically alarming in case of leakage.
Supports remote monitoring and automatic fault protection, and can be integrated with data acquisition and monitoring systems.
Suitable for indoor and underground substations in urban core areas, widely used in urban power grid renovation projects where land resources are scarce.
Applicable to locations with extremely high requirements for power supply continuity, such as semiconductor plants, oil refineries, and data centers. It withstands complex environments including dust and corrosive gases.
Suitable for offshore wind power and ground-mounted photovoltaic power stations. Unaffected by salt spray and harsh environments in remote areas, it is the preferred equipment for grid connection of new energy power stations.
Operates stably in low-voltage environments such as mountains and plateaus, without exhibiting the insulation performance degradation issues common in traditional switchgear.
Project Challenges: The industrial park covers a total area of 500,000 square meters. The area experiences consistently high temperatures (up to 50℃) and frequent sandstorms. The client required the power distribution equipment to be compact, heat-resistant, and sandstorm-resistant.
Solution: Huajidian customized a 132kV Gas Insulated Switchgear for this project, featuring a modular structure and an IP67 fully sealed enclosure, constructed with high-temperature resistant materials. The product meets Dubai Electricity and Water Authority standards and has successfully obtained Saudi SABER certification.
Project Results: The substation officially commenced operation in 2024, achieving a 99.99% equipment reliability rate. Compared to traditional air-insulated solutions, the equipment footprint was reduced by 65%, and the overall construction period was shortened by 30%. Currently, it provides stable power to over 200 industrial enterprises within the industrial park.
Raw materials such as steel plates, sulfur hexafluoride gas, and various components are inspected before warehousing to ensure compliance with international standards.
Comprehensive inspections are conducted throughout key processes such as welding, assembly, and gas filling to control processing precision.
Each piece of equipment undergoes full testing before leaving the factory, including insulation performance, breaking capacity, and airtightness.
All products have authoritative certifications such as IEC 62271, CE, IECEx, and ATEX. We can also assist customers with obtaining market access certifications for various countries, such as Saudi Arabia's SABER and Indonesia's SNI.
A: The core difference lies in the insulation medium and overall structure. GIS uses sulfur hexafluoride gas-sealed insulation, resulting in a smaller footprint, higher reliability, and stronger environmental adaptability. Air-insulated switchgear relies on air insulation, requiring a larger footprint and being more susceptible to external environmental influences, but has a lower initial purchase cost.
A: Under normal operating conditions, the equipment has a service life of 35-40 years. Routine maintenance is simple: periodically check the sulfur hexafluoride gas pressure through the monitoring system and inspect the equipment cabinet. A professional performance test should be performed every 5 years. Large-scale disassembly and maintenance are not required during the normal service life.
A: Yes. We can provide customization services for all voltage levels from 6kV to 330kV, adjusting single/double busbar configurations, protection levels, and control functions according to project needs. We also provide technical guidance and certification assistance services.
Power System 12kV/24kV, 50Hz
Certifications IEC 62271-200, IEC 694, GB3906, DIN VDE 0670
Power System 12kV/24kV, 50Hz
Certifications IEC 62271-200, IEC 694, GB3906, DIN VDE 0670
Power System 12kV, 630A/1250A/2500A
Certifications IEC 62271-200, IEC 694, GB3906, DIN VDE 0670
Power System 12kV, 630A
Certifications IEC 62271-200, IEC 694, GB3906, DIN VDE 0670
Power System 12kV. 3-phase AC 50Hz
Certifications IEC 62271-200, IEC 694, GB3906, DIN VDE 0670
Power System 10kV, 50/60hZ
Certifications IEC 62271-200, IEC 694, GB3906, DIN VDE 0670
