APR6-12/24/40.5 series of SF6 Gas Insulated Metal Enclosed Switchgear (c-GlS) is independently developed by our company with sulfur hexafluoride gas as the insulating medium and can be applied in primary or secondary power distribution at a same time. lt is a new-generation medium-voltage whole-set switchgear with vacuum arc extinguishing technology, APG solid sealed technology, gas insulation technology and interface insulation technology. The product has passed the type test verification and new product technology appraisal by China’s national authoritative testing institution, The product can be widely used in various important power distribution and substation systems of China’s national economy, such as power distribution and substation network, urban power supply network, large industrial and mining enterprises, petrochemical, metallurgy, urban rail transit and so on.

The product has a modular design and can be combined according to various design schemes. The product has a sealed pressure system and all high-voltage live parts of its main circuit are sealed in the stainless steel gas tank without influence from environments. It runs reliably, is compact with little space occupied and free from maintenance.

Main Technical Parameters

The SF6 gas insulated switchgear (GIS) is an advanced, compact, metal-enclosed electrical distribution solution designed for high and medium voltage applications. Its IEC certification ensures compliance with international safety and quality standards, making it a reliable choice for indoor and outdoor substations. With a compact design, durable construction, and efficient operation, this switchgear cabinet is suitable for modern Power Systems requiring space optimization, safety, and long-term reliability.

In this detailed guide, we cover applications, after-sales service, common issues, and daily maintenance of the SF6 GIS, providing a complete reference for operators, engineers, and procurement professionals.

Table of Contents

1. Overview of SF6 Gas Insulated Switchgear

2. Technical Specifications

3. Applications and Suitable Environments

4. Installation and Commissioning Guidelines

5. Daily Maintenance and Inspection

6. Common Issues and Troubleshooting

7. After-Sales Service and Support

8. Safety Considerations

9. Advantages of Compact Metal-Enclosed Design

10. Certifications and Compliance

11. Conclusion

1. Overview of SF6 Gas Insulated Switchgear

The SF6 Gas Insulated Switchgear (GIS) is a key component in modern power systems, offering high reliability, compact design, and low maintenance. Its main features include:

• SF6 Gas Insulation: Provides excellent dielectric properties and arc-quenching performance.

• Metal-Enclosed Structure: Enhances mechanical protection and reduces risk of electrical accidents.

• Compact Design: Ideal for installations with limited space, such as urban substations or indoor industrial facilities.

• IEC Certification: Ensures compliance with international standards for safety and performance.

• Indoor and Outdoor Use: Flexible for various environmental conditions.

2. Technical Specifications

The following table summarizes the key technical parameters of the SF6 GIS:

This specification ensures reliable performance in demanding applications, from urban substations to industrial power distribution.

3. Applications and Suitable Environments

SF6 GIS is widely deployed in:

• Substations: Medium and high-voltage substations for electricity transmission and distribution.

• Industrial Facilities: Factories, manufacturing plants, and chemical plants requiring reliable power protection.

• Urban Power Grids: Compact design is ideal for high-density areas with limited space.

• Renewable Energy Plants: Wind, solar, and hydroelectric plants for efficient distribution.

• Railway Electrification Systems: Provides stable and safe electrical supply for traction power.

Indoor vs Outdoor Use:

• Indoor GIS: Installed in controlled environments, reduces exposure to weather, dust, and pollution.

• Outdoor GIS: Designed with enhanced insulation and corrosion-resistant enclosures to withstand harsh weather conditions.

4. Installation and Commissioning Guidelines

4.1 Site Preparation

Before installation, ensure:

• A level and stable foundation with proper grounding.

• Adequate clearance for operation, inspection, and maintenance.

• Environmental conditions meet the specified temperature and humidity ranges.

4.2 Installation Procedure

1. Positioning the Cabinet: Place the metal-enclosed switchgear according to layout drawings.

2. Electrical Connections: Connect incoming and outgoing cables securely to the designated terminals.

3. SF6 Gas Filling: Confirm the gas pressure is within the recommended range.

4. Mechanical Alignment: Ensure all moving parts operate smoothly without obstruction.