XGN15-12(SF6) Unit AC Metal-enclosed Ring Network Switchgear (hereinafter referred to as ring network switchgear) adopts advanced foreign technology and meets the demands of domestic and urban network reconstruction. It is a new generation of high-voltage electrical products developed through independent design and development. All the technical performance meets the standards of IEC 62271-200:2003 and GB 3006.

The main switch, operating mechanism, and other components of the ring network switchgear use original ABB equipment or SF1-12 switchgear, which is assembled in China using imported parts. We can also use original imported ABB equipment: SF1 type SF6 circuit breaker or VD4-S type Vacuum Circuit Breaker. Its operation mode can be divided into two types: manual and electric. The cabinet is processed using numerical control machine tools and connected by rivets. Its protection degree is IP3X. It has a reliable mechanical interlock and an operation function for error prevention.

The product has a small volume, light weight, beautiful appearance, easy operation, long life, high parameters, no pollution, and requires minimal maintenance, making it an extremely remarkable product.

XGN15-12(SF6) Unit AC Metal-enclosed Ring Network Switchgear is used in the power system of AC 50Hz 12kV to receive and distribute power. The main switch in the cabinet is an SF6 switch.

Main Technical Parameters

The XGN15-12 24KV SF6 Ring Main Unit (RMU) Cabinet is a high-performance, medium voltage electrical distribution device designed for reliable, safe, and efficient operation. Its SF6 gas insulation and metal-enclosed design ensure superior safety, compactness, and durability, making it ideal for urban substations, industrial facilities, and utility networks.

This comprehensive guide covers safety instructions, installation guidelines, troubleshooting common issues, and technical services, providing a complete reference for engineers, operators, and procurement professionals.

Table of Contents

1. Overview of XGN15-12 RMU Cabinet

2. Technical Specifications

3. Safety Instructions

4. Installation Guidelines

5. Common Faults and Causes

6. Troubleshooting and Corrective Actions

7. Technical Services and Support

8. Advantages of SF6 RMU Design

9. Applications and Suitable Environments

10. Certifications and Compliance

11. Conclusion

1. Overview of XGN15-12 RMU Cabinet

The XGN15-12 SF6 RMU Cabinet is designed for medium voltage ring main distribution networks, offering:

• SF6 Gas Insulation: Exceptional dielectric strength and arc-quenching performance.

• Metal-Enclosed Structure: Enhances mechanical protection and operator safety.

• Compact Design: Saves space in indoor and outdoor installations.

• Reliable Switching: Enables smooth operation and long service life.

• IEC Certification: Compliance with international safety and performance standards.

This RMU is suitable for urban electrical grids, industrial power distribution, and utility substations, ensuring safe and efficient network management.

2. Technical Specifications

These specifications ensure high reliability and long-term performance under various environmental and operational conditions.

3. Safety Instructions

Proper safety measures are critical when working with medium voltage RMUs:

3.1 General Safety Guidelines

• Always disconnect power supply before maintenance or inspection.

• Wear personal protective equipment (PPE), including insulated gloves, safety glasses, and protective clothing.

• Avoid direct contact with SF6 gas; it is non-toxic but can displace oxygen in confined spaces.

• Follow manufacturer and IEC guidelines for operation, testing, and maintenance.

• Ensure proper grounding of all equipment.

3.2 Operational Safety

• Operate switches slowly and deliberately to avoid mechanical damage.

• Do not override mechanical interlocks.

• Ensure access areas are clear of unauthorized personnel.

• Monitor gas pressure and mechanical indicators before switching operations.

Adhering to these guidelines ensures operator safety, equipment reliability, and long-term system performance.

4. Installation Guidelines

4.1 Site Preparation

• Select a stable and level foundation with adequate drainage.

• Ensure sufficient clearance for operation and maintenance.

• Verify environmental conditions comply with temperature and humidity requirements.

• Prepare grounding systems according to electrical standards.

4.2 Installation Procedure

1. Position the Cabinet: Align the RMU according to layout diagrams.

2. Secure the Base: Fix the cabinet to the foundation with bolts.

3. Electrical Connections: Connect incoming and outgoing feeders as per wiring diagrams.

4. SF6 Gas Check: Confirm pressure is within recommended levels.

5. Mechanical Test: Verify switches operate smoothly.

6. Functional Test: Conduct no-load and load switching tests.

4.3 Commissioning Checklist

5. Common Faults and Causes