The HXGN-12 closed-loop ring main unit (RMU) is a compact, high-performance switchgear solution designed for modern power distribution networks. Widely used in urban grids, industrial parks, and renewable energy systems, this SF6 gas-insulated switchgear ensures reliable power supply, enhanced safety, and simplified maintenance. Below, we delve into its design, technical features, applications, and advantages in today’s evolving energy landscape.
1. Product Introduction
The HXGN-12 is a modular, metal-enclosed switchgear optimized for 12 kV distribution systems. Its closed-loop ring network configuration allows seamless power transfer between multiple feeders, minimizing downtime during faults. Key components include:
SF6 Gas-Insulated Load Break Switches: Ensure arc-free interruption and long service life.
Vacuum Circuit Breakers (optional): For higher fault current interruption capacity.
Integrated Protection Relays: Support overcurrent, earth fault, and short-circuit protection.
Smart Monitoring Interfaces: Enable real-time data collection for IoT-enabled grid management.
2. Structural Design and Key Features
Compact and Robust Construction
Gas-Insulated Compartments: SF6 gas provides superior insulation and arc-quenching properties, reducing equipment footprint by up to 50% compared to air-insulated units.
Modular Design: Easy expansion with additional feeder or transformer modules.
Hermetically Sealed Enclosure: Stainless steel or aluminum alloy housing with IP67 protection against dust, moisture, and corrosion.
Safety and Reliability
Double-Isolation Mechanism: Visible breakpoints and grounding switches ensure operator safety during maintenance.
Pressure Relief Devices: Automatically vent gas in case of internal overpressure to prevent explosions.
Compliance: Meets IEC 62271-200, GB/T 3906, and other international standards.
3. Technical Specifications
| Parameter | Specification |
|---|
| Rated Voltage | 12 kV |
| Rated Current | 630 A / 1250 A (optional) |
| Short-Circuit Withstand | 20 kA (1s) / 25 kA (optional) |
| SF6 Gas Pressure | 0.04 MPa (20°C) |
| Operating Temperature | -25°C to +40°C |
4. Typical Applications
The HXGN-12 is ideal for:
Urban Distribution Networks: Ensures uninterrupted power supply in densely populated areas.
Industrial Facilities: Manages high-load demands in manufacturing plants and data centers.
Renewable Energy Integration: Connects solar/wind farms to the grid with fault-tolerant switching.
Mining and Offshore Platforms: Resists harsh environments due to its rugged, sealed design.
5. Advantages Over Conventional Switchgear
Space-Saving: Ideal for installations with limited space, such as underground substations.
Low Maintenance: SF6 insulation reduces wear, with maintenance intervals up to 20 years.
Smart Grid Ready: Compatible with SCADA systems and remote monitoring platforms for predictive maintenance.
Eco-Friendly: SF6 gas is contained within closed systems, minimizing environmental impact.
6. Installation and Maintenance Best Practices
Site Preparation: Ensure a level, vibration-free foundation and adequate ventilation.
Gas Handling: Use SF6 gas recovery devices during installation/repairs to comply with emission regulations.
Routine Checks: Monitor gas pressure, mechanical interlocks, and contact resistance annually.
Case Study: HXGN-12 in a Smart City Project
A municipal utility in [City X] deployed 50 HXGN-12 units to modernize its aging grid. Results included:
Future Trends
As grids transition toward digitalization and decarbonization, the HXGN-12 is evolving with:
Conclusion
The HXGN-12 closed-loop network switchgear stands as a cornerstone of efficient and resilient power distribution. Its compact design, SF6 insulation, and adaptability to smart technologies make it a future-proof choice for utilities and industries worldwide. By prioritizing safety, reliability, and sustainability, the HXGN-12 continues to set benchmarks in medium-voltage switchgear innovation.
For customized solutions or technical inquiries about the HXGN-12, contact our team today!
