- Introduction to XGN66-12 Ring Main Unit
- Applications of XGN66-12 RMU
- Market Trends and Background
- Technical Specifications of XGN66-12
- Ring Main Unit Parameters
- Electrical Characteristics & Ratings
- Key Features and Benefits
- Comparison with Other Switchgear Types
- Selection and Purchase Guidance
- Frequently Asked Questions (FAQ)
Introduction to XGN66-12 Ring Main Unit
In the evolving landscape of medium-voltage power distribution, Ring Main Units (RMUs) continue to play a crucial role by ensuring reliability, safety, and operational flexibility. The XGN66-12 Ring Main Unit is a high-performance, metal-enclosed air-insulated switchgear designed for medium-voltage networks up to 12kV. Combining compactness, modularity, and superior operational safety, XGN66-12 offers outstanding solutions for modern energy systems.
Applications of XGN66-12 RMU
The XGN66-12 RMU is widely utilized in:
- Urban and rural distribution networks
- Industrial manufacturing facilities
- Commercial buildings and shopping malls
- Transportation infrastructure (airports, railway systems)
- Renewable energy projects (solar, wind, hydropower plants)
Its versatility and resilience make it particularly valuable in environments where stability and uninterrupted power supply are paramount.
Market Trends and Background
With the continuous expansion of urbanization and the growing need for decentralized energy systems, RMUs are becoming essential in modern grid architecture. According to IEEE and IEEMA reports, RMUs contribute significantly to enhancing the reliability and automation of secondary distribution networks (source).
Driven by the integration of smart grid technologies and increasing emphasis on sustainable energy, the market for compact, efficient switchgear like XGN66-12 continues to expand.
Technical Specifications of XGN66-12
Ring Main Unit Parameters
| No. | Item | Unit | Technical Data |
|---|---|---|---|
| 1 | Rated voltage | kV | 3.6 / 7.2 / 12 |
| 2 | Rated current | A | 630 / 1000 / 1250 / 2000 / 2500 / 3150 |
| 3 | Rated short-circuit breaking current | kA | 20 / 31.5 / 40 |
| 4 | Rated short-time withstand current | kA | 20 / 31.5 / 40 |
| 5 | Rated peak withstand current | kA | 50 / 80 / 100 |
| 6 | Rated short-circuit making current | kA | 50 / 80 / 100 |
| 7 | Duration of short circuit | s | 4 |
| 8 | Degree of protection | — | IP2X |
| 9 | Bus system | — | Single bus, single bus with bypass, double bus |
| 10 | Operating method | — | Electromagnetic / Spring mechanism |
| 11 | Dimensions (W×D×H) | mm | 950–1000 × 1000 × 2300 (for ≤1250A), 1000×1000×2300 (for >1250A) |
Electrical Characteristics & Ratings
| Parameter | Unit | Value |
| Rated Working Voltage | V | AC400–AC690 |
| Rated Frequency | Hz | 50 (60 optional) |
| Rated Insulation Voltage | V | 660–800 |
| 1 min Power Frequency Voltage | kV | 2500–3000 |
| Control Motor Power | kW | 0–155 |
| Rated Short-Time Withstand Current | kA | 15 / 30 / 50 |
| Rated Peak Withstand Current | kA | 30 / 63 / 105 |
| Degree of Protection | — | IP30 |
Key Features and Benefits
- Flexible Busbar Configurations: Supports single bus, bypass bus, and double bus systems.
- High Short-Circuit Capability: Rated for short-circuit breaking currents up to 40kA.
- Compact Design: Minimal footprint without compromising performance.
- Versatile Operating Mechanisms: Electromagnetic and spring-operated options.
- Durable Protection: IP2X enclosure ensures personnel and system safety.
- Ease of Integration: Designed for compatibility with SCADA and smart grid networks.
Comparison with Other Switchgear Types
| Feature | XGN66-12 RMU | XGN2-12 RMU | GIS Systems |
| Insulation Medium | Air | Air | SF₆ Gas |
| Application Level | Secondary Distribution | Secondary Distribution | Primary / Secondary |
| Size | Compact | Compact | Very Compact |
| Maintenance Needs | Low | Moderate | Very Low |
| Typical Use | Urban grids, Industrial | Urban grids, Industrial | Space-constrained critical systems |
Selection and Purchase Guidance
When selecting the XGN66-12 Ring Main Unit, consider the following:
- Voltage and Current Requirements
- Grid Configuration Needs (single/double bus)
- Short-circuit withstand capacity based on network protection requirements
- Installation Space Constraints
- Automation and Remote Monitoring Capabilities
Consulting with expert manufacturers like PINEELE ensures that the selected switchgear configuration aligns with both technical specifications and project-specific needs.
Frequently Asked Questions (FAQ)
The XGN66-12 offers high fault tolerance, compact size, and flexibility in bus configurations, making it ideal for automated and resilient medium-voltage networks.
Yes, the modular design allows customization in terms of current rating, bus system type, and operation methods to suit different industrial needs.
With proper installation and minimal maintenance, the XGN66-12 RMU can achieve a service life exceeding 30 years, providing reliable performance throughout its lifecycle.
Through advanced engineering, robust design, and a focus on operational safety and efficiency, PINEELE’s XGN66-12 Ring Main Unit delivers exceptional value and performance for medium-voltage power distribution networks.