Introduction to HXGN17-12 ring main unit
The HXGN17-12 Ring Main Unit (RMU) is a compact and fully insulated medium-voltage switchgear solution engineered to enhance safety, reliability, and efficiency in electrical distribution networks up to 12kV. Designed by PINEELE, this RMU integrates cutting-edge vacuum switch technology with a fully enclosed structure, making it ideal for modern electrical infrastructure.
This switchgear is widely adopted in industrial facilities, city substations, commercial buildings, rail transport systems, and public utility networks—where uninterrupted power delivery and space-saving layouts are crucial.
Key Features of HXGN17-12 RMU
- Compact and Modular Design: The unit’s small footprint allows seamless installation in confined areas such as indoor substations or underground vaults.
- Reliable and Fully Sealed: It features a dustproof and moisture-resistant enclosure, making it suitable for harsh operating environments.
- High Operational Safety: Incorporates arc-resistant design and vacuum load switches to protect personnel and equipment.
- Flexible Power Distribution: Supports both ring and radial network configurations for diverse use cases.
- Extended Electrical Life: Built for long-term use with minimal maintenance, ensuring dependable performance over decades.
Environmental Working Conditions
To ensure optimal performance, the HXGN17-12 is designed for the following ambient and environmental conditions:
| Parameter | Specification |
|---|---|
| Ambient Temperature | -25°C to +40°C |
| Altitude | ≤ 1000 meters |
| Relative Humidity | Daily avg. ≤ 95%, Monthly avg. ≤ 90% |
| Seismic Resistance | Up to magnitude 8 |
| Environmental Restrictions | No fire, explosion risk, corrosive gases, or heavy pollution |
Technical Specifications
General Electrical Specifications
| Parameter | Unit | FN12-12 | FZN25-12 |
|---|---|---|---|
| Rated Voltage | kV | 12 | 12 |
| 1-Min Frequency Withstand Voltage | kV | 42 (to ground), 48 (isolation) | 42 (to ground), 48 (isolation) |
| Lightning Impulse Voltage (Peak) | kV | 75 / 85 | 75 / 85 |
| Rated Frequency | Hz | 50 | 50 |
| Rated Current | A | 630 | 630 |
| Electrical Life at Rated Current | Cycles | ≥100 | ≥100 |
| No-Load Transformer Capacity | kVA | 1250 | 1250 |
| Rated Stabilizer | kA/S | 20/4 (Earth: 20/2) | 20/4 (Earth: 20/2) |
| Rated Dynamic Stabilizing Current | kA | 50 | 50 |
| Rated Short Circuit Closing Current | kA | 50 | 50 |
| Fuse Rated Current | A | 125 | 125 |
| Rated Transfer Current | A | 870 | 870 |
| Rated Short-Circuit Opening Current | kA | 20 | 20 |
| Matching Fuse Type | — | S□LAJ-12 | S□LAJ-12 |
| Mechanical Life | Cycles | 2000 | 10000 |
| Aux. Circuit Withstand Voltage | kV | 2 | 2 |
| Electric Actuator Voltage | V | AC/DC 220, 110 | AC/DC 220, 110 |
| Protection Grade | — | IP2X | IP2X |
Installation Dimensions
The HXGN17-12 Ring Main Unit supports various configurations with standardized installation sizes to meet different site requirements:
| Width (mm) | Depth (mm) | Height (mm) |
|---|---|---|
| 600 | 900 | 2000 |
| 650 | 900 | 2000 |
| 700 | 900 | 2000 |
| 800 | 900 | 2000 |
System Structure and Components
The unit is built with multiple functional areas, each supporting safe operation and easy maintenance:
- Instrument Door – Hosts control meters and indicators
- Instrumentation Panel – Includes protection relays and metering devices
- DXN Display – Visualizes switchgear status
- Operating Mechanism – Manual or electric control module
- Lower Door – Provides service access
- Load Switch – Vacuum-based switchgear unit
- Cable Holder & Current Transformer – For cable management and monitoring
- Relay Compartment – Houses safety and logic relays
- Skeleton & Divider – Support and reinforce the entire enclosure
Ordering Information
To correctly configure and order the HXGN17-12 RMU, customers should provide:
- Main wiring diagram or configuration code
- Rated voltage and current parameters
- Required short-circuit handling capacity
- Detailed layout drawing or room plan
- Special environmental considerations (if applicable)
- Protection and control scheme preferences
- Customization requirements (if needed)
Application Areas
The HXGN17-12 is versatile and robust, suitable for a broad range of installations:
- Urban and rural electrical networks
- Solar farms and wind power generation
- Underground and container substations
- Railway stations and metro infrastructure
- Factories, warehouses, and mining sites
- Data centers and high-demand commercial buildings
Advantages of HXGN17-12 Ring Main Unit
- Compact footprint – Optimized for space-restricted environments
- Fully sealed and insulated – No exposure to environmental hazards
- Low maintenance – Operates reliably without regular servicing
- Quick installation – Modular design enables fast deployment
- Durability – High mechanical and electrical endurance
- Customizable – Suited for ring or radial network topologies
- Enhanced safety – Arc-resistant construction with intelligent protection features
The HXGN17-12 Ring Main Unit is a next-generation switchgear that blends advanced safety, minimal maintenance, and scalability for medium-voltage power systems. Built by PINEELE, this RMU stands as a reliable solution for industries, utilities, and clean energy sectors looking to optimize power distribution without compromising on space or safety.
