XGN15-12 12kV SF₆ Ring Main Unit (RMU) with Incoming Metering & Outgoing Feeder
The XGN15-12 SF₆ Ring Main Unit (RMU) is a compact metal-enclosed medium-voltage switchgear designed for 12kV AC 50Hz power distribution systems. Featuring an SF₆-insulated load break switch, it provides reliable switching, protection, isolation, and distribution for secondary distribution networks.
With its modular design, compact footprint, and maintenance-friendly structure, the XGN15-12 RMU is widely used in utility substations, industrial plants, commercial buildings, renewable energy projects, airports, hospitals, and urban distribution networks. Manufactured in accordance with international standards, it offers excellent operational safety, high reliability, and long service life.
- Compact metal-enclosed switchgear
- Rated voltage: 12kV
- SF₆ gas-insulated load break switch
- Modular design for flexible configurations
- Complete five-prevention mechanical interlocking system
- High switching reliability
- Long mechanical endurance
- Low maintenance requirements
- Easy installation
- OEM & ODM customization available
The XGN15-12 SF₆ Ring Main Unit is engineered for safe and efficient medium-voltage power distribution. Designed for cable ring networks and terminal substations, it integrates incoming, outgoing, protection, and metering functions into a compact switchgear solution.
Its fully enclosed SF₆ load break switch provides excellent insulation and switching performance while reducing maintenance requirements. The modular cabinet structure allows flexible combinations to meet different project requirements, making it suitable for both new installations and distribution network upgrades.
The cabinet is manufactured from high-quality galvanized steel with precision CNC processing, ensuring excellent corrosion resistance and mechanical strength. The integrated safety interlocking system effectively prevents incorrect operating sequences, significantly improving operator safety.
Designed for continuous operation under demanding environmental conditions, the XGN15-12 RMU provides reliable performance in utility distribution systems, industrial facilities, renewable energy projects, and commercial infrastructure.
| Parameter | Unit | XGN15-12(F)/630-20 | XGN15-12(F.R)/T125-31.5 |
|---|---|---|---|
| Rated Voltage | kV | 12 | 12 |
| Rated Current | A | 630 | 125 |
| Rated Frequency | Hz | 50 | 50 |
| Power Frequency Withstand Voltage (1 min) | kV | 42 / 48 | 42 / 48 |
| Lightning Impulse Withstand Voltage | kV | 75 / 85 | 75 / 85 |
| Rated Active Load Breaking Current | A | 630 | — |
| Rated Closed-Loop Breaking Current | A | 630 | — |
| Rated Short-Circuit Making Current (Peak) | kA | 50 | 80 |
| Rated Peak Withstand Current | kA | 50 | 50 |
| Rated Short-Time Withstand Current | kA | 20 | 20 |
| Short-Time Withstand Duration | s | 4 | 4 |
| Rated SF₆ Gas Pressure (20°C) | MPa | 0.04 | 0.04 |
| Main Circuit Resistance | μΩ | ≤200 | ≤400 |
| Mechanical Endurance (Load Break Switch / Earthing Switch) | Operations | 5000 / 3000 | 5000 / 3000 |
| Rated Short-Circuit Breaking Current | kA | 20 / 50 | 31.5 / 50 |
| Rated Transfer Current | A | — | 1750 |
| Protection Class | — | IP4X | IP4X |
The XGN15-12 SF₆ Ring Main Unit is engineered for dependable operation in 12kV medium-voltage distribution systems. With a rated current of 630A, a 20kA short-time withstand current, and a 50kA peak withstand current, it delivers outstanding electrical performance under demanding operating conditions. The fully enclosed SF₆ load break switch enhances insulation reliability, while the IP4X enclosure offers effective protection for indoor installations. Its modular design also enables easy maintenance and future expansion.
Space-saving construction makes installation easy in compact substations and electrical rooms.
Sealed SF₆ switching technology ensures stable electrical performance and long-term operational reliability.
Supports multiple feeder configurations for different distribution network requirements.
Complete mechanical interlocking prevents incorrect operation and enhances operator protection.
The enclosed switchgear design minimizes maintenance requirements and reduces operating costs.
High-quality components and precision manufacturing ensure dependable long-term performance.
- Utility Distribution Networks
- Ring Main Distribution Systems
- Secondary Substations
- Industrial Manufacturing Plants
- Commercial Buildings
- Shopping Centers
- Hospitals
- Airports
- Wind Farms
- Solar Power Plants
- Infrastructure Projects
- Residential Communities
The XGN15-12 SF₆ Ring Main Unit is manufactured in accordance with relevant IEC and industry standards for medium-voltage switchgear, ensuring safe, reliable, and consistent performance in power distribution applications. Technical documentation and test reports can be provided upon request to support project specifications and tender requirements.
Changyun Intelligent is a professional manufacturer specializing in medium-voltage power distribution equipment. Our product portfolio includes Ring Main Units (RMUs), Vacuum Circuit Breakers (VCBs), SF₆ Load Break Switches, eco-friendly gas-insulated switchgear, and related components.
We provide:
- OEM & ODM manufacturing
- Factory-direct pricing
- Strict quality inspection
- Professional engineering support
- Fast production and delivery
- Global export experience
- Complete after-sales service
The XGN15-12 is a compact 12kV medium-voltage Ring Main Unit designed for switching, protection, and distribution in secondary power distribution systems.
It offers a compact design, reliable SF₆ insulation, modular configuration, low maintenance, high operational safety, and long mechanical service life.
It is widely used in utility substations, industrial facilities, commercial buildings, renewable energy projects, and urban distribution networks.
The standard rated voltage is 12kV AC, 50Hz.
Yes. We provide OEM and ODM solutions, including customized panel layouts, branding, busbar configurations, electrical schemes, and accessories.
The product is manufactured according to relevant IEC and medium-voltage switchgear standards. Technical documentation and test reports are available upon request.
The load break switch is designed for up to 5,000 mechanical operations, ensuring reliable long-term performance under normal operating conditions.
Yes. Technical datasheets, factory test reports, and available type test reports can be provided for project evaluation and tender requirements.
The standard lead time is 15–30 days, depending on order quantity and customization requirements.
We combine professional manufacturing, strict quality control, OEM & ODM capabilities, competitive pricing, and responsive technical support to provide reliable medium-voltage solutions for customers worldwide.
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