Introduction to the PINEELE XGN2-12 ring main unit (RMU)
The PINEELE XGN2-12 Ring Main Unit (RMU) is a cutting-edge, metal-enclosed, air-insulated switchgear solution designed for 12kV three-phase AC 50Hz power distribution systems. Engineered for environments with frequent operations, this Ring Main Unit integrates advanced vacuum circuit breakers and rotating isolation switches to deliver exceptional electrical performance, safety, and reliability.
Meeting both national (GB3906) and international (IEC298) standards, the PINEELE XGN2-12 RMU boasts an IP4X protection rating, making it a top-tier choice for indoor medium-voltage applications. Its robust mechanical interlocking and superior insulation technology make it a versatile and dependable option for modern power distribution networks.
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Key Features of the PINEELE XGN2-12 Ring Main Unit
- Modular Flexibility
The Ring Main Unit offers a modular and expandable design, utilizing sulfur hexafluoride (SF₆) insulation for key components and air insulation for other sections. Its compact footprint is ideal for urban power grids, industrial facilities, and critical infrastructure. - Advanced Switching Mechanisms
Equipped with options such as the ZN28A-12 segmental vacuum circuit breaker, ZN28-12 integral vacuum breaker, or ZN63-12 (VS1) breaker, paired with CD17/CD10 electromagnetic or CT17/CT19 spring mechanisms. Isolation switches feature GN30-10 rotating or GN22-10 high-current technologies. - High-Level Protection
This RMU incorporates mechanical interlocking across doors, grounding switches, and circuit mechanisms, adhering to the “Five-Prevention Safety” standard for maximum operational security.
Operating Conditions and Technical Specifications of the Ring Main Unit
Operating Conditions for the PINEELE XGN2-12 RMU
The PINEELE Ring Main Unit is built to thrive in demanding environments, with the following operational parameters:
- Ambient Temperature: -25℃ to +40℃
- Altitude: ≤1000m
- Humidity: ≤95% daily average, ≤90% monthly average
- Vapor Pressure: ≤2.2×10³ MPa
- Seismic Resistance: ≤8 degrees
- Installation Site: Free from fire hazards, explosive risks, severe pollution, chemical corrosion, or excessive vibration
Technical Specifications Table
| Item | 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 |
| Rated Frequency Withstand Voltage | kV | 42/48 | 42/48 |
| Rated Impulse Withstand Voltage | kV | 75/85 | 75/85 |
| Rated Active Load Breaking Current | A | 630 | — |
| Closed-Loop Distribution Circuit Current | A | 630 | — |
| Short-Circuit Making Current (Peak) | kA | 50 | 80 |
| Peak Withstand Current | kA | 50 | 50 |
| Short-Time Withstand Current | kA | 20 | 20 |
| Short Circuit Duration | s | 4 | 4 |
| Rated SF₆ Gas Pressure (20°C) | MPa | 0.04 | 0.04 |
| Loop Resistance | µΩ | ≤200 | ≤400 |
| Mechanical Endurance (LBS/Earthing) | Cycles | 5000/3000 | 5000/3000 |
| Short-Circuit Breaking Current | kA | 20/50 | 31.5/50 |
| Transfer Current | A | — | 1750 |
| Protection Degree | — | IP4X | IP4X |
Structural and Functional Highlights of the Ring Main Unit
- Metal-Enclosed Structure
The PINEELE Ring Main Unit features a fully enclosed metal cabinet with IP2X/IP4X protection, safeguarding against accidental contact and foreign material ingress. - High Insulation Integrity
With porcelain support insulators (≥8000N) and a minimum insulation distance of 125mm, this RMU ensures superior dielectric strength and operational stability. - Smart Grid Readiness
Built-in sensor compatibility and protective relays enable real-time monitoring and remote control, making it a future-ready solution for digital substations.
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Industry-Leading Advantages of the PINEELE Ring Main Unit
- Meets GB3906 and IEC298 standards
- Offers flexible breaker configurations for diverse applications
- Combines SF₆ and air insulation for a compact, safe design
- Provides protection against seismic activity, humidity, and pollution
- Supports smart and sustainable grid infrastructure
Frequently Asked Questions (FAQ)
- What makes the PINEELE XGN2-12 Ring Main Unit ideal for urban distribution networks?
Its compact, modular design fits seamlessly into space-constrained urban environments. The SF₆ insulation and maintenance-free structure lower installation and operational costs. - Can the PINEELE RMU be integrated into smart grid systems?
Yes, the Ring Main Unit includes sensor interfaces and intelligent relays, enabling automation, remote diagnostics, and predictive maintenance for smart grid compatibility. - How does the PINEELE Ring Main Unit ensure operational safety?
Safety is ensured through mechanical interlocks, IP-rated enclosures, and adherence to the five-prevention logic, preventing unsafe actions like operating live circuits.
