Modular Ring Main Unit for Power Distribution
Revolutionizing Medium Voltage Power Distribution Systems
Our Modular Ring Main Unit for Power Distribution combines advanced SF6-insulated technology with proven engineering excellence. Operating at 12kV, these units deliver exceptional performance with IP67 protection rating, ensuring complete dust and moisture resistance. With our 18 patented innovations, 120+ advanced production equipment sets, and ISO 9001 certified quality management, we've successfully deployed these units across 100+ major projects including Xuzhou Rail Transit and XCMG Group facilities. Each unit undergoes rigorous testing through our professional inspection laboratory, guaranteeing 25+ years maintenance-free operation.

What Makes Our Modular Ring Main Unit Stand Out?
Compact Yet Powerful Design
Your facility needs maximum performance with minimum footprint. Our Modular Ring Main Unit for Power Distribution reduces installation space by 60% compared to traditional switchgear.
Each unit features:
- Width: 400mm-1200mm
- Height: Under 2000mm
- Depth: 1000mm-1500mm
This compact design fits seamlessly into:
- Urban substations with limited space
- Industrial facilities requiring flexible layouts
- Commercial complexes with aesthetic constraints
Superior Safety Features
Your team's safety is paramount. Our units eliminate exposed live parts entirely.
Key safety advantages include:
- IP67 protection against dust and water
- Comprehensive pressure-relief channels
- Arc-resistant design meeting IEC 62271-200
- Fully sealed construction
- No external live components
Maintenance-Free Reliability
You deserve equipment that works without constant attention. Our modular units require virtually zero maintenance for their entire service life.
Benefits you'll appreciate:
- 25-30 year operational lifespan
- Stable SF6 insulating properties
- Sealed vacuum technology
- 99.9% availability rating
- Reduced operational costs
Technical Specifications
| Parameter |
Specification |
| Rated Voltage |
12kV (3.3kV-36kV available) |
| Insulation Type |
SF6 Gas Insulated |
| Protection Rating |
IP67 |
| Short-Circuit Capacity |
16kA-63kA |
| Operational Current |
630A-3150A |
| Operating Temperature |
-40°C to +40°C |
| Humidity Resistance |
Up to 95% RH |
| Maintenance Interval |
25+ years |
| System Availability |
99.9% |
| Noise Level |
<50dB at 1 meter |
Key Advantages for Your Operations
1. Fully Insulated and Sealed Protection
Your equipment faces constant environmental challenges. Our fully sealed design protects against:
- External dust and debris
- Moisture and humidity
- Small animals and insects
- Harsh industrial environments
The IP67 rating means complete peace of mind, even in the most demanding conditions.
2. Enhanced Personal Safety
You need to protect your maintenance teams. Our design ensures:
- Zero exposed live parts
- Safe operation and inspection
- Reduced arc flash hazards
- Comprehensive safety barriers
- Pressure-relief protection systems
3. Space-Saving Compact Structure
Your real estate is valuable. Our modular design:
- Saves up to 60% floor space
- Enables flexible configurations
- Supports future expansion
- Fits existing infrastructure
- Reduces installation costs
4. Zero Maintenance Requirements
You want to minimize operational disruption. Our units offer:
- No scheduled maintenance for 25+ years
- Stable gas insulation properties
- Sealed-for-life technology
- Predictive condition monitoring
- Reduced labor costs
Real-World Applications
Urban Power Distribution Networks
You're managing complex city infrastructure. Our units excel in:
- Underground substations
- Space-constrained installations
- High-density urban areas
- Municipal projects
Proven track record:
- Xuzhou Rail Transit Network Control Center
- Xuzhou High-speed Railway East Station
- Xuzhou New Health Hospital Phase I
Industrial Manufacturing Facilities
Your production can't afford downtime. We provide:
- Rapid fault isolation (<100ms)
- Arc-resistant designs (50kA rating)
- Power quality monitoring
- Continuous operation reliability
Successful installations:
- XCMG Group factory upgrades
- GCL Photovoltaic Industrial Park
- Huaihai Biomedical Industrial Park
- Electronic Industrial Park
Commercial and Residential Complexes
Your tenants demand uninterrupted power. Our solutions deliver:
- Silent operation (<50dB)
- Automatic load transfer
- Renewable energy integration
- 99.97% system availability
Project highlights:
- Xinhuai Central Complex
- Xuzhou Fantawild Adventure
- Zhongjun Huijingcheng
- Tianyu Yayuan (top quality assessment)

Quality Assurance You Can Trust
Comprehensive Testing Protocols
Every unit undergoes rigorous inspection:
Electrical Testing:
- Dielectric strength per IEC 62271-1
- Power frequency withstand voltage
- Lightning impulse verification
- 10,000 mechanical operations
- 100 full load interruptions
Environmental Qualification:
- Temperature cycling (-40°C to +60°C)
- 100 thermal cycles
- 95% humidity resistance (48 hours)
- Seismic testing per IEEE 693
- Vibration testing per IEC 60068-2-6
Gas Integrity:
- SF6 leakage rate <0.1% annually
- Vacuum leak testing
- Long-term seal verification
International Certifications
Your projects require documented compliance:
- ISO 9001 Quality Management
- ISO 14001 Environmental Management
- OHSAS 45001 Occupational Safety
- National CCC Certification
- IEC 62271-200 compliance
- RoHS environmental standards

Our Manufacturing Excellence
Advanced Production Capabilities
You need consistent, high-quality products. We deliver through:
Equipment: 120+ advanced machinery sets including:
- CNC automatic winding machines
- CNC static vacuum casting machines
- Automatic foil winding machines
- Microcomputer-controlled gradient curing furnaces
Technical Team:
- 15 senior engineers
- 30+ intermediate technicians
- 17 senior technicians
- 18 granted patents
Strict Quality Control
Your specifications matter. We implement:
- Zero defects philosophy
- Step-by-step monitoring
- Raw material inspection
- Production process control
- Finished product testing
- Pre-delivery verification

FAQ
Q: What's the expected service life?
You're making a long-term investment. Our modular units provide:
- 25-30 year operational lifespan
- Minimal maintenance requirements
- Vacuum circuit breaker inspection every 10 years
- SF6 gas analysis every 5 years
- Predictive maintenance alerts reducing unplanned outages by 60%
Q: How do these units perform in extreme conditions?
Your environment might be challenging. Our units handle:
- Temperature range: -40°C to +40°C (extendable to -50°C)
- Humidity: 95% relative humidity
- Coastal environments with salt spray
- Desert conditions with sand ingress
- Seismic zones (0.5g horizontal acceleration capability)
Q: What about environmental impact?
You're concerned about sustainability. We offer:
- Vacuum technology with zero greenhouse gas emissions
- SF6-free options available
- RoHS compliance
- 30+ year sealed operation
- Carbon footprint optimization
- Environmental certifications
Q: Can these integrate with existing systems?
Your infrastructure is already in place. Our units support:
- IEC 61850-compliant protection relays
- SCADA system integration
- Ethernet-based communications
- Real-time data acquisition
- Remote control capabilities
- Standardized communication protocols
Q: What makes your company different?
You have many suppliers to choose from. Our advantages include:
- 20+ years industry experience
- 18 patents demonstrating innovation
- 100+ major project completions
- Professional quality inspection laboratory
- One-stop power distribution solutions
- Customization for country-specific requirements
Q: How quickly can you deliver?
Your project timeline is tight. We provide:
- Factory pre-testing reducing commissioning time by 40-70%
- Accelerated installation timelines
- Proven on-time delivery track record
- Complete documentation packages
- Technical support throughout installation
Why Choose Xuzhou Tuojie International Trade?
Proven Track Record
You need a reliable partner. We've delivered:
- 100+ key power projects
- Municipal engineering excellence
- Commercial real estate solutions
- Industrial facility upgrades
- Consistent quality across all sectors
Comprehensive Service Approach
You deserve complete support:
- Customized product solutions
- Technical consultation
- Additional product procurement assistance
- Installation guidance
- After-sales service
- Lifetime technical support
Innovation-Driven Development
You benefit from our continuous improvement:
- 18 granted patents
- Ongoing R&D investment
- Advanced manufacturing technology
- Quality management system optimization
- Customer feedback integration

Contact Us
Ready to enhance your Modular Ring Main Unit for Power Distribution power distribution reliability? Reach out to discuss your specific requirements today. Email us at tuojie@electricinchina.com for customized solutions.