📌 Product Name
HXGN-12/125-31.5 Type Metal-Enclosed Ring Main Unit (Indoor Type)
1. Product Definition
The HXGN-12/125-31.5 type metal-enclosed ring main unit is a compact medium-voltage power distribution device with a rated voltage of 12kV, rated current of 125A, and rated short-circuit breaking current of 31.5kA. Adopting a fixed design, it is suitable for various power distribution scenarios such as ring network power supply and terminal power supply, especially for urban power grid transformation and industrial and mining enterprise power distribution systems.
2. Core Features
- Compact Structure: Metal-enclosed box structure with small footprint, ideal for space-constrained locations
- High Reliability: Combination of load switch and fuse provides comprehensive protection
- Easy Operation: Three-position load switch with intuitive operation status display
- Safety Protection: Complete mechanical interlocks meeting “five-prevention” requirements
- Modular Design: Flexible expansion to meet different wiring scheme requirements
3. Main Structural Components
| Component | Function Description |
|---|---|
| Cabinet | Divided by partitions into busbar compartment, switch compartment, cable compartment, and instrument compartment |
| Main Switch Unit | Three-position load switch (switch-on – switch-off – grounding) |
| Protection Unit | High-voltage current-limiting fuse (used in conjunction with load switch) |
| Operating Mechanism | Manual spring energy storage operating mechanism |
| Monitoring Instruments | Live-line indicator, fault indicator, etc. |
| Interlocking Device | Mechanical interlock to ensure operational safety |
4. Technical Parameters
| Item | Parameter |
|---|---|
| Rated Voltage | 12kV |
| Rated Current | 125A |
| Rated Short-Circuit Breaking Current | 31.5kA (fuse protection) |
| Rated Short-Time Withstand Current | 20kA/2s |
| Rated Peak Withstand Current | 50kA |
| Protection Grade | IP3X |
| Mechanical Life | ≥2000 cycles |
| Electrical Life | ≥100 cycles |
5. Application Scenarios
- Urban Power Grid: Ring network power supply systems, cable branch boxes
- Industrial and Mining Enterprises: Power distribution stations, workshop substations
- Infrastructure: Important locations such as airports, subways, and hospitals
- New Energy: Collection systems for photovoltaic power stations and wind farms
- Real Estate: Power distribution for commercial complexes and residential communities
6. Product Advantages
- Cost-Effective: Lower cost than circuit breaker cabinets with simple maintenance
- Safe and Reliable: Fast-acting fuse protection with high reliability
- Easy Installation: Pre-assembled and tested at the factory for quick on-site installation
- Strong Adaptability: Adaptable to various wiring schemes (ring network, dual power supply, etc.)
- Energy-Efficient and Environment-Friendly: SF6-free, meeting environmental protection requirements
7. Executive Standards
- GB/T 3906 “3.6kV～40.5kV AC Metal-Enclosed Switchgear and Controlgear”
- GB/T 11022 “Common Technical Requirements for High-Voltage Switchgear and Controlgear Standards”
- DL/T 404 “3.6kV～40.5kV AC Metal-Enclosed Switchgear and Controlgear”
8. Optional Configurations and Expansion Modules
- Smart electric meter / power quality analysis module
- RS485 communication interface (Modbus protocol)
- PLC controller, touch screen intelligent monitoring system
- UPS or diesel generator linkage interface
- Temperature and humidity sensor, heating and dehumidification device
- Leakage monitoring, fault indicator
9. Packaging and Delivery
- 100% electrical performance testing before leaving the factory
- Provide installation instructions, electrical schematics, and qualification certificates
- Standard wooden box packaging, suitable for long-distance transportation
- Delivery cycle: 15～20 working days for standard configuration; please inquire separately for customized products
10. Installation and After-Sales Service
- Attached with installation guide, supporting remote video or on-site technical guidance
- Warranty period: 12 months
- Service method: Provide 7×24-hour technical support, support regular inspection and parts replacement
- Support OEM/ODM mass customization
11. Selection Suggestions and Precautions
1. System Parameter Matching:
- Confirm whether parameters such as rated current and short-circuit current meet system requirements
- Consider future expansion needs
2. Environmental Conditions:
- Normal operating environment: -25℃～+40℃
- Special environments (high humidity, high altitude, etc.) require special design
3. Functional Configuration:
- Optional accessories such as live-line indicators and fault indicators according to requirements
- Consider whether automation interfaces are needed
4. Installation Method:
- Ensure good ventilation for indoor installation
- Choose models with higher protection grades for outdoor installation
Note: This product can be configured with load switches from different brands (such as FLN36, FKN12, etc.) according to user requirements, and various configuration options are available. It is recommended to provide detailed system parameters and usage environment information to obtain the optimal configuration solution. Customized solutions can be provided for special requirements (such as full insulation, intelligentization, etc.).
