Eco-Friendly Medium-Voltage Distribution Core
Kechang's eco-friendly gas-insulated RMU is designed for 10kV–24kV medium-voltage grids. Unlike traditional SF6 units, it uses zero-GHG emission insulating gas (with insulation and arc-extinguishing performance equivalent to SF6, GWP near zero), complying with IEC 62271, State Grid standards and global low-carbon policies. It integrates distribution, protection and control functions, suitable for urban power grids, commercial complexes and renewable energy systems that value environmental protection and reliability.
Zero-GHG Emission Insulating Gas
Instead of SF6, the RMU adopts zero-GHG insulating gas. Its performance matches SF6, while its GWP is nearly zero. The sealed gas chamber uses precision welding, with an ultra-low annual leakage rate of ≤0.05%, ensuring stable operation for over 30 years without gas replenishment, meeting EU F-Gas Regulation requirements.
Space-Saving Modular Structure
Optimized for narrow spaces (e.g., urban roadside cabinets, basement electrical rooms), its modular design combines switches into a compact gas-insulated chamber, reducing footprint by 40% vs traditional air-insulated RMUs. Standardized plug-and-play design cuts on-site construction time by 50% and supports flexible expansion.
Gas Density Real-Time Tracking
To ensure operational safety, the RMU is equipped with a gas density real-time tracking system with high-precision sensors. The system continuously monitors the pressure and temperature of the insulating gas, automatically calibrating data to standard conditions for accurate leak detection. When gas density drops below the threshold, it triggers local audible and visual alarms and sends remote notifications to the control center, while locking the operating mechanism to prevent unsafe operations. This intelligent design eliminates blind spots in equipment monitoring and supports predictive maintenance.
Low-Cost Maintenance Advantage
The sealed gas chamber and high-reliability components minimize maintenance. Zero-GHG gas needs no regular replacement, and pre-tested modular parts reduce on-site maintenance workload by over 80%. Core switches have a mechanical life of ≥20,000 operations, cutting long-term operational costs and carbon footprint.
How to choose environmentally friendly gas insulated ring mesh cabinet?
When choosing an environmentally friendly insulated ring mesh cabinet, the key is to understand how to balance environmentally friendly performance, insulation capabilities, spatial scenarios and reliability in different application scenarios. Below, I will introduce a few key methods, I hope it can give you reference.
1. Environmentally friendly gas types: The main types of gases include dry air, nitrogen and gas mixed gases. These gases have no pollution to the atmospheric environment and no greenhouse effect. Only attention needs to be paid to whether the insulation strength under characteristic pressure meets the project requirements.
2. Structural design and process: It is necessary to pay attention to the sealing process of the air box, and give priority to robot laser welding technology to ensure low leakage rate, structural strength of the cabinet and simulation distribution design of electric field and other technologies.
3. Key Parameters and Performance: It is necessary to pay attention to whether the parameters rated voltage and rated current meet the grid matching, whether the insulation level meets the national standards, and the protection level usually requires IP67 protection level.
4. Monitoring and operation and maintenance: Whether an intelligent module has been added, equipped with high-precision sensor configuration and remote data monitoring capabilities, which can significantly improve operation and maintenance efficiency and reduce the frequency of manual inspections.
5. Standards and Certification: Comply with national environmental protection standards and specifications, provide type test report, prove whether the inspection of the product is strict.
Our advantages
1. Using 99.99% purity nitrogen, high insulation strength, in line with environmental protection requirements.
2. 2.5 mm steel plate laser welding technology is used. Cabinet protection class IP67
3. Insulation level to industry leading level
4. It can be intelligently remote data center monitoring and mobile phone remote monitoring
5. With type test report
6. Schneider Electric China partner, passed the acceptance
Product Specifications
| Project | Unit | Circuit Breaker | Load Switch | Load Switch - Fuse Combinations | |
| Rated Voltage | kV | 12 | 12 | 12 | |
| Rated Frequency | A | 630/1250 | 630 | 125 | |
| Rated Current | Hz | 50 | 50 | 50 | |
| Rated Insulation Level | 1 min Power Frequency Withstand Voltage (Interphase and Phase to Ground) | kV | 12 | 42 | 42 |
| 1 min Power Frequency Withstand Voltage (Isolating Distance) | 48 | 48 | 48 | ||
| Rated Power-frequency Withstand Voltage (Control and Auxiliary Circuit) | 2 | 2 | 2 | ||
| Rated Lightning Impulse (between Phases, to Earth) | 75 | 75 | 75 | ||
| Rated Lightning Impulse (Across the Isolating Diatance) | 85 | 85 | 85 | ||
| Rated Filling Pressure (Gauge Pressure When Temperature is 20℃) | Mpa | 0.02 | |||
| Minimum Functional Pressure (Gauge Pressure When Temperature is 20℃) | Mpa | 0 | |||
| Pressure Relief Device Release Pressure (Gauge Pressure When Temperature is 20℃) | Mpa | 0.16 | |||
| Yearly Gas Leakage Rate | - | ≤0.01% | |||
| Mechanical Life | Times | 10000 | |||
| Main Loop Resistance | μΩ | ≤150 | |||
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