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JLHC-12 Series Environmentally Friendly Gas Insulated Ring Main Unit
• 6kV / 10kV distribution applications• Modular and flexible configuration• Fixed and expandable unit options• Fully sealed, maintenance-free design
Key Features
• 6kV / 10kV distribution applications
• Modular and flexible configuration
• Fixed and expandable unit options
• Fully sealed, maintenance-free design
• High reliability in harsh environments
• Expandable busbar for easy extension
• Safe insulated and shielded structure
• Smart grid and automation ready
• Easy installation and commissioning
Main Technical Parameters
| Technical Specifications | Unit | Data | |
|---|---|---|---|
| Rated voltage | kV | 12 | |
| Rated frequency | Hz | 50 | |
| Rated current | A | 630 | |
| Rated short-circuit breaking current | kA | 20 | |
| Rated short-circuit making current | kA | 50 | |
| Rated short-time withstand current and duration (4s) | kA | 20 | |
| Rated peak withstand current | kA | 50 | |
| Insulation test voltage | 1-minute power frequency withstand voltage | kV | 42 |
| Lightning impulse withstand voltage | kV | 85 | |
| Main circuit resistance | μΩ | ≤150 | |
| Minimum operating pressure/rated operating pressure of environmentally friendly gas (20℃/gauge pressure) | Mpa | 0.02~0.03 | |
| Mechanical life | Times | 10000 | |
| Electrical life | Class | E2 | |
| Internal arc class | kA/s | 10/1 | |
| Annual gas box leakage rate | V/V | ≤0.1% | |
| Protection level: cabinet/gas box | / | IP4X/IP67 | |



