The Vni(XGN)□-12 series SF₆ gas-insulated RMU features a high-quality 3mm thick stainless steel gas tank. The stainless steel sheets are precisely laser-cut and automatically welded by robotic arms, ensuring excellent gas tightness. The gas tank is filled with SF₆ gas and undergoes simultaneous vacuuming and leakage detection. Key switching components such as load switches, earthing switches, fuse barrels, and busbars are fully sealed inside the tank, which achieves a protection rating of IP67.
Immune to external environmental factors: resistant to condensation, frost, salt spray, pollution, corrosion, UV radiation, and chemicals.
All live and switching components are fully sealed in an SF₆-filled stainless steel enclosure, delivering a compact, lightweight, and fully insulated system.
Modular design: customizable configurations to support various circuit schemes.
Silicone rubber connectors for flexible plug-in of HV components and cabinet expansion.
Fully shielded cable entry and exit; vacuum circuit breaker options available.
Optional digital protection relays, remote control, and SCADA monitoring units.
Optional overcurrent protection, excellent flood resistance, long service life, maintenance-free operation, and compatible with automated distribution upgrades.
| Function Unit | Load Switch | Load-Fuse Combination | Vacuum Circuit Breaker | Isolator / Earthing Switch |
|---|---|---|---|---|
| Rated Voltage (kV) | 12 / 24 | 12 / 24 | 12 / 24 | 12 / 24 |
| Power Frequency Withstand Voltage (kV) | 42 / 65 | 42 / 65 | 42 / 65 | 42 / 65 |
| Lightning Impulse Voltage (kV) | 75 / 125 | 75 / 125 | 75 / 125 | 75 / 125 |
| Rated Current (A) | 630 / 630 | Based on fuse rating | 630 / 630 | — |
| Breaking Capacity | ||||
| - Loop current (A) | 630 / 630 | |||
| - Cable charging current (A) | 135 / 135 | |||
| - Active load 5% breaking (A) | 31.5 / — | |||
| - Fault making capacity (A) | 200 / 150 | |||
| - Cable charging under fault (A) | 115 / 87 | |||
| Short-Circuit Breaking Current (kA) | — | Limited by fuse | 20 / 16 | — |
| Making Capacity (kA) | 63 / 52.5 | Limited by fuse | 50 / 40 or 63 / 50 | 50 / 40 |
| Short-Time Withstand Current (3s) kA | 25 / — | — | 20 / 16 | 20 / 16 |
| Short-Time Withstand Current (4s) kA | — / 21 | — | 20 / 16 | 20 / 16 |
| Mechanical Life (operations) | Load 5000 / Earthing 3000 | Same | 10,000 | Isolator 3000 / Earthing 3000 |
Note: Fuse ratings determine current limits. Values in brackets refer to 800A, 24kV configurations.
Complies with IEC62271-100/102/103/105/200, GB/T11022-1999, GB3906-2006, GB1985-2004, GB16926, GB3804-2004, GB1984-2003, GB3309-89.
The Vni(XGN)□-12 gas-insulated RMU is ideal for industrial and commercial ring network systems and terminal power distribution. Its compact design, full insulation, and sealed structure make it perfect for small secondary substations, switching stations, mines, airports, railways, residential complexes, highways, subways, tunnels, and more.
| Parameter | Value |
|---|---|
| Altitude | ≤ 1500m (at standard gas pressure) |
| Ambient Temperature | Max +40°C / Avg (24h) +35°C / Min -40°C |
| Humidity | ≤95% (24h avg) / ≤90% (1-month avg) |
| SF₆ Gas Pressure | 1.4 bar at 20°C (absolute) |
| Annual Gas Leakage Rate | ≤ 0.25‰ / year |
| Arc Fault Test | With arc chamber: 20kA 1s / Without: 16kA 1s |
| Immersion Test | 0.3 bar water pressure at 24kV, 24 hours |
| Cable Bushing Standard | DIN47636T1, T2 / EDF HN 525-61 |
| Protection Degree | SF₆ Tank: IP67 / Fuse Tube: IP67 / Enclosure: IP3X |
