| Brand | ROCKWILL |
| Model NO. | SF6 Gas Insulated ring main unit for MV Distribution Network-12kV |
| Rated voltage | 12kV |
| Rated frequency | 50/60Hz |
| Series | XGN |
XGN15-12 SF6 gas insulated ring main unit is a compact metal-enclosed switchgear for 12kV medium-voltage distribution networks. It provides technical solutions for ring-network and dual-radial power supply systems, and can also serve as terminal supply with control and protection for electrical energy, suitable for box-type substations.
The switchgear features mechanical interlocks preventing load switch operation when the earthing switch is closed, and preventing enclosure access with the earthing switch in the closed position. Sensing technology and modern protection relays make it suitable for demanding environments such as hospitals and airports.
| Rated voltage | 12 kV |
| Rated frequency | 50/60 Hz |
| Rated current | 630 A |
| Rated short-time withstand current | 20 kA / 3 s |
| Rated peak withstand current | 50 kA |
| Power frequency withstand voltage (1 min) | 28 kV (phase-to-earth/between phases) |
| 32 kV (across isolating distance) | |
| Lightning impulse withstand voltage (peak) | 75 kV (phase-to-earth/between phases) |
| 85 kV (across isolating distance) | |
| Degree of protection (gas chamber) | IP67 |
| Degree of protection (enclosure) | IP3X |
Suitable altitude: ≤2000m
Temperature: -40℃ ~ +55℃
Humidity: daily mean ≤ 95%, monthly mean ≤ 90%
Seismic withstand: ≤ Level 8
Yes. The XGN15-12 includes SF₆ leakage monitoring as part of its comprehensive safety system. Combined with a fully sealed gas chamber, it provides continuous gas integrity monitoring for safe operation.
Yes. The fully sealed gas chamber is dust-proof, moisture-proof, and corrosion-resistant, requiring no routine maintenance throughout the designed service life. SF₆ gas is recyclable, reducing environmental impact and operating costs.
The XGN15-12 supports multiple MV distribution connection schemes, including ring-network, dual-radial, and terminal supply configurations. This flexibility accommodates diverse grid layouts and expansion requirements.
Yes. The compact metal-enclosed design makes it specifically suitable for box-type substations, as well as space-constrained MV substations and high-rise buildings. The small footprint optimizes installation in urban and densely populated areas.
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