HXGN15‑12(SF6) 12kV Unit‑Type AC Metal‑Enclosed SF6 Ring Main Unit RMU
HXGN15‑12(SF6) unit‑type AC metal‑enclosed ring main unit (RMU) is a new‑generation high‑voltage switchgear. Developed on the basis of international advanced technology, it is specially designed for rural power‑grid construction and urban network renovation projects. All technical indicators meet IEC 62271‑200:2003 and GB 3906 standards.
The main switch, operating mechanism and core components can adopt original HAD/US‑series SF6 load‑switch modules.
The cabinet frame is assembled by CNC‑machined steel plates with riveted structure, reaching IP3X protection rating. Equipped with robust mechanical interlock system to prevent mis‑operation.
This ring‑main‑unit features small footprint, light weight, neat appearance, convenient operation, long service life, excellent electrical parameters, zero pollution and low‑maintenance requirements.
It is applied in 50Hz, 12kV AC power‑distribution networks, acting as power receiving & distribution equipment, with SF6 gas‑insulated load switch as its primary switching component.
Urban & rural ring‑network distribution substations
Old‑city power‑grid renovation projects
Residential communities & commercial complex power supply
Box‑type compact substation supporting equipment
Industrial park & factory power‑distribution systems
New‑energy photovoltaic and wind‑power collection stations
- Ambient temperature range:‑25℃ ~ 40℃
- Altitude: ≤ 2000 m ‑ Daily‑average relative humidity ≤ 95%, monthly‑average relative humidity ≤ 90% ‑ Surrounding air free from corrosive, flammable gas, water‑vapor and heavy pollution ‑ No frequent violent vibration at installation‑site
| Code | H | X | G | N | 15‑12 | SF6 |
|---|---|---|---|---|---|---|
| Meaning | Switchgear | Indoor | Fixed‑type | Ring‑network cabinet | Design No. / Rated Voltage 12kV | Main‑switch medium: SF6 gas |
- CNC precision‑processed riveted cabinet body, IP3X protection grade, solid mechanical strength
- Complete 5‑interlock safety system, reliable anti‑mis‑operation protection for operators
- Main circuit adopts SF6 load‑switch, excellent arc‑quenching & insulation performance
- Modular unit‑type design, cabinets can be freely combined for ring‑network topology
- Simple mechanical operation, manual switching, low‑failure rate, long equipment life
- Low maintenance workload, pollution‑free operation, environmentally friendly
- Customizable inlet‑outlet cable layout to adapt to different site requirements
| Item | Unit | Parameter |
|---|---|---|
| Rated Voltage | kV | 12 |
| Rated Frequency | Hz | 50 |
| Rated continuous current (busbar / fuse) | A | 630, 125 |
| Short‑time withstand current (main & earthing circuit, 4s) | kA | 20 |
| Peak withstand current (main & earthing circuit) | kA | 50 |
| Rated short‑circuit making‑current (main & earthing circuit) | kA | 50 |
| Operation times for load switch | times | 100 |
| Rated breaking‑current of fuse | kA | 31.5 / 40 |
| Rated ring‑closing current | A | 630 |
| Rated transfer‑switching current | A | 1600 |
| Mechanical endurance life | times | 2000 |
| 1‑min power‑frequency withstand voltage (phase‑to‑earth / isolating port) | kV | 42 / 48 |
| Lightning impulse withstand voltage (phase‑to‑earth / isolating port) | kV | 75 / 85 |
| 1‑min power‑frequency withstand voltage for secondary circuit | kV | 2 |
| Cabinet protection class | IP3X |
