| Brand | ROCKWILL |
| Model NO. | 13.2kV 12kV 14.5kV 15kV 21.9kV Solid insulation switchgear/Ring Main Unit direct supply |
| Rated voltage | 12kV |
| Rated frequency | 50/60Hz |
| Series | RSS |
Pioneer in China's eco-friendly switchgear sector, we have specialized in R&D and manufacturing of SF₆-free switchgear for decades. With core technologies, we have established industry standards. Boasting a fully independent end-to-end production chain, we have built a product matrix of zero-emission and high-reliability eco-friendly switchgear, making us a trusted choice for power grid construction.
13.2kV 12kV 14.5kV 15kV 21.9kV solid insulated switchgear is suitable for middle voltage power distribution system and rated current is 630A/1250A. It is more reliable than the SF6 ring main unit, and is more suitable for a wider range of applications in both of GB standard and IEC standard.
Features
Safety
All live parts are sealed or embedded in the epoxy resin and silicon rubber, fully insulated and wholly enclosed structure, safety protection level: IP67.
Enhanced phase separation design, independent phase insulation to avoid the fault between phases.
Switch working position of each phase could be observed independently, which improves operation safety.
Multi-environmental application
Applicable to low temperature areas, high altitude areas, high humidity areas, high corrosion areas, low-lying areas and explosion forbidden places.
Flexibility
Standard modular design to facilitate circuit extension, modification and replacement.
Feasible to any replacement in both circumstances of any unit in fault and according user needs.
Smaller dimension makes it more convenient to be moved, transported or replaced.
Environment-friendly
Epoxy resin is employed instead of SF6.
Parameter
The voltage classes of some of these eco-friendly switchgears include 6kV, 6.3kV, 6.6kV, 6.9kV, 7.2kV, 10kV, 10.5kV, 11kV, 11.5kV, 12kV, 13.2kV, 13.8kV, 14.5kV, 14.4kV, 15kV, 15.5kV, 15.6kV, 17.5kV, 20kV, 21.9kV, 22kV, 24kV, 30kV, 33kV, 33.5kV, 34.5kV, 35kV, 36kV, 38kV, 38.5kV, 40.5kV, 44kV, 45kV, 46kV, 66kV and 69kV. and customization is available.
Description |
Unit |
|
Rated voltage |
kV |
13.2kV 12kV 14.5kV 15kV 21.9kV |
Power frequency withstand voltage phase to phase/earth |
kV |
42 |
Power frequency withstand voltage Between open contacts |
kV |
48 |
Impulse withstand voltage phase to phase/earth |
kV |
75 |
Impulse withstand voltage Between open contacts |
kV |
85 |
Rated frequency |
Hz |
50 |
Rated current |
A |
630 |
Rated short-time withstand current (4s) |
kA |
20/25 |
Rated peak withstand current |
kA |
50/63 |
Rated active load breaking current |
A |
630 |
Rated closed loop breaking current |
A |
630 |
Mechanical lifetime |
Ops |
10000 |
Environmental Conditions
Altitude: ≤2200 m (Enhanced insulation type extendable to 3000 m)
Ambient Temperature: -20 ℃ to +45 ℃ (Short-term overload operation at ≤+55 ℃ for ≤3 hours within 24 hours is permissible)
Relative Humidity: Daily average ≤92%, monthly average ≤82% (Condensation-free and conductive-dust-free environment)
Solid insulated RMU uses epoxy resin to completely encapsulate all high-voltage live parts, including vacuum interrupters and conductive circuits. Unlike SF₆ gas-insulated switchgear (GIS), it contains no greenhouse gases and eliminates risks of gas leakage or liquefaction. Compared to air-insulated switchgear (AIS), it is more compact, fully sealed, and immune to dust, humidity, and pollution, offering superior safety and reliability in harsh environments.
Yes. The RMU does not use SF6 gas, which has a Global Warming Potential (GWP) 23,500 times that of CO2. By eliminating SF6, it fully complies with the EU F-gas Regulation and global environmental directives, while producing no toxic byproducts during operation or end-of-life disposal.
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