| Brand | ROCKWILL |
| Series | RMR，REC |
Medium-voltage metal-enclosed switchgear insulated by conditioned air, built for primary distribution networks. No SF6, no fluorinated gas, with sealed vacuum circuit breakers for clean, dependable protection of incoming and feeder circuits.
Metal-enclosed MV switchgear where the high-voltage compartment is insulated by conditioned air rather than SF6, engineered for primary distribution — the upstream part of the network feeding secondary rings.
Primary air insulated switchgear uses conditioned air for phase-to-earth and phase-to-phase insulation, while a sealed vacuum circuit breaker handles current interruption. The panels are built for the higher reliability demands of primary networks — incomers, feeders, metering and bus-tie — and are type-tested to IEC 62271-200. With no SF6 sealed in, the switchgear has zero global-warming potential and no fluorinated-gas compliance burden.
Conditioned air provides clean, breathable, non-toxic insulation with zero GWP.
Sealed vacuum circuit breakers handle load, fault and transformer currents independently of the gas.
Type-tested withstand levels for the reliability demands of primary distribution networks.
No fluorinated gas — zero GWP and no F-gas reporting or recovery at end of life.
Air does not displace oxygen; no asphyxiation risk in switchrooms and cable areas.
No gas-density top-ups; sealed vacuum parts and condition monitoring keep service simple.
Sealed construction and vacuum breakers designed for decades of primary-network duty.
Steel enclosure and copper busbar recycle as standard materials at end of life.
Panels built to your one-line diagram and brand, with IEC 62271 documentation for tenders.
Representative values; the certified datasheet is prepared on request — contact us.
| Parameter | Typical value |
|---|---|
| Rated voltage | 12kV / 24kV (36kV on request) |
| Power frequency withstand | 50kV (1 min) |
| Lightning impulse withstand | 125kV |
| Rated frequency | 50 / 60 Hz |
| Insulation medium | Conditioned air — SF6-free, GWP 0 |
| Breaking device | Sealed vacuum circuit breaker |
| Rated normal current | 630A / 1250A (up to 2000A on request) |
| Rated short-time withstand | 20kA / 3s (25kA on request) |
| Panel types | Incomer, feeder, metering, bus-tie, transformer protection |
| Standard | IEC 62271-1, IEC 62271-200 |
It is MV metal-enclosed switchgear insulated by conditioned air, built for primary distribution — the upstream network — using vacuum circuit breakers instead of SF6.
Yes. When dimensioned and type-tested to the IEC 62271-200 withstand levels, conditioned air provides reliable insulation with sealed vacuum interruption.
Yes. No SF6 or fluorinated gas is sealed in the panels; the global warming potential is zero.
Yes. We manufacture primary air insulated switchgear under OEM/ODM with your nameplate, manuals and documentation.
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