| Brand | ROCKWILL |
| Series | RVD |
| Rated voltage | 72.5kV |
| Rated frequency | 60 Hz |
| At lightning impulse | 350kV |
| Rated normal current | 1200/2000/3000 A |
| Rated short-circuit making current | 100 kA |
Based on this expertise, we have developed an SF₆-free dead tank circuit breaker (DTCB) that is very similar to its SF₆ predecessor. Using our g³ insulating and switching SF₆-free technology, the new RVD-72.5 remains compact with the same footprint. Performance and life cycle costs remain similar while offering a significant decrease in the carbon footprint.
The SF₆-free gas mixture used in the new RVD-72.5 works on the same well-known principle for insulation and breaking purposes as that of SF₆ gas. The g³ gas is a mixture of carbon dioxide (CO₂) with oxygen (O₂) and a small percentage of an additive (C4F7N), whose physical properties are essential to g³. Its contribution to global warming is significantly lower than that of SF₆ gas – reduced by 99%.
| IEC | VALUE | UNITS |
|---|---|---|
| Rated voltage | 72.5 | kV |
| Rated frequency | 60 | Hz |
|
Rated insulation level
|
160 | kV |
| 140 | kV | |
| At lightning impulse | 350 | kV |
| Rated normal current | 1200/2000/3000 | A |
| Rated short-circuit breaking current | 40 | kA |
| Rated short-circuit making current | 100 | kA |
| Rated break time | 50 | ms |
| Rated operating sequence | O-CO-15s-CO O-0.3s-CO-180s-CO |
|
| Ambient air temperature upper limit | +40 °C |
| Ambient air temperature 24-hour average | +35 °C |
| Ambient air temperature lower limit | –30 °C |
| Altitude above sea level | ≤ 1000 m |
| Relative humidity (24-hour average) | ≤ 95% |
| Relative humidity (monthly average) | ≤ 90% |
| Water vapor pressure (24-hour average) | ≤ 2.2 kPa |
| Water vapor pressure (monthly average) | ≤ 1.8 kPa |
| Solar radiation | ≤ 1000 W/m² |
| Pollution level | Level III |
| Seismic capability | High seismic per IEEE 693 |
It uses g³ gas — a mixture of CO₂, O₂ and a small percentage of C4F7N additive. It contains no SF₆ and reduces global warming potential by 99% versus SF₆.
Yes. The RVD-72.5 shares the same dead-tank footprint and many components with the RHD-72.5 SF₆ breaker, with identical operational and maintenance procedures, enabling direct retrofit.
Similar to SF₆ breakers — sealed-for-life gas system, factory-assembled and tested before shipment, low maintenance frequency.
Login
