| Brand | ROCKWILL |
| Series | RHD |
| Rated maximum voltage | 40.5-170kV |
| Rated maximum current | 1600-4000A |
| 1min Power frequency withstand voltage | 95-365kV |
| Rated frequency | 50/60 |
As a professional China Factory, all breakers are fitted with all-spring operating mechanisms featuring simplified construction and superior operational reliability. We adopt the self-blast arc extinction principle that cuts down required operating energy and further improves overall equipment dependability.
All flange connections employ a dual-layer sealing layout: the outer gasket provides water tightness whereas the inner ring ensures gas tightness. This dual-seal setup drastically lowers gas leakage rate and renders the breaker well-suited for long-term outdoor service.
Self-blast arc quenching design lowers operating power and improves breaking reliability.
Single/3-phase post porcelain insulator realizes superior pollution-resistant insulation performance.
Pointer density relays continuously monitor gas pressure & density to prevent abnormal running.
Full compliance with global & domestic standards, customizable products with complete design-assembly-test integrated solutions.
| Rated maximum voltage | kV | 40.5, 72.5, 145, 170 |
| Rated maximum current | A | 1600-4000 |
| Rated frequency | Hz | 50/60 |
| 1min Power frequency withstand voltage | kV | 95-365 |
| Lightning impulse withstand voltage | kV | 185-860 |
| First open pole factor | 1.5 | |
| Rated short circuit breaking current | kA | 25-50 |
| Rated short-circuit duration | s | 4, 3 |
| Rated cable/line charging breaking current | A | 100-250 |
| Rated peak withstand current | kA | 80-125 |
| Rated making current (peak) | kA | 80-125 |
| Creepage distance | mm/kV | 25 - 31 |
| Operation sequence | O - 0.3s - CO - 180s - CO | |
| Partial Discharge | pC | ≤10 |
| Breaking time | ms | ≤60 |
| Applied standards | GB/T 1984-2024, IEC 62271-100:2021 |
Ambient temperature: -40℃ ~ +55℃
Humidity: Daily average humidity ≤95%, monthly average ≤90%
Wind pressure: less than 700 Pa
Above sea level: Maximum installation altitude: 3000m.
Earthquake intensity: not more than 9 degrees.
Air Contamination: III grade.
If it needs to be installed in plateau areas with an altitude higher than 1,000 meters, it is essential to consult with the manufacturer to take necessary measures to strengthen insulation during the ordering process.
When operating in an area with a temperature of -40℃, measures need to be taken to prevent SF₆ gas from liquefying.
These Dead Tank Vacuum Circuit Breakers utilize high-vacuum technology as both the insulating and arc-extinguishing medium. This allows for exceptionally fast arc-quenching and prevents arc re-ignition during fault current interruptions, ensuring maximum stability for high-voltage power systems.
Our Dead Tank Vacuum Circuit Breakers fully meet global and domestic standards. We support customization and supply complete design-assembly-test integrated solutions.
Pointer density relays are installed on our Dead Tank Vacuum Circuit Breakers to continuously monitor gas pressure and density and prevent abnormal operation.
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