Live tank SF6 gas circuit breaker 145kV-362kV
Key attributes
| Brand | ROCKWILL |
| Series | RHB |
| Rated voltage | 145 kV/252kV/362kV |
| Rated short-time withstand current | up to 63 kA |
| Rated peak withstand current | up to 158 kA |
| Rated frequency | 50/60 Hz |
Description
RHB Live Tank SF₆ Circuit Breaker uses self-blast arc extinguishing and three-phase porcelain post structure with CT spring mechanism and pointer density relay. Designed for outdoor 50Hz transmission network for load/fault current switching, available for single/three-pole switching and auto-reclosing, outstanding for low operating power and high reliability.
Core Advantages
- Self-blast arc extinction design minimizes operating power;
- Three-phase outdoor porcelain post insulation, strong environmental adaptability;
- Pointer density relay continuously monitors SF₆ status to guarantee safe operation;
- CT-type spring mechanism, stable action, low noise & easy installation.
Main technical parameters
| Item | Unit | 145kV | 252kV | 363kV |
|---|---|---|---|---|
| Rated voltage | kV | 145 | 252 | 363 |
| Rated frequency | Hz | 50/60 | ||
| Rated current | A | up to 5000 | ||
| Rated short-time withstand current, up to 3 s | kA | up to 63 | ||
| Rated peak withstand current | kA | up to 158 | ||
| 1min power-frequency withstand voltage (earth) | kV | 275 | 460 | 460 |
| 1min power-frequency withstand voltage (across open contacts) | kV | 315 | 530 | 530 |
| Rated lightning impulse withstand voltage, 1.2/50 μs (earth) | kV | 650 | 1050 | 1175 |
| Rated lightning impulse withstand voltage, 1.2/50 μs (across open contacts) | kV | 750 | 1200 | 1380 |
| Rated filling pressure (abs. at 20 ℃) circuit-breaker | MPa | 0.6 | ||
| Minimum functional pressure (abs. at 20 ℃) circuit-breaker | MPa | 0.5 | ||
| Ambient temperature range | ℃ | -30～+40 | ||
| Type of installation | — | Outdoor | ||
| Partial discharge | pC | ＜5 | ||
| Annual SF₆ leakage rate | — | ＜0.5% | ||
| Maintenance cycle | Year | 30 | ||
Working Principle
Documentation Resource Library SF6 circuit breaker
FAQ for SF6 circuit breaker
ABB’s high-voltage live-tank vacuum breakers are reliable but costly with long lead times. Hitachi Energy is mature yet lacks local high-voltage track records and smart features. Schneider Electric excels in 40.5kV distribution but is limited in voltage range and extreme performance. In contrast, Rockwill offers up to 363kV SF₆-free vacuum solutions with fast local service and spare parts delivery. Featuring robust mechanisms, full smart functions, and superior resistance to extreme cold, heavy salt fog, and short-circuit currents, our breakers ensure long maintenance-free service and lower LCC.
Q:Can Rockwill custom-engineer or modify Live tank Vacuum circuit breaker specifications to meet project-specific requirements?
A:
Rockwill provides comprehensive customized design and parameter modification for live tank vacuum circuit breakers to meet diverse project requirements. Backed by our professional R&D team, we flexibly adjust product structures, technical parameters and environmental adaptability, delivering exclusive tailored solutions in line with various on-site conditions and project standards.
In a live tank breaker, the arc chamber is mounted at the top or side of the column, exposed to ambient air. In a dead tank breaker, the arc chamber is placed inside the metal tank, fully sealed.
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