| Marca | ROCKWILL |
| Série | RHB |
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.
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.
| 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 |
Upon trip signal, trip spring drives the integrated moving assembly (cylinder, moving arc contact & connecting rod) downward. Main contacts separate first, shifting circuit current onto closed arc contacts; arc generates once arc contacts part.
For short-circuit breaking, massive arc energy heats surrounding SF₆ gas and feeds high-temperature airflow into thermal expansion chamber to build high-pressure cold gas, closing the check valve. At current zero-crossing, high-pressure gas blasts across contact gap to quench arc efficiently. Meanwhile, compression chamber’s excess pressure opens bottom elastic pressure relief valve to release redundant gas pressure, drastically cutting required operating work of the spring mechanism and optimizing breaking performance.
A série de produtos LW10B \ lLW36 \ LW58 no catálogo de amostras são disjuntores de SF₆ com coluna de porcelana baseados na melhoria da série LTB da ABB, com cobertura de tensão de 72.5kV-800kV, utilizando tecnologia de extinção de arco Auto Buffer ™ autoalimentada ou tecnologia de extinção de arco a vácuo, mecanismo de operação integrado com mola/motor, suporta diversos serviços personalizados, abrangendo níveis de tensão completos de 40.5-1100kV, com design modular destacável e forte capacidade de personalização, adequado para projetos que requerem adaptação flexível a diferentes arquiteturas de rede. Fabricado na China, com resposta rápida ao serviço global, alta eficiência logística e alta confiabilidade a um preço razoável.
Login
