| Merek | ROCKWILL |
| Seri | 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.
Seri produk LW10B \ lLW36 \ LW58 dalam buku sampel adalah pemutus sirkuit SF₆ tiang porselen berdasarkan peningkatan seri ABB'LTB, dengan cakupan tegangan 72.5kV-800kV, menggunakan teknologi pemadam busur Auto Buffer ™ self powered atau teknologi pemadam busur vakum, integrasi mekanisme operasi penggerak pegas/motor, mendukung berbagai layanan kustomisasi, mencakup level tegangan lengkap 40.5-1100kV, dengan desain modular yang luar biasa dan kemampuan kustomisasi yang kuat, cocok untuk proyek yang membutuhkan adaptasi fleksibel terhadap arsitektur jaringan listrik yang berbeda. Dibuat di Cina, dengan kecepatan respons layanan global yang cepat, efisiensi logistik yang tinggi, dan keandalan tinggi dengan harga yang wajar.
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