Live tank SF6 gas circuit breaker 40.5kV to 362kV
Key attributes
| Brand | ROCKWILL |
| Series | RHB |
| Rated voltage | 40.5kV/52kV/123kV/145kV/363kV |
| Rated current | up to 4000A |
| Rated peak withstand current | up to 158kA |
| Rated frequency | 50/60Hz |
Description
The RHB type Live tank SF6 gas circuit breaker is specifically designed for outdoor high - voltage environments. Utilizing self - blast arc - extinguishing technology and taking advantage of the excellent insulating and arc - extinguishing properties of SF₆ gas。
It can quickly quench arcs, ensuring the efficient interruption of fault currents. With a compact and robust structure, it can adapt to various harsh weather conditions.
It boasts high reliability and a long service life, which can significantly reduce maintenance frequency, making it a key device for enhancing the safety and stability of power systems.
Main function introduction:
SF6 gas is used for arc extinguishing
Monitor with a pointer-type density relay
Adopt the self-blast arc extinguishing principle
Adopt pointer-type density relays for pressure and density monitoring
Technology parameters:
RHB-52
| Item | Unit | Parameter |
|---|---|---|
| Rated voltage | kV | 52 |
| Rated frequency | Hz | 50/60 |
| Rated current | A | up to 4000 |
| Rated short-time withstand current, up to 3 s | kA | up to 63 |
| Rated peak withstand current | kA | up to 158 |
| Rated short-duration power-frequency withstand voltage, 1 min | kV | 95 |
| Power-frequency withstand voltage, 1 min across open contacts | kV | 95 |
| Rated lightning impulse withstand voltage, 1.2/50 μs | kV | 200 |
| Rated lightning impulse withstand voltage, 1.2/50 μs, across open contacts | kV | 250 |
| Rated filling pressure (abs. at 20 °C) circuit-breaker/other components | MPa | 0.5 |
| Minimum functional pressure (abs. at 20 °C) circuit-breaker/other components | MPa | 0.4 |
RHB-123/145
| Item | Unit | 123kV | 145kV |
|---|---|---|---|
| Rated voltage | kV | 123 | 145 |
| Rated frequency | Hz | 50/60 | |
| Rated current | A | up to 4000 | |
| Rated short-time withstand current, up to 3 s | kA | up to 63 | |
| Rated peak withstand current | kA | up to 158 | |
| Rated short-duration power-frequency withstand voltage,1min | kV | 230 | 275 |
| Power-frequency withstand voltage,1min across open contacts | kV | 265 | 315 |
| Rated lightning impulse withstand voltage,1.2/50 μs | kV | 550 | 650 |
| Rated lightning impulse withstand voltage,1.2/50 μs,across open contacts | kV | 650 | 750 |
| Rated filling pressure (abs. at 20℃) circuit-breaker | MPa | 0.6 | |
| Minimum functional pressure (abs. at 20℃) circuit-breaker | MPa | 0.5 | |
| Temperature range (ambient) | ℃ | -30～+40 | |
| Type of installation | — | outdoor | |
| Partial discharge capacity | pC | ＜5 | |
| SF₆ leakage rate per year | — | ＜0.5% | |
| Maintenance cycle | Year | 30 | |
RHB-363
| Item | Unit | Parameter |
|---|---|---|
| Rated voltage | kV | 362 |
| Rated frequency | Hz | 50/60 |
| Rated current | A | up to 4000 |
| Rated short-time withstand current, up to 3 s | kA | up to 63 |
| Rated peak withstand current | kA | 158 |
| Rated short-duration power-frequency withstand voltage, 1 min | kV | 450 |
| Power-frequency withstand voltage, 1 min across open contacts | kV | 520 |
| Rated lightning impulse withstand voltage, 1.2/50 μs | kV | 1175 |
| Rated lightning impulse withstand voltage, 1.2/50 μs, across open contacts | kV | 1380 |
| Rated filling pressure (abs. at 20 ℃) circuit-breaker | MPa | 0.6 |
| Minimum functional pressure (abs. at 20 ℃) circuit-breaker | MPa | 0.5 |
Device structure:
RHB-40.5
RHB-72.5
RHB-123/145
RHB-170
RHB-252
RHB-362
Solutions for Live tank
-
SF6 Circuit Breaker Seal Failure Analysis and HNBR Upgrade Strategy for Venezuela 24kV NetworkCore Challenge: The 24kV outdoor SF6 circuit breakers operated by Venezuela's National Electric Corporation (CORPOELEC), under the C5-M high salt mist corrosion environment along the Lake Maracaibo coast and an annual average temperature of 32°C, experience accelerated O-ring compression set, causing the SF6 annual leakage rate to deteriorate from the design value of ≤0.1% to over 1% in actual operation, frequently triggering low-pressure lockout alarms. This is one of the key contributin
Documentation Resource Library Live tank
FAQ for Live tank
Live tank breakers are well-suited for outdoor high-voltage distribution with a dispersed layout. Dead tank breakers flexibly adapt to both indoor and outdoor applications, especially in space-constrained substations or where compact installation is required.
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.
The core difference is the arc-extinguishing medium. A VCB uses a high vacuum inside a sealed ceramic or glass envelope — the vacuum rapidly diffuses ions and metal vapor after current zero, achieving arc extinction in <10 ms. An SF₆ CB uses sulfur hexafluoride gas, which has strong electron affinity — it captures free electrons to form heavy negative ions, quickly depleting the arc channel's conductivity.
-
High Voltage Live tank SF6 Circuit Breaker 72.5kV 126kV 145kV 252kV
-
HV SF6 Dead tank Circuit Breaker supplier 420kV
-
HV Live tank SF6 gas circuit breaker 252kV 420kV 550kV
-
Outdoor Live tank SF6 gas circuit breaker 72.5kV
-
HV Live tank SF6 gas circuit breaker 52kV
-
Live tank SF6 gas circuit breaker 40.5kV to 362kV
-
Customization 123kV 145kV or Others Live tank SF6 Gas Circuit-Breaker
