Outstanding Features Make You Stand Out
We play extreme caution to quality and utmost attention to detail, which makes our products so perfect.
We play extreme caution to quality and utmost attention to detail, which makes our products so perfect.
The main circuit unit and running product are coherent in interchangeability.
The operating mechanism can be separated from the whole circuit breaker for convenient and easy maintenance and fix.
No need of adjustment of driving unit; long-acting lubricating, reliable corrosion resistance, and high mechanical stability make low maintenance possible.
We apply German lubricating grease boasting lower starting torsion, stronger anti-aging and oxidation resistance.
Utilizing zinc-nickel alloy plating line with a German process to make sure our corrosion resistance is 5 to 7 times stronger than ordinary zinc-plating process.
This product can easily realize diverse arrangements and combinations to meet functions like expandability and control.
VBI indoor high-voltage vacum circuit breaker is an indoor device with three-phase AC 50Hz and rated voltage of 40.5kV. It can be used for the control and protection of electrical equipment in industrial and mining enterprises, power plants and substations, especially for places with frequent operations. The installation form of the circuit breaker in the switch cabinet can be either a fixed type or a withdrawable type installed on a trolley.
VBI indoor high-voltage vacuum circuit breaker has reliable performance and is easy to install. It is the best choice for the control and protection of high-voltage transmission and distribution systems.
Applying ambient conditions
1. Ambient air temperature: -40℃~+40℃, and no more than 35°C within 24 hours
2. Relative humidity: the daily average value is not greater than 95%; the monthly average value is not greater than 90%
3. Altitude:≤1000m
| No. | Item | Unit | Data | ||
| 1 | Rated voltage | KV | 40.5 | ||
| 2 | 1min rated short-duration power frequency withstand voltage | KV | 95 | ||
| 3 | Lightning impulse withstand voltage | KV | 185 | ||
| 4 | Rated frequency | Hz | 50/60 | ||
| 5 | Rated current | A | 630/1250/1600/2000/2500 | ||
| 6 | Rated short-circuit breaking current | KA | 20 | 25 | 31.5 |
| 7 | Rated short-circuit making current (peak value) | KA | 50 | 63 | 80 |
| 8 | Rated short-time withstand current | KA | 20 | 25 | 31.5 |
| 9 | Rated peak withstand current | KA | 50 | 63 | 80 |
| 10 | Rated short-time withstand current duration | S | 4 | ||
| 11 | Rated operating sequence | 0-0.3s-CO- 180s-CO | |||
| 12 | Rated short-circuit current breaking times | Times | 30 | ||
| 13 | Mechanical Life | Times | 10000 | ||
After adjusting the circuit breaker, the mechanical characteristic parameters are shown below:
| No. | Item | Unit | Data |
| 1 | Contact opening distance | mm | 20±2 |
| 2 | Contact overtravel | mm | 6±1 |
| 3 | Average closing speed | m/s | 0.6±0.2 |
| 4 | Average breaking speed | m/s | 1.2±0.2 |
| 5 | Contact closing bounce time | ms | ≤3 |
| 6 | Contact Closing and Breaking Non-simultancous | ms | ≤2 |
| 7 | Circuit resistance per phase | μΩ | ≤80 |
| 8 | Permissible accumulated wear thickness of dynamic and static contacts | mm | 3 |
Equip your business with long-lasting switchgear components that respond to your needs and smoothen electrical operations at affordable costs.
Since 2011, Liyond has been dedicated to designing and manufacturing reliable and superior switchgear components, whilst providing impactful solution to customers all over the world.
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