| Brand | ROCKWILL |
| Series | RHD |
| Rated maximum voltage | 40.5kV/72.5kV |
| Rated maximum current | 1600-3150 A |
| Rated short-circuit breaking current | 25-50kA |
| Rated frequency | 50/60Hz |
Description
We are the pioneer in China's GIS tank circuit breaker industry and the country's first source factory specializing in this field. With decades of technical accumulation and continuous innovation, our products are reliable and our Research and Developmentis leading — many major power projects have chosen us.
40.5kV 44kV 48.3kV 52kV 60kV 66kV Dead tank SF6 circuit breaker products are a new generation of open high-voltage electrical equipment developed by Jiangsu Province such as high voltage electrical appliances Co., Ltd. with independent intellectual property rights, suitable for cold and high altitude areas, the product is composed of inlet and outlet bushings, current transformers, interrupters, frames, operating mechanisms and other components, advanced technology, quality and reliability has reached the domestic leading, international advanced level.
Main Features
Technical specifications
Among these, some SF6 tank circuit breakers cover non-standard voltage levels including 3.6kV, 4.76kV, 7.2kV, 8.25kV, 11kV, 12kV, 13.2kV, 13.8kV, 15kV, 15.5kV, 17.5kV, 22kV, 22.9kV, 24kV, 25.8kV, 27kV, 33kV, 36kV, 38kV, 40.5kV, 44kV, 60kV, 63kV, 66kV, 69kV, 88kV, 115kV, 123kV, 125kV, 126kV, 132kV, 138kV, 145kV, 150kV, 170kV, 184kV, 204kV, 220kV, 225kV, 230kV, 245kV, 275kV, 330kV, 345kV, 400kV, 765kV, 800kV with a rated short-circuit breaking current of 50kA or 63kA, and we offer customization services.
Serial number |
project |
parameters |
1 |
Rated voltage |
40.5kV 44kV 48.3kV 52kV 60kV 66kV |
2 |
Rated Current |
2500A、3150A |
3 |
Rated short-circuit current |
31.5kA |
4 |
Line charging current opening and closing test |
Level C2 |
5 |
Rated number of short circuit breaks |
More than 22 times |
6 |
Mechanical life up to: |
10000 times |
7 |
Low and high temperature tests |
-50℃ ~+55℃ |
8 |
SF6 annual air leakage rate |
Less than 0.5% |
The interrupter is typically installed inside the tank, resulting in a highly compact overall structure that enables efficient arc quenching within a limited space. Depending on the arc extinguishing principle and technical approach, the specific configuration of the interrupter may vary, but all designs include core components such as moving/stationary contacts, a nozzle, and insulating parts. During opening operation to interrupt the current, these components work together to achieve fast and reliable extinction of the arc.
The leakage rate of SF₆ gas must be controlled at an extremely low level, typically not exceeding 1% per year. SF₆ gas is a potent greenhouse gas, with a greenhouse effect 23,900 times that of carbon dioxide. If a leak occurs, it can not only cause environmental pollution but also lead to a decrease in the gas pressure within the arc quenching chamber, affecting the performance and reliability of the circuit breaker.
To monitor the leakage of SF₆ gas, gas leakage detection devices are typically installed on tank-type circuit breakers. These devices help to promptly identify any leaks so that appropriate measures can be taken to address the issue.
During the normal operation and interruption processes of a circuit breaker, SF₆ gas can decompose, producing various decomposition products such as SF₄, S₂F₂, SOF₂, HF, and SO₂. These decomposition products are often corrosive, toxic, or irritating, and therefore require monitoring.If the concentration of these decomposition products exceeds certain limits, it may indicate abnormal discharges or other faults within the arc quenching chamber. Timely maintenance and handling are necessary to prevent further damage to the equipment and to safeguard personnel health.
Login
