Dead Tank SF6 circuit breaker supplier-363kV
Key attributes
| Brand | ROCKWILL |
| Model NO. | Dead Tank SF6 circuit breaker supplier-363kV |
| Rated voltage | 363kV |
| Rated normal current | 5000A |
| Rated frequency | 50/60Hz |
| Series | RHD |
Description
Description
Pioneers in China's Dead Tank SF6 Circuit Breaker industry. As the country's first source factory specializing in this field, we boast decades of technical accumulation and continuous innovation — ensuring reliable products while leading the way in R&D. Thanks to our outstanding reliability, we've been chosen for numerous major power projects.
Main Features
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High Voltage Rating Adaptability: Specifically designed for 363 kV extra-high voltage systems, it stably handles high voltages and large currents, ensuring reliable operation of EHV transmission lines.
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Efficient Arc Extinguishing Performance: Using SF6 gas as the arc-extinguishing medium, it features fast arc extinction and high insulation strength, quickly cutting off fault currents and minimizing system impacts.
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Dead Tank Sealed Structure: The dead tank design encloses live parts in a metal tank filled with SF6 gas, effectively isolating them from the external environment. It offers strong seismic resistance and adapts to harsh climates and complex geographical conditions.
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Long Lifespan & Low Maintenance: With long mechanical and electrical lifespans, the sealed structure reduces component aging and external erosion risks, minimizing maintenance frequency and operational costs.
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Multifunctional Integrated Design: Integrates components like inlet/outlet bushings and current transformers, enabling multiple functions such as current measurement, protection, and circuit switching to meet complex control needs of power systems.
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High Safety Assurance: Equipped with comprehensive anti-misoperation interlocking devices and multiple insulation protections, it effectively prevents operator errors and ensures the safety of personnel and equipment.
Technical specifications
|
Serial number |
Project |
Parameters |
|
|
1 |
Rated voltage |
363kV |
|
|
2 |
Rated Current |
5000A |
|
|
3 |
Rated frequency |
50/60Hz |
|
|
4 |
Rated short-circuit breaking current |
50kA |
|
| 5 | Power frequency withstand voltage |
Rated withstand voltage (phase-to-earth / phase-to-phase) |
510 kV |
|
Rated withstand voltage (isolating break / across open contacts) |
720 kV |
||
|
6 |
Rated short-circuit closing current |
130kA |
|
|
7 |
Rated short-time withstand current and duration |
50kA/3s |
|
| 8 | Lightning impulse withstand voltage (peak) |
Rated withstand voltage (phase-to-earth / phase-to-phase) |
1175 kV |
|
Rated withstand voltage (isolating break / across open contacts) |
1470 kV |
||
|
9 |
Rated peak withstand current |
130kA |
|
|
10 |
Mechanical life |
M2 |
|
Documentation Resource Library Dead tank SF6 circuit breaker
FAQ for Dead tank SF6 circuit breaker
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.
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.
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.
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