Application
The vacuum circuit breaker can be widely used in power plants, power grids, metallurgy, petrochemical, urban infrastructure construction, as well as projects such as airports, buildings, and subways. In distribution systems, it is suitable for controlling and protecting cables, overhead lines, transformers, motors, generators, and capacitor banks.
Standards
The technical parameters of the vacuum circuit breaker fully comply with GB1984, GB/T11022, and China's power industry standard DL, while also meeting the requirements of IEC62271-100, IEC56 standards, and the relevant standards of other major industrialized countries.
Features
The primary conductive circuit of the ASKV5T series assembly pole indoor high-voltage AC vacuum circuit breaker is equipped with a vacuum arc extinguishing chamber arranged inside a sealed insulating cylinder. The insulating cylinder is made of reliable epoxy resin material with excellent electromechanical properties and is formed using advanced APG technology. It serves both as a mounting support and as insulation between phases and between phases and ground.
The design of the insulating cylinder fully considers national standards and the requirements for harsh operating conditions. It not only prevents the vacuum arc extinguishing chamber from being affected by external environmental factors and protects the main circuit from dust and foreign objects, but also ensures that even in humid, hot, and severely polluted environments, the voltage effect remains in a high-resistance state.
Operating Safety
The VCB is equipped with a complete mechanical and electrical interlocking device, ensuring high operational reliability and a long service life. When paired with a compatible switchgear, it can perform safe distribution functions, ensuring the safety of both the operator and the equipment.
Testing
The vacuum circuit breaker has passed the following various tests to ensure its safe operation under normal conditions:
· Type Tests: Power frequency withstand voltage, lightning impulse withstand voltage, temperature rise, short-time and peak withstand current, short-circuit current switching capacity, and cable charging current switching test.
· Factory Tests: Mechanical characteristic tests, main circuit power frequency withstand voltage test, insulation performance test for auxiliary and control circuits, main circuit resistance test, interlocking operation test, and mechanical and electrical operation tests.
Item | Unit | Data |
Rated voltage | kV | 12 |
Rated insulation level | 1min power frequency withstand voltage | kV | 42 |
Rated lightning impulse withstand voltage | kV | 75 |
Rated frequency | Hz | 50 |
Rated current | A | 630 | 630，1250 | 1250，1600，2000， 2500，3150，4000 | 1250，1600，2000， 2500，3150，4000，5000 | 3150， 4000， 5000 |
Rated short-circuit breaking current | kA | 20 | 25 | 31.5 | 40 | 50 |
Rated short time withstand current | kA | 20 | 25 | 31.5 | 40 | 50 |
Rated peak withstand current | kA | 50 | 63 | 80 | 100 | 125 |
Rated short-circuit closing current(peak) | kA | 50 | 63 | 80 | 100 | 125 |
4 seconds thermal stabilization current | kA | 20 | 25 | 31.5 | 40 | 50 |
Rated dynamic stabilization current | kA | 50 | 63 | 80 | 100 | 125 |
Item | Unit | Data |
Rated voltage | kV | 24 |
Rated insulation level | 1min power frequency withstand voltage | kV | 65 |
Rated lightning impulse withstand voltage | kV | 125 |
Rated frequency | Hz | 50 |
Rated current | A | 630 | 630，1250 | 1250，1600，2000， 2500，3150 |
Rated short-circuit breaking current | kA | 20 | 25 | 31.5
|
Rated short time withstand current | kA | 20 | 25 | 31.5
|
Rated peak withstand current | kA | 50 | 63 | 80 |
Rated short-circuit closing current(peak) | kA | 50 | 63 | 80
|
4 seconds thermal stabilization current | kA | 20 | 25 | 31.5
|
Rated dynamic stabilization current | kA | 50 | 63 | 80
|
