We are a factory specializing in the production of 1250A 20KA Vacuum interrupter for outdoors circuit breaker,The vacuum insulating medium makes the vacuum tube have a small fracture opening distance, which can realize the miniaturization design of vacuum circuit breaker. Solid insulation improves the performance of external media.We look forward to becoming your long-term partner in China.
1250A 20KA vacuum interrupter for outdoor circuit breaker because the arc extinguishing medium and the insulating medium of the contact gap after arc extinguishing are vacuum, this kind of circuit breaker is called vacuum circuit breaker. Indoor vacuum circuit breaker has dual functions of control and protection in power system. It has the advantages of non explosion, small volume and high reliability. It is one of the equipment with the largest maintenance workload in the primary equipment of power system.
|Main Technical Specification|
|3||额Rated short-time（1min） power-frequency withstand voltage||kV||48★|
|4||Rated lightning impulse withstand voltage（Peak）||kV||85★|
|6||Rated short-circuit breaking current||kA||20|
|7||Rated short-circuit making current||kA||50|
|8||Rated short-time withstand current||kA||20|
|9||Rated peak withstand current||kA||50|
|10||Breakding operations of rated short circuit breaking current||Times||30|
|11||Circuit resistance at lowest rated contact force||μΩ||≤25|
|12||Rated duration of short-circuit||s||4|
|13||Closing force due to bellow and atmosphere||N||80±30|
|14||Force required to hold contacts open at full stroke||N||100±40|
|16||Contacts limit erosion||mm||3|
|Mechanical date of matching switchgear|
|1||Clearance between open contacts||mm||9±1|
|2||Average opening speed (0～75% contact gap)||m/s||1.1±0.2|
|3||Average closing speed(30% contact gap-contact close position)||m/s||0.7±0.2|
|4||Rated added external contact final force||N||1800±100|
|5||Contact bouncing duration at closing operation||ms||≤2|
|6||Closing and Opening non-simultaneity of three-phase contacts||ms||≤1|
|7||Maximum Rebound during opening||mm||≤2|
Meets or exceeds the electrical endurance requirements of
class E2 for autoreclosing duty per IEC 62271-100 and GB1984-2014
|Note：“★”Within transformer oil or equivalent isolation medium|
777 electrical brand vacuum interrupter adopts corrugated ceramic insulation shell and copper tungsten tungsten carbide alloy material.
The 1250A 20KA Vacuum interrupter for outdoors circuit breaker process flow makes the vacuum interrupter have the advantages of small volume, high insulation level, low closing value, long service life and convenient maintenance. The 1250A 20KA Vacuum interrupter for outdoors circuit breaker is mainly used in power transmission and distribution control system and metallurgical industry. Mining, petroleum, chemical industry, railway, broadcasting, communication, industrial high-frequency heating and other power distribution systems.
The 1250A 20KA Vacuum interrupter for outdoors circuit breaker process is the core component of the breaking part of high voltage vacuum circuit breaker.
Generally speaking, this is a satisfactory conductor power supply, and the current is interrupted immediately in case of overload and short-circuit fault to ensure insulation.
It is the most ideal arc extinguishing device.
1250A 20KA Vacuum interrupter for outdoors circuit breaker process: CE, CCC, CQC, IP68, ISO9001-2015
Realize zero defect of products and wholeheartedly provide customers with high-quality products with stable quality, reliable performance and high added value.
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