We are a factory specializing in the production of 1250A 31.5KA Vacuum interrupter for indoor circuit breaker，1250A 31.5KA Vacuum interrupter for indoor circuit breaker is characterized by compact size. Good operation guidance and modern functional industrial design.We look forward to becoming your long-term partner in China.
The 1250A 31.5KA vacuum interrupter for indoor circuit breaker has a vacuum ceramic insulated housing around two contacts (fixed contact and movable contact). The movable contact is operated from the outside through a metal bellows. Contacts are usually copper alloys developed for AC voltage applications. The end plate is made of stainless steel or copper.Ceramic shell vacuum interrupter has high heat resistance.The manufacturing process stabilizes the quality of vacuum interrupter.
|Main Technical Specification|
|3||Rated short-time（1min） power-frequency withstand voltage||kV||42/48★|
|4||Rated lightning impulse withstand voltage（Peak）||kV||75|
|6||Rated short-circuit breaking current||kA||25/31.5|
|7||Rated short-circuit making current||kA||63/80|
|8||Rated short-time withstand current||kA||25/31.5|
|9||Rated peak withstand current||kA||63/80|
|10||Breakding operations of rated short circuit breaking current||Times||30|
|11||Circuit resistance at lowest rated contact force||μΩ||≤20|
|12||Rated duration of short-circuit||s||4|
|13||Closing force due to bellow and atmosphere||N||110±40|
|14||Force required to hold contacts open at full stroke||N||150±50|
|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||2200±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 31.5KA Vacuum interrupter for indoor 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 31.5KA Vacuum interrupter for indoor 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 31.5KA Vacuum interrupter for indoor 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 31.5KA Vacuum interrupter for indoor 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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