We are a factory specializing in the production of 1250A 31.5KA Vacuum interrupter for circuit breaker,777 electrical technology co.,ltd custom Vacuum interrupter technology is used for repeated switching, motor surge current interruption, fault protection, overcurrent and short circuit protection.We look forward to becoming your long-term partner in China.
Our company has developed more than 100 kinds of 1.14kv-40.5kv vacuum interrupters (VI), which can be widely used in various indoor / outdoor VCBs, contactors and lbs. The shell of 1250A 31.5KA vacuum interrupter for circuit breaker is ceramic. The shell vacuum interrupter is mainly composed of air tight insulating shell, conductive circuit, shielding system, contact, bellows, etc.
|Main Technical Specification|
|3||Rated short-time（1min） power-frequency withstand voltage||kV||42/48★|
|4||Rated lightning impulse withstand voltage（Peak）||kV||85|
|6||Rated short-circuit breaking current||kA||31.5|
|7||Rated short-circuit making current||kA||80|
|8||Rated short-time withstand current||kA||31.5|
|9||Rated peak withstand current||kA||80|
|10||Breakding operations of rated short circuit breaking current||Times||30|
|11||Circuit resistance at lowest rated contact force||μΩ||≤15|
|12||Rated duration of short-circuit||s||4|
|13||Closing force due to bellow and atmosphere||N||90±40|
|14||Force required to hold contacts open at full stroke||N||120±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 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 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 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 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.
1. Your inquiry will be replied within 24 hours.
2. We offer you professional service in fluent English.
3. Keep the mass production as the sample in high quality
4. Freight forwarder: faster, safer, and convenient.
5. Quality: we have QC on each process,provide high quality products.
Any problem or needed please feel free let us know, we are glad to service for you
We are factory, we can provide competitive price. And all the products will be shipped after quality inspection. Usually we quote within 24 hours after we get your inquiry.
A1:We are factory with more than 10 years experience in this field.
A2: all products will be 100% inspected before shipment.
A3: Usually we will quote within 24 hours after receiving your inquiry.
A4: Credit Card, West Union, Paypal or T/T.
A5: if you can’t buy our product in your local area, we can send a sample to you. Sample will be charged by retail price, and plus all related shipping costs. Express delivery charge depends on the quantity of the samples.