VSM series of indoor high voltage vacuum circuit breaker is adopted front and rare construction for their permanent magnetic and vacuum interrupters. The main conducting circuit is with floor-standing type, the upper and lower outlet terminal and vacuum interrupters are installed in one insulation house. The insulation house is casted with epoxy resin material by APG technology, which can protect the surface of the vacuum interrupters against dust accumulation and impact. It also has good insulation property under humid, hot and pollution ambient condition.
The vacuum circuit breaker with permanent mechanism is air-insulated, used for indoor installation for different kind of power load, it is suitable for electrical net construction and reconstruction project in municipal net, rural net, mineral and railway net system, especially used in that fields which require frequently switching and have some requirement for short circuit operation cycles. This product was introduced by some international advance technique and processing technology with characteristics of intelligence, high reliability, long endurance and free maintenance etc.
For more information, please kindly visit our website at http://www.longxiangelectric.com.
If you have some requirements in these fields, pls feel free to contact us as per following information:
Email: market@longxiangdianqi.com
phone:+86 917 3323286
Fax: +86 917 3318358
Thank you very much for your kindly attention!
With best regards,

Ms. Guo Ran
Export manager of Marketing department
shaanxi Shaankai-Longxiang Electrical Ltd.
Add: No.3, Huoju Road, High New Tech Zone, Baoji, Shaanxi, China
Postcode: 721006
Tel: +86 917 3323286
Fax:+86 917 3318358

Main Technical Specification S.N
Rated voltage 12kV
Rated current A 630 1000 1250 1600 2000 2500 3150
Rated short circuit breaking current kA 20 25 31.5 40
Rated peak withstand current kA 50 63 80 100
Rated short time withstand current kA 20 25 31.5 40
Rated short circuit making current kA 25 63 80 100
Switching operations of short circuit current Cycle 50 30
Rated operating sequence 0-0.3s-CO-180s-CO,0-180s-CO-180s-CO(40kA)
Mechanical endurance Cycle 20000
Rated breaking operations of the rated urrent
Cycle 20000
Rated lightning impulse withstand voltage kV 75
Rated power frequency withstand voltage kV/min 42
Contact stroke mm 111
Overtravel of contacts mm 40.5
Closing speed m/s 0.60.2
Opening speed m/s 1.00.2
Contact bouncing duration at closing peration ms 2
Simultaneity of three phase closing peration ms 2
Closing time ms 75
Opening time ms 65
Driven Power voltage of Permanent agnetic mechanism V DC220
Storage life S