Shanghai Kaiji specializes in manufacturing different kind of indoor high voltage vacuum circuit breakers, the main products are VKJ series with 7.2 KV - 24 KV - 35 KV and special circuit breaker lift vehicles.
Based on quality for growth, technology for development and service for market, our company always insists on such business philosophy. Shanghai Kaiji is willing to work with friends from home and abroad to develop together and win-win cooperation.




Technical data
- Main technical parameters of Model VKJvacuum breaker

Note:
- When rated short circuit breaking current ≤31.5kA, rated short circuit breaking times is 50 times.
- When rated short circuit breaking current is 50kA, rated operating sequence is: O-180s-CO.180s. CO.
- Mechanical characteristic parameters after breaker is assembled and adjusted

Note:
- What in the parentheses is for product with rated current of 2500A and above.
- Main circuit resistance of breaker is resistance between upper and lower outgoing lines.
- Main circuit resistance of breaker cart is the resistance between upper and lower moving contacts.
- See Figure 3 and Table 3 for parameters of draw-out type breaker unit with binding type primary contact:

Figure 3 Dimensions Related to Fitting of Moving and Static Contacts
- See Figure 4 for schematic diagram of secondary wiring of vacuum breaker:
Actuator of this breaker could be driven by AC or DC.
- Technical data of energy storage motor
This product adopts permanent-magnet type single direction DC motor with special speed reducer; change gear in the reducer is enclosed in a case filled with lubricating grease, output speed is 10r/min. Torque 25N.m. See the following Table 4 for technical parameters of motor.
Table 4

Note: Allow AC/DC power supply for operation
- See Figure 5 for technical data of switching on/off electromagnet






