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|Rated Voltage:||12kV||Rated Frequency:||50Hz|
|Rated Current:||630A,1250A, 1600A, 2000A, 2500A, 3150A, 4000A||Type:||Indoor|
vcb circuit breaker,
3 phase circuit breaker
● Vacuum interrupter with reliable insulating and excellent arc extinguishing performance
The vacuum interrupter is installed in the insulating cylinder, the insulating cylinder is made of epoxy resin which use APG technique. This structure can effectively prevent the vacuum interrupter affects by external factors including external shock and pollution environment.
● Spring-charging operating mechanism with gear driving
CKVB-12/T use spring-charging operating mechanism, which including five units as below:
---- Closing stored-energy unit: is driven by gear and stores energy by spring mechanism; it uses cam’s curvilinear motion to drive the insulated lever for closing.
---- Spring unit: is a spring sets including a left-handed spring and a right-handed spring.
---- Opening unit: latch fastens half shaft and keeps the switch in closing status; iron core of the coils drives the half shaft to turn for opening; it also use the oil buffer to eliminate the opening bounce.
---- Circuit unit: includes anti-trip relay, bridge rectifier, etc.
---- Auxiliary switch unit: is equipped with rotary switch which with excellent performance, such as reliable contact, clear signal and convenient connection.
It can store energy by manual or motor, what is more, as the stored-energy time for motor is very short, so it can operate by multiple reclosing. Meanwhile, it can also operate by automatic reclosing.
● With perfect anti-maloperation function
---- After closing operation, closing curved plate is locked by closing interlocking curved plate, it can’t close again until the circuit-breaker opening.
---- In the case of the circuit-breaker opening by some reason after closing, if the closing order is still holding on, the anti-trip control circuit which insides circuit-breaker will cut off the closing circuit to avoid multiple reclosing.
---- If the withdrawable circuit-breaker doesn’t in the right position of testing or working, closing curved plate will be locked by interlocking curved plate, at the same time the closing circuit will be cut off, which avoids the circuit-breaker to get into load area under closing status.
---- After closing at the position of working or testing, the roller will lock the locking plate of pushing mechanism, and then withdrawable circuit-breaker can’t move. This can prevent the circuit-breaker to be pushed into or pull out of the load area while in the condition of closing.
---- In the case of using electric interlocking for closing, it can prevent closing operation in the condition of without using locking device to unlock.
● With long life-span
CKVB-12/T can operate frequently or break short circuit current repeatedly, its mechanical life can up to 20,000 times, the breaking times of full capacity short circuit current can most up to 50 times. It can use for reclosing operation, also with reliable operation and long life-span.
● With easy maintenance
In the daily maintenance, CKVB-12/T just need to do the basic cleaning or lubricating maintenance. Each current rating is equipped with dust-proof insulating cylinder cover, in practice, it is no need to remove the cover if the rated current is under 1250A, but it need to remove it if the rated current is more than 1600A.
● Convenient installation
The mounting type of CKVB-12/T can be fixed or withdrawable, it can also be installed on the frame.
Contact Person: Sabrina Yang
Tel: 86 756 8992445