ZKBF-12/630-20 type vacuum switch tubeDetailed product description：

purpose
The ZKBF type vacuum switch tube uses high alumina glass as the insulating shell and high vacuum as the medium inside the tube. Therefore, it has a small volume, high voltage resistance, strong breaking ability, long service life, and does not require maintenance of the contacts. Especially due to its advantages of not exposing the arc and being safe and reliable, it is widely used in industries such as coal, electricity, chemical, metallurgical, textile, and high-rise buildings.

This product is equipped with a suitable operating mechanism and can be assembled into an AC high-voltage vacuum load switch, serving as protection and control for electrical facilities. Used for dividing and combining load current, closed-loop current, no-load transformer, and cable charging current.
technical parameters

Rated voltage 12KV	Rated peak withstand current 50KA	Contact resistance under rated contact pressure ≤ 30 μ Ω
Rated current 630A	Rated short-time withstand time 4S	The allowable wear thickness of the contact is 3mm
Rated active load breaking current 630A	Rated short-circuit closing current 50KA	Storage period of 20 years
Rated closed-loop breaking current 630A	Rated power frequency withstand voltage 42KV	Equipped with load switch FZN21-12D/T630-20 type
Rated cable charging breaking current 10A	Contact self closing force 190 ± 20N
Rated breaking no-load transformer capacity 1250KVA	Contact reaction force at rated torque of 240 ± 24N

External dimensions and installation dimensions: