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

purpose
The ZKTD vacuum switch tube adopts high alumina glass as the insulation shell, and is covered with high-strength corrugated insulation material on the outside. The tube uses high vacuum as the medium, so 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, metallurgy, textile, and high-rise buildings.

The ZKBDW-630/12-20 vacuum switch tube, equipped with a suitable operating mechanism, can be assembled into an AC high-voltage circuit breaker and used as a distribution and motor centralized control device in three-phase AC power generation and supply systems.

Technical parameters of ZKBDW-630/12-20 vacuum switch tube

Rated voltage 10KV	Rated short-time withstand current 20KA
Rated working current 630A	Rated short-time withstand time 4S
Rated short-circuit breaking current 20KA	Contact self closing force 190 ± 40N
Rated current breaking times 30 times	Contact reaction force at rated torque of 240 ± 40N
Rated impulse withstand voltage 75KV	Contact resistance under rated contact pressure ≤ 30 μ Ω
Rated short-circuit closing current 50KA (peak)	The allowable wear thickness of the contact is 3mm
Rated peak withstand current 50KA	Storage period of 20 years
Rated power frequency withstand voltage 42KV	Equipped with circuit breaker ZW8-12 type

ZKBDW-630/12-20 vacuum switch tube external dimensions and installation dimensions