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

The ZKTD vacuum switch tube adopts high alumina ceramic 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 is resistant to high voltage, has 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.
This product, equipped with a suitable operating mechanism, can be assembled into an AC circuit breaker, used as a distribution device in three-phase AC power generation and supply systems, and as a centralized control device for electric motors.

technical parameters

Rated working voltage 10KV	Rated short-time withstand time 4S
Rated working current 630A	Rated power frequency withstand voltage 42KV
Rated short-circuit breaking current 20KA	Impulse withstand voltage 75KV
Rated short-circuit breaking frequency 30 times	Contact self closing force 100 ± 10N
Rated closing current (peak) 50KA	Contact reaction force at rated opening distance of 140 ± 14N
Rated current breaking times 1000 times	Rated contact pressure and contact resistance ≤ 100 μ Ω
Mechanical lifespan of 100 million cycles	Equipped with circuit breaker ZW8-12 type
Rated short-time withstand current 20KA

External dimensions and installation dimensions