ZKTD-400(630)/6KV type ceramic vacuum switch tubeDetailed product description：

purpose

The ZKTD ceramic vacuum switch tube adopts high alumina ceramic as the insulation 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 industrial sectors such as coal, power, chemical, metallurgy, and petroleum.

This product is equipped with a suitable operating mechanism and can be assembled into an AC circuit breaker for use in power distribution control devices, for remote connection and disconnection of motors, transformers, capacitor banks, etc. It is particularly suitable for forming explosion-proof magnetic starters.

technical parameters

Rated working voltage 6KV
Rated working current 400, 630A
Rated short-circuit breaking current 12.5KA
Rated short-circuit breaking frequency 16 times
Rated current breaking frequency 3000 times
Mechanical lifespan of 15000 cycles
Rated short-time withstand current 12.5KA
Rated short-time withstand time 4S
Rated power frequency withstand voltage 32KV
Rated opening torque 4 ± 0.4mm, contact self closing force 115 ± 11N
Contact reaction force at rated opening moment 140 ± 14N
Contact resistance under rated contact pressure ≤ 100 μ Ω

External dimensions and installation dimensions