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Vacuum Interrupters-Circuit Breaker

Vacuum Interrupters

TD14-24 / 3150-31.5(40)VD     Vacuum Interrupters for Circuit Breaker Applications
Rated parameters of vacuum interrupter
Parameters Unit Value
Rated voltage KV 24
Rated current A 3150-2000
Rated frequency Hz 50
Rated short-time power-frequency withstanding voltage KV 60
Rated lighting impulses withstanding voltage KV 125
Rated short-circuit breaking current KA 31.5/40
Rated short-time making current KA 80/100
Rated short-time withstanding current KA 31.5/40
Rated peak withstanding current KA 80/100
Rated duration of short-circuit S 4
Breaking times of short-circuit current Times 20
Rated single capacitor bank breaking current A 630
Mechanical life Times 10000
Rated contact stroke Mm 12±1
Contact closing force due to bellows and atmosphere N 250±60
Counterforce at rated contact stroke N 340±60
Rated operation pressure of contact N 4300±300
Circuit resistance at low limit of rated contact force μΩ ≤20
Contact erosion permission length Mm ≤3
Average breaking speed m/s 1.3±0.2
Average closing speed m/s 1.6±0.2
Bounce duration of contact closing Ms ≤2
Rebound amplitude of breaking contact Mm ≤2
Three-pole simultaneity Ms ≤1
Shelf life Year 20

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