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TD14-24/1250-31.5VG Vacuum Interrupters-Circuit Breaker

Vacuum Interrupters

TD14-24/1250-31.5VG  Vacuum Interrupters for Circuit Breaker Applications
Parameter item Unit Value
Rated voltage KV 24
Rated current A 1250-1600
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 31.5/25
Rated short-time making current KA 80/63
Rated short-time withstanding current KA 31.5/25
Rated peak withstanding current KA 80/63
Rated duration of short-circuit s 4
Breaking times of short-circuit current Time 20
Rated single capacitor bank breaking current A 630
Mechanical life Time 10000
Rated contact gap Mm 12±1
Contact closing force due to bellows and atmosphere N 120±50
Force required for specified contact gap N 250±50
Rated operation pressure of contact N 3100±200
Circuit resistance at low limit of rated contact force μΩ ≤25
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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