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Glass Vacuum Interrupters for Indoor Circuit Breaker

Vacuum Interrupters

Glass vacuum interrupter for indoor circuit breaker application BD11-12/630-20B     BD11-12/630-25W
BD11-12/1250-20B     BD11-12/1250-25W
Parameter item Unit Value
Rated voltage KV 12
Rated current A 630/1250
Rated frequency Hz 50
Rated short-time power-frequency withstanding voltage KV 48
Rated lighting impulse withstanding voltage KV 85
Rated making current KA 20/25
Rated breaking current, max KA 50/63
Rated breaking current, min A 20/25
Rated short-time withstanding current KA 50/63
Rated duration of short-circuit S 4
Mechanical life Time 30
Electricity endurance AC-3 Time 630
Electricity endurance AC-4 Time 10000
Rated contact stroke Mm 9±1　
Contact closing force due to bellows and atmosphere N 120±50
Force required for specified contact gap N 180±50
Circuit resistance at contact force from atmosphere pressure μΩ ≤25
Contact erosion permission length Mm 3
Shelf life Year 20
Moving part weight Kg 1.05
Specifications of matched switchgear
Rated operation pressure of contact N  
Average opening speed m/s  
Average closing speed m/s  
Bounce duration of contact closing m/s  
Rebound amplitude of breaking contact mm  
Three-pole simultaneity ms  
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