Vacuum Circuit Breaker

ZW6-12/630-16(20) Outdoor Vacuum circuit breaker

ZW6-21/630-1620type outdoor vacuum circuit breaker accounts for three-phase electrical system with 12 KV and 50Hz, mainly used in network for breaking or closing load current, overload current and short-circuit current, or used as breaking switch in ciry 12kV degree network.

Table 1 for installing parameter

Number Item Unit Prameter 1 Contact distance mm 9±1 2 Contact travel 3±1 3 Average switch-on speed m/s 0.6±0.2 4 Average switch-off speed 1.0±0.2 5 Contact switch-on bounce time ms ≤2 6 Three-phase switch-off conespnding time ms ≤2 7 Switch-on time s ≤0.1 8 Switch-off time Max.Operating voltage D ≤0.06 Min.Operating voltage ≤0.1 9 Each phase loop DC resistance μΩ ≤200 10 Distance between phases (arc room) mm 193

Table2 for rated technique parameter

Number Item Unit Prameter 1 Rated voltage KV 12 2 Rated insulating level 1min power Dry KV 42 Wet(to ground) 34 Lighting impulse voltage withstand (peak) 75 3 Rated current A 630 4 Rated frequency Hz 50 5 Rated short circuit breaking current KA 12.5,16,20 6 Rated short circuit closing curent (peak) 31.5,40,50 7 Rated short circuit closing current 31.5,40,50 8 Rated short-times of rated short-circuit 4S 12.5,16,20 9 Operating order   off-0.3S-on-off-180S-on-off 10 Breaking times of rated short-circuit   30 11 Mechanical life 10000 12 Rated operating voltage with CT spring operating dvice V DC24,48V AC DC110V,220V 13 Permitted grinding thickness of contact mm 3 14 Rated current of over-current trip A 5 15 Weight kg 130(standard)

2013-01-05

Vacuum Circuit Breaker