Mechanical Characteristics Of Vacuum Circuit Breakers

1. Contact opening distance mm 11 ± 1.0 10 ± 1.0 11 ± 1.0
2 Contact stroke mm 4 ± 1.0 3 ± 0.5
Contact pressure of 3 contacts N 1500 ± 200 3000 ± 200 5000 ± 300
4. Average closing speed m/s 0.6 ± 0.2
5. Average opening speed m/s 1.1 ± 0.2 1.1 ± 0.3 1.1 ± 0.3
6 closing bounce time ms<2
7 points, combined with different synchronous ms<3
8 closing time ms<100
9 opening time ms<60
10 main circuit DC resistance: μΩ≤ 60 ≤ 60 ≤ 20
11. Cumulative allowable wear thickness of dynamic and static contacts mm 3.0