BF-12/630-20

This type vacuum interrupter adopts glass insulating enclosure,low chopping current, long life W-Cu contact material.It has the advantages of powerful ability of arc extinction,high reliability,long life,small size,no risk of explosion and environmentally friendly.It can be used with the corresponding vacuum load switch, which is widely used in Electric power,mechanism,chemical,metallurgy, mining and other industries.

Overall dimensions

Technical parameters

No. Item Unit Value
1 Rated voltage kV 12
2 Rated current A 630
3 Rated frequency Hz 50
4 Short-time power frequency withstand voltage kV 42
5 Lighting impluse withstand voltage kV 75
6 Rated short-time withstand voltage kA 20
7 Rated duration of short circuit S 4
8 Rated withstand current(peak) kA 50
9 Rated short circuit making current kA 50
10 Rated short-time withstand voltage kA 20
11 Rated active load breaking current A 630
12 Rated closed-loop breaking current A 630
13 Rated breaking current of cable charging A 10
14 Rated breaking current of non-load transformer A 100
15 ★ Rated breaking current of single capacitor bank A 500
16 ★ Rated breaking current of back-to-back capacitor bank A 400
17 Rated mechanical endurance Times 10000
18 Closing force due to bellow and atmosphere N 80±30
19 Force required to hold contacts open at full stroke N 150±30
20 Circuit resistance at lowest rated contact force μΩ ≤30
21 Contact limit erosion mm 3
22 Gas pressure inside vacuum interrupter Pa ≤1×10-3
23 Weight of moving parts kg 0.56
24 Weight of vacuum interrupter kg 1.64
25 Clearance between open contacts mm 10±1
26 Average opening speed m/s 1.1±0.2
27 Average closing speed m/s 0.6±0.2
28 Rated compressive force of contact N 700±50
29 Contact bouncing duration at closing operation ms ≤2
30 Closing and opening non-simultaneity of three-phase contacts ms ≤2
31 Rebound amplitude of opening contact mm ≤2
32 Note:★Rated characteristics to be given on request

Related case

20150626050702.pdf
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