This type vacuum interrupter is the miniaturized product,it adopts Cu-Cr contact material,cup-shaped longitudinal magnetic structure,glass insulating enclosure,middle sealed shielding cylinder.It has the features of small size,large breaking capacity,high insulation level.It can be used with the corresponding indoor and outdoor vacuum circuit breaker or vacuum distribution equipments,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 1250
3 Rated frequency Hz 50
4 Short-time power frequency withstand voltage kV 42
5 Lighting impluse withstand voltage kV 75
6 Rated short-circuit breaking current kA 31.5
7 Rated withstand current(peak) kA 63
8 Rated short circuit making current kA 63
9 Rated short-time withstand current kA 31.5
10 Rated duration of short circuit S 4
11 ★Rated breaking current of single capacitor bank A 630
12 ★Rated breaking current of back-to-back capacitor bank A 400
13 Rated operating sequence O-0.3s(0.5)s-CO-180s-CO
14 Breaking operations of rated short-circuit breaking current Times 50
15 Rated mechanical endurance Times 10000
16 Closing force dut to bellow and atmosphere N 100±50
17 Force required to hold contacts open at full stroke N 200±50
18 Circuit resistance at lowest rated contact force μΩ ≤25
19 Contact limit erosion mm 3
20 Gas pressure inside vacuum interrupter Pa ≤1×10-3
21 Weight of moving parts kg 1.09
22 Weight of vacuum interrupter kg 3.55
23 Clearance between open contacts mm 11±1
24 Average opening speed m/s 1.1±0.3
25 Average closing speed m/s 0.6±0.2
26 Rated compressive force of contact N 2000±200
27 Contact bouncing duration at closing operation ms ≤2
28 Closing and opening non-simultaneity of three-phase contacts ms ≤2
29 Rebound amplitude of opening contact mm ≤2
30 Note:★Rated characteristics to be given on request

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