TJ-7.2/630

This type vacuum interrupter adopts flat contact structure,glass insulation enclosure and silastic.It has the features of simple structure,reliable electrical properties,high mechanical strength,low electric wear rate.It can be used with the corresponding vacuum contactor and it is suitable in places of frequent operations.

Overall dimensions

Technical parameters

No. Item Unit Value
1 Rated voltage kV 7.2
2 Rated current A 630
3 Rated frequency Hz 50
4 Short-time power frequency withstand voltage(1min) kV 32
5 Rated breaking current kA 5.0
6 Limit breaking current kA 6.3
7 Rated making current kA 6
8 Withstand overload current kA 6
9 Electrical endurance Times 250000
10 Rated mechanical endurance Times 500000
11 Closing force due to bellow and atmosphere N 85±20
12 Force required to hold contacts open at full stroke N 200
13 Circuit resistance at lowest rated contact force μΩ ≤200
14 Gas pressure inside vacuum interrupter Pa ≤1×10-3
15 Weight of moving parts kg 0.33
16 Weight of vacuum interrupter kg 1.36
17 Clearance between open contacts mm 4±0.5
18 Average opening speed m/s 0.35±0.05
19 Average closing speed m/s 0.15±0.05
20 Contact bouncing duration at closing operation ms ≤3
21 Closing and opening non-simultaneity of three-phase contacts ms ≤1
22 Rebound amplitude of opening contact mm ≤2

Related case

20150626051058.pdf
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