Transmission 40.5kV Manual Vacuum Circuit Breaker Draw Out Type

"Vacuum circuit breaker" is named after its arc extinguishing medium and the
insulating medium of the contact gap after arc extinguishing are both high
vacuum; it has the advantages of small size, light weight, suitable for
frequent operation, and no need for maintenance of arc extinguishing. The
application in the network is more popular. Vacuum circuit breaker is an indoor
power distribution device in a 3~10kV, 50Hz three-phase AC system,


2. Parameter of air circuit breaker draw out type

NO Item Units Technical parameters
1 Rated voltage kV 40.5
2 Thunder impulse withstand voltage(peak value) kV 185
3 lmin industrial frequency withstand voltage kV 95
4 Rated frequency Hz 50
5 Rated current A 1250,1600,2000
6 Rated short-circuit break current kA 25 31.5
7 Rated peak value withstand current kA 25 31.5
8 Rated peak value withstand current KA 63 80
9 Rated short-circuit duration time s 4
10 Rated short circuit breaking time ms
11 Rated short circuit closing current kA 80
12 Rated operation order 0-0.3s-C0-180s-C0
13 Time of closing brake ms 50~85
14 Time of breaking brake ms 40~85
15 Rated short-circuit current break and close times Times 20
16 Mechanical life-span Times 10000
17 Rated dropout current of condenser bank A 630
18 Rated power of energy-storage electric machine W 275
19 Rated volt of energy-storage motor V 25 ± 2
20 Storage time S ≤15
21 Closing and opening solenoid rated voltage V ≈220,110
22 Loss of pressure tripping device rated voltage V ≈220,110
23 Over current tripping device rated current A 5
24 Auxiliary switch rated voltage current A DC10

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