ZN28-12 Indoor AC Vacuum Circuit Breaker (VCB)

serial number

Item

Uint

Data

20KV

25KV

31.5KV

40KV

1

Rated voltage(KV)

KV

12

2

Rated current(A)

A

630,1000 1250

1250,1600

1250,16002000,2500

1600,25003150

3

Rated short-circuit break current

KV

20

25

31.5

40

4

Rated short-circuit close current(peak value)

KV

50

63

80

100

5

Rated peak value withstand current

KV

50

63

80

100

6

4SRated little withstand current

KV

20

25

31.5

40

7

Rated in sulation level

Industrial frequency withstand voltage

KV

45(fracture48)

Thunder impulse withstand voltage

75fracture84

8

Rated operation order

Off-0.3s on and off-180s-on and off

9

Mechanical life-span

times

10000

10

Rated short-circuit cruuent break and close time

times

30

20

11

Speak and move organization amount equal to the voltage of the floodgate(DC)

V

110,220

220

12

Speak and move mechanism amount shut the electric current of floodgate(DC)

A

71

128

13

Speak and move organization amount assign the voltage of the floodgate(DC)

V

110,220

14

Speak and move organization amount assign the electric current of floodgate(DC)

A

3.0,1.5

15

Switching distanc of the contact

mm

11±1

16

Ultra journey(touches the head spring and compress length)

mm

4±1

17

three-phass breaking intoshut floodgate sex of the same period

ms

≤2

18

Touch the head and shut a floodgate of time of bouncing

ms

≤2

19

Average speed of breaking brake

m/s

1.2±0.3

20

Average speed of closing brake

m/s

0.6±0.2

21

Time of breaking brake

Operate it under the voltage highest

s

≤0.06

Operate it under the voltage the mostlow

≤0.08

22

Time of closing brake

s

≤0.2

23

Each the resistance of main return circuit

μΩ

≤40

≤20

24

Allowance abrasion cumulated thickness of the moving and stationary contact

mm

3

25

Oil buffer buffers the journey

mm

10