VMD1 42kv or 75Kv Indoor Vacuum Circuit Breakers Steady Current 50 63, 80, 100 kA

NO

Item

Unit

Technical Date

1

Rated voltage 

kV

12

2

Rated insulating level

Rated short time power 

frequency withstand voltage

(1min)          

42

Raed lighting inpulse 

withstand voltage 

(peak value)              

75

3

Rated Frequency

Hz

50

4

Rated current 

A

630

630

1250

1250

1250

1250

1600

1600

2000

2000

2500

2500

3150

3150

4000

4000

5

Rated short circuit breaking current        

kA

20

25

31.5

40

6

Rated short time withstand current           

20

25

31.5

40

7

Rated peak withstand current  

50

63

80

100

8

Rated short-circuit closing current (peak value)

50

63

80

100

9

4S rated short-time withstand current  4s 

20

25

31.5

40

10

Rated shock steady current 

50

63

80

100

11

Rated making surge current of capacitor bank

12.5(The frequency 

is less than 1000Hz)

12

Rated breaking current of single/

symmetrical capacitor bank