24kv Rated Current 630A VMD3 vacuum Medium Voltage Circuit Breaker apply in substation

NO

Item

Unit

Technical Date

1

Rated voltage 

kV

24

2

Rated insulating level

Rated short time power 

frequency withstand voltage(1min)          

65

Rated lighting inpulse 

withstand voltage (peak value)              

125

3

Rated Frequency

Hz

50

4

Rated current 

A

630

5

Rated short circuit breaking current        

kA

20

6

Rated short time withstand current           

20

7

Rated peak withstand current  

50

8

Rated short-circuit closing current (peak value)

50

9

4S rated short-time withstand current  4s 

20

10

Rated Dynamic Current

50

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 

A

630/400                               

13

Duration of rated short-circuit current

S

4

14

Power frequency withstand voltage of secondary circuit

V

2000

15

Rated operationl voltage

Making coil

AC110/220   DC110/220

Breaking coil

AC110/220   DC110/220

Energy-storage motor 

AC110/220   DC110/220

16

Making time  (under Rated voltage)

ms

≤60

17

Breaking time(under Rated voltage)

≤45

18

Permitted abrasion thickness of moving and fixed contacts 

mm

3

19

Energy storage times 

S

≤15