N0.

Test Item

Unit

Data

1

Rated voltage

kV

12

24

2

Rated current

A

400/630

400/630

3

Rated frequency

Hz

50/60

50/60

4

Rated short-time withstand current

kA

20

20

5

Rated short-circuit duration

s

4

4

6

Rated active load breaking current

A

400/630

400/630

7

Rated loop breaking current

A

400/630

400/630

8

Rated cable charging current

A

12

12

9

5% rated active load breaking current

A

31.5

31.5

10

Rated short-circuit making current

kA

50

50

11

Main loop resistance

μΩ

≤100

≤100

12

power frequency withstand voltage against the earth, between phases

kV rms

40

65

13

power frequency withstand voltage against the isolating distance

kV rms

48

79

14

Lightning impulse withstand voltage against the earth, between phases (peak)

kV

75

125

15

Lightning impulse withstand voltage against the air gap(peak)

kV

85

145

16

Mechanical life

Times

10000

10000

17

Three phase closing asynchronous

ms

≤5

≤5

18

Main contact blade pressure

N

520

520

19

Distance between electric parts and phase to earth

mm

≧300

≧600

20

Rated operating force

N

≤300

≤300