Table 1  Circuit Breaker\'s Main Technical Data

Data

NO

Item

Unit

12kv

1

Rated voltage

kV

12

2

Rated frequency

Hz

50

3

Rated current

A

630/1250

4

Rated short circuit breaking current

kA

20/25

5

Rated peak withstand current

kA

50/63

6

Rated short time withstand current/ lasting time

kA/s

20/4 , 25/4

7

Rated short circuit closing current(peak)

kA

50/63

8

Rated operating sequence

O-0.3s-CO-180s-CO

9

Mechanical life

10000

10

Rated short circuit breaking current breaking times

50

11

1min power frequency withstand current

(wet)

kV

34/36

(dry)

kV

42/49

12

Lightning impulse withstand voltage(peak)

kV

75/85

13

Secondary circuit power frequency withstand voltage (1min)

V

2000

 Table2 Circuit Breaker\'s Main Mechanical Data

NO

Item

Unit

Data

12kv

1

Clearance between contacts

mm

9±1

2

Contact\'s overtravel

mm

2.5±0.5

3

Open speed

m/s

1.4±0.2

4

Closing speed

m/s

0.7±0.2

5

Contact closing jumping time

ms

≤2

6

Pole center distance

mm

340±1.5

7

 Three pole open/close non-simultaneity

ms

≤2

8

Each pole conducting circuit resistance

μΩ

≤70

9

Closing time

ms

25-60

10

Open time

ms

20-60

11

Motor\'s rated power

w

40