24kv Rated Voltage 50Hz Medium Voltage Circuit Breaker For Power System 12kv Substation

Table 1  Circuit Breaker\'s Main Technical Data

Data

NO

Item

Unit

24kv

1

Rated voltage

kV

24

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

time

10000

10

Rated short circuit breaking current breaking times

20

11

1min power frequency withstand current

(wet)

kV

50/64

(dry)

kV

65/79

12

Lightning impulse withstand voltage(peak)

kV

125/145

13

Secondary circuit power frequency withstand voltage (1min)

V

2000

 Table2 Circuit Breaker\'s Main Mechanical Data

NO

Item

Unit

Data

24kv

1

Clearance between contacts

mm

12±1

2

Contact\'s overtravel

mm

3.5±1

3

Open speed

m/s

1.4±0.2

4

Closing speed

m/s

0.7±0.2

5