No

Item

Unit

Value

1

Rated voltage

kV

12

2

Rated frequency

Hz

50

3

Rated current

A

630

125

4

Rated insulation level

1min power frequency withstand voltage

kV

Arc-quenching chamber fracture 48

(effective value)

Earth , phase 42, insulating fracture 48

Lightning impulse withstand voltage (peak)

Earth , phase 75, insulating fracture 85

 5

Rated dynamic current (peak)

kA

50

6

4S thermal current

kA

20

7

Rated power load breaking current

A

630

8

Rated closed-loop breaking current

A

630

9

Rated cable charge breaking current

A

10

10

Rated breaking no-load transformer capacity

KVA

1250

11

Rated breaking AC current

A

3150

12

Rated short-circuit closed current

kA

50

13

Rated current breaking times

times

2000

14

Mechanical life

times

10000

15

Permitted wear-thickness of vacuum arc-quenching chamber contact

mm

2

16

Manual operating torque

Nm

>200