No.

Item

Unit

Parameter

1

Rated voltage

KV

126(252)

2

Rated power- frequency withstand voltage(1min)

To earthing

KV

230

Across the isolating distance

KV

230+73*

3

Rated lightning impulse withstand voltage

To earthing

KV

550

Across the isolating distance

KV

550+103*

4

Frequency withstand voltage at SF6 zero gauge pressure(5min)

KV

95KV

5

Rated frequency

Hz

50

6

Rated current

A

2500,3150

7

First pole-to-clear factor

1.5

8

Rated short-circuit breaking current

kA

31.5 40

9

Rated short circuit making current

kA

80 100

10

Rated short - time withstand current

kA

31.5 40

11

Rated peak withstand current

kA

31.5 40

12

Rated Short-circuit Continuing Time

S

3

13

Rated out of phase breaking current

kA

8 10

14

Short-line fault breaking current

90% 75%

15

Rated line-charging making current

A

3.5

16

Rated short-circuit breaking times

Time

20

17

Rated operating sequence

O-0.3S-CO-180-CO

18

Open time

ms

≤40

19

Making time

ms

≤120

20

Breaking time

ms

≤60

21

Close-open time

ms

≥80

22

Closing simultaneity

ms

≤3

23

Opening simultaneity

ms

≤2

24

Closing speed

m/s

3.0±0.5

25

Opening speed

m/s

5.0±0.5

26

Main loop resistance

μΩ

≤40

27

Rated SF6 pressure (22°C gage pressure)

Mpa

0.6