Main Technical Data

1

Rated Voltage

12 kV

2

Rated Current

630 A

3

Rated Frequency

50 Hz

4

Rated Short-circuit Breaking Current

25 kA

5

Operations of Short-circuit Breaking

30 times

6

Rated Short-circuit Making Current

63 kA

7

Rated Peak Withstand Current

63 kA

8

Rated Short-time Withstand Current (4s)

25 kA

9

Rated Breaking Current for Single Capacitor Bank

630 A

10

Rated Breaking Current for Back-to-back Capacitor Bank

400 A

11

Short-time (1min) Power Frequency Withstand Voltage

42 kV

12

Lightning Impulse Withstand Voltage (Peak)

75 kV

13

Circuit Resistance at Rated Contact Pressure

≤40 µΩ

14

Mechanical Lifespan

30,000 times

15

Self-closing Force of Contacts

120±50 N

16

Counterforce at Rated Contact Clearance

180±50 N

17

Allowed Contact Erosion

3 mm

18

Storage Period

20 years

19

Partial Discharge

≤1 PC

20

Rated Operating Sequence

O-0.3s-CO-180s-CO

Mechanical Data of Equipped Vacuum Switch

1

Rated Contact Clearance

9±1 mm

2

Contact Connection Stroke

4±1 mm

3

Average Opening Speed

1.1±0.2 m/s

4

Average Closing Speed

0.6±0.2 m/s

5

Rated Pressure between Contacts

2000±200 N

6

Bounce Duration of Closing Contacts

≤2 ms

7

Asynchronism of 3-phase Opening & Closing Operation

≤1 ms

8

Maximum Overstroke

≤2 mm