ELECTRICAL RATINGS(3PHASE) SYMMETRICAL BASIS 

1.Rated Voltage

24KV

2.Rated Current

1250/1600A

3.Rated Frequency

50Hz 

4.Rated Short-circuit Breaking Current

25/31.5KA

5.Operations of short-circuit breaking current interruption

30´Î

6.Rated Short-circuit Making Current(Peak)

63/80KA

7.Rated Short-time Withstand current(4S)

25/31.5KA

8.Rated Single Capacitor Bank Breaking Current*

630A

9.Rated back-to-back capacitor bank breaking current*

400A

10.Short-time(1min)power-frequency withstand voltage

79KV

11.Rated lighting impulse withstand voltage(peak)

145KV

12.Circuit Resistance at Rated Contact Force

≤20μΩ

13.Mechanical Life

10,000Operations 

14.Contact Closing Force due to Bellow and Atmospheric

120±50N

15.Counterforce at rated contact force

200±50N

16.Contact Erosion Limit

3mm

17.Shelf Life

20Years

18.Part discharge

≤5pc

19.Rate operating sequence

O-0.3s-CO-180s-CO

MECHANICAL REQUIREMENTS(REF. VCB) 

1.Contact Stroke

13±1 mm 

2.Contact connection stroke

4±1 mm 

3.Average opening speed

1.3±0.2m/Sec 

4.Average closing speed

0.6±0.2m/Sec 

5.Added contact force

2500/3150±200N 

6.Bounce duration of contact closing

≤2ms

7.Out of simultaneity of contact closing and opening

≤1ms