ELECTRICAL RATINGS(3PHASE) SYMMETRICAL BASIS 

1.Rated Voltage

12KV

2.Rated Current

   630/1250A

3.Rated Frequency

50Hz 

4.Rated Short-time Power Frequency Withstand Voltage(1min)

42KV

5.Rated lightring Impulse Withstand Voltage

75KV

6. Rated short-circuit  breaking current

25KA

7. Rated short-circuit making current(peak)

63KA

8.Rated operations of short-circuit breaking current interruption

30times

9.Rated single capacitor bank breaking current interruption

630A

10.Rated Short-time Withstand current

25KA

11.Rated peak withstand  current

63KA

12. Rated Duration of Short-circuit

4s 

13. Mechanical Life

20000times 

14.Contact closing force due to bellows and atmosphere

120+50N

15.Counterforce at rated contact stroke

190+60N

16. Circuit Resistance at Rated Contact Force Atmosphere Force

20Micro ohms

17. Shelf Life

20Years

18. Contact Erosion Limit

3mm 

19.Weight of moving parts

1.5kg

MECHANICAL REQUIREMENTS(REF. VCB) 

1. Rated Contact  Stroke

10+1mm

2.Opening Speed(average)

1.0+0.25m/Sec 

3.Closing Speed(average)

0.65+0.15m/Sec 

4.Added  contact  force

2000+100N

5. Maximum Contact Bounse Duration at closing operation

2ms

6. Contact Bouncing Bank Amplitude of Opeing Operation

2mm 

7.Three-pole simultaneity

1ms