Factory Price For Electrical Magnetic Overload Relay - Vacuum Interruption VI 12KV WL-39418 – Simply Buy

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 Froce 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

Main Technical Specification

Unit

Specification

Rated contact stroke

mm

9±1

Average opening speed

m/s

1.0±0.25

Average closing speed

m/s

0.65±0.15

Added contact force

N

900/1300/1600±100

Contact bouncing duration at closing operation

ms

≤2

Contact bouncing bank amplitude of opening operation

mm

≤2

Three-pole simultaneity

ms

≤1