Main technical data

rated voltage 

12kV   

rated current 

630A

rated frequency

50Hz

rated short-time power frequency withstand voltage  

42kV

rated lightring impulse withstand voltage 

75kV

rated short-circuit breaking current   

12.5/16/20KA

rated short-circuit making current         

31.5/40/50kA

rated operations of short-circuit breaking current interruption 

30 times

rated single capacitor bank breaking current

 400A   

rated short-time withstand current 

12.5/16/20KA

rated peak withstand current 

31.5/40/50kA

rated duration of short-circuit 

4s

mechanical life 

10000times            

contact closing force due to bellows and atmosphere 

70±40N  

counterforce at rated contact stroke 

120±50N

circuit resistance at rated contact force  

≤20μΩ

shelf life        

20years

contact erosion limit                   

3mm

weight of moving parts                  

≤0.7kg

    mechanical data required for matched vacuum interrupter

rated contact stroke 

 9±1mm

average opening speed                          

1.0±0.25m/

average closing speed  

0.65±0.15m/s

added contact force  

900/1300/1600±100N

contact bouncing  duration at closing operation

≤2ms

contact bouncing bank amplitude of opening operation  

≤2mm

three-pole simultaneity  

≤1ms