Main technical data

rated voltage 

7.2kV   

rated current 

250/400/630A

rated frequency

50Hz

rated short-time power frequency withstand voltage  

42kV

rated lightring impulse withstand voltage 

75kV

rated making  current     

2.5/4.0/6.3KA

rated breaking current ,max             

2.0/3.2/5.0kA

rated breaking current ,min 

50/80/125 kA

rated making current ,limit   

2.5/4.0/6.3 kA

rated short-time withstand current  

2.5/4.0/6.3 kA

rated duration of short-circuit 

4s

mechanical life 

30×10000times

Electricity life AC-3  

25×10000 times

Electricity life AC-4  

10×10000 times

Rated contact stroke  

6±1mm

Contact closing force due to bellows and atmosphere

70±30N

counterforce at rated contact stroke  

110±40N

circuit resistance at rated contact atmosphere force                   

≤150μΩ

shelf life                      

20years

contact erosion limit                                   

3mm

weight of moving parts

≤0.6kg

mechanical data required for matched vacuum interrupter

added contact stroke  

 110±10N

average opening speed                          

0.6±0.2m/s

average closing speed  

0.3±0.1m/s

contact bouncing  duration at closing operation

≤2ms

contact bouncing bank amplitude of opening operation  

≤2mm

three-pole simultaneity  

≤1ms