Min. Short Circuit Breaking Capacity of Vacuum Contactor
Min. Short Circuit Breaking Capacity of Vacuum Contactor
(OP)
I need your advice how to select the minimum short circuit breaking capacity of vacuum contactor (VC) for motor controller.
If SC rating of MV system (6kV) is 31.5 kA (Breaking), I think that the required SC breaking capacity of VC will be quite lower than SC rating of swithchgear due to fast acting behavior (tripping) of power fuse. But it is hard to determine the minimum short circuit breaking capacity of VC for specification preparation at the early stage of engineering.
Would you anyone else advise me how to select and determine the minimum short circuit breaking capacity of VC for 6kV motor controller?
Thanks in advance for you advice.
If SC rating of MV system (6kV) is 31.5 kA (Breaking), I think that the required SC breaking capacity of VC will be quite lower than SC rating of swithchgear due to fast acting behavior (tripping) of power fuse. But it is hard to determine the minimum short circuit breaking capacity of VC for specification preparation at the early stage of engineering.
Would you anyone else advise me how to select and determine the minimum short circuit breaking capacity of VC for 6kV motor controller?
Thanks in advance for you advice.






RE: Min. Short Circuit Breaking Capacity of Vacuum Contactor
RE: Min. Short Circuit Breaking Capacity of Vacuum Contactor
Thanks
RE: Min. Short Circuit Breaking Capacity of Vacuum Contactor
RE: Min. Short Circuit Breaking Capacity of Vacuum Contactor
Could you please elaborate the electromagnetic force awareness,does it mean that we should compare the I^2t of contactor (25^2)x0.01 s with contactor strength(4^2)x 1 s ? which from this,it is enough.
RE: Min. Short Circuit Breaking Capacity of Vacuum Contactor
RE: Min. Short Circuit Breaking Capacity of Vacuum Contactor
GH
RE: Min. Short Circuit Breaking Capacity of Vacuum Contactor