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ekstra   ara
 Post subject: 12 Pulse VFD Short-Circuit and Arc Flash Calculations
PostPosted: Thu May 12, 2022 6:22 am 

Joined: Thu Jun 09, 2016 6:17 pm
Posts: 9
Hi,

When modeling a 12-Pulse VFD that is fed from multiple transformers or a single multi-winding transformer, is it common to only utilize the fault current from one of the two transformers/windings? If the VFD input sources are within the same enclosure, should a scenario be considered where a fault could propagate from one source to the other and both sources of fault current should be considered?

Thanks for the input.


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 Post subject: Re: 12 Pulse VFD Short-Circuit and Arc Flash Calculations
PostPosted: Tue Nov 01, 2022 4:01 am 

Joined: Thu Jun 09, 2016 6:17 pm
Posts: 9
Hi,

Anyone have any input or guidance regarding this?

Thanks


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 Post subject: Re: 12 Pulse VFD Short-Circuit and Arc Flash Calculations
PostPosted: Wed Nov 02, 2022 1:37 pm 
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Joined: Tue Jan 13, 2009 5:00 pm
Posts: 596
Same enclosure and no barriers? Yes, I would consider a fault involving both sources.


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