VSD and short circuit contribution 1

[Murlinor]

Hello friends.

I have a 6.6 kV VSD connected to a 6.6/50 kV transformer. I am designing a 50 kV switchgear panel and was wondering if the VSD will contribute to the short circuit current at the 50 kV busbar?

Thanks

 

[dpc]

It depends on the drive. If it is a regenerative-type, then yes there will be some limited fault contribution. If it is non-regenerative, then no.

David Castor

http://www.cvoes.com

 

[thinker]

Generally speaking, the VSD contribution to the upstream short circuit current is limited to the VSD current overload capability.