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Definition of Commutating and Through-Fault Impedance?

Definition of Commutating and Through-Fault Impedance?

Definition of Commutating and Through-Fault Impedance?

(OP)
I'm looking at a customer spec that asks for a specific Commutating Impedance and Through-fault Impedance.  It is for a 12 pulse transformer-rectifier application.  I think commutating impedance would be the leakage inductance and copper losses in the transformer.  I would imagine through-fault impedance would be the same.  They are asking for a 6.5% commutating and 4% through-fault impedance.  I have no information about what is feeding me so I can't add any source impedance to the calculation if neccesary.

Any insight would be helpful.

Regards,
Jim

RE: Definition of Commutating and Through-Fault Impedance?

(OP)
Thank you 7anoter4.  

That link was perfect.

 

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