Star Star Tx - Zero Seq Impedance
Star Star Tx - Zero Seq Impedance
(OP)
I was just modelling a Wye-Wye Tx on SKM PowerTools and noticed that it defaults the zero sequence impedance to be 5 times that of the positive sequence impedance for a standard core type transformer.
Is there any technical basis for this?
Also, the Tx in reality has a delta tertiary winding for auxiliary power, does that have implications on the other wye windings in terms of the zero sequence impedances?
Is there any technical basis for this?
Also, the Tx in reality has a delta tertiary winding for auxiliary power, does that have implications on the other wye windings in terms of the zero sequence impedances?






RE: Star Star Tx - Zero Seq Impedance
Regards
Marmite
RE: Star Star Tx - Zero Seq Impedance
In addition, SKM has a pretty useful FAQ named "How to fill-in the data required for 3-Winding Transformer." Give SKM tech support and call and have them e-mail it to you.