2-winding Transfromer with Buried Delta Tertiary Winding

[jliu1]

Hi;

What is the impact of 2-winding transformer Buried Delta Winding to the system response? Does it have to be modeled for Load Flow, Short Circuit or Motor Starting studies?

Thanks

 

[dpc]

For calculating line-to-ground fault currents you will certainly need to account for the delta tertiary. For Power Flow and motor starting, not as much impact.