We have several two-phase transformers in our plant and I need to model them for our arc flash study. I found some old drawings that provide the following data:

2-167KVA TRANSFORMERS SCOTT CONNECTED
13.2 KV 3PHASE TO 240/480V 2PHASE

I am using ESA Easypower but any general guidence would be very helpful.

Thank you!

Available arc flash models generally consider 3 phase only. Considering that the fault energy is identical for single or two phase cases with L-L faults, the 3 phase model results are still valid.

My initial thougth was "open Delta". However, admittedly I've never heard the term, "Scott Connected". Since I'm always eager to learn, I can't wait to fine out what that refers to! Thanks.

A Scott Connection involves the use of two transformers connected in a Tee arrangement which acts as if it was a delta-wye. The Scott connection was designed for going between 3-phase and 2-phase systems, although it has become synonymous with any "T" connection.

The T arrangement is very popular in small kVA ratings (i.e. <30kVA).
A 208Y120 output effectively requires one 240V winding tapped at 50% and 86.7% and the other tapped at 86.7% and 25%.