How to use given Line-to-Line (LL) Short-Circuit (SC) information to calculate 3P SC contribution for Utility

If the 3P SC contribution from utility cannot be obtained, but the LL SC current is known, you can calculate the 3P SC contribution from the LL SC current.

Also, in PTW32, modeling a single-phase swing-bus (SB) generator is not allowed; therefore a Utility should be used. Here are the steps: