Dashboard › NCEES PE Power — Oct 2025 Blueprint › 4. Circuit Analysis › A. Three-phase circuits

A. Three-phase circuits

Wye/delta, line vs phase quantities, power triangle, balanced + unbalanced loads.

Lessons

Lesson 1

Three-phase circuit analysis — Y, Δ, and the power triangle

Line vs phase, Y ↔ Δ conversion, P = √3·V_LL·I_L·cos θ, complex power S = V·I*, and PF correction with capacitors.

Sophomore ~11 min