🔍 Key Concepts

• Figure A shows a three‑phase wye (star) connection with a neutral point. • In a three‑phase system, there is a specific relationship between line voltage (between lines) and phase voltage (from line to neutral) for a wye connection. • Remember that the factor √3 (about 1.73) often appears in three‑phase voltage or current relationships.

💭 Think About

• Look closely at figure A: are the phase windings connected together at a common neutral point or end‑to‑end in a loop? What type of connection does that indicate? • In that type of connection, is the line voltage measured across a single phase winding, or across two phase voltages that are 120° apart? How does vector addition of those phase voltages affect the line voltage magnitude? • Think about where the 1.73 (√3) factor goes: is it multiplying the line voltage, the phase voltage, or used to convert one into the other?

✅ Before You Answer

• Confirm from the drawing that figure A is a wye (star) connection with a neutral and not a delta connection. • Recall the standard formula for a wye connection: V_line and V_phase relationship; be sure which one is larger. • Make sure you are not mixing the current relationship for delta with the voltage relationship for wye when you choose your option.