Compare star (wye) and delta connections in three-phase systems.

In star connection, one end of each winding connects to a common neutral point; line voltage = sqrt(3) x phase voltage, while line current = phase current. In delta connection, windings form a closed loop; line voltage = phase voltage, while line current = sqrt(3) x phase current. Star provides neutral for unbalanced loads and lower insulation requirements; delta offers higher phase voltage and no neutral point.