Q1Basic Electrical Engineering

In a three-phase Delta ($\Delta$) connection, the end of one phase winding is connected to the starting end of the adjacent phase winding, forming a closed loop or mesh. Because the terminals of the line are directly connected across the phase windings, the voltage across any two lines (Line Voltage, $V_L$) is exactly equal to the voltage across the corresponding phase winding (Phase Voltage, $V_{ph}$). However, the current flowing in each line ($I_L$) is the phasor difference of the currents in the two adjacent phases, which mathematically results in the line current being $\sqrt{3}$ times the phase current ($I_{ph}$).