In a 3-phase star-connected balance system, the line voltage V_L is related to phase voltage V_ph by:
AV_L = 3 * V_ph
BV_L = V_ph
CV_L = V_ph / sqrt(3)
DV_L = sqrt(3) * V_ph
Explanation
In star connection, Line Voltage is sqrt(3) times the Phase Voltage (V_L = sqrt(3) * V_ph), while Line Current equals Phase Current.

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