A wye-delta transformer has a secondary phase voltage of 480 V. A delta-connected resistive load has a resistance of 12 Ω in each leg. What is the current in each load leg?
A) 30.33 A
B) 40 A
C) 53.1 A
D) 69.28 A

Question

Quizplus · Accepted Answer

In a delta connection, the line voltage is equal to the phase voltage. Therefore, the phase voltage across each resistor is 480 V. Using Ohm's Law (V = IR), the current in each leg is 480 V / 12 Ω = 40 A.

A Wye-Delta Transformer Has a Secondary Phase Voltage of 480