A Wye-Delta Transformer Has a Turns Ratio of 2:1

question 15

Multiple Choice

A wye-delta transformer has a turns ratio of 2:1. It has a secondary line voltage of 480 V. The secondary is connected to a wye-connected three-phase resistive load of 50 Ω in each phase. What is the primary line current?

• A) 1.6 A
• B) 1.924 A
• C) 2.77 A
• D) 3.2 A

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