On the two sides of a star/delta transformer ----
- A. the voltage and current are both in phase
- B. the voltage and current both differ in phase by 30°
- C. the voltage differ in phase by 30° but currents are in phase
- D. the current differ in phase by 30° but voltages are in phase.
Answer: B. the voltage and current both differ in phase by 30°
Explanation: Star/delta introduces a 30° phase shift between both line voltages and line currents.