A 400/200 volts transformer has pu impedance of 0.05. The HV side voltage required to circulate full load current during short circuit test is
- A. 20 V
- B. 40 V
- C. 10 V
- D. 5 V
Answer: A. 20 V
Explanation: Full-load impedance drop on the HV side = pu impedance × HV rated voltage = 0.05 × 400 V = 20 V.