Question

Indicate a correct choice on currents during open circuit (OC) and short circuit (SC) tests of transformer

• A. OC test at rated current & SC test at rated current
• B. OC test at rated current & SC test at no-load current
• C. OC test at no-load current & SC test at no-load current
• D. OC test at rated voltage & SC test at rated current

Hint:

OC test → rated voltage; SC test → rated current.

Answer 1

The Correct Option is D

- In the OC test, the rated voltage is applied on the LV side with the HV side open, drawing no-load current.
- In the SC test, a reduced voltage is applied to circulate rated current through the windings.