Physics · Transformers
The open-circuit test on a large power transformer is typically performed by applying rated voltage to the low-voltage (LV) side while keeping the high-voltage (HV) side open. The primary reason for this is to:
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1Keep the excitation current drawn from the test supply at a manageable, lower level✓
- 2Prevent the transformer from overheating during the test
- 3Easily measure the no-load losses, which only occur on the LV side
- 4Achieve a high power factor for the test measurements
Correct answer
Keep the excitation current drawn from the test supply at a manageable, lower level
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