Physics · Electrical Machines
Which of the following statements is NOT correct with reference to Sumpner's test on single-phase transformers?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1The primary windings are connected in parallel across the supply, while the secondary windings are connected in series in phase opposition.
- 2The primary windings are connected in parallel across the supply, while the secondary windings are connected in series in phase helping connection.✓
- 3In Sumpner's test, two identical transformers are required.
- 4This test is used to determine the temperature rise and efficiency of the transformers.
Correct answer
The primary windings are connected in parallel across the supply, while the secondary windings are connected in series in phase helping connection.
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