Question
Download Solution PDFDuring the no-load test of a transformer, the secondary winding is:
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFConcept:
The no-load test (or open-circuit test) of a transformer is performed to determine the core (iron) losses and no-load current. In this test, the secondary winding is kept open while the rated voltage is applied to the primary winding.
Calculation
During this test, the secondary winding is left open-circuited, meaning no current flows through it. This ensures that all the power supplied to the primary winding is used only to overcome core losses (hysteresis and eddy current losses) and a small amount of copper loss due to no-load current.
Connecting the secondary to a load or short-circuiting it would not meet the objective of this test.
Last updated on Jun 7, 2025
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