Losses testing of a transformer involves measuring the core (iron) and copper (winding) losses to assess its efficiency and performance. Core losses, including hysteresis and eddy current losses, are determined using the open-circuit test, where the secondary winding is left open and rated voltage is applied to the primary. Copper losses, caused by the resistance of the windings, are measured using the short-circuit test, where the secondary is shorted and reduced voltage is applied to the primary. These tests help evaluate energy efficiency, detect manufacturing defects, and ensure the transformer meets operational standards before deployment.
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