Ratio testing of transformers is a key procedure used to verify the turns ratio between the primary and secondary windings. This test ensures that the transformer is correctly transforming voltage from the primary to the secondary side as per the design specifications. During ratio testing, a known voltage is applied to the primary winding, and the voltage induced in the secondary winding is measured. The ratio of the primary to secondary voltage should match the transformer’s rated turns ratio. Any deviation could indicate issues such as winding faults or short circuits. Ratio testing is vital for confirming transformer functionality and performance during commissioning and maintenance.
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