Ratio testing of transformers is performed to verify the correct turns ratio between the primary and secondary windings, ensuring the transformer delivers the expected voltage output. This test compares the actual voltage ratio with the design specifications to detect issues such as shorted turns, incorrect winding connections, or manufacturing defects. A ratio tester or transformer turns ratio (TTR) meter applies a low voltage to one winding and measures the corresponding output on the other. Accurate ratio testing is essential during manufacturing, installation, and maintenance to confirm performance and reliability. It helps ensure safe operation and prevents faults in electrical systems.
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