Ratio testing of a transformer is a crucial diagnostic procedure used to verify the correct turns ratio between the primary and secondary windings. This test ensures the transformer delivers the expected voltage output based on its design specifications. A transformer turns ratio (TTR) tester applies a known voltage to one winding and measures the resulting voltage on the other. The measured ratio is then compared with the rated ratio. Any deviation beyond acceptable limits may indicate problems like shorted turns, incorrect connections, or winding damage. Regular ratio testing helps maintain transformer performance, ensures accuracy, and prevents faults during operation.
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