CPC G01R 31/62 (2020.01) [H01H 9/0005 (2013.01); H01H 2009/0061 (2013.01)] | 20 Claims |
1. A method for testing a transformer, the method comprising:
applying an input voltage to any two secondary taps of the transformer in order to induce an induced voltage in a primary winding of the transformer;
measuring the induced voltage in the primary winding, and measuring secondary voltages in a plurality of secondary windings of the transformer;
simultaneously measuring phase angles as a function of the secondary voltages and the induced voltage;
calculating a plurality of winding ratios based on the induced voltage measurement, the secondary voltage measurements, and the phase angle measurements; and
identifying all secondary taps based on the phase angle measurements and the plurality of winding ratios.
|