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What are Power Transformer Voltage RatingsA power transformeris an electric device that is used to step up or step down the voltage level of its supply source. The stepping up or down depends upon the number of turns of primary and secondary winding- Transformers have two windings, being the primary winding and the secondary winding. The primary winding is the coil that draws power from the source. The secondary winding is the coil that delivers the energy at the transformed or changed voltage t …