Impedance into a Transformer-Coupled Load
Enter the rated primary volts of the transformer and the short-circuit volts into the calculator to determine the transformer impedance percentage.
When referring to the impedance of a transformer, it is the equivalent impedance that is meant. The percentage impedance of a transformer is the volt drop on full load due to the winding resistance and leakage reactance expressed as a percentage of the rated voltage.
It is also the percentage of the normal terminal voltage required to circulate full-load current under short-circuit conditions. For this calculator, enter the rated primary volts of the transformer and the short-circuit volts to determine the transformer impedance percentage.
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