Q. The voltage regulation of a transformer
Solution:
- The voltage regulation of the transformer is the percentage change in the output voltage from no-load to full-load.
- Since power factor is a determining factor in the secondary voltage, power factor influences voltage regulation. This means the voltage regulation of a transformer is a dynamic, load-dependent number.
- When the load is leading, the output voltage can be greater than the no-load value. So at leading power factors the regulation may get negative as well as positive.
- But from unity power factor to lagging power factors the output voltage will be always lesser than no-load value and hence the regulation will become positive.
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