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What is Voltage Regulation?

Voltage regulation is the difference between the transformer secondary No-Load and Full-Load voltage with respect to its Full-Load voltage.  Essentially, every transformer has a voltage drop caused by its own impedance (which is composed of its winding resistive and inductive properties).  Therefore, at different voltages and loading conditions, this internal voltage drop across the transformer windings will vary and ultimately will affect the final secondary output voltage.

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