Figure 1-20.Construction of a dc generator (cutaway drawing).
The regulation of a generator refers to the VOLTAGE CHANGE that takes place when the load
changes. It is usually expressed as the change in voltage from a no-load condition to a full-load condition,
and is expressed as a percentage of full-load. It is expressed in the following formula:
where EnL is the no-load terminal voltage and EfL is the full-load terminal voltage of the generator.
For example, to calculate the percent of regulation of a generator with a no-load voltage of 462 volts and
a full-load voltage of 440 volts
No-load voltage 462 V
Full-load voltage 440 V