Here I described the work and use of the Fan Regulator and also analyze the behavior of Current Harmonic with the regulator value increases and decreases.

As we described in the source-load connection to measure parameters, the wire is gone through the meter and then Fan regulator connected in series to the load.

By measuring, voltage and current wattage will be calculated.

By increasing the regulator steps(increase fan speed), current harmonic decreases

This video explained it:-