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Chapter 4—Metering Capabilities

April 2001

Power Analysis Values

 

 

Displacement Power Factor. Power factor (PF) represents the degree to which voltage and current coming into a load are out of phase. When true power factor is based on the angle between the fundamental components of current and voltage.

Harmonic Values. Harmonics can reduce the capacity of the power system. The circuit monitor determines the individual per-phase harmonic magnitudes and angles through the 63rd harmonic for all currents and voltages. The harmonic magnitudes can be formatted as either a percentage of the fundamental (default) or a percentage of the rms value. Refer to “Setting Up Individual Harmonic Calculations” on page 190 in Appendix B—Using the Command Interface for information on how to configure harmonic calculations.

Harmonic Power. Harmonic power is an indication of the non- fundamental components of current and power in the electrical circuit. The circuit monitor uses the following equation to calculate harmonic power.

Harmonic Power =

Overall Power 2

 

Fundamental Power 2

 

Distortion Power Factor. Distortion power factor is an indication of the distortion power content of non-linear loads. Linear loads do not contribute to distortion power even when harmonics are present. Distortion power factor provides a way to describe distortion in terms of its total contribution to apparent power. The circuit monitor uses the following equation to calculate the distortion power factor.

Overall Power Power Factor

Distortion Power Factor =

Fundamental Power Power Factor

© 2001 Schneider Electric All Rights Reserved

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Schneider Electric 4000 manual Harmonic Power = Overall Power, April Power Analysis Values