Rockwell Automation 1404-M4_M5_M6_M8 Powermonitor 3000 User Manual, Firmware rev. 3.0 or LATER - Manual (Page 33)

Publication 1404-UM001F-EN-P - November 2009 33
Powermonitor 3000 Unit Operations Chapter 3
Power Factor Results
The power monitor calculates true, displacement and distortion power
factor, each on a per-phase and total three-phase basis. True power
factor is the ratio between the total true power and total apparent
power (in percent), and takes into account the effect of phase shift
between the voltage and current as well as any harmonics present.
Displacement power factor is the cosine of the difference between the
phase angle of the fundamental voltage and current (in percent), and
reflects the value a typical analog power factor meter would measure.
The true power factor and displacement power factor are equal only if
there are no harmonics present in either the voltage or current. These
values are signed to show lead (+) or lag (-). Distortion power factor
is the ratio between the magnitude of the fundamental and the sum of
the magnitudes for all of the current harmonics (in percent).
The power quantities (kW, kWh, kVAR, kVARh, and power factor) are
four-quadrant measurements. The power monitor measures and
expresses these measurements in a way that allows you to determine
the magnitude and direction of both the real power flow and the
reactive power flow.
Explanation of Power Factor Values on page 34 indicates the
relationship between these quantities and the numeric signs used by
the power monitor to convey the information.
Power and Power Factor Results
Parameter Description Range Units
Phase 1 Power Power of individual phase or sum of phases;
signed to show direction.
0…999.9x10
22 Watts
Phase 2 Power
Phase 3 Power
3-Phase Total Power
Phase 1 Reactive Power Reactive power of individual phase or sum of all
phases; signed to show direction.
0…999.9x10
22 VARs
(volt-amperes
reactive)
Phase 2 Reactive Power
Phase 3 Reactive Power
3-Phase Total Reactive Power
Phase 1 Apparent Power Apparent power of individual phase or sum of all
phases.
0…999.9x10
22 VA
(volt-amperes)
Phase 2 Apparent Power
Phase 3 Apparent Power
3-Phase Total Apparent Power