7KM42 - Setting Reactive Power Measuring Type by powerconfig
What is the difference between Qn, Q1 und Qtot which can be set as “Reactive Power Measuring Type” in a PAC4200 by Powerconfig?
If all existing power values over the fundamental of voltage (= U1; Sinusoidal with mains frequency) are shown graphical, it results in a general tetrahedron:
See also the following FAQ:
The adjustable options on Powerconfig Q1 and Qtot meet the reactive power identifiers shown in the tetrahedron:
Q1 = Displacement reactive power over the fundamental U1
Qtot = Total reactive power
It is not possible toshow Qn in the graphic above and is explained as follows:
Qn = Shift reactive power over fundamental U1 + harmonics U. Because of, in practice, most commonly high fundamental frequency content of the voltage results: Qn ≈ Q1
Note for the devices PAC3100 and PAC3200:
Output for reactive power is always Qn.
FAQ_PAC4200_QX_EN.PDF (92 KB) ( 92 KB )
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