Siemens SENTRON PAC4200 Manual page 25

Description
2.4 Load profile
The Q
values shown in the power tetrahedron:
Q = Displacement reactive power over fundamental U
1
Q
tot
Q cannot be displayed graphically here and can be explained as follows:
n
Q = Displacement reactive power over fundamental U
n
As the fundamental component of the voltage is usually high in practice, the following
applies: Q
Figure 2-3
Q1 should generally be used as the preferred setting, as reactive-power compensation
systems primarily refer to cos φ, which is directly related to this.
Mathematical relations
Figure 2-4
You can find more information about parameterization on the device display in the chapter
Power demand (Page 95).
Changing the configuration during operation: Changing the period length or the number of
subperiods has a direct impact on load profile recording. The device stops the current
recording and clears all data in the load profile memory. Changing the configuration has no
effect on the device counter. The device is not reset.
24
and Q options that can be set using powerconfig correspond to the reactive power
1 tot
= Total reactive power
≈ Q
n 1
Power tetrahedron
Mathematical relations
1
+ harmonic components U
1
System Manual, 05/2019, A5E02316180B-05
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PAC4200