PM 1001608 000 06
Device handbook LINAX PQ3000-PQ5000
38/90
Incoming / outgoing / inductive / capacitive
The device provides information for all four quadrants. Quadrants
are normally identified using the roman numbers I, II, III and IV, as
shown in the adjacent graphic. Depending on whether the system
is viewed from the producer or consumer side, the interpretation
of the quadrants is changing: The energy built from the active
power in the quadrants I+IV can either been seen as delivered or
consumed active energy.
By avoiding terms like incoming / outgoing energy and inductive or
capacitive load when displaying data, an independent
interpretation of the 4-quadrant information becomes possible.
Instead the quadrant numbers I, II, III or IV, a combination of them
or an appropriate graphical representation is used. You can select
your own point of view by selecting the reference arrow system
(load or generator) in the settings of the measurement.
Used symbols
For defining a measurement uniquely, a short description (e.g. U
1N
) and a unit (e.g. V) are often not sufficient.
Some measurements need further information, which is given by one of the following symbols or a combination
of these symbols:
Mean-value
Σ
HT
Meter (high tariff)
Mean-value trend
Σ
LT
Meter (low tariff)
Bimetal function (current)
Maximum value
Energy quadrants I+IV
Minimum value
Energy quadrants II+III
TRMS
True root-mean-square value
Energy quadrants I+II
RMS
Root-mean square value (e.g.
fundamental or harmonic content only)
Energy quadrants III+IV
(H1)
Fundamental component only
I,II,III,IV
Quadrants
ø
Average (of RMS values)
Examples
PQ3000: Meters with tariff and quadrant
information
PQ5000: User mean values, last
value
PQ5000: User mean values, trend