Calculation Of Measured Quantities - Landis+Gyr ZMQ202 User Manual

2.4.2

Calculation of Measured Quantities

Active energy
Reactive energy
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Apparent energy export
Apparent energy in quadrant I
Apparent energy in quadrant II
Apparent energy in quadrant III
Apparent energy in quadrant IV
Energy flow of active energy
Energy flow of reactive energy
* Due to the different type of measurement of the Aron circuit, data for
the individual phases are not provided by the ZFQ.
By scanning the raw data of active energy A and reactive energy R every
0.2 seconds, energy components (Ws or vars) with varying energy
magnitudes are produced at fixed intervals.
The microprocessor calculates the total active energy import +A and the
total active energy export -A by summating the raw data of active energy
A1, A2 and A3.
Raw data of
active energy
A1
Σ
A2
A3
The microprocessor calculates the total reactive energy import +R and the
total reactive energy export -R by summating the raw data of reactive
energy R1, R2 and R3.
Raw data of
reactive energy
R1
Σ
R2
R3
These energy components are scaled by the microprocessor corresponding
to the meter constant (primary data) and are then available as measured
quantities. The measured quantities can be selected by parameter setting
and their measured values are fed directly to the registers to record the
energy.
-S
+Si
+Sc
–Si
–Sc
EFA
EFR
Measured quantities
+A (Import)
-A (Export)
Measured quantities
+R (Import)
-R (Export)
H 71 0200 0215 f en - ZMQ202 / ZFQ202 - User Manual
Sum / Phases Sum *
Sum / Phases Sum *
Sum / Phases Sum *
Sum / Phases Sum *
Sum / Phases Sum *
Sum Sum
Sum Sum
Description of Unit