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Mean value formation
2.6.3
Measured quantities
© Landis+Gyr
U1
U2
U3
1
2
3
Figure 8. Time measurement
The phase angle between voltage and current is determined by the times
between zero passage of the phase voltage U1 and those of the phase
currents I1, I2 and I3.
For further processing of the individual signal the signal processor
generates mean values over one second, which the following
microprocessor scans at intervals of one second.
Measured quantity
Active energy in quadrant I
Active energy in quadrant II
Active energy in quadrant III
Active energy in quadrant IV
Active energy import
Active energy export
Active energy, absolute value
Active energy, absolute value
Active energy import summation
Active energy export summation
Active energy by single quantity
Reactive energy in quadrant I
Reactive energy in quadrant II
Reactive energy in quadrant III
Reactive energy in quadrant IV
Reactive energy import
Reactive energy export
Reactive energy import
Reactive energy export
Reactive energy, combined
Reactive energy, combined
Reactive energy, absolute value
Reactive energy, absolute value
Reactive energy import summation Σ +R
Reactive energy export summation Σ -R
D000062026 en a – E650 Series 4 – ZMD400AT/CT, ZFD400AT/CT – User Manual
Time measurement
for rotating field,
frequency, phase angle
1 : T
U1-U2
2 : T
U1-U3
3 : T
(fn)
U1-U1
ZMD400
A (QI)
Sum / Phases
A (QII)
Sum / Phases
A (QIII)
Sum / Phases
A (QIV)
Sum / Phases
+A (QI+QIV)
Sum / Phases
–A (QII+QIII)
Sum / Phases
+A+-A
Sum / Phases
+A--A
Sum / Phases
Σ +A
Sum
Σ -A
Sum
Σ ALx
Sum
R (QI)
Sum / Phases
R (QII)
Sum / Phases
R (QIII)
Sum / Phases
R (QIV)
Sum / Phases
+R (QI+QII)
Sum / Phases
–R (QIII+QIV) Sum / Phases
+R (QI+QIV)
Sum / Phases
–R (QII+QIII)
Sum / Phases
R (QI+QIII)
Sum / Phases
R (QII+QIV)
Sum / Phases
+R+-R
Sum / Phases
+R--R
Sum / Phases
Sum
Sum
Device description
ZFD400
Sum
Sum
Sum
Sum
Sum
Sum
Sum
Sum
Sum
Sum
Sum
Sum
Sum
Sum
Sum
Sum
Sum
Sum
Sum
Sum
Sum
Sum
Sum
Sum
Sum
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