Formation Of Measured Quantities - Landis+Gyr E650 Series 4 User Manual

Device description
2.6.4

Formation of measured quantities

Active energy
D000062026 en a – E650 Series 4 – ZMD400AT/CT, ZFD400AT/CT – User Manual
Measured quantity
Apparent energy import
Apparent energy export
Phase voltages (RMS)
Phase currents (RMS)
Neutral current
Network frequency
Active power
Reactive power
Phase angle between voltages
Phase angle between voltage and
current
Power factor
Direction of rotating field
TTHD of active power
TTHD of phase voltage
TTHD of phase current
TTHD of voltage
TTHD of current
Line (copper) losses of active
energy
Transformer (iron) losses of active
energy
Signed line (copper) losses of
active energy **
Signed transformer (iron) losses of
active energy **
Voltage square hours
Ampere square hours
* Only if U1 is present.
** OLA/NLA not accessible, if ±OLA/±NLA selected.
By scanning the mean values of active power P, and in combimeters also
reactive power Q every second, energy components are produced (Ws or
vars) at fixed intervals (every second) and with varying energy magnitudes
or demand. These energy components are scaled by the microprocessor
corresponding to the meter constant and are then available as measured
quantities for selection of the measured values. The measured values are
fed directly to the following registers to record the energy and the maximum
demand (in combimeters also of minimum power factor).
The active energy in the individual phases ±A1, ±A2 and ±A3 are formed
directly from the mean values of active power P1, P2 and P3.
ZMD400
+S (QI+QIV) Sum / Phases
-S (QII+QIII) Sum / Phases
U1, U2, U3
I1, I2, I3
I0 yes
f yes
n
±P Sum / Phases
±Q Sum / Phases
j U
U1-U2 / U1-U3* no
j U-I
U1-I1, U1-I2,
U1-I3 *
or
U1-I1, U2-I2,
U3-I3
PF Sum / Phases
yes
TTHD [0;1] Sum
A
TTHD [0:1] Phase 1, 2, 3
V
TTHD [0:1] Phase 1, 2, 3
I
TTHD [0:1] Sum
V
TTHD [0:1] Sum
I
OLA Sum
NLA Sum
±OLA Sum
±NLA Sum
2
U h Sum
2
I h Sum
21/96
ZFD400
Sum
Sum
U12, U32
I1, I3
no
yes
Sum
Sum
no
Sum
yes
Sum
Phase 1, 3
Phase 1, 3
Sum
Sum
no
no
no
no
Sum
Sum
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