Description of Unit
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D000030875 en q
– E350 series 2, 1-phase ZCF100Ax/Cx – User Manual
© Gyr
1.6.3
Signal Processing
The meter records active and reactive energy and can distinguish between
energy import and export in up to 6 rates (depending on configuration).
Calibration data is stored during the final testing of the meter.
The microprocessor compares the measured power with the minimum
starting power. The signals are only passed on if the minimum starting
power is exceeded.
The following energy values can be measured and stored in the registers:
Active energy A
Reactive energy R
Apparent energy S
+A and +R are the
imported
measured active and reactive energy,
–A and
–R the
exported
measured active and reactive energy.
The combined values are the sum or the difference of the absolute values
of +A and
–A or +R and –R.
The measurement of single quadrants can be configured too.
Energy type:
kWh, kVarh or kVah
Direction:
Import, export, ± reactive
Instantaneous Values:
Voltage, current, frequency, power factor
There are 8 (or 6
[M50…M53]
) independent measurement channels. One of the
measured quantities can be assigned to each of this register.
The measurement channels 1 to 6 have 6 rated registers and 1 total each,
channel 7 and 8 have only 1 total register. 44 registers are therefore avail-
able in total.
All registers work internally with 9 digits. The internal magnitude is Wh
(Watt-Hours). They cannot be reset. At 999999999, a rollover to 0 takes
place. The display and readout formats vary from the internal format.
The meter is designed for up to 6 rates. The assignment of the rate regis-
ters is done by means of parameterisation and is shown on the faceplate.
Rate control is performed by the external module.
With up to 2 rates, the rate switching is operated by the AMR Module directly
or by control inputs. The rate switching for more than 2 rates can be oper-
ated only by the AMR module.
The reactive energy (±Rc, ±Ri) is allocated to the 4 quadrants as follows:
+R
+ kWh
- kWh
-R
+Ri
+Rc
-Rc
-Ri
+A Import
Export -A
- kvarh
- kvarh
+ kvarh
+ kvarh
Quadrant II
Quadrant I
Quadrant IV
Quadrant III
Fig. 1.2 4-quadrant measurement
Calibration
Start detection
Measured quantities
Measurement
channels
Energy registers
Rates
Rate control
4-quadrant
measurement
