Satec Expertmeter EM720 Operation Manual page 211

Appendix E EN50160 Evaluation and Recording
Mains Signaling Voltage
EM720 Power Quality and Revenue Meter
selected in the meter in the range of 25 to 50 via the
EN50160 Advanced setup.
Interharmonic voltages are not evaluated if the supply
voltage crosses a voltage tolerance limit (±15% Un).
Target Values
The EN50160 does
interharmonic voltages. The ranges of interharmonic
voltages selected in the EM720 are:
• Interharmonic THD
• Individual interharmonic voltages shall be less than
or equal to the values given in the following table
for 95% of a week.
Interharmonic order
2
3-15
16-25
You can change the compliance limit for the interharmonic
THD via the EN50160 PQ Recorder setup. The individual
interharmonic voltage limits can be changed via the
EN50160 Harmonics setup.
This characteristic defines the magnitude of the signal
voltages used in some countries for signal transmission
over public supply networks. These may include ripple
control signals in a frequency range from 100 HZ to 3 kHz,
and carrier wave communications signals in a frequency
range from 3 kHz to 148.5 kHz.
The EM720 can evaluate ripple control signaling voltages
in a frequency range from 100 Hz to 3 kHz.
Method of Evaluation
Since evaluating signal voltages is not commonly used,
this feature is normally disabled in your meter. You can
enable evaluation of signaling voltages via the EN50160
Advanced Setup.
The EM720 evaluates up to four ripple control frequencies.
You can select the required signaling frequencies via the
EN50160 Advanced Setup.
The basic measurement is the magnitude of the signaling
voltage over a period of 3 seconds under normal operating
conditions.
Signaling voltages are not evaluated if the supply voltage
crosses a voltage tolerance limit (±15% Un).
not provide target
% for 95% of a week
≤ 2
Relative Voltage
0.2
1.0
0.5
limits for
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