E-Mon E-PS-A-RTU-N - Manual (Page 88)

Chapter 4 Power
S O F T W A R E E N 5 0 1 6 0 E V A L U A T I O N A N D
R E C O R D I N G
88 PowerSmart+ Advanced Power Quality Meter
recorded at the end of each evaluation period, file also contains data that may be useful for
trouble-shooting power quality problems for non-compliant voltage characteristics.
You can upload and view the EN50160 compliance statistics data via Power Software
reports or via common Power Software data logs views.
EN50160 Harmonics Survey Log
Data log file #10 is automatically configured in the PowerSmart+ Advanced PQM for
recording harmonics survey statistics on a weekly or daily basis. You can see parameters
recorded to the file in Appendix E. The file stores maximum THD (total, odd and even
harmonics) and maximum harmonic voltages up to order 50 collected within each
evaluation period.
Harmonics survey is normally intended for trouble-shooting harmonic problems throughout
electrical networks. It can be separately disabled or enabled in your meter via the EN50160
Advanced Setup. The evaluation period for harmonics survey can be selected
independently from the EN50160 compliance evaluation.
You can upload and view the harmonics survey data collected by your device via Power
Software reports or via common Power Software data logs views.
EN50160 Power Quality Event Log
The PowerSmart+ Advanced PQM provides the EN50160 Power Quality (PQ) recorder that
can detect EN50160 incidents and record each individual power quality event to the log file
with the start and end timestamps and a fault magnitude. It may be useful for trouble-
shooting problems throughout the electrical network, for example, to identify and locate the
source of a power quality event and to select an appropriate solution.
The EN50160 power quality report can be uploaded and viewed via Power Software (see
Viewing EN50160 Power Quality Event Log ). Transient overvoltages and short-duration
voltage dips and temporary overvoltages recorded to the file can also be viewed in Power
Software as magnitude/duration pairs on the well-known ITIC curve chart for assessing the
minimum equipment immunity.
The PQ recorder is programmable to trigger the waveform recorder to record the fault
waveforms before, during and after the PQ event for detailed event analysis.
Methods of Evaluation Methods of Evaluation Methods of Evaluation Methods of Evaluation
This section describes methods used by the PowerSmart+ Advanced PQM for evaluating
supply voltage characteristics to ensure compliance with the standard.
Frequency Variations
Method of Evaluation
The basic frequency measurement is the mean value of the frequency over fixed time
intervals of 10 seconds under normal operating conditions.
A frequency variation is not evaluated if the supply voltage crosses a voltage tolerance limit
(±15% Un).
Target Values
The ranges of frequency variations given in the EN50160 are:
50Hz±1% for 95% of a week
50Hz±1% for 99.5% of a year
50Hz+4/-6% for 100% of the time
The same limits are used for 60Hz systems. The frequency compliance limit can be
programmed in the meter in percent of the nominal power frequency via the EN50160 PQ
Recorder setup.