GE Grid Solutions Multilin 9450 - Polling through a Communication Port; Log Viewer; Performance Notes

CHAPTER 12: FLICKER AND ANALYSIS POLLING THROUGH A COMMUNICATION PORT
EPM 9450/9650 ADVANCED POWER QUALITY METERING SYSTEM – INSTRUCTION MANUAL 12–9
12.6 Polling through a Communication Port
The Pinst, Pst, Pst Max, Pst Min, Plt, Plt Max, Plt Min values can be polled through the
Communications Port. Refer to the EPM 9450 and EPM 9650 meters' Modbus and DNP
Mapping manuals for register assignments and data definitions.
12.7 Log Viewer
1. Open Log Viewer by selecting the Open Logs icon from GE Communicator's
Icon bar.
2. Using the menus at the top of the screen, select a meter, time ranges and
values to access.
3. Click the Flicker icon.
The values and the associated time stamps (when the values occurred) are displayed in a
grid box. Use the buttons at the bottom of the screen to create a graph or export the data
to another program.
• Graphed values include Pst and Plt Va, Vb and Vc.
• Displayed values include Pst and Plt Max and Min for Va, Vb and Vc.
NOTE
Note
Max and Min values are only displayed; they cannot be graphed. However, Max and Min
values are available for export.
12.8 Performance Notes
Pst and Plt average time are synchronized to the clock (e.g. for a 10 minute average, the
times will occur at 0, 10, 20, etc.). The actual time of the first average can be less than the
selected period to allow for initial clock synchronization.
If the wrong frequency is chosen (e.g. 50Hz selection for a system operating at 60Hz),
Flicker will still operate but the computed values will not be valid. Therefore, you should
select the frequency setting with care.
User settings are stored. If Flicker is on and power is removed from the meter, Flicker will
still be on when power returns. This can cause gaps in the logged data.
The Max and Min values are stored, and are not lost if the unit is powered down.
Flicker meets the requirements of IEC 61000-4-15 and former IEC 868. Refer to those
specifications for more details, if needed. Meters with the EN50160 option also meet the
EN50160 conformance standards for Flicker. Refer to the GE Communicator Instruction
Manual for additional information.
Operation is at 230V for 50Hz and 120V for 60Hz as per specification. If the input voltage is
different, the system will normalize it to 230V or 120V for computational purposes.