Chapter 7
Monitoring
Meters
Viewing Real-time Harmonic Spectrum
128
EM13x Series SMART MULTIFUNCTION METER
PAS can give you indication on whether harmonic levels in the sampled
waveforms exceed compliance limits defined by the power quality
standards or local regulations.
To review or change harmonic limits:
Click on the spectrum window with the right mouse button and select
Limits…
.
Select a known harmonics standard, or select
Custom
and specify
your own harmonic limits.
Check the
Enabled
box to visualize harmonic faults on the spectrum
graph and in harmonic tables.
Harmonics that exceed selected compliance levels are colored in red on
the graph and in the tables.
Figure
7-4: Harmonic Limits
Viewing a Spectrum Table
Click on the
button on the local toolbar to display the harmonics
spectrum in a tabular view for a selected phase or for all phases
together.
The spectrum table shows voltage, current, active power and reactive
power harmonic components both in percent of the fundamental and in
natural units, and harmonic phase angles.
To change a phase, click on the window with the right mouse button,
select
Options...
, check the phase you want displayed, and then click
OK
.
