Power quality
9410 series
Power quality
Power quality overview
Your meter measures voltage and current harmonics, and calculates several harmonic
distortion values as well as K-factor and crest factor values.
You must configure your meter with nominal values for voltage, current and frequency
for the power system being monitored in order for the meter to perform power quality
calculations. Your meter also creates a phasor diagram, including numeric values for
magnitude and angle, to represent your power system.
Sag/swell overview
Your meter monitors your power system’s voltage and current for sags and swells
(INCITS (CBEMA) Type 2 and Type 3 disturbances); it then reports the disturbance’s
magnitude and duration.
You can manually enter the limits (criteria) used by the meter to identify a sag or swell,
or you can have your meter learn sag/swell limits by monitoring your power system.
Related Topics
•
Waveform recording overview
•
Configuring waveform recording using ION Setup
•
Implementing sag/swell limit learning using ION Setup
Harmonics overview
Harmonics information is valuable for power quality analysis, determining properly
rated transformers, maintenance and troubleshooting.
Harmonics are integer multiples of the fundamental frequency of the power system.
Harmonics information is required for compliance to system power quality standards
such as EN50160 and meter power quality standards such as IEC 61000-4-30.
Harmonics measurements include per-phase magnitudes and angles (relative to the
fundamental frequency of the phase A voltage) for the fundamental and higher
harmonics relative to the fundamental frequency. The meter’s power system setting
defines which phases are present and determines how line-to-line or line-to-neutral
voltage harmonics and current harmonics are calculated.
Harmonics are used to identify whether the supplied system power meets required
power quality standards, or if non-linear loads are affecting your power system. Power
system harmonics can cause current flow on the neutral conductor, and damage to
equipment such as increased heating in electric motors. Power conditioners or
harmonic filters can be used to minimize unwanted harmonics.
Viewing harmonics information using the display
You can view detailed harmonics data through your meter’s display.
1. Navigate to
Power Quality > Harmonics
. The total harmonic distortion (THD)
screens are displayed.
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