Doc# E145701 1-17
1: Three-Phase Power Measurement
Electro Industries/GaugeTech
™
Typically a waveform capture will be one or two cycles in duration and can be viewed
as the actual waveform, as a spectral view of the harmonic content, or a tabular view
showing the magnitude and phase shift of each harmonic value. Data collected with
waveform capture is typically not saved to memory. Waveform capture is a real-time
data collection event.
Waveform capture should not be confused with waveform recording that is used to
record multiple cycles of all voltage and current waveforms in response to a transient
condition.
1.5: Power Quality
Power quality can mean several different things. The terms "power quality" and
"power quality problem" have been applied to all types of conditions. A simple
definition of "power quality problem" is any voltage, current or frequency deviation
that results in mis-operation or failure of customer equipment or systems. The causes
of power quality problems vary widely and may originate in the customer equipment,
in an adjacent customer facility or with the utility.
In his book Power Quality Primer, Barry Kennedy provided information on different
types of power quality problems. Some of that information is summarized in Table
1.3.
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