PQube User Manual 2.1
Page 52 of 113
RMS Recordings
Events that include RMS recording will include
the exact same data in both a GIF graph file and
a CSV spreadsheet file. Voltage RMS recordings
give you a good overview of what happened
before, during, and after the event. RMS
recordings use the RMS
1/2
reading to get the
average reading over the course of a cycle.
Because your PQube records the average
reading per cycle, RMS recording cover more
time than waveform recordings.
Channels available in Events and Snapshots
L-N Voltage
L-L Voltage
N-E Voltage
Frequency (RMS graphs only)
Current
Earth Current
Analog Channels
Digital Input
Budeanu VARs and Fundamental VARs (CSV files only)
Voltage Dips
A voltage dip is a brief decrease in the line voltage. Dips are most typically caused by large loads
starting nearby or by faults elsewhere on the power system. Your PQube records voltage dips
according to IEC 61000-4-30 class A. A dip begins when the 1-cycle RMS of any voltage goes below
the threshold (90% of nominal by default) and ends when all voltages are above the threshold, plus
the hysteresis setting (90% threshold + 2% hysteresis = 92% by default). You can change the
threshold for voltage swells by changing the settings in the [Phase_To_Neutral_Events] and
[Phase_To_Phase_Events] sections of the Setup.ini file on your SD card.
Voltage Swells
A voltage swell is a brief increase in the line voltage. Your PQube records voltage swells according
to IEC 61000-4-30 class A. A swell begins when the 1-cycle RMS of any voltage goes above the
threshold (110% of nominal by default) and ends when all voltages are beneath the threshold,
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