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4 Measured Quantities and Recording
4.1 Power Quality Measuring System and Recording System
4.1
Power Quality Measuring System and Recording System
4.1.1
Measuring System
SICAM Q100 devices measure the power quality according to IEC 61000-4-30 in 1-phase or multi-phase
distribution systems.
The basic measuring interval for determining the values for mains voltage, harmonics of mains voltage, and
mains voltage unbalance is 10 cycles for 50 Hz distribution systems or 12 cycles for 60 Hz distribution systems.
A overview of the measured quantities demanded in according to IEC 61000-4-30, their measurement
uncertainty and measurement ranges is represented in the Chapter 4.3.1.
4.1.2
Flicker
The flicker measurement is performed according to IEC 61000-4-15.
The short-term flicker value Pst and long-term flicker value Plt are determined for phase-to-ground voltages
and delta voltages. The flicker measurement is performed on all 3 voltage channels.
Flickers appear with a frequency from 0.005 to 35 Hz. The instantaneous flicker value is displayed in
perceptibility units P.
SICAM Q100 measures the following flicker types:
•
Short-term flicker value Pst, determined over 10 min (short-term flicker), fixed
•
Long-term flicker value Plt, over 2 h (12 Pst values), fixed
•
Perceptibility Pinst
30
SICAM Q100, 7KG95xx, Device Manual
E50417-H1040-C522-A4, Edition 03.2018
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