4 Measured Quantities and Recording
4.1 Power Quality Measuring System and Recording System
30 SICAM Q100, 7KG95xx, Device Manual
E50417-H1040-C522-A6, Edition 06.2019
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.
An 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
MAN_SICAM_Q100_US.book Page 30 Wednesday, June 5, 2019 9:31 AM
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