8 Specifications
132
Quick Start Manual
Voltage Unbalance Factor
Measurement method
For three-phase 3-wire (3P3W3M) and three-phase 4-wire sys-
tems, calculation is based on the three-phase voltage funda-
mental waveform (line-to-line voltage, refer to the calculation
formula for details - Instruction Manual (CD-R version))
Current Unbalance Factor
Measurement method
For three-phase 3-wire (3P3W3M) and three-phase 4-wire sys-
tems, calculation is based on the three-phase current funda-
mental waveform (line-to-line current, refer to the calculation
formula for details - Instruction Manual (CD-R version))
∆U Voltage Fluctuation
Measurement method
Deviation in RMS voltage with respect to the standard voltage
Standard Voltage
Nominal voltage
S(t) Instantaneous Flicker value
Measurement method
Per IEC61000-4-15
Weighting filters
230 V lamp 50 Hz system, 120 V lamp 60 Hz system
∆V10 Flicker
Measurement method
Calculated using the “∆ V10 perceived flicker curve”.
Displayed items
∆ V10 measured at one minute intervals, average value for one
hour, maximum value for one hour, fourth largest value for one
hour, total (within the measurement interval) maximum value
Standard Voltage
Automatic (AGC)
Measurement accuracy
±4%rdg.±0.01V (For 100 V RMS fundamental wave (50/60 Hz),
1 V RMS fluctuating voltage, and 10 Hz fluctuating frequency.)
IEC Flicker : short interval flicker value Pst and long interval flicker value Plt
Measurement method
Per IEC61000-4-15:1997+A1:2003
Pst and Plt are calculated from continuous measurement over
10 min. and 2 hours, respectively
The 100 V lamp is per IEC SC77A National Committee,
"IEC61000-4-15 Flickermeter Conformity Discussion Report
for 100 Series Flicker Meter Ad-Hoc W/G"
Flicker filter
120V lamp, 230V lamp
Measurement accuracy
Pst: ±5% rdg.(as set forth for IEC61000-4-15 performance test-
ing)
Valid for input ranging from 50 to 100% of the voltage measure-
ment range
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