13.3 Measurement Specifications
182
Current unbalance factor (negative-phase unbalance factor, zero-phase unbalance factor) (Iunb, Iunb0)
Measurement method For 3-phase 3-wire (3P2W2M and 3P3W3M) and 3-phase 4-wire, calculated using 3-phase funda-
mental current component (For details, see "13.10 Calculation Formula" (p.198).)
Sampling frequency 200 kHz
Displayed item Negative-phase unbalance factor (Iunb), zero-phase unbalance factor (Iunb0)
Measurement range, resolution Component is A and unbalance factor is 0.00% to 100.00%.
Measurement band Fundamental component
Measurement accuracy -
Event threshold 0.0% to 100.0%
Event IN Start of approx. 200 ms aggregation in which reading was greater than the threshold
Event OUT Start of approx. 200 ms aggregation in which the reading was less than (threshold - hysteresis)
Multiple-phase system treatment None
Saved waveforms Event waveforms
High-order harmonic voltage component and high-order harmonic current component (UharmH, IharmH)
Measurement method The waveform obtained by eliminating the fundamental component is calculated using the true
RMS method during 10 cycles (50 Hz), 12 cycles (60 Hz), or 80 cycles (400 Hz) of the fundamental
wave (approx. 200 ms aggregation).
Sampling frequency 200 kHz
Displayed item High-order harmonic voltage component value:
RMS voltage for the waveform obtained by eliminating the fundamental component
High-order harmonic current component value:
RMS current for the waveform obtained by eliminating the fundamental component
High-order harmonic voltage component maximum value:
Maximum RMS value for the waveform obtained by eliminating the fundamental component for the
period from EVENT IN to EVENT OUT (leaving channel information)
High-order harmonic current component maximum value:
Maximum RMS value for the waveform obtained by eliminating the fundamental component for the
period from EVENT IN to EVENT OUT (leaving channel information)
High-order harmonic voltage component period:
Period from high-order harmonic voltage component EVENT IN to EVENT OUT
High-order harmonic current component period:
Period from high-order harmonic current component EVENT IN to EVENT OUT
Measurement range, resolution High-order harmonic voltage component: 600.00 V
High-order harmonic current component: Varies with current range; see input specifications.
Measurement band 2 kHz (-3dB) to 80 kHz (-3dB)
Measurement accuracy High-order harmonic voltage component:
10% rdg.0.1%f.s. (specified for 10 V sine wave at 5 kHz, 10 kHz, and 20 kHz)
High-order harmonic current component:
10% rdg.0.2%f.s. + clamp sensor accuracy (specified as 1% f.s. sine wave at 5 kHz, 10 kHz,
and 20 kHz)
Event threshold High-order harmonic voltage component: 0 V or greater, 600.00 V or less
High-order harmonic current component: 0 A or greater, current range or less
Event IN Start of approx. 200 ms aggregation in which reading was greater than the threshold
Event OUT Start of approx. 200 ms aggregation in which high-order harmonics were not detected during the
first approx. 200 ms aggregation following the IN state
Multiple-phase system treatment Separate by channel
Saved waveforms Event waveforms
High-order harmonic waveform
40 ms from the end of the first approx. 200 ms aggregation interval in which the reading was great-
er than the threshold (8,000 data points)
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