13.3 Measurement Specifications
185
10
13
Chapter 13 Specifications
Harmonic voltage phase angle and Harmonic current phase angle (including fundamental component)
(Uphase/Iphase)
Measurement method Uses IEC61000-4-7:2002.
Max. order: 50th
Anti-aliasing low-pass filter causes attenuation of frequencies other than measurement target of at
least 50 dB.
Analysis window width 10 cycles (50 Hz), 12 cycles (60 Hz), or 80 cycles (400 Hz)
No. of window points Rectangular, 4,096 points
Displayed item After harmonic analysis, the harmonic phase angle components for whole orders are displayed.
(Reference channel’s fundamental wave phase angle must be 0)
Measurement range, resolution 0.00 to 180.00
Measurement accuracy -
Event threshold N/A
Harmonic voltage-current phase angle (including fundamental component) (Pphase/ )
Measurement method Uses IEC61000-4-7:2002.
Max. order: 50th
Anti-aliasing low-pass filter causes attenuation of frequencies other than measurement target of at
least 50 dB.
Analysis window width 10 cycles (50 Hz), 12 cycles (60 Hz), or 80 cycles (400 Hz)
No. of window points Rectangular, 4,096 points
Displayed item Indicates the difference between the harmonic voltage phase angle and the harmonic current
phase angle.
Harmonic voltage-current phase difference for each channel and sum (total) value for multiple
channels (For details, see "13.10 Calculation Formula" (p.198).)
Measurement range, resolution 0.00to 180.00
Measurement accuracy At 50/60 Hz:
1st to 3rd orders : 2
4th to 50th orders: (0.05×k+2) (k: harmonic orders)
At 400 Hz:
1st to 10th orders: (0.16×k+2) (k: harmonic orders)
Note1: However, clamp sensor accuracy is added.
Note2: Specified with a harmonic voltage of 1 V for each order and a current level of at 1% f.s. or greater.
Event threshold Specified from 0 to 180 in 1 intervals.
Event IN Start of approx. 200 ms aggregation in which the absolute value is greater than the threshold.
Event OUT Start of the approx. 200 ms aggregation in which the absolute value is less than (threshold - hys-
teresis) in the EVENT IN state.
Multiple-phase system treatment Separate by channel
Saved waveforms Event waveforms