1-31
IM 253710-01E
Functions
1
Vector Display of Harmonics «For procedures, see section 9.9.»
During the harmonic measurement mode, the phase difference and the amplitude (rms)
relationships between the fundamental signal U(1) and the I(1) of the element that is
wired using wiring method A can be displayed as vectors. The vector of each input
signal is displayed with the positive vertical axis representing zero degrees. In addition,
you can zoom
*
in on the vector or display the values of the amplitude and the phase
difference between the signals simultaneously.
*
This is applicable to products (PZ4000) with firmware version 2.01 or later.
I1(1)
I3(1)
I2(1)
φ
2(1)
φ
1(1),
φ
U1-I1
φ
3(1)
φ
U1-U3
U1(1)
I1(1)
I3(1)
U3(1)
I2(1)
U2(1)
φ
U1-U2
φ
U1-I3
φ
U1-I2
O
U1(1)
I1(1)
I3(1)
U3(1)
I2(1)
U2(1)
O
U1(1)
U3(1)
U2(1)
φ
U1-U2
φ
U2-U3
φ
U3-U1
φ
2(1)
φ
1(1),
φ
U1-I1
φ
3(1)
φ
U1-U3
φ
U1-I2
U1(1)
I1(1)
I3(1)
U3(1)
I2(1)
U2(1)
φ
U1-U2
φ
U1-I3
Vector display when the wiring method is 3P4W (three-phase four-wire)
U1(1), U2(1), and U3(1) are common mode voltages. I1(1), I2(1), and I3(1) are line currents.
Vector display when the wiring method is 3V3A (three-voltage, three-current)
U1(1), U2(1), and U3(1) are line voltages. I1(1), I2(1), and I3(1) are line currents.
By moving the vectors, U1(1), U2(1),
and U3(1), (without changing their
orientations) so that the starting points
of vectors are all at the origin, the phase
relationship can be observed in the same
fashion as the three-phase four-wire method.
(The PZ4000 does not provide a function for
moving the vectors.)
The phase difference between the line voltages can
be determined from the phase difference measurement
functions
φ
U1-U2 and
φ
U1-U3.
φ
U1-U2 = This is the measurement function
φ
U1-U2.
φ
U2-U3 = (
φ
U1-U3) – (
φ
U1-U2) – 180
°
φ
U3-U1 = –(
φ
U1-U3)
Vector display when the wiring method is 3P3W (three-phase three-wire)
U1(1), U2(1), and U3(1) are line voltages. I1(1), I2(1), and I3(1) are line currents.
However, U3(1) and I3(1) are not actually measured for the three-phase three-wire
method. The vectors are displayed through computation.
1.6 Waveform Display