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7.1.4. RMS DISPLAY SCREEN FOR THE NEUTRAL
This screen displays the neutral voltage with respect to earth and the neutral current.
RMS voltage and current.
Current and voltage axis with
automatic scaling.
Instantaneous value cursor. Use
the or button to move the
NOTE: Filters L1, L2, and L3 display the current and voltage in phases 1, 2, and 3, respectively. The screen is identical to
the one displayed for the neutral.
7.2. TOTAL HARMONIC DISTORTION
The THD sub-menu displays the waveforms of the signals measured over one full cycle and the total voltage and current harmonic
distortion. The levels are displayed either with the fundamental RMS value as reference (%f) or with the RMS value without DC as
reference (%r), depending on which reference is chosen in the configuration menu.
7.2.1. 3U THD DISPLAY SCREEN
This screen displays the phase-to-phase voltage waveforms for one period and the total harmonic distortion values.
Harmonic distortion for each
Voltage axis with automatic
Instantaneous value cursor. Use
the or button to move the
7.2.2. 4V THD DISPLAY SCREEN
This screen displays the phase-to-neutral voltage waveforms for one period and the total harmonic distortion values.
Harmonic distortion for each
Voltage axis with automatic
Instantaneous value cursor. Use
the or button to move the
cursor.
graph.
scaling.
cursor.
graph.
scaling.
cursor.
Figure 7-5
Figure 7-6
Figure 7-7
56
Instantaneous values of the signals at
the position of the cursor.
t: time relative to the start of the
period.
VN: instantaneous neutral voltage.
AN: instantaneous neutral current.
Instantaneous values of the signals at
the position of the cursor.
t: time relative to the start of the period.
U1: instantaneous phase-to-phase
voltage between phases 1 and 2 (U
U2: instantaneous phase-to-phase
voltage between phases 2 and 3 (U
U3: instantaneous phase-to-phase
voltage between phases 3 and 1 (U
Instantaneous values of the signals at
the position of the cursor.
t: time relative to the start of the period.
V1: instantaneous phase-to-neutral
voltage of graph 1.
V2: instantaneous phase-to-neutral
voltage of graph 2.
V3: instantaneous phase-to-neutral
voltage of graph 3.
VN: instantaneous value of the neutral
voltage.
).
12
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23
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