21
7. KEY (Harmonics)
This key displays the levels of harmonics of the
voltage, current, and apparent power by order. It
can be used to determine the harmonic currents
produced by nonlinear loads and analyse the
problems engendered by these harmonics as a
function of their order (heating of the neutral, of the
conductors, of the motors, etc.).
7.1 Sub-menus available
These are listed in the screen below and described
individually in the sections that follow.
HA1A
1 2 3 4 5 6
Figure 34: Example of display of Harmonics.
Item Sub-menus See
1. Analysis of the harmonics of the
voltage.
7.2
2. Analysis of the harmonics of the
current.
7.3
3. Analysis of the harmonics of the
apparent power (*).
7.4
4. Sequences of voltage harmonics (*). 7.5
5. Sequences of current harmonics(*). 7.6
6. On-line help in this mode.
(*): these sub-menus are not available with a balanced
three-phase connection.
HA99
Figure 35: The 3
φ
sign at the top of the screen indicates a
three-phase configuration.
7.2 Voltage
This sub-menu displays the harmonics of the voltage.
The information displayed is read as follows.
1 2 3 4 5
HA1A
6 7
Figure 36: Example of display of harmonics of the voltage.
Item. Function
1. Reminder of the mode used.
2. Instantaneous frequency.
3.
This information concerns the harmonic located
under the cursor (see item 7).
Vh xx: number of the harmonic.
%: level of the harmonic with respect to the
fundamental (order 1).
v: RMS voltage of the harmonic in question.
+000: phase shift with respect to the fundamental
(order 1).
Max – Min: indicators of the maximum and
minimum of the level of the harmonic in question
(reset at each change of harmonic number).
THD: total harmonic distortion (also called THD-F).
4. Current date and time.
5. Battery charge level.
Table continued on page 22.
To Next Page
Loading...
Need help?
General
