UMG 96-PA / UMG 96-PA-MID / UMG 96-PA-MID+
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56
Fig.
Selection list with voltages and currents to
display the harmonics.
·Use buttons 3 (
) and 4 (
) to select the
respective voltage or current and confirm with
button 6 (
Enter
).
·The
Harmonics
window of the selected mea-
sured value appears.
Fig.
Measuring display for harmonics
(e.g. Voltage L1)
13.11 Harmonics current (harmonics)
Harmonics current (harmonics)
are caused, for
example, by equipment with non-linear charac-
teristics. These additional frequencies represent
the integral multiple of a fundamental oscillation
and show how the equipment affects the mains.
Possible effects of harmonics are, for example:
·Additional heating of operating equipment.
·An additional current on the neutral conductor.
·An overload and a reduced service life of electri-
cal consumers.
Harmonic loads are the main cause of invisible
power quality problems involving enormous costs
for servicing and investments for the replacement
of defective equipment.
The device measures the fundamental oscillation
of the voltage in the range of 45 - 65 Hz. The
calculated harmonics of the voltages and currents
refer to this fundamental oscillation.
The
UMG 96-PA
and
UMG 96-PA-MID/MID+
calculate harmonics of up to 40 times the funda-
mental oscillation.
·If you are
not
in the measuring display
Home
,
you can go to this view by pressing button 2
(
Home
).
·Open the menu with button 1 (
Menu
).
·Use buttons 3 (
) and 4 (
) to select the item
Harmonics
and confirm with button 6 (
Enter
).
·A selection list appears with voltages and cur-
rents for the display of the harmonics.
