Harmonics
Harmonics are the integer multiple of a mains frequency.
The voltage mains frequency for the UMG 96RM-M must
be in the range between 45 and 65 Hz. The calculated
voltage and current harmonics refer to this mains
frequency.
Harmonics up to 40x the mains frequency are recorded.
The harmonics for currents are given in amperes
and the harmonics for voltages are given in volts.
Fig. Display of the 15th harmonic of the current
in the L3 phase (example).
Number of the harmonic
Phase L3
Current harmonic
Value
C
Harmonics are not displayed in the factory
default setting.
Total Harmonic Distortion (THD)
THD is the ratio of the root mean square value of
harmonics to the root mean square value of the mains
frequency.
Phase L3
Voltage
Value
Fig. Display of the total harmonic distortion
of the voltage from the L3 phase (example).
Total Harmonic Distortion of the current (THDI):
Total Harmonic Distortion of the voltage (THDU):
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