Operation
43
CMS460-D_D00045_01_M_XXEN/07.2016
6.4.4
Menu 4: Harmonics
The analysis of the harmonics of the measured currents is displayed as a bar
and a current value. Harmonics are multiples of the nominal frequency.
Example: Rated frequency = 50 Hz, 2
nd
harmonic = 100 Hz.
CMS460-D can only determine the harmonic currents correctly if the rated fre-
quency in menu "6.Settings -> General -> Rated frequ." matches the current
being monitored.
At 50 or 60 Hz, the current value of harmonics 1…40 is displayed; at 400 Hz the
current value of harmonics 1…5 is displayed.
THF:
The total harmonic factor (THF) is expressed as the ratio of
the harmonics r.m.s value of an alternating quantity to the
r.m.s. value of the fundamental. The smaller the THF, the
more sinusoidal the current signal.
If 50 or 60 Hz are selected in the "Cut-off frequency" menu
(see page 54) the THF cannot be determined. The display
indicates "- - -" .
An analysis of the harmonics cannot be carried out in
disabled channels. The display indicates "- - -" .
Chan.:1 12A
THF
3%
DC
1A
1.
10A
Summary of Contents for LANTRAXX CMS460-D
Page 6: ......
Page 21: ...Installation and connection 21 CMS460 D_D00045_01_M_XXEN 07 2016 4 3 2 Wiring diagram ...
Page 26: ...Installation and connection 26 CMS460 D_D00045_01_M_XXEN 07 2016 ...
Page 28: ...Installation and connection 28 CMS460 D_D00045_01_M_XXEN 07 2016 ...
Page 66: ...Operation 66 CMS460 D_D00045_01_M_XXEN 07 2016 ...
Page 70: ...Tests service troubleshooting 70 CMS460 D_D00045_01_M_XXEN 07 2016 ...
Page 85: ......
Page 86: ......
Page 87: ......