Title: 40 Bender brukermanual.pdf.pdf
6.6.4 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 rated frequency. Example: Rated frequency = 50 Hz, 2nd Harmonics = 100 Hz. The RCMS…-D… can only determine the harmonics currents correctly if the selected rated frequency in menu "6. Settings-> General-> Rated frequ." suits 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.Channel:1 121mA THF3% 3mA 85mADC 1.THF:The total harmonic factor (THF) specifies the ratio of the har- monics r.m.s value of an alternating quantity to the funda- mental r.m.s. value. 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 65) the THF cannot be determined. The display indicates „- - -“ .