Technical Documentation
KSR-V – Capacitor-Bank Protection Relay
Rev. 05
12
5.4 Submenu "harmonics"
The KSR-V calculates harmonics for all input channels. Harmonics are available in the range from the
fundamental wave up to the 62nd harmonic. Both, even and odd harmonics are displayed in this submenu. If
th
e harmonic display quotes “not available”, the voltage, which sources the harmonic calculation is below a
certain limit or even not present. This makes the FFT calculation of the harmonics very inaccurate or
impossible.
At the top of the display there is the word "harmonics" followed by the data source (e.g. "U-L2"). The
harmonics are displayed in two columns: even harmonics on the left side (2, 4, 6, …), odd harmonics on the
right side (3, 5, 7, …). The numbers before the harmonic value give the order of the harmonic.
The harmonics are normalized to the fundamental wave and displayed in percent of it. The
fundamental wave is always 100.0%, because of this it is not displayed!
KEYS:
left key ("M") switches back to main menu
"
" - key scrolls the list of harmonics down to the harmonics of higher order
"
" - key scrolls the list back to the top (lower harmonics)
right key ("
") switches between the seven data sources (UL1-3 and V1-4)
Single harmonics, as displayed inside this menu, cannot be the source of alarms. Harmonic alarms should
use the THD as source, which contains information of all harmonics of one source in one single value.
