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12.1.5.3 Curve names
The curve names are selected to reflect their origin and subsequent processing. They consist of a series of tags which
describe the course of calculations performed on them. Each tag is linked to the next by an underline. This is
illustrated in the example below:
Fig 1-3 Designation of a channel for the 5th harmonic
The figure shows the channel designation for an upper harmonic. The input signal is the conductor voltage on the first
conductor U1. This is decomposed into its spectral lines by means of an FFT. Only the values of the 5
(250 Hz) are used to derive the mean value later on.
Bold and italic entries are required for the EN 50160.
Tag
_fft
_signal
_rms
_min, _max, _mean
_harm00
_harm05
fr01..fr10
_redu
U_, I_
P; _P
_S
_Q
W_imp
W_exp
_Phase
_Lambda
_event
_pst, _plt
_pf5
Symmetry_Zero
Symmetry_Positive
Symmetry_Negative
unbalance
_Histogram
Definition
spectrum with Fast Fourier Transformation
signal frequency (FFT)
effective value
minimum, maximum, mean value
th
upper harmonics, 0
to 50
spectrum components determined by FFT
freely selectable frequency (interharmonic) 1...10
curve plot (data reduction)
voltage, current
power (generally); active power
apparent power
reactive power
imported / consumed energy
exported / generated energy
phase angle
power coefficient
high-resolution, triggered recording of original signal
short-term flicker, long-term flicker
flicker momentary value
symmetric zero sequence system
symmetric positive sequence system
symmetric negative sequence system
asymmetry (negative/positive*100)
frequency distribution
th
th
(25
) order
Power Quality Recorder SICAM Q80 7KG8080, Operating instruction
E50417-B1074-C419-A2, Release 12.01.2015
Computations
E-63
th
harmonic
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