ABB i-bus KNX Product Manual page 128

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ABB i-bus KNX
Planning and application
The Delay for switching can be set separately for every monitored value (active power, current value, volt-
age), i.e. the parameterized switching reaction of the threshold value at undershoot or overshoot can only
be performed after the switching delay. Thus a brief undershoot or overshoot of a threshold value is al-
lowed. If the value 0 is selected here, the switching action occurs immediately after the evaluation delay
has been carried out.
Apparent power, power factor and crest factor cannot be monitored with threshold values, but are available
as communication objects for each output.
Note
The progression of the current and voltage curves is not analyzed, i.e., analysis of the signal waveform
(e.g. FFT) is not undertaken. All values are determined by sampling the signal.
Therefore, the power factor always results as the sum of the distortion power (e.g. dimmer currents) and
displacement power (e.g. inductive or capacitive loads). This power factor does not (or only in special
cases) comply with the cos φ (Cosine Phi ) with a phase displacement current!
It can also not be used for reactive power compensation!
126 2CDC 505 084 D0203 | SE/S 3.16.1