In the attached example a test grid is used to shown an example configuration for a FFT (Fast Fourier Transformation) element. The example includes two standalone composite models running in parallel, one using a three-phase FFT element and the other using a single-phase FFT element.

The three-phase ElmFft is processing the voltages at the terminals of a voltage source whose magnitude is defined by Fourier source signals (generated by ElmFsrc elements).

In both cases the recommended connection of a clock and Fourier Source element is shown. The outputs of the ElmFft elements are compared with the results of the FFT calculated by the frequency analysis command (ComFrequency).

For more information about the ElmClock, ElmFsrc and ElmFft elements refer to the corresponding technical reference.