What influence do EMC filters have on the potentials and shield currents?
EMC filter circuits function optimally when as many impedances as possible of the prevailing interference model are known. With that, a targeted calculation for dimensioning an EMC filter is possible. This is based primarily on a clearly defined frequency range and as a result can cover "only" a limited work range. Therefore an EMC filter is capable in the first place to exert influence on surrounding potential only within these limits. However, mostly in a very high frequency range. Power influenced interference currents, for example on shields of data lines, feature their main perturbation potential in the higher frequency range and are accordingly hardly influenced.