Sheath current filter

Using sheath current filters, ground loops causing mains hum and high frequency common-mode signals can be prevented.

Such ground breakers cannot be used in commercial satellite receivers, since low-frequency control signals and the supply voltage for the low-noise block converter have to be transferred.

They block to high-frequency common-mode currents above about 50 MHz and affect the signal and the ground connection is not in terms of their Low frequency properties or protective function.

Ferrite sheath current filters can only work effectively if a common-mode signal can flow on a line.

Transformer sheath current filters are used in low-frequency signal lines, where a ground loop otherwise can not be prevented.

Capacitive coupling filters can be used to prevent hum loops in antennas and radio frequency cables.