How to design power frequency magnetic field immunity for power line carrier PLC?

Power frequency magnetic field immunity design for power line carrier PLCs requires shielding and compensation techniques. A shielding cover with a thickness of 0.5mm or more should be made of a high-permeability material (such as permalloy). In PCB layout, the area of sensitive loops should be minimized, and differential signal transmission should be used. For magnetic components such as transformers, symmetrical winding methods should be used to cancel magnetic field interference. The shape of the shielding cover should be optimized by simulating and analyzing the magnetic field distribution. In actual testing, a 100A/m power frequency magnetic field test should be conducted according to the IEC61000-4-8 standard; the system should exhibit no abnormalities. This power frequency magnetic field immunity design allows the system to operate stably near power transformers and is suitable for environments such as substations.