Nowe podejście do problemu zakłóceń w sieciach przemysłowych niskiego napięcia

This article describes problem caused by low insulation resistance and methods continuous monitoring of residual currents in earthed industrial networks or insulation resistance in unearthed networks. Especially phenomenon caused by energoelectronic converters are taken into account, like DC leakage currents, large earth capacitances, high harmonic distortions. Methods are described separately for earthed (TN, TT) and for unearthed (IT) systems. Additionally article shows possibility of continuous insulation condition control of unsupplied motors, to keep them on standby.