Corrosion protection device comprises protective current unit electrically connected on one side to pipeline and on other side to buried anode, and protective arrangement against influence of alternating current

摘要

A corrosion protection device comprises a protective current unit (2) electrically connected on one side to a pipeline (4) and on the other side to a buried anode (5); and a protective arrangement (9) for protecting against the influence of an alternating current. Preferred Features: A diode (11) is arranged parallel to an electrolyte capacitor (6). A switch (12) is integrated in the protective arrangement to protect against transient surge voltage. The switch has a varistor divertor having a measuring voltage of at least 1000 V.