FIELD: electrical engineering.
SUBSTANCE: invention relates to cathode protection appliances and methods. Proposed system comprises transformer, rectifier with its positive terminal connected, via rectified voltage filter, with anode earth electrode, 1st and 2nd silicon gates with their anodes connected to each of protected structures. It comprises also the 1st and 2nd power frequency keys, 1st and 2nd frequency filters, 1st and 2nd frequency key control units, 1st and 2nd adders of protection potential correction magnitude, analog signal inverting repeater and protection potential difference differential amplifier.
EFFECT: higher efficiency of cathode protection, lower power losses.
1 dwg
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