AGGREGATE OF CATHODIC PROTECTION Russian patent published in 1996 - IPC

FIELD: equipment for protection of underground structures from corrosion and is used in realization of automated cathodic protection of different usage pipelines. SUBSTANCE: aim is to increase efficiency of aggregate of cathodic protection using method of maintaining data-sheet value of power in wide range of adjustable voltage. Aggregate has: direct current source, anodic output of which is connected with anodic ground; in series connected source of reference voltage, comparison unit and oscillator-modulator. In the case inputs of comparison unit are correspondingly connected with underground structure and electrode of comparison and output of ascillator-modulator is connected with control input of adjusting member, another input of which is connected with cathodic output of direct current source. Aggregate also has choke, current detector, valve unit, output voltage detector, power calculation unit, power limitation unit, data-sheet power maintaining unit. Adjustable member output is through choke and current detector connected to underground structure and through valve unit it is connected with direct current source anodic output. Output voltage detector is connected between anodic ground and underground structure, outputs of voltage detector and current detector are connected to inputs of power calculation unit, output of which is connected to first input of power limitation unit, to second input of which output of data-sheet power unit is connected. Output of power limitation unit is connected to input of reference voltage source. EFFECT: increased efficiency of aggregate of cathodic protection. 1 dwg