- Cathodic protection rectifier
Cathodic protection rectifiers are AC-powered
electrical equipmentthat provide direct currentfor impressed current cathodic protection systems.Rectifier units are often custom manufactured and equipped with a variety of features, including oil cooling, automatic output adjustment, various type of electrical enclosures, remote monitoring, remote output adjustment, an AC electrical outlet, selectable AC input setting, three phase AC input.
The rectifier output DC negative terminal is connected to the structure to be protected by the cathodic protection system.The rectifier output DC positive cable is connected to the auxiliary
anodes.The AC power cables are connected to the rectifier input AC cable terminals.
The output of the rectifier is usually determined by a cathodic protection expert to optimize the level of protection on the target structure. Many rectifiers are designed with tap on the
transformerwindings and jumper terminals for connection of jumper bars. The jumper bars or tap bars are moved between taps to vary the voltage output of the rectifier unit.
Rectifiers for water tanks and used in other applications are made with solid state circuits to automatically adjust the operating voltage to maintain a target current output or structure-to-electrolyte
digitalmeters are often installed to show the operating voltage (DC and sometime AC) and current output. Typically a shunt circuit composed of a calibrated resistorand voltmeteris used for current output measurement.
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