The cathodic protection system, corrosion protection and monitoring unit (CPMU), makes it possible to monitor the electrochemical protection parameters of underground metal structures (pipelines), as a part of the linear telemechanics information control system. The unit is designed for operation in non-volatile telemechanics systems and be set up for various output power configurations.
The CPMU includes the controller module (CM) and the power converter modules (PCM). The number of installed PCMs determines the maximum output power of the unit.
During operation, the unit measures the output voltage, output current, protective potential of the structure, the voltage at the branch lines from the pipeline, and monitors the corrosion sensor.
The corrosion protection and monitoring unit can operate in three modes:
- stabilization of the output voltage;
- stabilization of the output current;
- stabilization of the total or polarization protective potential relative to the copper-sulfate reference electrode.
Communication with the upper-level controllers is via RS485 Modbus interface.