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Reference electrode
Continuous reference electrode for controlling the protective current device.
The reference electrode provides a stable, known electrochemical potential that hardly deviates over time. By comparing the voltage between the pipeline and the reference electrode, the polarisation potential of the protective elements in the ground can be determined. From this, it can be concluded whether the protective elements are still sufficiently protected or whether the current supply to the rectifier should be adjusted. Permanent reference electrodes are buried near the protective element and connected to the control system. Portable electrodes are used for measurements and must be placed consistently (as close as possible to the protective element, but not in the way between the anode and the protective element).
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