Descoupler is a set of embedded drainage and surge protector in one of the AC interference protection products, mainly used in buried long pipeline engineering. It can safely and effectively control the influence of AC stray current or lightning current on the pipeline to the buried pipeline and extend the service life of the pipeline. At the same time, it can prevent the harm to human body and the interference to the communication line after the stray current is collected on the pipeline.
When the pipe is connected to the ground pole through the DC de-coupler, the DC de-coupler can prevent the leakage of the cathodic protection current, because the DC de-coupler has the role of alternating and straightening. But this performance is achieved by internal capacitance.
It can not only effectively eliminate AC stray current and isolate DC, but also quickly discharge the overcurrent (surge current) to the earth, Ensure the safety of the pipeline in the pipe near the high voltage transmission line iron tower/communications tower, and grounding system, the parallel transmission lines and pipeline within the period of the public corridor, in the pipeline, and transmission lines cross location and electrified railway parallel section, install to coupler can effectively reduce the dc and ac stray current or lightning current's influence on the buried pipeline, Enhance the stability of pipeline cathodic protection potential measurement.