DEHN protects pipelines
DEHN protects pipelines

Smart decoupling device VCSD

Avoid AC corrosion, limit overvoltage

The intelligent short-circuiting device VCSD 40 IP65 protects pipelines.

This Voltage Controlled Smart-Decoupling Device limits long-term, temporary and transient overvoltages caused by external voltages.
Without negatively affecting the desired DC potential.


External voltages arise from...

  • Electromagnetic fields
  • caused by high-voltage lines
  • Earth faults and short-circuits
    caused by high-voltage lines
  • Lightning interferences
    caused by thunderstorms
  • Stray currents
    caused by electric railways


The pressing issue:

External voltages may cause AC corrosion on the pipeline, personal injury and material damage.

With VCSD you are able to limit long-duration AC voltages to a pre-set value by means of the decoupling device. Without infuencing the required DC potential.

Fields of application

Typical fields of application are cathodically protected systems. Such as pipelines or storage tanks, indirect earthing of cable shields at accessible locations or corrosion-free connection of isolated earth-termination systems, e.g., signal ground. The VCSD limits overvoltages and their effects in its immediate vicinity to a safe level.


The main goals are:

  • Protection of the insulation of pipelines
  • Protection of devices and components
  • Reduction and prevention of AC corrosion
  • Personal protection in case of temporary and long-duration overvoltage (Limit values below the German AfK recommendation no. 3)


Your benefits with VCSD:

  • Flexible and controllable use in different fields of application
  • High discharge capacity
  • Tested, comprehensive and coordinated protection solution
Manfred Kienlein

Contact us

Manfred Kienlein | Global Account Manager Process Technology Oil/Gas

Phone: +49 9181 906 1401

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