High-voltage cables

High-voltage cables developed specifically for wind turbine lightning protection systems

A key aspect of any LPS solution comprises the cables that are actually conducting the huge volumes of current and energy from a lightning strike safely through the turbine and into the ground – without damaging either the cable itself or its surroundings. Developed in-house, our lightning cables provide the perfect solution, featuring high performance, low costs and full flexibility.

It takes a special kind of cable to control the extreme electrical fields and huge energy discharges when lightning strikes
Lightning strikes constitute a major risk for wind turbines. So extra-special high-voltage cables are needed to protect these hi-tech marvels of engineering from the immense electrical fields that can cause sparks to fly through the air across distances of up to several kilometres. Added to this are the huge current surges and specific energies released at the time of the strike itself.

Drawing on our peerless expertise in lightning protection, Polytech has specially developed a range of high-voltage cables for LPS solutions in nacelles and wind turbine blades. These cables are distinguished by levels of flexibility and compatibility which, in the context of both electrical properties and mechanical adhesion, place them firmly in a class of their own.

Another feature of Polytech high-voltage cables is the fact that they are subjected to stringent tests in the same demanding category as cables used in the aeronautical industry. Combined with our inline SCADA quality supervision system, this ensures that each and every cable provides maximum performance and protection throughout the service life of the wind turbine in question.

Why choose Polytech high-voltage cables for your LPS solution?

  • Cables designed to conduct huge volumes of energy in an extremely short time
  • High performance – low costs
  • Exceed the requirements in IEC 61400-24, second edition
  • Tested in accordance with the IEC 60243-1, IEC 60143-3 and IEC 60060-1 standards
  • Effective securing in the blade thanks to the compatibility of the cable surface with all commonly used blade materials, resins and adhesion methods
  • Full effect, irrespective of operating environment
  • The actual down conductor is available in different materials (ALU/CU) and cross-sections
  • Configurable material types open the door to rigid or flexible cables, depending on the application and positioning in the blade or nacelle
  • External cable dimensions match applicable industry standards
  • Minimal corona formation on account of the special manufacturing process that effectively prevents cavities between the main conductor and the extruded semi-conducting layer.

  1. Aluminium or Copper Conductor (IEC Class 2 or 5)
  2. Extruded semi-conductive anti-corona layer with gap filling, specially developed TPE-S polymer compound
  3. Extruded insulating layer.
    PT2 family: Cross-linked PEX polymer compound (PT-C7-XL-Natural)
    PT6 family: TPE-V elastomer compound
  4. Superior anti-abrasive TPE-U environmental protection jacket
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