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Close to the wind

Wind energy with rotary transmission and complete connectivity solution
Frans Oudshoorn
Frans Oudshoorn
Global Product Manager, HARTING Customised Solutions
Wind energy with rotary transmission

Wind turbines already have large amounts of data to transmit today. And the trend is upwards. Sensors, control and communication data as well as the monitoring of the blades by means of HD video transmission all call for high-performance cables. On top of that, there’s another very special challenge: in addition to static components, "wind turbines" naturally have rotating components as well.

Connected: the rotary transmitter

Onshore (land) and offshore (sea) wind farms impose extreme demands on all materials. These materials are exposed to a harsh climate, fluctuating temperatures and salt water. When it comes to cabling, these requirements can be sufficiently met by robust connectors, secure fibre contacts and special cable glands. Still - how do you effect data transfer between fixed and rotating parts?

HARTING has developed its own fibre-optic bidirectional rotary transmitter especially for use in wind energy plants. This transmitter makes it possible to connect the static and rotating parts of the wind turbine by way of a fibre optic cable. For the wind turbine, this means a continuous connection from the tower bottom over the nacelle to the rotating blade tips. All the advantages of fibre-optic technology are fully exploited.

The connection goes even further

Connectivity is not just connecting two ends. As a customer-oriented, holistic concept at HARTING, connectivity means a complete system solution – tailored precisely to the customer's system. Complex in the background, nevertheless easy for the customer in terms of handling and maintenance.

The foundation is laid with trouble-free cabling to the highest quality standards. After this, the HARTING switch portfolio can be leveraged to effect interference-free signal transmission and signal processing. After all, sensitive fibre-optic connectors must be protected in harsh environments. This responsible task is handled by robust HAN® housings. Last but not least, the switch must be connected to the controller. Here, HARTING offers its proven Push-Pull quick connection technology.

Here, industrial customers benefit from services provided "under a single roof" along with customer-specific adjustments.


  • Robust, saltwater-resistant stainless steel housing
  • Bi-directional Ethernet data transmission
  • Temperature stable from -40° C to + 85° C
  • Robust ST connectors for safe contact of the fibre in/out of the rotary transmitter
  • Improved protection classes IP56 (if required, otherwise IP20)

For future decision-makers wind power turbine / plant construction

  • Connectivity concept for customer-specific connection variety
  • Secure data transmission in a robust industrial environment
  • Future-looking technology in robotics, crane industry, mining and more.


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