Wind Turbine Slip Rings

Wind turbines require reliable transmission of power and data signals from the nacelle to the control system for the rotary blades. Moog’s slip rings provide the performance and quality needed in demanding environments. Costly downtime is eliminated by using fiber brushes and robust mechanical components in the slip ring design.

For more information about how wind turbine slip rings can be tailored to fit your specific application, contact our applications engineers.

Moog Slip Ring Advantages

  • Maintenance free for 100 million revolutions
  • Minimal wear debris generation
  • No lubrication required
  • Wide operating temperature
  • Lower life cycle cost
  • High reliability
  • No periodic inspections required


Model Description Signal Circuits Power Circuits
WP6807 Hydraulic / Electric Design  6 - 24;
10 Amps each continuous
All circuits can be paralleled
for 240 Amps max.
WP6808 Electric Blade Pitch Actuation 18 - 72;
10 Amps each continuous
20, 50, 100, 200, 300 Amp RMS continuous @ 600 V
WP58484 Power and signal transfer for small wind turbines 2 signals 3 power, 18 Amps up to 600 V

Replacement Solutions

Moog offers a WP7129 direct replacement pitch control slip ring for the NEG Micon NM72 / 82 wind turbines. Moog’s unit mounts directly to the gearbox with a through passage for the hydraulic lines and wiring.

Moog offers a WP7214 direct replacement pitch control slip ring for the Clipper Liberty wind turbine. Moog's unit provides a direct interface to the turbine gear box with mating connections for direct connection to the turbine wire harness.

Moog offers a WP7286 direct replacement pitch control slip ring for the GE wind turbines. The design bolts to the existing gear box and provides numbered terminal blocks to match the turbine wiring harness.

Moog offers a WP7347 direct replacement pitch control slip ring for the Mitsubishi MWT62/1.0 wind turbine. Our design bolts to the existing system and provides connectors connect to the stationary cables.

Moog offers a WP7358 direct replacement pitch control slip ring for the Suzlon S88 wind turbine. Moog’s unit provides direct connection to the gearbox with wire terminal connections in both the stator and rotor junction boxes. Each unit is shipped with a heater already installed for cold weather installations.

Moog offers a WP7390 direct replacement pitch control slip ring for the Siemens 2.3 MW wind turbine. This unit bolts to the existing system and provides cables to connect to the stationary junction box.

Custom Solutions

Moog offers the superior fiber brush technology that has an extensive lifetime of over 100 million revolutions. This technology does not require lubricants and is characterized by low wear generation for minimal maintenance. Also the temperature range and the packaging of this product matches the harsh conditions required by this industry. 

Our engineering department is available for consultation to help you tailor a solution to meet your requirements.

Discover Our High Reliability Wind Solutions

Watch members of Moog's wind team, Steve Black, Fabian Goeden and Adan Cabrera, display Moog's latest offerings including our newest wind turbine slip ring solutions from Moog Rekofa and condition monitoring for slip rings, at AWEA 2019.