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Technical Product Information | 2011-04
Current-Insulating Bearings
Rolling bearings for prevention of damage due to current passage

 
 
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CURRENT-INSULATING BEARINGS
Current-Insulating Bearings

Rolling bearings for prevention of damage due to current passage
Current-Insulating Bearings

 
INTERACTIVE ANIMATION
Wind Power - Interactive Animation

Find information about Schaeffler products and services for rotor shafts, gearboxes, generators, wind tracking and blade adjustments.

"Wind Power" - interactive animation

 

Generator

Generators in wind turbines

Challenges for the bearing support

Generators in wind turbines are subject to high vibration loads. This additional permanent load has a negative influence on the cages and places strain on the lubricant.  

  • High speeds
  • High temperatures
  • High vibration loads
  • Risk of the passage of current
 
 
 
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  CURRENT INSULATION PROVIDED BY A COATING (INSUTECT A)
Current insulation provided by a coating (Insutect)
 
Current insulation provided by a coating (Insutect)
 
 

Advantages

  • Highly wear-resistant insulating layer
  • Breakdown voltage up to 5,000 volts DC
  • Also suitable for damp environments
  • Good conductor of heat
  • Interchangeable with standard bearings

Features

  • Aluminum oxide ceramic layer
  • Different coating types are available for optimum functional performance
 
  CURRENT INSULATION PROVIDED BY CERAMIC ROLLING ELEMENTS
Current insulation provided by ceramic rolling elements
 
Current insulation provided by ceramic rolling elements
 
 

Advantages

  • Maximum protection against passage of electrical current
  • Low wear in the rolling contact
  • Longer bearing and grease operating life
  • Suitable for high speeds
  • Good emergency running characteristics
  • Rolling elements are resistant to chemicals
  • Interchangeable with standard bearings

Features

  • Hybrid bearing
  • Ceramic rolling elements
  • Same dimensions as standard bearings