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In the UK and other European countries government – led initiatives to encourage alternate forms of energy have recently concentrated on wind farm developments. As many of these being placed in remote areas in particular, out at sea and there are high penalties for non-production, the rotating parts of these generators need to be continuosly monitored to warn of bearing and component wear so that remedial action can be taken to avoid failures.Both onshore and offshore sites use vibration monitoring as one of the main tools to obtain early warnings of mechanical and electrical defects to prevent major component failures. Vibration sensors used in conjunction with on-line monitoring systems mean many faults can be detected while the defective component is still operational giving time for repairs to be planned and avoiding loss of energy production. This is especially useful given the fact that poor weather conditions can hold up repairs for some weeks.
Vibration sensors are designed for the rough environments and provide high reliability. They are typically installed on the wind turbines to monitor vibration levels of the rolling bearings, gear units and drive train motors. The MTN/1100 family of accelerometers has been extensively used in this industry with higher sensitivity models used for slow speed applications.