Vibration analysis, oil sampling, and borescope inspection — how to combine them into a maintenance program that catches failures before they become catastrophic.
The gearbox is statistically the most expensive component to fail on a modern wind turbine. Unplanned replacement can cost EUR 250,000 to EUR 500,000 including crane mobilisation and lost production. A disciplined condition monitoring programme brings that risk down dramatically.
Three streams of evidence work together. Vibration analysis via a permanently-installed CMS captures early-stage bearing and gear-mesh anomalies. Periodic oil sampling reveals wear-metal trends and contamination. Annual borescope inspection confirms what the sensors suggest.
The mistake many operators make is treating these as separate reports. The value comes from correlating them. A rising iron count in oil, combined with a growing 1x-shaft vibration signature and a visible spall on a planet gear, tells a clear story that any one signal alone would miss.
Modern remote-monitoring platforms make this correlation practical at portfolio scale. But the human interpretation still matters — the analyst who has seen this failure mode before is the one who gets the intervention timing right.
