What diagnostic methods are used to assess the condition of a traction transformer?

Diagnostic methods include visual inspections, thermal imaging to detect hotspots, oil testing (such as DGA), insulation resistance measurements, and partial discharge testing. Vibration analysis and acoustic monitoring can identify mechanical issues. Advanced diagnostics may use online monitoring systems to continuously assess parameters like temperature, load current, and gas levels. These methods help identify potential problems early, allowing for timely maintenance and reducing the risk of unexpected failures.