Waukesha® Service can provide almost any kind of field substation transformer testing, utilizing a wide range of knowledge and experience. These tests can be done to commission new or relocated units, as a part of routine maintenance or condition assessments, for diagnostics purposes or establishing benchmarks.

Have questions about transformer testing? Give us a call!

Power Transformer Testing
Power Transformer Testing
Power Transformer Testing


  • Doble® Power Factor Test of Windings
  • Doble® Power Factor Test of Bushings
  • Doble® Surge Arrester Test
  • Core Insulation Measurement
  • Transformer Turns Ratio
  • Winding Insulation Resistance
  • Winding Excitation
  • Winding Resistance
  • Current Transformer Ratio, Polarity and Saturation
  • Operational Check of Controls
  • Calibration of Gauges
  • Low Voltage Impedance Testing (Leakage Reactance)
  • Doble® Sweep Frequency Response Analysis
  • Phase Relation
  • Materials and Oil Testing
  • Oil General Chemistry
  • Dissolved Gas Analysis
  • Furfural Analysis
  • Particle Count
  • Metals-in Oil
  • Degree of Polymerization


Prolec GE Waukesha possesses the equipment, experience and capabilities to complete other service work you may elect to perform based on your test results, such as insulation dryouts, bushing replacements, LTC repairs/upgrades, natural ester retrofill, etc.; combining services can minimize costs and transformer downtime.