Transformer Insulating Oil Analysis


Course Duration: 8 Hours

This 8-hour practical course provides you with methods and procedures used internationally. This course will be discussing on predictive, periodic or condition based maintenance methodologies in oil filled power transformer maintenance. This will focus mainly on analyzing transformer insulating oils and what corrective actions can be done within the data given by the laboratory.


  • Have basic knowledge about transformer insulating oils.
  • Know different characteristics of transformer insulating oils.
  • Have knowledge on what tests to conduct in insulating oils.
  • Know proper sampling techniques in transformer tanks.
  • Interpret laboratory data and correct present abnormalities in the system.
  • Knowledge in present technologies in transformer and transformer oil maintenance.

Who Should Attend: 

This course will enhance the understanding and increase competencies for:

  • Engineers & technicians in the utility, transmission, and generation sectors that operate and maintain oil filled power transformer in substations.
  • Engineers and electricians in commercial and industrial field that maintains oil filled power transformers.
  • Electrical engineering graduates who would like to be test and applications engineers and Technicians for substation.

Topics to Be Discussed:

  1. Introduction to Insulating Oils and Power Transformer
  2. Characteristics of Insulating Oils
  3. Maintenance on Oil Filled Power Transformer and Oil Itself
  4. Mineral Insulating Oils Tests (ASTM, IEC and IEEE C57.104 Guidelines)
  5. Moisture in oil
  6. Sampling Techniques and Procedures
  7. Interpretation of Data (DGA and OQT)
    1. Most commonly used Techniques
    2. IEEE Guidelines C57.104
    3. Gas Ratios
    4. Duval’s Triangle
    5. Corrective actions
    6. New Tests and Technologies in the Industry
      1. Online and Offline Tests
      2. Dielectric Response Analysis
  8. Case Studies

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