Technical seminar | Power transformers and their insulating oils

  • When: 14-15 May 2019
  • Where: Rodestraat 125, 1630 Linkebeek, Belgium

Power transformers are vital components of the power supply infrastructure. Their reliability, availability, life cycle cost and residual life expectancy depend, to a great extent, on how they are operated and maintained. This technical seminar addresses, head-on, a compilation of the real and frequently asked questions on condition monitoring of power transformers that we regularly receive from operators, such as:

  • “We can see gassing in our insulating oils, but how can we be sure if it’s stray gassing or a real internal transformer problem?”
  • “Can we easily switch from uninhibited oil to inhibited grade or GTL oils, or do we need to take compatibility aspects into consideration?”
  • “Are there better ways to identify insulation paper degradation than the classic furanic analysis?”
  • “Does our oil analysis program need to be optimized for each transformer in our fleet, according to its type and current condition? If yes, how do we do this?”

Answers to these and many other burning FAQs will be shared in our two-day technical seminar: “Power transformers and their insulating oils: recent developments and best practices in condition monitoring”.

14-15 May 2019
ENGIE Laborelec, Linkebeek, Belgium
Duration: 2 days
Registration fee: 800€ (full price) 650€ (registration before 20/03)


Steve Eeckhoudt

Steve Eeckhoudt is currently a senior expert at ENGIE Laborelec. A specialist in insulating fluids, lubricating oils and power transformer and turbine condition monitoring. He is the author of a number of publications and has participated in international research projects on corrosive sulphur, oil additives, stray gassing, transformer ageing and condition assessment. Steve is a member of several IEC TC10 working groups (MT21, MT38) and CIGRE working groups (JWG D1/A2.47, D1.70) and is the current chairman of the Belgian NC IEC TC10.

Kevin Deville

Kevin Deville is a chemist, with technical expertise in transformer and lubricating oils, specializing in dissolved gas analysis, furanic compounds, and PCB analysis. Kevin is a member of IEC TC10 PT62701 Interfacial Tension, IEC Project Team 63012 and CIGRE JWG D1/A2.47.

Christine Koczab

Christine Koczab is a chemical engineer, bringing competences in lubricants, fuels, greases, and environmental issues to her specialist field in transformer condition monitoring based on oil analysis.


Koen Balman

An expert in condition monitoring of lubricants for rotating equipment, Koen Balman began his career in industrial oil blending before specializing in oil analysis. He joined ENGIE Laborelec in 2007 and his current responsibilities include lubricating oil analysis, specifically lubricating oil issues for turbines and other oil-filled equipment within the power sector. Koen is a member of ASTM D02; Petroleum products, liquid fuels and lubricants.

Bring your own case!

You are most welcome to bring cases and experience for discussion during the seminar. Our experts will offer their opinions, and you’ll also benefit from hearing from peers in other companies who may have had the same experiences.

Learn with Laborelec

Find out about oil condition monitoring and the best ways to remedy transformer oil issues.

Meet with Laborelec

Meet international experts in oil analysis and share experiences with colleagues.

Improve with Laboerelec

Learn to implement and use the most effective transformer oil strategies for your equipment.


Tuesday 14th of May

8:00 – Arrival and registration
8:30 – Welcome
8:45 – Introduction : ENGIE Laborelec: Oil activities

  • Some basics on transformer and its insulating materials
  • Ageing and failure of a power transformer and its insulating materials
  • Importance of selecting good quality transformer oil
  • Inhibited versus uninhibited oils 
  • Question & answer
10:30 –  Coffee break

  • Dissolved Gas Analysis (DGA) – Basic tool for transformer condition assessment (1) Some basics
  • How to implement and interpret analysis results (4 levels) 
  • Types of internal faults
  • IEC/IEEE Standards
  • Question & answer
12:15 – Lunch

  • Dissolved Gas Analysis (DGA) – Basic tool for transformer condition assessment (2) Relationship with water and breakdown voltage
  • Case studies
  • Question & answer
14:45 – Coffee break
  • Dissolved Gas Analysis (DGA) – Basic tool for transformer condition assessment (3) Offline versus online DGA monitoring
  • Stray gassing: what is it, how to identify and which actions can be taken
  • Case studies
  • Question & answer
17:00 – Closing day 1 

Wednesday 15th of May

8:00 – Arrival and registration

  • Focus on oil ageing and oil quality monitoring (1)
  • Wich analyses to perform
  • Standards
  • Typical values reporting
  • Question & answer
10:30 – Coffee break

  • Focus on oil ageing and oil quality monitoring (2)
  • Wich analyses to perform, standards & typical values reporting
  • PCB-analysis: context and recommendations
  • Question & answer
12:15 – Lunch

  • Focus on insulating paper ageing – best practices some basics
  • Influencing factors
  • Temperature-corrected furans
  • Importance of transformer dismantling(s)
  • Methanol as innovative paper ageing marker
  • Question & answer
14:45 – Coffee break

  • Focus on corrosive sulphur – best practices
  • Context and current status
  • Recommendations for unused oils in-service analysis methods & risks assessment
  • possible maintenance actions to reduce risk implemented actions within ENGIE Laborelec Fleet
  • Question & answer
17:00 – Closing day 2