E-lesson
Insulating liquids test – lesson #3: Oil test priorities: specification, frequencies, limits

Course: Insulating liquids tests course
Intermediate level
Hosted by: Marius Grisaru / Intermediate level
This is the third lesson of the insulating test course and it is held on the intermediate level!
Topics of the third lesson are:
- Tests are recommended and required for each transformer type by each standard, with differences by transformer age
- Oil test limits according to standards
- Are they indeed critical, important, or nice to have?
- Which oil tests do I need for my transformer(s), frequencies, and limits?
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About the author

Marius Grisaru
The author – Marius Grisaru is a chemist with expertise in the insulating oil domain, focusing on oil test procedures from sampling to diagnosing. Marius has vast and worldwide experience on sampling, testing, ordering, diagnosing, and debating among fellow experts around the globe.