Unlocked by Intellirent: Transformer Testing Course – e-lesson #17: Capacitance and dielectric dissipation factor measurement

Hosted by: Balazs Sztari / Master's level
In this lesson, you will learn about the AC insulation test method for the capacitance and loss factor. Lesson is hosted on Master's level.
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This is e-lesson #17 in Transformers Testing course, authored and presented by Balazs Sztari. It is presented on the Master’s level.
The 17th lesson of the Transformer Testing Course focused on capacitance and dielectric dissipation factor (DDF) measurement in power transformers. These measurements are crucial for assessing insulation quality during factory acceptance tests (FAT) and on-site commissioning. The session covered the relevant standards, theoretical background, instrumentation, test procedures, influencing factors, and practical applications for transformers and capacitor bushings.
Overview of Transformer Testing Topics
The current lesson introduced capacitance and DDF testing, focusing on:
- Standard references
- Theoretical concepts
- Instrumentation and test procedures
- Capacitance and dissipation factor measurement for windings and insulation
- Testing of capacitor bushings
- Factors influencing measurement results
The content of this lesson is fully vendor agnostic but it is sponsored by Intellirent!
About the author
Balazs Sztari
Ganz ElectricBalazs Sztari graduated as electrical engineer in Budapest. Beside of factory acceptance tests, his team performs commissioning, diagnostics and R&D tests on power transformers and rotating machines.
He is currently a member of Cigre A2.53 working group.