Transf. testing course - e-lesson #8 illustration

E-lesson: Transformer Testing Lesson #8: Lightning impulse test (part 2)

Course: Intermediate level

This is the second part of lightning impulse testing lesson, with focus on waveshape control and evaluation of oscillatory and high overshoot LI waveforms, including some examples of LI failure.

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This is the continuation of Lesson #7, where the attendees had the opportunity to learn about the basics and standards of lightning impulse testing of power transformers. The timeframe of one lesson was not enough to cover this topic fully, therefore next lesson of Transformer Testing Course will be the second part of LI testing lesson. Based on most of the audience’s questions, this lesson will focus on the waveshape control and evaluation of high-overshoot and/or oscillatory LI waveforms.

It will contain some examples of LI failure with fault description.

Keywords: Power Transformers, Transformer Testing, Lightning impulse, High voltage, Measurement


Balazs Sztari

Balazs 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.

Balazs Sztari

Ganz Electric

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