#### Transformers Magazine, Vol. 8 No. 4, 2021.

Original scientific paper

**What is the probability of a power transformer breakdown when repeating dielectric tests?**

Vitaly Gurin

###### Abstract

Analysis of the time to insulation breakdown of 111 power transformers with ACSD test and 300 insulation models allowed us to determine the probability of breakdown when repeating tests at the factory within 10-30 % (depending on the type of test).

###### Keywords

ACSD test, SI test, LI test, LIC test, power transformers, probability of breakdown, ZTZ

###### Hrčak ID:

263851

###### URI

###### Publication date:

8.10.2021.

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