This fifth part of the article examines the significant contributions of Okabe to the statistical analysis and modeling of insulation behavior in EHV and UHV power transformers.
This is the fourth part of a historical look at transformer insulation testing which reveals how experts worldwide mapped out volt-time curves and PD probabilities.
The article is intended for young transformer engineers and for teaching transformers to undergraduate and postgraduate students in universities.
The second part of Vitaly Gurin’s column examines the data of Soviet scientists on the dependence of the electrical strength of insulation of power transformers on time in historical development.