Life testing of electronic power transformers — II

This paper is a continuation and supplement of a previous paper on this same subject,¹ which deals with the accelerated life testing of small low voltage electronic power transformers. In this paper are reported the results of life tests which were incomplete at the time of the previous paper. Additional life tests under different conditions of the same insulation system and modified with a different layer insulation are also reported here for the first time. To present an integrated picture, the results previously reported are summarized here together with the additional and new data.