Abstract :
THIS DIGEST deals with the experimental application of functional test principles to the evaluation of temperature endurance of dry-type power transformers. The object of the tests described was not to test any specific design of dry-type transformers; rather, it was to give a trial run to a test procedure which was under consideration as a Test Code by a subgroup of the AIEE Working Group on Life of Materials. These, and similar tests made by four transformer manufacturers, along with a background of field experience, were used in formulating the “Proposed Test Code for Functional Temperature Endurance Tests of Ventilated Dry-Type Power and Distribution Transformers.”
