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The concept of accelerated functional testing of insulation materials and systems got great emphasis near the start of the second half of this century. This interest was spurred on when Dr. Dakin1 illustrated that insulation deterioration conformed to the Arrhenius chemical rate equation. The American Institute of Electrical Engineers (AIEE), recognizing the importance of this concept, organized the...
A unique test method for screening transformer insulation systems was presented in a paper (1) during the 1962 Electrical Insulation Conference. This test method referred to as "Progressive Temperature Testing" was based on increasing the test temperature in finite steps until the insulation system fails. The test temperatures and times were selected in accordance with the Arrhenius(2) relationship...
The most accepted method for the thermal evaluation of insulation systems(1) is based on the Arrhenius(2) equation. The Arrhenius equation, which describes the temperature dependence of the "velocity coefficient" of chemical reactions, is being used to approximate the relationship between insulation life and temperature. This equation indicates that the logarithm of insulation life should...
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