INSULATION DEGRADATION DETECTING METHOD AND INSULATION LIFE PREDICTING METHOD

摘要

PROBLEM TO BE SOLVED: To obtain an insulation degradation detecting method capable of detecting degradation in an insulating layer at an early stage, by directly measuring the state of degradation in the solid insulation layer of an electric apparatus, and an insulation life predicting method capable of predicting the life (remaining life) of the insulating layer. SOLUTION: With attention given to resin hydrolysis considered to be one of chemical degradations in the solid insulating layer containing a resin, a coil insulating layer 2 is directly sampled and analyzed to detect and determine a specific organic acid, which is a resin hydrolysate.