Abstract
Aging tests have been carried out both on wire enamel and varnished wire enamel samples. The samples were tested for dielectric strength at 60 c/s at different stages of aging. After the insulation had been removed from the wire, it was analysed in an infra-red spectrometer. The spectra showed gradual changes with increased amount of aging, particularly in the CH stretching and OH stretching absorption bands. These data were correlated with other measured parameters of the material, particularly breakdown voltage, and the possibility of the existence of such a correlation has been found. The data from the spectra can also be used to determine an approximate value of the rate constant B of the Arrhenius equation.
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