AC Capacitor
AssigneeSprague Electric Company
InventorAndrew Dequasie
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Abstract
AC life and corona characteristics of a polypropylene-aluminum foil or a metallized film wound capacitor are improved by coating at least the ends of the capacitor with a partially cured urethane containing unreacted isocyanate groups.
Claims13
An AC capacitor comprising a convolutely wound capacitor section of electrodes separated by dielectric films, lead attachments to said electrodes extending from at least one end of said section, a coating over at least both ends of said section and said lead attachments, and an outer protective casing over said section, said coating being partially cured urethane with about 50% to about 75% unreacted isocyanate groups to improve both AC life and corona properties of said capacitor.
Dependencies are inferred from the claim text.