A METHOD OF TREATING COPPER SULPHIDE DEPOSITS IN AN ELECTRICAL APPARATUS BY THE USE OF OXIDISING AGENTS

摘要

A method of treating copper sulphide deposits on materials and surfaces that are in contact with electrically insulating oil inside an electrical apparatus, wherein a substantial amount of the electrically insulating oil, normally present in said electrical apparatus, have been removed. The copper sulphide is subjected to treatment with an oxidizing agent which causes a reaction with the copper sulphide deposits. The oxidizing agent can comprise any compound from the list; chlordioxide, a peroxy acid or ozone.