Pulp insulation repair
AssigneeNorthern Telecom Limited
InventorWilliam P. Trumble
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Abstract
A compound for spray application onto pulp insulation on an electrical conductor, the compound comprising between 5 and 9 parts by weight of polyvinylpyrrolidone polyvinylacetate copolymer with 0.5 to 0.9 parts by weight of a copper corrosion inhibitor and 1.0 to 3.0 parts of a plasticizer. The compound is useful either to repair damaged pulp regions or for spraying the pulp during manufacture of an insulated conductor without substantially reducing the electrical insulating characteristics of the pulp.
Claims8
A fibreless compound for use as a spray material on pulp insulation consisting essentially of of an electrical conductor comprising from 5.0 to 9.0 parts by weight of polyvinylpyrrolidone-polyvinylacetate copolymer, from 0.5 to 0.9 parts by weight of a copper corrosion inhibitor and from 1.0 to 3.0 parts by weight of a plasticizer.
Dependencies are inferred from the claim text.