Method for altering cable semiconductive layer

Details Method for altering cable semiconductive layer Method for altering cable semiconductive layer

1998-03-24

1999-10-26

Reichard, Dean A.

Electricity: conductors and insulators

Conduits, cables or conductors

Combined

174105SC, H02G 1502

Patent

active

059732660

ABSTRACT:
A method of altering a portion of the semiconductive layer of an electric power cable, to increase its resistance so as to render it electrically insulative. The semiconductive layer is loaded with carbon powder which forms chains to provide conductive pathways through the layer. By introducing an intercalant into the semiconductive layer, which causes the layer to swell, the conductive pathways are interrupted and the material is rendered insulative (>10.sup.4 .OMEGA.-cm). The intercalant may be a polymerizable material with a curing agent which is cured in situ, i.e., without removing the semiconductive layer from the cable. By this method, flashover to the semiconductive layer at a cable splice or termination may be prevented without requiring tedious removal of the exposed portion of the semiconductive layer. The method is usable with both strippable and coextruded semiconductive layers.

REFERENCES:
patent: 3644662 (1972-02-01), Salahshourian
patent: 4029830 (1977-06-01), Yamamoto et al.
patent: 4626618 (1986-12-01), Takaoka et al.

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