Electrical conductor provided with a surrounding insulation

Details Electrical conductor provided with a surrounding insulation Electrical conductor provided with a surrounding insulation

1988-03-21

1990-06-19

Kendell, Lorraine T.

Stock material or miscellaneous articles

Coated or structually defined flake, particle, cell, strand,...

Rod, strand, filament or fiber

428384, 428389, 174110SR, 174110N, 174110PM, 174110S, 174120SR, B32B 2700, D02G 300

Patent

active

049353020

ABSTRACT:
An electrical conductor is provided with an electrical insulation (11) surrounding the conductor (10) and a surrounding protective layer (12) which protects the insulation against degradation caused by corona. The protective layer consists of an organic polymer containing at least 10 percent by volume of a powdered filler in the form of chromium oxide, iron oxide, or a mixture of chromium oxide and iron oxide. The filler preferably has an intrinsic resistivity of 10.sup.4 -10.sup.8 ohm m. The thickness of the protective layer is preferably smaller than the thickness of the underlying insulation (11) and its resistivity preferably exceeds 10.sup.10 ohm m. The conductor is used, among other things, in windings and coils for electrical machines.

REFERENCES:
patent: 3228883 (1966-01-01), DiGiulio
patent: 4403061 (1983-09-01), Brooks
patent: 4493873 (1985-01-01), Keane et al.
patent: 4537804 (1985-08-01), Keane et al.

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