Stranded conductor filling compound of low molecular weight polymer and water swellable organic material
US5049593A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 5, 1989 |
| Grant date | Sep 17, 1991 |
| Priority date | — |
| Expiry date | Apr 5, 2009 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02A30/14
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A water migration resisting filler for filling the interstices of a stranded conductor, an electrical power transmission cable including such filler and a method of making such cable. The filler includes a polymeric compound having a 100 gram needle penetration value between 50 anad 100 tenths of a millimeter at 25.degree. C. and particles of a water swellable material having a particle size of not greater than 20 microns are in contact with the polymeric compound either by admixing it with the compound or applying it to the surface thereof. In the method, the polymeric compound is flowed around the wires of the conductor as they are stranded together and the water swellable material is either admixed with the compound or applied thereto as the conductor is formed, a semi-conductive layer is extruded around the so-filled conductor and a layer of insulation is extruded around the semi-conductive layer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.