Transcription of ELECTRICAL PROPERTIES OF CABLE INSULATION MATERIALS
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ELECTRICAL PROPERTIES OF CABLE INSULATION MATERIALS
ELECTRICAL PROPERTIESOFCABLE INSULATION MATERIALSBRUCE S. BERNSTEINP aper-Insulated Lead Covered CablesPILC-FundamentalsINSULATION MATERIALS MEDIUM VOLTAGE Polyethylene[PE] Crosslinked PE [XLPE] Tree Retardant Crosslinked PE[TR-XLPE] Ethylene-PropyleneElastomers [EPR] PILC HIGH VOLTAGE Crosslinked Polyethylene PAPER/OIL Paper/Polypropylene [PPP] SF6 GasPILC CABLE is comprised of Paper strips wound overconductor with construction impregnated withdielectric fluid (oil) Long Service History Reliable/used since late 1800s Gradually being replaced by Extruded CablesPILC Paper derived form wood Wood Cellulose 40% Hemicellulose 30% Poor ELECTRICAL PROPERTIES Lignin 30% Serves as adhesive Cellulose must be separated from others Separation by bleaching sulfate/sulfite processPILC CELLULOSE- INSULATION material HEMICELULOSE-Non-fibrous more polar losses higher vs.
• Cable is comprised of Paper strips wound over conductor with construction impregnated with dielectric fluid (oil) • Long Service History ... for failure as a function of time (but not necessarily of voltage stress”) Dissado and Fothergill, Page 323. 10.00 100.00 1.00 5.00 10.00 50.00
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