SciTech Connect

Title: Determination of threshold and maximum operating electric stresses for selected high voltage insulations: Investigation of aged polymeric dielectric cable. Final report

Determination of threshold and maximum operating electric stresses for selected high voltage insulations: Investigation of aged polymeric dielectric cable. Final report Based on the successful completion of the extensive research project DOE/ET/29303-1 February 1982 to develop a new method for the determination of threshold voltage in XLPE and EPR insulated cables, tests were initiated to establish the maximum safe operating voltage stresses of crosslinked polyethylene insulated cables that become wet when they operate in a moist environment. The present report covers the measurement of the threshold voltage, the a.c. breakdown voltage and the impulse breakdown voltage of XLPE cable after undergoing accelerated laboratory aging in water. Model and 15 kV XLPE cables were manufactured in commercial equipment using state-of-the-art semiconducting shields and XLPE insulation. The threshold voltage, a.c. voltage breakdown and impulse voltage breakdown of the model cables were determined before aging, after aging one week and after aging 26 weeks. The model cable, following 26 weeks aging, was dried by passing dry gas through the conductor interstices which removed moisture from the cable. The threshold voltage, the a.c. voltage breakdown and the impulse voltage breakdown of the XLPE model cable after drying was measured.
Authors: ; ;
Publication Date:
OSTI Identifier:212744
Report Number(s):DOE/RA/50156--T2
ON: DE96005619; TRN: 96:002402
DOE Contract Number:AC02-80RA50156
Resource Type:Technical Report
Data Type:
Resource Relation:Other Information: PBD: Nov 1995
Research Org:Cable Technology Labs., Inc., New Brunswick, NJ (United States)
Sponsoring Org:USDOE, Washington, DC (United States)
Country of Publication:United States
Language:English
Subject: 36 MATERIALS SCIENCE; BREAKDOWN; PROBABILITY; POLYETHYLENES; ELECTRIC POTENTIAL; CABLES; DRYING; MOISTURE; STRESSES; ELECTRICAL INSULATORS; DIELECTRIC PROPERTIES; CROSS-LINKING; COPPER