Development of extruded dielectric underground transmission cables rated 138 kV, 230 kV, and 345 kV. Final report

Technical Report · Mon Feb 01 04:00:00 EST 1982

OSTI ID:5240593

Bahder, G; Bopp, L A; Eager, G S; Katz, C; Knott, A; Schmidt, G A

This report covers the continuation of the work to develop technology to manufacture chemically crosslinked polyethylene insulated power cables in the ac voltage range of 138 kV to 345 kV having insulation thicknesses approximately equal to that of oil impregnated paper insulated cables. It also incorporates the development of field molded splices and terminations for new high voltage stress 138 kV cables. After reviewing the main equipment elements, incorporated in the pilot extrusion line, the special features of this system are noted and a step-by-step description of the cable extrusion process is given. Optimization of the process and introduction of modifications in the equipment culminated with the production of 138 kV cables. Results of laboratory tests to demonstrate the high quality of the cables are given. The development of molded splices and molded stress control cones was initiated with the work on model cables and followed by the making of splices and terminations on 138 kV cables. The molded components are made with the same purified insulating compound as used in the manufacture of the cables. Both the molded splices and the molded stress control cones have been fully tested in the laboratory. Following the completion of the development of the 138 kV cable a high stress 230 kV crosslinked polyethylene cable was developed and optimized. A full evaluation program similar to the one utilized on the 138 kV cable was carried out. Subsequently, work to develop a 345 kV high voltage stress cable, having insulation thickness of 1.02'' was undertaken. 345 kV cables were successfully manufactured and tested. However, additional work is required to further optimize the quality of this cable.

• Research Organization: GK Technologies, Inc., Edison, NY (USA)
• DOE Contract Number: AC01-76ET29311
• OSTI ID: 5240593
• Report Number(s): EPRI-EL-428-Vol.2; ON: DE82008309
• Country of Publication: United States
• Language: English

Related Subjects

200301* -- Power Transmission & Distribution-- AC Systems
EHV & UHV-- (-1989)
24 POWER TRANSMISSION AND DISTRIBUTION
AC SYSTEMS
AGING
BREAKDOWN
CABLES
CONDUCTOR DEVICES
DATA
DIELECTRIC MATERIALS
DIELECTRIC PROPERTIES
EHV AC SYSTEMS
ELECTRIC CABLES
ELECTRICAL EQUIPMENT
ELECTRICAL PROPERTIES
ENERGY SYSTEMS
EQUIPMENT
EXPERIMENTAL DATA
EXTRUSION
FABRICATION
HVAC SYSTEMS
INFORMATION
MATERIALS
MATERIALS WORKING
NUMERICAL DATA
ORGANIC COMPOUNDS
ORGANIC POLYMERS
PHYSICAL PROPERTIES
POLYETHYLENES
POLYMERS
POLYOLEFINS
POWER SYSTEMS
POWER TRANSMISSION
UNDERGROUND POWER TRANSMISSION