Development of extruded and molded straight joint for ultra high-voltage XLPE cable
In Japan, 154-kV crosslinked polyethylene-insulated cables (XLPE) are already in use for long-distance tranmission lines, but 275-kV XLPE cables are used only for short-distance lines (without joints) on the premises of power-generation plants and substations. 275-kV XLPE cable is expected to be used for long-distance transmission lines in the near future because of its overall cost advantage. To respond to this need, a straight-through joint with the same reliability as the cable should be developed. Reliable joints should be formed and molded with the same curable PE compounds as the cable insulation. At present, 154-kV XLPE cables for long-distance transmission lines are usually constructed with the joint comprising XLPE insulation wrapped with curable PE tape and molded by heating. However, this taped molded joint has the disadvantages of troublesome tape handling. On the other hand, extruded molded joints are constructed by injecting curable melted PE into a mold with an extruder, eliminating contamination. The report describes the characteristics of the extruded and molded joint developed for 154, 275 and 500 kV class XLPE cables.
- Research Organization:
- Mitsubishi Cable Industries Ltd., Tokyo (Japan)
- OSTI ID:
- 6744775
- Report Number(s):
- PB-87-130902/XAB
- Resource Relation:
- Other Information: Included in Mitsubishi Cable Industries Review, No. 72, 10-15(Aug 1986)
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ELECTRIC CABLES
FABRICATION
MANUFACTURERS
HVAC SYSTEMS
ELECTRICAL INSULATION
POLYETHYLENES
POWER TRANSMISSION LINES
AC SYSTEMS
CABLES
CONDUCTOR DEVICES
ELECTRICAL EQUIPMENT
ENERGY SYSTEMS
EQUIPMENT
ORGANIC COMPOUNDS
ORGANIC POLYMERS
POLYMERS
POLYOLEFINS
POWER SYSTEMS
200301* - Power Transmission & Distribution- AC Systems
EHV & UHV- (-1989)