Electricity: conductors and insulators – Conduits – cables or conductors – Insulated
Reexamination Certificate
2005-08-02
2005-08-02
Nguyen, Chau N. (Department: 2831)
Electricity: conductors and insulators
Conduits, cables or conductors
Insulated
Reexamination Certificate
active
06924435
ABSTRACT:
A high-voltage direct current cable insulation is made from a blend which includes an ethylene copolymer, such as ethylene-alpha olefin copolymer, with low crystallinity to reduce physical space charge trapping sites, a polar polymer modifier in an effective amount to enhance local conductivity to leak space charge quickly when local stress is enhanced, and an ion scavenger to stabilize or neutralize the space charge to provide a composition which is an effective high-voltage DC cable insulation. A high-voltage direct current cable semiconductive shield is made from a blend that includes an ethylene copolymer, a carbon black having a low level of ionic species, a polar polymer modifier, and an ion scavenger.
REFERENCES:
patent: 5237014 (1993-08-01), Barnabeo
patent: 6106742 (2000-08-01), Argyropoulos et al.
patent: 6670554 (2003-12-01), Jow et al.
patent: 7065633 (1995-03-01), None
patent: 9231839 (1997-09-01), None
patent: 99/20685 (1999-04-01), None
patent: 99/23145 (1999-05-01), None
patent: 99/33066 (1999-07-01), None
patent: 99/33067 (1999-07-01), None
patent: 99/33068 (1999-07-01), None
patent: 99/33069 (1999-07-01), None
patent: 99/40589 (1999-08-01), None
patent: 99/44206 (1999-09-01), None
patent: 99/44207 (1999-09-01), None
J. Tanaka, “Interfacial Aging Phenomena In Power Cable Insulation systems”, Institute of Materials Science, University of Connecticut, Progress Report No. 8 and 9, Sep. 13, 1988.
Y. Li, M. Yasuda, and T. Takad, “Pulsed Electro-acoustic Method for Measurement of Charge Accumulation in Solid Dielectrics,” IEEE Transactions on Dielectrics and Electrical Insulation, vol. 1, pp. 188-195, 1994.
M. Salah Khalil, “International Research and Development Trends and Problems of HVDC Cables with Polymeric Insulation,” IEEE Electrical Insulation Magazine. vol. 13, No. 6, pp. 39-41, Nov./Dec. 1997.
G.C. Montanari and D. Fabiani, “Evaluation of dc Insulation Performance Base on Space-Charge Measurments and Accelerated Life Tests,” IEEE Transactions on Dielectrics and Electrical Insulation, vol. 7, No. 3, Jun. 2000.
M. Abou-Dakka, A. Bulinski, and S. Barmji, “Space Charge Development in XLPE Insulation with and without Tree Retardant Subjected to DC Field,” 2000 Conference on Electrical Insulation and Dielectric Phenomena.
Jow Jinder
Mendelsohn Alfred
Nguyen Chau N.
Union Carbide Chemicals & Plastics Technology
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