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Title:
耐雷架空地線
Document Type and Number:
Japanese Patent JP4175542
Kind Code:
B2
Abstract:

To provide a lightning resistance overhead ground wire in which improvement of lightning impulse resistance performance can be realized easily.

Zinc containing grease 10 mixing zinc powder in grease 8 is filled into the inner clearance of a stranded wire 5 of the overhead ground wire 21 of, for example, an optical fiber compound type, or is coated on the circumferences. In the lightning stroke, electric wire protective effect of zinc to absorb lightning energy as evaporation heat because zinc powder in the zinc containing grease evaporates, is shown, and lightning impulse resistance ability of the overhead ground wire is improved. When a conductive grease is used as the grease, lightning impulse resistance is improved further. There is hardly weight increase by countermeasures such as increase of electric wire size. This is inexpensive in comparison with a method to coat zinc thickly on the individual element wire, and manufacturing is easy.

COPYRIGHT: (C)2004,JPO


Inventors:
Yuji Asano
Application Number:
JP2003120758A
Publication Date:
November 05, 2008
Filing Date:
April 24, 2003
Export Citation:
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Assignee:
Fujikura Ltd.
International Classes:
G02B6/44; H01B5/08; H01B11/22
Domestic Patent References:
JP11306876A
JP10144151A
JP1157006A
JP58206006A
Attorney, Agent or Firm:
Yasuhiko Kagawa