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Coated overhead conductor

a technology of overhead conductors and coatings, which is applied in the direction of insulated conductors, inorganic insulators, cables, etc., can solve the problems of limited line capacity, more electrical losses in the conductor, damage to the conductor or the accessories of the line, etc., and achieve the effect of reducing the operating temperature of the conductor

Inactive Publication Date: 2015-04-16
GENERAL CABLE TECH CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention provides an overhead conductor that has a reduced operating temperature compared to a conductor without an emissivity agent. The emissivity agent can be directly incorporated into the conductor or coated on it. The conductor's surface is coated with a layer consisting of a high emissivity coating that contains an inorganic adhesive, a filler, and optionally, a stabilizer. The coating provides superior adhesion and flexibility on the conductor and can resist peeling and cracking during repeated bending of the cable. The method involves coating the conductor with the inorganic, flexible coating that increases its heat transfer capabilities.

Problems solved by technology

The ampacity of a line is limited by the maximum safe operating temperature of the bare conductor that carries the current.
Exceeding this temperature can result in damage to the conductor or the accessories of the line.
Higher current and temperature leads to higher electrical resistance, which, in turn, leads to more electrical losses in the conductor.
Both FR 2971617 and WO 2007 / 034248 require white coatings that are not desirable due to glare and discoloration over time.
Both DE 3824608 and FR 2971617 require polymeric coatings that are not desirable due to their questionable heat and wet aging characteristics.

Method used

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Examples

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example

[0062]Eleven (11) coating compositions (Exp 1, Exp 2, Exp3, Exp4, Exp 5, Exp 6, Exp 7, Exp 8, Exp 9, Exp 10, and Exp 11) were made. Exp 1 contains dry admixture of 13-15% sodium silicate, 68-69% silicon dioxide powder, 14-16% boron carbide, and 1-1.5% bentonite powder.

[0063]Exp 2 contains 13-15% sodium silicate, 68-69% silicon dioxide powder, 13-15% boron carbide, 1-2% boron nitride, and 1-1.5% bentonite powder.

[0064]Exp 3-7 contains B4C dry powder weight 12-17%, SiO2 dry powder weight 60-70%, Poly-silicate powder dry weight basis 15-20%, DI water on a wet weight basis of 20-25%. The total solids content is approximately 50%.

[0065]Exp 8-11 are consists of B4C dry powder weight of 10-15%, TiO2 powder dry weight of 7-13%, diatomaceous earth powder dry weight of 1-5%, acrylic polymer dry weight 30-40% and DI water on a wet weight basis of 30-50%. The total solids content is approximately 50%.

[0066]The above mentioned compositions are coated on sample substrates and cured. The final thi...

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Abstract

The present invention relates to a surface modified overhead conductor with a coating that allows the conductor to operate at lower temperatures. The coating contains about 5% to about 30% of an inorganic adhesive, about 45% to about 92% of a filler, about 2% to about 20% of one or more emissivity agents, and about 1% to about 5% of a stabilizer.

Description

FIELD OF THE INVENTION[0001]The present invention relates to a surface modified overhead conductor with a coating that allows the conductor to operate at lower temperatures.BACKGROUND OF THE INVENTION[0002]As the need for electricity continues to grow, the need for higher capacity transmission and distribution lines grows as well. The amount of power a transmission line can deliver is dependent on the current-carrying capacity (ampacity) of the line. The ampacity of a line is limited by the maximum safe operating temperature of the bare conductor that carries the current. Exceeding this temperature can result in damage to the conductor or the accessories of the line. Moreover, the conductor gets heated by Ohmic losses and solar heat and it gets cooled by conduction, convection and radiation. The amount of heat generated due to Ohmic losses depends on current (I) passing through it and its electrical resistance (R) by the relationship Ohmic losses=I2R. Electrical resistance (R) itsel...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): H01B7/29H01B3/10
CPCH01B7/29H01B7/292H01B3/10H01B1/023H01B1/026H01B3/002Y10T428/2916Y10T428/292Y10T428/294Y10T428/2958B24C1/00B05D1/30B05D3/002B05D1/02B05D3/08B05D1/08B05D3/12B05D5/12B05D7/20H01B13/165H02G7/00
Inventor MHETAR, VIJAYDAVIS, CODY R.RANGANATHAN, SATHISH KUMAROLVER, JOHNDILLARD, JOHN
Owner GENERAL CABLE TECH CORP
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