# US 2018/0025809 A1 · Electrical accessories for power transmission systems and methods for preparing such electrical accessories > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2018/0025809 A1 - Document ID: US20180025809A1 - Status: Published application - Kind: A1 - Application number: 15/216,632 - Filed: 2016-07-21 - Published: 2018-01-25 - Earliest claimed: 2016-07-21 - Applicants: General Cable Technologies Corporation - Inventors: Sathish Kumar Ranganathan; Vijay Mhetar; Srinivas Siripurapu; Cody R. Davis; Michael Christopher Wright - Web page: https://patentgrep.com/patent/US20180025809A1 ## CPC - H01B 3/02: mainly consisting of inorganic substances - H01B 5/002: {Auxiliary arrangements} - H01B: CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES (selection for magnetic properties H01F1/00; waveguides H01P {; printed circuits H05K}) ## Abstract A coated electrical accessory includes a bare electrical accessory and a substantially inorganic and dried coating layer coating the bare electrical accessory. The coating layer includes a heat radiating agent and a binder. When the coated electrical accessory is tested in accordance with ANSI C119.4-2004 with an amount of imparted current, the coated electrical accessory exhibits an operating temperature that is less than an operating temperature of a bare electrical accessory tested in accordance with ANSI C119.4-2004 with the same amount of imparted current. Methods are also provided. ## Claims ### Claim 1 A coated electrical accessory energizable to facilitate distribution of power, the coated electrical accessory comprising: a bare electrical accessory, and a substantially inorganic and dried coating layer coating the bare electrical accessory, said coating layer comprising a binder and a heat radiating agent, the binder comprising from about 20% to about 60%, by dry weight, of the coating layer, and the binder comprising a metal silicate selected from the group consisting of sodium silicate, potassium silicate, lithium silicate, or combinations thereof; and wherein when tested in accordance with ANSI C119.4-2004, the operating temperature of the coated electrical accessory is lower than the operating temperature of the bare electrical accessory when the same current is applied. ### Claim 2 (depends on 1) The coated electrical accessory of claim 1, wherein the operating temperature of the coated electrical accessory is reduced by about 5° C. or more when compared to the operating temperature of the bare electrical accessory. ### Claim 3 (depends on 1) The coated electrical accessory of claim 1 conducts higher amperage than the bare electrical accessory when operated at the same voltage. ### Claim 4 (depends on 1) The coated electrical accessory of claim 1 passes the Mandrel Bend Test after heat aging at 325° C. for 1 day. ### Claim 5 (depends on 1) The coated electrical accessory of claim 1 passes the Mandrel Bend Test after heat aging at 325° C. for 7 days. ### Claim 6 (depends on 1) The coated electrical accessory of claim 1, wherein said coating layer comprises less than 5%, by weight, of organic material. ### Claim 7 (depends on 1) The coated electrical accessory of claim 1, wherein the coating composition has a L* value of about 30 to about 95. ### Claim 8 (depends on 1) The coated electrical accessory of claim 1, wherein said coating layer has a heat emissivity coefficient of about 0.75 or greater. ### Claim 9 (depends on 1) The coated electrical accessory of claim 1, wherein said coating layer exhibits a solar absorptivity coefficient of about 0.4 or greater. ### Claim 10 (depends on 1) The coated electrical accessory of claim 1, wherein said coating layer has a coefficient of thermal expansion of about 10×10−6/° C. to about 100×10−6/° C. when measured over a temperature range of 0° C. to 250° C. ### Claim 11 (depends on 1) The coated electrical accessory of claim 1, wherein said coating layer, when applied to the bare electrical accessory, comprises a thickness from about 5 microns to about 30 microns. ### Claim 12 (depends on 1) The coated electrical accessory of claim 1, wherein the heat radiating agent comprises a metal oxide. ### Claim 13 (depends on 1) The coated electrical accessory of claim 1, wherein the heat radiating agent comprises from about 1% to about 30%, by dry weight, of said coating layer. ### Claim 14 (depends on 1) The coated electrical accessory of claim 1, wherein said coating layer further comprises one or more of fillers, stabilizers, colorants, surfactants and infrared reflective additives. ### Claim 15 (depends on 1) The coated electrical accessory of claim 1, wherein said coating layer is formed from a water-based coating composition. ### Claim 16 (depends on 1) The coated electrical accessory of claim 1, wherein the bare electrical accessory is aged due to use prior to being coated with said coating layer. ### Claim 17 (depends on 1) The coated electrical accessory of claim 1 comprises one or more of a transmission bus, a termination component, a joints component, a suspension and support component, a motion control component, a guying component, a wildlife protection and deterrent component, a conductor and compression fitting repair component, a substation component, a clamping component, and a corona ring component. ### Claim 18 A coated electrical accessory energizable to facilitate distribution of power, the coated electrical accessory comprising: a bare electrical accessory, and a substantially inorganic and dried coating layer coating the bare electrical accessory, said coating layer exhibiting a solar absorptivity coefficient of about 0.4 or greater and comprising a binder and a heat radiating agent, the binder comprising from about 15% to about 65%, by dry weight, of the coating layer, and the binder comprising a metal silicate selected from the group consisting of sodium silicate, potassium silicate, lithium silicate, or combinations thereof; and wherein when tested in accordance with ANSI C119.4-2004, the operating temperature of the coated electrical accessory is lower than the operating temperature of the bare electrical accessory when the same current is applied. ### Claim 19 A coated electrical accessory energizable to facilitate distribution of power, the coated electrical accessory comprising: a bare electrical accessory, and a substantially inorganic and dried coating layer coating the bare electrical accessory, said coating layer comprising a binder and a heat radiating agent, the binder comprising from about 15% to about 65%, by dry weight, of the coating layer, and the binder comprising a metal silicate selected from the group consisting of sodium silicate, potassium silicate, lithium silicate, or combinations thereof; and wherein when tested in accordance with ANSI C119.4-2004, the operating temperature of the coated electrical accessory is reduced by 5° C. or more when compared to the operating temperature of the bare electrical accessory when the same current is applied, and wherein the coated electrical accessory passes the Mandrel Bend Test after heat aging at 325° C. for 1 day.