Insulator cover
First Claim
Patent Images
1. In an electrical power transmission system of the type having a support structure, a power line, and an insular having a first end secured to the support structure and a second end carrying the power line, the improvement comprising:
- an insulative cover having a first end secured to the insular adjacent the insulator'"'"'s first end and a second end secured to the insulator adjacent the insulator'"'"'s second end and enshrouding a central portion of the insulator, the first and second cover ends respectively sealed to the first and second insulator ends by at least one gasket.
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Accused Products
Abstract
An insulative cover is utilized to protect an insulator supporting an electrical power line relative to a support structure in an electrical power transmission system. A first end of the cover is secured to the insulator adjacent the insulator'"'"'s first end and a second end of the cover is secured to the insulator adjacent to the insulator'"'"'s second end. The cover defines a volume substantially enclosing a central portion of the insulator.
52 Citations
21 Claims
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1. In an electrical power transmission system of the type having a support structure, a power line, and an insular having a first end secured to the support structure and a second end carrying the power line, the improvement comprising:
an insulative cover having a first end secured to the insular adjacent the insulator'"'"'s first end and a second end secured to the insulator adjacent the insulator'"'"'s second end and enshrouding a central portion of the insulator, the first and second cover ends respectively sealed to the first and second insulator ends by at least one gasket. - View Dependent Claims (2, 3)
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4. In an electrical power transmission system of the type having a support structure, a power line, and an insulator having a first end secured to the support structure and a second end carrying the power line, the improvement comprising:
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an insulative cover having a first end secured to the insulator adjacent the insulator'"'"'s first end having a second end secured to the insulator adjacent the insulator'"'"'s second end and enshrouding a volume surrounding a central portion of the insulator and comprising;
a first piece and a second piece, each being the unitarily-formed combination of;
a body;
first and second vertical flanges extending along first and second sides of the body, respectively; and
first and second collar sections, formed as sectors of a sleeve, at first and second ends of the body. - View Dependent Claims (5, 6, 7, 8, 9, 10)
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11. An apparatus comprising:
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a power line in an electrical power transmission system;
an insulator having a first end secured to a support structure and a second end carrying the power line; and
an insulative cover having a first end secured to the insulator adjacent the insulator'"'"'s first end and a second end secured to the insulator adjacent the insulator'"'"'s second end and defining a volume substantially enclosing at least a central portion of the insulator and wherein gaskets seal the insulative cover to the insulator first and second ends and have adhesive on two surfaces. - View Dependent Claims (12, 13, 14, 15)
the support structure is a utility pole;
the insulator first end comprises a metal fitting bolted to the utility pole; and
the insulator second end comprises a metal fitting into which at least one eyebolt is threaded for supporting the power line.
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13. The apparatus of claim 11 wherein the insulator'"'"'s first end is an upper end and the insulator'"'"'s second end is a lower end.
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14. The apparatus of claim 11 wherein the power line carries an alternating current voltage in excess of one kV.
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15. The apparatus of claim 11 wherein a body portion of the cover comprises a material selected from the group consisting of VDF/HFP, PDVF, PTFE, FEP, ETFE, ECTFE, polypropylene, polyvinyl chloride, polyethylene (Type 1), polyethermide, and polyethersulfone and has a dielectric strength greater than 10 kV/mm, a volume resistance of 1013-1016 Ohm-cm, a surface resistance of 1015-1017 Ohm, a dielectric constant of 2.5-8, a dissipation factor of 10−
- 3-10−
1, a coefficient of linear thermal expansion of 10−
6-10−
4 in/in °
F. and a twenty-four hour water absorption of 0.01%-0.04%.
- 3-10−
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16. A combination device for supporting a power line relative to a support structure in an electrical power transmission system, comprising:
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an insulator having a first end secured to the support structure and a second end carrying the power line; and
an insulative cover having a first end secured to the insulator adjacent the insulator'"'"'s first end and a second end secured to the insulator adjacent the insulator'"'"'s second end and defining a sealed volume substantially enclosing at least a central portion of the insulator.
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17. A combination device for supporting a power line relative to a support structure in an electrical power transmission system, comprising:
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an insulator having a first end secured to the support structure and a second end carrying the power line, an insulative cover having a first end secured to the insulator adjacent the insulator'"'"'s first end and a second end secured to the insulator adjacent the insulator'"'"'s second end and defining a volume substantially enclosing at least a central portion of the insulator and including at least one vent hole no greater than one square millimeter in cross-section. - View Dependent Claims (18)
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19. A method for protecting an insulator in an electrical transmission system from environmental contaminants, said system having a support structure, a power line, and an insulator having a first end secured to the support structure and a second end carrying the power line, said method comprising:
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providing an insulative cover;
surrounding the insulator with the cover by;
placing a first cover half on a first side of a separation plane extending longitudinally through the insulator;
placing a second cover half on a second side of the separation plane; and
securing the first half end to the second half;
securing a first end of the cover to the insulator adjacent the insulator'"'"'s first end; and
securing a second end of the cover to the insulator adjacent the insulator'"'"'s second end so as to define a volume surrounding a central portion of the insulator and effective to protect such central portion from environmental contaminants. - View Dependent Claims (20)
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21. A combination device for supporting a power line relative to a support structure in an electrical power transmission system, comprising:
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an insulator having a first end secured to the support structure and a second end carrying the power line, an insulative cover formed in two halves vacuum-formed to accommodate sheds of the insulator and having a first end secured to the insulator adjacent the insulator'"'"'s first end and a second end secured to the insulator adjacent the insulator'"'"'s second end and defining a volume substantially enclosing at least a central portion of the insulator.
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Specification