US3260795A - Apparatus for suspending a conductor from an insulator - Google Patents

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Classifications

• • H—ELECTRICITY
  • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
  • H02G7/00—Overhead installations of electric lines or cables
  • H02G7/20—Spatial arrangements or dispositions of lines or cables on poles, posts or towers

Definitions

• This invention relates to suspension apparatus for conductors and more particularly to apparatus for supporting power transmission lines, such as bundled conductors.
• An object of my invention is to provide suspension apparatus for conductors in which a relatively wide, downwardly opening shell-like yoke body is provided having a convexly curved outer surface whereby corona and radio noise voltages are reduced greatly without employing auxiliary shielding or other gradient control devices.
• Another object of my invention is to provide apparatus for suspending a conductor from an insulator string whereby the electric stress distribution is such that the line voltage is divided between the insulators in a more uniform manner.
• a further object of my invention is to provide apparatus for suspending a conductor from an insulator in which improved mechanical strength properties as well as improved electrical properties are obtained.
• a still further object of my invention is to provide suspension apparatus -for conductors of the character designated which shall be simple of construction, economical of manufacture and which shall be adapted for supporting various types of bundle conductors and the like.
• FIG. 1 is a side elevational view of the suspension apparatus, partly broken away and in section;
• FIG. 2 is an end elevational view, partly broken away and in section;
• FIG. 3 is a graph showing radio influence voltages obtained with conventional type suspension apparatus and with my improved suspension apparatus.
• my improved suspension apparatus comprises a downwardly opening body I having a convexly curved outer surface 11. Suitable recesses 12 are provided in the downwardly opening body, as shown in FIG. 1, for receiving attachment fittings 13 for a string of suspension insulators indicated generally at 25. While I show two strings of suspension insulators in the drawings, it will be apparent that one such string of suspension insulators may be employed.
• each opening 12 Extending inwardly of the under surface of the downwardly opening body 10 adjacent opposite sides of each opening 12 are lugs 14 having aligned openings '16 therein which are disposed to register with a transverse opening 17 provided in one end of the insulator attachment fitting 13. Passing through the aligned openings 16 and 17 is a pin 1-8 which is held in position by suitable means, such as a cotter key 20.
• the downwardly opening body '10 is of a generally inverted U-shape, as viewed in cross section and the downwardly opening body extends transversely of and above the conductors 24.
• an inverted V-shaped recess 26 is provided in the under surface of the downwardly opening body 10, as shown in FIG. 1 to simplify live line maintenance procedures and reinforcing beads 27 are provided along the lower edges of the body, as shown, to add strength to the composite body member.
• FIG. 3 ofthe drawing I show the point at which corona extinction occurs where conventional flat type yoke members are employed and where my improved yoke member is employed. That is, with conventional flat type yoke members, corona extinction occurs at applied voltages below approximately 295 kilovolts, as shown at X in FIG. 3. With my improved yoke member, on the other hand, corona is extinct up to an applied voltage of approximately 445 kilovolts, as indicated at Y in FIG. 3.
• the curve 28 shows the radio influence voltages obtained with conventional type yoke members whereas the curve 29 shows the radio influence voltages obtained where my improved yoke member is employed. It will thus be seen that the assembly is protected against corona and radio influence voltages are decreased at relatively high line-to-ground voltages.
• the yoke member has improved mechanical sterngth properties and rigidity as well as improved electrical properties.
• apparatus for suspending a conductor from an insulator attachment fitting comprising:

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Description

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Family

ID=23685650

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Cited By (2)

Citations (2)

• 1965
  • 1965-01-13 US US425216A patent/US3260795A/en not_active Expired - Lifetime

Patent Citations (2)

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