Wildlife flashover preventer for high voltage electrical transmission structures
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United States of America Patent
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Jun 17, 2014
Grant Date -
Nov 8, 2012
app pub date -
Jul 20, 2012
filing date -
Feb 27, 2009
priority date (Note) -
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Abstract
A conventional grounded steel tower, or other structure, supports multiple wires (e.g., 6) carrying multi-phase high voltage electricity (e.g., >100 kV). Each wire is supported by a ceramic insulator connected to a horizontal arm of the structure, where an angled strut helps support the arm. There are usually three tiers of wires. The closest distance between a wire and ground is typically between the wire and an angled strut below the wire, where the angled strut helps support a lower-tier wire. A guard formed of a dielectric is affixed to and covers the lower portion of the steel strut as well as any steel that outward extends beyond the strut. The guard prevents flashover between a wire and the underlying grounded strut if a large bird perches on the guard, since the bird will not be grounded by the strut.
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