# US 8,785,768 B2 · Method for vertically grounding and leading down from outer side of composite material pole tower and pole tower thereof

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- Number: US 8,785,768 B2
- Document ID: US8785768B2
- Status: Granted
- Kind: B2
- Application number: 13/395,103
- Filed: 2010-05-05
- Published: 2012-07-05
- Granted: 2014-07-22
- Earliest claimed: 2009-09-08
- Assignees: Shenzhen Power Supply Burea of Guangdong Power Grid Corp.; State Grid Electric Power Research Institute
- Applicants: Hanming Li; Zhijun Li; Qianhu Wei; Ting Liu; Shicong Deng; Feng Huo; Ming Zhan; Min Dai; Weicai Zhou; Kai Liu; Yuhua Zhang; Xiong Wu; Ning Cao; Dingxie Gu; Peihong Zhou; Huiwen He; Ying Lou; Zhenqiang Li
- Inventors: Hanming Li; Zhijun Li; Qianhu Wei; Ting Liu; Shicong Deng; Feng Huo; Ming Zhan; Min Dai; Weicai Zhou; Kai Liu; Yuhua Zhang; Xiong Wu; Ning Cao; Dingxie Gu; Peihong Zhou; Huiwen He; Ying Lou; Zhenqiang Li
- Web page: https://patentgrep.com/patent/US8785768B2

## CPC

- H02G 7/20: Spatial arrangements or dispositions of lines or cables on poles, posts or towers
- H01R 4/66: Connections with the terrestrial mass, e.g. earth plate, earth pin
- H02G 1/02: for overhead lines or cables
- H02G 13/00: Installations of lightning conductors; Fastening thereof to supporting structure
- H02G: INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H01R: ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS

## Abstract

A method for vertically grounding and leading down form an outer side of a composite pole tower and pole tower thereof, wherein the method includes the following steps: extending an upper metal cross arm from an extended line of at least one side of a ground wire cross arm, vertically leading down a ground down-leading wire from a distal end of the upper metal cross arm, connecting the ground down-leading wire to the pole tower via a lower metal cross arm at a distance under a lower lead, and grounding the ground down-leading wire along a tower body of the pole tower, wherein when an lower portion of the tower body is a metal pipe, the ground down-leading wire is selectively directly connected to the metal pipe via the lower metal cross arm. The method facilitates in compressing the width of the transmission corridor to a maximum extent as well as designing a lightning protection, preventing the ground down-leading wire from short-circuiting with the tower body, and realizing the insulation function of the composite material tower body. The manner of using unilateral ground down-leading wire saves material, and is economical and simple in structure.

## Claims

### Claim 1

A method for vertically grounding and leading down form an outer side of a composite pole tower, wherein said method comprises the following steps:
extending an upper metal cross arm from an extended line of at least one side of a ground wire cross arm,
vertically leading down a ground down-leading wire from a distal end of said upper metal cross arm,
connecting said ground down-leading wire to said pole tower via a lower metal cross arm at a distance under a lower lead, and
grounding said ground down-leading wire along a tower body of said pole tower, wherein when an lower portion of said tower body is a metal pipe, said ground down-leading wire is selectively directly connected to said metal pipe via said lower metal cross arm, wherein said ground down-leading wires and said tower body are supported therebetween by at least an insulating arm or a composite insulator, so that said ground down-leading wires are not easy to bend nor deform when suffering impact from wind during operation.

### Claim 2

A composite pole tower which grounds from an outer side thereof, comprising:
a tower body,
a ground wire cross arm,
an upper metal cross arm extended from an extended line of at least one side of said ground wire cross arm, a ground down-leading wire vertically extended from a distal end of said upper metal cross arm,
a lower metal cross arm, wherein said ground down-leading wire is connected to said pole tower via said lower metal cross arm at a distance under a lower current lead of said pole tower, wherein said ground down-leading wire is grounded along said tower body of said pole tower, wherein when an lower portion of said tower body is a metal pipe, said ground down-leading wire is selectively directly connected to said metal pipe via said lower metal cross arm, and
at least an insulating arm or a composite insulator support between said ground down-leading wires and said tower body.