EP0136039A2 - Dispositifs de mise à la terre - Google Patents

Dispositifs de mise à la terre Download PDF

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Publication number
EP0136039A2
EP0136039A2 EP84305590A EP84305590A EP0136039A2 EP 0136039 A2 EP0136039 A2 EP 0136039A2 EP 84305590 A EP84305590 A EP 84305590A EP 84305590 A EP84305590 A EP 84305590A EP 0136039 A2 EP0136039 A2 EP 0136039A2
Authority
EP
European Patent Office
Prior art keywords
ground
electrically conductive
grounding
polymer
pin
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP84305590A
Other languages
German (de)
English (en)
Inventor
Dennis Carl Siden
Thomas Dean Ratzlaff
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Raychem Corp
Original Assignee
Raychem Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Raychem Corp filed Critical Raychem Corp
Publication of EP0136039A2 publication Critical patent/EP0136039A2/fr
Withdrawn legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • H01R4/58—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation characterised by the form or material of the contacting members
    • H01R4/66—Connections with the terrestrial mass, e.g. earth plate, earth pin

Definitions

  • ground pins and other grounding devices have been extensively used.
  • the grounding device is buried in, or driven into the ground adjacent or under the building, and the electrical system is connected thereto. Because the grounding device is exposed to moisture and other electrolytes in the ground, it is liable to corrosion, and for this reason, is preferably made of copper rather than steel or aluminum, which are substantially cheaper than copper but which are much more'rapidly corroded by moist soil.
  • the grounding device used in the invention is often a ground pin which is driven into the ground.
  • an open mesh mat which is buried beneath the building containing the electrical system.
  • the invention provides an electrical system which is grounded through a grounding device buried in the ground, the device comprising
  • the first member of the grounding device is composed of a metal, e.g. steel or aluminum.
  • the first member has an upper bearing surface against which force can be applied to drive the ground pin into the soil and is sufficiently strong for this purpose.
  • the metal for a ground pin is preferably steel, which is both cheap and strong, and the first member is typically a steel rod of diameter 0.2 to 1 inch (0.5 to 2.5 cm), preferably 0.25 to 0.5 inch (0.6 to 1.25 cm).
  • the second member is composed of a conductive polymer, and electrically surrounds and is in electrical contact with the first member, preferably so that little, if any, of the first member is exposed to corrosive action from the soil in which the grounding device is buried.
  • the second member is in the form of a coating of thickness at least 0.1 inch (0.25 cm), preferably 0.2 to 0.5 inch (0.5 to 1.25 cm), around the first member.
  • Contact between the first member and the soil can be prevented by means of one or more other members (e.g. of an insulating polymeric composition or of a metal which is less rapidly corroded than the first member) in addition to the second member.
  • the conductive filler in the conductive polymer is preferably one which is resistant to corrosion, and for this reason preferably consists essentially of carbonaceous material such as carbon or graphite or both, e.g. carbon black, carbon fibers, graphite flake or graphite fibers. Acetylene black is a preferred conductive filler. Especially when the filler is fibrous, it can also serve as a reinforcing agent.
  • the conductive polymer can contain conventional additives for polymeric compositions, e.g. antioxidants, flame retardants, and non-conductive fillers. The amount of the conductive filler should be sufficient to ensure that the grounding pin will perform its grounding function.
  • the resistivity of the conductive polymer at 25°C is preferably 10 to 10- 2 ohm.cm, particularly 5 to 0.1 ohm.cm. If the amount of filler is insufficient, the second member has too high a resistance, but if the amount is too high, the resistance of the second member to physical abuse is too low and the composition is difficult to shape.
  • the conductive polymer increases in resistivity when it is heated by passage of a grounding current therethrough, since this tends to equalize the current density over the surface of the grounding device when a grounding current is passed through it. A large increase in resistivity is not necessary.
  • the resistivity increases by a factor of at least 2 between 25°C and 75°C.
  • the polymer in the conductive polymer can be a single polymer or a blend of polymers.
  • a factor which needs to be considered in choosing the polymer is the physical abuse to which the second member will be subjected, e.g. when a ground pin is driven into the soil. As explained below, measures can be taken to reduce or eliminate frictional forces on the second member as a ground pin is driven into the soil, but if such measures are not taken, the polymer should be one having sufficient strength to allow the ground pin to be driven into the soil without substantial damage to the second member, e.g. a polyarylene polymer.
  • the ground pin has a pointed lower end portion which (i) is composed of an insulating material, e.g. a hard polymer, or (ii) is composed of a conductive material and is separated from the first member by the second member or by an insulating member.
  • the lower portion can be enlarged so that, when the ground pin is driven into the soil, the lower portion makes a hole sufficiently large to prevent substant.ial frictional forces from acting on the second member.
  • the lower end portion is part of a third member which
  • Figures 1 and 2 are vertical cross-sections through ground pins for use in the invention comprising a first metal member 1 having an upper bearing surface 11, and a second conductive polymer member 2 surrounding the first member.
  • the first member has a pointed and enlarged lower portion 12 which is composed of a hard insulating polymer and which protects the conductive polymer when the ground pin is driven into the soil.
  • the ground pin includes a third member 3 which is made of metal and which surrounds the conductive polymer member.
  • a clamp 4 is shown for securing a ground wire to the first member.

Landscapes

  • Elimination Of Static Electricity (AREA)
  • Discharging, Photosensitive Material Shape In Electrophotography (AREA)
EP84305590A 1983-08-19 1984-08-17 Dispositifs de mise à la terre Withdrawn EP0136039A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US52495883A 1983-08-19 1983-08-19
US524958 1983-08-19

Publications (1)

Publication Number Publication Date
EP0136039A2 true EP0136039A2 (fr) 1985-04-03

Family

ID=24091341

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84305590A Withdrawn EP0136039A2 (fr) 1983-08-19 1984-08-17 Dispositifs de mise à la terre

Country Status (2)

Country Link
EP (1) EP0136039A2 (fr)
JP (1) JPS6062070A (fr)

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0415950A1 (fr) * 1988-04-14 1991-03-13 Pro-Start, Inc. Borne de batterie anti-corrosive
FR2871953A1 (fr) * 2004-06-21 2005-12-23 Sankosha Co Ltd Conducteur de mise a la masse
CN102420358A (zh) * 2011-11-14 2012-04-18 江苏金合益复合新材料有限公司 具有纳米材料防腐导电层的接地体及其制作方法
CN105514629A (zh) * 2016-01-28 2016-04-20 国家电网公司 一种复合接地极
CN105655738A (zh) * 2016-03-14 2016-06-08 云南宇恬防雷材料有限公司 一种性能稳定的防雷接地模块
CN106356651A (zh) * 2016-10-12 2017-01-25 国网江苏省电力公司盱眙县供电公司 预埋式接地桩
CN106785509A (zh) * 2016-12-23 2017-05-31 国网山东省电力公司临沂供电公司 多功能接地装置及其制备方法
US10181362B2 (en) 2014-11-07 2019-01-15 Nkt Cables Group A/S Grounding conductor, electrical power system and use of grounding conductor
EP3428932A1 (fr) * 2017-07-10 2019-01-16 NKT Cables Group A/S Câble d'énergie électrique
CN109616786A (zh) * 2018-12-14 2019-04-12 国网山东省电力公司济南供电公司 一种输电线路浪涌导流接地装置
CN110854557A (zh) * 2019-11-08 2020-02-28 河南四达电力设备股份有限公司 一种组合式成套接地设备以及接地施工方法
CN112079637A (zh) * 2020-09-10 2020-12-15 大连法伏安电器有限公司 一种复合接地模块及其制备方法
CN112688091A (zh) * 2020-12-24 2021-04-20 国网山东省电力公司烟台市牟平区供电公司 10千伏架空线路检修智能临时接地装置
CN117673780A (zh) * 2024-02-01 2024-03-08 任丘市召明电力设备有限公司 一种变压器接地极及其埋设设备

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2717207B2 (ja) * 1988-03-22 1998-02-18 日本電信電話株式会社 接地電極
JP2886779B2 (ja) * 1994-02-25 1999-04-26 昌一金属株式会社 避雷器用接地棒
JP2008081169A (ja) * 2006-09-28 2008-04-10 Shinko Chemical Co Ltd プラスチック製の容器

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0415950A1 (fr) * 1988-04-14 1991-03-13 Pro-Start, Inc. Borne de batterie anti-corrosive
EP0415950A4 (en) * 1988-04-14 1993-06-30 Charles A. Sykes Anti-corrosive battery terminal
FR2871953A1 (fr) * 2004-06-21 2005-12-23 Sankosha Co Ltd Conducteur de mise a la masse
CN1713454B (zh) * 2004-06-21 2010-10-13 株式会社山光社 接地导体
CN102420358A (zh) * 2011-11-14 2012-04-18 江苏金合益复合新材料有限公司 具有纳米材料防腐导电层的接地体及其制作方法
US10181362B2 (en) 2014-11-07 2019-01-15 Nkt Cables Group A/S Grounding conductor, electrical power system and use of grounding conductor
CN105514629A (zh) * 2016-01-28 2016-04-20 国家电网公司 一种复合接地极
CN105514629B (zh) * 2016-01-28 2017-10-13 国家电网公司 一种复合接地极
CN105655738A (zh) * 2016-03-14 2016-06-08 云南宇恬防雷材料有限公司 一种性能稳定的防雷接地模块
CN106356651A (zh) * 2016-10-12 2017-01-25 国网江苏省电力公司盱眙县供电公司 预埋式接地桩
CN106785509B (zh) * 2016-12-23 2018-10-02 国网山东省电力公司临沂供电公司 多功能接地装置及其制备方法
CN106785509A (zh) * 2016-12-23 2017-05-31 国网山东省电力公司临沂供电公司 多功能接地装置及其制备方法
EP3428932A1 (fr) * 2017-07-10 2019-01-16 NKT Cables Group A/S Câble d'énergie électrique
CN109616786A (zh) * 2018-12-14 2019-04-12 国网山东省电力公司济南供电公司 一种输电线路浪涌导流接地装置
CN110854557A (zh) * 2019-11-08 2020-02-28 河南四达电力设备股份有限公司 一种组合式成套接地设备以及接地施工方法
CN112079637A (zh) * 2020-09-10 2020-12-15 大连法伏安电器有限公司 一种复合接地模块及其制备方法
CN112079637B (zh) * 2020-09-10 2022-06-07 大连法伏安电器有限公司 一种复合接地模块及其制备方法
CN112688091A (zh) * 2020-12-24 2021-04-20 国网山东省电力公司烟台市牟平区供电公司 10千伏架空线路检修智能临时接地装置
CN117673780A (zh) * 2024-02-01 2024-03-08 任丘市召明电力设备有限公司 一种变压器接地极及其埋设设备
CN117673780B (zh) * 2024-02-01 2024-04-30 任丘市召明电力设备有限公司 一种变压器接地极及其埋设设备

Also Published As

Publication number Publication date
JPS6062070A (ja) 1985-04-10

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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17P Request for examination filed

Effective date: 19840901

AK Designated contracting states

Designated state(s): AT BE CH DE FR GB IT LI NL SE

STAA Information on the status of an ep patent application or granted ep patent

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18D Application deemed to be withdrawn

Effective date: 19870302

RIN1 Information on inventor provided before grant (corrected)

Inventor name: SIDEN, DENNIS CARL

Inventor name: RATZLAFF, THOMAS DEAN