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EP1271696A1 - Klemme - Google Patents

Klemme Download PDF

Info

Publication number
EP1271696A1
EP1271696A1 EP01305627A EP01305627A EP1271696A1 EP 1271696 A1 EP1271696 A1 EP 1271696A1 EP 01305627 A EP01305627 A EP 01305627A EP 01305627 A EP01305627 A EP 01305627A EP 1271696 A1 EP1271696 A1 EP 1271696A1
Authority
EP
European Patent Office
Prior art keywords
earth
assembly according
clamp assembly
body portion
earth clamp
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Withdrawn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
EP01305627A
Other languages
English (en)
French (fr)
Inventor
John c/o W.J.Furse & Company Limited Bilbie
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.)
ABB Installation Products International LLC
Original Assignee
Thomas and Betts International LLC
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 Thomas and Betts International LLC filed Critical Thomas and Betts International LLC
Priority to EP01305627A priority Critical patent/EP1271696A1/de
Publication of EP1271696A1 publication Critical patent/EP1271696A1/de
Withdrawn legal-status Critical Current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
    • H01R4/28—Clamped connections, spring connections
    • H01R4/30—Clamped connections, spring connections utilising a screw or nut clamping member
    • H01R4/36—Conductive members located under tip of screw

Definitions

  • the present invention relates to clamp arrangements, especially but not exclusively earth clamps.
  • Lightning conductors from electrical installations or lightning protection are fixed to earth rods by means of clamps.
  • the conductors may consist of a copper strip or tape or copper cable.
  • the clamp is a casting defining an aperture through which the earth rod and the cable or tape run.
  • a bolt or screw engages with a threaded aperture in the casting to act upon the conductor and the earth rod, urging them together to ensure good contact. Castings are relatively expensive, and labour intensive to produce.
  • an earth clamp assembly for clamping an earth rod to a conductor, the assembly comprising a clamp member for receiving the earth rod and the conductor, the clamp member including holding means for holding a first threaded member, a second threaded member engageable with the first threaded member, the second threaded member operable upon the earth rod and conductor to clamp the earth rod and the conductor to the clamp member in electrical contact with each other.
  • the first threaded member is a nut.
  • the nut may be removably held by the holding means.
  • the holding means substantially limits rotation of the nut when the nut is held thereby.
  • the clamp member includes first and second opposite end portions and an intermediate body portion therebetween.
  • the holding means may include holding portions arranged between each end portion and the intermediate body portion.
  • the holding portions include opposed substantially parallel, spaced-apart faces, and the nut may be securely held between the faces.
  • each end portion overlaps each other to provide the holding means.
  • each end portion includes an aperture, such that the apertures are substantially aligned with each other when the end portions are overlapped.
  • the second threaded member is located through the apertures to engage the first threaded member.
  • the second threaded member may be a bolt.
  • the body portion is shaped to fit closely around the conductor and earth rod, and may include a shoulder portion to reduce the spaced apart dimension of the body portion to that of the holding portions.
  • the body portion includes reinforcing means.
  • the reinforcing means may include an elongate formation extending the length of the body portion.
  • the formation may define a recess on the inside of the body portion and a corresponding raised region on the outside of the body portion.
  • the recess has a radius which is approximately the same as the thickness of the material of the body portion.
  • the reinforcing means extends substantially the whole length of the body portion.
  • Fig. 1 shows an earth clamp 10 formed from a strip of metal e.g. stainless steel.
  • the strip includes two opposite end portions 12, 16, holding portions 24, 25 and an intermediate body portion 20.
  • the end portions 12, 16 each define an aperture 14, 18 respectively.
  • the intermediate body portion 20 is shaped as shown in Fig. 1 to have a substantially U-shape, and the end portions 12, 16 overlap each other such that the apertures 14, 18 are aligned.
  • the holding portions 24, 25 as shown in Fig. 1 are substantially mutually parallel and spaced apart from each other and are each arranged between the respective end portions 16, 18 and the intermediate body portion 20.
  • the holding portions 24,25 each include an inwardly directed face 27,29, and the distance between the said faces of the holding portions 27,29 is such as to accommodate a nut 30 without allowing rotation of the same.
  • the apertures 14, 18 are adjacent and substantially aligned with each other, allowing a threaded fastener such as a bolt 32 or screw to be inserted through the apertures 14, 18 to threadably engage with the nut 30 held between the holding portions 24, 25.
  • Figs. 1 and 2 show the clamp assembly 10 in use.
  • the clamp assembly 10 is fitted over the earth rod 26 so that the earth rod protrudes through the clamp assembly.
  • the conductor 28 is inserted into the clamp assembly 10 alongside the earth rod 26.
  • the shape of the body portion 20 is such that it fits closely around the earth rod and conductor, holding and containing the conductor and the earth rod substantially in alignment with the bolt 32.
  • the bolt 32 is then screwed into the nut 30. As the bolt is tightened, the nut 30 is prevented from rotating by the holding portions 24,25 and the bolt bears against the earth rod 26, urging the earth rod 26 against the conductor 28 to ensure good electrical contact.
  • the conductor is a multi-strand cable.
  • Another common type of conductor is a strip or tape.
  • Fig. 3 shows an alternative embodiment of the clamp for use with tape.
  • the clamp 110 includes two end portions 112, 116, holding portions 124, 125 and an intermediate body portion 120.
  • the end portions 112, 116 each include apertures 114, 118 respectively and overlap so that the apertures 114, 118 are adjacent and substantially aligned with each other.
  • the shape of the clamp closely fits around the earth rod 126 and the tape 128, holding and containing the tape and the earth rod.
  • the holding portions 124, 125 are substantially mutually parallel and spaced apart to accommodate a nut 130 without allowing rotation.
  • the intermediate body portion 120 includes shoulder portions 136 which adjust the spacing of the sides of the clamp 110 from that required to fit around the tape to that required at the holding portions to accommodate the nut.
  • a threaded fastener 132 such as a bolt is inserted through the apertures 114, 118 to engage nut 130.
  • the clamp may be manufactured from steel, by pressing methods, and preferably for corrosion resistance from stainless steel.
  • the steel strip may be swaged during pressing resulting in a reinforcing means 22, 122 in the form of an elongate formation such as a rib or ribs extending the length of the intermediate body portion 20, 120, and in the case of the embodiment shown in Fig. 3, continuing over the shoulder portions 136.
  • the elongate formation 22, 122 defines a recess 23 in the internal surface of the clamp and a corresponding raised area 21 on the outside of the body portion, the recess 23 being substantially semicircular in cross-section and having a radius similar to the thickness of the steel from which the strip is formed.
  • the strip which forms the clamp assembly would be shaped and assembled before fitting as described above.
  • the clamp assembly may, if necessary or convenient, be shaped and assembled in situ, for instance, if replacing an existing clamp or installing an additional clamp on an existing installation.
  • the end portions, holding portions and sides of the intermediate body portions may be opened away from each other allowing the clamp assembly to be positioned around a rod and conductor.
  • the same portions may then be brought back together, the nut positioned between the holding portions, the bolt inserted through the apertures, engaging the nut and tightened to bear upon the conductor or rod to clamp them together.
  • the clamp may be made of any suitable material, and sized to fit any combination of earth rod and conductor.
  • the nut may be loose or fixed in place by some means such as, for example, spot welding, gluing, or crimping of the holding portions.

Landscapes

  • Electric Cable Installation (AREA)
EP01305627A 2001-06-28 2001-06-28 Klemme Withdrawn EP1271696A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP01305627A EP1271696A1 (de) 2001-06-28 2001-06-28 Klemme

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP01305627A EP1271696A1 (de) 2001-06-28 2001-06-28 Klemme

Publications (1)

Publication Number Publication Date
EP1271696A1 true EP1271696A1 (de) 2003-01-02

Family

ID=8182060

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01305627A Withdrawn EP1271696A1 (de) 2001-06-28 2001-06-28 Klemme

Country Status (1)

Country Link
EP (1) EP1271696A1 (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2858119A1 (fr) * 2003-07-22 2005-01-28 Abb Entrelec Sas Dispositif de raccordement electrique a contact protege
FR2949617A1 (fr) * 2009-08-26 2011-03-04 Depagne Connexion electrique comprenant un etrier et un cable electrique
DE102014011558A1 (de) 2013-06-28 2014-12-31 Metec Gmbh Uebigau Kabelklemme
CN106099445A (zh) * 2016-07-19 2016-11-09 郭金泉 电力导线与电力设备连接的跨径设备线夹

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1268162A (en) * 1969-03-10 1972-03-22 Cie Generale Entpr Elec An electrical connector
US3742431A (en) * 1971-07-23 1973-06-26 Arrow Hart Inc Wire connector
FR2341959A1 (fr) * 1976-02-19 1977-09-16 Faeam Borne de raccordement

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1268162A (en) * 1969-03-10 1972-03-22 Cie Generale Entpr Elec An electrical connector
US3742431A (en) * 1971-07-23 1973-06-26 Arrow Hart Inc Wire connector
FR2341959A1 (fr) * 1976-02-19 1977-09-16 Faeam Borne de raccordement

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2858119A1 (fr) * 2003-07-22 2005-01-28 Abb Entrelec Sas Dispositif de raccordement electrique a contact protege
EP1503455A1 (de) * 2003-07-22 2005-02-02 ABB Entrelec Vorrichtung zum elektrischen Verbinden mit einem geschützten Kontakt
FR2949617A1 (fr) * 2009-08-26 2011-03-04 Depagne Connexion electrique comprenant un etrier et un cable electrique
DE102014011558A1 (de) 2013-06-28 2014-12-31 Metec Gmbh Uebigau Kabelklemme
CN106099445A (zh) * 2016-07-19 2016-11-09 郭金泉 电力导线与电力设备连接的跨径设备线夹
CN106099445B (zh) * 2016-07-19 2018-07-20 郭金泉 电力导线与电力设备连接的跨径设备线夹

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