EP0783195A1 - Arching protection device for coated overhead cables - Google Patents
Arching protection device for coated overhead cables Download PDFInfo
- Publication number
- EP0783195A1 EP0783195A1 EP96203480A EP96203480A EP0783195A1 EP 0783195 A1 EP0783195 A1 EP 0783195A1 EP 96203480 A EP96203480 A EP 96203480A EP 96203480 A EP96203480 A EP 96203480A EP 0783195 A1 EP0783195 A1 EP 0783195A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- electrode
- electrodes
- protection device
- arching
- set forth
- 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- Withdrawn
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Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01T—SPARK GAPS; OVERVOLTAGE ARRESTERS USING SPARK GAPS; SPARKING PLUGS; CORONA DEVICES; GENERATING IONS TO BE INTRODUCED INTO NON-ENCLOSED GASES
- H01T4/00—Overvoltage arresters using spark gaps
- H01T4/10—Overvoltage arresters using spark gaps having a single gap or a plurality of gaps in parallel
- H01T4/14—Arcing horns
Abstract
The invention relates to an arching protection device for coated overhead cables, comprising a first electrode (4, 5) which is fastened to a wire (2) with a clamp (3) penetrating through the wire insulation and a second electrode (6) which is fastened to a pole crossarm or some other insulator support at such a distance from the first electrode that an electric arc can be controllably ignited and sustained between the electrodes. Said electrodes (4, 5 and 6) extend crosswise to each other, whereby movements of the cables (2) do not have a substantial effect on the distance between the electrodes.
Description
- The present invention relates to an arching protection device for coated overhead cables, comprising a first electrode which is fastened to a wire with a clamp penetrating through the wire insulation and a second electrode which is fastened to a pole crossarm or some other insulator support at such a distance from the first electrode that an electric arc can be controllably ignited and sustained between the electrodes.
- The Applicant's patent publication EP-0387865 discloses an arching protection device for coated overhead cables, wherein an electrode is fastened to a wire with a wire-insulation penetrating clamp. This solution has proved to be highly useful and in most cases very functional. The only discovered defect is that one electrode alone does not always function at low short-circuit currents. The inclusion of a second electrode, which is mounted on the crossarm of a pole or some other insulator support at a suitable distance from the wire electrode, enables the controlled ignition of an electric arc even at low short-circuit currents. However, a problem found in such a two-electrode system is that, as the wires are moving in vertical and lateral directions as a result of e.g. trees and ice loads, the distance between electrodes changes and, thus, the functionality of the arching protection device changes as well e.g. in such a manner that a fault may be caused by circuit overloads.
- An object of the invention is to eliminate this problem and to provide an arching protection device of the above type, wherein the distance between electrodes does not substantially change as a result of movements undertaken by the wires.
- This object is achieved by means of a solution as set forth in claim 1. The non-independent claims disclose preferred embodiments for the invention.
- One exemplary embodiment of the invention will now be described in more detail with reference made to the accompanying drawing, in which
- fig. 1
- shows an arching protection device of the invention in a side view and
- fig. 2
- shows the same in the direction of a line.
- An insulator 1 mounted on the crossarm of a pole or some other insulator support carries a coated overhead cable 2, to which is fastened a first
arching protection horn 4 by means of aclamp 3. Theprotection horn 4 is a rod-like electrode, which is dimensioned to withstand an electric arc. For improved endurance, theprotection horn 4 may have its end provided with a thickening 5. Thebarrier horn 4 extends crosswise relative to the wire 2, in the present case downwards. Theclamp 3 is provided with teeth 3a which pierce through the insulation of the wire 2 as clampingscrews 3b are tightened. This establishes a galvanic contact from the wire 2 by way of theclamp 3 to theprotection horn 4, 5. - In the depicted case, a
second electrode 6 takes the form of a horizontal rod, which is attached to a pole crossarm or some other insulator support or an insulator by means of a multi-section arm whosearm sections elements 8 and 10. Adjustment of thearms electrodes arms 7 and 9 an be used for adjusting the vertical position of theelectrode 6, which in the operative condition is located slightly above the level of the bottom end 5 of thefirst electrode 5, 4. One or bothelectrodes bird guards 12 in order to eliminate faults possibly caused by birds and small animals. Thebird guard 12 comprises a plastic insulation coating, which leaves an electric-arc discharge area uncovered. - An essential feature in the invention is that the
electrodes electrode 4 moves in vertical or lateral direction, its distance from theelectrode 6 does not substantially change, which also enables the controlled ignition of an electric arc. - The invention is not limited to the above-described exemplary embodiment. For example, the electrodes may have an orientation which is different from what is described above, such that the
electrode 4 has its end provided with a horizontal section which extends crosswise to a vertical electrode replacing theelectrode 6. By using suspended insulator chains, theelectrode rod 4 can also be directed upwards. The electrodes may also have a cross-section which varies from a round rod to a more or less flat plate. The connection between theelectrode 4 and theclamp 3 can also be implemented in a variety of ways, e.g. with a separate screw attachment.
Claims (7)
- An arching protection device for coated overhead cables, comprising a first electrode (4, 5) which is fastened to a wire (2) with a clamp (3) penetrating through the wire insulation and a second electrode (6) which is fastened to a pole crossarm or some other insulator support at such a distance from the first electrode that an electric arc can be controllably ignited and sustained between the electrodes, characterized in that said electrodes (4, 5 and 6) extend crosswise to each other, whereby movements of the cables (2) do not have a substantial effect on the distance between the electrodes.
- An arching protection device as set forth in claim 1, characterized in that the first electrode (4, 5) extends down- or upwards and the second electrode (6) is elongated in horizontal direction and that both electrodes (4, 5; 6) lie transversely relative to the wire (2).
- An arching protection device as set forth in claim 2, characterized in that the second electrode (6) is located slightly above the level of the bottom end (5) or below the top end of the first electrode (5, 4).
- An arching protection device as set forth in any of claims 1-3, characterized in that the electrodes (4, 5 and 6) are substantially rod-shaped.
- An arching protection device as set forth in any of claims 1-4, characterized in that the vertical position and distance of the second electrode (6) from the first electrode (4, 5) are adjustable by means of adjusting elements (8-10).
- An arching protection device as set forth in any of claims 1-5, characterized in that the supporting arm of the second electrode (6) consists of several arm sections (7, 9, 11), which are attachable to each other in various relative positions for adjusting the distance between the electrodes and preferably also for the vertical adjustment of the second electrode (6).
- An arching protection device as set forth in any of claims 1-6, characterized in that at least one of the electrodes (6, 4) is protected by means of a bird guard (12).
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FI960019A FI99060C (en) | 1996-01-03 | 1996-01-03 | Arc protector for a coated overhead line |
FI960019 | 1996-01-03 |
Publications (1)
Publication Number | Publication Date |
---|---|
EP0783195A1 true EP0783195A1 (en) | 1997-07-09 |
Family
ID=8544664
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP96203480A Withdrawn EP0783195A1 (en) | 1996-01-03 | 1996-12-09 | Arching protection device for coated overhead cables |
Country Status (10)
Country | Link |
---|---|
EP (1) | EP0783195A1 (en) |
CZ (1) | CZ285203B6 (en) |
EE (1) | EE03498B1 (en) |
FI (1) | FI99060C (en) |
HR (1) | HRP970008B1 (en) |
HU (1) | HUP9603500A3 (en) |
NO (1) | NO314779B1 (en) |
PL (1) | PL180946B1 (en) |
RO (1) | RO112941B1 (en) |
RU (1) | RU2197050C2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104361960A (en) * | 2014-12-02 | 2015-02-18 | 国家电网公司 | Parallel gap lightning protector with oscillating arm electrode |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE720623C (en) * | 1939-02-23 | 1942-05-11 | Siemens Ag | Attachment of surge arresters |
JPS63289727A (en) * | 1987-05-20 | 1988-11-28 | Chubu Electric Power Co Inc | Ornithic damage preventing device |
EP0387865A1 (en) | 1989-03-17 | 1990-09-19 | Oy Sekko Ab | Spark protection device for insulated conductors, particularly for air lines |
JPH0434810A (en) * | 1990-05-29 | 1992-02-05 | Ngk Insulators Ltd | Discharge electrode of lightning insulator set |
JPH0778531A (en) * | 1993-09-08 | 1995-03-20 | Ngk Insulators Ltd | Arcing horn |
JPH07272824A (en) * | 1994-03-29 | 1995-10-20 | Ngk Insulators Ltd | Arresting horn insulator device |
-
1996
- 1996-01-03 FI FI960019A patent/FI99060C/en not_active IP Right Cessation
- 1996-12-09 EP EP96203480A patent/EP0783195A1/en not_active Withdrawn
- 1996-12-13 PL PL96317476A patent/PL180946B1/en unknown
- 1996-12-18 HU HU9603500A patent/HUP9603500A3/en unknown
- 1996-12-19 RO RO96-02430A patent/RO112941B1/en unknown
- 1996-12-30 RU RU96124794/09A patent/RU2197050C2/en active
-
1997
- 1997-01-02 NO NO19970011A patent/NO314779B1/en unknown
- 1997-01-02 CZ CZ971A patent/CZ285203B6/en not_active IP Right Cessation
- 1997-01-03 HR HR970008A patent/HRP970008B1/en not_active IP Right Cessation
- 1997-01-03 EE EE9700001A patent/EE03498B1/en not_active IP Right Cessation
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE720623C (en) * | 1939-02-23 | 1942-05-11 | Siemens Ag | Attachment of surge arresters |
JPS63289727A (en) * | 1987-05-20 | 1988-11-28 | Chubu Electric Power Co Inc | Ornithic damage preventing device |
EP0387865A1 (en) | 1989-03-17 | 1990-09-19 | Oy Sekko Ab | Spark protection device for insulated conductors, particularly for air lines |
JPH0434810A (en) * | 1990-05-29 | 1992-02-05 | Ngk Insulators Ltd | Discharge electrode of lightning insulator set |
JPH0778531A (en) * | 1993-09-08 | 1995-03-20 | Ngk Insulators Ltd | Arcing horn |
JPH07272824A (en) * | 1994-03-29 | 1995-10-20 | Ngk Insulators Ltd | Arresting horn insulator device |
Non-Patent Citations (4)
Title |
---|
PATENT ABSTRACTS OF JAPAN vol. 013, no. 117 (E - 731) 22 March 1989 (1989-03-22) * |
PATENT ABSTRACTS OF JAPAN vol. 016, no. 210 (E - 1203) 19 May 1992 (1992-05-19) * |
PATENT ABSTRACTS OF JAPAN vol. 95, no. 003 * |
PATENT ABSTRACTS OF JAPAN vol. 95, no. 010 * |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104361960A (en) * | 2014-12-02 | 2015-02-18 | 国家电网公司 | Parallel gap lightning protector with oscillating arm electrode |
CN104361960B (en) * | 2014-12-02 | 2016-08-24 | 国家电网公司 | A kind of band can the parallel gap lightning protection device of swing arm electrode |
Also Published As
Publication number | Publication date |
---|---|
EE9700001A (en) | 1997-08-15 |
FI99060B (en) | 1997-06-13 |
NO970011D0 (en) | 1997-01-02 |
RU2197050C2 (en) | 2003-01-20 |
NO970011L (en) | 1997-07-04 |
EE03498B1 (en) | 2001-08-15 |
HUP9603500A2 (en) | 1998-01-28 |
HUP9603500A3 (en) | 1999-03-29 |
CZ197A3 (en) | 1997-07-16 |
PL180946B1 (en) | 2001-05-31 |
FI99060C (en) | 1997-09-25 |
CZ285203B6 (en) | 1999-06-16 |
HU9603500D0 (en) | 1997-02-28 |
PL317476A1 (en) | 1997-07-07 |
FI960019A0 (en) | 1996-01-03 |
HRP970008A2 (en) | 1998-04-30 |
RO112941B1 (en) | 1998-01-30 |
NO314779B1 (en) | 2003-05-19 |
HRP970008B1 (en) | 2003-02-28 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AT DE ES FR GB PT SE |
|
AX | Request for extension of the european patent |
Free format text: LT PAYMENT 961216;LV PAYMENT 961216;SI PAYMENT 961216 |
|
17P | Request for examination filed |
Effective date: 19971113 |
|
17Q | First examination report despatched |
Effective date: 19980113 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
18D | Application deemed to be withdrawn |
Effective date: 19980526 |