EP2371045A1 - Überspannungsableiter mit einer kurzschlusseinrichtung - Google Patents
Überspannungsableiter mit einer kurzschlusseinrichtungInfo
- Publication number
- EP2371045A1 EP2371045A1 EP09797023A EP09797023A EP2371045A1 EP 2371045 A1 EP2371045 A1 EP 2371045A1 EP 09797023 A EP09797023 A EP 09797023A EP 09797023 A EP09797023 A EP 09797023A EP 2371045 A1 EP2371045 A1 EP 2371045A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- short
- electrode
- spring arm
- surge arrester
- circuit device
- 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.)
- Granted
Links
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
- H01T1/00—Details of spark gaps
- H01T1/14—Means structurally associated with spark gap for protecting it against overload or for disconnecting it in case of failure
Definitions
- An object to be solved is to provide a surge arrester with a short-circuit device, which can be produced inexpensively and has a compact design.
- the invention relates to a surge arrester having a short-circuiting device, wherein the short-circuiting device is arranged on the outside of the surge arrester and has at least one base element which is connected to a first one
- Electrode of the surge arrester is electrically conductive and mechanically firmly connected.
- the short-circuiting device has at least one spring arm arranged on the base element of the short-circuiting device.
- the free end of the spring arm is spaced from the base member and preferably extends over a length of at least two adjacent electrodes of the surge absorber.
- the tension of the spring arm is at least so long that it extends over the distance of two adjacent electrodes of the surge arrester.
- the base member and the spring arm are electrically connected together.
- a spring arm associated with the web connects the non-free end of the spring arm with the base element.
- the web is preferably arranged above an end-side electrode of the surge arrester and at one end of the base element.
- the spring arm has a length that extends or exceeds about the entire length of the surge arrester. This can be achieved with a thick metal strip spring arm as a good spring effect.
- the contact pressure of the spring arm on the short-circuited electrode is sufficiently large enough to guarantee a secure electrical connection between the spring arm and the electrode of the surge arrester, if there are still remnants of a fusible element between the spring arm at such executed short-circuiting device with a spring arm of a thick metal strip and the electrode.
- the short-circuit device comprises a one-piece component, wherein the component has at least one base element and at least one spring arm.
- the component is made of a stamped part.
- the base element of the short-circuiting device is connected to the center electrode of a 3-electrode surge arrester.
- the at least one base member is welded to the first electrode, i. the center electrode of the arrester, mechanically and electrically connected.
- the short-circuiting device has at least two spring arms. In another embodiment, however, it is also possible that the short-circuiting device has more than two spring arms.
- the two spring arms are preferably arranged on both sides of the base element in the direction of the longitudinal axis of the surge arrester.
- both spring arms of the short-circuiting device are spaced from at least a second and a third electrode of the surge absorber.
- the second and third electrodes are the outer electrodes of a 3-electrode surge arrester.
- the first spring arm is preferably in the direction of the second
- the second spring arm is preferably prestressed in the direction of the third electrode of the arrester in order to contact it in the event of a fault. This creates a short circuit between the center electrode and the outer electrodes.
- the development of the short-circuit device is symmetrical, in particular point-symmetrical to the center of the settlement.
- the spring arms each have at least one free end. Furthermore, the spring arms each have a further end with the web, which is connected to the base element of the short-circuiting device. In one embodiment, the web is disposed between the further end of the spring arm and the base member at a portion of the base member.
- the base member has a strip-like shape. - A -
- one or more subregions are arranged at the ends of the base element, which are preferably arranged perpendicular to the longitudinal direction of the base element. These portions of the base member contact the spring arms electrically and mechanically.
- two base elements are connected to each other via associated subregions or webs, wherein the spring arms are preferably arranged between the base elements.
- the short-circuiting device has at least two spring arms, which are connected via the webs and the subregions of the base element to the at least one base element.
- the spring arms are arranged via webs at the opposite ends of the at least one base element.
- each spring arm is spaced in the region of its free end by means of an element of easily fusible material from at least one electrode of the surge arrester.
- the first spring arm of the short-circuiting device is preferably spaced from the second electrode by means of an element of easily fusible material.
- the second spring arm of the short-circuiting device is preferably spaced from the third electrode of the arrester by means of an element of easily fusible material.
- the preloaded spring arms are spaced in the aforementioned embodiment by means of the elements of fusible material from the outer electrodes of the arrester.
- the prestressed spring arms are also spaced from the center electrode of the arrester.
- the spring arms have an electrically conductive connection to the first electrode, the center electrode of the arrester.
- the fusible material element comprises an electrically insulating material, such as a polymer.
- the element of fusible material comprises an electrically conductive material, such as a soft solder.
- the element of fusible material may also comprise other materials which are suitable for safely triggering the short-circuiting device in the event of excessive heating of the surge arrester.
- the element of fusible material comprises a soft solder
- the element is preferably arranged between one of the subregions of the base element and the spring arm.
- a 3-electrode surge arrester it is possible to arrange the solder between the center electrode and the spring arm.
- the element of fusible material comprises a polymer or an electrically insulating material
- the element can also be arranged between the spring arm and a subregion of the base element.
- the element of fusible material is disposed between the spring arm and an electrode of the arrester, the element preferably comprises an electrically insulating material.
- the element of fusible material is also disposed between other elements of the surge arrester, such as a ceramic insulator and the spring arm, wherein in the regular operating mode is always ensured that the spring arm is spaced from the outer electrodes of the arrester.
- the element of meltable material melts and the spring arm causes a short circuit between the outer electrodes and the center electrode or, in the case of 2-electrode arresters, between the outer electrodes.
- the prestressed spring arm is pressed by the spring tension on one of the outer electrodes of the arrester. This creates a direct electrical connection between the outer electrodes or between the outer electrode and the center electrode of the arrester via the short-circuit device.
- the short circuit prevents further heating of the arrester, whereby damage is prevented by further heating of the arrester.
- the arrester If the arrester is excessively heated, it is short-circuited via the base element and at least one spring arm of the short-circuit device.
- the short-circuiting device has two base elements. However, it is also possible for the short-circuit device to have more than two base elements.
- the base elements are connected to one another via partial regions of the base element arranged thereon or via webs, whereby the partial regions are preferably arranged at the respective ends of the base elements.
- the two base elements, together with the intermediate portions form a frame with an approximately quadrangular shape.
- the four major sides of the quadrilateral are arranged in a rectangle.
- the corner regions of the rectangle may have oblique sections in one embodiment.
- At least one spring arm is arranged between two base elements. However, it can also be arranged a plurality of spring arms between the two base elements of the short-circuiting device.
- the base elements and the spring elements can be arranged in any desired order with respect to one another, thus also outside the base element (s).
- the base elements are each connected to the center electrode, i. the first electrode of the arrester electrically conductive and mechanically firmly connected.
- the development of the short-circuiting device has a rectangular outer contour.
- the outer contour of the short-circuit device is understood to be the outline of the short-circuit device, which is determined by the base element (s) and the spring arms.
- a rectangular outer contour has advantages, especially in the production, since in the manufacture of the short-circuiting device Thus little or as good as no waste occurs.
- the material of the short-circuiting device contains copper beryllium.
- the short-circuiting device consists of another suitable material.
- a relatively long spring arm is available.
- a thin sheet metal strip is preferably used as a spring arm.
- the short-circuit device described above thus has a large spring travel in a compact design.
- FIG. 1 shows an embodiment of the short-circuiting device on a three-electrode arrester, wherein the
- Short-circuit device comprises a base member and two spring arms
- FIG. 2 schematically shows a development of the short-circuit device according to FIG. 1,
- FIG. 3 shows an embodiment of the short-circuiting device on a three-electrode surge arrester, in which the short-circuiting device has a base element and two spring elements, wherein the base element has partial regions on which the spring arms are held by means of a fusible material,
- FIG. 4 shows the development according to the short-circuiting device according to FIG. 3,
- FIG. 5 shows an embodiment of the short-circuit device on a three-electrode surge arrester, in which the short-circuit device has two base elements and two spring arms,
- FIG. 6 schematically shows the development according to the short-circuiting device according to FIG. 5.
- FIG. 1 shows a surge arrester 1 with a first embodiment of an external short-circuit device.
- the surge arrester 1 has three electrodes 2, 3, 4, wherein a first electrode 2 as a center electrode and a second 3 and third 4 electrode are formed as outer and end electrodes.
- the surge arrester 1 has, between the electrodes 2, 3, 4, a preferably ceramic, gas-filled insulating body.
- the short-circuiting device has a base element 5, the center of the first electrode 2 electrically conductive and mechanically fixed, z. B. soldered or welded.
- the base element 5 extends in the longitudinal direction of the surge arrester 1 as far as the second electrode 3 and third electrode 4 of the surge arrester 1, the base element 5 being spaced from the second electrode 3 and the third electrode 4 by a bend in the end regions.
- a respective spring arm 6, 7 is arranged parallel to and on both sides of the base element 5.
- the spring arms 6, 7 are connected directly and integrally with the base element 5. Between the actual, substantially strip-shaped, base element 5 and each spring arm 6, 7 are each a portion 12, 13 of the base member 5 and a web 14, 15 are arranged. Between the free area of the spring elements 6, 7 and the base member 5 thus remains a gap or distance.
- the spring arms 6, 7 each have a free
- the regions of the spring arms 6, 7 which are opposite the free ends 9, 10 are connected to the base element 5 directly or via webs or partial regions of the base element 5.
- the spring arms 6, 7 preferably extend over at least two adjacent electrodes 2, 3 or 2, 4 of the surge arrester 1.
- the first spring arm 6 extends over all three electrodes and is of the electrodes 2, 3, 4 of the surge arrester
- first spring arm 6 is biased at its free end 9 in the direction of the second electrode 3.
- element 11 is arranged made of fusible material, which is covered in the figure 1 by the spring arm 6.
- II preferably comprises an electrically insulating material, such as, for example, a readily meltable polymer.
- the second spring arm 7 is arranged point-symmetrical to the connection point of the base member with the first electrode to the base member and like the first spring arm 6 from the electrodes 2, 3, 4 of the surge arrester 1, wherein the second spring arm 7 in the region of its free end 10 in the direction the third electrode 4 is biased.
- an electrically insulating member 11 is disposed of fusible material.
- the element 11 melts between the spring arms 6, 7 and the second or third electrode so that the spring arms 6, 7 contact these electrodes and between the base element 5 and the first electrode 2 and the second 3 or third 4 electrode of the surge arrester 1, a short circuit is formed.
- the short circuit between the electrodes prevents further heating of the overvoltage arrester 1, so that the surge arrester 1 is protected against destruction.
- FIG. 2 schematically shows a planar development of the short-circuiting device according to FIG. 1.
- the development has the central base element 5, from which parallel to the Base member 5 two spring arms 6, 7 extend in opposite directions.
- the first spring arm 6 is spaced over a portion 12 of the base member 5 and the web 14 of the base member 5. In the illustrated embodiment, the first spring arm 6 extends to its free end 9 parallel to the base member 5.
- the second spring arm 7 is symmetrical about a portion 13 of the base member 5 and the web 15 spaced therefrom. In the illustrated embodiment, the second spring arm 7 extends to its free end 10 parallel to the base member. 5
- the two spring arm 6, 7 obliquely to each other and / or obliquely to the base element 5 are arranged net.
- the development shown in FIG. 2 corresponds approximately to the raw form of the short-circuit device punched out of a sheet metal.
- the dashed lines represent edges at which the stamped raw shape is bent, so that the shape of the short-circuit device shown in Figure 1 is formed.
- the outline of the settlement comprises approximately a quadrilateral. In the production of the short-circuiting device thus produces little waste. The short-circuit device can thus be relatively easily and inexpensively.
- the short-circuit device comprises a central base element 5, which is electrically conductively and mechanically stably connected to the first electrode 2, the center electrode of the surge arrester 1.
- the short-circuiting device On both sides of the 5 in the direction of the longitudinal axis of the surge arrester, the short-circuiting device comprises a first 6 and a second 7 spring arm which are aligned parallel to the base element 5 and laterally spaced therefrom.
- the regions of the spring arms 6, 7 opposite the free ends 9, 10 are connected directly to the base element 5 via respective webs 14, 15.
- the spring arms 6, 7 are electrically conductively connected to the first electrode 2 of the surge arrester 1 via the base element 5 of the short-circuiting device.
- the first spring arm 6 is in the regular operating state of the electrodes 2, 3, 4 of the surge arrester 1 spaced, wherein the first spring arm 6 is biased at its free end 9 in the direction of the second electrode 3.
- an element 11 of fusible material is arranged, which is covered in the figure 1 by the portion 12 of the base member 5.
- the element 11 comprises in the embodiment shown in Figure 1, for example, a soft solder.
- the element 11 of fusible material comprises a polymer or otherwise suitable, easily fusible material.
- the element 11 is electrically conductive or insulating, since there is no indirect contact with the second 3 or third 4 electrode of the surge arrester 1 via the element 11.
- the second spring arm 7 is symmetrically spaced in the regular operating state from the electrodes 2, 3, 4 of the surge arrester 1, the second spring arm 7 being biased in the direction of the third electrode 4 in the region of its free end 10. Between the second spring arm 7 and a portion 13 of the base member 5, an element 11 is disposed of fusible material.
- FIG. 3 shows the fault situation of the short-circuiting device, in which an excessively high heating of the surge arrester 1 has melted the elements 11 between the spring arms 6, 7 and the subareas 12, 13 of the base element 5, so that via the ends 9, 10 of the spring arms 6, 7 and the base member 5, a short circuit between the first electrode 2 and the second electrode 3 and the third electrode 4 of the surge arrester 1 is present.
- FIG. 4 schematically shows a planar development of the short-circuiting device according to FIG. 3.
- the dashed lines represent edges on which the blanked out punched shape is bent, so that the shape of the short-circuiting device illustrated in FIG. 3 is formed.
- the short-circuiting device has a central base element 5, from which two spring arms 6, 7 extend in opposite directions parallel to the base element 5. In the region of the free ends 9, 10 of the spring arms 6, 7, subregions 12, 13 of the base element 5 are arranged, which are aligned perpendicular to the base element 5.
- the development shown in FIG. 4 corresponds approximately to the raw form of the short-circuit device punched out of a sheet metal.
- the outline of the settlement corresponds approximately to a quadrangle, wherein the corner regions are chamfered.
- the holes 16, 17 serve to connect the portions 12 and 13 with the spring arms 9 and 10 by means of the element 11th
- FIG. 5 shows a further embodiment of a short-circuiting device which is arranged on a surge arrester 1 with three electrodes 2, 3, 4.
- the short-circuiting device comprises in the illustrated embodiment two base elements 5, 8, between which two spring arms 6, 7 are arranged.
- the base elements 5, 8 are electrically conductive and mechanically strong, z. B. by soldering or welding, with the first electrode 2 of the surge arrester 1 connected.
- the spring arms 6, 7 are arranged parallel to one another and parallel with respect to the two base elements 5, 8.
- the two spring arms 6, 7 are directly electrically connected to the base elements 5, 8, wherein the spring arms 6, 7 are spaced apart.
- the spring arms 6, 7 each have a free end 9, 10.
- the regions of the spring arms 6, 7 which are opposite the free ends 9, 10 are connected directly to the base elements 5, 8 via respective webs 14, 15.
- the first spring arm 6 is preferably spaced from the electrodes 2, 3, 4 of the surge arrester 1, the first spring arm 6 being biased at its free end 9 in the direction of the third electrode 4.
- an element 11 is disposed of fusible material.
- the element 11 comprises in the embodiment shown in Figure 5, for example, a soft solder.
- an element 11 is disposed of fusible material.
- FIG. 5 shows the state of the short-circuiting device in the event of a fault in which an excessively high heating of the surge arrester 1 has caused the element 11 to melt between the spring arms 6, 7 and the subareas 12, 13 of the base elements 5, 8, so that via the spring arms 6, 7 and the base elements 5, 8 there is a short circuit between the first 2 and the second 3 or third 4 electrode of the surge arrester 1.
- FIG. 6 schematically shows the development of the short-circuit device according to the short-circuit device, which is illustrated in FIG.
- the development has a closed region with two base elements 5, 8, which are connected to one another via partial regions 12, 13. Between the base elements 5, 8 two spring arms 6, 7 are arranged, which are each connected to a web 14, 15 with the base elements 5, 8 or partial areas 12, 13 with the base elements 8, 5. In the region of the free ends 9, 10 of the spring arms 6, 7, these are separated from the partial areas 12, 13 of the base elements 5, 8 and have no connections, so that the spring arms 6, 7 at their free ends 9, 10 after are freely movable above and below.
- the dashed lines in Figure 6 represent edges through which the short-circuiting device can be brought into the desired shape.
- the edges may be formed by depressions of the starting material, so that an easier processing of the short-circuiting device can be carried out during subsequent deformation.
- the short-circuiting device it is possible for the short-circuiting device to comprise a plurality of base elements, which are arranged, for example, between a plurality of spring arms.
- the short-circuit device can also be designed for 2-electrode surge arresters.
- the base member is then firmly connected to one of the two electrodes.
Landscapes
- Fuses (AREA)
- Thermistors And Varistors (AREA)
- Protection Of Static Devices (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102008062491A DE102008062491A1 (de) | 2008-12-16 | 2008-12-16 | Überspannungsableiter mit einer Kurzschlusseinrichtung |
PCT/EP2009/067307 WO2010076223A1 (de) | 2008-12-16 | 2009-12-16 | Überspannungsableiter mit einer kurzschlusseinrichtung |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2371045A1 true EP2371045A1 (de) | 2011-10-05 |
EP2371045B1 EP2371045B1 (de) | 2012-08-15 |
Family
ID=41683524
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP09797023A Not-in-force EP2371045B1 (de) | 2008-12-16 | 2009-12-16 | Überspannungsableiter mit einer kurzschlusseinrichtung |
Country Status (6)
Country | Link |
---|---|
US (1) | US8547678B2 (de) |
EP (1) | EP2371045B1 (de) |
JP (1) | JP5401559B2 (de) |
CN (1) | CN102246370B (de) |
DE (1) | DE102008062491A1 (de) |
WO (1) | WO2010076223A1 (de) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2812963B1 (de) * | 2012-02-08 | 2016-04-06 | OBO Bettermann GmbH & Co. KG | Überspannungsableiter |
DE102014103419B4 (de) * | 2014-03-13 | 2018-05-24 | Epcos Ag | Überspannungsableiter mit Schutz vor Erwärmung |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
MX9303916A (es) * | 1992-06-30 | 1994-04-29 | Raychem Corp | Mecanismo de sobrecarga termica, de limite de seguridad, detenedor de corriente transitoria anormal. |
DE4309331A1 (de) * | 1993-03-17 | 1994-09-22 | Siemens Ag | Überspannungsableiter mit äußerer Kurzschlußeinrichtung |
JP2794223B2 (ja) * | 1994-02-01 | 1998-09-03 | 旭化成工業株式会社 | 新規な変性環状分子構造単位含有重合体 |
DE19622461B4 (de) * | 1996-05-24 | 2005-04-21 | Epcos Ag | Gasgefüllter Überspannungsableiter mit äußerer Kurzschlußeinrichtung |
DE19708651A1 (de) * | 1997-02-21 | 1998-09-03 | Siemens Ag | Gasgefüllter Überspannungsableiter mit äußerer Kurzschlußeinrichtung |
DE19823446B4 (de) * | 1998-05-18 | 2009-08-27 | Epcos Ag | Baugruppe zum Schutz von Telekommunikationseinrichtungen gegen Überspannungen |
DE10162916A1 (de) | 2001-12-20 | 2003-07-10 | Epcos Ag | Federbügel, Überspannungsableiter mit dem Federbügel und Anordnung eines Überspannungsableiters |
-
2008
- 2008-12-16 DE DE102008062491A patent/DE102008062491A1/de not_active Ceased
-
2009
- 2009-12-16 JP JP2011541410A patent/JP5401559B2/ja not_active Expired - Fee Related
- 2009-12-16 EP EP09797023A patent/EP2371045B1/de not_active Not-in-force
- 2009-12-16 CN CN200980151600.5A patent/CN102246370B/zh not_active Expired - Fee Related
- 2009-12-16 WO PCT/EP2009/067307 patent/WO2010076223A1/de active Application Filing
-
2011
- 2011-06-16 US US13/162,215 patent/US8547678B2/en not_active Expired - Fee Related
Non-Patent Citations (1)
Title |
---|
See references of WO2010076223A1 * |
Also Published As
Publication number | Publication date |
---|---|
CN102246370A (zh) | 2011-11-16 |
US20110299211A1 (en) | 2011-12-08 |
US8547678B2 (en) | 2013-10-01 |
CN102246370B (zh) | 2014-08-06 |
EP2371045B1 (de) | 2012-08-15 |
JP2012512626A (ja) | 2012-05-31 |
DE102008062491A1 (de) | 2010-06-17 |
JP5401559B2 (ja) | 2014-01-29 |
WO2010076223A1 (de) | 2010-07-08 |
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