EP0689727A1 - Überspannungsableiter mit äusserer kurzschlusseinrichtung - Google Patents
Überspannungsableiter mit äusserer kurzschlusseinrichtungInfo
- Publication number
- EP0689727A1 EP0689727A1 EP94908274A EP94908274A EP0689727A1 EP 0689727 A1 EP0689727 A1 EP 0689727A1 EP 94908274 A EP94908274 A EP 94908274A EP 94908274 A EP94908274 A EP 94908274A EP 0689727 A1 EP0689727 A1 EP 0689727A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- spring clip
- connecting wire
- electrode
- surge arrester
- tabs
- 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
- 230000002093 peripheral effect Effects 0.000 claims abstract description 4
- 238000004080 punching Methods 0.000 claims description 3
- 238000005476 soldering Methods 0.000 claims description 2
- 230000000284 resting effect Effects 0.000 claims 1
- 239000011888 foil Substances 0.000 abstract 1
- 230000007774 longterm Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910000679 solder Inorganic materials 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000002788 crimping Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 230000036316 preload Effects 0.000 description 1
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
- the invention is in the field of electrical components and can be used in the structural design of a gas-filled three-electrode surge arrester which is provided with an external short-circuit device.
- a short-circuit device serves to protect the surge arrester against long-term loads;
- Such a short-circuit device generally contains a construction element that can be melted at higher temperatures, with the aid of which the center electrode and one or both end electrodes are short-circuited.
- a ring-like spring is clamped onto the central electrode and is provided with lateral arms. These two arms protrude up to the two end electrodes and are kept at a distance from the end electrodes by an insulating washer which is arranged between the center electrode and the spring.
- the insulating washer is made of a heat-fusible material, so that the insulating washer melts in the event of long-term exposure and the ends of the two arms come into contact with the two end electrodes (US Pat. No. 4,984,125).
- a two-armed spring clip is fastened centrally to the center electrode.
- the two free ends of the arms of this spring clip lie isolated on the circumference of the end electrodes.
- the spring clip serves both to design a short-circuit device and to design air spark gaps connected in parallel.
- At the ends of the two arms of the spring clip there is an approximately 20 to 40 ⁇ m thick insulating layer for example, polyurethane paint applied.
- the central part of the spring clip is connected to the radially projecting connecting wire of the central electrode (US Pat. No. 4,912,592).
- a spring clip is also provided as an external short-circuit device.
- the arms of the spring clip protrude axially from the end electrodes of the arrester and their ends lie against the end electrodes, ie axially, with the interposition of an insulating film.
- this is provided in the middle with an opening in the form of an H-shaped punching, between the tabs of which the connecting wire of the center electrode is guided.
- the spring clip is fixed to the connecting wire in the pretensioned state by means of the resilient tabs (WO 90/13904).
- the invention has for its object to choose the design of the spring clip so that it can be easily assembled and that a safe contact to the Endl electrodes is guaranteed.
- the spring clip is arched in such a roof-like manner and that the two arms of the spring clip enclose an obtuse angle between them and rest on the peripheral edge of the respective end electrode.
- the spring clip can be provided with a sufficiently large pretension. Since the arms of the spring clip rest on the end electrodes in a punctiform manner, the insulating layer ensures a safe contact.
- the security for a point-like seating can be increased by the fact that two tabs abutting the peripheral edge of the respective end electrode are formed at the ends of the arms of the spring hanger. This also ensures that the spring clip is secured against rotation.
- Such a configuration of the spring clip is particularly suitable for those conductors in which the connecting wires of all electrodes run radially in the same direction.
- the curvature of the spring clip is appropriately "" chosen so that the arms enclose an obtuse angle of about 110-150 'between them in the untensioned state.
- the spring clip can be fixed to the center electrode or to its connecting wire or connecting pin in a simple manner in a material or, in particular, form-fitting manner.
- the fixing also occurs with the aid of a the connecting wire of the center electrode pushed onto the crimp socket.
- the spring clip is likewise provided with a bore in the area of the curvature and is fixed in the pretensioned state by means of the crimping bush.
- the spring clip in the region of its curvature to form two resilient tabs with an H-shaped punch-out, the distance between the two tabs being smaller than the diameter of the connecting wire of the central electrode, and the spring clip using these tabs to clamp on the connecting wire in the pretensioned state.
- an artificial drops of cloth or a drop of soft solder are deposited on one or both tabs at the point of contact with the connecting wire.
- Figures 1 to 7 Three embodiments of the invention are shown in Figures 1 to 7.
- Figures 1 and 2 show two views of a three-electrode
- FIGS. 3 and 4 in two views a spring clip with
- FIGS. 5 and 6 show a three-electrode arrester with a short-circuiting device, in which the connecting wires of the electrodes protrude radially in the same direction, and FIG. 7 shows an alternative fastening of the spring clip to the connecting wire.
- the surge arrester according to FIGS. 1 and 2 consists in a known manner of the two end electrodes 1 and 2, the center electrode 3 and the two ceramic insulating bodies 4 and 5, which keep the electrodes at a distance.
- the connecting wire 6, which protrudes radially upward, is welded to the center electrode.
- the connecting wires 7 and 8, which run radially downward, are welded to the side of the two end electrodes 4 and 5.
- the surge arrester is further provided with an external short-circuit device, which consists of the spring clip 20 and an insulating film 21 arranged between the spring clip and the end electrodes 1 and 2.
- an external short-circuit device which consists of the spring clip 20 and an insulating film 21 arranged between the spring clip and the end electrodes 1 and 2.
- a metal strip 20 is used to form the spring clip 20, which is provided with a centrally arranged, H-shaped, punched-out stamping 21.
- tabs 22 and 23 are formed, the spacing A of which is smaller than the diameter D of the connecting wire 6 of the center electrode.
- the sheet metal strip 20 according to FIG. 3 is bent according to FIG. 4 to form the spring clip in such a way that a roof-shaped curvature 24 is created.
- the two arms 25 and 26 of the spring clip enclose an angle alpha of approximately 120 ⁇ .
- the tabs 22 and 23 are elastically bent out of their rest position.
- the edges of the tabs dig into the surface of the connecting wire 6, as a result of which the spring clip is fixed in a certain position in which the ends of the arms 25, 26 are under prestress.
- the amount of preload depends on how far the spring clip with its curvature towards the
- the spring clip can be secured against rotation by a soft solder drop or a plastic drop that is applied at the point of contact of the tabs with the connecting wire.
- the connecting wire 6 for the central electrode and the connecting wires 9 and 10 for the end electrodes run radially in the same direction. So that in this case the spring belt 27 does not touch the connecting wires 9 and 10, its ends are provided with a cutout, as shown in FIG. 6. As a result, two tabs 28 and 29 are formed, which on the circumferential edge of the respective end electrode 1, 2 point to point. This configuration also represents an anti-rotation device.
- FIG. 7 shows the fixing of a spring clip 30 to the connecting wire 6 by means of a crimp bushing 31, the spring clip being provided with a bore in the region of its curvature.
Landscapes
- Thermistors And Varistors (AREA)
- Fuses (AREA)
Abstract
Description
Claims
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE9421824U DE9421824U1 (de) | 1993-03-17 | 1994-02-25 | Überspannungsableiter mit äußerer Kurzschlußeinrichtung |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE4309331 | 1993-03-17 | ||
| DE4309331A DE4309331A1 (de) | 1993-03-17 | 1993-03-17 | Überspannungsableiter mit äußerer Kurzschlußeinrichtung |
| PCT/DE1994/000217 WO1994022191A1 (de) | 1993-03-17 | 1994-02-25 | Überspannungsableiter mit äusserer kurzschlusseinrichtung |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0689727A1 true EP0689727A1 (de) | 1996-01-03 |
| EP0689727B1 EP0689727B1 (de) | 1997-07-09 |
Family
ID=6483576
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP94908274A Expired - Lifetime EP0689727B1 (de) | 1993-03-17 | 1994-02-25 | Überspannungsableiter mit äusserer kurzschlusseinrichtung |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US5644465A (de) |
| EP (1) | EP0689727B1 (de) |
| CN (1) | CN1042878C (de) |
| DE (2) | DE4309331A1 (de) |
| ES (1) | ES2105657T3 (de) |
| WO (1) | WO1994022191A1 (de) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| EP1916874B1 (de) * | 2005-09-23 | 2010-11-24 | Eberspächer catem GmbH & Co. KG | Wärmeerzeugendes Element einer Heizvorrichtung |
| US7974063B2 (en) * | 2007-11-16 | 2011-07-05 | Corning Cable Systems, Llc | Hybrid surge protector for a network interface device |
| DE102008062491A1 (de) * | 2008-12-16 | 2010-06-17 | Epcos Ag | Überspannungsableiter mit einer Kurzschlusseinrichtung |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| IN170586B (de) * | 1987-01-07 | 1992-04-18 | Samhwa Electric Ind Co | |
| GB2205992B (en) * | 1987-05-01 | 1991-07-17 | Dubilier Plc | Gas-filled surge arrestor |
| FR2625377A1 (fr) * | 1987-12-23 | 1989-06-30 | Pendar Sarl | Parafoudre de surete |
| JPH0227694U (de) * | 1988-08-10 | 1990-02-22 | ||
| GB2230900A (en) * | 1989-04-24 | 1990-10-31 | Semitron Cricklade Ltd | Electrical components |
| MX172972B (es) * | 1989-05-01 | 1994-01-26 | Porta Systems Corp | Dispositivo de autoajuste de fallas en el tubo de gas para modulos protectores de telefonos |
| US4910489A (en) * | 1989-05-01 | 1990-03-20 | Porta Systems Corp. | Gas tube fail-safe device for telephone protector modules |
| US5027100A (en) * | 1990-02-12 | 1991-06-25 | Porta Systems Corp. | Gas tube fail safe device for telephone protector modules |
| US5029302A (en) * | 1990-08-29 | 1991-07-02 | Illinois Tool Works | Fail safe gas tube |
-
1993
- 1993-03-17 DE DE4309331A patent/DE4309331A1/de not_active Withdrawn
-
1994
- 1994-02-25 US US08/522,352 patent/US5644465A/en not_active Expired - Fee Related
- 1994-02-25 WO PCT/DE1994/000217 patent/WO1994022191A1/de not_active Ceased
- 1994-02-25 CN CN94191791A patent/CN1042878C/zh not_active Expired - Fee Related
- 1994-02-25 DE DE59403317T patent/DE59403317D1/de not_active Expired - Fee Related
- 1994-02-25 ES ES94908274T patent/ES2105657T3/es not_active Expired - Lifetime
- 1994-02-25 EP EP94908274A patent/EP0689727B1/de not_active Expired - Lifetime
Non-Patent Citations (1)
| Title |
|---|
| See references of WO9422191A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1121378A (zh) | 1996-04-24 |
| WO1994022191A1 (de) | 1994-09-29 |
| US5644465A (en) | 1997-07-01 |
| CN1042878C (zh) | 1999-04-07 |
| ES2105657T3 (es) | 1997-10-16 |
| EP0689727B1 (de) | 1997-07-09 |
| DE4309331A1 (de) | 1994-09-22 |
| DE59403317D1 (de) | 1997-08-14 |
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