EP0443286A1 - Blitzschutzvorrichtung für elektrische Leitungen - Google Patents
Blitzschutzvorrichtung für elektrische Leitungen Download PDFInfo
- Publication number
- EP0443286A1 EP0443286A1 EP90420085A EP90420085A EP0443286A1 EP 0443286 A1 EP0443286 A1 EP 0443286A1 EP 90420085 A EP90420085 A EP 90420085A EP 90420085 A EP90420085 A EP 90420085A EP 0443286 A1 EP0443286 A1 EP 0443286A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- tube
- lumen
- varistors
- stack
- capsules
- 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
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01C—RESISTORS
- H01C7/00—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material
- H01C7/10—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material voltage responsive, i.e. varistors
- H01C7/12—Overvoltage protection resistors
- H01C7/126—Means for protecting against excessive pressure or for disconnecting in case of failure
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01C—RESISTORS
- H01C7/00—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material
- H01C7/10—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material voltage responsive, i.e. varistors
- H01C7/12—Overvoltage protection resistors
Definitions
- the present invention relates to surge protective devices intended for the protection of power lines, in particular of medium voltage overhead lines.
- the invention especially refers to surge arresters in which the insulating element disposed between the two terminal connection capsules is constituted by a stack of varistors based on zinc oxide (ZnO) maintained under axial pressure. It is known that in normal operation, such a stack has insulation characteristics which oppose any passage of current between the two connection capsules, while under the effect of a sudden rise in the nominal voltage due to the fall of lightning on the protected line, it temporarily becomes conductive by ensuring the earthing of said line.
- ZnO zinc oxide
- the usual rigid tube which encloses the insulation element is cut out with at least one lumen while the envelope is directly produced by molding on said element so that the synthetic resin penetrates the inside said tube and coats the stack of varistors which constitutes with the connection capsules the insulating element.
- the ends of the outer casing of molded resin are profiled to present a lip with circular profile which is oriented axially towards the outside in order to come to engage in a corresponding annular housing. formed in each of two metal members forming contacts for mounting the arrester device.
- reference 1 designates each of the varistors based on zinc oxide, the stacking of which constitutes the insulating element of the arrester device to be produced. This stack is supported against a connection capsule 2 and receives the action of a spring 3 associated with another connection capsule 4.
- the assembly 1-2-3-4 thus formed is housed with reduced play inside. of a tube 5 made of glass laminate, firmly made integral with the two terminal capsules 2 and 4 by means of transverse pins 6.
- the tube 5 is cut out from longitudinal slots 5 a (cf. FIG. 3), three in number in the exemplary embodiment envisaged. Each of these lights has 5 stops short of fixing pins 6.
- the assembly or core shown in fig. 1 is then placed inside an injection mold, shaped so that the injected synthetic resin forms an envelope 7 (fig. 2) which coats said together by determining external fins 7 a projecting.
- the resin injected advantageously constituted by a silicone-based elastomer, penetrates inside the tube 5 through the openings 5 a thereof, so that a total filling is obtained, without any bubbles d air, from the annular gap between the varistors 1 and the tube 5, as illustrated in FIG. 4.
- the casing 7 opens towards the outside by defining an axial lip 7 b with a circular profile.
- Each of these lips 7 b is in fact intended to be forcibly engaged within an annular housing 8 has (Fig. 5) provided for this purpose in a clean metal member to form outer contact connection, consisting by an end cap 8 reported at each end of the casing 7, the fixing of said cups being effected with the aid of threaded bolts 9 are screwed into threaded bores 4a, respectively 2a, the capsules 4 and 2.
- the appearance of an arc along the stack of varistors 1 causes the carbonization and / or the melting of the resin which fills the openings 5 a , so that under the effect of the pressure of the gases generated, the casing 7 tears along the generators corresponding to the aforementioned lights. Such a tear allows the escape of gases into the atmosphere, without sudden explosion.
- Fig. 6 illustrates a variant implementation of the invention, according to which the rigid tube, here referenced 15, is cut from a lumen 15 a with helical profile which thus replaces the longitudinal lumens 5 a and which gives said tube 15 elastic deformability in the axial direction such as by assigning it a calculated length so that the mounting of the varistors 1 and of the capsules 2 and 4 implies a pulling effect at the level of the tube 15, one can dispense with the spring 3 intended to operate the initial compression of the stack of varistors 1.
Landscapes
- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Emergency Protection Circuit Devices (AREA)
- Thermistors And Varistors (AREA)
- Non-Insulated Conductors (AREA)
- Insulated Conductors (AREA)
- Parts Printed On Printed Circuit Boards (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR8817618A FR2641423B1 (fr) | 1988-12-30 | 1988-12-30 | Dispositif parafoudre pour la protection des lignes electriques |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0443286A1 true EP0443286A1 (de) | 1991-08-28 |
EP0443286B1 EP0443286B1 (de) | 1994-04-27 |
Family
ID=9373740
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP90420085A Expired - Lifetime EP0443286B1 (de) | 1988-12-30 | 1990-02-20 | Blitzschutzvorrichtung für elektrische Leitungen |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP0443286B1 (de) |
AT (1) | ATE105102T1 (de) |
DE (1) | DE69008510T2 (de) |
DK (1) | DK0443286T3 (de) |
ES (1) | ES2051491T3 (de) |
FR (1) | FR2641423B1 (de) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2685532A1 (fr) * | 1991-12-20 | 1993-06-25 | Soule Sa | Parafoudre a proprietes mecaniques perfectionnees. |
FR2685533A1 (fr) * | 1991-12-20 | 1993-06-25 | Soule Sa | Parafoudre comprenant une piece de contact perfectionnee. |
WO1993026017A1 (en) * | 1992-06-18 | 1993-12-23 | Raychem Corporation | Electrical surge arrester |
FR2747500A1 (fr) * | 1996-04-12 | 1997-10-17 | Soule Materiel Electr | Parafoudre perfectionne a base de varistances |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2641423B1 (fr) * | 1988-12-30 | 1991-05-24 | Ferraz | Dispositif parafoudre pour la protection des lignes electriques |
FR2678764A1 (fr) * | 1991-07-03 | 1993-01-08 | Ferraz | Indicateur de defaut pour un parafoudre. |
FR2678765A1 (fr) * | 1991-07-04 | 1993-01-08 | Ferraz | Procede de fabrication d'un parafoudre et parafoudre obtenu par mise en óoeuvre de ce procede. |
CH682858A5 (de) * | 1991-12-04 | 1993-11-30 | Asea Brown Boveri | Ueberspannungsableiter. |
DE19650579A1 (de) * | 1996-12-06 | 1998-06-10 | Asea Brown Boveri | Überspannungsableiter |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4404614A (en) * | 1981-05-15 | 1983-09-13 | Electric Power Research Institute, Inc. | Surge arrester having a non-fragmenting outer housing |
DE3426054A1 (de) * | 1984-06-01 | 1985-12-12 | BBC Aktiengesellschaft Brown, Boveri & Cie., Baden, Aargau | Ueberspannungsableiter |
DE3544141A1 (de) * | 1984-12-14 | 1986-06-26 | Hubbell Inc Harvey | Umwickelte elektrische anordnungen und verfahren zum herstellen solcher |
CH659909A5 (en) * | 1982-11-09 | 1987-02-27 | Bbc Brown Boveri & Cie | Method for producing an overvoltage suppressor |
EP0233022A2 (de) * | 1986-01-29 | 1987-08-19 | Bowthorpe Industries Limited | Elektrischer Überspannungsableiter/-ablenker |
FR2641423A1 (fr) * | 1988-12-30 | 1990-07-06 | Ferraz | Dispositif parafoudre pour la protection des lignes electriques |
-
1988
- 1988-12-30 FR FR8817618A patent/FR2641423B1/fr not_active Expired - Lifetime
-
1990
- 1990-02-20 AT AT9090420085T patent/ATE105102T1/de not_active IP Right Cessation
- 1990-02-20 EP EP90420085A patent/EP0443286B1/de not_active Expired - Lifetime
- 1990-02-20 ES ES90420085T patent/ES2051491T3/es not_active Expired - Lifetime
- 1990-02-20 DK DK90420085.4T patent/DK0443286T3/da active
- 1990-02-20 DE DE69008510T patent/DE69008510T2/de not_active Expired - Fee Related
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4404614A (en) * | 1981-05-15 | 1983-09-13 | Electric Power Research Institute, Inc. | Surge arrester having a non-fragmenting outer housing |
CH659909A5 (en) * | 1982-11-09 | 1987-02-27 | Bbc Brown Boveri & Cie | Method for producing an overvoltage suppressor |
DE3426054A1 (de) * | 1984-06-01 | 1985-12-12 | BBC Aktiengesellschaft Brown, Boveri & Cie., Baden, Aargau | Ueberspannungsableiter |
DE3544141A1 (de) * | 1984-12-14 | 1986-06-26 | Hubbell Inc Harvey | Umwickelte elektrische anordnungen und verfahren zum herstellen solcher |
EP0233022A2 (de) * | 1986-01-29 | 1987-08-19 | Bowthorpe Industries Limited | Elektrischer Überspannungsableiter/-ablenker |
FR2641423A1 (fr) * | 1988-12-30 | 1990-07-06 | Ferraz | Dispositif parafoudre pour la protection des lignes electriques |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2685532A1 (fr) * | 1991-12-20 | 1993-06-25 | Soule Sa | Parafoudre a proprietes mecaniques perfectionnees. |
FR2685533A1 (fr) * | 1991-12-20 | 1993-06-25 | Soule Sa | Parafoudre comprenant une piece de contact perfectionnee. |
EP0549432A1 (de) * | 1991-12-20 | 1993-06-30 | Soule Materiel Electrique | Blitzableiter mit mechanisch verbesserten Eigenschaften |
WO1993026017A1 (en) * | 1992-06-18 | 1993-12-23 | Raychem Corporation | Electrical surge arrester |
US5363266A (en) * | 1992-06-18 | 1994-11-08 | Raychem Corporation | Electrical surge arrester |
FR2747500A1 (fr) * | 1996-04-12 | 1997-10-17 | Soule Materiel Electr | Parafoudre perfectionne a base de varistances |
WO1997039462A1 (fr) * | 1996-04-12 | 1997-10-23 | Soule Materiel Electrique | Parafoudre perfectionne a base de varistances |
US6185813B1 (en) | 1996-04-12 | 2001-02-13 | Soule Materiel Electrique | Enhanced varistor-based lighting arresters |
Also Published As
Publication number | Publication date |
---|---|
DK0443286T3 (da) | 1994-05-30 |
ATE105102T1 (de) | 1994-05-15 |
ES2051491T3 (es) | 1994-06-16 |
FR2641423A1 (fr) | 1990-07-06 |
DE69008510D1 (de) | 1994-06-01 |
FR2641423B1 (fr) | 1991-05-24 |
EP0443286B1 (de) | 1994-04-27 |
DE69008510T2 (de) | 1994-08-18 |
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