EP0845843A1 - Dispositif de protection pour lignes téléphoniques - Google Patents
Dispositif de protection pour lignes téléphoniques Download PDFInfo
- Publication number
- EP0845843A1 EP0845843A1 EP97402862A EP97402862A EP0845843A1 EP 0845843 A1 EP0845843 A1 EP 0845843A1 EP 97402862 A EP97402862 A EP 97402862A EP 97402862 A EP97402862 A EP 97402862A EP 0845843 A1 EP0845843 A1 EP 0845843A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- blade
- elastic
- fact
- membrane
- elastic blade
- 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
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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
-
- 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
- H01T1/12—Means structurally associated with spark gap for recording operation thereof
Definitions
- the present invention relates to the field of devices for protection of telephone lines.
- Surge arresters for telephone lines are generally made from three-pole gas spark gaps to allow protection of the two line wires relative to the earth. Most of the time, these components end up short-circuiting report the unavailability of the line on the one hand, and ensure the protection of the terminal on the other hand. This end of life is ensured by an external device on the spark gap.
- the short-circuiting devices used on the commercial surge arresters generally consist of devices thermal which, from a determined temperature, remove the insulation between two of the spark gap electrodes.
- FIG. 1 there is shown under reference 10 a spark gap conventional gas pipe with three output electrodes 11, 12, 13, and 20 a leaf spring of electrically conductive material connected in permanence at the central electrode 12, but isolated at the origin of the electrodes 11, 13 terminated by respective washers 21, 22 made of material electrically insulating. Heating of the device at the end of its life causes the fusion of the washers 21, 22 of insulation and consequently the contact of the blade 20 with the electrodes 11, 13 to ensure the complete short circuit of the device between the three electrodes 11, 12 and 13.
- the known device illustrated in FIG. 1 gives overall satisfaction with the protection of telephone lines. However, it has a major drawback: it does not allow the formal visualization of the fault.
- line protection devices telephone calls can be found for example in documents: FR-2409616, FR-2466854, FR-2560457, FR-2560458, FR-2659504, FR-2696581, FR-2710793 and FR-2692738.
- the present invention now aims to meet the aforementioned problems by proposing a new surge arrester device protection of telephone lines with an end-of-life indicator.
- An important goal is in particular to propose such an adapted device to support the normative tests in force.
- a protection device for telephone lines comprising a lightning arrester, an elastic blade kept under stress and a fusible membrane suitable for retaining said elastic blade under stress and release it when the surge arrester reaches a temperature determined.
- the membrane fuse works under tension to keep the elastic blade under constraint.
- the blade elastic is made of electrically conductive material and is suitable to view the end of life of the device.
- the device according to the present invention according to which the means for retaining under stress the elastic blade is formed of a calibrated fuse membrane, allows the two aforementioned tests to be held. This results in particular from the fact that the dimensioning of the membrane fuse allows to play on the two parameters temperature and time.
- a protective device comprising a housing or cradle 30 which houses a protection cell 10 and supports an elastic blade 40 thus a fusible membrane 50, as indicated previously.
- the cradle 30 can be the subject of numerous variants of production. It preferably corresponds to a classic geometry (by example of width equal to 17.5 mm) standardized to allow sound combination in cabinets and on conventional rails such as rails DIN.
- the lightning protection cell 10 is preferably also classic in itself. It may for example be a gas spark gap tripolar as previously indicated.
- the elastic blade 50 is preferably made of material electrically driver to participate, in combination with contacts 42, 44 electrically conductive carried by the housing 30, has a visualization distance from end of life of the device.
- the elastic blade 40 is held under stress, at rest by the fuse membrane 50.
- the elastic blade 40 is embedded or fixed by other means, to a first of its ends 41 on the case 30.
- the elastic blade 40 is moreover retained at its second end 43 by the fusible membrane 50.
- the latter is fixed by a first end 51 on the lightning protection cell 50, and by a second end 52 on said second end 43 of the elastic blade 40.
- the stress of the elastic blade 40 exerts a force on the traction on the fuse membrane 50.
- the fusible membrane 50 releases the elastic blade 40.
- the elastic blade 40 then occupies a second position as illustrated in broken lines on Figure 2. In this second position, the elastic blade 40 abuts on the aforementioned contacts 42, 44, previously isolated, which allow ensure the end of electrical life of the arrester.
- the elastic blade 40 can also be associated, by its second end 43 has a display piece 60 mounted at displacement, for example in translation on the housing 30. Such a piece of display 60 is more particularly visible in FIG. 5. It can be the subject of numerous embodiments.
- the display part 60 can be associated with two protection cells 10 placed in parallel and each associated with an elastic blade 40 and a fusible membrane 50 respectively.
- the display part 60 is provided with two stages of training finger, illustrated under the general reference 62 in the figure 5, some rigid, others flexible to elastically cross the end 43 of a blade 40.
- Such an arrangement makes it possible to distinguish the cases where 1) the two cells 10 are in service, 2) one of the two cells 10 is disconnected and 3) the two cells 10 are disconnected.
- the amplitude of movement of the display part 60 depends on the number of cells 10 in service. More specifically, at rest, when the two cells 10 are in service, the ends 43 of the blades 40 take support on the rigid stages of the drive fingers of the part 60 of visualization.
- the end 43 of the corresponding blade 40 moves and drives the part 60 of display on a first amplitude.
- the flexible stage of the other drive finger of the part 60 elastically crosses the end 43 of the blade 40 associated with the second cell 10 so that this end 43 of this blade 40 is placed in abutment against said flexible stage.
- the end 43 of the blade 40 in question moves the part 60 on a second amplitude, by requesting the flexible drive stage placed opposite.
- the display part 60 illustrated in FIG. 5 is broadly in accordance with the provisions described in the patent application FR-94 14586 of 5/12/94.
- this display part 60 is provided with a flap 64 designed to be moved next to a window formed in the housing 60 during the release of the elastic blade 40.
- the device according to the present invention can further include an optical barrier detection system for order a fault display by remote monitoring.
- the elastic blade 40 may include an opaque flap 45 positioned to modify the state of an optical curtain according to whether the blade 40 occupies the original position maintained by the fusible diaphragm 50 or is moved after rupture of the membrane 50.
- the flap 45 is formed by folding a portion of the elastic blade 40 at 90 ° from its plane way.
- the flap 45 can be adapted to release the curtain optical in the original position of the elastic blade 40, but on the contrary obscure it when the membrane 50 releases the elastic blade 40.
- the optical curtain can be defined by a channel 31 formed in the housing 30 or a series of boxes 30 attached, between an optical transmitter and a receiver associated optics.
- the fusible membrane 50 is made of a material thermoplastic.
- the fusible membrane 50 can be made of polycarbonate and have a width of the order of 3 to 5mm and a thickness of the order of 375 to 500 ⁇ m. Its length is for example of around 20mm.
- this membrane 50 illustrated by way of nonlimiting example in FIG. 6 includes an orifice 53 at its first end 51 for engagement on the pin 14, and a oblong light 54 at its second end 52 for engagement on the elastic blade 40. Furthermore, this membrane 50 which has edges longitudinal straight is generally flared towards its second end 52.
- the device according to the present invention with an end-of-life indicator eliminates all power supply for display of end-of-life protection, even if the site's telecommunications equipment is no longer supplied. This represents a very important advantage compared to the devices existing classics that previously required an electrical protection test after finding the faulty telephone line among all the site lines.
- FIG. 3A a first variant according to the present invention comprising a spark gap with three-pole gas 10, the end 51 of the fusible membrane 50 being linked to a pin 14 placed on the central electrode 12.
- the membrane 50 it is indeed preferable to bond the membrane 50 to the electrode central 12 which is the one that heats the most in the event of a failure.
- the end 51 of the membrane 50 could be linked to one of the end electrodes 11 or 13.
- FIG. 3B illustrates another variant of the protection 10 according to the present invention formed by a gas spark gap 10 bipolar, with two electrodes 11, 12, the end 51 of the membrane fuse 50 being linked to a pin 14 placed on one of the electrodes 12.
- membrane should not be understood in a sense limiting. In practice, the invention encompasses any equivalent means based on ribbon or link capable of initially keeping the elastic blade under stress 40.
- the protection device according to the present invention can be completed by a blade 20 in electrically conductive material, conventional, of the type described previously with regard to FIG. 1 to connect the various poles of cell 10 in the event of failure, as shown diagrammatically in the figure 4.
Landscapes
- Fuses (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
Abstract
Description
- la figure 1 précédemment décrite représente un dispositif de protection classique conforme à l'état de la technique,
- la figure 2 représente une vue latérale d'un dispositif de protection conforme à la présente invention,
- les figures 3A et 3B illustrent deux variantes de réalisation de cellules de protection conformes à la présente invention,
- la figure 4 représente schématiquement la visualisation de fin de vie,
- la figure 5 représente schématiquement un dispositif de protection conforme à la présente invention, partiellement éclatée, et
- la figure 6 représente schématiquement une membrane fusible conforme à la présente invention.
- non fonctionnement du dispositif de mise en court-circuit lors de séquences d'application d'une tension secteur alternative 50Hz sous forme d'une répétition, cinq fois de suite d'un courant de 5A pendant une seconde, suivi d'un repos de 3mn (simulant les fermetures/ouvertures des contacts de lignes),
- fonctionnement du dispositif de mise en court-circuit pour une application prolongée accidentelle d'une tension secteur alternative 50Hz avec un courant compris entre 500mA et 10A.
Claims (14)
- Dispositif de protection pour lignes téléphoniques, comprenant une cellule parafoudre (10) caractérisé par le fait qu'il comprend en outre: une lame élastique (40) maintenue sous contrainte et une membrane fusible (50) adaptée pour retenir sous contrainte ladite lame élastique (40) et libérer celle-ci lorsque la cellule parafoudre (10) atteint une température déterminée.
- Dispositif selon la revendication 1, caractérisé par le fait que la membrane fusible (50) travaille à la traction pour maintenir la lame élastique (40) sous contrainte.
- Dispositif seton l'une des revendications 1 ou 2, caractérisé par le fait que la lame élastique (40) est réalisée en matériau électriquement conducteur et est adaptée pour visualiser la fin de vie du dispositif.
- Dispositif selon l'une des revendications 1 à 3, caractérisé par le fait que la membrane fusible (50) est réalisée en un matériau thermoplastique.
- Dispositif selon l'une des revendications 1 à 4, caractérisé par le fait que la membrane fusible (50) est réalisée en polycarbonate.
- Dispositif selon l'une des revendications 1 à 5, caractérisé par le fait que la membrane fusible (50) possède une largeur de l'ordre de 3 à 5mm et une épaisseur de l'ordre de 375 à □ □ □ □m.
- Dispositif selon la revendication 3, caractérisé par le fait que la lame élastique (40) coopère avec des contacts électriques (42, 44) pour la visualisation.
- Dispositif selon l'une des revendications 1 à 7, caractérisé par le fait que la lame élastique (40) coopère avec une pièce de visualisation mobile (60).
- Dispositif selon l'une des revendications 1 à 8, caractérisé par le fait que la cellule de protection (10) est formée d'un éclateur à gaz tripolaire.
- Dispositif selon la revendication 9, caractérisé par le fait que la membrane fusible (50) est placée contre l'électrode centrale (12) de l'éclateur tripolaire (10).
- Dispositif selon l'une des revendications 1 à 8, caractérisé par le fait que la cellule de protection (10) est formée d'un éclateur à gaz bipolaire.
- Dispositif selon l'une des revendications 1 à 11, caractérisé par le fait que la lame élastique (40) possède un volet opaque (45) apte à modifier l'état d'une barrière optique selon la position de ladite lame élastique (40).
- Dispositif selon la revendication 8, caractérisé par le fait qu'il comprend deux cellules de protection (10) placées en parallèle et associées chacune à une lame élastique (40) et une membrane fusible (50) respectives, associées à une pièce de visualisation mobile (60) adaptée pour distinguer les cas où 1) les deux cellules (10) sont en service, 2) l'une des deux cellules (10) est déconnectée et 3) les deux cellules (10) sont déconnectées.
- Dispositif selon la revendication 13, caractérisé par le fait que la pièce (60) de visualisation est munie de deux étages de doigt d'entraínement (62), les uns rigides, les autres flexibles pour franchir élastiquement l'extrémité (43) d'une lame (40).
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9614660A FR2756673B1 (fr) | 1996-11-29 | 1996-11-29 | Dispositif de protection pour lignes telephoniques |
FR9614660 | 1996-11-29 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0845843A1 true EP0845843A1 (fr) | 1998-06-03 |
EP0845843B1 EP0845843B1 (fr) | 2002-10-16 |
Family
ID=9498174
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19970402862 Expired - Lifetime EP0845843B1 (fr) | 1996-11-29 | 1997-11-27 | Dispositif de protection pour lignes téléphoniques |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0845843B1 (fr) |
DE (1) | DE69716387T2 (fr) |
ES (1) | ES2184049T3 (fr) |
FR (1) | FR2756673B1 (fr) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1737091A1 (fr) * | 2005-05-18 | 2006-12-27 | Dehn + Söhne Gmbh + Co Kg | Dérivateur de surtensions, comprenant un élément de base pouvant être monté sur un rail et pourvu de broches de connexion électrique ainsi que d' un module enfichable |
WO2008145460A1 (fr) * | 2007-05-29 | 2008-12-04 | Dehn + Söhne Gmbh + Co. Kg | Dispositif de mise en court-circuit pour coupe-circuits de surtension |
WO2009034081A1 (fr) * | 2007-09-10 | 2009-03-19 | Dehn + Söhne Gmbh + Co. Kg | Dispositif de commutation de limitation des dommages pour des parasurtenseurs tels que des varistances, des parafoudres ou des moyens équivalents |
FR2924278A1 (fr) * | 2007-11-22 | 2009-05-29 | Nexans Sa | Dispositif de protection de lignes telephoniques |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102004006987B3 (de) * | 2004-01-14 | 2005-08-04 | Dehn + Söhne Gmbh + Co. Kg | Anordnung zur Zustandskontrolle und Protokollierung von Überspannungsschutz-Geräten, insbesondere bei deren Einsatz in Niederspannungsnetzen oder der Informationstechnik |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0312729A1 (fr) * | 1987-10-20 | 1989-04-26 | KRONE Aktiengesellschaft | Dispositif de protection thermique pour dérivateur de surtension incorporé dans un magasin de dérivateurs pour lignes téléphoniques |
FR2696588A1 (fr) * | 1992-10-07 | 1994-04-08 | Legrand Sa | Limiteur de surtension à moyen indicateur de mise en défaut. |
FR2727806A1 (fr) * | 1994-12-05 | 1996-06-07 | Soule Sa | Dispositif de protection a l'encontre de surtensions transitoires a base de varistances et deconnecteurs thermiques |
-
1996
- 1996-11-29 FR FR9614660A patent/FR2756673B1/fr not_active Expired - Fee Related
-
1997
- 1997-11-27 DE DE1997616387 patent/DE69716387T2/de not_active Expired - Lifetime
- 1997-11-27 ES ES97402862T patent/ES2184049T3/es not_active Expired - Lifetime
- 1997-11-27 EP EP19970402862 patent/EP0845843B1/fr not_active Expired - Lifetime
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0312729A1 (fr) * | 1987-10-20 | 1989-04-26 | KRONE Aktiengesellschaft | Dispositif de protection thermique pour dérivateur de surtension incorporé dans un magasin de dérivateurs pour lignes téléphoniques |
FR2696588A1 (fr) * | 1992-10-07 | 1994-04-08 | Legrand Sa | Limiteur de surtension à moyen indicateur de mise en défaut. |
FR2727806A1 (fr) * | 1994-12-05 | 1996-06-07 | Soule Sa | Dispositif de protection a l'encontre de surtensions transitoires a base de varistances et deconnecteurs thermiques |
EP0716493A1 (fr) * | 1994-12-05 | 1996-06-12 | Soule Materiel Electrique | Dispositif de protection à l'encontre de surtensions transitoires à base de varistances et déconnecteurs thermiques |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1737091A1 (fr) * | 2005-05-18 | 2006-12-27 | Dehn + Söhne Gmbh + Co Kg | Dérivateur de surtensions, comprenant un élément de base pouvant être monté sur un rail et pourvu de broches de connexion électrique ainsi que d' un module enfichable |
CN1866657B (zh) * | 2005-05-18 | 2012-04-18 | 德恩及索恩两合股份有限公司 | 电涌放电器 |
WO2008145460A1 (fr) * | 2007-05-29 | 2008-12-04 | Dehn + Söhne Gmbh + Co. Kg | Dispositif de mise en court-circuit pour coupe-circuits de surtension |
WO2009034081A1 (fr) * | 2007-09-10 | 2009-03-19 | Dehn + Söhne Gmbh + Co. Kg | Dispositif de commutation de limitation des dommages pour des parasurtenseurs tels que des varistances, des parafoudres ou des moyens équivalents |
CN101836340B (zh) * | 2007-09-10 | 2014-04-02 | 德恩及索恩两合股份有限公司 | 用于过电压放电器的限制损坏的开关设备 |
FR2924278A1 (fr) * | 2007-11-22 | 2009-05-29 | Nexans Sa | Dispositif de protection de lignes telephoniques |
Also Published As
Publication number | Publication date |
---|---|
FR2756673A1 (fr) | 1998-06-05 |
DE69716387T2 (de) | 2003-07-10 |
ES2184049T3 (es) | 2003-04-01 |
FR2756673B1 (fr) | 2003-05-30 |
DE69716387D1 (de) | 2002-11-21 |
EP0845843B1 (fr) | 2002-10-16 |
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