EP0006392A1 - Insulating casing of moulded resin for electric apparatus - Google Patents

Insulating casing of moulded resin for electric apparatus Download PDF

Info

Publication number
EP0006392A1
EP0006392A1 EP79420026A EP79420026A EP0006392A1 EP 0006392 A1 EP0006392 A1 EP 0006392A1 EP 79420026 A EP79420026 A EP 79420026A EP 79420026 A EP79420026 A EP 79420026A EP 0006392 A1 EP0006392 A1 EP 0006392A1
Authority
EP
European Patent Office
Prior art keywords
envelope
net
insulating
pocket
thermoplastic material
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
Application number
EP79420026A
Other languages
German (de)
French (fr)
Other versions
EP0006392B1 (en
Inventor
Maxime Danchin
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Merlin Gerin SA
Original Assignee
Merlin Gerin SA
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=9209605&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0006392(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Merlin Gerin SA filed Critical Merlin Gerin SA
Publication of EP0006392A1 publication Critical patent/EP0006392A1/en
Application granted granted Critical
Publication of EP0006392B1 publication Critical patent/EP0006392B1/en
Expired legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/02—Details

Definitions

  • the invention relates to an insulating casing of cast resin for electrical equipment, delimiting a sealed internal space for housing the active elements of said equipment and filled with a gas under pressure.
  • the object of the invention is to remedy these drawbacks and to allow the production of an insulating casing of cast resin which does not present any risk of splintering during bursting.
  • the envelope according to the invention is characterized in that a protective pocket, in the form of a net embedded in the wall of the envelope, surrounds said space and is made of an insulating material of characteristics allowing a deformation of said pocket without rupture during an accidental bursting of the envelope, so as to retain the fragments without preventing the escape of the compressed gas.
  • the elastic or stretchable net resists explosion and retains the fragments of the envelope while letting the gas escape towards the outside. Any risk of accident is thus avoided.
  • the elasticity or the deformation of the net can result from the geometric structure of the net or of the constituent material which can be a thermoplastic material such as polyethylene, polyvinyl chloride, polyamide.
  • the insulating mesh embedded in the envelope does not affect dielectric and sealing qualities of the envelope if care is taken to avoid any bridge, consisting of a mesh extending between the internal wall and the external wall of the envelope. The net contributes to the mechanical resistance of the envelope.
  • the net may or may not be woven and have larger or smaller meshes, for example a fraction of a millimeter or several millimeters.
  • the net is placed in the mold before casting, so as to be completely coated during casting by the resin, which penetrates into the meshes without altering the mechanical or physical characteristics of the net.
  • the resin may, depending on the applications, be an epoxy, polyester, polyurethane, polymethacrylate or the like resin.
  • FIG. 1 The figures represent an envelope of a blade of a self-blowing circuit breaker described in French patent No. 2,346,841 of the applicant, and the invention is described below as being applied to such a circuit breaker- tor, but it is understood that it is applicable to any other type of cut-off device, transformer or condenser with a sealed envelope containing an insulating gas under pressure.
  • a sealed space 10 of a pole of an electric circuit breaker is confined by a casing 12 made of two elements, in this case a tubular piece 14 molded in one piece of synthetic material, and a cover 16 for closing the bottom. open from part 14, said cover 16 being factory sealed.
  • the internal space 10 is filled with an electronegative insulating gas with high dielectric strength, in particular sulfur hexafluoride under pressure, and contains the mechanism and the active elements for extinguishing the arc (not shown).
  • Metallic inserts 18, 20 are embedded in the wall of the envelope 12 and constitute through conductors forming the inlet and the outlet of the blade housed in the space 10.
  • the material of the enclosure 12 is a cast resin ( epoxy, polyester, polyurethane, polymethacrylate, etc.) and an orifice 22 for the passage of a rotary control shaft (not shown) is provided in the upper part of the casing 12.
  • a protective pocket 24 is incorporated into the wall of the envelope 12 and completely surrounds the space 10.
  • the pocket 24 is woven using a thread of insulating thermoplastic material, stretchable at temperature ambient, to form a retention net during an accidental bursting of the envelope 12.
  • the retention effect is obtained by the elongation of the thermoplastic thread composing the net, and the diameter of the texture thread is chosen between 0, 1 and 2 mm depending on the configuration of the enclosure and the internal gas pressure.
  • the net is housed in the mold before the resin is poured and is provided with holes for the passage of the bearing of the shaft and the inserts 18. 20.
  • the net 24 can be woven or non-woven, the thermoplastic being for example polyethylene, polyvinyl chloride, polyamide or poly linear ester.
  • the width of the meshes can be a few tenths of a millimeter or a few millimeters.
  • the protective pocket ensures the retention of the fragments of the exploded envelope without opposing the escape of the gas.

Landscapes

  • Gas-Insulated Switchgears (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
  • Insulators (AREA)
  • Housings And Mounting Of Transformers (AREA)
  • Fuses (AREA)
  • Arc-Extinguishing Devices That Are Switches (AREA)

Abstract

Enveloppe (12) en résine coulée pour appareillage électrique, délimitant un espace (10) interne étanche rempli de gaz sous pression. Un filet (24) de protection est noyé dans la paroi de l'enveloppe (12), et est constitué par un matériau thermoplastique étirable à la température ambiante lors d'un éclatement accidentel de l'enveloppe (12), de manière à assurer la rétention des fragments de l'enveloppe éclatée par allongement du fil composant ledit filet.Casing (12) in cast resin for electrical equipment, delimiting a sealed internal space (10) filled with gas under pressure. A protective net (24) is embedded in the wall of the envelope (12), and is constituted by a thermoplastic material stretchable at room temperature during an accidental bursting of the envelope (12), so as to ensure the retention of the fragments of the burst envelope by elongation of the wire composing said net.

Description

L'invention est relative à une enveloppe isolante en résine coulée pour appareillage électrique, délimitant un espace interne étanche de logement des éléments actifs dudit appareillage et rempli d'un gaz sous pression.The invention relates to an insulating casing of cast resin for electrical equipment, delimiting a sealed internal space for housing the active elements of said equipment and filled with a gas under pressure.

Les enveloppes connues du genre mentionné sont disposées derrière des grillages ou parois de protection destinés à retenir les fragments de l'enveloppe lors d'un éclatement accidentel. Ces grillages n'assurent qu'une protection partielle et ils sont encombrants.Known envelopes of the kind mentioned are arranged behind gratings or protective walls intended to retain the fragments of the envelope during an accidental bursting. These screens provide only partial protection and they are bulky.

L'invention a pour but de remédier à ces inconvénients et de permettre la réalisation d'une enveloppe isolante en résine coulée ne présentant aucun risque de dispersion d'éclats lors d'un éclatement.The object of the invention is to remedy these drawbacks and to allow the production of an insulating casing of cast resin which does not present any risk of splintering during bursting.

L'enveloppe selon l'invention est caractérisée par le fait qu'une poche de protection, en forme de filet noyé dans la paroi de l'enveloppe, entoure ledit espace et est réalisée en un matériau isolant de caractéristiques permettant une déformation de ladite poche sans rupture lors d'un éclatement accidentel de l'enveloppe, de manière à retenir les éclats sans empêcher l'échappement du gaz comprimé.The envelope according to the invention is characterized in that a protective pocket, in the form of a net embedded in the wall of the envelope, surrounds said space and is made of an insulating material of characteristics allowing a deformation of said pocket without rupture during an accidental bursting of the envelope, so as to retain the fragments without preventing the escape of the compressed gas.

Le filet élastique ou étirable résiste à l'explosion et il retient les fragments de l'enveloppe tout en laissant échapper le gaz vers l'extérieur. Tout risque d'accident est ainsi évité. L'élasticité ou la déformation du filet peut résulter de la structure géométrique du filet ou du matériau constitutif qui peut être un matériau thermoplastique tel que le polyéthylène, le polychlorure de vinyle, le polyamide.The elastic or stretchable net resists explosion and retains the fragments of the envelope while letting the gas escape towards the outside. Any risk of accident is thus avoided. The elasticity or the deformation of the net can result from the geometric structure of the net or of the constituent material which can be a thermoplastic material such as polyethylene, polyvinyl chloride, polyamide.

Le filet isolant noyé dans l'enveloppe n'affecte pas les qualités diélectriques et d'étanchéité de l'enveloppe si l'on prend soin d'éviter tout pont, constitué par une maille s'étendant entre la paroi interne et la paroi externe de l'enveloppe. Le filet contribue à la résistance mécanique de l'enveloppe.The insulating mesh embedded in the envelope does not affect dielectric and sealing qualities of the envelope if care is taken to avoid any bridge, consisting of a mesh extending between the internal wall and the external wall of the envelope. The net contributes to the mechanical resistance of the envelope.

Le filet peut être tissé ou non et présenter des mailles plus ou moins grandes, par exemple d'une fraction de millimètres ou de plusieurs millimètres. Le filet est mis en place dans le moule avant la coulée, de manière à être entièrement enrobé lors de la coulée par la résine, qui pénètre dans les mailles sans altérer les caractéritiques mécaniques ou physiques du filet. La résine peut selon les applications être une résine époxyde, polyest er, polyuréthane, polyméthacrylate ou analogue.The net may or may not be woven and have larger or smaller meshes, for example a fraction of a millimeter or several millimeters. The net is placed in the mold before casting, so as to be completely coated during casting by the resin, which penetrates into the meshes without altering the mechanical or physical characteristics of the net. The resin may, depending on the applications, be an epoxy, polyester, polyurethane, polymethacrylate or the like resin.

D'autres avantages et caractéristiques ressortiront plus clairement de l'exposé qui va suivre d'un mode de mise en oeuvre de l'invention, donné à titre d'exemple non limitatif et représenté au dessin annexé, dans lequel :

  • la figure 1 est une coupe axiale selon la ligne I-I de la fig. 2 d'une enveloppe isolante de disjoncteur selon l'invention;
  • la figure 2 est une vue de profil de la fig. 1;
  • la figure 3 est une coupe suivant la ligne III-III de la fig. 1;
  • la figure 4 est une vue partielle à échelle agrandie du filet selon la fig. 1.
Other advantages and characteristics will emerge more clearly from the description which follows of an embodiment of the invention, given by way of nonlimiting example and represented in the appended drawing, in which:
  • Figure 1 is an axial section along line II of FIG. 2 of a circuit breaker insulating jacket according to the invention;
  • FIG. 2 is a side view of FIG. 1;
  • Figure 3 is a section along line III-III of FIG. 1;
  • FIG. 4 is a partial view on an enlarged scale of the net according to FIG. 1.

Les figures représentent une enveloppe d'un pale d'un disjoncteur à autosoufflage décrit dans le brevet français N° 2.346.841 de la demanderesse, et l'invention est décrite par la suite comme étant appliquée à un tel disjone- teur, mais il est bien entendu qu'elle est applicable à tout autre type d'appareil de coupure, de transformateur ou de condensateur à enveloppe étanche contenant un gaz isolant sous pression. Sur les figures, un espace 10 étanche d'un pθle d'un disjoncteur électrique est confiné par une enveloppe 12 en deux éléments, en l'occurrence une pièce 14 tubulaire moulée monobloc en matière synthétique, et un couvercle 16 d'obturation du fond ouvert de la pièce 14, ledit couvercle 16 étant scellé en usine. L'espace interne 10 est rempli d'un gaz isolant électronégatif à haute rigidité diélectrique, notamment de l'hexafluorure de soufre sous pression, et renferme le mécanisme et les éléments actifs d'extinction de l'arc (non représentés). Des inserts métalliques 18, 20 sont noyés dans la paroi de l'enveloppe 12 et constituent des conducteurs de traversée formant l'entrée et la sortie du pale logé dans l'espace 10. Le matériau de l'enveloppe 12 est une résine coulée (époxyde, polyester, polyuréthane, polyméthacrylate, etc...) et un orifice 22 de passage d'un arbre de commande rotatif (non représenté) est ménagé dans la partie supérieure de l'enveloppe 12.The figures represent an envelope of a blade of a self-blowing circuit breaker described in French patent No. 2,346,841 of the applicant, and the invention is described below as being applied to such a circuit breaker- tor, but it is understood that it is applicable to any other type of cut-off device, transformer or condenser with a sealed envelope containing an insulating gas under pressure. In the figures, a sealed space 10 of a pole of an electric circuit breaker is confined by a casing 12 made of two elements, in this case a tubular piece 14 molded in one piece of synthetic material, and a cover 16 for closing the bottom. open from part 14, said cover 16 being factory sealed. The internal space 10 is filled with an electronegative insulating gas with high dielectric strength, in particular sulfur hexafluoride under pressure, and contains the mechanism and the active elements for extinguishing the arc (not shown). Metallic inserts 18, 20 are embedded in the wall of the envelope 12 and constitute through conductors forming the inlet and the outlet of the blade housed in the space 10. The material of the enclosure 12 is a cast resin ( epoxy, polyester, polyurethane, polymethacrylate, etc.) and an orifice 22 for the passage of a rotary control shaft (not shown) is provided in the upper part of the casing 12.

Selon l'invention, une poche de protection 24 est incorporée dans la paroi de l'enveloppe 12 et entoure complètement l'espace 10. La poche 24 est tissée à l'aide d'un fil en matière thermoplastique isolante, étirable à la température ambiante, pour Pormer un filet de rétention lors d'un éclatement accidentel de l'enveloppe 12. L'effet de rétention est obtenu par l'allongement du fil thermoplastique composant le filet, et le diamètre du fil de texture est choisi entre 0,1 et 2 mm selon la configuration de l'enveloppe et la pression interne du gaz. Le filet est logé dans le moule avant la coulée de la résine et est muni de trous pour le passage du palier de l'arbre et des inserts 18. 20. Le filet 24 peut être tissé ou non tissé, la matière thermoplastique étant par exemple du polyéthylène, du polychlorure de vinyle, un polyamide ou un polyester linéaire. La largeur des mailles peut être de quelques dizièmes de millimètres ou de quelques millimètres.According to the invention, a protective pocket 24 is incorporated into the wall of the envelope 12 and completely surrounds the space 10. The pocket 24 is woven using a thread of insulating thermoplastic material, stretchable at temperature ambient, to form a retention net during an accidental bursting of the envelope 12. The retention effect is obtained by the elongation of the thermoplastic thread composing the net, and the diameter of the texture thread is chosen between 0, 1 and 2 mm depending on the configuration of the enclosure and the internal gas pressure. The net is housed in the mold before the resin is poured and is provided with holes for the passage of the bearing of the shaft and the inserts 18. 20. The net 24 can be woven or non-woven, the thermoplastic being for example polyethylene, polyvinyl chloride, polyamide or poly linear ester. The width of the meshes can be a few tenths of a millimeter or a few millimeters.

Lors d'un éclatement accidentel de l'enveloppe 12, la poche de protection assure la rétention des fragments de l'enveloppe éclatée sans s'opposer à l'échappement du gaz.During an accidental bursting of the envelope 12, the protective pocket ensures the retention of the fragments of the exploded envelope without opposing the escape of the gas.

Il est clair qu'un filet de protection additionnel peut être incorporé dans le couvercle 16 d'obturation de l'enveloppe 12, et que ces filets ne peuvent suppléer aux protections conventionnelles des appareils en service, notamment aux cellules seules capables de retenir les éclats lors d'une violente explosion due à une surpression interne excessive.It is clear that an additional protective net can be incorporated in the cover 16 for closing the envelope 12, and that these nets cannot replace the conventional protections of the apparatuses in service, in particular to the cells alone capable of retaining the fragments. during a violent explosion due to excessive internal pressure.

Claims (4)

1. Enveloppe isolante (12) en résine coulée pour appareillage électrique, délimitant un espace Interne (10) étanche de logement des éléments actifs dudit appareillage et rempli d'un gaz sous pression, caractérisée par le fait qu'une poche de protection (24) en forme de filet noyé dans la paroi de l'enveloppe (12), entoure ledit espace (10) et est réalisée en un matériau isolant de caractéristiques permettant une déformation de ladite poche sans rupture lors d'un éclatement accidentel de l'enveloppe, de manière à retenir les éclats sans empêcher l'échappement du gaz comprimé.1. Insulating casing (12) of cast resin for electrical equipment, delimiting a sealed internal space (10) for housing the active elements of said equipment and filled with gas under pressure, characterized in that a protective pocket (24 ) in the form of a net embedded in the wall of the envelope (12), surrounds said space (10) and is made of an insulating material of characteristics allowing a deformation of said pocket without breaking during an accidental bursting of the envelope , so as to retain the fragments without preventing the escape of the compressed gas. 2. Enveloppe isolante selon 1, caractérisée par le fait que la poche de protection (24) est constituée en un matériau thermoplastique étirable.2. Insulating jacket according to 1, characterized in that the protective pocket (24) is made of a stretchable thermoplastic material. 3. Enveloppe isolante selon 2, caractérisée par le fait que ledit matériau thermoplastique appartient à la famille des polyoléfines, des polyvinyles, des polyamides ou des polyester linéaires.3. Insulating jacket according to 2, characterized in that said thermoplastic material belongs to the family of polyolefins, polyvinyls, polyamides or linear polyester. 4. Enveloppe isolante selon 1, 2 ou 3, caractérisée par le fait que ledit filet est un tissu élastique à mailles tissées ou non tissées.4. Insulating envelope according to 1, 2 or 3, characterized in that the said net is an elastic fabric with woven or non-woven meshes.
EP79420026A 1978-06-12 1979-05-31 Insulating casing of moulded resin for electric apparatus Expired EP0006392B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR7818032 1978-06-12
FR7818032A FR2428905A1 (en) 1978-06-12 1978-06-12 INSULATING ENCLOSURE WITH INCORPORATED PROTECTION NET FOR ELECTRICAL EQUIPMENT WITH GAS INSULATION

Publications (2)

Publication Number Publication Date
EP0006392A1 true EP0006392A1 (en) 1980-01-09
EP0006392B1 EP0006392B1 (en) 1981-11-04

Family

ID=9209605

Family Applications (1)

Application Number Title Priority Date Filing Date
EP79420026A Expired EP0006392B1 (en) 1978-06-12 1979-05-31 Insulating casing of moulded resin for electric apparatus

Country Status (7)

Country Link
US (1) US4271343A (en)
EP (1) EP0006392B1 (en)
JP (2) JPS5517296A (en)
DE (1) DE2961220D1 (en)
DK (1) DK154375C (en)
FR (1) FR2428905A1 (en)
YU (1) YU40734B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1947669A1 (en) * 2007-01-17 2008-07-23 Abb Research Ltd. Pole for a gas insulated high voltage switch and method for producing such a switch pole

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4401841A (en) * 1981-01-23 1983-08-30 Meyer Jeffry R Explosion resistant insulator and method of making same
US4499039A (en) * 1981-12-29 1985-02-12 Berg Arthur H Method for making plastic article with fibrous reinforcement
US4772230A (en) * 1981-12-29 1988-09-20 Cooper Industries, Inc. Plastic plugs and receptacles reinforced with cured resin coated glass cloth
US4419651A (en) * 1982-06-24 1983-12-06 General Electric Company High voltage current limiting fuse having a fuse element susceptible to oxidation and especially suited for high operating temperatures
JP2506724Y2 (en) * 1991-06-04 1996-08-14 日新電機株式会社 Gas equipment container
US5410446A (en) * 1993-09-10 1995-04-25 Cooper Industries, Inc. Circuit breaker explosion stress absorber
FR2975814B1 (en) * 2011-05-27 2014-02-21 Maclean Power France METHOD FOR MANUFACTURING HOLLOW BODIES FOR COMPOSITE ELECTRIC INSULATORS AND HOLLOW BODIES OBTAINED WITH SUCH A METHOD

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE668232C (en) * 1930-08-30 1938-11-29 Frida Strauss Geb Ruppel Insulating body for pressurized gas switch
CH357781A (en) * 1958-05-30 1961-10-31 Bbc Brown Boveri & Cie Isolator for switching chambers
FR1351712A (en) * 1962-02-22 1964-02-07 Licentia Gmbh Electrically insulated housing, especially high voltage switch cabinet
DE1440184A1 (en) * 1961-08-03 1969-02-20 Sachsenwerk Licht & Kraft Ag Process for the production of a pole piece for electrical circuit breakers
DE2058148A1 (en) * 1970-11-26 1972-05-31 Felten & Guilleaume Kabelwerk Composite polyolefin elastomeric tubes - for insulating heavy current
CH538186A (en) * 1972-09-21 1973-06-15 Sprecher & Schuh Ag Process for the production of a molded, electrically insulating, hardenable plastic housing for high-voltage circuit breakers and a housing produced by the process
US3979709A (en) * 1975-05-22 1976-09-07 The Chase-Shawmut Company Electric fuse having a multiply casing of a synthetic - resin glass-cloth laminate

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2801768A (en) * 1954-12-20 1957-08-06 Westinghouse Electric Corp Explosion-proof enclosure
GB1584955A (en) * 1976-07-28 1981-02-18 Explosafe Sa Explosionsuppressive filler masses
GB1564550A (en) * 1976-12-14 1980-04-10 Jowitt P Fire protection means for fuel tanks

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE668232C (en) * 1930-08-30 1938-11-29 Frida Strauss Geb Ruppel Insulating body for pressurized gas switch
CH357781A (en) * 1958-05-30 1961-10-31 Bbc Brown Boveri & Cie Isolator for switching chambers
DE1440184A1 (en) * 1961-08-03 1969-02-20 Sachsenwerk Licht & Kraft Ag Process for the production of a pole piece for electrical circuit breakers
FR1351712A (en) * 1962-02-22 1964-02-07 Licentia Gmbh Electrically insulated housing, especially high voltage switch cabinet
DE2058148A1 (en) * 1970-11-26 1972-05-31 Felten & Guilleaume Kabelwerk Composite polyolefin elastomeric tubes - for insulating heavy current
CH538186A (en) * 1972-09-21 1973-06-15 Sprecher & Schuh Ag Process for the production of a molded, electrically insulating, hardenable plastic housing for high-voltage circuit breakers and a housing produced by the process
US3979709A (en) * 1975-05-22 1976-09-07 The Chase-Shawmut Company Electric fuse having a multiply casing of a synthetic - resin glass-cloth laminate
US3979709B1 (en) * 1975-05-22 1987-10-13

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1947669A1 (en) * 2007-01-17 2008-07-23 Abb Research Ltd. Pole for a gas insulated high voltage switch and method for producing such a switch pole
WO2008087060A1 (en) * 2007-01-17 2008-07-24 Abb Research Ltd Pole for a gas-insulated high-voltage switch and method for producing a switch pole of this type

Also Published As

Publication number Publication date
DK154375B (en) 1988-11-07
DE2961220D1 (en) 1982-01-14
JPS6036973Y2 (en) 1985-11-02
JPS5517296A (en) 1980-02-06
FR2428905A1 (en) 1980-01-11
EP0006392B1 (en) 1981-11-04
FR2428905B1 (en) 1980-10-24
DK154375C (en) 1989-04-10
YU26979A (en) 1982-06-30
US4271343A (en) 1981-06-02
JPS6048307U (en) 1985-04-05
DK239879A (en) 1979-12-13
YU40734B (en) 1986-04-30

Similar Documents

Publication Publication Date Title
EP0006392B1 (en) Insulating casing of moulded resin for electric apparatus
US3723930A (en) Oil immersible current limiting fuse assembly
US3018406A (en) Lightning arrester
EP0244281B1 (en) Self-protected low-voltage capacitor
KR101017995B1 (en) Repeatable fuse
DE2947016C2 (en) Gas-tight galvanic cell with overpressure protection
CA1263162A (en) Electrical device casing, namely a lightning arrester, incorporating a moulded insulating enveloppe
CA1299623C (en) Insulated electrical heating element equipped with a safety device for detecting faults in the electrical insulation
WO2004109720A1 (en) High pressure resistance body element
KR200487300Y1 (en) Portable overload tester
US4058785A (en) Current limiting fuse
JPH04249816A (en) Lightening insulator
FR2891955A1 (en) Electrical energy distribution panel e.g. high voltage distribution panel, has partition cross-piece device having electric connection point arranged in non-sealing lower enclosure and case situated around point and delimiting cavity
EP0356348B1 (en) Self-protected low-voltage capacitor
CN110383400A (en) Surge arrester and manufacturing method for manufacturing surge arrester
CN208507617U (en) Manual maintenance switch
EP0851549B1 (en) Surge arrester having a housing made from thermoplastic material with an external wafer form surface
PT920705E (en) CHARGE INTERRUPTION SWITCH
AU2005223259B2 (en) Station class surge arrester
EP0393182A1 (en) Device for protecting electric power resistances and anti-overpressure system.
EP0023543A2 (en) Explosionproof electrical capacitor with safety cut-out device
CN2490745Y (en) Disassembly sealing anti-explosion wire connection box
JP3175244B2 (en) Transmission line lightning arrester
US4320377A (en) Arc gas control device for a power class fuse having load break contacts
SU947917A1 (en) Overvoltage limiting device

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

Designated state(s): BE CH DE GB IT NL SE

17P Request for examination filed
ITF It: translation for a ep patent filed
GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Designated state(s): BE CH DE GB IT NL SE

REF Corresponds to:

Ref document number: 2961220

Country of ref document: DE

Date of ref document: 19820114

PLBI Opposition filed

Free format text: ORIGINAL CODE: 0009260

26 Opposition filed

Opponent name: SPRECHER & SCHUH AG

Effective date: 19820714

PLBN Opposition rejected

Free format text: ORIGINAL CODE: 0009273

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: OPPOSITION REJECTED

27O Opposition rejected

Effective date: 19831028

ITTA It: last paid annual fee
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 19940531

Year of fee payment: 16

EAL Se: european patent in force in sweden

Ref document number: 79420026.1

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 19950517

Year of fee payment: 17

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 19950522

Year of fee payment: 17

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 19950524

Year of fee payment: 17

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19950526

Year of fee payment: 17

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: BE

Payment date: 19950712

Year of fee payment: 17

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Effective date: 19951201

NLV4 Nl: lapsed or anulled due to non-payment of the annual fee

Effective date: 19951201

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Effective date: 19960531

Ref country code: CH

Effective date: 19960531

Ref country code: BE

Effective date: 19960531

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Effective date: 19960601

BERE Be: lapsed

Owner name: MERLIN GERIN

Effective date: 19960531

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 19960531

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Effective date: 19970201

EUG Se: european patent has lapsed

Ref document number: 79420026.1