EP1170766A1 - Actuating rod for a high tension circuit breaker - Google Patents

Actuating rod for a high tension circuit breaker Download PDF

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Publication number
EP1170766A1
EP1170766A1 EP01401459A EP01401459A EP1170766A1 EP 1170766 A1 EP1170766 A1 EP 1170766A1 EP 01401459 A EP01401459 A EP 01401459A EP 01401459 A EP01401459 A EP 01401459A EP 1170766 A1 EP1170766 A1 EP 1170766A1
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EP
European Patent Office
Prior art keywords
dielectric
operating rod
section
gas
circuit breaker
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
EP01401459A
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German (de)
French (fr)
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EP1170766B1 (en
Inventor
Maurice Mahl
Jean-Marc Willieme
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.)
Grid Solutions SAS
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Alstom SA
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Filing date
Publication date
Application filed by Alstom SA filed Critical Alstom SA
Publication of EP1170766A1 publication Critical patent/EP1170766A1/en
Application granted granted Critical
Publication of EP1170766B1 publication Critical patent/EP1170766B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • 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
    • H01H33/42—Driving mechanisms
    • 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
    • H01H33/42—Driving mechanisms
    • H01H2033/426—Details concerning the connection of the isolating driving rod to a metallic part

Definitions

  • the invention relates to high voltage circuit breakers or other devices. electric cut-off with dielectric gas insulation, and more particularly the operating rod of the movable contact of a circuit breaker power plant which is interposed between the moving contact and the circuit breaker control.
  • the operating rod of a movable contact of high voltage circuit breaker generally includes a full or hollow cylindrical section in electrically insulating material, for example glass fiber reinforced with resin, and two metal frames fixed respectively to the ends of the insulating section and which are intended one to be connected to the movable contact of the circuit breaker and the other to be connected to the control mechanism.
  • the metal frame of the connecting rod which is intended to be connected to the moving contact of the circuit breaker is generally designed in shape deflector to protect the insulating section of the connecting rod from electric arcs which are created between the two contacts of the circuit breaker during opening operations.
  • This deflector also serves to protect the insulating section from hot gases which are evacuated behind the movable contact.
  • the section rod insulator undergoes very significant thermal attack (burns) may cause an unacceptable decrease in its dielectric strength.
  • the object of the invention is to provide another form of protection for a such an insulating rod simple to implement and which does not have the disadvantages noted above.
  • the invention relates to an operating rod for an apparatus high voltage electric cut-off with dielectric gas insulation, comprising a section of electrically insulating material and two reinforcements of metal fixed respectively to the ends of the section, characterized in that that a heat shield made of electrically insulating material is placed between the metal reinforcements and surrounds the insulating section from a distance to define with the latter an annular free space intended to be filled with dielectric gas.
  • the shield can be made of PTFE, ceramic or other material insulating and resistant to attack by an electric arc.
  • the invention extends to an SF6-insulated circuit breaker equipped with a operating rod according to the invention.
  • the annular space defined by the shield can be filled with dielectric breaker insulation gas or other gas dielectric if this annular space is completely closed.
  • Figure 1 schematically illustrates a circuit breaker with a connecting rod of operation according to the invention.
  • Figure 2 shows very schematically in axial half-section a exemplary embodiment of a connecting rod according to the invention.
  • a central circuit breaker conventionally comprises in a casing 1 of electrically insulating material filled with a dielectric insulating gas such as SF 6 , at a pressure of a few bars, a fixed contact 2 and a movable contact 3 with a nozzle 4 for blowing gases to extinguish electric arcs.
  • the movable contact 3 is moved in the axial direction A by a control mechanism 5 by means of an operating rod 6 having one end A connected to the rear of the movable contact 3 and one end B connected to the control mechanism 5.
  • the operating rod 6 comprises a section 7 of electrically insulating solid or hollow and generally cylindrical material, at the ends of which are fixed on the one hand a first metal frame 8 forming a deflector and constituting the end A of the rod and on the other hand a second metal frame 9 constituting the end B of the connecting rod.
  • a heat shield 10, here of tubular shape, is disposed between the reinforcements 8 and 9 and surrounds the insulating section 7 at a distance, leaving an annular free space 11 with it.
  • the shield 10 can be made of PTFE, ceramic or other electrically insulating material resistant to the electric arc.
  • the shield 10 is held in position around the insulating section 7 by fitting into the metal frame 8 or by any other fixing means and by a flange 12 attached for example to the end B of the connecting rod.
  • the shield 10 thermally protects the section 7 thanks to the thickness of unheated SF 6 filling the space 11 between the shield and the section.
  • the annular space defined between the shield 10 and the section 7 can be open and filled with dielectric gas isolating the circuit breaker.
  • this annular space can be completely closed hermetically to gas and filled with circuit breaker insulation gas or other dielectric gas, such as nitrogen, at the same or different pressure than the pressure of the dielectric gas circuit breaker insulation.
  • Dielectric gas pressure in space annular less than the pressure of the dielectric gas insulating the circuit breaker increases the thermal protection of section 7 of the connecting rod maneuver.

Abstract

The actuator rod, comprising an insulator (7) with metal fittings (8, 9) fixed to its two ends, has a thermal shield (10) of an electrical insulating material between the armatures, set at a distance from the insulator to form a free annular gap (11). The gap can be filled with the dielectric insulating gas used in the cut-out, but at a different pressure.

Description

L'invention concerne les disjoncteurs haute tension ou autres appareils de coupure électrique à isolation avec un gaz diélectrique, et plus particulièrement la bielle de manoeuvre du contact mobile d'un disjoncteur de centrale électrique qui est interposée entre le contact mobile et le mécanisme de commande du disjoncteur.The invention relates to high voltage circuit breakers or other devices. electric cut-off with dielectric gas insulation, and more particularly the operating rod of the movable contact of a circuit breaker power plant which is interposed between the moving contact and the circuit breaker control.

La bielle de manoeuvre d'un contact mobile de disjoncteur haute tension de centrale comprend généralement un tronçon cylindrique plein ou creux en matière électriquement isolante, par exemple de la fibre de verre renforcée avec de la résine, et deux armatures métalliques fixées respectivement aux extrémités du tronçon isolant et qui sont destinées l'une à être reliée au contact mobile du disjoncteur et l'autre à être reliée au mécanisme de commande.The operating rod of a movable contact of high voltage circuit breaker generally includes a full or hollow cylindrical section in electrically insulating material, for example glass fiber reinforced with resin, and two metal frames fixed respectively to the ends of the insulating section and which are intended one to be connected to the movable contact of the circuit breaker and the other to be connected to the control mechanism.

De façon connue, l'armature métallique de la bielle qui est destinée à être reliée au contact mobile du disjoncteur est généralement conçue en forme de déflecteur pour protéger le tronçon isolant de la bielle des arcs électriques qui se créent entre les deux contacts du disjoncteur lors des opérations d'ouverture. Ce déflecteur sert également à protéger le tronçon isolant des gaz chauds qui sont évacués en arrière du contact mobile. Malgré ce déflecteur, le tronçon isolant de la bielle subit des agressions thermiques très importantes (brûlures) pouvant entraíner une diminution inacceptable de sa tenue diélectrique. Pour protéger le tronçon isolant de ces agressions thermiques, on a déjà pensé à l'entourer d'une gaine en matière élastomère thermorétractable ou encore de bandes de PTFE (Poly-Tétra-Fluoro-Ethylène) collées. Toutefois, il est difficile avec ces techniques de protection d'éviter les problèmes d'inclusion d'air à l'interface entre le tronçon isolant et la protection.In known manner, the metal frame of the connecting rod which is intended to be connected to the moving contact of the circuit breaker is generally designed in shape deflector to protect the insulating section of the connecting rod from electric arcs which are created between the two contacts of the circuit breaker during opening operations. This deflector also serves to protect the insulating section from hot gases which are evacuated behind the movable contact. Despite this deflector, the section rod insulator undergoes very significant thermal attack (burns) may cause an unacceptable decrease in its dielectric strength. For protect the insulating section from these thermal attacks, we have already thought about surround it with a sheath made of heat-shrinkable elastomer or else PTFE (Poly-Tetra-Fluoro-Ethylene) strips glued. However, it is difficult with these protective techniques to avoid air inclusion problems at the interface between the insulating section and the protection.

Le but de l'invention est de fournir une autre forme de protection d'une telle bielle isolante simple à mettre en oeuvre et qui ne présente pas les inconvénients indiqués ci-dessus.The object of the invention is to provide another form of protection for a such an insulating rod simple to implement and which does not have the disadvantages noted above.

A cet effet, l'invention a pour objet une bielle de manoeuvre pour appareil de coupure électrique haute tension à isolation avec un gaz diélectrique, comprenant un tronçon en matière électriquement isolante et deux armatures métalliques fixées respectivement aux extrémités du tronçon, caractérisée en ce qu'un bouclier thermique en matière électriquement isolante est disposé entre les armatures métalliques et entoure à distance le tronçon isolant pour définir avec celui-ci un espace libre annulaire destiné à être rempli de gaz diélectrique. Avec cet agencement, en cas de micro-perforations du bouclier, il reste une épaisseur de gaz diélectrique non directement chauffé par les gaz ou les arcs électriques et qui protège thermiquement le tronçon isolant de la bielle de manoeuvre.To this end, the invention relates to an operating rod for an apparatus high voltage electric cut-off with dielectric gas insulation, comprising a section of electrically insulating material and two reinforcements of metal fixed respectively to the ends of the section, characterized in that that a heat shield made of electrically insulating material is placed between the metal reinforcements and surrounds the insulating section from a distance to define with the latter an annular free space intended to be filled with dielectric gas. With this arrangement, in the event of micro-perforations of the shield, there remains a thickness dielectric gas not directly heated by gases or electric arcs and which thermally protects the insulating section of the operating rod.

Le bouclier peut être réalisé en PTFE, en céramique ou autre matériau isolant et résistant à l'attaque d'un arc électrique.The shield can be made of PTFE, ceramic or other material insulating and resistant to attack by an electric arc.

L'invention s'étend à un disjoncteur à isolation au SF6 équipé d'une bielle de manoeuvre selon l'invention. L'espace annulaire défini par le bouclier peut être rempli du gaz diélectrique d'isolation du disjoncteur ou d'un autre gaz diélectrique si cet espace annulaire est complètement fermé.The invention extends to an SF6-insulated circuit breaker equipped with a operating rod according to the invention. The annular space defined by the shield can be filled with dielectric breaker insulation gas or other gas dielectric if this annular space is completely closed.

La figure 1 illustre de façon schématique un disjoncteur avec une bielle de manoeuvre selon l'invention.Figure 1 schematically illustrates a circuit breaker with a connecting rod of operation according to the invention.

La figure 2 montre très schématiquement en demi-coupe axiale un exemple de réalisation d'une bielle selon l'invention.Figure 2 shows very schematically in axial half-section a exemplary embodiment of a connecting rod according to the invention.

Figure 1, un disjoncteur de centrale comprend classiquement dans une enveloppe 1 en matière électriquement isolante remplie d'un gaz diélectrique d'isolation comme du SF6, à une pression de quelques bars, un contact fixe 2 et un contact mobile 3 avec une buse 4 de soufflage des gaz pour l'extinction des arcs électriques. Le contact mobile 3 est déplacé suivant la direction axiale A par un mécanisme de commande 5 par l'intermédiaire d'une bielle de manoeuvre 6 ayant une extrémité A reliée à l'arrière du contact mobile 3 et une extrémité B reliée au mécanisme de commande 5.Figure 1, a central circuit breaker conventionally comprises in a casing 1 of electrically insulating material filled with a dielectric insulating gas such as SF 6 , at a pressure of a few bars, a fixed contact 2 and a movable contact 3 with a nozzle 4 for blowing gases to extinguish electric arcs. The movable contact 3 is moved in the axial direction A by a control mechanism 5 by means of an operating rod 6 having one end A connected to the rear of the movable contact 3 and one end B connected to the control mechanism 5.

Figure 2, la bielle de manoeuvre 6 comprend un tronçon 7 en matière électriquement isolante plein ou creux et généralement cylindrique, aux extrémités duquel sont fixées d'une part une première armature métallique 8 formant un déflecteur et constituant l'extrémité A de la bielle et d'autre part une seconde armature métallique 9 constituant l'extrémité B de la bielle. Un bouclier thermique 10, ici de forme tubulaire, est disposé entre les armatures 8 et 9 et entoure à distance le tronçon isolant 7 en laissant un espace libre annulaire 11 avec celui-ci. Le bouclier 10 peut être réalisé en PTFE, en céramique ou autre matériau électriquement isolant résistant à l'arc électrique. Le bouclier 10 est maintenu en position autour du tronçon isolant 7 par emboítement dans l'armature métallique 8 ou par tout autre moyen de fixation et par une bride 12 rapportée par exemple à l'extrémité B de la bielle. Dans le montage de la figure 2, le bouclier 10 protège thermiquement le tronçon 7 grâce à l'épaisseur de SF6 non chauffé remplissant l'espace 11 entre le bouclier et le tronçon.FIG. 2, the operating rod 6 comprises a section 7 of electrically insulating solid or hollow and generally cylindrical material, at the ends of which are fixed on the one hand a first metal frame 8 forming a deflector and constituting the end A of the rod and on the other hand a second metal frame 9 constituting the end B of the connecting rod. A heat shield 10, here of tubular shape, is disposed between the reinforcements 8 and 9 and surrounds the insulating section 7 at a distance, leaving an annular free space 11 with it. The shield 10 can be made of PTFE, ceramic or other electrically insulating material resistant to the electric arc. The shield 10 is held in position around the insulating section 7 by fitting into the metal frame 8 or by any other fixing means and by a flange 12 attached for example to the end B of the connecting rod. In the assembly of FIG. 2, the shield 10 thermally protects the section 7 thanks to the thickness of unheated SF 6 filling the space 11 between the shield and the section.

L'espace annulaire défini entre le bouclier 10 et le tronçon 7 peut être ouvert et rempli du gaz diélectrique d'isolation du disjoncteur. En variante, cet espace annulaire peut être complètement fermé de façon hermétique au gaz et rempli du gaz d'isolation du disjoncteur ou d'un autre gaz diélectrique, comme de l'azote, à une pression identique ou différente de la pression du gaz diélectrique d'isolation du disjoncteur. Une pression du gaz diélectrique dans l'espace annulaire moindre que la pression du gaz diélectrique d'isolation du disjoncteur permet d'augmenter la protection thermique du tronçon 7 de la bielle de manoeuvre.The annular space defined between the shield 10 and the section 7 can be open and filled with dielectric gas isolating the circuit breaker. Alternatively, this annular space can be completely closed hermetically to gas and filled with circuit breaker insulation gas or other dielectric gas, such as nitrogen, at the same or different pressure than the pressure of the dielectric gas circuit breaker insulation. Dielectric gas pressure in space annular less than the pressure of the dielectric gas insulating the circuit breaker increases the thermal protection of section 7 of the connecting rod maneuver.

Claims (5)

Une bielle de manoeuvre pour appareil de coupure électrique haute tension à isolation avec un gaz diélectrique, comprenant un tronçon (7) en matière électriquement isolante et deux armatures métalliques (8,9) fixées respectivement aux extrémités du tronçon, caractérisée en ce qu'un bouclier thermique (10) en matière électriquement isolante est disposé entre les armatures (8,9) et entoure à distance le tronçon isolant pour définir avec celui-ci un espace libre annulaire (11).An operating rod for a high-voltage electrical cut-off device insulated with a dielectric gas, comprising a section (7) of electrically insulating material and two metal armatures (8, 9) fixed respectively to the ends of the section, characterized in that a heat shield (10) of electrically insulating material is disposed between the reinforcements (8,9) and surrounds the insulating section at a distance to define therewith an annular free space (11). La bielle de manoeuvre selon la revendication 1, dans laquelle le bouclier thermique est en PTFE ou en céramique.The operating rod according to claim 1, wherein the heat shield is made of PTFE or ceramic. La bielle de manoeuvre selon la revendication 1 ou 2, dans laquelle l'espace libre annulaire (11) est un espace complètement fermé.The operating rod according to claim 1 or 2, wherein the annular free space (11) is a completely closed space. Un appareil de coupure haute tension à isolation avec un gaz diélectrique à une pression de quelques bars, comprenant un contact mobile (3) relié à une bielle de manoeuvre (6) selon l'une des revendications 1 à 2, dans lequel l'espace libre annulaire (11) est rempli dudit gaz diélectrique d'isolation de l'appareil de coupure.A high voltage gas-insulated switchgear dielectric at a pressure of a few bars, comprising a movable contact (3) connected to an operating rod (6) according to one of claims 1 to 2, in which the annular free space (11) is filled with said dielectric gas insulating the switching device. Un appareil de coupure haute tension à isolation avec un gaz diélectrique à une pression de quelques bars, comprenant un contact mobile (3) relié à une bielle de manoeuvre (6) selon la revendication 3, dans lequel l'espace libre annulaire (11) complètement fermé est rempli d'un gaz diélectrique à une pression différente de celle dudit gaz diélectrique d'isolation de l'appareil de coupure.A high voltage gas-insulated switchgear dielectric at a pressure of a few bars, comprising a movable contact (3) connected to an operating rod (6) according to claim 3, in which the space free ring (11) completely closed is filled with a dielectric gas at a pressure different from that of said dielectric gas insulating the apparatus cut.
EP01401459A 2000-07-03 2001-06-06 Actuating rod for a high tension circuit breaker Expired - Lifetime EP1170766B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0008618A FR2811137B1 (en) 2000-07-03 2000-07-03 MANEUVERING ROD FOR HIGH VOLTAGE CIRCUIT BREAKER
FR0008618 2000-07-03

Publications (2)

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EP1170766A1 true EP1170766A1 (en) 2002-01-09
EP1170766B1 EP1170766B1 (en) 2004-08-18

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EP01401459A Expired - Lifetime EP1170766B1 (en) 2000-07-03 2001-06-06 Actuating rod for a high tension circuit breaker

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US (1) US6583375B2 (en)
EP (1) EP1170766B1 (en)
JP (1) JP4786825B2 (en)
AT (1) ATE274232T1 (en)
CA (1) CA2351784A1 (en)
DE (1) DE60104946T2 (en)
FR (1) FR2811137B1 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB0225088D0 (en) * 2002-10-29 2002-12-04 Univ Liverpool circuit breaker
EP1771131A2 (en) * 2004-05-20 2007-04-11 CooperVision Inc. Corneal onlays and wavefront aberration correction to enhance vision
KR101071098B1 (en) * 2010-01-26 2011-10-10 엘에스산전 주식회사 Gas insulated circuit breaker
FR2985081B1 (en) * 2011-12-21 2015-03-06 Alstom Technology Ltd DEVICE FOR PROTECTION AGAINST PARTICLES GENERATED BY AN ELECTRIC SWITCHING ARC
EP3285276B1 (en) 2016-08-19 2021-09-29 General Electric Technology GmbH Drive rod and method of manufacturing a drive rod

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1690121A1 (en) * 1967-12-22 1971-04-15 Sachsenwerk Licht & Kraft Ag High voltage circuit breaker
US4883930A (en) * 1987-10-30 1989-11-28 Cooper Power Systems, Inc. Switch mechanism operating rod

Family Cites Families (5)

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Publication number Priority date Publication date Assignee Title
US4215255A (en) * 1978-01-05 1980-07-29 Electric Power Research Institute, Inc. Vacuum arc switching device with internal shielding
JPS60162340U (en) * 1984-04-05 1985-10-28 株式会社富士電機総合研究所 Insulated operation rod for contacts in closed containers
US4780581A (en) * 1987-10-30 1988-10-25 Rte Corporation Suicide switch/interrupter with variable volume chamber and puffer action
FR2650699B1 (en) * 1989-08-07 1995-10-20 Alsthom Gec
JPH06203705A (en) * 1993-01-06 1994-07-22 Toshiba Corp Puffer type gas blast circuit breaker

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1690121A1 (en) * 1967-12-22 1971-04-15 Sachsenwerk Licht & Kraft Ag High voltage circuit breaker
US4883930A (en) * 1987-10-30 1989-11-28 Cooper Power Systems, Inc. Switch mechanism operating rod

Also Published As

Publication number Publication date
ATE274232T1 (en) 2004-09-15
FR2811137A1 (en) 2002-01-04
US6583375B2 (en) 2003-06-24
EP1170766B1 (en) 2004-08-18
JP4786825B2 (en) 2011-10-05
CA2351784A1 (en) 2002-01-03
FR2811137B1 (en) 2002-08-23
DE60104946D1 (en) 2004-09-23
JP2002075140A (en) 2002-03-15
US20020003128A1 (en) 2002-01-10
DE60104946T2 (en) 2005-08-18

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