EP0632928B1 - Interrupteur a vide avec un montage en boucle de courant - Google Patents

Interrupteur a vide avec un montage en boucle de courant Download PDF

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Publication number
EP0632928B1
EP0632928B1 EP93905196A EP93905196A EP0632928B1 EP 0632928 B1 EP0632928 B1 EP 0632928B1 EP 93905196 A EP93905196 A EP 93905196A EP 93905196 A EP93905196 A EP 93905196A EP 0632928 B1 EP0632928 B1 EP 0632928B1
Authority
EP
European Patent Office
Prior art keywords
lever
vacuum interrupter
drive lever
current
connection bolt
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.)
Expired - Lifetime
Application number
EP93905196A
Other languages
German (de)
English (en)
Other versions
EP0632928A1 (fr
Inventor
Ulrich Marquardt
Günter Prietzel
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.)
Siemens AG
Original Assignee
Siemens AG
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
Application filed by Siemens AG filed Critical Siemens AG
Publication of EP0632928A1 publication Critical patent/EP0632928A1/fr
Application granted granted Critical
Publication of EP0632928B1 publication Critical patent/EP0632928B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
    • H01H33/66—Vacuum switches
    • H01H33/666—Operating arrangements
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H77/00—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting
    • H01H77/02—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting in which the excess current itself provides the energy for opening the contacts, and having a separate reset mechanism
    • H01H77/10—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting in which the excess current itself provides the energy for opening the contacts, and having a separate reset mechanism with electrodynamic opening
    • H01H77/101—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting in which the excess current itself provides the energy for opening the contacts, and having a separate reset mechanism with electrodynamic opening with increasing of contact pressure by electrodynamic forces before opening
    • 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
    • H01H33/022—Details particular to three-phase circuit breakers

Definitions

  • the invention relates to a vacuum switch with a displaceable connecting pin having a vacuum interrupter and with a drive device and a lever arrangement assigned to the vacuum interrupter for connecting the common drive device to the vacuum interrupter, the lever arrangement having a two-armed drive lever articulated to the displaceable connecting bolt, which on one side of the displaceable connecting bolt is connected to the drive device and which cooperates on the other side of the displaceable connecting bolt with a fixed support, further with a contact force spring and a current loop arrangement formed from a flexible current band for obtaining a contact force of the vacuum interrupter as a function of the current increasing force.
  • a vacuum switch with these features has become known from DE-B-24 50 424.
  • the vacuum switch described there is a three-pole contactor, in which the current loop arrangement serves to increase the contact force depending on the current in the properly switched-on state and to increase the opening force when switching off to break up any welds on the contact pieces.
  • the current loop arrangement forms an independent assembly, the space requirement of which is approximately as large as the space requirement of the two-armed drive lever.
  • the object of the invention is to significantly reduce the space requirement of the lever and current loop arrangement in order to facilitate the construction of compact switching devices.
  • the fixed support is designed as a stop surface against which the drive lever can be placed by the contact force spring
  • the contact force spring being designed as a tension spring and being arranged between an end part of the drive lever projecting beyond the stop surface and a stationary abutment
  • one leg of the flexible current band is connected to the displaceable connecting bolt and is arranged in a force-transmitting manner against the drive lever, including its end part, while the other leg of the current band is supported in a stationary manner.
  • the contact force spring also acts as an opening spring when its end connected to the drive device is released.
  • the common use of a spring as a contact force spring and as an opening spring in vacuum switches is known per se from DE-A-34 14 016.
  • the drive lever can have two legs connecting the current band and a middle part connecting the legs, which serves as a support surface for supporting the leg of the current band connected to the displaceable connecting bolt.
  • Figure 1 shows schematically a multi-pole vacuum switch in a top view.
  • FIG. 2 shows a pole unit of the multi-pole vacuum switch according to FIG. 1 in the closed state.
  • FIG. 3 shows the pole unit according to FIG. 2 in the closed state with a view of one of the narrow sides.
  • FIG. 4 shows one of the shell-like insulating pieces from which the insulating arrangement of the pole unit according to FIGS. 2 and 3 is composed.
  • FIG. 5 shows the insulating piece according to FIG. 4 from above.
  • the vacuum switch 1 shown in FIG. 1 has a three-pole design and has three pole units 2 which are arranged next to one another without a gap.
  • the pole block 3 formed in this way is held together by clamping bolts 4, which penetrate the pole units 2 and thereby also capture side walls 5, which form the lateral termination of the pole block 3 and which project beyond the pole block 3.
  • a drive device 6 which is used in a known manner for switching the vacuum interrupters contained in the pole units 2 on and off.
  • pole units 2 Details of one of the pole units 2 are explained in more detail below with reference to FIGS. 2 to 5. First of all, the basic structure is described with reference to FIGS. 2 and 3.
  • the pole unit 2 has a vacuum interrupter 10, which has a housing 11 with an upper end flange 12 and a lower end flange 13. The end flange 13 also forms the one connection point of the vacuum interrupter 10.
  • a connection rail 14 bent at right angles is provided as the connection device.
  • a displaceably mounted connecting bolt 15 extends through the upper end flange 12, to which one leg 16 of a flexible current band 17 is fastened.
  • the current band 17 is approximately loop-shaped and has a shorter leg 18 which is approximately parallel to the leg 16 and to which a straight connecting rail 20 is connected.
  • the connecting rail 20 extends parallel to the extension of the longitudinal axis of the vacuum interrupter 10 upwards, while the legs of the current band 17 are arranged transversely to this longitudinal axis.
  • the parts described above form the current path of the pole unit 2.
  • This current path is contained in an insulating arrangement 23 formed from two approximately shell-shaped insulating pieces 21 and 22.
  • the shape of the insulating piece 22 is explained in more detail with reference to FIGS. 4 and 5.
  • the insulating piece 22 has wall sections protruding from an essentially flat wall part 24, through which a number of rooms or chambers are formed.
  • Two wall sections 25 and 26 are provided with approximately semicircular recesses 27 and 28, which are adapted to the shape of the end flanges 12 and 13 of the vacuum interrupter 10.
  • connection chamber 31 which is provided for receiving the flexible current band 17 shown in FIG.
  • the connection chamber communicates with a drive chamber 29 located to the side of the vacuum interrupter 10.
  • Upper wall parts 32 and 33 extend approximately parallel to the longitudinal axis of the vacuum interrupter 10 (FIG. 2) and each contain a recess 34 for inserting a nut.
  • Figures 2 and 3 show that by placing a closure piece 35 which extends over the entire width of the insulating arrangement 23 and is connected to the insulating pieces 21 and 22 via a total of four fastening screws 36, a measuring chamber 37 is formed in which a dashed line current transformer indicated in its outline can be accommodated.
  • the wall section 30 and the closure piece 35 have aligned openings for the passage of the above-mentioned upper connecting rail 20.
  • FIG. 4 also shows on the right side of the space provided for receiving the vacuum interrupter an angular wall section 40, on the underside of which there is an undercut 41.
  • a spring chamber 42 is formed which, according to FIGS. 2 and 3, serves to receive two contact force springs 43.
  • the contact force springs 43 are in the untensioned state shown how it results after the installation of the current path and the connection of the movable connecting bolt 15 with parts to be explained.
  • the prestressing of the contact force springs 43 required for operation is brought about by inserting a bolt 44 indicated by a broken line into lower eyelets 45 of the two contact force springs 43 and hooking this bolt into the undercuts 41 of the two insulating pieces 21 and 22 belonging together.
  • the drive parts are free of force and therefore the vacuum interrupter 10 is in the on state under the influence of atmospheric air pressure.
  • the drive device 6 shown schematically in FIG. 1 interacts according to FIG. 2 with a clutch lever 46 of each of the pole units 2.
  • the coupling lever 46 is pivotally mounted on a bolt 47 (FIG. 2) which engages in bearing eyes 48 of the insulating pieces 21 and 22 at both ends.
  • One of the bearing eyes 48 is shown in FIG. 4.
  • An adjustable coupling rod 50 which extends approximately parallel to the longitudinal axis of the vacuum interrupter 10, is located in the drive chamber 29 and connects the coupling lever 46 to a drive lever 51 located in the connection chamber 31.
  • This is formed by an approximately U-shaped sheet metal part and has legs 52 and a middle part 53, which does not have to extend over the entire length of the legs 52.
  • the drive lever 51 is mounted on the displaceable connecting bolt 15 by means of a bearing bolt 54.
  • Another hinge pin 55 extends through the legs 52 and engages in a window-like recess 56 shown in dashed lines, the lower edge of which forms a stop surface 57 for the hinge pin 55.
  • An end part 58 of the drive lever 51 which projects beyond the hinge pin 55 serves as Abutment for the aforementioned contact force springs 43, either directly or by means of the tabs 59 shown in connection with a bolt 60 connecting the tabs 59.
  • the flexible current band 17 lies essentially completely between the legs 52 of the drive lever 51 and is accommodated in a very space-saving manner in this way.
  • the desired function is obtained in that the lower leg 16 of the current band 17 can be supported against the central part 53, while the upper leg 18 bears against the wall section 30. A spreading the legs 16 and 18 of the current band 17, depending on the current flowing force therefore presses the drive lever 51 downward such that the contact force of the vacuum interrupter 10 is increased.
  • the hinge pin 55 When switched on, the hinge pin 55 is at a certain distance from the stop surface 57, so that the bearing pin 54 forms the pivot bearing of the drive lever 51. If the drive device 6 (FIG. 1) is released for switching off, which corresponds to a release of the clutch lever 46, the right end of the drive lever 51, which is connected to the coupling rod 50, loses its hold. The drive lever 51 then pivots counterclockwise around its bearing pin 54 until the hinge pin 55 reaches the stop surface 57 and the stop surface 57 now forms the pivot bearing of the drive lever 51.
  • the contact springs 43 now act opening with the lever arm of the end part 58 of the drive lever 51.
  • the use of springs in such a way that they act both as contact springs and as opening springs is known per se in vacuum switches, such as DE-A-34 14 016 can be seen.
  • the insulating pieces 21 and 22 are provided with aligned through openings 61.
  • the insulating pieces 21 and 22 are held together before their final connection by the clamping bolts 4 by connecting screws 62 which pass through the wall sections of the insulating pieces 21 and 22 and engage in the connecting rails 14 and 20.
  • the use of the insulating pieces makes it possible to achieve a very space-saving arrangement of the vacuum interrupters, including the associated assemblies.
  • the loop-shaped current band is integrated in the drive parts with practically no additional space requirement. Therefore, the invention is particularly suitable for the construction of compact switching devices, for. B. for circuit breakers in the voltage range up to 1000 V, especially in three or four-pole version.

Abstract

Un interrupteur à vide (1) comporte un tube commutateur à vide (10) pouvant être actionné au moyen d'un levier par un dispositif d'entraînement. Un levier de commande à deux bras (51) est monté pivotant sur le boulon de raccordement mobile (15) du tube commutateur (10) et coopère avec une surface de butée (57) contre laquelle le levier de commande (51) peut s'appliquer par l'intermédiaire d'un ressort de contact (43). Une bande conductrice bouclée (17) disposée entre les branches (52) du levier de commande (51) sert à la compensation des forces de soulèvement du contact: l'une des branches (16) de cette bande s'applique contre la partie médiane (53) du levier de commande, tandis que l'autre branche (18) est supportée de manière fixe. Ce montage en boucle de courant et à levier convient à la réalisation d'interrupteurs de puissance compacts.

Claims (2)

  1. Interrupteur à vide (1) comportant un tube interrupteur à vide (10) ayant une broche déplaçable de raccordement (15), ainsi qu'un dispositif d'entraînement (6) et un dispositif à levier, qui est associé au tube interrupteur à vide (10) et qui est destiné à relier le dispositif commun d'entraînement (6) au tube interrupteur à vide (10), le dispositif à levier comportant un levier d'entraînement à deux bras (51), qui est relié de façon articulée à la broche de raccordement déplaçable (15) et qui est relié, sur l'un des côtés de la broche de raccordement (15), au dispositif d'entraînement (6), et, de l'autre côté de la broche de raccordement déplaçable (15), à un appui fixe, et comportant en outre un ressort (43) de force de contact et un dispositif à boucle de courant, qui est formé par une bande conductrice (17), pour l'obtention d'une force qui augmente la force de contact du tube interrupteur à vide (10) en fonction du courant,
    caractérisé par le fait que l'appui fixe est sous la forme d'une surface de butée (57), à laquelle le levier d'entraînement (51) peut être appliqué par le ressort (43) de force de contact, le ressort (43) de contact ayant la forme d'un ressort de traction et étant disposé entre une partie d'extrémité (58), qui dépasse de la surface de butée (57), du levier d'entraînement (51) et un support fixe (44), et une des branches (16) de la bande conductrice (17) est reliée à la broche déplaçable de raccordement (15) et est disposée de manière à s'appliquer au levier d'entraînement (51) y compris à sa partie d'extrémité (58) en transmettant une force, tandis que l'autre branche (18) de la bande conductrice (17) est supportée de façon fixe.
  2. Interrupteur à vide suivant la revendication 1, caractérisé par le fait que le levier d'entraînement (51) comporte deux branches (52) recevant entre elles la bande conductrice (17), et une partie médiane (53) qui relie les branches (52) et qui est utilisée en tant que surface d'appui de la branche (18), qui est reliée à la broche de raccordement (15), de la bande conductrice (17).
EP93905196A 1992-03-27 1993-03-12 Interrupteur a vide avec un montage en boucle de courant Expired - Lifetime EP0632928B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4210714 1992-03-27
DE4210714A DE4210714A1 (de) 1992-03-27 1992-03-27 Vakuumschalter mit einer Stromschleifenanordnung
PCT/DE1993/000242 WO1993020571A1 (fr) 1992-03-27 1993-03-12 Interrupteur a vide avec un montage en boucle de courant

Publications (2)

Publication Number Publication Date
EP0632928A1 EP0632928A1 (fr) 1995-01-11
EP0632928B1 true EP0632928B1 (fr) 1996-01-03

Family

ID=6455644

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93905196A Expired - Lifetime EP0632928B1 (fr) 1992-03-27 1993-03-12 Interrupteur a vide avec un montage en boucle de courant

Country Status (5)

Country Link
US (1) US5528009A (fr)
EP (1) EP0632928B1 (fr)
JP (1) JP3983797B2 (fr)
DE (2) DE4210714A1 (fr)
WO (1) WO1993020571A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9409006U1 (de) * 1994-05-30 1994-07-28 Siemens Ag Isolierträger für Vakuumschaltröhren
DE4419380C1 (de) * 1994-05-30 1995-10-19 Siemens Ag Leistungsschaltermodul
US9177742B2 (en) 2011-10-18 2015-11-03 G & W Electric Company Modular solid dielectric switchgear
DE102013216018B4 (de) * 2013-08-13 2021-06-02 Siemens Aktiengesellschaft Vorrichtung zur Übertragung von Kräften

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1132639B (de) * 1959-12-23 1962-07-05 Siemens Ag Schalter bzw. Selbstschalter
DE1151059B (de) * 1961-10-27 1963-07-04 Licentia Gmbh Strombegrenzender Selbstschalter
GB1217484A (en) * 1966-11-15 1970-12-31 Reyrolle A & Co Ltd Improvements relating to contact operating mechanisms for electric circuit-breakers
GB1307991A (en) * 1969-01-23 1973-02-21 Reyrolle Co Ltd A Moving contact arrangements for electric circuit-breakers
US3663906A (en) * 1969-10-09 1972-05-16 Gen Electric Electric circuit breaker with magnetically assisted closing means
GB1348130A (en) * 1970-11-20 1974-03-13 Bill Switchgear Ltd Switchgear
DE7241723U (de) * 1972-11-14 1973-04-05 Kiepe Bahn Elektrik Gmbh Bandnockenschalter mit zwei Schalenhäften und einem in diesen gelagerten Nockenhebel
SU518816A1 (ru) * 1973-10-15 1976-06-25 Предприятие П/Я Х-5749 Привод вакуумного выключател
US3921109A (en) * 1974-06-20 1975-11-18 Westinghouse Electric Corp Circuit-interrupter
US4247745A (en) * 1978-09-13 1981-01-27 Westinghouse Electric Corp. Vacuum-type contactor assembly
US4591679A (en) * 1984-03-16 1986-05-27 Rte Corporation Loadbreak switch actuator
DE3414016A1 (de) * 1984-04-12 1985-10-17 Siemens AG, 1000 Berlin und 8000 München Vakuumschaltgeraet mit einer antriebsvorrichtung sowie mit einer an dem beweglichen anschlussbolzen der schaltroehre abgestuetzten feder
DE3432086A1 (de) * 1984-08-28 1986-03-06 Siemens AG, 1000 Berlin und 8000 München Kontaktanordnung mit einer die kontaktkraft vergroessernden stromabhaengigen kraft
DE3915522A1 (de) * 1989-05-11 1990-11-15 Siemens Ag Antriebsvorrichtung fuer eine vakuumschaltroehre mit einer kontaktfeder
DE8905949U1 (fr) * 1989-05-11 1990-09-13 Siemens Ag, 1000 Berlin Und 8000 Muenchen, De

Also Published As

Publication number Publication date
DE4210714A1 (de) 1993-09-30
JP3983797B2 (ja) 2007-09-26
EP0632928A1 (fr) 1995-01-11
JPH07505252A (ja) 1995-06-08
DE59301350D1 (de) 1996-02-15
WO1993020571A1 (fr) 1993-10-14
US5528009A (en) 1996-06-18

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