EP3138113B1 - Prévention de défauts d'alignement d'une barre d'entraînement d'un disjoncteur - Google Patents

Prévention de défauts d'alignement d'une barre d'entraînement d'un disjoncteur Download PDF

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Publication number
EP3138113B1
EP3138113B1 EP15728813.5A EP15728813A EP3138113B1 EP 3138113 B1 EP3138113 B1 EP 3138113B1 EP 15728813 A EP15728813 A EP 15728813A EP 3138113 B1 EP3138113 B1 EP 3138113B1
Authority
EP
European Patent Office
Prior art keywords
drive rod
guide
drive
pole shell
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.)
Active
Application number
EP15728813.5A
Other languages
German (de)
English (en)
Other versions
EP3138113A1 (fr
Inventor
Unni Suresh
Fabian RÖHRIG
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 EP3138113A1 publication Critical patent/EP3138113A1/fr
Application granted granted Critical
Publication of EP3138113B1 publication Critical patent/EP3138113B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • H01H11/00—Apparatus or processes specially adapted for the manufacture of electric switches
    • H01H11/04—Apparatus or processes specially adapted for the manufacture of electric switches of switch contacts
    • 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
    • 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
    • H01H2033/6667—Details concerning lever type driving rod arrangements

Definitions

  • the invention relates to a circuit breaker with a vacuum interrupter accommodated in a pole shell having a fixed contact and a moving contact and with an electrically insulating drive rod for initiating a drive movement from a switch drive into the moving contact for opening or closing the contact system of the vacuum interrupter.
  • the invention also relates to a method for avoiding misalignment of a drive rod of a circuit breaker.
  • a moving contact is moved along a central axis of the vacuum interrupter relative to a fixed contact.
  • a switch drive provides a corresponding drive movement.
  • An electrically insulating drive rod which connects the switch drive to the vacuum interrupter, serves to initiate the drive movement in the moving contact connection bolt of the vacuum interrupter.
  • the US3261954A and the GB1123629A have guide means on the moving contact or the drive rod.
  • the EP2575153A2 shows a threaded adapter which has a guide pin which is guided in a socket.
  • the CN203339047U discloses a vacuum switch, the moving contact being guided in a bearing on the vacuum interrupter.
  • One object of the present invention is to provide a particularly simple and at the same time inexpensive solution for avoiding misalignment of the drive rod.
  • circuit breaker according to claim 1 or by a method according to claim 4.
  • Advantageous embodiments of the invention are specified in the subclaims. The advantages and configurations explained below in connection with the circuit breaker also apply mutatis mutandis to the method according to the invention and vice versa.
  • the circuit breaker comprises a vacuum interrupter accommodated in a pole shell with a fixed contact and a moving contact, an electrically insulating one Drive rod for initiating a drive movement from a switch drive into the moving contact for opening or closing the contact system of the vacuum interrupter and a guide and / or centering means provided radially between the drive rod and the pole shell, designed for the independent axial alignment of the drive rod in the pole shell, whereby the Guide and / or centering means is connected to the drive rod.
  • the method according to the invention for avoiding misalignment of a drive rod of a circuit breaker is characterized in that the drive rod in the pole shell automatically aligns itself axially. This self-alignment takes place with the aid of a guide and / or centering means which is provided radially between the drive rod and the pole shell and is connected to the drive rod.
  • a basic idea of the invention is to provide a drive rod that centers itself in the pole shell.
  • the structural means required for self-alignment are attached to the drive rod itself. These structural means are preferably attached exclusively to the drive rod itself, so that changes to the pole shell are not necessary. Lateral movements of the drive rod in the pole shell are prevented by guide and / or centering means attached to the drive rod, which are positioned radially between the drive rod and the pole shell.
  • This is preferably at least one suitable guide and / or centering element.
  • This element preferably has dimensions at at least one point along the longitudinal axis of the drive rod such that tilting movements of the drive rod in the pole shell are essentially excluded, but are in any case reduced to a minimum.
  • the guiding and / or centering element is an annular flange whose diameter is adapted to a cylindrical shape of the pole shell in such a way that a more or less uniform, minimal annular gap is present when the drive rod is precisely aligned.
  • tilting movements are reduced to a minimum or a minimal annular gap is present means that the guide and / or centering means do not impair an axial longitudinal movement of the drive rod and thus the proper functionality of the drive rod for transmitting a drive movement to the moving contact additional radial play of the drive rod does not exist or is limited as far as possible.
  • the guide and / or centering element is always adapted to the shape of the pole shell, more precisely to the contour of the inside of the housing of the switch pole.
  • the element can also have an angular shape in order to prevent the drive rod from tilting in a pole shell having an angular cross section.
  • the guide and / or centering means can be designed as individually manageable construction elements. In one embodiment of the invention, however, the guide and / or centering means are not only attached to the drive rod, but are part, in particular, an integral part of the drive rod. The guide and / or centering means are then preferably connected in one piece to the drive rod, in particular permanently connected to the generally cylindrical base body of the drive rod.
  • the guide and / or centering means do not have to be provided continuously around the drive rod be.
  • the at least one guide and / or centering element does not have to be able to strike the inside of the pole shell all around. In such a case it may e.g. B. be sufficient if the drive rod has a guide and / or centering element which has an enlarged diameter only on two opposite sides.
  • the pole shell is not designed to be circumferentially closed, so there is no circumferential stop or guide surface for the guide and / or centering element.
  • the drive rod not only serves to mechanically connect the vacuum interrupter, more precisely the moving contact of the vacuum interrupter, to the switch drive, but also to isolate the switch drive from the contact arrangement.
  • the drive rod can have ribs made of insulating material pointing radially outward from the rod base in order to obtain a greater creepage distance.
  • the guide and / or centering element according to the invention can be obtained particularly easily if at least one of these ribs is made enlarged, in particular in such a way that its outer diameter is only insignificantly smaller than the inner diameter of the pole shell at this point.
  • the guide and / or centering element can then be manufactured in the simplest manner during the manufacture of the drive rod or the ribs, for example with the aid of an injection molding process.
  • the guide and / or centering element is preferably provided at that end of the drive rod or in the area of that end of the drive rod that is opposite the vacuum interrupter or the moving contact connection bolt of the vacuum interrupter, i.e. at or in the area of the end of the drive rod facing the switch drive. This will a possible lateral position deviation of the drive rod directly at the point of application of force prevents. A misalignment on the moving contact connection bolt that increases due to the geometry of the drive rod is therefore excluded from the outset.
  • the constructive design of the switch pole is not complicated by the invention, since no additional components are required.
  • the guide and / or centering means are designed as part of the drive rod, in particular as an integral part of the drive rod.
  • centering element can simply be injection-molded onto the drive rod or its insulating ribs, which are anyway to be produced from a plastic material, the additional costs are minimal.
  • the invention can be used particularly advantageously in medium-voltage circuit breakers.
  • FIG 1 shows an example of a switch pole 2 of a circuit breaker 1, for example a medium-voltage circuit breaker.
  • the two other switch poles 2 of the circuit breaker 1 are not shown.
  • the switch pole 2 has a pole shell 3 in which a vacuum interrupter 4 is accommodated.
  • the vacuum interrupter 4 is used to switch or interrupt a current carried through the circuit breaker 1.
  • the details of the vacuum interrupter 4 and the structure of the switch pole 2 are not shown in detail.
  • the fixed contact of the vacuum interrupter 4 is connected in an electrically conductive manner to a pole head 5 via a fixed contact connection bolt.
  • the pole head 5 is connected to a switchgear in which the circuit breaker 1 is used.
  • the moving contact of the vacuum interrupter 4 is connected via a moving contact connection bolt to a pole carrier 6, which in turn is electrically connected to the switchgear in which the circuit breaker 1 is used.
  • the lifting movement of the moving contact takes place in the direction of a central axis 7.
  • the vacuum interrupter 4 and the pole carrier 6 are followed by an axially movable drive rod 8, which mechanically connects the vacuum interrupter 4 to the switch drive 9, which is only indicated.
  • the drive rod 8 is coupled to the moving contact, more precisely to the moving contact connecting bolt of the vacuum interrupter 4.
  • the drive rod 8 is designed to be electrically insulating or has at least one insulating section in order to ensure galvanic separation between the current path on the one hand and the switch drive 9 on the other. Insulating ribs 12 spaced apart from one another are provided on a cylindrical base body 11 of the drive rod 8 in order to form a sufficient creepage distance.
  • the drive rod 8 extends through the base plate of the circuit breaker 1, which is arranged in the pole carrier 6, to initiate a drive movement, symbolized by arrow 13, in the moving contact connection bolt for opening or closing the contact system of the vacuum interrupter 4.
  • the drive rod 8, also known as an insulating rod or insulating rod, which creates a mechanical connection between the switch drive 9 and the vacuum interrupter 4, is made of a plastic material and is connected to the switch drive 9, in particular a mechanical lever of the switch drive 9, at its lower end 14 opposite the moving contact connection bolt.
  • a connecting means 15 attached to the end of the drive rod 8, here in the form of a screw nut, for connecting the drive rod 8 to the switch drive 9 is shown.
  • Radially acting forces i.e. forces that act perpendicular to that central axis 7, in the direction of which the drive rod 8 performs a longitudinal movement 13 during a switching process, can result in a misalignment of the drive rod 8 in constructions known from the prior art.
  • a misalignment is indicated by way of example by a line 16 illustrating the axial position, at the end of which the indicated moving contact 17 is located.
  • the drive rod 8 with its insulating ribs 12 is arranged freely in the pole shell 3. In other words, the insulating ribs touch 12 does not show the inside 18 of the pole shell 3 even if the drive rod 8 is inclined.
  • FIG 2 illustrated switch pole 2 of a circuit breaker 1 differs from that in FIG 1 switch pole 2 shown in that at the lower end of the drive rod 8 opposite the moving contact connection bolt or in this end region 14 of the drive rod 8, an annular flange 21 is provided, the outer diameter 22 of which is slightly smaller than the inner diameter 23 of the pole shell 3 at this axial point 24.
  • This annular flange 21 is a further insulating rib connected to the base body 11 of the drive rod 8, which acts as a guide and / or centering element, positioned radially between the drive rod 8 on the one hand and the pole shell 3 on the other, for the independent axial alignment of the drive rod 8 in the pole shell 3 is used.
  • the annular flange 21 is also made from a suitable plastic material and is connected in one piece to the base body 11 of the drive rod 8, in particular injection molded onto it.
  • the annular flange 21 completely encompassing the base body 11 of the drive rod 8 is the only structural element present along the axis 7 of the drive rod 8 with a larger diameter 22 than the other insulating ribs 12.
  • the circumference forms, more precisely said the lateral surface 25 of this annular flange 21 with the inside 18 of the pole shell 3 from a uniform annular gap 26, see FIG 2 and 5 .
  • a lateral movement of the drive rod 8 or in other words a movement in the radial direction, ie in the direction perpendicular to that central axis 7 in the direction of which the drive rod 8 performs a longitudinal movement 13, is thus limited to a minimum, namely to the width of the annular gap 26th
  • the drive rod 8 is applied radially, i.e. transversely to the central axis 7, then this lateral movement is restricted and the annular flange 21 then serves as a guide and / or centering element for guiding the drive rod 8 in the pole shell 3.
  • the drive rod 8 aligns thus independently axially. In these cases, there is actually a mechanical contact between the annular flange 21 on the one hand and the pole shell 3, more precisely its inside 18 on the other hand. If, on the other hand, there is no or only little lateral action on the drive rod 8 by the switch drive 9, the drive rod 8 moves in the desired axial direction 13 without the ring flange 21 touching the inside 18 of the pole shell 3.
  • FIGS 3 and 4 The difference between the structural design of a conventional drive rod 8 and a drive rod 8 of the switch pole 2 of a circuit breaker 1 according to the invention is shown in FIGS 3 and 4 illustrated again.
  • the thickness, more precisely the axial thickness 27 of the guide and / or centering element embodied, for example, as an annular flange 21, can also be varied.
  • the annular flange 21 is designed as a thin rib, as in FIG FIG 5 shown.
  • a drive rod 8 with such an annular flange 21 is shown in FIG FIG 6 illustrated.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)

Claims (4)

  1. Disjoncteur (1)
    - comprenant un tube (4) de commutation sous vide, qui est reçu dans une coupelle (3) polaire et qui a un contact fixe et un contact mobile,
    - comprenant une barre (8) d'entraînement, constituée de manière isolante électriquement pour qu'un entraînement (9) à interrupteur donne un mouvement (13) d'entraînement au contact mobile, afin d'ouvrir ou de fermer le système de contact du tube (4) de commutation sous vide,
    - comprenant un moyen (21) de guidage et/ou de centrage, qui est prévu radialement entre la barre (8) d'entraînement et la coupelle (3) polaire et qui est constitué de manière à orienter axialement automatiquement la barre (8) d'entraînement dans la coupelle (3) polaire,
    - dans lequel le moyen (21) de guidage et/ou de centrage est relié à la barre (8) d'entraînement,
    caractérisé en ce que
    le moyen (21) de guidage et/ou de centrage est une partie constitutive de la barre (8) d'entraînement, dans lequel le moyen (21) de guidage et/ou de centrage a, le long d'un axe (7) longitudinal de la barre (8) d'entraînement, une dimension agrandie par rapport à un corps (11) de base de la barre (8) d'entraînement, dans lequel
    le moyen (21) de guidage et/ou de centrage est une bride annulaire disposée sur la barre (8) d'entraînement, et dans lequel
    le moyen (21) de guidage et/ou de centrage est une nervure isolée disposée sur la barre (8) d'entraînement.
  2. Disjoncteur (1) suivant la revendication 1, dans lequel le moyen (21) de guidage et/ou de centrage est un élément de construction isolant du point de vue électrique et disposé sur la barre (8) d'entraînement.
  3. Disjoncteur (1) suivant l'une des revendications 1 ou 2, dans lequel le moyen (21) de guidage et/ou de centrage est prévu à l'extrémité ou dans la région de l'extrémité de la barre (8) d'entraînement, qui est tournée vers l'entraînement (9) à interrupteur.
  4. Procédé pour empêcher des orientations défectueuses d'une barre (8) d'entraînement d'un disjoncteur (1) suivant l'une des revendications 1 à 3, qui a un tube (4) de commutation sous vide logé dans une coupelle (3) polaire et ayant un contact fixe et un contact mobile, ainsi qu'une barre (8) d'entraînement, constituée de manière isolante du point de vue électrique pour donner, par un entraînement (9) à interrupteur, un déplacement (13) d'entraînement au contact mobile, afin d'ouvrir ou de fermer le système de contact du tube (4) à commutation sous vide, la barre (8) d'entraînement s'orientant axialement automatiquement dans la coupelle (3) polaire, à l'aide d'un moyen (21) de guidage et/ou de centrage, prévu radialement entre la barre (8) d'entraînement et la coupelle (3) polaire et relié à la barre (8) d'entraînement.
EP15728813.5A 2014-06-30 2015-06-05 Prévention de défauts d'alignement d'une barre d'entraînement d'un disjoncteur Active EP3138113B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102014212583.9A DE102014212583A1 (de) 2014-06-30 2014-06-30 Vermeidung von Fehlausrichtungen einer Antriebsstange eines Leistungsschalters
PCT/EP2015/062608 WO2016000907A1 (fr) 2014-06-30 2015-06-05 Prévention de défauts d'alignement d'une barre d'entraînement d'un disjoncteur

Publications (2)

Publication Number Publication Date
EP3138113A1 EP3138113A1 (fr) 2017-03-08
EP3138113B1 true EP3138113B1 (fr) 2020-09-16

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP15728813.5A Active EP3138113B1 (fr) 2014-06-30 2015-06-05 Prévention de défauts d'alignement d'une barre d'entraînement d'un disjoncteur

Country Status (5)

Country Link
US (1) US10096444B2 (fr)
EP (1) EP3138113B1 (fr)
CN (1) CN106463299B (fr)
DE (1) DE102014212583A1 (fr)
WO (1) WO2016000907A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102017203208A1 (de) * 2017-02-28 2018-08-30 Siemens Aktiengesellschaft Kraftübertragungseinheit für einen Leistungsschalter
CN111696822B (zh) * 2020-06-24 2022-06-14 广东电网有限责任公司电力科学研究院 一种真空灭弧室及柱上开关

Citations (2)

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Publication number Priority date Publication date Assignee Title
US5597992A (en) * 1994-12-09 1997-01-28 Cooper Industries, Inc. Current interchange for vacuum capacitor switch
CN203339047U (zh) * 2013-03-20 2013-12-11 广东维能电气有限公司 腰支旋转式均压带接地屏蔽高压真空灭弧室固封极柱

Family Cites Families (15)

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US3189715A (en) * 1962-05-21 1965-06-15 Jennings Radio Mfg Corp Internal shield and seal structure for vacuum sealed switch envelope
US3261954A (en) 1965-01-11 1966-07-19 Joslyn Mfg & Supply Co Current interruption and separation electrode structure for vacuum switching apparatu
US3440377A (en) * 1966-08-08 1969-04-22 Allis Chalmers Mfg Co Removable shield means for vacuum switch bellows
US3594525A (en) * 1969-04-21 1971-07-20 Gen Electric Common parallel operating means for series-connected, laterally offset vacuum switches
US4061894A (en) * 1976-04-28 1977-12-06 General Electric Company Vacuum-type circuit interrupter with improved protection for bellows
US4443672A (en) * 1982-02-11 1984-04-17 International Telephone & Telegraph Corporation Low capacitance radio frequency switch
DE19814398C1 (de) * 1998-03-31 1999-12-30 Moeller Gmbh Elektrisches Schaltgerät, insbesondere elektromagnetisches Schaltgerät mit Vakuumschaltröhre
JP3930208B2 (ja) * 1999-10-07 2007-06-13 株式会社日立製作所 真空絶縁開閉装置
DE19959207C2 (de) * 1999-12-08 2001-10-18 Siemens Ag Vakuumschütz mit verschiebbarem Führungselement
FR2836277B1 (fr) * 2002-02-19 2004-04-16 Alstom Mecanisme de commande a ressorts pour disjoncteur a mouvement rectiligne
DE10207892B4 (de) * 2002-02-20 2004-02-05 Siemens Ag Vakuumschaltröhre mit einem Schaltkontaktstück
CN201075805Y (zh) 2007-08-04 2008-06-18 万德鸿 超大转矩低速变频轮毂电机
JP5297682B2 (ja) * 2008-04-24 2013-09-25 株式会社明電舎 真空遮断器
DE202011106188U1 (de) * 2011-09-30 2013-01-09 Fritz Driescher KG Spezialfabrik für Elektrizitätswerksbedarf GmbH & Co Schalterpoleinheit
EP2682974A1 (fr) * 2012-07-06 2014-01-08 ABB Technology AG Ensemble de tige poussoir destiné à un disjoncteur sous vide à moyenne tension

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5597992A (en) * 1994-12-09 1997-01-28 Cooper Industries, Inc. Current interchange for vacuum capacitor switch
CN203339047U (zh) * 2013-03-20 2013-12-11 广东维能电气有限公司 腰支旋转式均压带接地屏蔽高压真空灭弧室固封极柱

Also Published As

Publication number Publication date
WO2016000907A1 (fr) 2016-01-07
US10096444B2 (en) 2018-10-09
DE102014212583A1 (de) 2015-12-31
US20170133181A1 (en) 2017-05-11
CN106463299B (zh) 2019-09-27
EP3138113A1 (fr) 2017-03-08
CN106463299A (zh) 2017-02-22

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