EP2351060A1 - Ampoule à vide comportant des bornes de connexion à barres fixes sur deux faces - Google Patents

Ampoule à vide comportant des bornes de connexion à barres fixes sur deux faces

Info

Publication number
EP2351060A1
EP2351060A1 EP09752343A EP09752343A EP2351060A1 EP 2351060 A1 EP2351060 A1 EP 2351060A1 EP 09752343 A EP09752343 A EP 09752343A EP 09752343 A EP09752343 A EP 09752343A EP 2351060 A1 EP2351060 A1 EP 2351060A1
Authority
EP
European Patent Office
Prior art keywords
contact piece
contact
vacuum
vacuum switch
clamping
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
EP09752343A
Other languages
German (de)
English (en)
Other versions
EP2351060B1 (fr
Inventor
Mathias Anheuer
Jörg DORN
Andreas Fartuschnja
Thomas KÜBEL
Peter Lell
Andreas Zenkner
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 EP2351060A1 publication Critical patent/EP2351060A1/fr
Application granted granted Critical
Publication of EP2351060B1 publication Critical patent/EP2351060B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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
    • H01H33/6606—Terminal arrangements
    • 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
    • H01H1/00—Contacts
    • H01H1/58—Electric connections to or between contacts; Terminals
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/58—Electric connections to or between contacts; Terminals
    • H01H1/5833—Electric connections to or between contacts; Terminals comprising an articulating, sliding or rolling contact between movable contact and terminal
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H39/00—Switching devices actuated by an explosion produced within the device and initiated by an electric current
    • H01H39/004—Closing switches
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H79/00—Protective switches in which excess current causes the closing of contacts, e.g. for short-circuiting the apparatus to be protected

Definitions

  • the invention relates to a vacuum switch with a vacuum chamber, in which a vacuum prevails and in which a switching contact is arranged, wherein the switching contact a permanently connected to the vacuum chamber fixed contact, which is in electrical contact with a fixed contact terminal, and with respect to the fixed contact piece movable guided BewegCount mutual, which is arranged in a disconnected position at a distance from the fixed contact piece and contacted in a contact position, the fixed contact, a drive unit for generating a drive movement, connected to the drive unit and the BewegWalletffle switching mechanism, which extends up to the BewegTag FIFA electrically conductive conductor portion, and connecting means, which connect a Be.
  • a vacuum prevails and in which a switching contact is arranged
  • the switching contact a permanently connected to the vacuum chamber fixed contact, which is in electrical contact with a fixed contact terminal, and with respect to the fixed contact piece movable guided BewegCount, which is arranged in a disconnected position at a distance from the fixed contact piece and contacted in a contact position, the fixed contact
  • Vacuum switches are used in particular in medium voltage, ie in a voltage range between IkV and 52kV. Also in this voltage range occur in particular when switching high power arcs, which are drawn when disconnecting the switch contacts. To erase these arcs at a current zero crossing the switch contacts are arranged in a vacuum chamber in which a
  • Vacuum prevails.
  • a fixed contact permanently connected to the vacuum chamber and a movable contact guided in this respect are generally provided.
  • the moving contact can be used both as a swiveling but also be designed as a lifting contact, which is opposite to the fixed contact in a longitudinal direction and is movably guided in this longitudinal direction.
  • a bellows made of metal is provided, which is connected on the one hand to the vacuum chamber and on the other hand to the moving contact piece.
  • the drive movement of the vacuum switch is generated by a drive unit, which is realized for example as a spring accumulator drive or as a magnetic drive.
  • the drive movement generated by the drive unit is introduced via a switching mechanism in the BewegCount consultancy.
  • the switching mechanism comprises said switching rod, which has a conductive portion which extends towards the BewegCount- piece.
  • a BewegMapan- circuit terminal connecting means are provided, which are realized according to the prior art as a sliding contact, tape contact or roller contact.
  • a ribbon contact is used which has a flexible electrically conductive
  • the flexible connection means have a reduced current carrying capacity compared to the remaining components of the current path, so that, in particular at high short-circuit currents, a high resistance which is no longer acceptable for many applications occurs.
  • a complex connection technique for the flexible connection means is required, since it leads to high speeds during rapid switching. bending or bending forces.
  • flexible connection means are expansive.
  • Cone-shaped contacts are also known from the prior art. Cone contacts are used according to the prior art in switches with two contact arrangements. For example, when the switch is turned on, the cone contact closes first, resulting in the expected arc at the cone contact. The second contact arrangement follows the first closing contact arrangement, so that it can be closed without arcing. Because of their better conductivity, when both contacts are closed, the current flows across the lagging second contact arrangement. However, damage to the second contact arrangement as a result of the arc is avoided.
  • the object of the invention is to provide a vacuum switch of the type mentioned, which is compact and low in complexity and especially at high Einschaltgeschwindig- speeds provides a safe current path with a high current carrying capacity between the terminals of the vacuum switch.
  • a vacuum switch is provided which has a clamping contact instead of the usual connection means. Due to the clamping contact, it is possible to provide a vacuum switch with only solid busbars. The switching mechanism is therefore free of a flexible conductor section, rolling or sliding contacts that close the switch contact can cause mechanical problems when fast. According to the invention it is therefore possible to close the vacuum switch quickly.
  • the vacuum switch is also compact and can be used without problems even in small installation spaces.
  • the clamping contact has two contact pieces.
  • the counter-clamping contact of the terminal contact is mechanically fixed to the Bewegromean gleichklemme and thus arranged stationary.
  • the second contact piece of the clamping contact namely the Ein thoroughlyklemm toast-contact piece is fixedly mounted on the switching mechanism, wherein between the electrically conductive conductor portion and the Ein thoroughlyklemmkon- contact piece an electrical connection is provided. In this way, the BewegCount proceedings is also electrically connected to the Ein thoroughlyklemmMessage Stahl.
  • the clamping contact leads the switch contact when closing the vacuum switch ahead of time. According to this advantageous further development, it is ensured that no arc arises outside the vacuum chamber.
  • the Ein thoroughlyklemmtem Gi is so with the Switching mechanism connected so that when jamming the contacts of the terminal contact the BewegCount Gi is slowed down. The impact on the fixed contact piece is therefore less violent according to this expedient development of the invention.
  • the drive unit is a pyrotechnic force element, wherein an ignition circuit is provided for triggering the pyrotechnic force element.
  • Pyrotechnic power elements allow a particularly fast closing of the vacuum switch.
  • high Einschalter be generated with a violent opening of the moving contact in the wake.
  • fertil can also come to wedging of the switching contact as a result of the high impact forces.
  • the vacuum switch can therefore only be switched once and then has to be replaced.
  • the pyrotechnic drive has a displacement element, which is displaced explosively by a distance as a result of triggering.
  • the switching mechanism is realized as extending in a longitudinal direction and connected to the displacement element shift rod, wherein the displacement element is set up to trigger the pyrotechnic drive for holding the BewegCounts foundedes in its disconnected position.
  • the switching contact is designed as a so-called HubCount. In other words, the moving contact is held at the end of a switching rod protruding into the vacuum chamber.
  • the BewegCount commonly the fixed contact piece in the longitudinal direction opposite, in which also extends the shift rod.
  • the pyrotechnic drive At the end of the switching contact facing away from the moving contact piece Rod is located the pyrotechnic drive, wherein the shift rod is mechanically connected to the displacement element, which is for example designed pin-shaped and arranged in alignment with the shift rod.
  • the pyrotechnic drive is oriented such that when the pyrotechnic force element is ignited the displacement element is displaced toward the fixed contact in the longitudinal direction. Due to the rigid connection between the displacement element and moving contact piece by means of the switching rod, there is a shift of the moving contact piece in the direction of the fixed contact piece.
  • the Ein SwitzerlandklemmCloud scholar is pressed into the counter clamping contact piece, whereby the current path between the terminals of the vacuum switch is closed.
  • the displacement element Before the ignition of the pyrotechnic force element, the displacement element provides a holding force that precludes the closing of the switching contact. Due to the pressure difference in the interior of the vacuum chamber and the outside atmosphere, a continuous closing force acts, which drives the moving contact piece onto the fixed contact piece. The opposite is the holding force of the displacement element.
  • positioning means are provided for adjusting the spatial position of the displacement element and thus the distance of the Bewegumble- piece with respect to the fixed contact piece.
  • positioning means are, for example, simple positioning screws, with which the position of the pyrotechnic drive unit and thus of the displacement element in a common holding frame is changeable.
  • the clamping contact is a cone contact, which has a cone-shaped Einklemm.
  • the Einklemm. is for example on the cylindrical switching rod attached ring which increases continuously against the switching movement in its circumference, so that in cross-section a wedge-shaped Einklemm.
  • the Einklemm. is arranged loosely on the shift rod, wherein when switching on the switch results in a clamping fit of the Einklemm.
  • the insertion clamp contact piece can also be firmly connected to the switching rod, for example by adhesive, welding, screwing or shrinking.
  • the clamping contact piece is already loosely attached to the counter-clamping contact piece in the disconnected position. In this way it is ensured that the terminal contact leads the switch contact in any case in time.
  • the invention also relates to an inverter valve for converting an electric current or an electrical voltage with a series circuit of bipolar submodules, each submodule having at least one energy store and one power supply. comprising a semiconductor circuit, with which the voltage dropping across the energy store or a zero voltage can be generated at the terminal of the associated submodule, and wherein each submodule is assigned bridging means for bridging the submodule in the event of a fault.
  • Such converter valves have already become known under the term multi-level converter.
  • Such converter valves are successfully applicable in the field of energy transmission and energy distribution, so that there is an ever-increasing demand for such converter valves.
  • it makes sense to bridge the submodule quickly, so that the operation of the converter valve with the remaining submodules can be continued further.
  • the object of the invention is therefore also to provide such a converter valve, which can be safely, reliably and quickly bridged.
  • the invention solves this problem with bridging means comprising a vacuum switch according to the aforementioned type.
  • the power semiconductor circuit for generating a voltage at the terminals of each submodule is expediently arranged so that the voltage dropping across the energy store is inverse.
  • both the voltage drop across the energy store, for example a capacitor, and the voltage inverse thereto can be generated by the power semiconductor circuit.
  • the prerequisite for this is that energy storage and power semiconductor switch form a so-called full bridge circuit, which can also be referred to as H-bridge.
  • half-bridge circuits are also possible within the scope of the invention.
  • Figure shows an embodiment of the vacuum switch according to the invention in a cross-sectional view.
  • the figure shows a cross-sectional view of an embodiment of the vacuum switch according to the invention 1.
  • the vacuum switch 1 has a figured in the figure, not shown switching contact in a vacuum chamber 2.
  • the vacuum interrupter chamber has a ceramic tube which extends between the contacts and acts as an insulator.
  • In the vacuum chamber 2 projects into a fixed contact pin 3, which carries at its arranged in the vacuum chamber 2 end of the invisible fixed contact piece.
  • In the longitudinal direction of the fixed contact piece is the BewegCount founded, which is supported by the free end of a shift rod 4, which forms the switching mechanism of the vacuum switch 1.
  • the switching rod 6 At its end 5, which is repelled by the loading contact piece, the switching rod 6 is firmly connected to a displacement element 6 of a pyrotechnic drive 7.
  • Reference symbol 8 schematically illustrates the evaluation electronics of a control unit.
  • a retaining strip 18 which extends between the pole heads and consists of an insulating material, for example of a glass fiber reinforced plastic.
  • the vacuum Chamber 2 and the fixed contact pin 3 via holding means 9 also stationary with respect to the support frame 8 is arranged.
  • Contact means 10 continue to provide an electrical connection of the fixed contact pin 3 and thus the fixed contact piece with a fixed contact terminal 11th
  • the shift rod 4 is formed continuously conductive in the embodiment shown.
  • a clamping contact 12 is used for electrical connection of the shift rod 4 and thus the figured not BewegCount réellees with a permanently ver Kunststoff BewegTypean gleichklemme 13.
  • the longitudinally movable and simultaneously vacuum-tight connection of the shift rod 4 with the vacuum chamber 2 is only schematically indicated metal bellows 14.
  • the clamping contact 12 includes an Ein thoroughlyklemm toasting 16 and a complementary form complementary counter-clamping contact piece 17.
  • the Ein Germanyklemmtitle securities 16 is provided conically, so that it is shown in the cross-sectional view shown as a wedge.
  • the figuratively illustrated vacuum chamber 2 is used to bridge a submodule of an inverter valve, which has a series circuit of identically constructed bipolar Submo- modules.
  • a submodule fault high short-circuit currents occur in the submodule with arcing in the wake.
  • the vacuum switch 1 is closed.
  • first of all the short-circuit current is detected by sensors (not shown) in the submodule arranged parallel to the vacuum switch 1.
  • the voltage can also be measured and supplied to said control unit.
  • the control unit sends an ignition signal to the pyrotechnic force element 7. It comes to the explosive displacement of the displacement element 7 and thus the shift rod 4.
  • the shift rod 4 in the direction of arrow 15, ie in the longitudinal direction, moved.
  • there is also a firm jamming of the Ein IndustriesklemmWallet publishedes with the counter-clamping contact piece, wherein an electrical contact is provided. If the moving contact piece contacts the fixed contact piece, the current path between the fixed contact connection terminal 11 and the moving contact connection terminal 13 is closed.

Abstract

L'invention concerne une ampoule à vide (1) comportant une chambre à vide (2), dans laquelle règne le vide et dans laquelle est monté un contact de commutation qui comporte un élément de contact fixe, relié de manière fixe à la chambre à vide (2) et en contact électrique avec une borne de connexion de contact fixe (11), ainsi qu'un élément de contact mobile relativement à l'élément de contact fixe, cet élément de contact mobile étant espacé de l'élément de contact fixe en position de séparation et en contact avec l'élément de contact fixe en position de contact. L'ampoule à vide comprend également une unité d'entraînement (7) destinée à produire un mouvement d'entraînement, un mécanisme de commutation (4) relié à l'unité d'entraînement (7) et à l'élément de contact mobile, ce mécanisme comprenant un segment électriquement conducteur s'étendant jusqu'à l'élément de contact mobile, ainsi que des moyens de connexion qui, en position de contact, relient électriquement une borne de connexion de contact mobile (13) avec l'élément de contact mobile. L'invention vise à créer une ampoule à vide à la fois compacte et simple, qui présente, en particulier lors de grandes vitesses de fonctionnement, une voie de courant fiable à haute intensité maximale admissible entre les bornes de connexion de l'ampoule à vide. A cet effet, les moyens de connexion comportent un contact de serrage (16,17) qui présente un élément de contact de serrage d'insertion (16) relié au segment conducteur du mécanisme de commutation (4) et un élément de contact de serrage antagoniste (17) relié fixement à la chambre à vide (2) et en liaison électrique avec la borne de connexion de contact mobile (13), ces éléments de contact étant disposés l'un par rapport à l'autre de façon que l'élément de contact de serrage d'insertion (16) soit serré de manière électriquement conductrice avec l'élément de contact de serrage antagoniste (17) par le mouvement d'entraînement.
EP09752343.5A 2008-11-26 2009-11-10 Ampoule à vide comportant des bornes de connexion à barres fixes sur deux faces Active EP2351060B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102008059670A DE102008059670B3 (de) 2008-11-26 2008-11-26 Vakuumschalter mit beidseitig fest verschienten Anschlussklemmen
PCT/EP2009/064906 WO2010060790A1 (fr) 2008-11-26 2009-11-10 Ampoule à vide comportant des bornes de connexion à barres fixes sur deux faces

Publications (2)

Publication Number Publication Date
EP2351060A1 true EP2351060A1 (fr) 2011-08-03
EP2351060B1 EP2351060B1 (fr) 2016-08-03

Family

ID=41571352

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09752343.5A Active EP2351060B1 (fr) 2008-11-26 2009-11-10 Ampoule à vide comportant des bornes de connexion à barres fixes sur deux faces

Country Status (10)

Country Link
US (1) US8859927B2 (fr)
EP (1) EP2351060B1 (fr)
KR (1) KR101660550B1 (fr)
CN (1) CN102227797B (fr)
BR (1) BRPI0921994B8 (fr)
DE (1) DE102008059670B3 (fr)
ES (1) ES2601217T3 (fr)
PL (1) PL2351060T3 (fr)
RU (1) RU2516337C2 (fr)
WO (1) WO2010060790A1 (fr)

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CN208433908U (zh) 2015-05-28 2019-01-25 西门子公司 电压源换流器模块和换流器
CN105428150B (zh) * 2015-12-21 2017-11-21 华仪电气股份有限公司 一种双向推进隔离开关
KR101870016B1 (ko) * 2016-02-16 2018-07-23 엘에스산전 주식회사 바이패스 스위치
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JP7242905B2 (ja) * 2019-05-24 2023-03-20 エルエス、エレクトリック、カンパニー、リミテッド バイパススイッチ
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Also Published As

Publication number Publication date
US8859927B2 (en) 2014-10-14
RU2516337C2 (ru) 2014-05-20
WO2010060790A1 (fr) 2010-06-03
CN102227797A (zh) 2011-10-26
KR101660550B1 (ko) 2016-09-27
PL2351060T3 (pl) 2017-02-28
US20110226740A1 (en) 2011-09-22
CN102227797B (zh) 2014-03-19
RU2011126217A (ru) 2013-01-10
KR20110091520A (ko) 2011-08-11
DE102008059670B3 (de) 2010-06-17
BRPI0921994B1 (pt) 2019-09-03
EP2351060B1 (fr) 2016-08-03
ES2601217T3 (es) 2017-02-14
BRPI0921994A2 (pt) 2016-01-05
BRPI0921994B8 (pt) 2023-04-25

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