WO2021170330A1 - Moyen de commande électrique et procédé de commutation d'un moyen de commande électrique - Google Patents

Moyen de commande électrique et procédé de commutation d'un moyen de commande électrique Download PDF

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Publication number
WO2021170330A1
WO2021170330A1 PCT/EP2021/051812 EP2021051812W WO2021170330A1 WO 2021170330 A1 WO2021170330 A1 WO 2021170330A1 EP 2021051812 W EP2021051812 W EP 2021051812W WO 2021170330 A1 WO2021170330 A1 WO 2021170330A1
Authority
WO
WIPO (PCT)
Prior art keywords
contact
housing
electrical equipment
contact area
electrical
Prior art date
Application number
PCT/EP2021/051812
Other languages
German (de)
English (en)
Inventor
Frank Graskowski
Andreas Lawall
Holger Schumann
Original Assignee
Siemens Aktiengesellschaft
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 Aktiengesellschaft filed Critical Siemens Aktiengesellschaft
Publication of WO2021170330A1 publication Critical patent/WO2021170330A1/fr

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
    • H01H33/664—Contacts; Arc-extinguishing means, e.g. arcing rings
    • 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
    • H01H33/662—Housings or protective screens
    • H01H33/66207—Specific housing details, e.g. sealing, soldering or brazing
    • H01H2033/6623—Details relating to the encasing or the outside layers of the vacuum switch housings
    • 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
    • H01H33/662—Housings or protective screens
    • H01H33/66238—Specific bellows details

Definitions

  • the invention relates to electrical equipment according to the preamble of claim 1 and a method for switching electrical equipment according to claim 11.
  • Vacuum circuit breakers are electrical equipment in energy networks and, in the case of a three-phase design, have one vacuum chamber per phase, which is insulated from the environment in a fluid-tight manner.
  • vacuum interrupter refers to the vacuum chambers and other components of the circuit breaker. Gases are no longer present in the interior of the vacuum chamber, or only at a very low gas pressure.
  • two electrical contacts are against each other and form a very good electrical conductive connection, with a permanently installed ter and relative to a housing of the vacuum chamber not ver slidable contact is referred to as a fixed contact.
  • Another common name for the contacts is tube contacts.
  • the other contact can be moved relative to the housing of the vacuum chamber and is referred to as a moving contact.
  • the movable contact can be moved away from the fixed contact electromagnetically or by a mechanism, a contact spacing of typically only a few mm being formed. Furthermore, the movable contact is typically pressed onto the fixed contact by a contact spring.
  • Such vacuum circuit breakers are for example for the medium voltage range, for example between 7 and 52 kV, from the Product catalog "SION vacuum circuit-breakers 3AE5 and 3AE1 medium-voltage devices", catalog HG 11.02, Siemens AG 2018, item no. EMLP-Cl0162-00-0ODE.
  • the components of the circuit-breakers are explained on pages 8 and 9 of the brochure .
  • the object of the invention is to provide electrical equipment that enables comparatively low production costs and, at the same time, comparatively long lifetimes.
  • the invention solves this problem by means of an electrical operating means according to claim 1.
  • the electrical equipment can for example have a vacuum circuit breaker or a contactor or a load switch.
  • the invention is based on the knowledge that in the case of vacuum chambers the fixed contact is formed from a metal and is connected to an electrically non-conductive housing of the vacuum chamber, which for example consists at least partially of a ceramic material.
  • an electrically non-conductive housing of the vacuum chamber which for example consists at least partially of a ceramic material.
  • the material of the Festkon contact in particular for a contact material such as copper-chromium alloys and attachment to a flange, significant costs arise based on the total manufacturing costs of the circuit breaker.
  • this complex construction is complex and therefore expensive to manufacture with a non-displaceable anchoring of the fixed contact in the vacuum chamber.
  • it is therefore proposed to omit the fixed contact and instead to switch the movable contact directly to an inner wall of the housing. This saves considerable costs because there is no fixed contact (and possibly a so-called contact disk).
  • the term "direct” refers to the fact that there are no further components between the movable contact and the contact area of the housing. In particular, a counter contact or fixed contact is no longer required.
  • a flange made of a conductive material that is already present on the vacuum chamber.
  • at least a portion of copper can be used for the flange.
  • another metal e.g. at least part of the steel, can be used for the movable contact.
  • the vacuum chamber can at least partially have a cylindrical shape.
  • An electrically isolated and fluid-tight opening can be provided through which the contact is introduced into the vacuum chamber.
  • a bellows can be used, ie a seal made of a compressible, flexible and fluid-tight material.
  • a bellows has the advantage that it is easier to produce fluid tightness than with a bushing, which increases the service life.
  • the contact can have a cylindrical contact surface which, when the contact is pressed onto the housing, forms a large and electrically highly conductive surface.
  • the electrical equipment has a circuit breaker.
  • the housing has a flange and a side wall, wherein the contact area is arranged on an inner side of the flange.
  • a cover or other closure of the housing which limits the movement of the contact, is also to be regarded as a flange. This is an advantage because a conventional and inexpensive flange, for example made of copper, can be used.
  • the housing has a flange and a side wall, the contact area being arranged on an inside of the side wall.
  • the housing is constructed in one piece.
  • a cup-shaped design made of a metal such as copper or aluminum is used.
  • the electrical insulation from the contact can be ensured, for example, by an at least partially electrically non-conductive bellows.
  • individual bellows folds could be formed in a non-conductive manner.
  • the contact area has at least a portion of an electrically conductive material. This is an advantage because it provides an electrically conductive connection through the housing to a first electrical connection of the line switch.
  • sections of the inner sides of the housing that are not assigned to the contact area have, at least in part, an electrically non-conductive material.
  • a bellows is arranged in a fluid-tight manner on the side of the vacuum chamber facing the movable contact and connects the housing to the movable contact.
  • the bellows is designed to be electrically non-conductive. This is an advantage because electrical insulation is ensured between the housing and the contact.
  • a plastic can be used for the bellows in a different manufacturing process with lower temperatures than in the case of the closure soldering.
  • a separating device is provided, which is arranged on the movable contact and forms out to move the contact away from the housing while forming an electrically insulating separating distance.
  • the separating device has, for example, a spring mechanism that is driven or pulled up, for example, by a motor, in particular an electric motor, and enables the contact to be moved away. Alternatively, the contact can be moved away by means of an electromagnet.
  • the separation distance is typically only a few mm long and the electrical contacts are spaced apart from one another. The separation distance is, for example, shorter than 100 mm for the high voltage range, preferably shorter than 50 mm and even more preferably the medium voltage range below 52 kV nominal voltage shorter than 25 mm.
  • the separating device has a kinematic chain which translates a rotary movement driven by an electrical motor into an axial movement of the contact relative to the housing.
  • the movement axis is perpendicular to the contact surface of the contact and the housing.
  • the separating device has an insulator. This is an advantage because it ensures that no short circuit can occur via the isolating device to earth.
  • the equipment is designed for switching low voltage below 7 kV. This is an advantage because at these voltages, switching technology can be provided comparatively inexpensively with the electrical equipment.
  • the equipment is designed for switching medium voltage between 7 kV and 52 kV. This is an advantage because at these voltages, the electrical equipment can be used to quickly extinguish an arc when it is disconnected.
  • the equipment is designed for switching high voltage above 52 kV. This is an advantage because the use of vacuum switching technology is also becoming more and more interesting in the high-voltage area, since no climate-damaging protective gas such as sulfur hexafluoride should be used.
  • Another object of the invention is to provide a method for switching electrical equipment, with which comparatively low manufacturing costs and, at the same time, comparatively long lifetimes are made possible.
  • FIG. 1 a preferred embodiment of an electrical equipment according to the invention.
  • a first contact piece 4 has, for example, a contact pressure device (not shown) which is equipped, for example, with a spring device.
  • a contact pressure device for example, a spiral spring or a disc spring can be used.
  • the vacuum chamber 2 has a housing 5, 6 with a flange 5 made of copper and a side wall 6 made of ceramic. the Side wall 6 and the flange 5 are essentially cylindrical.
  • the side of the vacuum chamber 2 opposite the flange 5 is sealed with a bellows 9 in a fluid-tight manner.
  • the bellows 9 has preformed, flexible lamellae and is attached to the electrical contact 7 so as to be non-displaceable (for example by means of a soldered connection 16).
  • a vacuum 8 Inside the Vakuumkam mer 2 there is a vacuum 8, ie gases are no longer present or only in very low concentrations.
  • the contact 7 is connected to a second suspension 11, which at the same time provides a second electrical connection.
  • the contact 7 can be moved away from the housing via a separating device 13, 14, an electrical insulator 13 being connected between an actuator 15 and the contact 7.
  • the design shown uses an electric motor 15 and a kinematic chain that translates the rotary movement of the Mo sector into a linear movement of the contact 7.
  • a linear motor can also be used to advantage in order to directly provide a hub for the contact.
  • the figure shows a closed state of the switch, in which the contact 7 and the electrically conductive flange 5 are pressed onto one another in a contact area 10.

Landscapes

  • High-Tension Arc-Extinguishing Switches Without Spraying Means (AREA)
  • Gas-Insulated Switchgears (AREA)

Abstract

L'invention concerne un moyen de commande électrique (1) comprenant une chambre à vide (2) pourvue d'un boîtier (5, 6) dans lequel est disposé un contact électrique mobile (7). L'invention est caractérisée en ce que le contact (7) est conçu pour être pressé directement sur une zone de contact (10) du boîtier pour établir une liaison électroconductrice. L'invention concerne en outre un procédé de commutation d'un disjoncteur.
PCT/EP2021/051812 2020-02-27 2021-01-27 Moyen de commande électrique et procédé de commutation d'un moyen de commande électrique WO2021170330A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102020202530.4A DE102020202530A1 (de) 2020-02-27 2020-02-27 Elektrisches Betriebsmittel und Verfahren zum Schalten eines elektrischen Betriebsmittels
DE102020202530.4 2020-02-27

Publications (1)

Publication Number Publication Date
WO2021170330A1 true WO2021170330A1 (fr) 2021-09-02

Family

ID=74586979

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2021/051812 WO2021170330A1 (fr) 2020-02-27 2021-01-27 Moyen de commande électrique et procédé de commutation d'un moyen de commande électrique

Country Status (2)

Country Link
DE (1) DE102020202530A1 (fr)
WO (1) WO2021170330A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB677776A (en) * 1949-02-11 1952-08-20 Desmond Hubert Gibson Wood Improvements in metallic bellows and apparatus incorporating metallic bellows
DE19933111A1 (de) * 1999-07-15 2001-01-18 Abb Patent Gmbh Vakuumkammer und Verfahren zur Herstellung der Vakuumkammer
EP1119010A1 (fr) * 1998-10-02 2001-07-25 Hitachi, Ltd. Interrupteur a vide et commutateur a vide utilisant l'interrupteur a vide
EP3493235A1 (fr) * 2017-12-04 2019-06-05 Schneider Electric Industries SAS Ampoule à vide pour appareil électrique de coupure

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2036099C3 (de) 1970-07-16 1974-08-08 Siemens Ag, 1000 Berlin Und 8000 Muenchen Vakuumleistungsschalter
DD258676A1 (de) 1985-12-10 1988-07-27 Berlin Treptow Veb K Vakuumschaltkammer fuer niederspannungsvakuumschuetze
DE4011194A1 (de) 1990-04-04 1990-08-02 Slamecka Ernst Vakuumschaltkammer
EP2421017B1 (fr) 2010-08-13 2017-10-04 ABB Schweiz AG Agencement de disjoncteur à moyenne tension activé par un support de transmission spécial

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB677776A (en) * 1949-02-11 1952-08-20 Desmond Hubert Gibson Wood Improvements in metallic bellows and apparatus incorporating metallic bellows
EP1119010A1 (fr) * 1998-10-02 2001-07-25 Hitachi, Ltd. Interrupteur a vide et commutateur a vide utilisant l'interrupteur a vide
DE19933111A1 (de) * 1999-07-15 2001-01-18 Abb Patent Gmbh Vakuumkammer und Verfahren zur Herstellung der Vakuumkammer
EP3493235A1 (fr) * 2017-12-04 2019-06-05 Schneider Electric Industries SAS Ampoule à vide pour appareil électrique de coupure

Also Published As

Publication number Publication date
DE102020202530A1 (de) 2021-09-02

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