EP4094281B1 - Dispositif de déconnexion et appareil de commutation de puissance de tension moyenne isolé par gaz protecteur - Google Patents

Dispositif de déconnexion et appareil de commutation de puissance de tension moyenne isolé par gaz protecteur

Info

Publication number
EP4094281B1
EP4094281B1 EP21708144.7A EP21708144A EP4094281B1 EP 4094281 B1 EP4094281 B1 EP 4094281B1 EP 21708144 A EP21708144 A EP 21708144A EP 4094281 B1 EP4094281 B1 EP 4094281B1
Authority
EP
European Patent Office
Prior art keywords
contact
heat
gas
protective
housing
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
EP21708144.7A
Other languages
German (de)
English (en)
Other versions
EP4094281A1 (fr
Inventor
Stefan Kern
Torben-Roland Buß
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
Siemens Corp
Original Assignee
Siemens AG
Siemens Corp
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, Siemens Corp filed Critical Siemens AG
Publication of EP4094281A1 publication Critical patent/EP4094281A1/fr
Application granted granted Critical
Publication of EP4094281B1 publication Critical patent/EP4094281B1/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
    • H01H1/00—Contacts
    • H01H1/62—Heating or cooling of 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
    • H01H33/666—Operating arrangements

Definitions

  • the current path narrows, resulting in high contact resistance. This, along with the high current, results in high power dissipation and generates high temperatures at the contact fingers and the fixed contact.
  • IEC 62271-1 stipulates for the contact fingers on pages 64 and 65 that when using smolder hexafluoride as a non-oxidizing gas (NOG, see "Point 5" on page 67) and an ambient temperature of maximum 40°C, the contacts may reach a maximum temperature of 115°C if the contacts are made of pure copper or are coated with silver or nickel. The ambient temperature must be taken into account here, because heat transfer is always a factor.
  • the object of the invention is to provide a separating device based on known separating devices which allows a comparatively high heat dissipation to the environment and at the same time can be manufactured cost-effectively.
  • the invention solves this problem by a separating device according to claim 1.
  • the disconnector is preferably designed for use in a medium-voltage power switchgear system.
  • the so-called primary distribution level for medium-voltage typically has voltages between 12 kV and 40.5 kV, which requires vacuum switching technology in such systems, for example.
  • Disconnectors are also used to ensure reliable galvanic isolation.
  • contact fingers arranged in pairs can be used.
  • anything from a single contact finger to five or more pairs of contact fingers can be used.
  • the first spring device can, for example, comprise a spiral spring or a disc spring.
  • a leaf spring can also be advantageously used.
  • the spring device pushes or pulls the contact and mating contact together in the ON position to ensure good electrical conductivity.
  • one spring device is used per contact or contact finger.
  • a single spring can be selected for all contacts.
  • the holding device positions the contacts within the housing and is rotatable, for example, in order to be able to assume the various switching positions.
  • the first spring device and/or the holding device are preferably formed from a non-magnetic material in order to to avoid additional heating and interference from magnetic fields and induced currents. Steel and iron are therefore generally ruled out, while copper, aluminum, or brass are suitable due to their comparatively low cost.
  • the holding device can, for example, be designed as a box or cage that surrounds the contacts or contact fingers and supports them springily.
  • the heat-conducting device is designed to create a pressure force between the holding device and the contact by means of a second spring device. This is advantageous because it ensures a connection with high thermal conductivity.
  • the second spring device is made of a non-magnetic material to avoid additional heating and interference from magnetic fields and induced currents. Steel and iron are therefore generally ruled out, while copper, aluminum, or brass are suitable due to their comparatively low cost.
  • the second spring device can, for example, comprise a coil spring or a disc spring. A leaf spring can also be used advantageously.
  • the heat-conducting device has a metallic contact material. Due to its high thermal conductivity, copper is preferably used, at least in part, for the heat-conducting device. Copper has the further advantage that it can be attached particularly cost-effectively using ultrasonic welding. Alternatively, aluminum or brass can be used, at least in part.
  • the holding means is rotatably mounted on the housing and by means of A drive device located outside the housing allows the switch to be moved to the earth, off, and on positions of the disconnecting device.
  • a drive device located outside the housing allows the switch to be moved to the earth, off, and on positions of the disconnecting device.
  • a motor can be provided for automatic control of the disconnecting device and/or a hand crank for manual operation.
  • the Figure 1 shows an excerpt of a known protective gas-insulated medium-voltage power switchgear with a fluid-tight metal housing 1 made of, for example, cast aluminum (AlSi10Mg), which is designed to be filled with an electrically insulating protective gas.
  • a busbar 2 is connected to a mating contact 7, which is essentially designed as a flat forged part.
  • the holding means 9 is essentially shoe-shaped; it tapers towards the sliding bearing or drive device 14.
  • the sole 15 is shaped to serve as a fastening for a box-shaped holding device 11, 12, 13, 14 for the eight contacts 6, which are designed as contact fingers with contact points 10 for the mating contact.
  • Each pair of contact fingers 6 is spaced apart by a gap bridged by two first spring devices 13, 14, each designed as a spiral spring. If the holding means 9 is rotated, the holding device 11 rotates with it and pushes the contact fingers 6 at their contact points 10 onto a mating contact.
  • the holding device 11 is essentially box-shaped and has two webs 12 at the end facing away from the contact points 10; it is made of cast aluminum (AlSi10Mg).
  • Figure 5 shows a first embodiment of a heat-conducting device 22, which has a first flat area 26, a bundle of stranded copper wires 23, and a terminal clamp 24.
  • the terminal clamp 24 reconnects the individual strands of the stranded wire bundle.
  • FIGS 6 and 7 show a schematic detailed view of the embodiment according to Figure 5
  • the contact finger 22 has a contact area 10 and a recess 33 on the longest edge of the substantially cuboid-shaped contact 22.
  • a second spring device is provided in the recess 33.
  • a non-magnetic, metallic spring plate preferably a copper spring plate 25—is arranged to clamp the copper stranded wire 22 against the inside of the cage or box of the holding device. Rivets 32 or screws are used to connect the copper spring plate 25 and the contact finger 22.
  • Copper stranded wire has a high thermal conductivity of approximately 370 W/(m*K). They are preferably attached to the attachment point 32 using the very cost-effective ultrasonic welding method. Alternatively, the more expensive method of electron beam welding can also be used.
  • copper lamella strips small current strips produced by resistance welding could alternatively be used, which are screwed together.
  • Figure 8 shows an alternative embodiment of the separating device in which the heat conducting device is firmly connected to the inside of the holding device with copper stranded wire 22 and spring plate 25.

Landscapes

  • Arc-Extinguishing Devices That Are Switches (AREA)
  • Gas-Insulated Switchgears (AREA)

Claims (10)

  1. Dispositif de sectionnement pour une installation de distribution de puissance de la moyenne tension à isolation par du gaz de protection comprenant
    au moins un contact (6), qui a, pour la constitution d'une force de poussée sur un contact (7) antagoniste, un premier dispositif (13, 16) à ressort, et comprenant
    un dispositif (11, 12) de maintien du contact (6),
    caractérisé en ce qu'
    il est constitué un dispositif (22, 23, 24, 25, 31, 32, 35) de conduction de la chaleur, qui pousse l'un sur l'autre le dispositif (11, 12) de maintien et le au moins un contact (6), afin de faciliter une évacuation de la chaleur des contacts à un boîtier de l'installation de distribution de puissance de la moyenne tension à isolation par du gaz de protection, dans lequel plusieurs contacts (6) sont constitués sous la forme de doigts de contact montés par paire, dans lequel il est constitué, entre les paires de doigts de contact, un intervalle de réception du contact (7) antagoniste, et en ce que
    le dispositif (22, 23, 24, 25, 31, 32, 35) de conduction de la chaleur est constitué pour produire, au moyen d'un deuxième dispositif (25) à ressort en un matériau essentiellement amagnétique, une force de poussée entre le dispositif (11, 12) de maintien et le contact (6), et en ce que
    le dispositif (22, 23, 24, 25, 31, 32, 35) de conduction de la chaleur a plusieurs conducteurs torsadés, qui sont au moins en partie en cuivre.
  2. Dispositif de sectionnement suivant la revendication 1, caractérisé en ce que le dispositif (22, 23, 24, 25, 31, 32, 35) de conduction de la chaleur est monté sur le dispositif (11, 12) de maintien.
  3. Dispositif de sectionnement suivant la revendication 1, caractérisé en ce que le dispositif (22, 23, 24, 25, 31, 32, 35) de conduction de la chaleur est monté sur le contact (6).
  4. Dispositif de sectionnement suivant l'une des revendications précédentes, caractérisé en ce que le dispositif (22, 23, 24, 25, 31, 32, 35) de conduction de la chaleur a du matériau essentiellement amagnétique.
  5. Dispositif de sectionnement suivant l'une des revendications précédentes, caractérisé en ce que le dispositif (6, 9, 10 à 16) de sectionnement est constitué sous la forme d'un dispositif de sectionnement à trois positions ayant les positions de commutation TERRE, OUVERT et FERMÉ, dans lequel dans la position de commutation FERMÉ, le au moins un contact (6) est poussé sur le contact (7) antagoniste.
  6. Installation de distribution de puissance de la moyenne tension à isolation par du gaz de protection comprenant un agencement de coupure sous vide et un dispositif (6, 9, 10 à 16) de sectionnement suivant l'une des revendications 1 à 5.
  7. Installation de distribution de puissance de la moyenne tension suivant la revendication 6, caractérisée en ce que l'installation de distribution de puissance de la moyenne tension a un boîtier (1) étanche au fluide, qui est constitué pour être rempli d'un gaz de protection isolant électriquement exempt d'hexafluorure de soufre.
  8. Installation de distribution de puissance de la moyenne tension suivant la revendication 6, caractérisée en ce que le dispositif (6, 9, 10 à 16) de sectionnement est, par un moyen (11) de maintien non conducteur de l'électricité et amagnétique, à distance du boîtier (1).
  9. Installation de distribution de puissance de la moyenne tension suivant la revendication 8, caractérisée en ce que le moyen (9) de maintien est constitué pour un transport de la chaleur du dispositif (11) de maintien au boîtier (1).
  10. Installation de distribution de puissance de la moyenne tension suivant l'une des revendications 6 à 9, caractérisée en ce que le moyen (11) de maintien est monté tournant sur le boîtier (1) et peut être déplacé au moyen d'un dispositif (14) d'entraînement monté à l'extérieur du boîtier (1), afin de régler les positions de commutation TERRE, OUVERT et FERMÉ du dispositif (6, 9, 10 à 16) de sectionnement.
EP21708144.7A 2020-03-12 2021-02-15 Dispositif de déconnexion et appareil de commutation de puissance de tension moyenne isolé par gaz protecteur Active EP4094281B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102020203190.8A DE102020203190B3 (de) 2020-03-12 2020-03-12 Trennvorrichtung und schutzgasisolierte Mittelspannungs-Leistungsschaltanlage
PCT/EP2021/053613 WO2021180424A1 (fr) 2020-03-12 2021-02-15 Dispositif de déconnexion et appareil de commutation de puissance de tension moyenne isolé par gaz protecteur

Publications (2)

Publication Number Publication Date
EP4094281A1 EP4094281A1 (fr) 2022-11-30
EP4094281B1 true EP4094281B1 (fr) 2025-08-27

Family

ID=74758751

Family Applications (1)

Application Number Title Priority Date Filing Date
EP21708144.7A Active EP4094281B1 (fr) 2020-03-12 2021-02-15 Dispositif de déconnexion et appareil de commutation de puissance de tension moyenne isolé par gaz protecteur

Country Status (3)

Country Link
EP (1) EP4094281B1 (fr)
DE (1) DE102020203190B3 (fr)
WO (1) WO2021180424A1 (fr)

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB569088A (en) * 1943-10-21 1945-05-03 Wright & Weaire Ltd Improvements relating to the contacts of interrupters or vibrators for electrical circuits
GB1125734A (en) * 1966-08-23 1968-08-28 Ass Elect Ind Improvements in or relating to switching devices
DE2547469A1 (de) * 1975-10-23 1977-04-28 Schaltbau Gmbh Stromabnehmer fuer stelltransformatoren
JPS57180013A (en) 1981-04-28 1982-11-05 Tokyo Shibaura Electric Co Contact for tap changer
DE102004056622B3 (de) * 2004-11-24 2006-01-05 Tyco Electronics Amp Gmbh Verfahren zur Herstellung einer Kontaktfeder, insbesondere einer Relaisfeder, für hohe Strombelastung
CN201134363Y (zh) 2007-12-29 2008-10-15 中国北车集团大同电力机车有限责任公司 隔离开关静触头组件
CN101383233B (zh) 2008-02-26 2010-09-08 上海华明电力设备制造有限公司 一种分接开关用的动触头
WO2011082528A1 (fr) 2010-01-08 2011-07-14 库柏电子科技(上海)有限公司 Contact mobile pour commutateur de charge immergé dans l'huile
EP3439009B1 (fr) 2017-08-03 2019-10-02 Nuventura GmbH Disjoncteur pour appareillage de commutation isolé au gaz

Also Published As

Publication number Publication date
EP4094281A1 (fr) 2022-11-30
DE102020203190B3 (de) 2021-08-05
WO2021180424A1 (fr) 2021-09-16

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