EP4383306B1 - Unité d'interrupteur pour dispositif à haute ou moyenne tension isolé par gaz - Google Patents

Unité d'interrupteur pour dispositif à haute ou moyenne tension isolé par gaz

Info

Publication number
EP4383306B1
EP4383306B1 EP22212641.9A EP22212641A EP4383306B1 EP 4383306 B1 EP4383306 B1 EP 4383306B1 EP 22212641 A EP22212641 A EP 22212641A EP 4383306 B1 EP4383306 B1 EP 4383306B1
Authority
EP
European Patent Office
Prior art keywords
guiding element
flow guiding
heating
interrupter unit
heating channel
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
EP22212641.9A
Other languages
German (de)
English (en)
Other versions
EP4383306A1 (fr
Inventor
Paulo Cristini
Bernardo Galletti
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.)
Hitachi Energy Ltd
Original Assignee
Hitachi Energy Ltd
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 Hitachi Energy Ltd filed Critical Hitachi Energy Ltd
Priority to EP22212641.9A priority Critical patent/EP4383306B1/fr
Priority to PCT/EP2023/084867 priority patent/WO2024121374A1/fr
Publication of EP4383306A1 publication Critical patent/EP4383306A1/fr
Application granted granted Critical
Publication of EP4383306B1 publication Critical patent/EP4383306B1/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
    • H01H33/70—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid
    • H01H33/72—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid having stationary parts for directing the flow of arc-extinguishing fluid, e.g. arc-extinguishing chamber
    • H01H33/74—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid having stationary parts for directing the flow of arc-extinguishing fluid, e.g. arc-extinguishing chamber wherein the break is in gas
    • 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
    • H01H33/70—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid
    • H01H33/98—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being initiated by an auxiliary arc or a section of the arc, without any moving parts for producing or increasing the flow
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
    • H01H2009/305—Means for extinguishing or preventing arc between current-carrying parts including means for screening for arc gases as protection of mechanism against hot arc gases or for keeping arc gases in the arc chamber
    • 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
    • H01H33/53—Cases; Reservoirs, tanks, piping or valves, for arc-extinguishing fluid; Accessories therefor, e.g. safety arrangements, pressure relief devices
    • H01H33/56—Gas reservoirs
    • H01H2033/566—Avoiding the use of SF6
    • 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
    • H01H33/70—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid
    • H01H33/7015—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid characterised by flow directing elements associated with contacts
    • H01H33/7023—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid characterised by flow directing elements associated with contacts characterised by an insulating tubular gas flow enhancing nozzle

Definitions

  • the invention relates to an interrupter unit for a gas-insulated high or medium voltage device.
  • the invention relates to a gas-insulated high or medium voltage device comprising the above interrupter unit and further an arc extinguishing gas.
  • High or medium voltage devices such as circuit breakers and switchgears are essential for the protection of technical equipment, especially in the high voltage range.
  • circuit breakers are predominantly used for interrupting a current, when an electrical fault occurs.
  • circuit breakers have the task of opening arcing contacts, quench an arc, and keeping the arcing contacts apart from one another in order to avoid a current flow even in case of high electrical potential originating from the electrical fault itself.
  • Circuit breakers may break medium to high short circuit currents of typically 1 kA to 80 kA at medium to high voltages of 12 kV to 72 kV and up to 1200 kV.
  • high or medium voltage devices accommodate high-voltage conductors such as conductors to which a high voltage is applied.
  • Some high or medium voltage devices namely gas-insulated high or medium voltage devices comprise an insulation gas, for example sulphur hexafluoride, in order to shield and insulate the high-voltage conductor from other component and/or to improve quenching of an arc, when operating arcing contacts.
  • an insulation gas for example sulphur hexafluoride
  • the insulation gas is used for extinguishing the arc generated in an arcing region between the arcing contacts when a fault current is to be interrupted and is thus also called arc extinguishing gas.
  • the arcing region is typically surrounded by an insulating nozzle.
  • the nozzle typically also serves for guiding a stream of the insulation gas for extinguishing, or blowing off, the arc.
  • the arc extinguishing gas is typically guided by a dedicated passage in the nozzle, also called heating channel, which ends close to the arcing region.
  • the arc extinguishing gas is guided directly onto the developing arc.
  • Sulphur hexafluoride is widely used as arc extinguishing gas, as it is known for its high dielectric strength and thermal interruption capability.
  • SF 6 might have some environmental impact when released into the atmosphere, in particular due to its relatively high global warming potential and its relatively long lifetime in the atmosphere.
  • Document DE 23 26 650 A1 describes a compressed gas switch with at least one switching path, which contains at least one hollow, nozzle-shaped contact piece, with the switching path being supplied with a flowing, gaseous extinguishing agent by means of a channel which is formed as an annular channel between the contact piece and a shell comprising the latter, using elements that disrupt the laminar flow and generate vortex flow, wherein the elements are arranged in the immediate vicinity of the mouth of the nozzle-shaped switching piece, viewed in the direction of flow.
  • the interrupter unit 10 comprises in a transition region 24 of the heating volume 20 to the heating channel 18 a flow guiding element 26.
  • a cross section of the flow guiding element 26 along a plane comprising the switching axis 16, comprises a circle.
  • connection of the heating channel 18 to the heating volume 20 is not designed such that a sharp corner 28 is formed. Instead, a fillet 42 is formed at the connection. Furthermore, the flow guiding element 26 is partially arranged within the heating channel 18 and also partially arranged within the region of the fillet 42.
  • FIG. 3 schematically shows a portion of an interrupter unit 10 of a high or medium voltage device, according to another preferred embodiment of the invention.
  • the interrupter unit 10 of this embodiment is also similar to the interrupter unit 10 of the embodiment in figure 1 , hence in the following only the differences are described:
  • the flow guiding element 26 bypasses part of the high PTFE content arc extinguishing gas entering in the heating volume 20, deflecting it towards an outer surface of the heating volume 20. Consequently, the part of the high PTFE content arc extinguishing gas traveling along the sidewall 34 closer to the switching axis 16 penetrates less into the heating volume 20 thus reducing its mixing with the arc extinguishing gas already present therein and having a low PTFE content.
  • arc extinguishing gas having a high PTFE content flows into the arcing region 22 in the subsequent flow reversal phase, which in turn improves the thermal interruption performance of the interrupter unit 10.

Landscapes

  • Circuit Breakers (AREA)

Claims (15)

  1. Unité d'interrupteur (10) pour un dispositif haute ou moyenne tension isolé des gaz comprenant un premier contact d'arc (12) et un second contact d'arc (14), dans laquelle au moins des contacts d'arc (12,14) peut être déplacé de manière axiale le long d'un axe de commutation (16), un canal de chauffage (18) destiné à guider un gaz extincteur d'arc depuis un volume de chauffage (20) vers une région d'arc (22) formée entre le premier contact d'arc (12) et le second contact d'arc (14),
    dans laquelle le canal de chauffage (18) est formé entre une buse auxiliaire (40) et une buse isolante (38), la buse auxiliaire (40) entourant au moins partiellement l'un des contacts d'arc (12, 14),
    dans laquelle l'unité d'interrupteur (10) comprend une région de transition (24) du volume de chauffage (20) au canal de chauffage (18),
    caractérisé par un élément de guidage de débit (26) dans la région de transition (24) du volume de chauffage (20) au canal de chauffage (18),
    dans laquelle la région de transition (24) est formée autour du raccordement du canal de chauffage (18) au volume de chauffage (20) et est une région comprenant un changement de distance entre des parois latérales (30, 32) renfermant le canal de chauffage (18) et/ou des parois latérales (34) renfermant le volume de chauffage (20) sur le parcours de la direction de l'axe de commutation (16),
    dans laquelle une section transversale de l'élément de guidage de débit (26) le long d'un plan comprenant l'axe de commutation (16) comprend une forme fermée, et dans laquelle un rapport d'aspect d'une coque convexe (44) de la forme fermée est entre 1:3 et 3: 1.
  2. Unité d'interrupteur (10) selon la revendication précédente, dans laquelle la forme fermée est un polygone régulier avec au moins trois sommets, et préférentiellement un polygone convexe régulier ou un polygone en étoile régulier, ou dans laquelle la forme fermée est un cercle.
  3. Unité d'interrupteur (10) selon l'une quelconque des revendications précédentes, dans laquelle une paroi latérale (30) du canal de chauffage (18) et/ou le volume de chauffage (20) dans la région de transition (24) comprend un filet (42).
  4. Unité d'interrupteur (10) selon l'une quelconque des revendications précédentes, dans laquelle l'unité d'interrupteur (10) comprend une buse (36, 38, 40), dans laquelle la buse (36, 38, 40) renferme au moins partiellement la région d'arc (22) et dans laquelle la buse (36, 38, 40) comprend du PTFE.
  5. Unité d'interrupteur (10) selon l'une quelconque des revendications précédentes, dans laquelle l'élément de guidage de débit (26) tourne au moins partiellement autour de l'axe de commutation (16).
  6. Unité d'interrupteur (10) selon l'une quelconque des revendications précédentes, dans laquelle l'élément de guidage de débit (26) est symétrique en rotation autour de l'axe de commutation (16).
  7. Unité d'interrupteur (10) selon l'une quelconque des revendications précédentes, dans laquelle l'élément de guidage de débit (26) est au moins partiellement agencé au sein du canal de chauffage (18) et/ou dans laquelle l'élément de guidage de débit (26) est au moins partiellement agencé au sein du volume de chauffage (20).
  8. Unité d'interrupteur (10) selon l'une quelconque des revendications précédentes, dans laquelle le canal de chauffage (18) comprend une partie qui s'étend parallèlement à l'axe de commutation (16) et dans laquelle l'élément de guidage de débit (26) est au moins partiellement agencé au sein de ladite partie du canal de chauffage (18).
  9. Unité d'interrupteur (10) selon l'une quelconque des revendications précédentes, dans laquelle l'élément de guidage de débit (26) n'est pas entièrement agencé au sein du canal de chauffage (18).
  10. Unité d'interrupteur (10) selon l'une quelconque des revendications précédentes, dans laquelle l'élément de guidage de débit (26) est agencé de manière espacée des parois opposées (30, 32) du canal de chauffage (18).
  11. Unité d'interrupteur (10) selon l'une quelconque des revendications précédentes, dans laquelle un diamètre d'un cercle délimitant minimal de la coque convexe (44) est d'au moins 10 % d'une distance entre des parois latérales (30, 32) opposées du canal de chauffage (18).
  12. Unité d'interrupteur (10) selon l'une quelconque des revendications précédentes, dans laquelle l'élément de guidage de débit (26) est attaché à au moins une parmi deux parois latérales (30, 32, 34) opposées du canal de chauffage (18) et/ou du volume de chauffage (20).
  13. Dispositif haute ou moyenne tension isolé des gaz comprenant une unité d'interrupteur (10) selon l'une quelconque des revendications d'unité d'interrupteur précédentes, et dans lequel le dispositif haute ou moyenne tension comprend un gaz extincteur d'arc.
  14. Dispositif haute ou moyenne tension isolé des gaz selon la revendication précédente, dans lequel le gaz d'extinction d'arc est choisi parmi le CO2, les mélanges comprenant du CO2, les mélanges de CO2 avec un gaz vecteur et/ou les mélanges de fluorocétones et/ou de fluoronitriles avec un gaz vecteur.
  15. Dispositif haute ou moyenne tension isolé des gaz selon l'une quelconque des revendications de dispositif haute ou moyenne tension isolé des gaz précédentes, dans lequel le dispositif haute ou moyenne tension isolée des gaz est conçu comme un disjoncteur et plus préférentiellement comme disjoncteur de type soufflage, un disjoncteur à auto-soufflage, ou un disjoncteur combiné de type soufflage et à auto-soufflage.
EP22212641.9A 2022-12-09 2022-12-09 Unité d'interrupteur pour dispositif à haute ou moyenne tension isolé par gaz Active EP4383306B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP22212641.9A EP4383306B1 (fr) 2022-12-09 2022-12-09 Unité d'interrupteur pour dispositif à haute ou moyenne tension isolé par gaz
PCT/EP2023/084867 WO2024121374A1 (fr) 2022-12-09 2023-12-08 Unité d'interruption pour dispositif haute ou moyenne tension à isolation gazeuse

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP22212641.9A EP4383306B1 (fr) 2022-12-09 2022-12-09 Unité d'interrupteur pour dispositif à haute ou moyenne tension isolé par gaz

Publications (2)

Publication Number Publication Date
EP4383306A1 EP4383306A1 (fr) 2024-06-12
EP4383306B1 true EP4383306B1 (fr) 2025-08-13

Family

ID=84487509

Family Applications (1)

Application Number Title Priority Date Filing Date
EP22212641.9A Active EP4383306B1 (fr) 2022-12-09 2022-12-09 Unité d'interrupteur pour dispositif à haute ou moyenne tension isolé par gaz

Country Status (2)

Country Link
EP (1) EP4383306B1 (fr)
WO (1) WO2024121374A1 (fr)

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH558079A (de) * 1973-05-10 1975-01-15 Bbc Brown Boveri & Cie Druckgasschalter.
DE102016105539B4 (de) * 2016-03-24 2025-11-20 Hitachi Energy Ltd Elektrische Leistungsschaltvorrichtung

Also Published As

Publication number Publication date
WO2024121374A1 (fr) 2024-06-13
EP4383306A1 (fr) 2024-06-12

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