EP4165669A1 - Interrupteur à vide - Google Patents

Interrupteur à vide

Info

Publication number
EP4165669A1
EP4165669A1 EP21735183.2A EP21735183A EP4165669A1 EP 4165669 A1 EP4165669 A1 EP 4165669A1 EP 21735183 A EP21735183 A EP 21735183A EP 4165669 A1 EP4165669 A1 EP 4165669A1
Authority
EP
European Patent Office
Prior art keywords
vacuum interrupter
holder
metallic shield
tap changer
vacuum
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.)
Pending
Application number
EP21735183.2A
Other languages
German (de)
English (en)
Inventor
Klaus HÖPFL
Silke Wrede
Markus ZINTL
Anniyappan Palani
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.)
Maschinenfabrik Reinhausen GmbH
Scheubeck GmbH and Co
Original Assignee
Maschinenfabrik Reinhausen GmbH
Maschinenfabrik Reinhausen Gebrueder Scheubeck GmbH and Co KG
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 Maschinenfabrik Reinhausen GmbH, Maschinenfabrik Reinhausen Gebrueder Scheubeck GmbH and Co KG filed Critical Maschinenfabrik Reinhausen GmbH
Publication of EP4165669A1 publication Critical patent/EP4165669A1/fr
Pending legal-status Critical Current

Links

Classifications

    • 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
    • H01H9/0005—Tap change devices
    • H01H9/0038—Tap change devices making use of vacuum switches
    • 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
    • H01H9/0005—Tap change devices
    • H01H9/0016—Contact arrangements for tap changers
    • 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
    • H01H33/66261—Specific screen details, e.g. mounting, materials, multiple screens or specific electrical field considerations
    • 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
    • H01H33/66261—Specific screen details, e.g. mounting, materials, multiple screens or specific electrical field considerations
    • H01H2033/66276—Details relating to the mounting of screens in vacuum switches

Definitions

  • the invention relates to a vacuum interrupter for a tap changer for switching between different taps of a transformer and a tap changer with such a vacuum interrupter.
  • vacuum interrupters as switching elements in tap changers, in particular on-load tap changers, for uninterrupted switching under load between winding taps of a tapped transformer has been known from the prior art for decades, for example from the publication WO9630922A1.
  • vacuum interrupters exist in the field of high-voltage technology in a wide variety of designs and areas of application, for example in circuit breakers.
  • Such a magnetic field can be generated by a transformer, depending on its design and construction, and consequently also affect the vacuum interrupters of a tap changer. This external influence can have a negative impact on the service life of the vacuum interrupters, as it can lead to asymmetrical erosion of the contacts and asymmetrical vaporization of the insulating sections in the vacuum interrupters.
  • the improved concept is based on the idea of equipping the vacuum interrupter with a metallic shield against external magnetic fields.
  • a vacuum interrupter for a tap changer which has a metallic shield against external magnetic fields and a bracket included.
  • the metal shielding is in the form of a hollow cylinder and is arranged around at least part of a cylindrical surface area of the vacuum interrupter.
  • the hollow-cylindrical shielding is preferably at least half as high as the cylindrical lateral surface of the vacuum interrupter and is arranged centrally on the vacuum interrupter in the axial direction of the latter.
  • the shield can be made in one piece or in several pieces and consists of soft iron, for example.
  • the bracket is positioned outside of the metallic shield and the vacuum interrupter and at least partially coaxially surrounds the metallic shield and the vacuum interrupter.
  • the vacuum interrupter is preferably coaxially surrounded by the holder by at least 240 degrees.
  • the holder has a number of holding elements which hold the metal shielding in position in relation to the vacuum interrupter.
  • the holding elements comprise at least two projections which project radially inwards and which form a stop for a first end and a second end of the metal shielding.
  • the metallic shielding is positioned on the vacuum interrupter in the axial direction of the latter, preferably in the middle.
  • At least one of the projections comprises a spacer which is arranged between the metallic shield and the vacuum interrupter.
  • the spacer is designed as a wedge-shaped elevation, which is arranged on the inside in the radial direction on the at least one projection and extends in the axial direction of the vacuum interrupter. In the installed state of the holder, the spacer is arranged between the shielding and the vacuum interrupter and prevents the shielding from lying directly on the cylindrical lateral surface of the vacuum interrupter.
  • the retaining elements also include at least one pin that protrudes radially inward and protrudes in a form-fitting manner, ie with a precise fit, into an opening in the metal shielding. This keeps the shield in place and prevents the shield from twisting relative to the vacuum interrupter.
  • the holder comprises at least one inwardly directed shoulder at a first end and at a second end, which rests in a form-fitting manner on the vacuum interrupter.
  • the shoulder can be formed radially around the ends of the bracket and/or radially segmented, d. H. consisting of individual shoulders which are spaced apart and arranged radially at the ends of the bracket.
  • the holder comprises at the first end and at the second end in each case a plurality of struts which run radially inward and bear in a form-fitting manner on the vacuum interrupter.
  • the holder is fixed in the axial direction of the vacuum interrupter by means of the struts.
  • the holder consists of at least two segments which are designed identically to one another and each have a plurality of transverse struts and longitudinal struts.
  • the segments are preferably rotated 180 degrees horizontally and vertically to one another.
  • the vacuum interrupter comprises a fastening ring which is detachably mechanically connected to the holder in such a way that the fastening ring can be inserted into the holder and locked in it by twisting.
  • the fastening ring is supported on the face side of the vacuum interrupter and fixes the holder in the axial direction of the vacuum interrupter by the locking mechanism.
  • a tap changer in particular an on-load tap changer, is also specified, which comprises at least one vacuum interrupter according to the improved concept.
  • the tap changer includes a diverter switch, which includes the vacuum interrupter, or an on-load selector, which includes the vacuum interrupter.
  • FIG. 1 shows a perspective illustration of an exemplary embodiment of a vacuum interrupter according to the improved concept
  • FIG. 2 shows a longitudinal section of the vacuum interrupter from FIG. 1;
  • Figure 3 is a perspective view of an exemplary embodiment of a
  • FIG. 4 shows a perspective detailed view of a further exemplary embodiment of a vacuum interrupter according to the improved concept.
  • FIGS. 1 and 2 show a perspective and a longitudinal sectional view of an exemplary embodiment of a vacuum interrupter according to the improved concept.
  • the vacuum interrupter 1 has a housing with an interrupter chamber 8, which is made of ceramic, for example, and two walls 9, each of which is arranged on the end face and are made of metal, for example.
  • the switching chamber 8 is in the form of a hollow cylinder and has a cylindrical lateral surface. The walls 9 adjoin the switching chamber 8 at the front and close it off in an airtight manner.
  • the vacuum interrupter 1 has a fixed contact 11 and a contact 12 that is movable axially with respect to the vacuum interrupter.
  • the contacts 11 , 12 are arranged in the switching chamber 8 . By actuating the movable contact 12, the vacuum interrupter 1 can be opened and closed.
  • a hollow-cylindrical metallic shield 2 is arranged around a part of the vacuum interrupter 1 , more precisely, around a part of the cylindrical lateral surface of the interrupter 8 along an axis A centrally with respect to the height of the interrupter 8 .
  • a holder 4 coaxially surrounds the vacuum interrupter 1 and the shield 2 from the outside by approximately 240 degrees. The remaining part of the vacuum interrupter 1 and the shield 2 are not affected by the holder 4.
  • At the first end 41 and a second end 42 of the holder 4 are arranged a plurality of struts 44 running radially inwards, which in the installed state of the holder 4 rest in a form-fitting manner on the vacuum interrupter 1 or the end walls 9 and thus the holder 4 with respect to the axis A fix.
  • the bracket 4 consists of two segments which are identical to one another and have a plurality of transverse struts 13 and longitudinal struts 14 .
  • the two segments are rotated 180 degrees horizontally and vertically to each other.
  • Figure 3 shows a perspective view of such a segment of the holder 4 in detail.
  • the holder 4 or the segments have retaining elements with which they rest against the vacuum interrupter 1 or the interrupter chamber 8 and the walls 9 as well as the shield 2 .
  • a plurality of projections 5 projecting radially inwards are arranged on the radially arranged longitudinal struts 14 at the level of a first end 21 and a second end 22 of the shielding 2 . These form an upper and a lower stop for the shield 2 and fix it with respect to the axis A.
  • Spacers 16 are provided on the projections 5, which are connected to one another via partial struts 15. These are designed as wedge-shaped elevations which extend in the axial direction of the vacuum interrupter 1, taper towards the first end 41 of the holder 4 and are arranged in the radial direction on the inside on the partial struts 15 of the projections 5.
  • the wedge-shaped elevations are arranged between the shield 2 and the vacuum interrupter 1 , more precisely the interrupter chamber 8 , in such a way that the shield 2 does not lie directly on the cylindrical lateral surface of the shield 2 .
  • a further holding element is a radially inwardly projecting pin 6 which is arranged centrally on one of the longitudinal struts 14 of the holder 4 .
  • This pin 6 interacts with an opening 23 in the shield 2 in a form-fitting manner. This prevents the shield 2 from twisting depending on the vacuum interrupter 1 .
  • the segments of the bracket 4 each have at the first end 41 and the second End 42 has an internal collar 43 with a paragraph 7, which is arranged radially and directed inwards.
  • the vacuum interrupter 1 or the end walls 9 of the vacuum interrupter 1 rest on the paragraphs 7 .
  • a cable tie 17 is also arranged at the level of the collar 43 at the first end 41 and the second end 42 (cf. FIG. 1).
  • FIG. 4 shows a perspective detailed view of a further exemplary embodiment of a vacuum interrupter according to the improved concept.
  • a fastening ring 3 is arranged at the first end 41 of the holder 4 and is supported on the front wall 9 at the first end 41 .
  • the fastening ring 3 is detachably mechanically connected to the holder 4 according to the principle of a bayonet lock, such that the fastening ring 3 can be inserted into the collar 43 at the first end 41 of the holder 4 and can be locked in this by twisting. In this way, the bracket 4 is fixed with respect to the axis A.

Landscapes

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

Abstract

Un interrupteur à vide (1) pour un changeur de prises comprend un écran métallique (2) cylindrique creux permettant la protection contre des champs magnétiques externes, ledit écran métallique étant disposé autour d'au moins une partie d'une surface latérale cylindrique de l'interrupteur à vide (1). L'interrupteur à vide (1) comprend en outre un support (4) qui est disposé à l'extérieur de l'écran métallique (2) et de l'interrupteur à vide (1) et qui entoure au moins partiellement l'écran métallique et l'interrupteur à vide. Le support (4) présente plusieurs éléments de maintien (5, 6) qui maintiennent l'écran métallique (2) en position en fonction de l'interrupteur à vide (1).
EP21735183.2A 2020-07-06 2021-06-15 Interrupteur à vide Pending EP4165669A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102020117769.0A DE102020117769A1 (de) 2020-07-06 2020-07-06 Vakuumschaltröhre
PCT/EP2021/066010 WO2022008175A1 (fr) 2020-07-06 2021-06-15 Interrupteur à vide

Publications (1)

Publication Number Publication Date
EP4165669A1 true EP4165669A1 (fr) 2023-04-19

Family

ID=76641641

Family Applications (1)

Application Number Title Priority Date Filing Date
EP21735183.2A Pending EP4165669A1 (fr) 2020-07-06 2021-06-15 Interrupteur à vide

Country Status (8)

Country Link
US (1) US20240029967A1 (fr)
EP (1) EP4165669A1 (fr)
JP (1) JP2023532632A (fr)
KR (1) KR20230034218A (fr)
CN (1) CN115836368A (fr)
BR (1) BR112022023553A2 (fr)
DE (1) DE102020117769A1 (fr)
WO (1) WO2022008175A1 (fr)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3329212A1 (de) * 1983-08-10 1985-02-21 Siemens AG, 1000 Berlin und 8000 München Vakuumschaltroehre mit aus metallkoerpern und isolierkoerpern zusammengesetztem gehaeuse
DD226690A1 (de) 1984-09-24 1985-08-28 Buchwitz Otto Starkstrom Schalterpol
DE19510809C1 (de) 1995-03-24 1996-07-04 Reinhausen Maschf Scheubeck Lastumschalter eines Stufenschalters
DE19518533A1 (de) 1995-05-19 1996-11-21 Siemens Ag Vakuumschalter-Anordnung

Also Published As

Publication number Publication date
DE102020117769A1 (de) 2022-01-13
WO2022008175A1 (fr) 2022-01-13
KR20230034218A (ko) 2023-03-09
CN115836368A (zh) 2023-03-21
JP2023532632A (ja) 2023-07-31
US20240029967A1 (en) 2024-01-25
BR112022023553A2 (pt) 2023-01-17

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