EP0163593A1 - Kontaktanordnung für einen Vakuumschalter - Google Patents

Kontaktanordnung für einen Vakuumschalter Download PDF

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Publication number
EP0163593A1
EP0163593A1 EP85730062A EP85730062A EP0163593A1 EP 0163593 A1 EP0163593 A1 EP 0163593A1 EP 85730062 A EP85730062 A EP 85730062A EP 85730062 A EP85730062 A EP 85730062A EP 0163593 A1 EP0163593 A1 EP 0163593A1
Authority
EP
European Patent Office
Prior art keywords
contact
piece
contact piece
magnetic field
slots
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.)
Withdrawn
Application number
EP85730062A
Other languages
German (de)
English (en)
French (fr)
Inventor
Karl Dr. rer. nat. Zückler
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 EP0163593A1 publication Critical patent/EP0163593A1/de
Withdrawn legal-status Critical Current

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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
    • H01H33/664—Contacts; Arc-extinguishing means, e.g. arcing rings
    • H01H33/6644—Contacts; Arc-extinguishing means, e.g. arcing rings having coil-like electrical connections between contact rod and the proper contact
    • 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
    • H01H33/6643—Contacts; Arc-extinguishing means, e.g. arcing rings having disc-shaped contacts subdivided in petal-like segments, e.g. by helical grooves

Definitions

  • the invention relates to a contact arrangement for a vacuum switch with a fixed contact piece and a movable contact piece arranged opposite it in the axial direction with an embodiment of the two contact pieces suitable for generating an axially aligned magnetic field.
  • the contact pieces are designed as pot contact pieces, in the walls of which slits are milled in a corresponding manner.
  • the contact pieces are connected on their sides facing away from each other with a support element in the form of a support bolt; on their other sides, the contact pieces each have a contact disk which is essentially radially slotted to suppress eddy currents.
  • the current flowing through the contact pieces is deflected by the inclined slots in the walls in such a way that it receives a current component flowing in the circumferential direction of the contact pieces. This current component generates a magnetic field which is in phase with the current and passes through the contact pieces in the axial direction.
  • the axial magnetic field causes the arc that forms between them to be diffuse, which results in a reduced erosion of the contact disks.
  • the axial magnetic field causes a reduction in the arc voltage and thus a reduction in the power converted in the arc. Because the angle of inclination for the slots in the walls of the contact pieces by their outer dimensions is limited, the axial magnetic field generated with the known contact arrangement is relatively weak.
  • the invention is based on the object of specifying a contact arrangement for a vacuum switch which, even when large currents are switched off, results in a low load on its contact pieces and a reduction in the operating voltage of the arc and is distinguished by a particularly simple construction.
  • the fixed contact piece on its side facing away from the movable contact piece is assigned a coaxial winding body which is connected at one end to a fixed support element and at the other end to the fixed contact piece that a current flow that supports the axially aligned magnetic field is possible through the winding body.
  • An important advantage of the contact arrangement according to the invention is that the winding body assigned to the fixed contact piece guides the current flowing through it in an orbit coaxial with the contact pieces, so that the current generates an additional magnetic field which amplifies this in addition to the axial magnetic field generated in the contact pieces.
  • This strengthening of the axial magnetic field has an improvement in the quenching of the arc that arises between the contact pieces when the contact pieces are separated, because the arc voltage and thus the power used in the arc is further reduced by the further magnetic field.
  • the transition from a diffuse arc to a contracted arc shifts towards larger currents, so that even with relatively large currents Arc is diffuse and therefore causes less contact disc burn-up.
  • Another advantage of the magnetic field additionally generated in the winding body is that, together with the axial magnetic field generated in the contact pieces, it generates particularly strong attractive forces between the contact pieces. Therefore, large current surges can be mastered with contact pieces lying on top of one another, because the attractive forces between the contact pieces generate the contact pressure required for this, without having to provide a particularly strong compression spring for generating this contact pressure for the movable contact piece.
  • the magnetic field generated by the current in the winding body advantageously has in the area between the contact pieces in addition to the strong axial magnetic field component an additional radial magnetic field component.
  • this radial magnetic field component When the contact pieces are separated, this radial magnetic field component generates a force acting on the arc between the contact pieces, which moves the arc in an orbit along the surfaces of the contact disks, so that the burning on the contact disks is further reduced by the rotating arc.
  • the effort for generating the axial magnetic field is considerably less in the case of the contact arrangement according to the invention because, owing to the aligned oblique slots in the walls of the contact pieces, it requires only a single winding body which is assigned to the fixed contact piece. This not only saves weight of the vacuum switch containing the contact arrangement, it is namely the drive for the movable contact piece can be designed much easier because when separating the contact pieces the mass to be accelerated by the drive is considerably less.
  • the winding body of the contact arrangement according to the invention is designed such that that the direction of the turns points from one end to the other end approximately in the direction in which the slots in the wall of the fixed contact piece run towards the movable contact piece.
  • the winding direction of the winding body corresponds to the winding direction of the line sections formed in the two contact pieces by the oblique signal strands, so that the current flowing through the winding body generates a magnetic field which amplifies the axial magnetic field emanating from the contact pieces.
  • the winding body consists of an open ring and is connected at one end by means of a radial line piece to the fixed support element and at its other end by means of a further radial line piece to the fixed contact piece.
  • the open ring and the radial line pieces have particularly large cross-sectional areas in order to keep the heat losses in the vacuum switch low; the associated weight gain is only of minor importance because the winding body is exclusively assigned to the fixed contact piece and therefore does not have to be accelerated when the contact pieces are separated.
  • the inner diameter of the ring advantageously corresponds approximately to the outer diameter of the contact pieces, so that the magnetic field generated by the current in the ring also penetrates their edge regions.
  • Contact pieces which are designed as pot contact pieces, each with a slotted base plate and a lid-like, also slotted contact disk lying on the wall, each oblique slot in the wall each having a further slot in the base plate and an additional slot in the Contact disc is in connection, it is particularly advantageous to form the further slots in the base plate and the additional slots in the contact disc in such a deviation from the respective radial direction that in the base plate and in the contact disc in the area between two adjacent further or Additional slots each allow a current to flow with a current component that amplifies the axial magnetic field in the circumferential direction of the contact piece in question.
  • the base plate and the contact disk will run through them the further and additional slots are divided into line sections, in each of which the center point of their cross-sectional area in the central region of the base plate or contact disk relative to the center point of the cross-sectional area of the respective line section in the region of the outer edge of the base plate or contact plate deviates from the radial direction in the circumferential direction of the Contact piece is offset that the current flowing through it as well as through the oblique slot of the wall receives a current component in the circumferential direction; this current component causes a further amplification of the axial magnetic field between the contact pieces.
  • the further and additional slots in the base plates and contact disks of the contact pieces can be designed such that they run spirally in the base plate and also spiral in the contact disk with opposite curvature. It is particularly advantageous, however, for contact pieces in which each oblique slot in the wall runs in one plane together with the associated further slot in the base plate, to arrange the additional slots in the contact disk in such a way that each additional slot is in each case rectilinear in the plane of the assigned oblique slot in the wall and further slot in the base plate. In this case, the slots can be machined into the corresponding contact piece in a particularly simple manner by straight saw cuts.
  • the contact arrangement shown in FIG. 1 has a movable contact piece 1 and a fixed contact piece 2, which are arranged opposite one another in the axial direction.
  • Both contact pieces 1 and 2 are each designed as so-called pot contact pieces and each consist of a pot-shaped contact carrier 3 and 4 and a contact washer 7 and 8 resting on the annular edge surfaces of the walls 5 and 6 of the two contact carrier 3 and 4.
  • a sector-shaped part is cut out in the case of the fixed contact piece 2.
  • the walls 5 and 6 of the two contact carriers 3 and 4 are provided with oblique slots 9 and 10 in the circumferential direction, each of which is inclined in accordance with the contact disks 7 and 8 of the contact pieces 1 and 2.
  • the oblique slots 9 and 10 continue spirally in the form of further slots 9 1 and 10 1 in the base plates 11 and 12 of the contact carriers 3 and 4 from their outer edge to a circular disk-shaped area in the middle of the respective base plate 11 and 12 respectively.
  • the spiral slots 9 1 and 10 'in the base plates 11 and 12 are curved in a circumferential direction of the respective contact piece 1 or 2, which corresponds to the circumferential direction in which the slots 9 and 10 in the walls 5 and 6 of the contact pieces 1 and 2 are inclined towards the respective contact disk 7 or 8.
  • the contact disks 7 and 8 resting on the edge surfaces of the walls 5 and 6 each consist of a chromium-copper composite material and have additional slots 13 and 14, which are also spiral, but with opposite curvature to the slots 9 1 and 10 'run in the respective base plates 11 and 12 respectively.
  • Each contact piece 1 and 2 each contains an annular support body 15, which cannot be seen in the movable contact piece 2, and which is located in the interior of the respective; Contact piece 1 or 2 is arranged between the base plate 11 or 12 and the contact plate 7 or 8.
  • the Support body 15 is preferably made of a poorly conductive magnetic material with a very small remanence, such as. B. ferrite.
  • the movable contact piece 1 is connected in the circular region in the middle of its base 11 to a cylindrical support element 16 in the form of a support bolt, which is only shown in sections.
  • the fixed contact piece 2 On its side facing away from the movable contact piece, the fixed contact piece 2 is assigned a winding body 20, which essentially consists of an open ring 21, the inner diameter of which corresponds approximately to the outer diameter of the fixed and movable contact pieces 2 and 1.
  • the ring 21 has a parting line 22 which runs obliquely to the ring plane, in the area of which the open ring 21 is provided at its one end 23 with a radial line piece 24 which extends to the center of the ring 21; there the open ring 21 with its line piece 24 is placed on a fixed support element 25 designed as a carrier bolt.
  • the open ring 21 is provided with a further radial line piece 27, which also extends at a parallel distance from the line piece 24 to the center of the ring 21.
  • the fixed contact piece 2 with the central area of the base plate 12 of its contact carrier 4 is placed on the line piece 27.
  • An insulating spacer 28 is arranged between the two radial line pieces 24 and 27, which prevents the line pieces 24 and 27 from touching one another.
  • the arrows 30 indicate the current flow through the entire contact arrangement.
  • the current through the win boy body 20 generates a magnetic field, the direction of which is indicated by the dashed arrows 31.
  • the magnetic field 31 generated in the winding body 20 has an axial magnetic field component 32 and a radial magnetic field component 33.
  • the axial magnetic field component 32 is superimposed on the axial magnetic field 34 generated by the current component flowing in the contact pieces 1 and 2 in the circumferential direction.
  • a contact piece of the contact arrangement according to the invention shown in FIGS. 2, 3 and 4 like the contact pieces shown in FIG. 1, is designed as a pot contact piece which has a pot-shaped contact carrier 40 with a base plate 41 and a hollow cylindrical wall 42; on the wall 42 there is a cover 43 attached to it in a cover-like manner.
  • the contact piece is connected in the region of the center of its base plate 41 to a support element 44 which, when the contact piece is stationary, is part of a winding body (not shown) corresponding to FIG. 1 and is designed in the form of a movable support bolt when the contact piece is movable.
  • the wall 42 of the contact piece is provided in the circumferential direction at regular intervals with oblique slots 45 which are inclined in accordance with the contact disk 43.
  • the base plate 41 and the contact disk 43 each have an equal number of further slots 46 or additional slots 47, which extend in a straight line from the outer edge to a circular area in the middle of the base plate 41 or the contact disk 43.
  • Each oblique slot 45 in the wall 42 runs together with the associated further slot 46 in the base plate 41 and additional slot 47 in the contact disk 43 in one plane.
  • a current 48 flowing through the contact piece receives both in the Wall 42 and in the base plate 41 and in the contact plate 43 each have a current component 49 in the circumferential direction of the contact piece; these current components 49 generate a magnetic field 50 which passes axially through the contact piece.

Landscapes

  • High-Tension Arc-Extinguishing Switches Without Spraying Means (AREA)
EP85730062A 1984-04-26 1985-04-17 Kontaktanordnung für einen Vakuumschalter Withdrawn EP0163593A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3415743 1984-04-26
DE19843415743 DE3415743A1 (de) 1984-04-26 1984-04-26 Kontaktanordnung fuer einen vakuumschalter

Publications (1)

Publication Number Publication Date
EP0163593A1 true EP0163593A1 (de) 1985-12-04

Family

ID=6234527

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85730062A Withdrawn EP0163593A1 (de) 1984-04-26 1985-04-17 Kontaktanordnung für einen Vakuumschalter

Country Status (4)

Country Link
US (1) US4667070A (enrdf_load_stackoverflow)
EP (1) EP0163593A1 (enrdf_load_stackoverflow)
JP (1) JPS60235319A (enrdf_load_stackoverflow)
DE (1) DE3415743A1 (enrdf_load_stackoverflow)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2174549B (en) * 1985-04-24 1989-12-06 Vacuum Interrupters High current switch contacts
EP0410049A1 (de) * 1989-07-28 1991-01-30 Siemens Aktiengesellschaft Kontaktanordnung für eine Vakuumschaltröhre
FR2719151A1 (fr) * 1994-04-11 1995-10-27 Hitachi Ltd Valve à vide et procédé pour fabriquer cette valve, et disjoncteur à vide comportant une valve à vide et procédé pour fabriquer ce disjoncteur.
CN103828010A (zh) * 2011-07-23 2014-05-28 Abb技术股份公司 用于真空断路器的触点组件
CN110853975A (zh) * 2019-11-27 2020-02-28 云南电网有限责任公司电力科学研究院 一种碟式触头
DE102021210895A1 (de) 2021-09-29 2023-03-30 Siemens Aktiengesellschaft Kontaktscheibe für eine Vakuumschaltröhre

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3724425A1 (de) * 1987-07-23 1989-02-02 Sachsenwerk Ag Kontaktanordnung fuer einen vakuum-leistungsschalter
DE3828556C1 (en) * 1988-08-23 1990-03-15 Sachsenwerk Ag, 8400 Regensburg, De Contact arrangement for a vacuum switch
DE3900684A1 (de) * 1989-01-12 1990-07-26 Sachsenwerk Ag Schaltkontakt fuer vakuumschalter
DE3915287C2 (de) * 1989-05-10 1997-12-18 Sachsenwerk Ag Kontaktanordnung für einen Vakuumschalter
DE4002933A1 (de) * 1990-02-01 1991-08-08 Sachsenwerk Ag Vakuumschaltkammer
DE4021945C2 (de) * 1990-07-10 1999-12-30 Alstom Sachsenwerk Gmbh Schaltvorrichtung zur Unterbrechung von Fehlerströmen
JPH05159851A (ja) * 1991-12-06 1993-06-25 Mitsubishi Electric Corp 高電流密度グロー放電スイッチ
JP2861757B2 (ja) * 1992-11-10 1999-02-24 三菱電機株式会社 真空バルブの電極装置
DE69413407D1 (de) * 1993-07-22 1998-10-22 Abb Power Transmission Pty Lichtbogenbehältervorrichtung
KR100295905B1 (ko) * 1998-07-18 2001-08-07 이종수 진공인터럽터용전극구조체
DE19934909C1 (de) * 1999-07-21 2001-06-13 Siemens Ag Kontaktanordnung für eine Vakuumschaltröhre
DE10201097A1 (de) * 2002-01-09 2003-07-24 Siemens Ag Kontaktträger zum Halten einer Kontaktscheibe einer Kontaktanordnung für Vakuumschalter
DE10221363C1 (de) * 2002-05-07 2003-12-24 Siemens Ag Topfförmiger Schaltkontakt mit Metalldampfabschirmung
DE10253866B4 (de) * 2002-11-15 2005-01-05 Siemens Ag Kontaktstück mit abgerundeten Schlitzkanten
CN103971985A (zh) * 2013-02-01 2014-08-06 西门子公司 真空开关管的接触件以及接触系统
DE102014205315A1 (de) * 2014-03-21 2015-09-24 Siemens Aktiengesellschaft Verfahren zur Herstellung eines Schaltkontakts

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1424276A (fr) * 1964-02-11 1966-01-07 Ass Elect Ind Perfectionnements aux montages de contact des interrupteurs sous vide
FR1428446A (fr) * 1964-03-16 1966-02-11 Thomson Houston Comp Francaise Perfectionnements aux électrodes des interrupteurs de circuits
FR2235469A1 (enrdf_load_stackoverflow) * 1973-06-30 1975-01-24 Tokyo Shibaura Electric Co
US4196327A (en) * 1976-12-06 1980-04-01 Hitachi, Ltd. Vacuum interrupter
DE3227482A1 (de) * 1982-07-20 1983-02-03 Ernst Prof. Dr.techn.habil. 1000 Berlin Slamecka Vakuumschalter-kontaktanordnung mit vorrichtung zur erzeugung eines achsialen magnetfeldes
EP0082801A1 (de) * 1981-12-23 1983-06-29 Siemens Aktiengesellschaft Vakuumschaltröhre mit einem Ring zur Erzeugung eines axialen Magnetfeldes

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4934955U (enrdf_load_stackoverflow) * 1972-06-30 1974-03-27
SE392781B (sv) * 1973-09-10 1977-04-18 Tokyo Shibaura Electric Co Vakuumbrytare
US4079219A (en) * 1975-08-29 1978-03-14 I-T-E Imperial Corporation SF 6 Puffer for arc spinner
DE2638700C3 (de) * 1976-08-27 1983-11-10 Siemens AG, 1000 Berlin und 8000 München Elektrischer Vakuumschalter
DE3231593A1 (de) * 1982-08-25 1984-03-01 Siemens AG, 1000 Berlin und 8000 München Kontaktanordnung fuer vakuumschalter
US4553002A (en) * 1983-12-05 1985-11-12 Westinghouse Electric Corp. Axial magnetic field vacuum-type circuit interrupter

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1424276A (fr) * 1964-02-11 1966-01-07 Ass Elect Ind Perfectionnements aux montages de contact des interrupteurs sous vide
FR1428446A (fr) * 1964-03-16 1966-02-11 Thomson Houston Comp Francaise Perfectionnements aux électrodes des interrupteurs de circuits
FR2235469A1 (enrdf_load_stackoverflow) * 1973-06-30 1975-01-24 Tokyo Shibaura Electric Co
US4196327A (en) * 1976-12-06 1980-04-01 Hitachi, Ltd. Vacuum interrupter
EP0082801A1 (de) * 1981-12-23 1983-06-29 Siemens Aktiengesellschaft Vakuumschaltröhre mit einem Ring zur Erzeugung eines axialen Magnetfeldes
DE3227482A1 (de) * 1982-07-20 1983-02-03 Ernst Prof. Dr.techn.habil. 1000 Berlin Slamecka Vakuumschalter-kontaktanordnung mit vorrichtung zur erzeugung eines achsialen magnetfeldes

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2174549B (en) * 1985-04-24 1989-12-06 Vacuum Interrupters High current switch contacts
EP0410049A1 (de) * 1989-07-28 1991-01-30 Siemens Aktiengesellschaft Kontaktanordnung für eine Vakuumschaltröhre
US5064976A (en) * 1989-07-28 1991-11-12 Siemens Aktiengesellschaft Contact configuration for a vacuum interrupter
FR2719151A1 (fr) * 1994-04-11 1995-10-27 Hitachi Ltd Valve à vide et procédé pour fabriquer cette valve, et disjoncteur à vide comportant une valve à vide et procédé pour fabriquer ce disjoncteur.
CN103828010A (zh) * 2011-07-23 2014-05-28 Abb技术股份公司 用于真空断路器的触点组件
US9330868B2 (en) 2011-07-23 2016-05-03 Abb Technology Ag Contact assembly for a vacuum circuit breaker
CN110853975A (zh) * 2019-11-27 2020-02-28 云南电网有限责任公司电力科学研究院 一种碟式触头
CN110853975B (zh) * 2019-11-27 2021-11-02 云南电网有限责任公司电力科学研究院 一种碟式触头
DE102021210895A1 (de) 2021-09-29 2023-03-30 Siemens Aktiengesellschaft Kontaktscheibe für eine Vakuumschaltröhre

Also Published As

Publication number Publication date
JPH0212368B2 (enrdf_load_stackoverflow) 1990-03-20
US4667070A (en) 1987-05-19
JPS60235319A (ja) 1985-11-22
DE3415743A1 (de) 1985-10-31

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Inventor name: ZUECKLER, KARL, DR. RER. NAT.