EP0104384B1 - Dispositif de contact d'un interrupteur à vide - Google Patents

Dispositif de contact d'un interrupteur à vide Download PDF

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Publication number
EP0104384B1
EP0104384B1 EP83107901A EP83107901A EP0104384B1 EP 0104384 B1 EP0104384 B1 EP 0104384B1 EP 83107901 A EP83107901 A EP 83107901A EP 83107901 A EP83107901 A EP 83107901A EP 0104384 B1 EP0104384 B1 EP 0104384B1
Authority
EP
European Patent Office
Prior art keywords
contact
contacts
support body
axial
carrier
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.)
Expired
Application number
EP83107901A
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German (de)
English (en)
Other versions
EP0104384A1 (fr
Inventor
Bernt Dr. Paul
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
Original Assignee
Siemens AG
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=6171670&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0104384(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Siemens AG filed Critical Siemens AG
Publication of EP0104384A1 publication Critical patent/EP0104384A1/fr
Application granted granted Critical
Publication of EP0104384B1 publication Critical patent/EP0104384B1/fr
Expired 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
    • H01H33/6642—Contacts; Arc-extinguishing means, e.g. arcing rings having cup-shaped contacts, the cylindrical wall of which being provided with inclined slits to form a coil

Definitions

  • the invention relates to a contact arrangement for vacuum switches with coaxial opposed axial field contacts according to the preamble of claim 1.
  • the maximum breaking capacity of vacuum switches is known to be given by the maximum values of the current during the arc phase and the recurring voltage after the arc has broken off and can be favorably influenced by a magnetic field parallel to the direction of the arc current.
  • a contraction of the arc which leads to an increase in the arc voltage and the power conversion associated with this voltage, can be prevented by a coaxial magnetic field in the area of the arc between the opened contacts.
  • a coil which encloses the switching chamber cylindrically can be provided in these so-called axial field contacts. It is electrically in series with the switch contacts and builds up an axial magnetic field that is dependent on the current and penetrates the gap between the coaxial contacts in the axial direction.
  • the coil can also be constructed in two layers and the turns can be made to go back and forth helically.
  • the prior art according to Article 54 (3) and (4) EPC includes contact arrangements for vacuum switches with axial field contacts arranged coaxially opposite one another, in which slitting of the contact carriers in the same direction in the two contacts generates the axial field after the contacts have opened, and those with a cover are provided and in which the power supply forms a support body. The end of the support body is separated from the cover by an air gap when the contacts are open.
  • This design is based on the task of generating a diffuse arc by concentrating the axial magnetic field between the opened contacts. This requires that an air gap is created by resilient material after the contacts have opened (EP-A-0 073 925).
  • the contact arrangement for vacuum switches known from US-A-4 117 288 contains axial field contacts, the contact base of which is connected via essentially hollow cylindrical contact carriers to a contact disk, the free flat side of which serves as a contact contact surface. The ends of a turn that are approximately opposite each other at the contact circumference are connected to the contact base or the contact disk.
  • the contact carrier is formed by two half-turns of a field coil, which generates the axial magnetic field.
  • a hollow cylindrical support body is arranged centrally between the contact base and the contact disk and essentially consists of an annular ceramic body which is soldered to the contact base and the contact disk.
  • this support body is practically ineffective in the region of the contact near the axis and is not suitable for high contact pressure.
  • the half-turns of the field coil have a relatively large resistance.
  • the invention has for its object to provide a contact arrangement with axial field contacts that generate such a flux density between the open contacts that a contraction of the arc and thus thermal overload, in particular the respective anode, avoided and the switching capacity is increased accordingly.
  • the contacts should be low-resistance, low-induction and insensitive to high contact pressure when the vacuum switch is closed.
  • the contacts consist essentially of three parts, first of all the contact carrier made of electrically highly conductive material, preferably copper, which is placed on the contact base and is provided with slots which are inclined in the same direction, preferably helically, in both contacts and thus represent the coil part for the axial magnetic field , and the substantially columnar support body made of electrically poorly conductive material, for example a chromium-nickel steel, which at least at its end facing the other contact is preferably expanded to approximately the inside diameter of the contact carrier and thus in this embodiment the cavity on the end face of the contact, thirdly, the contact disc resting with its edge region on the contact carrier and with its central region on the support body, which preferably is inseparably connected, in particular soldered, to the end face of the contact carrier. can be.
  • FIG. 1 a contact arrangement according to the invention is shown in a partially sectioned side view.
  • Figure 2 shows a special embodiment of the contact disk.
  • two contacts 2 and 4 with mutually facing end faces are arranged coaxially to one another.
  • These contacts each consist of a hollow cylindrical contact carrier 6 or 8, which is connected to current supply bolts 14 or 16 via a contact base 10 or 12.
  • the end faces of the contact carriers 6 and 8 and in each case a fully cylindrical support body 18 or 22 are each provided with a contact disk 26 or 28. which are each provided with a bevel 27 and 29 at their edges, so that a central part of the contact disks 26 and 28 forms the contact contact surface of the contacts 2 and 4.
  • the support bodies 18 and 22 can each be provided on their end face facing the contact disk 26 or 28 with an extension 19 or 23 serving to center the contact disk 26 or 28.
  • the end faces of the support bodies 18 and 22, which face the contact base 10 and 12 are each provided with an extension 20 and 24, respectively.
  • These extensions 20 and 24 are preferably much larger than the extensions 19 and 23 so that they have a favorable effect on the current transfer from the power supply 14 or 16 via the contact base 10 or 12 to the associated contact carrier 6 or 8.
  • the supporting bodies 18 and 22 are each designed as a rotating body, the ends of which are expediently expanded in a particular embodiment of the contact arrangement in such a way that the cross section of the supporting bodies 18 and 22 each approximately forms the profile of a double-T beam.
  • the ends are expediently widened to such an extent that the diameter of the end faces of the support bodies 18 and 22 is approximately equal to the inner diameter d ; the contact carrier 6 and 8.
  • the contact carriers 6 and 8 are each provided with slots 7 and 9 which are inclined with respect to the axis of rotation of the contact arrangement shown in dot-dash lines in FIG. 1 and which run in the same direction in the two contacts 2 and 4, so that those formed between the individual slots 7 and 9 are formed Repeat the bars in the opposite contact in the same direction.
  • the slots 7 and 9 can preferably form a helix.
  • Such slots can be produced in a simple manner with a cylindrical milling cutter, the diameter of which is equal to the slot width and which is at least as long as the wall thickness of the contact carriers 6 and 8 and which is guided helically with a predetermined pitch angle radially to the axis of rotation of the contacts 2 and 8 .
  • the angle of inclination of the screw bar line of the slots 7 and 9 is preferably selected in the range from approximately 60 to 76 °, a preferred value for the angle of inclination is approximately 70 °.
  • the contact disks can each be provided with radially extending slots 32 which prevent eddy currents.
  • the specific axial magnetic flux density B / I is plotted as a function of the contact distance a K . It can be seen that up to a maximum contact distance of 20 mm used in practice, the specific axial magnetic flux density in the region of the rotation axis is at least 4 ⁇ T / A reached.
  • the magnetic field generated by the contact carriers 6 and 8 when the contacts 2 and 4 are open between the contacts is essentially homogeneous over the entire contact distance a K.
  • This special contact distance is indicated in the diagram in FIG. 3 by an arrow marked with an H.
  • the specific axial field remains approximately constant up to a diameter of approximately (d a + d ; ) / 4 and then drops outwards. It is therefore preferably effective in the central area between the opened contacts 2 and 4, in which the arc is ignited when disconnected under load current.
  • the annular cavity between the support body 18 or 22 and the contact carrier 6 or 8 is shielded by the contact disk 26 or 28 or by the extended end faces of the support body 18 or 22 against the electric field between the contacts, so that a hollow cathode discharge can't burn in this room.
  • the support body 18 and 22 also relieve the slotted contact carrier 6 and 8, so that the slots 7 and 9 can not be squeezed together. Since the entire end face of the contact disks 26 and 28 is available for the arc, the thermal load on the contacts 2 and 4 is correspondingly low. Furthermore, the mean solid angle at which the plasma of the arc can diffuse out of the gap between the opened electrodes 2 and 4 is relatively small. The shield current is thus further reduced and the voltage-lowering effect of the magnetic field is supported accordingly.
  • the slots 32 divide the contact disks 26 and 28 into disk segments, each of which covers one of the end faces of the webs, which are formed by the slots 7 and 9 in the contact carriers 6 and 8, respectively.

Landscapes

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

Claims (3)

1. Dispositif de contact pour un interrupteur à vide comportant des contacts à champ axial (2, 4) disposés coaxialement en vis-à-vis l'un de l'autre et comportant les caractéristiques suivantes :
les contacts comportent chacun une base (10, 12), à laquelle est relié un porte-contact cylindrique creux qui est pourvu de-moyens servant à produire le champ magnétique axial,
les contacts (2, 4) sont munis de disques respectifs de contact (26, 28), qui forment la surface d'appui du contact,
entre la base (10, 12) du contact et le disque de contact (26, 28) se trouve disposé un corps de support cylindrique (18, 22) constitué en un matériau conduisant mal le courant électrique et qui est relié selon une liaison par formes complémentaires au disque de contact (26, 28),

remarquable par les caractéristiques supplémentaires suivantes :
les moyens servant à produire le champ magnétique axial sont des fentes obliques (7, 9) des porte-contacts (6, 8), qui, dans les deux contacts (2, 4), sont inclinés dans la même direction par rapport à l'axe de rotation des contacts à champ axial (2, 4),
le corps de support (18, 22) est un corps massif remplissant, suivant la direction radiale, uniquement une partie de l'espace intérieur du porte-contact respectif (6, 8) et dont le diamètre s'élargit en formant une bride au niveau de l'extrémité tournée vers le disque de contact (26 ou 28).
2. Dispositif de contact suivant la revendication 1, caractérisé par le fait que le corps de support (18, 22) s'élargit également de manière à former une bride au niveau de l'extrémité tournée vers la base (10, 12) du contact, de telle sorte qu'il possède approximativement le profil en coupe transversale d'un support en double T.
3. Dispositif de contact suivant la revendication 2, caractérisé par le fait que le corps de support (18, 22) est constitué en un acier amagnétique.
EP83107901A 1982-08-25 1983-08-10 Dispositif de contact d'un interrupteur à vide Expired EP0104384B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19823231593 DE3231593A1 (de) 1982-08-25 1982-08-25 Kontaktanordnung fuer vakuumschalter
DE3231593 1982-08-25

Publications (2)

Publication Number Publication Date
EP0104384A1 EP0104384A1 (fr) 1984-04-04
EP0104384B1 true EP0104384B1 (fr) 1987-11-11

Family

ID=6171670

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83107901A Expired EP0104384B1 (fr) 1982-08-25 1983-08-10 Dispositif de contact d'un interrupteur à vide

Country Status (4)

Country Link
US (1) US4532391A (fr)
EP (1) EP0104384B1 (fr)
JP (1) JPS5960829A (fr)
DE (2) DE3231593A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004031887B3 (de) * 2004-06-30 2006-04-13 Siemens Ag Schaltkontakt für Vakuumschaltröhren
DE102015217647A1 (de) 2015-09-15 2017-03-16 Siemens Aktiengesellschaft Schaltkontakt einer Vakuumschaltröhre mit Stützkörpern

Families Citing this family (29)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3407088A1 (de) * 1984-02-27 1985-08-29 Siemens AG, 1000 Berlin und 8000 München Kontaktanordnung fuer vakuumschalter
DE3415744A1 (de) * 1984-04-26 1985-10-31 Siemens AG, 1000 Berlin und 8000 München Kontaktanordnung fuer einen vakuumschalter
DE3415743A1 (de) * 1984-04-26 1985-10-31 Siemens AG, 1000 Berlin und 8000 München Kontaktanordnung fuer einen vakuumschalter
US4675483A (en) * 1984-09-10 1987-06-23 Siemens Aktiengesellschaft Contact arrangement for vacuum switches
DE3507317C2 (de) * 1985-03-01 1993-11-18 Siemens Ag Kontaktanordnung für Vakuumschalter
GB8510442D0 (en) * 1985-04-24 1985-05-30 Vacuum Interrupters Ltd High current switch contacts
JPH0731966B2 (ja) * 1985-07-12 1995-04-10 株式会社日立製作所 真空しや断器
EP0238967A1 (fr) * 1986-03-26 1987-09-30 Siemens Aktiengesellschaft Disposition de contacts pour interrupteur sous vide à champ magnétique axial et méthode de fabrication des contacts assortis
EP0298981B1 (fr) * 1986-03-26 1990-07-11 Siemens Aktiengesellschaft Systeme de contacts pour interrupteur a vide avec champ magnetique axial
DE3610241A1 (de) * 1986-03-26 1987-10-01 Siemens Ag Kontaktanordnung fuer vakuumschalter mit axialem magnetfeld
DE3613450A1 (de) * 1986-04-21 1987-10-22 Siemens Ag Kontaktanordnung fuer vakuumschalter
DE8915750U1 (de) * 1989-07-28 1991-05-08 Siemens AG, 8000 München Kontaktanordnung für eine Vakuumschaltröhre
US5111008A (en) * 1990-09-13 1992-05-05 Square D Company Effective arc stack/efficient contact carrier
US5387771A (en) * 1993-04-08 1995-02-07 Joslyn Hi-Voltage Corporation Axial magnetic field high voltage vacuum interrupter
DE4327714A1 (de) * 1993-08-18 1995-02-23 Abb Patent Gmbh Scheibenförmige Platte
US6639169B2 (en) * 2001-09-12 2003-10-28 Kabushiki Kaisha Meidensha Contact for vacuum interrupter and vacuum interrupter using the contact
JP3840934B2 (ja) * 2001-09-12 2006-11-01 株式会社明電舎 真空インタラプタ用接触子及び真空インタラプタ
EP1294002B1 (fr) * 2001-09-12 2007-12-12 Kabushiki Kaisha Meidensha Contact pour disjoncteurs à vide et disjoncteur avec un tel contact
US6965089B2 (en) * 2003-02-21 2005-11-15 Mcgraw-Edison Company Axial magnetic field vacuum fault interrupter
US7772515B2 (en) * 2005-11-14 2010-08-10 Cooper Technologies Company Vacuum switchgear assembly and system
US7488916B2 (en) * 2005-11-14 2009-02-10 Cooper Technologies Company Vacuum switchgear assembly, system and method
US8450630B2 (en) * 2007-06-05 2013-05-28 Cooper Technologies Company Contact backing for a vacuum interrupter
US7781694B2 (en) * 2007-06-05 2010-08-24 Cooper Technologies Company Vacuum fault interrupter
DE102007063414B3 (de) * 2007-12-18 2009-04-23 Siemens Ag Kontaktscheibe für eine Vakuumschaltröhre
JP2011242879A (ja) * 2010-05-14 2011-12-01 Panasonic Corp 接続装置
US9640353B2 (en) * 2014-10-21 2017-05-02 Thomas & Betts International Llc Axial magnetic field coil for vacuum interrupter
GB2552839A (en) * 2016-08-12 2018-02-14 The General Electric Company Improvements to vacuum switching device contacts
US10643808B2 (en) 2018-10-09 2020-05-05 S&C Electric Company Vacuum switching devices
RU203212U1 (ru) * 2020-11-30 2021-03-26 Федеральное государственное бюджетное образовательное учреждение высшего образования "Сибирский государственный индустриальный университет", ФГБОУ ВО "СибГИУ" Контактное устройство вакуумной дугогасительной камеры

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4117288A (en) * 1976-06-25 1978-09-26 Westinghouse Electric Corp. Vacuum type circuit interrupter with a contact having integral axial magnetic field means
DE3112407A1 (de) * 1981-03-28 1982-04-08 Calor-Emag Elektrizitäts-Aktiengesellschaft, 4030 Ratingen Schaltkontakt fuer vakuumschalter

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL299341A (fr) * 1964-03-11
GB1163271A (en) * 1965-08-06 1969-09-04 English Electric Co Ltd Circuit Interrupters
FR2279216A1 (fr) * 1973-09-10 1976-02-13 Tokyo Shibaura Electric Co Interrupteur a vide a champ magnetique
JPS52150571A (en) * 1976-06-09 1977-12-14 Hitachi Ltd Vacuum breaker electrode
JPS555204A (en) * 1978-05-27 1980-01-16 Mitsubishi Heavy Ind Ltd Manufacturing method of box type construction
JPS6129151Y2 (fr) * 1979-10-09 1986-08-28
DE3033632C2 (de) * 1980-09-06 1985-03-21 Calor-Emag Elektrizitäts-Aktiengesellschaft, 4030 Ratingen Vakuumschalter
JPS5784530A (en) * 1980-11-17 1982-05-26 Hitachi Ltd Vacuum breaker
JPS5789241U (fr) * 1980-11-20 1982-06-02
DE3133799A1 (de) * 1981-08-26 1983-03-17 Siemens AG, 1000 Berlin und 8000 München "kontaktanordnung fuer vakuumschalter"
DE3151907A1 (de) * 1981-12-23 1983-06-30 Siemens AG, 1000 Berlin und 8000 München Vakuumschaltroehre 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

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4117288A (en) * 1976-06-25 1978-09-26 Westinghouse Electric Corp. Vacuum type circuit interrupter with a contact having integral axial magnetic field means
DE3112407A1 (de) * 1981-03-28 1982-04-08 Calor-Emag Elektrizitäts-Aktiengesellschaft, 4030 Ratingen Schaltkontakt fuer vakuumschalter

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004031887B3 (de) * 2004-06-30 2006-04-13 Siemens Ag Schaltkontakt für Vakuumschaltröhren
DE102015217647A1 (de) 2015-09-15 2017-03-16 Siemens Aktiengesellschaft Schaltkontakt einer Vakuumschaltröhre mit Stützkörpern
WO2017045862A1 (fr) 2015-09-15 2017-03-23 Siemens Aktiengesellschaft Contact de commutation d'un tube commutateur à vide pouvu de corps de support
CN108028150A (zh) * 2015-09-15 2018-05-11 西门子公司 真空开关管的具有支撑体的开关触头
CN108028150B (zh) * 2015-09-15 2020-10-30 西门子公司 真空开关管的具有支撑体的开关触头

Also Published As

Publication number Publication date
JPS5960829A (ja) 1984-04-06
DE3374486D1 (en) 1987-12-17
DE3231593A1 (de) 1984-03-01
US4532391A (en) 1985-07-30
JPH0322007B2 (fr) 1991-03-26
EP0104384A1 (fr) 1984-04-04

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