EP0763841A2 - Agencement de contact pour interrupteur à vide - Google Patents

Agencement de contact pour interrupteur à vide Download PDF

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Publication number
EP0763841A2
EP0763841A2 EP96114428A EP96114428A EP0763841A2 EP 0763841 A2 EP0763841 A2 EP 0763841A2 EP 96114428 A EP96114428 A EP 96114428A EP 96114428 A EP96114428 A EP 96114428A EP 0763841 A2 EP0763841 A2 EP 0763841A2
Authority
EP
European Patent Office
Prior art keywords
contact
webs
contact piece
contact plate
cylindrical section
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Withdrawn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
EP96114428A
Other languages
German (de)
English (en)
Other versions
EP0763841A3 (fr
Inventor
Wenkai Shang
Joseph H.F.G. Lipperts
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.)
ABB Patent GmbH
Original Assignee
ABB Patent GmbH
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 ABB Patent GmbH filed Critical ABB Patent GmbH
Publication of EP0763841A2 publication Critical patent/EP0763841A2/fr
Publication of EP0763841A3 publication Critical patent/EP0763841A3/fr
Withdrawn legal-status Critical Current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

Definitions

  • the invention relates to a contact arrangement for a vacuum interrupter chamber according to the preamble of claim 1.
  • Such contact arrangements comprise a fixed and a movable contact piece, the latter being led out of the switching chamber with the interposition of a bellows.
  • the bellows allows the moving contact piece to move during a switching operation.
  • the contact piece usually comprises a contact carrier made of electrically highly conductive material, e.g. B. of copper, and a contact plate facing the other contact piece made of erosion-resistant material, for example made of a chrome-copper sintered alloy. The manufacture of such a sintered alloy is known per se.
  • an axial magnetic field can be generated, through which the so-called usable surface of the contact piece is concentrated around the center of the contact piece.
  • the usable surface of the contact piece, on which essentially the diffuse arc burns, is about 60% to 70% of the total surface. In the case of such contact pieces in which a magnetic quadrupole is generated, effective use of the entire contact surface is not possible because of the transition areas between the individual field sections.
  • the usable surface is about 60%.
  • the object of the invention is to provide a contact arrangement of the type mentioned in the introduction, in which a strong axial magnetic field with a large usable surface is generated.
  • Each contact carrier accordingly has a cylindrical section and an annular section arranged at the end on the contact piece side; the cylindrical section is connected to the annular section by means of two radial webs which are in alignment with one another and is divided in the region of the webs by means of an obliquely running slot, so that the current flows through one of the webs to the annular section and flows from this over the other of the webs to a projection which projects beyond the webs in the direction of the other contact piece and on which the contact plate is fastened.
  • the slots of the two contact pieces are aligned parallel to one another.
  • the current flows in the one contact piece via the one web to the annular section and divides there, wherein it flows through the annular section approximately transversely to the longitudinal axis in a direction transverse to the longitudinal axis.
  • the current flows in the same direction as in the first web and from there to the contact plate.
  • the current flows from the contact plate over the other web to the annular section, flows through this circular section in the same direction as in one contact piece opposite, and from there reaches the cylindrical section via the first web in this contact piece.
  • the current flows in parallel and in the same direction with respect to the longitudinal axis of the vacuum interrupter, whereby an axial bipolar field is generated between the contact pieces, which ensures that the arc is given a diffuse structure.
  • Another advantageous embodiment of the invention can go that behind the contact piece, a ring of poorly conductive material, for. B. made of iron.
  • This ring has the advantage of further increasing the electric field between the contact pieces in the open state.
  • a further advantageous embodiment of the invention is to be seen in that the contact piece is assigned a support element which is arranged between the contact plate or the ring and the cylindrical section and transmits the contact pressure force to the cylindrical section, so that the slots are prevented from being compressed.
  • This support element is preferably made of stainless steel. With this support body it is achieved that a compression of the slot is prevented by the contact force.
  • FIG. 1a and 1a show the course of the magnetic field B z over the radius of a known contact piece, caused by an internal coil (not shown), which is formed behind the contact plate, ie the contact surface, of the contact piece K 1 within a vacuum interrupter.
  • Fig. 1a shows the course of the magnetic field B z , along the line M 1 -M 1 of Fig. 1a.
  • One can see a central circular area F 1 in which the magnetic field B z is constant, and a circular area F 1a , which surrounds the area F 1 and in which the magnetic field is larger.
  • the usable area (effective usable area), that is the area in which a diffuse arc can burn, is the area F 1 within the inner circle, and compared to the entire circular area of the electrode, the effective usable area is only 60% to 70%.
  • an internal four-pole coil arrangement is provided behind the contact surface of a contact piece K 2 , in which two maxima B z2maxa of the magnetic field B z are generated on the line M 2 -M 2 of FIG. 2b. Between these maxima are two maxima B z2maxb , the vector of which is directed in the opposite direction, which is represented by the symbols point and cross in a circle. This results in four effective usable areas that cover less than 60% of the contact surface. Areas are created between the individual usable areas in which there is no or only a small magnetic field. The switching capacity is accordingly less than z. B. that of a contact piece, in which a magnetic field profile according to FIGS. 1a and 1b is generated.
  • the fixed contact piece 10 is attached to a fixed contact stem 12 and has a contact carrier 13 which has a cylindrical portion 14 and has an annular section 15.
  • the annular section 15 is connected to the cylindrical section 14 by means of webs 16 and 17 which are arranged radially and are aligned with one another.
  • the annular section 15 is protruded centrally by a projection, the diameter of which corresponds to the diameter of the cylindrical section 14.
  • a contact plate 19 is fastened on the projection 18. While the contact carrier 13 is made of copper, the contact plate 19 consists of chrome-copper sintered material.
  • the plate 19 On the side facing away from the contact piece 11, the plate 19 has a recess 20 into which an iron ring 21 is inserted. On the side of the iron ring 21 opposite the contact surface, a support body 22 is inserted, which is supported with its other end on the contact stem 12.
  • the webs are separated by means of an inclined slot 23, so that, for example, in the contact carrier 13 of the movable contact piece 11 there is a current flow I over the cylindrical section 14 and the web 17, which is divided into the annular sections 15a and 15b, as with the Arrows 30 and 31 indicated, divided.
  • the current flow 1 ⁇ 2 x I flows over the sections 15a and 15b from the right to the left side and merges there in order to reach the projection 18 of the movable contact piece via the web 16.
  • the two slots 23 of the two contact pieces 10 and 11 run parallel to one another, so that there is a current flow in the fixed contact piece 10 parallel to the current flow in the movable contact piece 11.
  • the current coming from the movable contact piece 11 flows to the right via the web arranged parallel to the web 17, in order then to flow to the left in the partial sections 15a and 15b, from where it flows into the cylindrical section 14 via the corresponding left web of the movable contact piece 11 flows.
  • the two contact pieces 10 and 11 are of identical construction and are assigned to one another in the installed state in such a way that the two slots 23 run parallel to one another. As a result, an axially extending magnetic field B Z is generated, which gives the arc 31 a diffuse shape.
  • the rings 21 serve to reinforce the magnetic field.
  • This geometry has the advantages that high axial magnetic fields are generated which make it possible to interrupt high short-circuit currents with the vacuum interrupter.
  • Magnetic field profiles B z5l and B z5r arise to the left and right of a center line of symmetry SS, upwards and downwards, respectively, in opposite directions, which according to FIG. 5b each produce an elliptical shape on both sides of the line of symmetry; the area F 5r and F 5l within the elliptical shapes is the effective usable area in which the diffuse arc burns.
  • the area between the usable areas F 5r and F 5l in which the magnetic field has a zero crossing is very narrow. Based on the total area of the contact electrode, the effective usable area therefore takes up more than 75% of the total contact area.

Landscapes

  • High-Tension Arc-Extinguishing Switches Without Spraying Means (AREA)
EP96114428A 1995-09-16 1996-09-10 Agencement de contact pour interrupteur à vide Withdrawn EP0763841A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE1995134398 DE19534398A1 (de) 1995-09-16 1995-09-16 Kontaktanordnung für eine Vakuumschaltkammer
DE19534398 1995-09-16

Publications (2)

Publication Number Publication Date
EP0763841A2 true EP0763841A2 (fr) 1997-03-19
EP0763841A3 EP0763841A3 (fr) 1998-05-20

Family

ID=7772361

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96114428A Withdrawn EP0763841A3 (fr) 1995-09-16 1996-09-10 Agencement de contact pour interrupteur à vide

Country Status (2)

Country Link
EP (1) EP0763841A3 (fr)
DE (1) DE19534398A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001041173A1 (fr) * 1999-11-27 2001-06-07 Moeller Gmbh Systeme de contact pour chambre de commutation a vide

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19705158A1 (de) * 1997-02-11 1998-08-13 Abb Patent Gmbh Vakuumschaltkammer
DE19707778A1 (de) * 1997-02-27 1998-09-03 Abb Patent Gmbh Kontaktanordnung für einen Vakuumschalter
DE19707793A1 (de) * 1997-02-27 1998-09-03 Abb Patent Gmbh Kontaktanordnung für einen Vakuumschalter
DE19707794C2 (de) * 1997-02-27 2002-05-02 Abb Patent Gmbh Kontaktanordnung für eine Vakuumschaltkammer
DE19809305A1 (de) * 1998-03-05 1999-09-09 Abb Patent Gmbh Kontaktstückanordnung für eine Vakuumkammer
DE19902500B4 (de) * 1999-01-22 2004-07-22 Moeller Gmbh Verfahren zum Herstellen einer Kontaktanordnung für eine Vakuumschaltröhre
DE19902499C2 (de) * 1999-01-22 2001-02-22 Moeller Gmbh Verfahren zum Herstellen einer Kontaktanordnung für eine Vakuumschaltröhre

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5826132B2 (ja) * 1978-11-22 1983-06-01 株式会社日立製作所 真空しや断器
US4260864A (en) * 1978-11-30 1981-04-07 Westinghouse Electric Corp. Vacuum-type circuit interrupter with an improved contact with axial magnetic field coil
DE3151907A1 (de) * 1981-12-23 1983-06-30 Siemens AG, 1000 Berlin und 8000 München Vakuumschaltroehre mit einem ring zur erzeugung eines axialen magnetfeldes
DE3401497A1 (de) * 1982-07-22 1984-08-09 Ernst Prof. Dr.techn.habil. 1000 Berlin Slamecka Vakuumschalter-kontaktanordnung
ZA842116B (en) * 1983-04-14 1984-10-31 Westinghouse Electric Corp Method of attaching contacts to electrodes
DE3332092A1 (de) * 1983-09-02 1985-03-21 Siemens AG, 1000 Berlin und 8000 München Kontaktanordnung fuer eine vakuumschaltroehre
US4717797A (en) * 1984-12-18 1988-01-05 Siemens Aktiengesellschaft Contact arrangement for a vacuum switching tube
US4855547A (en) * 1985-11-12 1989-08-08 Mitsubishi Denki Kabushiki Kaisha Vacuum interrupter
DE3610241A1 (de) * 1986-03-26 1987-10-01 Siemens Ag Kontaktanordnung fuer vakuumschalter mit axialem magnetfeld
DD247991A1 (de) * 1986-04-11 1987-07-22 Elektroprojekt Anlagenbau Veb Vakuumschalter-kontaktanordnung mit vorrichtung zur erzeugung eines axialen magnetfeldes

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001041173A1 (fr) * 1999-11-27 2001-06-07 Moeller Gmbh Systeme de contact pour chambre de commutation a vide

Also Published As

Publication number Publication date
EP0763841A3 (fr) 1998-05-20
DE19534398A1 (de) 1997-03-20

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