EP0167479B1 - Vakuumschaltröhre mit einer Spule zum Erzeugen eines Magnetfeldes - Google Patents

Vakuumschaltröhre mit einer Spule zum Erzeugen eines Magnetfeldes Download PDF

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Publication number
EP0167479B1
EP0167479B1 EP85730081A EP85730081A EP0167479B1 EP 0167479 B1 EP0167479 B1 EP 0167479B1 EP 85730081 A EP85730081 A EP 85730081A EP 85730081 A EP85730081 A EP 85730081A EP 0167479 B1 EP0167479 B1 EP 0167479B1
Authority
EP
European Patent Office
Prior art keywords
coil
contact piece
vacuum interrupter
fixed
magnetic field
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
EP85730081A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0167479A1 (de
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
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
Application filed by Siemens AG filed Critical Siemens AG
Publication of EP0167479A1 publication Critical patent/EP0167479A1/de
Application granted granted Critical
Publication of EP0167479B1 publication Critical patent/EP0167479B1/de
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
    • H01H33/6644—Contacts; Arc-extinguishing means, e.g. arcing rings having coil-like electrical connections between contact rod and the proper contact
    • H01H33/6645—Contacts; Arc-extinguishing means, e.g. arcing rings having coil-like electrical connections between contact rod and the proper contact in which the coil like electrical connections encircle at least once the contact rod
    • 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 vacuum interrupter with a fixed contact piece and a movable contact piece which is arranged so as to be movable in a straight line relative to it, and with a coil through which the current to be switched flows for generating a magnetic field which axially penetrates the space between the contact pieces, the coil being arranged in a partially stationary manner and the remaining part is arranged with the same winding sense on the movable contact.
  • a vacuum interrupter of this type has become known from EP-A-0 073 925.
  • the coil is an equal part of the contact pieces.
  • the axially directed magnetic field has the task of avoiding a contraction of the arc when switching high currents.
  • Auxiliary switching points within the contact pieces make the coils only effective when they are switched off. In this way, losses of electricity heat in the closed state of the contact pieces are reduced.
  • the coils are each formed with the diameter of the associated ring-shaped switching piece and are therefore of different sizes.
  • the movable contact piece has a considerable additional mass.
  • the invention has for its object to provide an axial magnetic field vacuum interrupter of the type mentioned that works with little loss and with as little magnetic residual field in the zero current crossing and has a low-mass movable contact.
  • This object is achieved according to the invention in that the coil is arranged stationary for the most part and the remaining part is arranged on the movable contact piece. In this way it is achieved without using ferromagnetic bodies that the magnetic field penetrates the space between the contact pieces approximately axially.
  • the coil consists of two sections connected in series by the arc, it essentially behaves like a single coil. Since only a small part of the total number of ampere turns of the coil can be accommodated on the movable contact piece, this contact piece can be designed in a simple manner with little mass and with little loss.
  • the stationary and movable part of the coil can be carried out in a similar manner as is known per se in the construction of vacuum interrupters.
  • the fixed part of the coil can be designed as a power supply to the fixed contact piece and can have a slotted contact plate, the diameter of which corresponds approximately to the mean diameter of the coil turns of the fixed part coil.
  • the dimensioning of the contact plate ensures that a magnetic field of sufficient strength is already present on the outermost edge of the contact plate.
  • a multi-start version of the fixed part of the coil is recommended. This creates several parallel current paths. By slitting the contact plate, residual magnetic fields can be suppressed in a known manner at the time of zero current, which have an unfavorable effect on arc quenching.
  • the remaining part of the coil to be accommodated on the movable contact piece can be achieved in a known manner by a cup-shaped configuration of the movable contact piece, the wall of the contact piece being slanted at an angle and covered with a flat contact plate. What is essential here is the arrangement of the slots in such a way that the magnetic field generated runs in the same direction as the magnetic field of the stationary coil part.
  • Figure 1 shows a vacuum interrupter schematically in section.
  • a stationary coil is shown unwound in FIG.
  • Figures 3 and 4 show examples of slotted contact plates.
  • the vacuum interrupter 1 shown in FIG. 1 has a housing 2 composed of metal parts and ceramic parts.
  • An upper end flange 3 carries on the outside a threaded connecting bolt 4 and inside the housing 2 a fixed part coil 5.
  • This is designed with a large cross-section in order to be able to generate a strong magnetic field with low current heat losses.
  • a mechanical strength of the coil corresponding to the stresses is achieved by supporting bodies 6 arranged between the turns.
  • the Coil is multi-start, that is, in the present case with four parallel branches, as is illustrated in FIG. 2 by means of a development.
  • the parallel branches are designated in Figure 2 with 5a, 5b, 5c and 5d.
  • the side of the partial coil 5 facing away from the end flange 3 is connected to a switching element 7, the contact plate 8 of which has approximately the average diameter of the coil turns.
  • This contact plate can consist of a material which is particularly suitable for switching in a vacuum, for example a chromium-copper composite material. Such a material can also be applied to a mechanically stronger carrier plate.
  • an electrically non-conductive or poorly conductive support body for supporting the contact plate 8 can be arranged in the interior of the coil section 5.
  • a movable power supply bolt 10 as a carrier of a movable contact piece 11 is displaceably guided by means of a slide bearing, not shown.
  • a bellows 19 allows the movement of the power supply pin 10 in the direction of the double arrow 23 required for switching on and off and, at the same time, completely seals the interior of the switching tube 1 from the surrounding atmosphere.
  • the movable contact piece 11 is largely designed like the well-known pot contact pieces.
  • the wall 12 is provided with slots 13 which run obliquely to the contact piece axis and which cause the current to change its direction of flow in such a way that the contact piece receives the property of a coil turn.
  • the movable contact piece 11 On its side facing the fixed contact plate 7, the movable contact piece 11 likewise carries a contact plate 14 with a diameter corresponding to the contact plate 7.
  • the contact plates 8 and 14 can be slotted to avoid eddy currents.
  • a slitting can be arranged in a known manner, for example radially according to FIG. 3 or according to FIG. 4 (contact plates 18 and 24) such that the slits begin at the edge of the contact plate and lead past the center.
  • the part of the housing 2 surrounding the contact pieces is formed by a metal jacket 15, to which a ceramic hollow insulator 16 is connected in the direction of the upper end flange 3 and another ceramic hollow insulator 17 in the direction of the lower end flange.
  • the connections between all parts of the housing 2 can be formed in a known manner by soldering.
  • shield rings 20 and 21 are attached to avoid concentrations of the electric field.
  • the switching tube described acts in the following manner:
  • the switch-on state is brought about by the upward movement of the power supply bolt 10.
  • a continuous current path is then formed between the upper connecting pin 4 and the threaded pin 22 of the power supply pin 10, which includes the upper end flange 3, the partial coil 5, the contact plate 8, the contact plate 14, the slotted wall 12 as a movable partial coil and the current supply pin 10.
  • the current heat losses occurring in this closed state are kept relatively low in that the coil section 5 is designed with a deliberately large cross section. Since the current path is free of ferromagnetic parts, there are no additional losses. If the switch-off state shown in FIG. 1 is brought about by the downward movement of the power supply bolt 10, the switch-off arc arises between the contact plates 8 and 14.
  • the contact and coil arrangement described can be used independently of a specific housing design.
  • the housing 2 described is therefore only one example that can be modified both with regard to the specified materials and the design.
  • the partial coil located on the movable contact piece 11 can be embodied differently than is shown in the exemplary embodiment.

Landscapes

  • High-Tension Arc-Extinguishing Switches Without Spraying Means (AREA)
  • Electromagnets (AREA)
EP85730081A 1984-06-19 1985-06-11 Vakuumschaltröhre mit einer Spule zum Erzeugen eines Magnetfeldes Expired EP0167479B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3422949 1984-06-19
DE3422949A DE3422949A1 (de) 1984-06-19 1984-06-19 Vakuumschaltroehre mit einer spule zum erzeugen eines magnetfeldes

Publications (2)

Publication Number Publication Date
EP0167479A1 EP0167479A1 (de) 1986-01-08
EP0167479B1 true EP0167479B1 (de) 1989-09-06

Family

ID=6238839

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85730081A Expired EP0167479B1 (de) 1984-06-19 1985-06-11 Vakuumschaltröhre mit einer Spule zum Erzeugen eines Magnetfeldes

Country Status (4)

Country Link
US (1) US4618750A (enrdf_load_stackoverflow)
EP (1) EP0167479B1 (enrdf_load_stackoverflow)
JP (1) JPS6113518A (enrdf_load_stackoverflow)
DE (2) DE3422949A1 (enrdf_load_stackoverflow)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1987006052A1 (en) * 1986-03-26 1987-10-08 Siemens Aktiengesellschaft Berlin Und München Contact system for vacuum switches with an axial magnetic field
US4831327A (en) * 1987-05-01 1989-05-16 Hydro-Quebec Self-powered electrical measuring system isolated from electrical perturbances
GB2233498A (en) * 1989-06-21 1991-01-09 Gen Electric Co Plc Vacuum switch arc control
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
DE4033811A1 (de) * 1990-10-24 1992-04-30 Sachsenwerk Ag Vakuumschalter
KR100295905B1 (ko) * 1998-07-18 2001-08-07 이종수 진공인터럽터용전극구조체
FR2922355B1 (fr) * 2007-10-12 2009-12-04 Schneider Electric Ind Sas Procede de fabrication de pastilles de contacts pour un appareil de coupure electrique et pastille de contact obtenue selon ce procede
JP5097934B2 (ja) * 2008-04-02 2012-12-12 明電Ｔ＆Ｄ株式会社 大容量真空遮断器
FR2950729B1 (fr) * 2009-09-29 2016-08-19 Areva T&D Sas Enroulement pour contact d'ampoule a vide a moyenne tension a coupure d'arc amelioree, ampoule a vide et disjoncteur, tel qu'un disjoncteur sectionneur d'alternateur associes
US8653396B2 (en) * 2011-09-28 2014-02-18 Eaton Corporation Vacuum switch and hybrid switch assembly therefor
US8710389B2 (en) 2011-11-15 2014-04-29 Eaton Corporation Vacuum switch and electrode assembly therefor

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0073925A1 (de) * 1981-08-26 1983-03-16 Siemens Aktiengesellschaft Kontaktanordnung für Vakuumschalter

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3372259A (en) * 1965-05-28 1968-03-05 Gen Electric Vacuum-type electric circuit interrupter with arc-voltage limiting means
GB1163271A (en) * 1965-08-06 1969-09-04 English Electric Co Ltd Circuit Interrupters
NL6511914A (enrdf_load_stackoverflow) * 1965-09-13 1967-03-14
US3836740A (en) * 1972-05-03 1974-09-17 Westinghouse Electric Corp Vacuum type circuit interrupter having improved contacts
JPS4914367U (enrdf_load_stackoverflow) * 1972-05-04 1974-02-06
SE392781B (sv) * 1973-09-10 1977-04-18 Tokyo Shibaura Electric Co Vakuumbrytare
US4153827A (en) * 1976-01-26 1979-05-08 Merlin Gerin Magnetic blow-out arc extinguishing device
JPS55138734U (enrdf_load_stackoverflow) * 1979-03-26 1980-10-03
DE3033632C2 (de) * 1980-09-06 1985-03-21 Calor-Emag Elektrizitäts-Aktiengesellschaft, 4030 Ratingen Vakuumschalter

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0073925A1 (de) * 1981-08-26 1983-03-16 Siemens Aktiengesellschaft Kontaktanordnung für Vakuumschalter

Also Published As

Publication number Publication date
JPH0244094B2 (enrdf_load_stackoverflow) 1990-10-02
US4618750A (en) 1986-10-21
EP0167479A1 (de) 1986-01-08
DE3422949A1 (de) 1985-12-19
JPS6113518A (ja) 1986-01-21
DE3572887D1 (en) 1989-10-12

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