[go: up one dir, main page]

EP0300308A2 - Disposition de contacts pour un interrupteur de puissance à vide - Google Patents

Disposition de contacts pour un interrupteur de puissance à vide Download PDF

Info

Publication number
EP0300308A2
EP0300308A2 EP88111030A EP88111030A EP0300308A2 EP 0300308 A2 EP0300308 A2 EP 0300308A2 EP 88111030 A EP88111030 A EP 88111030A EP 88111030 A EP88111030 A EP 88111030A EP 0300308 A2 EP0300308 A2 EP 0300308A2
Authority
EP
European Patent Office
Prior art keywords
contact
arc
arrangement according
arc electrode
electrode
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Withdrawn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
EP88111030A
Other languages
German (de)
English (en)
Other versions
EP0300308A3 (fr
Inventor
Karl Dipl.-Ing. Stegmüller (FH)
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.)
Schneider Electric Sachsenwerk GmbH
Original Assignee
Sachsenwerk Licht und Kraft AG
Sachsenwerk AG
AEG Sachsenwerk 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 Sachsenwerk Licht und Kraft AG, Sachsenwerk AG, AEG Sachsenwerk GmbH filed Critical Sachsenwerk Licht und Kraft AG
Publication of EP0300308A2 publication Critical patent/EP0300308A2/fr
Publication of EP0300308A3 publication Critical patent/EP0300308A3/fr
Withdrawn legal-status Critical Current

Links

Images

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
    • 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
    • H01H33/02—Details
    • H01H33/04—Means for extinguishing or preventing arc between current-carrying parts
    • H01H33/12—Auxiliary contacts on to which the arc is transferred from the main contacts
    • 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 circuit breaker according to the preamble of the first claim.
  • a switch contact is known from DE-OS 33 03 659.
  • the known switch contact works with a centrally arranged circular or annular contact electrode and an arc electrode concentrically surrounding it and continuously connected to it, the end face of which recedes relative to that of the contact electrode. Common slots are worked into both electrodes, which have different directions with respect to the contact axis. In the case of short-circuit currents, an arc that arises in the zone of the contact-making electrodes tends to move away from the contact axis in the radial direction due to the electrodynamic effect of the geometric shape of the contact parts.
  • the base points jump onto the lower-lying arc electrodes and run outwards to the respective segment tip. If they reach this at a relatively high instantaneous value of the current, the arc jumps to the next segment after a dwell time. In the known switch contact, larger fusions occur at the slot edges, which can also locally lead to a conductive bridging of the slot in the event of repeated interruptions. In addition, after commutation to the next segment, the arc is in an area of low rotational forces in the base area.
  • the conductive cross sections of both electrodes are relatively thick and therefore generate significant eddy currents that counteract the arc propulsion.
  • the object of the invention is to increase the switching capacity of a vacuum circuit breaker by means of improved circulation conditions for the contracted arc.
  • the main electrode has a contact body (1, 11) with a circular contact surface (20) surrounding the entire circumference of the shoulder (7), which is directed through the evenly distributed, towards the center of the main electrode, into the recess (10) extending slots (2 ), divided into sectors (18, 18a), and -
  • the arc electrode (6, 14) forms a rotating body surrounding the contact surface (20) with a gap (5), which is attached to the shoulder (7) with the addition of an intermediate layer of insulating material (9, 17) and through several, preferably a slot ( 8) is interrupted, a section of the arc electrode (6, 14) adjacent to the slot (8) being in galvanic connection with a sector (18a) of the contact body (1, 11).
  • a large force already acts on a high-current arc at the point of origin, that is to say on the contact surface of the main electrode, which forces it to transition quickly to the arc electrode.
  • This is achieved by the sector-shaped subdivision of the contact body with a relatively large number of sectors.
  • the arc After the arc has commutated on the arc electrode after a short time, it is moved on at a particularly high speed. This is achieved by the angle of approximately 90 ° present in the arc base region between the resulting current path in the arc electrode and the arc axis, which gives the greatest possible Lorentz force.
  • the arc only needs to cross one slot at most once per cycle.
  • a switch contact 21 of the contact arrangement consists of a pot-shaped contact body 1 which is divided by radially arranged slots 2.
  • the contact body 1 is conductively connected both to the contact pin 3 and to a contact ring 4.
  • the contact ring 4 is made under the influence of Arc-resistant material with low welding tendency.
  • the contact ring 4 is surrounded by an arc electrode 6 which, according to FIGS. 1 and 2, is arranged on a correspondingly shaped shoulder 7 of the contact body 1.
  • This arc electrode 6 consists of a ring with a rectangular cross section separated at one point by an approximately tangential to its inner diameter with a slot 8 of length T.
  • this ring is conductively connected to the shoulder 7 in the length of the sector 18a of the contact body 1. At all other points, however, this ring is separated from the shoulder 7 by an insulating intermediate layer 9, for example made of a ceramic material.
  • the conductive connection between the end 6a of the arc electrode 6 and the shoulder 7 is indicated in Figure 2 by hatching.
  • a conductive connection 22 between the inner end 6b of the arc electrode 5 and the adjacent cylindrical part of the contact body 1 is also possible.
  • the insulating intermediate layer 9 is not interrupted in this solution.
  • An arc arising in sector 18a reaches the inner end 6b of the arc electrode 6 without that its base must skip gap 4.
  • the width W of the conductive connection 22 is narrower than the length T of the slot 8.
  • an arc commutating in the region of the width W onto the inner end 6b will experience a force in the direction of rotation (arrow) which will after a full one Circulation to the top 5a drives; with renewed commutation at the beginning of the arc electrode 6, the arc jumps to a zone in which there is already an effective force in the direction of rotation.
  • the opposing surfaces of the arc electrodes 6 of the switch contacts 21 of a contact arrangement according to FIG. 1 do not touch in the closed state of the switch contacts, since they are each behind the contact surfaces of the contact rings 4 by the dimension s.
  • the arc L occurs in FIG. 5 when the circuit breaker opens on an annular contact surface 20 or on the contact ring 4, via which a circuit is fed when the switch is closed.
  • the supply line from the contact pin 3 to the contact ring 4 takes place via the recessed part of the contact body 1, which is divided into sectors by slots 2 and thus brings to the arc L a force dependent on the square of the current, outward force F 1 to effect.
  • FIGS. 3 and 4 show an advantageous modification of the invention in which the slots 2 also continue in the contact ring 4 and form separate sectors 13 there. An even more effective radial force F 1 is generated on the arc base because the entire current I can only flow through a sector 18 to the contact surface 20.
  • a spiral-shaped arc electrode 14 is also indicated in FIGS. 3 and 4, the inner end 14a of which is pointed with the length T. approaches and in the sector 18a of the contact body 11 is in current connection with the paragraph 7 of the latter.
  • the arc electrode 14 is designed, for example, with two turns. In this way, a running path is made available to the arc L. which is larger than the circumference of the main contact-making electrode, without being interrupted by slots or the like.
  • an arc which after its formation in sector 18a (FIG. 4) jumps onto the inner end 14a of the spiral in the manner already described, is subject to a force F acting in the circumferential direction which, due to the geometric relationships, can only assume very small values or even approaches zero. Due to the advantageous design of the arc electrode 14, however, the arc L is caused to commutate to its second turn due to the radial force F 1 and can then rotate under the effect of the full circumferential force F 2. - To increase the outward force F1, the contact body 11 can be formed according to the invention with a recess 19 so that the current I can flow in a part of the contact body 11 at the level of the arc electrode 14 in the radial direction.
  • the spiral of the arc electrode 14 is indicated in FIG. 4 with two windings, in principle it can do even more Have turns.
  • Such a design is particularly suitable for switching devices in networks where relatively long arcing times are to be expected, such as for example in railway networks with a nominal frequency of 16 2/3 Hz.
  • the lowest possible height H of the contact body 11 is advantageous for the electromagnetic force effect on the arc; however, the inner circular area must then be covered with an insulating material plate 12, preferably made of ceramic, in order to avoid reignitions.
  • An essential feature of the invention is that an insulating gap 5 is provided between the contact ring 4 or the sectors 13 and the surrounding running electrode 6 or 14, which runs along the entire circumference and can be filled with a suitable solid insulating material. It is also advantageous to provide the intermediate insulating layer 9 with elevations 15 in order to avoid a conductive bridge between the parts of the running electrodes 6 or 14 or between the running electrode 6 and the circumference of the contact ring 4 or its carrier part 16 in the case of solder connections.

Landscapes

  • Arc-Extinguishing Devices That Are Switches (AREA)
  • Contacts (AREA)
  • High-Tension Arc-Extinguishing Switches Without Spraying Means (AREA)
EP88111030A 1987-07-23 1988-07-11 Disposition de contacts pour un interrupteur de puissance à vide Withdrawn EP0300308A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3724425 1987-07-23
DE19873724425 DE3724425A1 (de) 1987-07-23 1987-07-23 Kontaktanordnung fuer einen vakuum-leistungsschalter

Publications (2)

Publication Number Publication Date
EP0300308A2 true EP0300308A2 (fr) 1989-01-25
EP0300308A3 EP0300308A3 (fr) 1989-10-18

Family

ID=6332218

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88111030A Withdrawn EP0300308A3 (fr) 1987-07-23 1988-07-11 Disposition de contacts pour un interrupteur de puissance à vide

Country Status (2)

Country Link
EP (1) EP0300308A3 (fr)
DE (1) DE3724425A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006002560A1 (fr) * 2004-07-05 2006-01-12 Abb Research Ltd Ampoule sous vide et ensemble de contacts pour un disjoncteur a vide

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4002933A1 (de) * 1990-02-01 1991-08-08 Sachsenwerk Ag Vakuumschaltkammer
DE4112113A1 (de) * 1991-04-10 1991-11-07 Slamecka Ernst Kontaktanordnung fuer vakuumschalter

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3089936A (en) * 1960-02-23 1963-05-14 Gen Electric Contact structure for an electric circuit interrupter
US3462572A (en) * 1966-10-03 1969-08-19 Gen Electric Vacuum type circuit interrupter having contacts provided with improved arcpropelling means
DE2048506C3 (de) * 1970-10-02 1978-09-28 Siemens Ag, 1000 Berlin Und 8000 Muenchen Vakuumschalter
DE3150168C2 (de) * 1981-12-18 1990-03-29 Sachsenwerk, Licht- und Kraft-AG, 8000 München Elektrischer Vakuum-Schalter
DE3151907A1 (de) * 1981-12-23 1983-06-30 Siemens AG, 1000 Berlin und 8000 München Vakuumschaltroehre mit einem ring zur erzeugung eines axialen magnetfeldes
SU1174994A1 (ru) * 1982-01-29 1985-08-23 V Elektrotech I V I Lenina "bakууmhaя дугoгacиteльhaя kamepa"
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
DE3401497A1 (de) * 1982-07-22 1984-08-09 Ernst Prof. Dr.techn.habil. 1000 Berlin Slamecka Vakuumschalter-kontaktanordnung
DE3303659A1 (de) * 1983-02-03 1984-08-16 Vsesojuznyj elektrotechničeskij institut imeni V.I. Lenina, Moskva Kontaktsystem fuer eine vakuumlichtbogenloeschkammer
DE3327513A1 (de) * 1983-07-29 1985-02-07 Siemens AG, 1000 Berlin und 8000 München Topffoermiges kontaktstueck fuer elektrische vakuumschaltroehren
DE3415743A1 (de) * 1984-04-26 1985-10-31 Siemens AG, 1000 Berlin und 8000 München Kontaktanordnung fuer einen vakuumschalter
DE3416368C2 (de) * 1984-04-30 1986-07-17 Ernst Prof. Dr.techn.habil. 1000 Berlin Slamecka Vakuumschalter-Kontaktanordnung
DE3519449A1 (de) * 1985-05-28 1986-01-23 Ernst Prof. Dr.techn.habil. 1000 Berlin Slamecka Erregerkontaktanordnung fuer vakuumschalter

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006002560A1 (fr) * 2004-07-05 2006-01-12 Abb Research Ltd Ampoule sous vide et ensemble de contacts pour un disjoncteur a vide

Also Published As

Publication number Publication date
DE3724425C2 (fr) 1989-07-06
DE3724425A1 (de) 1989-02-02
EP0300308A3 (fr) 1989-10-18

Similar Documents

Publication Publication Date Title
EP0082801B1 (fr) Tube interrupteur à vide avec un anneau pour créer un champ magnétique axial
DE3227482C2 (fr)
EP0104384B1 (fr) Dispositif de contact d'un interrupteur à vide
DE2947090C2 (fr)
DE4002933C2 (fr)
DE3415743A1 (de) Kontaktanordnung fuer einen vakuumschalter
DE2048506C3 (de) Vakuumschalter
DE2946800A1 (de) Vakuum-unterbrecher
DE2204113C3 (de) Kontaktanordnung für Vakuumschalter
EP0073925A1 (fr) Disposition de contacts pour interrupteur à vide
DE2633543C3 (de) Vakuumschalter
EP1763888A2 (fr) Contact de commutation pour tubes commutateurs a vide
EP1198812B1 (fr) Systeme de contact d'un interrupteur a vide
EP0300308A2 (fr) Disposition de contacts pour un interrupteur de puissance à vide
DE4117606A1 (de) Vakuumschalter-kontaktanordnung
EP0225562B1 (fr) Interrupteur à vide
EP0177750B1 (fr) Dispositif de contact pour coupe-circuit sous vide
EP0203367B1 (fr) Dispositif de contact pour interrupteur sous vide
EP0088040A1 (fr) Interrupteur à vide avec un anneau agissant comme enroulement à champ magnétique
DE19957228B4 (de) Kontaktanordnung für eine Vakuumschaltkammer
DE2902489A1 (de) Kontaktanordnung fuer vakuumschalter
DE2815059C2 (de) Schaltstückanordnung für Niederspannungs-Vakuumschütze
DE3416368C2 (de) Vakuumschalter-Kontaktanordnung
DE2822510A1 (de) Vakuumschutzschalter
DE3407604C2 (fr)

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): BE DE FR GB IT NL SE

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): BE DE FR GB IT NL SE

17P Request for examination filed

Effective date: 19900329

17Q First examination report despatched

Effective date: 19920508

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: AEG SACHSENWERK GMBH

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19920921