EP0012048B1 - Schalter mit rotierendem Lichtbogen - Google Patents

Schalter mit rotierendem Lichtbogen Download PDF

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Publication number
EP0012048B1
EP0012048B1 EP79400820A EP79400820A EP0012048B1 EP 0012048 B1 EP0012048 B1 EP 0012048B1 EP 79400820 A EP79400820 A EP 79400820A EP 79400820 A EP79400820 A EP 79400820A EP 0012048 B1 EP0012048 B1 EP 0012048B1
Authority
EP
European Patent Office
Prior art keywords
electrode
arc
coil
contact
switch according
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
EP79400820A
Other languages
English (en)
French (fr)
Other versions
EP0012048A1 (de
Inventor
Georges Bernard
Pierre Leclercq
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.)
Merlin Gerin SA
Original Assignee
Merlin Gerin SA
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 Merlin Gerin SA filed Critical Merlin Gerin SA
Publication of EP0012048A1 publication Critical patent/EP0012048A1/de
Application granted granted Critical
Publication of EP0012048B1 publication Critical patent/EP0012048B1/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
    • H01H33/02—Details
    • H01H33/04—Means for extinguishing or preventing arc between current-carrying parts
    • H01H33/18—Means for extinguishing or preventing arc between current-carrying parts using blow-out magnet

Definitions

  • the invention relates to an alternating current switch with magnetic blowing generating a rotation of the arc, comprising an insulating envelope containing a gas with high dielectric strength, a pair of separable contacts, a first annular electrode associated with one of said contacts to pick up the arc root as soon as it is formed and a tubular coil coaxial with said first electrode to generate a magnetic field in the zone of formation and extension of the arc drawn between said contacts when the latter are separated and impose a rotary migration of the root of said arc anchored on the first electrode, the latter being of a good conductive material.
  • the switch according to the present invention is characterized in that the ring of said first electrode is thick in the axial direction, is attached to the internal edge of the front face of the coil on the side of the arc-forming zone, is rigidly fixed to the coil support and covers only a small fraction of said front face of the coil and a metal screen of small thickness and / or low conductivity compared to the first electrode is interposed between the formation zone arc and the part of the front face of the coil not covered by the first electrode.
  • the annular electrode extends only over a small part of the front face of the coil, which makes it possible to limit the electrodynamic forces and to position the arc root.
  • the metallic screen subjected to the action of the magnetic field generated by the coil is also the seat of induced currents, but their influence can be limited by the use of a material of low conductivity and a screen of thin thickness . This screen can be shaped as a deflector of ionized gases.
  • Rotating arc switches are known in which the annular electrode only partially covers the front surface of the coil (German patent application No. 2,511,238 (Fig. 3) and French patent No. 2,285,700), but the surface covered by the electrode is greater than half of the front surface and the reduction of repulsion forces is insufficient.
  • the high cylindrical shape of the annular electrode does not allow a concentration of the induced currents in the electrode near the arc and at the zero crossing of the current the intensity of the blowing field of the arc generated by these induced currents is weak and insufficient to extinguish the arc.
  • the section of the annular electrode is inscribed in a circle and the center of gravity of the induced currents coincides with the center of the circle.
  • the coil is secured to a metal carcass, to which is fixed, for example by welding, the annular electrode.
  • the metal carcass constitutes a hoop of the coil as well as a rigid support of the annular electrode capable of withstanding the significant forces of repulsion generated by short-circuit currents flowing through the coil.
  • the carcass is advantageously made of a ferromagnetic material, in particular mild steel, capable of increasing the magnetic blowing field when breaking low currents.
  • the annular electrode is tightly coupled to the blow coil and it constitutes a ring in short-circuit of phase shift located in the zone of maximum field and allowing a conservation of the magnetic blow field at the passage of the current by zero.
  • a second electrode is placed opposite the first one to position the arc in the zone of maximum field generated by the induced currents.
  • a sealed envelope 10, of elongated shape, made of a molded insulating material, is filled with sulfur hexafluoride and contains a fixed contact 12 capable of cooperating with a sliding movable contact 14.
  • the contacts 12, 14, of elongated are arranged coaxially with the casing 10 and are connected to feed-through bushings 16, 17.
  • one of the contacts, in this case the movable contact 14 is tubular to allow the gases to escape through the interior of this contact.
  • the fixed contact 12 is rigidly fixed a carcass 18, having an annular recess 20 for housing a blowing coil 22.
  • the carcass 18 and the coil 22 coaxially surround the fixed contact 12 and the front face 24 of the coil 22 is disposed substantially at the end 26 of the fixed contact 12, forming the contact face cooperating with the movable contact 14.
  • the coil 22 is inserted without clearance in the housing 20, between an internal ferrule 28 and an external ferrule 30 of the carcass 18.
  • the external ferrule 30 constitutes a hoop opposing the bursting of the coil 22, when the latter is traversed by large currents .
  • At the end of the internal ferrule 28 is fixed an annular electrode 32 made of a good conductive material, resistant to the action of arcs.
  • the electrode 32 projects from the end 26 of the contact 12 and includes a collar projecting from the internal edge of the front face 24 of the coil 22 while being attached to the latter.
  • the electrode 32 is in the form of a thick ring, the cross section of which is substantially in a circle.
  • the carcass 18 is made of a ferromagnetic metallic material, in particular mild steel, and the electrode 32 is preferably welded to the ferrule 28 to form a one-piece assembly with the carcass 18 and the coil 22.
  • the part of the face 24 of the coil 22 not covered by the collar of the electrode 32 is capped by an annular washer 34, which carries by means of an insulating ring 38, a screen 36, which surrounds the electrode 32 with little play and is extended by a frustoconical part 40 surrounding the zone of formation and extension of the arc.
  • the part 40 extends to the vicinity of the wall of the envelope 10 and constitutes a deflector of the gases ionized by the arc.
  • the coil 22 is connected on the one hand to the contact 12 and on the other hand to the electrode 32 by conductors (not shown).
  • the movable contact 14 is associated with a fixed tubular electrode 42 having a surface 44 of annular end opposite and of the same diameter as the electrode 32, the spacing between the surface 44 and the electrode 32 corresponding to the optimal distance from extinction of the arc.
  • the end 26 of the fixed contact 12 has at its center a recess 46 and the electrode 42 is split along a generator.
  • the electrodynamic repulsion efforts of the electrode 32 are limited by the limited width of the electrode 32 and are easily taken care of by attachment to the carcass 18. It is important to cover only a small part of the surface. front 24 of the coil 22 by the electrode 32, the other larger part being capped by the screen 36 and the washer 34.
  • the metal carcass 18 holds the coil 22, the front face 24 and the insulating ring 38 are protected by the electrode 32, the screen 36 and the washer 34.
  • the washer 34 and the screen 36 are thin and made of a metallic material of low conductivity, such as stainless steel. They are the seat of limited induced currents and therefore only support repulsion forces easily taken up by the carcass 18.
  • the screen 36 protects the front face 24 of the coil 22 and its deflector 40 deflects the gases ionized by the arc by protecting the wall of the enclosure 10.
  • the deflector also serves as a condensation wall.
  • the ferromagnetic carcass 18 strengthens the magnetic field generated by the weak currents and allows obtaining a sufficient blowing for the rotation of the arcs of weak current.
  • the carcass 18 can be made of mild steel.
  • the recess 46 prevents the migration of the arc root, anchored to the fixed contact 12, towards the center of the latter and the slot of the electrode 42 limits the induced currents and the repulsion forces.
  • the electrode 42 is not essential, the arc remaining in this case anchored on the movable tubular contact 14 in a position less favorable for its extinction when the current crosses zero.

Landscapes

  • Arc-Extinguishing Devices That Are Switches (AREA)

Claims (7)

1. Wechselstromschalter mit einer die Rotation des Lichtbogens bewirkenden, magnetischen Blasung, versehen mit einem ein Gas hoher dielektrischer Festigkeit enthaltenden isolierenden Gehäuse (10), einem Paar trennbare Kontakte (12, 14), einer mit einem (12) der genannten Kontakte vereinigten ersten ringförmigen Elektrode (32) zum Auffangen der Lichtbogenwurzel bei seiner Bildung und einer koaxial zu der genannten ersten Elektrode (32) stehenden rohrförmigen Spule (22), um ein magnetisches Feld in der Bildungs- und Ausstreckungszone des zwischen den genannten Kontakten bei der Trennung der letzteren gezogenen Lichtbogens zu erzeugen, und um eine rotierende Wanderung der auf der ersten aus gut leitendem Material bestehenden Elektrode (32) verankerten Lichtbogenwurzel zu bewirken, dadurch gekennzeichnet, dass der Ring der genannten ersten Elektrode (32) dick in axialer Richtung ist, an den inneren Rand der Frontseite (24) der Spule (22) auf der Seite der Lichtbogenbildungszone gestellt ist, an den Spulenträger starr gebunden ist, und nur einen kleinen Bruchteil der genannten Frontseite (24) der Spule (22) bedeckt, und dass ein metallisches Schild (34 ; 36, 40) von geringer Dicke und/oder geringer Leitfähigkeit bezüglich der ersten Elektrode, zwischen der Lichtbogenbildungszone und dem durch die erste Elektrode (32) nicht bedeckten Teil der Frontseite (24) der Spule (22) aufgestellt ist.
2. Schalter nach 1, versehen mit einer zweiten ringförmigen Elektrode (42) von ungefähr gleichem Durchmesser wie der der ersten Elektrode (32) um die Lichtbogenwurzel auf der Seite des zweiten trennbaren Kontaktes zu fangen und den Lichtbogen in eine Zone, wo das durch die in der genannten ersten Elektrode induzierten Ströme gebildete Feld maximal ist, zu stellen, dadurch gekennzeichnet, dass die genannte ringförmige zweite Elektrode (42) gespaltet ist.
3. Schalter nach 1 oder 2, gekennzeichnet durch einen ferromagnetischen Rahmen (18) mit einem äusseren Spulenspannband (30) und einem inneren die Spuleninnseite (22) haltenden Band (28), wobei die genannte erste Eiektrode (32) starr an dem Frontrand des inneren Bandes (28) befestigt ist.
4. Schalter nach 1, 2 oder 3, dadurch gekennzeichnet, dass ein Schild (34, 36) als Ablenker der durch den Lichtbogen ionisierten Gase ausgebildet ist und sich bis zur Nähe der inneren Wand des Gehäuses (10) erstreckt.
5. Schalter nach irgend einem der vorigen Ansprüche, dadurch gekennzeichnet, dass er versehen ist mit einem länglichen, isolierenden Gehäuse (10), einem feststehenden Kontakt (12), der sich koaxial im Innern der Spule (22) erstreckt und ein gegenüber der die erste Elektrode (22) tragenden Frontseite (24) leicht zurückstehendes Kontaktende (26) hat, einem mit dem feststehenden Kontakt (12) zusammenarbeitenden beweglichen Kontakt (14), der zum Ziehen eines in der axialen Richtung sich erstreckenden Lichtbogens axial bewegbar ist, wobei der genannte Lichtbogen schnell auf die genannte erste Elektrode (32) zum Einschalten der Spule (22) überspringt.
6. Schalter nach 5, dadurch gekennzeichnet, dass das Ende (26) des feststehenden Kontaktes (12) in seiner Mitte (46) ausgehöhlt ist, um den Lichtbogen auf dem äusseren Rand des Kontaktes (12) zu halten.
7. Schalter nach 2, dadurch gekennzeichnet, dass die zweite Elektrode (42) in einem dem besten Lichtbogenlöschabstand entsprechenden Abstand von der ersten Elektrode (32) aufgestellt ist.
EP79400820A 1978-11-10 1979-11-05 Schalter mit rotierendem Lichtbogen Expired EP0012048B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR7832206A FR2441261A1 (fr) 1978-11-10 1978-11-10 Interrupteur a arc tournant
FR7832206 1978-11-10

Publications (2)

Publication Number Publication Date
EP0012048A1 EP0012048A1 (de) 1980-06-11
EP0012048B1 true EP0012048B1 (de) 1982-11-24

Family

ID=9214892

Family Applications (1)

Application Number Title Priority Date Filing Date
EP79400820A Expired EP0012048B1 (de) 1978-11-10 1979-11-05 Schalter mit rotierendem Lichtbogen

Country Status (6)

Country Link
US (1) US4329551A (de)
EP (1) EP0012048B1 (de)
DE (1) DE2964113D1 (de)
FR (1) FR2441261A1 (de)
SG (1) SG61185G (de)
YU (1) YU41190B (de)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2478866A1 (fr) * 1980-03-24 1981-09-25 Merlin Gerin Interrupteur a courant alternatif a arc tournant
EP0039523B1 (de) * 1980-05-07 1983-06-08 BBC Aktiengesellschaft Brown, Boveri & Cie. Hochspannungsleistungsschalter
FR2487113A1 (fr) * 1980-07-17 1982-01-22 Merlin Gerin Interrupteur a arc tournant double
FR2494493A1 (fr) * 1980-11-17 1982-05-21 Merlin Gerin Disjoncteur electrique a autosoufflage par rotation de l'arc
JPS57170233U (de) * 1981-04-20 1982-10-26
FR2505550A1 (fr) * 1981-05-11 1982-11-12 Yaskawa Denki Seisakusho Kk Interrupteur electrique a remplissage gazeux
FR2565731A1 (fr) * 1984-06-08 1985-12-13 Interaction Perfectionnements aux disjoncteurs
FR2596578B1 (fr) * 1986-03-28 1994-05-06 Merlin Et Gerin Disjoncteur electrique a autoexpansion et a arc tournant
FR2599187B1 (fr) * 1986-05-26 1994-10-28 Merlin Gerin Disjoncteur electrique a isolement gazeux et a bobine de soufflage electromagnetique pour la rotation de l'arc
FR2620854A1 (fr) * 1987-09-23 1989-03-24 Alsthom Bobine de soufflage magnetique par rotation de l'arc pour element de contact d'un interrupteur electrique
FR2665571B1 (fr) * 1990-08-01 1992-10-16 Merlin Gerin Disjoncteur electrique a arc tournant et a autoexpansion.
FR2718281B1 (fr) * 1994-03-30 1996-04-26 Gec Alsthom T & D Sa Disjoncteur à haute ou moyenne tension à bobine de soufflage.
US5464956A (en) * 1994-04-08 1995-11-07 S&C Electric Company Rotating arc interrupter for loadbreak switch
KR100351300B1 (ko) * 2000-09-27 2002-09-05 엘지산전 주식회사 회로차단기용 복합소호장치
FR2845514B1 (fr) * 2002-10-03 2004-11-12 Alstom Disjoncteur a gaz a arc tournant
CN102522251A (zh) * 2011-12-09 2012-06-27 沈阳工业大学 Sf6断路器旋磁式灭弧室结构

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2294801A (en) * 1938-05-25 1942-09-01 Westinghouse Electric & Mfg Co Circuit interrupter
CH346927A (de) * 1956-07-10 1960-06-15 Ckd Modrany Narodni Podnik Löschkammer aus Metall für elektrische Schaltgeräte
US3334658A (en) * 1964-03-04 1967-08-08 Randolph Mfg Co Selector valve
US3418440A (en) * 1965-09-14 1968-12-24 Gen Electric Gas-blast circuit breaker
JPS50121775A (de) * 1974-03-14 1975-09-23
CH574673A5 (de) * 1974-08-20 1976-04-15 Bbc Brown Boveri & Cie
FR2285700A1 (fr) * 1974-09-19 1976-04-16 Alsthom Cgee Dispositif de coupure
US4052576A (en) * 1975-09-02 1977-10-04 I-T-E Imperial Corporation Contact structure for SF6 arc spinner
FR2368792A1 (fr) * 1976-10-20 1978-05-19 Cem Comp Electro Mec Appareil electrique de coupure, notamment un disjoncteur, a auto-soufflage de l'arc de coupure par un gaz
CH612293A5 (de) * 1977-04-29 1979-07-13 Bbc Brown Boveri & Cie

Also Published As

Publication number Publication date
FR2441261A1 (fr) 1980-06-06
FR2441261B1 (de) 1981-08-21
YU41190B (en) 1986-12-31
YU269179A (en) 1982-06-30
EP0012048A1 (de) 1980-06-11
SG61185G (en) 1986-11-21
DE2964113D1 (en) 1982-12-30
US4329551A (en) 1982-05-11

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