US2836683A - Arc-extinction casing for circuit-breaker - Google Patents

Arc-extinction casing for circuit-breaker Download PDF

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Publication number
US2836683A
US2836683A US568311A US56831156A US2836683A US 2836683 A US2836683 A US 2836683A US 568311 A US568311 A US 568311A US 56831156 A US56831156 A US 56831156A US 2836683 A US2836683 A US 2836683A
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US
United States
Prior art keywords
arc
casing
nozzle
extinction
breaker
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 - Lifetime
Application number
US568311A
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English (en)
Inventor
Andre A H Souchet
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.)
Telemecanique SA
Original Assignee
La Telemecanique Electrique 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 La Telemecanique Electrique SA filed Critical La Telemecanique Electrique SA
Application granted granted Critical
Publication of US2836683A publication Critical patent/US2836683A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
    • H01H9/34—Stationary parts for restricting or subdividing the arc, e.g. barrier plate

Definitions

  • This extinction is generally effected by blowing the arc, either magnetically or by compressed air, within the interior of a casing which surrounds the contacts. These casings are sometimesy formed by pole plates between which the blowing device lengthens the arc by incurving it until it is extinguished.
  • the present invention has for its object a blowing casing in which the rupture of the electric current is obtained with practically no external sign of its occurrence.
  • a casing of this kind the flames of the arc are prevented from passing out of the casing; the casing however enables the gases heated by the flames to be evacuated.
  • the casing is formed by a portion in the shape of a convergent nozzle which encloses the contacts, this nozzle opening through a narrow passages into an expansion chamber which communicates with the exterior.
  • the portion in the form of a nozzle is divided into compartments by means of fins orientated in the general direction of the nozzle, these tins tending to split up the arcs and cool the gases produced by the arcs.
  • the nozzle and the expansion chamber have a common wall and the communicating passage between these two spaces is delimited between the edge of this common wall and a partition which is substantially at right angles to the said wall, and which forms at the same time the space of the nozzle and that of the expansion chamber.
  • This arrangement has a two-fold advantage; on the one hand the choice of the position of the partition with respect to the common wall enables the dimensions of the narrow passage to be regulated, and on the other hand, the gases passing out of the nozzle are slowed down by their contact with the partition and they pass into the expansion chamber in a direction which is practically opposite to that of their passage out of the nozzle.
  • This passage in the form of a baffle assists the effect of cooling and of slowing down of the gases.
  • the casing is preferably formed by two pole plates having the general shape of quarters of a circle, coupled at their periphery by a partition, the pole plates being hollowed out, on the one hand internally so as to form a flattened nozzle when they are brought together and on the other hand, in the thickness of these pole plates, ⁇ on each side of the said flattened nozzle, so as to form the expansion chambers.
  • Fig. l shows in cross-section, following the line I--I of Fig. 2, an arc-extinction casing improved in accordance with the invention.
  • Fig. 2 is a cross-section taken along the line II-II of Fig. l.
  • Fig. 3 shows a cross-section, similar to that of Fig. 2, of an alternative form of embodiment.
  • the current reaches the incurved xed contact 1 through a metallic winding 2 which is intended to create a magnetic field which ensures the extinction of the arc.
  • This eld is guided along a core 14 of magnetic metal, which assembles together the magnetic pole plates 12 held in place by the. insulating cross-member I3 in the form of a reel.
  • this winding may be reduced simply to a bar which passes through and which is sufficient to create the necessary magnetic field.
  • the contact 1 co-operates the moving contact 3 which can pass from the position shown in full lines (closed position) to the open position 3a shown in dotted lines.
  • the arc which is struck between the contacts 1 and 3 moves along these contacts towards the exterior and extends in a curve under the effect of the magnetic field.
  • This arc is thus developed between the insulating jaws 4, which have the general shape of a quarter of a circle, of the arc casing.
  • These jaws are hollowed-out internally so as to form a kind of convergent attened nozzle 5 which is directed towards the periphery of the casing.
  • the fins or blades 6 In the narrower portion of the nozzle are arranged the fins or blades 6, the general direction of which is radial.
  • tins may be fitted into slots formed in the pole plates.
  • the pole plates are connected together by an incurved partition 7 of insulating material, which is fitted into oppositelydisposed slots in the pole plates, and which practically closes the casing, with the exception of the small spaces 8 formed between the partition 7 and the edge 9 of the peripheries of the pole plates which constitute the extremity of the nozzle 5.
  • the partition 7 may have a U-section which encloses the section of the casing. ln this case, the hollow spaces 10 are formed on the external faces of the cheeks.
  • an arc-extinction device comprising a attened chamber in which said contact members are housed, a at convergent nozzle communicating with said chamber and forming an extension thereof, and a wall extending opposite the discharge end of said nozzle at a distance therefrom to provide a lateral restricted passage between said wall and said nozzle end, whereby any hot gases generated in said chamber upon formation therein of an arc, expand through said nozzle and issue therefrom in the form of a jet striking said wall and diverted thereby into said lateral restricted passage, said flattened chamber being in the general shape of a sector of a circle, said flat nozzle extending along theperiphery of said sector over a generally circular arc, and said wall extending over an arc of a circle substantially concentric with the former-mentioned arc, said device further comprising two elongated and flattened expansion chambers extending on both sides yof

Landscapes

  • Arc-Extinguishing Devices That Are Switches (AREA)
  • Circuit Breakers (AREA)
US568311A 1955-08-29 1956-02-28 Arc-extinction casing for circuit-breaker Expired - Lifetime US2836683A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1054140X 1955-08-29

Publications (1)

Publication Number Publication Date
US2836683A true US2836683A (en) 1958-05-27

Family

ID=9596274

Family Applications (1)

Application Number Title Priority Date Filing Date
US568311A Expired - Lifetime US2836683A (en) 1955-08-29 1956-02-28 Arc-extinction casing for circuit-breaker

Country Status (5)

Country Link
US (1) US2836683A (da)
BE (1) BE545609A (da)
DE (1) DE1054140B (da)
FR (1) FR1130577A (da)
GB (1) GB801760A (da)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3073936A (en) * 1958-10-01 1963-01-15 Gen Electric Electric circuit interrupter
US3649791A (en) * 1969-07-02 1972-03-14 Bbc Brown Boveri & Cie Arc chute for electrical switch apparatus
US4254314A (en) * 1977-09-15 1981-03-03 Siemens Aktiengesellschaft Arcing chamber with perforated plates of sieve-like ceramics
US4256937A (en) * 1978-06-16 1981-03-17 Square D Company Electromagnetic contactor arc chute

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1104019B (de) * 1959-09-11 1961-04-06 Continental Elektro Ind Ag Lichtbogenloeschkammer fuer elektrische Leistungsschalter
BE635433A (da) * 1962-07-27
DE1253333B (de) * 1964-11-23 1967-11-02 Stotz Kontakt Gmbh Lichtbogenloeschkammer mit Deionblechen
GB2125626B (en) * 1982-08-07 1986-04-03 Terence Henry Taylor Arc interruption in air break switch

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1836994A (en) * 1927-11-17 1931-12-15 Westinghouse Electric & Mfg Co Circuit interrupter
US2215797A (en) * 1938-07-20 1940-09-24 Westinghouse Electric & Mfg Co Circuit interrupter
US2292158A (en) * 1941-05-28 1942-08-04 Gen Electric Gas blast circuit breaker
US2293452A (en) * 1939-10-11 1942-08-18 Gen Electric Electric air circuit breaker
US2393164A (en) * 1943-02-27 1946-01-15 Gen Electric Electric circuit breaker
US2555993A (en) * 1949-06-22 1951-06-05 Gen Electric Circuit interrupter
US2633518A (en) * 1948-07-01 1953-03-31 Roller Smith Corp Air circuit breaker
GB732196A (en) * 1952-07-31 1955-06-22 Telemecanique Electrique Improvements in electrical circuit-breaker apparatus

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE728612C (de) * 1934-10-20 1942-11-30 Siemens Ag Schalter mit Lichtbogenkammer
DE669511C (de) * 1935-05-03 1938-12-30 Wilhelm Leyhausen Funkenkammer fuer Kleinselbstschalter
DE730678C (de) * 1937-05-08 1943-01-15 Siemens Ag Lichtbogenkammer
DE705619C (de) * 1939-08-03 1941-05-05 Siemens Schuckertwerke Akt Ges Installationsselbstschalter
US2293513A (en) * 1939-10-11 1942-08-18 Gen Electric Electric air circuit breaker
FR895927A (fr) * 1943-04-08 1945-02-07 Delle Atel Const Electr Dispositif d'échappement des gaz pour disjoncteurs à auto-soufflage
NL118168B (da) * 1943-07-06
DE914870C (de) * 1944-06-29 1954-07-12 Siemens Ag Lichtbogenkammer
FR1016148A (fr) * 1949-04-29 1952-11-03 Asea Ab Four électrique à courants de foucault
US2615109A (en) * 1949-12-10 1952-10-21 Gen Electric Zigzag magnetic labyrinth arc muffler

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1836994A (en) * 1927-11-17 1931-12-15 Westinghouse Electric & Mfg Co Circuit interrupter
US2215797A (en) * 1938-07-20 1940-09-24 Westinghouse Electric & Mfg Co Circuit interrupter
US2293452A (en) * 1939-10-11 1942-08-18 Gen Electric Electric air circuit breaker
US2292158A (en) * 1941-05-28 1942-08-04 Gen Electric Gas blast circuit breaker
US2393164A (en) * 1943-02-27 1946-01-15 Gen Electric Electric circuit breaker
US2633518A (en) * 1948-07-01 1953-03-31 Roller Smith Corp Air circuit breaker
US2555993A (en) * 1949-06-22 1951-06-05 Gen Electric Circuit interrupter
GB732196A (en) * 1952-07-31 1955-06-22 Telemecanique Electrique Improvements in electrical circuit-breaker apparatus

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3073936A (en) * 1958-10-01 1963-01-15 Gen Electric Electric circuit interrupter
US3649791A (en) * 1969-07-02 1972-03-14 Bbc Brown Boveri & Cie Arc chute for electrical switch apparatus
US4254314A (en) * 1977-09-15 1981-03-03 Siemens Aktiengesellschaft Arcing chamber with perforated plates of sieve-like ceramics
US4256937A (en) * 1978-06-16 1981-03-17 Square D Company Electromagnetic contactor arc chute

Also Published As

Publication number Publication date
FR1130577A (fr) 1957-02-07
DE1054140B (de) 1959-04-02
GB801760A (en) 1958-09-17
BE545609A (da)

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