EP0359467A2 - Disjoncteur à propulseur d'arc - Google Patents

Disjoncteur à propulseur d'arc Download PDF

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Publication number
EP0359467A2
EP0359467A2 EP89309023A EP89309023A EP0359467A2 EP 0359467 A2 EP0359467 A2 EP 0359467A2 EP 89309023 A EP89309023 A EP 89309023A EP 89309023 A EP89309023 A EP 89309023A EP 0359467 A2 EP0359467 A2 EP 0359467A2
Authority
EP
European Patent Office
Prior art keywords
circuit breaker
conductor
arc
contact
contacts
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Withdrawn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
EP89309023A
Other languages
German (de)
English (en)
Other versions
EP0359467A3 (fr
Inventor
Stephen Albert Mrenna
Jere Lee Mckee
William Ellsworth Beatty, Jr.
Yun-Ko Nickey Chien
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.)
CBS Corp
Original Assignee
Westinghouse Electric Corp
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 Westinghouse Electric Corp filed Critical Westinghouse Electric Corp
Publication of EP0359467A2 publication Critical patent/EP0359467A2/fr
Publication of EP0359467A3 publication Critical patent/EP0359467A3/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Withdrawn legal-status Critical Current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
    • H01H33/02—Details
    • H01H33/04—Means for extinguishing or preventing arc between current-carrying parts
    • H01H33/08—Stationary parts for restricting or subdividing the arc, e.g. barrier plate
    • 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
    • H01H9/46—Means for extinguishing or preventing arc between current-carrying parts using arcing horns

Definitions

  • This invention relates to an electric circuit breaker having an arc gun for impelling an arc from between the contacts into an arc extinguisher.
  • molded case circuit breakers are provided with operating mechanisms that include movable contacts that provide protection for an electrical circuit or system against electrical faults, such as low level short circuit, fault circuit conditions, and, in some cases, high level short circuit or fault current conditions.
  • Circuit breakers usually employ a trip mechanism for controlling the movement of an overcenter toggle mechanism to separate a pair of electrical contacts when an overload condition occurs.
  • a circuit breaker comprises an insulating housing having line and lead terminals, a circuit breaker structure within the housing and having stationary and movable contacts operable between open and closed positions, a contact arm carrying the movable contact, means coupled with the contact arm for opening and closing the contacts, an arc extinguisher disposed adjacent to the contact arm, U-­shaped means comprising a U-leg extending on opposite sides of the stationary contact, the U-shaped means being susceptible to a magnetic field extending between the U-­legs in a zone on the side of the stationary contact facing the movable contact and perpendicular to the path of current through a conductor when a current passes through the conductor so as to drive any arc occurring between the opening of the contacts toward the arc extinguisher, and a fiber barrier disposed between the stationary contact and at least one of the U-legs, so as to emit an arc cooling gas directed to any arc formed during contact separation.
  • a fixed conductor extends to support the stationary contact
  • a U-shaped member comprising a U-leg extending on opposite sides of at least one of the contacts and being susceptible to a magnetic field extending between the U-legs in a zone on the side of each contact facing the other contact, which zone is perpendicular to the path of current through the conductor when the current passes through the conductor so as to drive any arc occurring between the opening contacts open toward the arc extinguisher, an insulating barrier disposed between at least one of the contacts and at least one of the corresponding U-legs for avoiding thermal damage to the U-legs.
  • An object of this invention is that it increases the magnetic field between the contacts to drive the arc into the arc extinguisher, and a gas evolving means evolves cooling gas on contact separation.
  • Figure 1 shows a circuit breaker 11 comprising an insulating housing 13 and a circuit breaker mechanism 15 supported within the housing.
  • the portion of the housing shown comprises an insulating base; a correspond­ing insulating cover is not shown.
  • the circuit breaker mechanism 15 comprises an operating mechanism including a latch and trip device 17.
  • the circuit breaker 11 is of the type that is described in the specification of U.S. Patent 3,797,009.
  • the circuit breaker 11 is a three-pole structure comprising three compartments disposed in side-by-side relationship.
  • the center pole compartment (Fig. 1) is separated from the two outer pole compartments by insulating barrier walls formed with the housing base 13 and the cover.
  • the circuit breaker mechanism 15 is disposed in the center pole com­partment and is a single operating mechanism for operating the contacts of all three pole units.
  • Each pole unit comprises a stationary contact 19 that is fixedly secured on a rigid main conductor 21, that in turn is secured to the base 13 by bolt 23.
  • a movable contact 25 is secured, such as by welding or brazing to a contact arm 27 that is mounted on the pivot pin 29.
  • the contact arm 27 for all three pole units is supported at one end thereof and is rigidly connected on a common insulating tie bar 31 by which the arms of all three pole units move in unison.
  • Each of the contact arms 27 is biased about the associated pivot pin 29.
  • the operating mechanism 15 actuates the contact arm 27 between open and closed positions.
  • the closed position of the arm is indicated at 27a.
  • the mechanism comprises an overcenter toggle structure similar to that shown in the specification of U.S. Patent No. 3,797,009.
  • the mechanism includes an integral handle 33 to enable manual operation of the breaker.
  • the circuit breaker is manually operated to the open position by movement of the handle 33 in a clockwise direction, whereby the overcenter toggle mechanism functions with the contact arm 27 for all pole units in the position shown in Fig. 1 in a manner well known in the art.
  • the circuit breaker is manually closed by counterclockwise movement of the handle 33 from the "off" position to the "on” position by movement of the handle to the broken-line position 33a, whereby the contact arm moves to the broken-line position 27a.
  • Movement of the contact arm from the closed position 27a to the open position 27 may also be accom­plished automatically by the trip device 17 in response to predetermined overload conditions in the circuit breaker through any or all of the pole units in the circuit breaker as described in the specification of U.S. Patent No. 3,797,009.
  • a circuit through each pole unit extends from a left-hand terminal 35 through the conductor 21, the contacts 19, 25, the contact arm 27, a flexible conductor 28, a conductor 39, and to a right hand terminal connector 41.
  • the conductor 21 comprises means for impelling an arc out of the contacts and into an arc extinguisher.
  • an arc gun or impeller 43 and a insulating support block 45 are disposed between the upper and lower portions of the conductor 21.
  • the gun or impeller 43 is a U-shaped member of ferromagnetic material and serves as a core for assembling and directing a magnetic field between the space U-legs 49, 51 of the impeller 43, the lower ends of which U-legs are integral portions of a bight portion 43.
  • the bight portion is clamped (Fig. 6) between the conductor 21 and the insulating support block 45.
  • a sheet of insulation 55 is disposed between the conductor 21 and the bight portion 43.
  • the conductor 21 is comprised of a metal having a high coefficient of electrical conductivity, such as copper, which serves as a winding for the U-shaped core. Accordingly, when carrying a current, the magnetic field 47 (Fig. 4) extends in a zone across and above the stationary contact 19.
  • an arc extinguisher 57 (Fig. 1) comprised of a plurality of spaced stacked metal plates 59 which are secured in place between a pair of insulating plates or fiber board 61, 63.
  • an electromagnetic field 67 (Fig. 5) occurs, encircling the current conducting arc whose field rotates counter­clockwise about the arc 65 with the lower portion of the field 67 (as viewed in Fig. 5) complimenting the field lines 47a on the lower side of the arc 65.
  • the upper portion of the field 67 moves against the field lines 47b and therefore reduces the force of the field lines 47b, whereby the arc 65 moves in the direction of the arrow 69 away from the contact 19 and into the plates 59 of the arc extinguisher 57.
  • a conductor 71 corresponding to the conductor 21 includes an arc gun or impeller 73 as an integral part thereof.
  • the conductor 71 and the arc gun 73 are preferably comprised of laminated material including layers 75 and 77.
  • the layer 75 is comprised of a ferromagnetic material to provide the magnetic field and the layer 77 is comprised of a metal of a high coefficient of electrical conductivity, such as copper, on which the contact 19 is secured.
  • only two laminated layers 75, 77 are shown instead of a plurality thereof.
  • FIG. 8 A third embodiment of the invention is shown in Fig. 8 in which similar numerals refer to similar parts.
  • an arc gun or impeller 79 is mounted on the contact arm 27 in an inverted U-shaped position.
  • the arc gun 79 is comprised of a ferromagnetic material in order to provide a magnetic field 81 across the contact 25. Accordingly, when the contacts 19, 25 separate with the movable contact in the broken line position 25a, the arc gun 79a provides the magnetic field to act upon an arc (not shown) extending between the contacts 19, 25a and thereby impel the arc away from the contacts and into the arc plates 59, in a manner similar to that shown in Fig. 5.
  • Fig. 8 A third embodiment of the invention is shown in Fig. 8 in which similar numerals refer to similar parts.
  • an arc gun or impeller 79 is mounted on the contact arm 27 in an inverted U-shaped position.
  • the arc gun 79 is comprised of a ferromagnetic material in order
  • a pair of arc guns or impellers 43, 79 cooperate to rapidly move an arc into the arc extinguisher 57.
  • the second arc gun 79 is provided with the embodiment of the invention shown in Fig. 5, it is also applicable to the embodiment shown in Fig. 7 in which the arc gun is integral with the conductor 71 as well as the contact arm 27.
  • a pair of insulating plates 83, 85 are disposed between the contact 19 and the U-legs.
  • the upper portions of the plates 83, 85 are secured such as by rivets 87 to the corresponding fiber board 61, 63 with spacers 89 between the plates 83, 85 and the corresponding fiber boards 61, 63 to provide clearance of the U-legs 49, 51.
  • the insulators 83, 85 provide thermal protection for adjacent parts of the circuit breaker including the U-legs 49, 51
  • the in­sulators may also have another purpose. Where the in­sulators are comprised of fiber board, they emit gas, such as hydrogen, for cooling an arc. This is particularly advantageous where the circuit breaker is rated at greater than 480 volts.

Landscapes

  • Breakers (AREA)
  • Arc-Extinguishing Devices That Are Switches (AREA)
EP19890309023 1988-09-12 1989-09-06 Disjoncteur à propulseur d'arc Withdrawn EP0359467A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US24298288A 1988-09-12 1988-09-12
US242982 1994-05-16

Publications (2)

Publication Number Publication Date
EP0359467A2 true EP0359467A2 (fr) 1990-03-21
EP0359467A3 EP0359467A3 (fr) 1991-06-12

Family

ID=22916877

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19890309023 Withdrawn EP0359467A3 (fr) 1988-09-12 1989-09-06 Disjoncteur à propulseur d'arc

Country Status (7)

Country Link
EP (1) EP0359467A3 (fr)
JP (1) JPH02119018A (fr)
KR (1) KR900005515A (fr)
CN (1) CN1041476A (fr)
AU (1) AU4012289A (fr)
BR (1) BR8904551A (fr)
ZA (1) ZA896375B (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2761194A1 (fr) * 1997-03-20 1998-09-25 Schneider Electric Sa Pole de coupure d'un appareil interrupteur electrique
CN102592908A (zh) * 2012-02-22 2012-07-18 西安交通大学 一种中压直流断路器小电流电弧磁吹装置及其吹弧方法
EP2605265A1 (fr) * 2010-08-12 2013-06-19 Fuji Electric Fa Components & Systems Co., Ltd. Coupe circuit
WO2015117998A2 (fr) 2014-02-04 2015-08-13 Autoliv Development Ab Coupe-circuit pyrotechnique
US20170098521A1 (en) * 2014-05-16 2017-04-06 Beijing People's Electric Plant Co., Ltd. Breaker facilitating rapid movement and elongation of arc

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002140970A (ja) * 2000-10-31 2002-05-17 Nitto Electric Works Ltd 開閉器の接触子
KR100475067B1 (ko) * 2002-09-10 2005-03-10 엘지산전 주식회사 회로차단기의 소호장치
DE20316027U1 (de) * 2003-10-18 2004-01-15 Moeller Gmbh Elektrisches Schaltgerät mit Einrichtung zur Lichtbogenlöschung
JP4419642B2 (ja) * 2004-03-30 2010-02-24 富士電機機器制御株式会社 回路遮断器の消弧装置
JP2007280928A (ja) * 2006-03-13 2007-10-25 Fuji Electric Fa Components & Systems Co Ltd 回路遮断器
JP5256667B2 (ja) * 2007-08-27 2013-08-07 富士電機機器制御株式会社 回路遮断器
JP5515719B2 (ja) * 2009-12-18 2014-06-11 富士電機機器制御株式会社 回路遮断器
JP5688768B2 (ja) * 2011-05-24 2015-03-25 一般財団法人電力中央研究所 アークによる密閉容器内の圧力上昇の抑制方法および電気機器

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1009698B (de) * 1954-07-19 1957-06-06 Siemens Ag Anordnung bei elektrischen Schaltkontakten
FR78958E (fr) * 1960-12-28 1962-10-05 Interrupteur de neutre
DE2159756B1 (de) * 1971-12-02 1973-05-24 Siemens AG, 1000 Berlin u 8000 München U-foermig gekroepftes kontaktstueck
FR2365874A1 (fr) * 1976-09-28 1978-04-21 Siemens Ag Dispositif de contact pour disjoncteurs, en particulier pour disjoncteurs de protection de ligne
EP0033479A1 (fr) * 1980-01-31 1981-08-12 CGE- COMPAGNIA GENERALE ELETTROMECCANICA S.p.A. Dispositif d'extinction d'arc pour disjoncteurs limiteurs de courant électrique
US4654491A (en) * 1986-03-03 1987-03-31 Westinghouse Electric Corp. Circuit breaker with contact support and arc runner

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1009698B (de) * 1954-07-19 1957-06-06 Siemens Ag Anordnung bei elektrischen Schaltkontakten
FR78958E (fr) * 1960-12-28 1962-10-05 Interrupteur de neutre
DE2159756B1 (de) * 1971-12-02 1973-05-24 Siemens AG, 1000 Berlin u 8000 München U-foermig gekroepftes kontaktstueck
FR2365874A1 (fr) * 1976-09-28 1978-04-21 Siemens Ag Dispositif de contact pour disjoncteurs, en particulier pour disjoncteurs de protection de ligne
EP0033479A1 (fr) * 1980-01-31 1981-08-12 CGE- COMPAGNIA GENERALE ELETTROMECCANICA S.p.A. Dispositif d'extinction d'arc pour disjoncteurs limiteurs de courant électrique
US4654491A (en) * 1986-03-03 1987-03-31 Westinghouse Electric Corp. Circuit breaker with contact support and arc runner

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2761194A1 (fr) * 1997-03-20 1998-09-25 Schneider Electric Sa Pole de coupure d'un appareil interrupteur electrique
EP2605265A1 (fr) * 2010-08-12 2013-06-19 Fuji Electric Fa Components & Systems Co., Ltd. Coupe circuit
EP2605265A4 (fr) * 2010-08-12 2014-09-10 Fuji Elec Fa Components & Sys Coupe circuit
CN102592908A (zh) * 2012-02-22 2012-07-18 西安交通大学 一种中压直流断路器小电流电弧磁吹装置及其吹弧方法
WO2015117998A2 (fr) 2014-02-04 2015-08-13 Autoliv Development Ab Coupe-circuit pyrotechnique
US10068732B2 (en) 2014-02-04 2018-09-04 Autoliv Development Ab Pyrotechnic circuit breaker
US10431406B2 (en) 2014-02-04 2019-10-01 Autoliv Development Ab Pyrotechnic circuit breaker
US20170098521A1 (en) * 2014-05-16 2017-04-06 Beijing People's Electric Plant Co., Ltd. Breaker facilitating rapid movement and elongation of arc
JP2017515279A (ja) * 2014-05-16 2017-06-08 ベイジン・ピープルズ・エレクトリック・プラント・カンパニー・リミテッド 電弧の急速移動と伸長に有利な遮断器
US10026578B2 (en) * 2014-05-16 2018-07-17 Beijing People's Electric Plant Co., Ltd. Breaker facilitating rapid movement and elongation of arc

Also Published As

Publication number Publication date
EP0359467A3 (fr) 1991-06-12
KR900005515A (ko) 1990-04-14
AU4012289A (en) 1990-03-15
CN1041476A (zh) 1990-04-18
JPH02119018A (ja) 1990-05-07
ZA896375B (en) 1990-05-30
BR8904551A (pt) 1990-04-24

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