EP1471553B1 - Luftunterbrecherschalter - Google Patents

Luftunterbrecherschalter Download PDF

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Publication number
EP1471553B1
EP1471553B1 EP02710413A EP02710413A EP1471553B1 EP 1471553 B1 EP1471553 B1 EP 1471553B1 EP 02710413 A EP02710413 A EP 02710413A EP 02710413 A EP02710413 A EP 02710413A EP 1471553 B1 EP1471553 B1 EP 1471553B1
Authority
EP
European Patent Office
Prior art keywords
contact
moving
arc
stationary
circuit 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
EP02710413A
Other languages
English (en)
French (fr)
Other versions
EP1471553A1 (de
EP1471553A4 (de
Inventor
Hiroshi Mitsubishi Elec. Engineering KK OKASHITA
Junichi Mitsubishi Elec. Engineering KK KAWAKAMI
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi 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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Publication of EP1471553A1 publication Critical patent/EP1471553A1/de
Publication of EP1471553A4 publication Critical patent/EP1471553A4/de
Application granted granted Critical
Publication of EP1471553B1 publication Critical patent/EP1471553B1/de
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
    • H01H9/342—Venting arrangements for arc chutes
    • 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
    • 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
    • H01H33/53—Cases; Reservoirs, tanks, piping or valves, for arc-extinguishing fluid; Accessories therefor, e.g. safety arrangements, pressure relief devices
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H73/00—Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism
    • H01H73/02—Details
    • H01H73/18—Means for extinguishing or suppressing arc
    • 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
    • H01H9/52—Cooling of switch parts
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/12—Contacts characterised by the manner in which co-operating contacts engage
    • H01H1/14—Contacts characterised by the manner in which co-operating contacts engage by abutting
    • H01H1/22—Contacts characterised by the manner in which co-operating contacts engage by abutting with rigid pivoted member carrying the moving contact
    • H01H1/221—Contacts characterised by the manner in which co-operating contacts engage by abutting with rigid pivoted member carrying the moving contact and a contact pressure spring acting between the pivoted member and a supporting member
    • H01H1/226—Contacts characterised by the manner in which co-operating contacts engage by abutting with rigid pivoted member carrying the moving contact and a contact pressure spring acting between the pivoted member and a supporting member having a plurality of parallel contact bars
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/62—Heating or cooling of contacts
    • 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
    • H01H9/342—Venting arrangements for arc chutes
    • H01H2009/343—Venting arrangements for arc chutes with variable venting aperture function of arc chute internal pressure, e.g. resilient flap-valve or check-valve

Definitions

  • the present invention relates to a structure for suppressing rise in temperature of a current-carrying conductor at a opening and closing contact as well as in the vicinity of the contact in an air circuit breaker at the time of applying an electric current to the conductor under normal conditions.
  • Fig. 3 is a side sectional view showing a conventional air circuit breaker described in, for example, the Japanese Patent Publication (unexamined) No. 303930/1993.
  • reference numeral 1 is a base housing comprised of a main base 1a and a secondary base 1b both formed of an insulating material.
  • Numeral 1c is an arc gas emission window formed on the base housing 1.
  • Numeral 2 is a cover housing, numeral 3 are stationary conductors disposed in parallel on the secondary base 1b and are the same in number as the poles of this air circuit breaker, and in which a stationary contact 4 is fixed onto one end of each stationary conductor, and the other end is led out from the base housing 1 and forms a terminal 3a on the power supply side.
  • Numeral 5 is a moving contact that faces the stationary contact 4 and comes in contact with and separates from the stationary contact 4, and numeral 6 is a moving member to which the moving contact 5 is fixed.
  • Numeral 7 is a contact arm rotatably holding the moving member 6
  • numeral 8 is a moving member stopper pin for blocking movement of the moving member 6 toward any unnecessary portion
  • numeral 9 is a contact arm shaft rotatably supporting the contact arm 7 on the base housing 1.
  • Numeral 10 is a terminal conductor, and a part of the terminal conductor fixed to the main base 1a and led out from the base housing 1 forms a load side terminal 10a.
  • Numeral 11 is a flexible conductor for connecting the moving member 6 to the terminal conductor 10 so as not to regulate movement of the moving member 6.
  • Numeral 12 is a contact pressure spring for urging the moving member 6 in the opening direction
  • numeral 13 is a switch mechanism part for opening and closing the moving member 6 connected to the contact arm 7 by a shaft 14.
  • Numeral 15 is a trip relay part.
  • the switch mechanism part 13 is comprised of a widely known toggle link mechanism and is latched on a D-shape latch 16 engaged with the trip relay part 15.
  • Numeral 17 is an arc extinguishing chamber having an opening so that arc gas can be emitted to outside through the arc gas emission window 1c.
  • Numeral 18 is a closing spring where closing drive force of the switch mechanism part 13 is accumulated
  • numeral 19 is a ratchet mechanism where the closing spring 18 is compressed and accumulated by a handle 20 or a motor not illustrated.
  • This type of conventional air circuit breaker detects an overcurrent flowing through a connected load or an excessive current caused by an accident or the like, and the trip relay part 15 releases the switch mechanism part 13 from the D-shape latch 16. Consequently, the switch mechanism part 13 is put into operation, the contact arm 7 is pushed upward turning round the contact arm shaft 9-by the force of the contact pressure spring 12. At the same time, the moving member 6 is rotated counterclockwise turning round the shaft 14, the moving contact 5 is moved away from the stationary contact 4, and the electric current flowing between the two contacts is interrupted. At this time, an arc between the contacts is induced and extinguished by the arc extinguishing chamber 17, and arc gas produced in this process is emitted through the arc gas emission window 1c.
  • a maximum temperature of a current-carrying part is normalized by a standard.
  • the stationary contact 4, the moving contact 5, and peripheral conductive passages such as the moving member 6, etc. are arranged in a closed space having only the arc gas emission window 1c in order to insulate a current-carrying charging part and shield an arc generated at the time of interrupting an excessive electric current and prevent arc gas from leaking to the switch mechanism part 13.
  • the present invention was made to solve the above-discussed problem and has an object of suppressing rise in temperature at the current-carrying part in the air circuit breaker by effectively radiating a heat generated in the air circuit breaker.
  • An air circuit breaker includes in a housing: a stationary conductor onto which a stationary contact is fixed; a moving member onto which a moving contact coming in contact with and moving away from the stationary contact by a switch mechanism is fixed; and an arc extinguishing chamber for extinguishing an arc generated between the mentioned two contacts; and the air circuit breaker is provided with an emission window formed on a side of said extinguishing chamber of the housing in order to emit arc gas out of the housing and a vent hole that is located on a side opposite of said extinguishing chamber of said housing and forms an air passage in the housing by natural convection from the vent hole to the emission window.
  • the mentioned air circuit breaker is provided with a valve member for closing the vent hole when a pressure rises in the housing.
  • an arc block provided with a stationary arcing contact extending toward the arc extinguishing chamber so as to conduct an electric power and transfer a heat from the stationary contact and a moving arcing contact coming into contact with the stationary arcing contact at the time of opening the two contacts are provided extending toward the arc extinguishing chamber so that the electric power may be conducted and the heat be transferred from the moving contact.
  • one pole is opened and closed by plural moving members, and each of the plural moving members is provided with the moving arcing contact extending toward the arc extinguishing chamber.
  • Fig. 1 is a sectional view of an essential part of an air circuit breaker showing Embodiment 1 according to the present invention
  • Fig. 2 is a perspective view of a current-carrying part of the air circuit breaker of Embodiment 1.
  • numerals 1, 3 to 13, and 17 are the same as those in the mentioned conventional air circuit breaker, and further explanation of them is omitted herein.
  • Numeral 1d is a vent hole opened on the base housing 1 and located on a side opposite of the arc extinguishing chamber 17.
  • Numeral 21 is a valve member of the vent hole 1d, and this valve member 21 allows air to pass from outside to inside of the base housing 1 under normal conditions and closes the vent hole 1d when the pressure in the base housing 1 rises.
  • Numeral 6a is a moving arcing contact arranged by extending a moving member conductor from a portion where the moving contact 5 of the moving member 6 is fixed toward an end.
  • Numeral 22 is an arc block that is mounted on the stationary conductor 3 in the direction of the arc extinguishing chamber 17, and in which one face is closely fitted on the stationary conductor 3 and another face crossing at right angles is closely fitted on a bottom face of the base housing 1.
  • This arc block 22 is provided with a stationary arcing contact 22a formed at a position facing the moving arcing contact 6a.
  • Plural moving members 6 disposed in parallel form an opening and closing part of one pole as shown in Fig. 2.
  • a recess groove 22b is formed on the arc block 22 at a portion with which the moving arcing contact 6a does not come in contact.
  • the air circuit breaker of above construction is installed with the power supply side terminal 3a upward, whereby the arc extinguishing chamber 17 is located at the top and the vent hole 1d is at the bottom side as illustrated in the drawing. Accordingly, an air passage is formed between the vent hole 1d and the arc gas emission window 1c.
  • valve member 21 closes the vent hole 1d by the produced arc gas pressure, and this prevents arc grounding to any metal material located below the vent hole 1d.
  • the switch mechanism continues to push in, whereby the fulcrum shifts to the face where the moving contact 5 is in contact with the stationary contact 4. Consequently, the moving arcing contact 6a separates or moves away from the stationary arcing contact 22a, and the electric current flows through all over the face where the moving contact 5 is in contact with the stationary contact 4.
  • the moving contact 5 In the interruption of the electric current, with the raise of the moving members 6 by the switch mechanism, the moving contact 5 is slightly moved away from the stationary contact 4, and the electric current is applied to between the two contacts through an arc. Subsequently, the moving members 6 are pushed by the contact pressure spring 12 and rotated clockwise round the shaft 14, and the moving arcing contact 6a comes in contact with the stationary arcing contact 22a. At this point of time, the current flows through the point where the moving arcing contact 6a is in contact with the stationary arcing contact 22a in parallel with the arc current between the two contacts.
  • the moving arcing contact 6a and the arc block 22 both connected with the contact face where the moving contact 5 is in contact with the stationary contact 4 and a heat is mainly generated, act as a heat radiation member cooled by convection air in the air passage between the vent hole 1d and the arc gas emission window 1c, and therefore the current-carrying part is restrained from rise in temperature.
  • the opening and closing part of one pole is comprised of plural moving members 6 including the moving arcing contacts 6a arranged in parallel, and therefore the moving arcing contacts 6a have a large heat radiation area as a whole.
  • the arc block 22 is provided with recess grooves 22b formed along the direction of airflow, and therefore the heat radiation area is increased and heat radiation effect is improved.
  • the arc block 22 forming the stationary arcing contact 22a has one face tightly fitted on the stationary conductor 3 and another face tightly fitted on the bottom face of the base housing 1, and therefore any heat in the stationary contact 4 is transferred to the arc block 22 via the stationary conductor 3. Then, the radiation of heat by the mentioned convection air and the radiation of heat from the rear face to the outside air through the bottom face of the base housing 1 are promoted, and the current-carrying part is suppressed from rise in temperature. In this sense, if the bottom rear face of the base housing 1 is corrugated to increase the heat radiation area in the bottom rear face, the heat radiation effect will be improved all the more.
  • an air circuit breaker includes in a housing: a stationary conductor onto which a stationary contact is fixed; a moving member onto which a moving contact coming in contact with and separating from the stationary contact by a switch mechanism is fixed; and an arc extinguishing chamber for extinguishing an arc generated between the mentioned two contacts; and the air circuit breaker is provided with an emission window formed on a part of the housing in order to emit arc gas out of the housing and a vent hole that is opened at a portion facing the mentioned emission window and forms an air passage in the housing, and as a result, air convection from the vent hole to the emission window in the housing cools the contacts and a current-carrying part in the vicinity of the contacts, and a rise in temperature due to a heat generated by the flowing current is suppressed.
  • the mentioned air circuit breaker is provided with a valve member for closing the vent hole when a pressure rises in the housing, and as a result, the valve member prevents arc gas from blowing out through the vent hole when the current is interrupted due to any accident.
  • an arc block provided with a stationary arcing contact extending toward the arc extinguishing chamber so as to conduct an electric power and transfer a heat from the stationary contact and a moving arcing contact coming into contact with the stationary arcing contact at the time of opening the two contacts are provided extending toward the arc extinguishing chamber so that the electric power can be conducted and the heat be transferred from the moving contact, and as a result, the arc block and the moving arcing contact, to which any electric current is not applied when the contacts are connected under normal conditions, can be increased in heat radiation area and cooled effectively.
  • one pole is opened and closed by plural moving members, and each of the plural moving members is provided with the moving arcing contact extending toward the arc extinguishing chamber, and as a result, all of the moving arcing contacts act as radiation fins, and the heat radiation area is increased more. It is therefore possible to suppress rise in temperature of the current-carrying part of the air circuit breaker within a range of regulated maximum temperature.

Claims (4)

  1. (Druck-)Luftkreisunterbrechungsschalter umfassend:
    einen stationären Konduktor (3), an dem ein stationärer Kontakt (4) fixiert ist,
    ein bewegliches Element (6), an dem ein beweglicher Kontakt (5) fixiert ist, der in Kontakt kommt mit und sich weg bewegt von dem stationären Kontakt (4) mittels eines Schaltmechanismus, und
    eine Lichtbogenlöschkammer (17) zum induzieren und löschen eines Lichtbogens, der zwischen dem beweglichen Kontakt (5) und dem stationären Kontakt (4) erzeugt ist,
    wobei der stationäre Konduktor (4), das bewegliche Element (6) und die Lichtbogenlöschkammer (17) in einem Gehäuse (1) angeordnet sind und
    der Luftkreisunterbrechungsschalter dadurch gekennzeichnet ist, dass dieser weiter umfasst:
    ein Emissionsfenster (1c), das an der Seite der Löschkammer (17) des Gehäuses (1) ausgebildet ist, um ein Lichtbogengas von dem Gehäuse (1) nach oben zu der Außenseite des Gehäuses (1) zu emittieren und
    eine Entlüftungsbohrung (1d), die an einer Seite gegenüber der Lichtbogenlöschkammer (17) des Gehäuses (1) angeordnet ist, und welches einen Luftdurchlass durch natürliche Konvektion von der Entlüftungsbohrung (1d) zu dem Emissionsfenster (1c) bildet.
  2. Luftkreisunterbrechungsschalter gemäß Anspruch 1, dadurch gekennzeichnet, dass
    dieser weiter ein Ventilelement (21) zum Schließen der Entlüftungsbohrung (1c), falls ein Druck in dem Gehäuse (1) ansteigt, umfasst.
  3. Luftkreisunterbrechungsschalter gemäß Anspruch 1 oder 2,
    dadurch gekennzeichnet, dass
    ein Lichtbogenblock (22), der mit einem stationären Lichtbogenbildungskontakt (22a) ausgebildet ist, welcher sich zu der Lichtbogenlöschkammer (17) erstreckt, um so eine elektrische Energie zu leiten und Wärme von dem stationären Kontakt (4) zu übertragen, und ein beweglicher Lichtbogenbildungskontakt (6a), der mit dem stationären Lichtbogenbildungskontakt (22) in Kontakt kommt, zu einem Zeitpunkt, in dem die zwei Kontakte (4) und (5) sich öffnen, ausgebildet sind, welche sich zu der Lichtbogenlöschkammer (17) erstrecken, so dass die elektrische Energie geleitet werden kann und die Wärme von dem beweglichen Kontakt (5) übertragen werden kann.
  4. Luftkreisunterbrechungsschalter gemäß Anspruch 3,
    dadurch gekennzeichnet, dass
    ein Pol mittels mehrerer beweglicher Elemente (6) geöffnet und geschlossen wird und jedes der mehreren beweglichen Elemente (6) mit dem beweglichen Lichtbogenbildungskontakt (6a), der sich zu der Lichtbogenlöschkammer (17) erstreckt, ausgebildet ist.
EP02710413A 2002-01-31 2002-01-31 Luftunterbrecherschalter Expired - Lifetime EP1471553B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2002/000739 WO2003065396A1 (fr) 2002-01-31 2002-01-31 Disjoncteur pneumatique

Publications (3)

Publication Number Publication Date
EP1471553A1 EP1471553A1 (de) 2004-10-27
EP1471553A4 EP1471553A4 (de) 2005-04-06
EP1471553B1 true EP1471553B1 (de) 2006-05-17

Family

ID=27639268

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02710413A Expired - Lifetime EP1471553B1 (de) 2002-01-31 2002-01-31 Luftunterbrecherschalter

Country Status (8)

Country Link
EP (1) EP1471553B1 (de)
JP (1) JP4138665B2 (de)
KR (1) KR100552413B1 (de)
CN (1) CN1253909C (de)
DE (1) DE60211562T2 (de)
ES (1) ES2262784T3 (de)
TW (1) TW540078B (de)
WO (1) WO2003065396A1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10134553B2 (en) 2014-12-18 2018-11-20 Abb Schweiz Ag Contact arms for use in electrical switchgear and methods of fabricating same

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100728863B1 (ko) 2006-02-16 2007-06-19 엘에스산전 주식회사 기중 회로 차단기의 소호장치
US7294804B1 (en) * 2007-03-29 2007-11-13 Eaton Corporation Energy dissipating spring seat
JP4753263B2 (ja) * 2008-10-10 2011-08-24 三菱電機株式会社 回路遮断器
CN101847553A (zh) * 2010-06-07 2010-09-29 湖北盛佳电器设备有限公司 一种能够提高分断能力的断路器
CN102005345B (zh) * 2010-11-11 2012-11-21 江苏辉能电气有限公司 一种塑壳低压断路器的灭弧模块
EP2573789B1 (de) * 2011-09-21 2016-08-24 Siemens Aktiengesellschaft Leistungsschalter mit Lüftungskanälen für einen effizienten Wärmeabtransport
AU2017253327B2 (en) * 2016-04-22 2019-06-20 Mitsubishi Electric Corporation Contactor device for circuit breaker and circuit breaker using same contactor device
KR20220061718A (ko) 2020-11-06 2022-05-13 엘에스일렉트릭(주) 아크 소호부 및 이를 포함하는 기중 차단기

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Publication number Priority date Publication date Assignee Title
GB855730A (en) * 1957-03-27 1960-12-07 Chilton Electric Products Ltd Improvements in and relating to electrical circuit-breakers
JPS5882440A (ja) * 1981-11-12 1983-05-18 三菱電機株式会社 開閉装置
JPS5882441A (ja) * 1981-11-12 1983-05-18 三菱電機株式会社 開閉装置
FR2682531B1 (fr) * 1991-10-15 1993-11-26 Merlin Gerin Disjoncteur multipolaire a blocs unipolaires.
JP2882186B2 (ja) * 1992-02-26 1999-04-12 三菱電機株式会社 回路遮断器
JPH0831296A (ja) * 1994-07-14 1996-02-02 Fuji Electric Co Ltd 回路遮断器
JP4438102B2 (ja) * 1997-12-02 2010-03-24 日本ゼオン株式会社 電池用バインダー、電池電極用スラリー、リチウム二次電池用電極およびリチウム二次電池

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10134553B2 (en) 2014-12-18 2018-11-20 Abb Schweiz Ag Contact arms for use in electrical switchgear and methods of fabricating same

Also Published As

Publication number Publication date
TW540078B (en) 2003-07-01
ES2262784T3 (es) 2006-12-01
KR100552413B1 (ko) 2006-02-16
KR20030090691A (ko) 2003-11-28
EP1471553A1 (de) 2004-10-27
DE60211562T2 (de) 2007-04-26
EP1471553A4 (de) 2005-04-06
DE60211562D1 (de) 2006-06-22
JPWO2003065396A1 (ja) 2005-05-26
JP4138665B2 (ja) 2008-08-27
CN1494727A (zh) 2004-05-05
WO2003065396A1 (fr) 2003-08-07
CN1253909C (zh) 2006-04-26

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