EP3370246B1 - Leistungsschalter und blende davon - Google Patents

Leistungsschalter und blende davon Download PDF

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Publication number
EP3370246B1
EP3370246B1 EP16858885.3A EP16858885A EP3370246B1 EP 3370246 B1 EP3370246 B1 EP 3370246B1 EP 16858885 A EP16858885 A EP 16858885A EP 3370246 B1 EP3370246 B1 EP 3370246B1
Authority
EP
European Patent Office
Prior art keywords
baffle
arc
static contact
housing
arc angle
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.)
Active
Application number
EP16858885.3A
Other languages
English (en)
French (fr)
Other versions
EP3370246A1 (de
EP3370246A4 (de
Inventor
Weijun GE
Shenhu ZHANG
Changqing ZHOU
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.)
Zhejiang Chint Electrics Co Ltd
SEARI Electric Technology Co Ltd
Original Assignee
Zhejiang Chint Electrics Co Ltd
SEARI Electric Technology Co Ltd
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 Zhejiang Chint Electrics Co Ltd, SEARI Electric Technology Co Ltd filed Critical Zhejiang Chint Electrics Co Ltd
Publication of EP3370246A1 publication Critical patent/EP3370246A1/de
Publication of EP3370246A4 publication Critical patent/EP3370246A4/de
Application granted granted Critical
Publication of EP3370246B1 publication Critical patent/EP3370246B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • 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
    • H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
    • H01H2009/305—Means for extinguishing or preventing arc between current-carrying parts including means for screening for arc gases as protection of mechanism against hot arc gases or for keeping arc gases in the arc chamber
    • 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

  • the present invention relates to the field of low voltage electrical apparatus, more particularly, to a baffle for cutting off arcs and airflow in a circuit breaker.
  • the volume of circuit breaker products is getting smaller and smaller, but the technical performance indexes are getting higher and higher.
  • the high-temperature expansion gas generated by an arc during a short circuit breaking process will interfere with the arc in a limited space.
  • the high-temperature expansion gas will prevent the arc from effectively entering into an arc extinguishing chamber, resulting in a longer staying time of the arc outside the arc extinguishing chamber.
  • the long time staying of the arc outside the arc extinguishing chamber for example, staying in an arc channel will cause a longer breaking time and reduction in performance indexes.
  • the long time staying arc will also cause severe burning of an arcing plate, a movable contact and a static contact.
  • the mounting switch comprises a housing, a contact assembly in the pre-chamber, an arc extinguishing chamber, and first and second arc guides.
  • the contact assembly comprises a static contact and a movable contact.
  • the first and second arc guides lead the arc generated at the contact assembly at the time of switching on to the arc extinguishing chamber.
  • the first arc guide is associated with the static contact, wherein the pre-chamber has a plurality of protruding guide ribs on at least one sub-surface inside the housing.
  • the protruding guide ribs are arranged from an area of the contact assembly to an area of the arc extinguishing chamber approximately along the direction of travel of the arc.
  • the pre-chamber has, on at least one sub-surface inside the housing, protruding tabs with an annular closed peripheral contour in the area of the static contact.
  • the protruding tabs are arranged between the guide ribs adjacent to the static contact and the first arc guide, so that a circulation of gas flowing around the tab may be configured between the guide rib adjacent to the static contact and the first arc guide.
  • the circuit breaker disclosed in CN103123872A considers the phenomenon of arc backflow in the arc angle area of the static contact, and designs a return circulation structure in the static contact and the arc angle area.
  • the circuit breaker of CN103123872A guides the airflow inside the arc angle area, reduces the backflow of the airflow inside the arc angle area, and mitigates the obstruction of the arc entering into the arc extinguishing chamber caused by the airflow in the arc angle area.
  • the airflow close to the arc angle, especially the airflow just above the arc angle will also have a significant influence on the arc.
  • CN103123872A does not perform any treatment on the airflow outside the arc angle area, so the arc will still stay for a long time as a result of the impact of the airflow in this area.
  • CN 1 758 396 A describes a circuit breaker with baffles within curved portions of fixed contacts
  • a circuit breaker comprises a housing and a first baffle and a second baffle provided on both sides of the housing, wherein the first baffle on one side of the housing is located inside an arc angle of a static contact, and the first baffle cuts off a space inside the arc angle of the static contact.
  • the first baffle and second baffle are symmetrically arranged to each other.
  • the first baffle is provided on one side of the housing on which the static contact is located, the first baffle is located inside the arc angle of the static contact, and the first baffle cuts off an arc and/or an airflow, and the second baffle provided on the other side of the housing cuts off an arc and/or an airflow.
  • At least one of the first baffle and the second baffle is a straight edge baffle, and the straight edge baffle crosses the arc angle of the static contact so as to cut off the space inside the arc angle of the static contact.
  • At least one of the first baffle and the second baffle is an arc-shaped baffle, and the arc-shaped baffle occupies the arc angle of the static contact so as to cut off the space inside the arc angle of the static contact.
  • the present invention can solve the problem that during a process of short-circuit breaking, high-temperature gas returns from a side of the arc angle of the static contact back to a place between a movable contact and the static contact, driving the arc to repeatedly move within an arc channel, resulting in a long breaking time and severe burning of the movable contact and the static contact.
  • the baffles can effectively cut off an airflow and the arc, so that the arc can effectively enter an extinguishing arc chamber for extinguishing.
  • the breaking time is significantly shortened, the breaking effect is better.
  • a first baffle is arranged in the arc angle area of the static contact, and the first baffle cuts off the space inside the arc angle area.
  • a second baffle with a symmetrical structure is arranged on the other side of the housing at a position corresponding to the arc angle area, so that both the airflow inside the arc angle area and outside the arc angle area can be cut off, and the arc backflow phenomenon in the arc angle area can be reduced.
  • the arc can effectively enter into the arc extinguishing chamber for arc extinguishing.
  • the circuit breaker is provided with baffles on both sides of a housing of the circuit-breaker, wherein the baffle on one side is located inside an arc angle of a static contact, and the baffle cuts off a space inside the arc angle of the static contact.
  • the baffle may have various shapes that can realize the function of cutting off the space inside the arc angle.
  • the baffle on the other side has a symmetrical structure.
  • the term "symmetrical structure" means that the other baffle on the other side is arranged in a symmetrical position, that is, a corresponding position on the other side of the housing and has a corresponding size.
  • FIG. 1 illustrates a structural diagram of a baffle of a circuit breaker according to an embodiment of the present invention.
  • the baffle 101 provided on the housing 103 is a straight edge baffle 111.
  • the straight edge baffle 111 crosses the arc angle 102 of the static contact so as to cut off the space inside the arc angle 102 of the static contact.
  • the straight edge baffle 111 longitudinally crosses the arc angle 102 and separates the space within the arc angle 102 into two parts which are separated from each other.
  • FIG. 2 illustrates a structural diagram of a baffle of a circuit breaker according to another embodiment of the present invention.
  • the baffle 101 provided on the housing 103 is an arc-shaped baffle 112.
  • the arc-shaped baffle 112 occupies the arc angle 102 of the static contact so as to cut off the space inside the arc angle 102 of the static contact.
  • the arc-shaped baffle 112 has a shape that matches the arc angle 102, and the arc-shaped baffle 112 occupies the space inside the arc angle 102.
  • baffles may be any shape which can realize the function of cutting off the space inside the arc angle.
  • the first baffle is provided on the side of the housing on which the static contact is located, and the first baffle is located inside the arc angle of the static contact.
  • the second baffle is provided on the other side of the housing.
  • the first baffle and the second baffle have a symmetrical structure. That is, assuming that there is a symmetrical "virtual" static contact on the other side of the housing, the second baffle is located exactly in the arc angle of the "virtual" static contact and cuts off the space inside the arc angle.
  • the first baffle and the second baffle both have the function of cutting off an arc and/or an airflow.
  • the present invention also provides a circuit breaker utilizing the baffle mentioned above.
  • Baffles are provided on both sides of a housing of the circuit-breaker.
  • the baffle on one side is located inside an arc angle of a static contact, and the baffle cuts off a space inside the arc angle of the static contact.
  • the baffles on both sides have a symmetrical structure.
  • the first baffle is provided on the side of the housing on which the static contact is located, and the first baffle is located inside the arc angle of the static contact.
  • the second baffle is provided on the other side of the housing.
  • the first baffle and the second baffle both have the function of cutting off an arc and/or an airflow.
  • Each of the baffles may be a straight edge baffle as shown in FIG. 1 , or an arc-shaped baffle as shown in FIG. 2 .
  • the baffles also may have other shapes that can realize the function of cutting off the space inside the arc angle.
  • FIG. 3a and FIG. 3b illustrate a structural diagram of a circuit breaker according to an embodiment of the present invention.
  • the first baffle and the second baffle provided on different sides of the housing of the circuit breaker have a same shape, and are located at symmetrical positions. Both of the first baffle and the second baffle are straight edge baffles.
  • the first baffle 301 provided on the side of the housing on which the static contact is located is a straight edge baffle
  • the first baffle 301 cuts off an arc and/or an airflow.
  • Arrows in FIG. 3a show paths of the arc and/or the airflow.
  • FIG. 3a show paths of the arc and/or the airflow.
  • the second baffle 302 provided on the other side of the housing is also a straight edge baffle.
  • the second baffle 302 is arranged in a symmetrical position with the first baffle 301.
  • the second baffle 302 cuts off an arc and/or an airflow. Arrows in FIG. 3b show paths of the arc and/or the airflow.
  • FIG. 4a and FIG. 4b illustrate a structural diagram of a circuit breaker according to another embodiment of the present invention.
  • the first baffle and the second baffle provided on different sides of the housing of the circuit breaker have a same shape, and are located at symmetrical positions.
  • the first baffle and the second baffle are both arc-shaped baffles.
  • the first baffle 401 provided on the side of the housing on which the static contact is located is an arc-shaped baffle
  • the first baffle 301 cuts off an arc and/or an airflow.
  • Arrows in FIG. 4a show paths of the arc and/or the airflow.
  • FIG. 4a show paths of the arc and/or the airflow.
  • the second baffle 402 provided on the other side of the housing is also an arc-shaped baffle.
  • the second baffle 402 is arranged in a symmetrical position with the first baffle 401.
  • the second baffle 402 cuts off an arc and/or an airflow. Arrows in FIG. 4b show paths of the arc and/or the airflow.
  • FIG. 5a and FIG. 5b illustrate a structural diagram of a circuit breaker according to a further embodiment of the present invention.
  • the first baffle and the second baffle provided on different sides of the housing of the circuit breaker have different shapes, but are located at symmetrical positions and have corresponding sizes.
  • the first baffle 501 provided on the side of the housing on which the static contact is located is a straight edge baffle, the straight edge first baffle 501 cuts off an arc and/or an airflow.
  • Arrows in FIG. 5a show paths of the arc and/or the airflow.
  • FIG. 5a show paths of the arc and/or the airflow.
  • the second baffle 502 provided on the other side of the housing is an arc-shaped baffle.
  • the arc-shaped second baffle 502 cuts off an arc and/or an airflow.
  • Arrows in FIG. 5b show paths of the arc and/or the airflow.
  • FIG. 5a and FIG. 5b better explain the meaning of the term "symmetrical structure" of the present invention.
  • the symmetrical structure means that the second baffle on the other side is arranged in a symmetrical position with the first baffle. That is, the second baffle is arranged in a corresponding position on the other side of the housing and has a corresponding size.
  • the second baffle is located exactly in the arc angle of the "virtual" static contact and cuts off the space inside the arc angle.
  • the term “symmetrical” here refers to the corresponding mounting positions and sizes of the baffles, while the shapes of the baffle are not required to be exactly the same.
  • the baffle of the present invention can solve the problem that during a process of short-circuit breaking, high-temperature gas returns from a side of the arc angle of the static contact back to a place between a movable contact and the static contact, driving the arc to repeatedly move within an arc channel, resulting in a long breaking time and severe burning of the movable contact and the static contact.
  • the baffle can effectively cut off an airflow and the arc, so that the arc can effectively enter an extinguishing arc chamber for extinguishing.
  • the breaking time is significantly shortened, the breaking effect is better.

Landscapes

  • Arc-Extinguishing Devices That Are Switches (AREA)
  • Breakers (AREA)

Claims (4)

  1. Schutzschalter mit:
    einem Gehäuse (103),
    gekennzeichnet durch ein erstes Leitblech (111; 301; 401; 501) und ein zweites Leitblech (112; 302; 402; 502), welche auf beiden Seiten des Gehäuses (103) vorgesehen sind,
    wobei das erste Leitblech (111; 301; 401; 501) auf einer Seite des Gehäuses (103) innerhalb eines Bogenwinkels (102) eines statischen Kontakts angeordnet ist, und das erste Leitblech (111; 301; 401; 501) einen Raum im Inneren des Bogenwinkels (102) des statischen Kontakts sperrt, wobei das erste und das zweite Leitblech (111, 112; 301, 302; 401, 402; 501, 502) in Bezug zueinander symmetrisch angeordnet sind.
  2. Schutzschalter nach Anspruch 1, bei welchem das erste Leitblech (111; 301; 401; 501) auf einer Seite des Gehäuses (103) vorgesehen ist, auf welcher der statische Kontakt angeordnet ist, wobei das erste Leitblech (111; 301; 401; 501) innerhalb des Bogenwinkels (102) des statischen Kontakts angeordnet ist, und wobei das erste Leitblech (111; 301; 401; 501) einen Lichtbogen und/oder einen Luftstrom unterbricht, und wobei das auf der anderen Seite des Gehäuses (103) angeordnete zweite Leitblech (112; 302; 402; 502) einen Lichtbogen und/oder einen Luftstrom unterbricht.
  3. Schutzschalter nach Anspruch 2, bei welchem das erste Leitblech (111; 301; 401; 501) und/oder das zweite Leitblech (112; 302; 402; 502) ein Leitblech mit gerader Kante ist, und das Leitblech mit gerader Kante den Bogenwinkel (102) des statischen Kontakts kreuzt, um den Raum innerhalb des Bogenwinkels (102) des statischen Kontakts zu sperren.
  4. Schutzschalter nach Anspruch 2, bei welchem das erste Leitblech (111; 301; 401; 501) und/oder das zweite Leitblech (112; 302; 402; 502) ein bogenförmiges Leitblech ist und das bogenförmige Leitblech den Bogenwinkel (102) des statischen Kontakts einnimmt, um den Raum innerhalb des Bogenwinkels (102) des statischen Kontakts zu sperren.
EP16858885.3A 2015-10-30 2016-09-29 Leistungsschalter und blende davon Active EP3370246B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201510728363.1A CN105185671B (zh) 2015-10-30 2015-10-30 断路器及其挡板
PCT/CN2016/100722 WO2017071449A1 (zh) 2015-10-30 2016-09-29 断路器及其挡板

Publications (3)

Publication Number Publication Date
EP3370246A1 EP3370246A1 (de) 2018-09-05
EP3370246A4 EP3370246A4 (de) 2019-06-19
EP3370246B1 true EP3370246B1 (de) 2020-08-26

Family

ID=54907681

Family Applications (1)

Application Number Title Priority Date Filing Date
EP16858885.3A Active EP3370246B1 (de) 2015-10-30 2016-09-29 Leistungsschalter und blende davon

Country Status (6)

Country Link
EP (1) EP3370246B1 (de)
KR (1) KR102705657B1 (de)
CN (1) CN105185671B (de)
BR (1) BR112018008400B1 (de)
RU (1) RU2700790C1 (de)
WO (1) WO2017071449A1 (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105185671B (zh) * 2015-10-30 2019-06-25 上海电科电器科技有限公司 断路器及其挡板

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ATE115767T1 (de) * 1989-03-13 1994-12-15 Licentia Gmbh Selbstschalter, insbesondere leitungsschutzschalter.
FR2828329B1 (fr) * 2001-07-31 2003-12-12 Legrand Sa Dispositif pour l'extinction d'un arc electrique
CN1758396A (zh) * 2004-12-27 2006-04-12 常熟开关制造有限公司(原常熟开关厂） 自动转换开关的灭弧装置
JP4529769B2 (ja) * 2005-04-05 2010-08-25 三菱電機株式会社 回路遮断器
CN2924772Y (zh) * 2005-12-05 2007-07-18 北京Abb低压电器有限公司 用于微型断路器的静触座、灭弧系统及微型断路器
CN200990306Y (zh) * 2006-11-30 2007-12-12 Tcl低压电器(无锡)有限公司 利于灭弧的吹弧结构
DE602007006940D1 (de) * 2007-07-26 2010-07-15 Bticino Spa Differentialschutzblock für einen elektrischen Schalter
RU2391737C1 (ru) * 2008-12-15 2010-06-10 Общество с ограниченной ответственностью "Технос" Выключатель автоматический быстродействующий
JP2011014350A (ja) * 2009-07-01 2011-01-20 Mitsubishi Electric Corp 回路遮断器
CN201663133U (zh) * 2010-04-08 2010-12-01 温州科宇电器有限公司 小型断路器灭弧装置
CN201780948U (zh) * 2010-09-13 2011-03-30 赵建平 一种低压电器断路器引弧机构
DE102011118968B3 (de) * 2011-11-19 2013-01-31 Abb Ag Installationsschaltgerät mit Vorkammerraum und Leitrippen
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WO2014155442A1 (ja) * 2013-03-27 2014-10-02 パナソニック株式会社 回路遮断器
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CN205231002U (zh) * 2015-10-30 2016-05-11 上海电科电器科技有限公司 断路器及其挡板
CN105185671B (zh) * 2015-10-30 2019-06-25 上海电科电器科技有限公司 断路器及其挡板
RU164778U1 (ru) * 2016-03-01 2016-09-20 Индивидуальный предприниматель Кашичкина Елена Евгеньевна Контактная система автоматического выключателя

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Also Published As

Publication number Publication date
CN105185671B (zh) 2019-06-25
CN105185671A (zh) 2015-12-23
EP3370246A1 (de) 2018-09-05
BR112018008400A2 (pt) 2018-10-23
RU2700790C1 (ru) 2019-09-23
KR20180099634A (ko) 2018-09-05
KR102705657B1 (ko) 2024-09-11
BR112018008400B1 (pt) 2023-01-17
EP3370246A4 (de) 2019-06-19
WO2017071449A1 (zh) 2017-05-04

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