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EP3373320B1 - Disjoncteur et sa structure d'échappement - Google Patents

Disjoncteur et sa structure d'échappement Download PDF

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Publication number
EP3373320B1
EP3373320B1 EP16861408.9A EP16861408A EP3373320B1 EP 3373320 B1 EP3373320 B1 EP 3373320B1 EP 16861408 A EP16861408 A EP 16861408A EP 3373320 B1 EP3373320 B1 EP 3373320B1
Authority
EP
European Patent Office
Prior art keywords
exhaust
circuit breaker
exhaust port
wiring device
arc
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
EP16861408.9A
Other languages
German (de)
English (en)
Other versions
EP3373320A4 (fr
EP3373320A1 (fr
Inventor
Shenhu ZHANG
Changqing ZHOU
Weijun GE
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 EP3373320A1 publication Critical patent/EP3373320A1/fr
Publication of EP3373320A4 publication Critical patent/EP3373320A4/fr
Application granted granted Critical
Publication of EP3373320B1 publication Critical patent/EP3373320B1/fr
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
    • H01H9/34—Stationary parts for restricting or subdividing the arc, e.g. barrier plate
    • H01H9/342—Venting arrangements for arc chutes

Definitions

  • the present invention relates to the field of low voltage electrical apparatus, and more particularly, to an exhaust structure for a circuit breaker as well as to a circuit breaker comprising such an exhaust structure.
  • circuit breakers With the development of technology, the size of circuit breakers is getting smaller and smaller, but the technical performance indexes are getting higher and higher. Circuit breakers will generate high temperature expansion gases during a short-circuit breaking process. As the size of the circuit breaker becomes smaller, if the high-temperature expansion gas is not able to be eliminated in time, an air flow will be formed, which will prevent an arc from effectively entering into an arc extinguishing chamber. Staying of the arc will form an arc backflow, which will cause the arc to stagnate in an arc channel, and result in a long breaking time, severe burning of an arcing plate and the movable/static contacts.
  • CN201796768U discloses a wiring switch device with an arc extinguishing device, in particular to an electrical wiring switch device provided with a casing, a terminal connecting chamber and the arc extinguishing device.
  • the wiring switch device comprises an arc extinguishing chamber.
  • An arc extinguishing plate stack with arc extinguishing plates stacked in parallel mutually is arranged in the arc extinguishing chamber, wherein the arc extinguishing plates are kept spaced with each other in a stacking direction.
  • exhaust flows can exit from the arc extinguishing chamber at the positions of exhaust lateral surfaces.
  • a first flow guide wall element is arranged inside the wiring switch device casing, and at least partial exhaust flow is guided into the terminal connecting chamber by the aid of the first flow guide wall element.
  • CN102243945A discloses an installation switching device, which comprises a housing.
  • the housing comprises an upper wide side, a lower wide side, a front side, a fixed side, a narrow side and an arc extinguishing device.
  • An intermediate piece is arranged inside the housing in a way to make the arc extinguishing device accommodated in a partial space between the upper wide side and the intermediate piece.
  • a first exhaust channel is formed between an exhaust wall extending in a way to be parallel to the wide side and the upper wide side.
  • the first exhaust channel guides exhaust flows from the arc extinguishing device end part directing towards the narrow side to a first exhaust gas hole in a narrow side wall of the housing.
  • An end insulating part is arranged between a narrow side part located on the exhaust gas wall of the intermediate piece and the lower wide side.
  • An intermediate hole is provided on the exhaust gas wall of the intermediate piece. The intermediate hole is aligned with an insulating part hole inside the end insulating part so as to form a second exhaust gas channel.
  • the second exhaust gas channel guides a first branch flow from a part between the end spatial partition and the lower wide side to a second exhaust gas hole in the narrow side wall.
  • CN201796768U and CN102243945A guide the exhaust of air flow through the arrangement of an exhaust channel, so as to improve the problem of air flow stagnation caused by turbulence of the air flow, thereby increasing the exhaust capacity.
  • the space within the circuit breaker is getting smaller and smaller, even if the air flow can flow out in order along the exhaust channel, air flow stagnation will still occur due to the large volume of gas and the small space in the circuit breaker, which will affect the result of arc extinguishing.
  • CN203013659U discloses a circuit breaker provided with an arc running channel.
  • a pedestal and a cover are provided with positioning long protruding diameters, which are symmetrically arranged.
  • the other side of an arc extinguishing chamber, which is far away from the arc running channel, abuts against the positioning long protruding diameters of the pedestal and the cover.
  • Arc dividing protruding diameters are symmetrically disposed on lower sides of the positioning long protruding diameters of the pedestal and the cover.
  • the arc dividing protruding diameters can be used to form a curved arc running channel, and side walls of the pedestal and the cover behind the arc dividing diameters are provided with arc spraying ports.
  • CN203013659U assists extinguishing by cutting off the arc, but CN203013659U still does not solve the problem that the air flow is not able to be exhausted in time.
  • US 4 620 076 A describes a circuit breaker apparatus, according to the preamble of claim 1, having a molded case forming a plurality of intercommunicating compartments with a circuit breaker structure within a compartment, arc-quenching means in an adjacent compartment, a line terminal in a next adjacent compartment and electrically insulating shield means between the line terminal and the arc-quenching compartment.
  • An arc chute includes a wall of electrically insulating fiber material. The wall is perforated to enable the escape of otherwise explosive gas (air) emitting from the arc chute when contacts of the circuit breaker are open.
  • the invention proposes an exhaust structure for a circuit breaker, which solves the exhaust problem of a miniature circuit breaker by expanding the exhaust space and increasing the exhaust volume.
  • an exhaust structure for a circuit breaker is provided as defined in claim 1.
  • the exhaust structure comprises an exhaust port aligned with a tail of an arc extinguish chamber.
  • An exhaust space of the exhaust port is configured to overlap with a wiring device of the circuit breaker. When the wiring device is not connected, The exhaust space is arranged to house the wiring device when the wiring device is not connected. The exhaust space is arranged to be vacated when the wiring device is connected.
  • the three exhaust ports are provided.
  • the three exhaust ports are formed on a housing of the circuit breaker, and are respectively aligned with the top, middle and bottom of the tail of the arc extinguishing chamber.
  • the three exhaust ports are arranged on the housing at equal intervals.
  • An exhaust space of the exhaust port aligned with the middle of the tail of the arc extinguishing chamber is arranged to overlap with the wiring device of the circuit breaker.
  • a base and a cover of the housing of the circuit breaker are provided with corresponding grooves, respectively.
  • the grooves form the three exhaust ports, and at least one exhaust port is configured to be split by components of the circuit breaker.
  • the exhaust structure further comprises at least one block protrusion.
  • the block protrusion extends from the tail of the arc extinguish chamber to a position of at least one exhaust port in lateral direction, and extends from one exhaust port to another adjacent exhaust port in longitudinal direction.
  • the block protrusion is formed on the housing of the circuit breaker. One end of the block protrusion is in contact with the tail of the arc extinguishing chamber and supports the arc extinguishing chamber.
  • a circuit breaker is provided. At least one exhaust port is formed on a housing of the circuit breaker, the exhaust port is aligned with a tail of an arc extinguish chamber. An exhaust space of the exhaust port is overlapped with a wiring device of the circuit breaker. When the wiring device is not connected, the wiring device occupies the exhaust space. When the wiring device is connected, the exhaust space is vacated.
  • Three exhaust ports are formed on the housing of the circuit breaker.
  • the three exhaust ports are respectively aligned with the top, middle and bottom of the tail of the arc extinguishing chamber.
  • the three exhaust ports are arranged with equal intervals.
  • An exhaust space of the exhaust port aligned with the middle of the tail of the arc extinguishing chamber overlaps with the wiring device of the circuit breaker.
  • the housing of the circuit breaker comprises a base and a cover.
  • the base and the cover are provided with corresponding grooves respectively.
  • the grooves form the three exhaust ports, and at least one exhaust port is split by components of the circuit breaker.
  • At least one block protrusion is formed on the housing of the circuit breaker.
  • the block protrusion extends from the tail of the arc extinguish chamber to a position of at least one exhaust port in lateral direction, and extends from one exhaust port to another adjacent exhaust port in longitudinal direction.
  • one end of the block protrusion is in contact with the tail of the arc extinguishing chamber and supports the arc extinguishing chamber.
  • the exhaust structure of circuit breaker of the present invention utilizes an unoccupied space of the wiring device, increases the quantity of exhaust ports, expands the exhaust space, thereby significantly improving the exhaust capability.
  • the exhaust structure is also provided with a block protrusion for cutting off an arc.
  • the block protrusion also serves as a support for the arc extinguish chamber, avoiding reduction of the arc extinguish capability due to a shifting of the arc extinguish chamber caused by an impact.
  • the present invention discloses an exhaust structure of circuit breaker.
  • the exhaust structure comprises an exhaust port, the exhaust port is aligned with a tail of an arc extinguish chamber.
  • An exhaust space of the exhaust port is overlapped with a wiring device of the circuit breaker. When the wiring device is not connected, the wiring device occupies the exhaust space. When the wiring device is connected, the exhaust space is vacated.
  • the exhaust structure comprises at least three exhaust ports.
  • the at least three exhaust ports are aligned with the tail of the arc extinguish chamber, the at least three exhaust ports are arranged with equal intervals.
  • the exhaust structure comprises three exhaust ports, the three exhaust ports are respectively aligned with the top, middle and bottom of the tail of the arc extinguishing chamber.
  • An exhaust space of the exhaust port aligned with the middle of the tail of the arc extinguishing chamber overlaps with the wiring device of the circuit breaker.
  • the exhaust structure further comprises at least one block protrusion.
  • the block protrusion extends from the tail of the arc extinguish chamber to a position of at least one exhaust port in lateral direction, and extends from one exhaust port to another adjacent exhaust port in longitudinal direction.
  • FIG. 1 and FIG. 2 illustrate a plan view and a perspective view of an exhaust structure of a circuit breaker according to an embodiment of the present invention respectively.
  • the exhaust structure comprises three exhaust ports: a first exhaust port 101, a second exhaust port 102 and a third exhaust port 103, and a block protrusion 104.
  • the three exhaust ports and the block protrusion are all formed on a housing of the circuit breaker.
  • the housing of the circuit breaker is formed by combining a base 105 and a cover 108. According to FIG.
  • the base 105 is provided with a first base groove 501, a second base groove 502, a third base groove 503 and a base protrusion 504.
  • the base 105 is further provided with a base contact plate 507.
  • the cover 108 is provided with a first cover groove 801, a second cover groove 802, a third cover groove 803 and a cover protrusion 804.
  • the cover 108 is further provided with a cover contact plate 807.
  • the first base groove 501, the second base groove 502, the third base groove 503, the base protrusion 504 and the base contact plate 507 are arranged in "one-to-one" correspondence with the first cover groove 801, the second cover groove 802, the third cover groove 803, the cover protrusion 804 and the cover contact plate 807.
  • the base 105 and the cover 108 are mounted, the grooves and the protrusions on the base and the cover are aligned with each other to form the first exhaust port 101, the second exhaust port 102, the third exhaust port 103 and the block protrusion 104.
  • the second exhaust port 102 is directly formed by splicing the second base groove 502 and the second cover groove 802.
  • the third exhaust port 103 is directly formed by splicing the third base groove 503 and the third cover groove 803.
  • the block protrusion 104 is directly formed by splicing the base protrusion 502 and the over protrusion 804.
  • the second exhaust port 102, the third exhaust port 103 and the block protrusion 104 are all realized by single structure.
  • the first exhaust port 101 is separated into two portions.
  • the base contact plate 507 and the cover contact plate 807 form a complete contact plate when spliced.
  • An end surface 571 of the base contact plate 507 and the first base groove 501 form a first portion 101a of the first exhaust port.
  • an end surface 871 of the cover contact plate 807 and the first cover groove 801 form a second portion 101b of the first exhaust port.
  • the first portion 101a and the second portion 101b form the first exhaust port 101, as shown in FIG. 2 .
  • at least one exhaust port (the first exhaust port) of the three exhaust ports is split by components (the contact plate) of
  • the first exhaust port 101 is aligned with the top of the tail of the arc extinguishing chamber 106
  • the second exhaust port 102 is aligned with the middle of the tail of the arc extinguishing chamber 106
  • the third exhaust port 103 is aligned with the bottom of the tail of the arc extinguishing chamber 106.
  • the block protrusion 104 has a zigzag shape which is similar to the letter "Z”. A top end 141 of the block protrusion 104 is in contact with the tail of the arc extinguishing chamber 106.
  • the block protrusion 104 is in contact with the tail of the arc extinguishing chamber 106 so as to support the arc extinguishing chamber 106.
  • a powerful thrust will be instantaneously generated and act on the arc extinguishing chamber 106.
  • the block protrusion 104 may play a role of supporting and positioning, so as to avoid reduction of the arc extinguish capability due to a shifting of the arc extinguish chamber caused by an impact.
  • the position where the top end 141 of the block protrusion 104 is in contact with the arc extinguishing chamber 106 is approximately in the middle of the arc extinguishing chamber 106, or the same height as the second exhaust port 102.
  • the position of a bottom end of the block protrusion 104 is approximately at the bottom of the arc extinguishing chamber 106, or the same height as the third exhaust port 103.
  • the block protrusion 104 Viewed from a lateral direction, the block protrusion 104 extends from the arc extinguishing chamber 106 to a position beneath the second exhaust port 102, substantially covering a distance from the closest exhaust port (second exhaust port 102) to the arc extinguishing chamber 106.
  • the block protrusion 104 may effectively cut off the arc and air flow.
  • the illustrated block protrusion 104 has a zigzag shape which is similar to the letter "Z", it should be noted that the block protrusion 104 may be in other shapes.
  • the shape of the block protrusion 104 shall satisfy the following conditions: the block protrusion 104 extends from the tail of the arc extinguish chamber to a position of at least one exhaust port in lateral direction, and the block protrusion extends from one exhaust port to another adjacent exhaust port in longitudinal direction.
  • the distance between the first exhaust port 101, the second exhaust port 102, and the third exhaust port 103 is substantially equal, which is approximately half of the height of the arc extinguishing chamber 106.
  • the sizes of the openings of the first exhaust port 101, the second exhaust port 102, and the third exhaust port 103 are all between 1.8mm-3mm, and the first exhaust port 101, the second exhaust port 102, and the third row.
  • the size of the opening of the air port 103 is generally not set to be the same, but it may be set to be the same. Generally, only one opening range needs to be limited.
  • the first exhaust port 101, the second exhaust port 102, and the third exhaust port 103 formed on the base 105 and the cover 108 increase the number of exhaust passages and also increase the volume of the exhaust space.
  • FIG. 4 illustrates a working state of a wiring device of a circuit breaker with the exhaust structure.
  • two wiring devices of the circuit breaker are disclosed, including a first wiring device 401 on the left side and a second wiring device 402 on the right side.
  • the wiring device of the circuit breaker shown in FIG. 4 is for the purpose of illustrating the position of the second exhaust port 102, it is not intended to impose any limit on the wiring device itself.
  • An exhaust space 122 corresponding to the second exhaust port 102 is overlapped with the wiring device.
  • the wiring device When the wiring device is not connected, such as the first wiring device 401 on the left side in FIG. 4 , the wiring device will occupy the exhaust space 122.
  • the wiring device When the wiring device is connected, such as the second wiring device 402 on the right side in FIG. 4 , the wiring device is lifted upwards to vacate the exhaust space 122.
  • the wiring device When the circuit breaker is in use, the wiring device will inevitably be lifted upwards for connecting, leaving the exhaust space 122 free. Therefore, when the circuit breaker is in use, the second exhaust port 102 and the exhaust space 122 can be put into use, thereby increasing the exhaust space.
  • the exhaust structure proposed by the present invention mainly comprises an exhaust port, the exhaust port is aligned with a tail of an arc extinguish chamber.
  • An exhaust space of the exhaust port is overlapped with a wiring device of the circuit breaker. When the wiring device is not connected, the wiring device occupies the exhaust space. When the wiring device is connected, the exhaust space is vacated.
  • the present invention also provides a circuit breaker with the exhaust structure mentioned above.
  • At least one exhaust port is formed on a housing of the circuit breaker, the exhaust port is aligned with a tail of an arc extinguish chamber.
  • An exhaust space of the exhaust port is overlapped with a wiring device of the circuit breaker. When the wiring device is not connected, the wiring device occupies the exhaust space. When the wiring device is connected, the exhaust space is vacated.
  • At least three exhaust ports are formed on the housing of the circuit breaker.
  • the at least three exhaust ports are aligned with the tail of the arc extinguish chamber, and the at least three exhaust ports are arranged with equal intervals.
  • At least one block protrusion is formed on the housing of the circuit breaker. The block protrusion extends from the tail of the arc extinguish chamber to a position of at least one exhaust port in lateral direction, and extends from one exhaust port to another adjacent exhaust port in longitudinal direction. It should be noted that those skilled in the art may configure the number and positions of the exhaust ports, provide or cancel the block protrusion according to actual requirements.
  • three exhaust ports are formed on the housing of the circuit breaker.
  • the three exhaust ports are respectively aligned with the top, middle and bottom of the tail of the arc extinguishing chamber.
  • An exhaust space of the exhaust port aligned with the middle of the tail of the arc extinguishing chamber overlaps with the wiring device of the circuit breaker.
  • the housing of the circuit breaker comprises a base and a cover. The base and the cover are provided with corresponding grooves respectively. When the base and the cover are mounted, the grooves form the three exhaust ports. At least one exhaust port is split by components of the circuit breaker.
  • the first exhaust port is separated into two portions by the contact plate.
  • One end of the block protrusion is in contact with the tail of the arc extinguishing chamber and supports the arc extinguishing chamber.
  • the exhaust structure of circuit breaker of the present invention utilizes an unoccupied space of the wiring device, increases the quantity of exhaust ports, expands the exhaust space, thereby significantly improving the exhaust capability.
  • the exhaust structure is also provided with a block protrusion for cutting off an arc.
  • the block protrusion also serves as a support for the arc extinguish chamber, avoiding reduction of the arc extinguish capability due to a shifting of the arc extinguish chamber caused by an impact.

Landscapes

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

Claims (5)

  1. Structure d'échappement pour un disj oncteur comprenant un dispositif de câblage, la structure d'échappement comprenant un boîtier incluant une structure d'échappement caractérisée en ce que la structure d'échappement comprend trois orifices d'échappement (101, 102, 103) disposés à intervalles égaux sur le boîtier, un premier orifice d'échappement (101), un deuxième orifice d'échappement (102) et un troisième orifice d'échappement (103) respectivement alignés avec le haut, le milieu et le bas d'une extrémité d'une chambre d'extinction d'arc (106), dans laquelle :
    l'orifice d'échappement (102) aligné avec le milieu de l'extrémité de la chambre d'extinction d'arc (106) comprend un espace d'échappement disposé de manière à chevaucher le dispositif de câblage du disjoncteur, et
    l'espace d'échappement est disposé de manière à loger le dispositif de câblage lorsque celui-ci n'est pas connecté, et l'espace d'échappement est disposé de manière à être libéré lorsque le dispositif de câblage est connecté.
  2. Structure d'échappement pour un disjoncteur selon la revendication 1, dans laquelle le boîtier comprend une base (105) et un couvercle (108) munis de rainures correspondantes (501, 502, 503, 801, 802, 803) respectivement, lorsque la base (105) et le couvercle (108) sont montés, les rainures (501, 502, 503, 801, 802, 803) forment les trois orifices d'échappement (101, 102, 103), et au moins un orifice d'échappement (102, 103) est configuré pour être séparé par des composants du disjoncteur.
  3. Structure d'échappement pour un disjoncteur selon la revendication 1, comprenant en outre au moins une saillie de bloc (104) s'étendant de l'extrémité de la chambre d'extinction d'arc (106) à une position d'au moins un orifice d'échappement (102) des trois orifices d'échappement (101, 102, 103) dans la direction latérale, et s'étendant d'un orifice d'échappement à un autre orifice d'échappement adjacent (103) des trois orifices d'échappement (101, 102, 103) dans la direction longitudinale.
  4. Structure d'échappement pour un disjoncteur selon la revendication 3, dans laquelle la saillie de bloc est formée sur le boîtier du disjoncteur, et une extrémité de la saillie de bloc (104) est en contact avec l'extrémité de la chambre d'extinction d'arc (106) et supporte la chambre d'extinction d'arc.
  5. Disjoncteur comprenant un dispositif de câblage et une structure d'échappement selon l'une quelconque des revendications 1 à 4.
EP16861408.9A 2015-11-02 2016-09-29 Disjoncteur et sa structure d'échappement Active EP3373320B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201510733926.6A CN105244242B (zh) 2015-11-02 2015-11-02 断路器及其排气结构
PCT/CN2016/100720 WO2017076140A1 (fr) 2015-11-02 2016-09-29 Disjoncteur et sa structure d'échappement

Publications (3)

Publication Number Publication Date
EP3373320A1 EP3373320A1 (fr) 2018-09-12
EP3373320A4 EP3373320A4 (fr) 2019-06-26
EP3373320B1 true EP3373320B1 (fr) 2021-01-27

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP16861408.9A Active EP3373320B1 (fr) 2015-11-02 2016-09-29 Disjoncteur et sa structure d'échappement

Country Status (6)

Country Link
EP (1) EP3373320B1 (fr)
KR (1) KR102641636B1 (fr)
CN (1) CN105244242B (fr)
BR (1) BR112018008355B1 (fr)
RU (1) RU2702341C1 (fr)
WO (1) WO2017076140A1 (fr)

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CN105244242B (zh) * 2015-11-02 2017-09-15 上海电科电器科技有限公司 断路器及其排气结构
CN108648938B (zh) * 2018-06-15 2023-12-05 上海电器科学研究所（集团）有限公司 一种具有优良磁吹效果的导电回路系统
CN110071021A (zh) * 2019-05-14 2019-07-30 浙江创奇电气有限公司 一种断路器用排气灭弧机构及小型断路器
CN114156130B (zh) * 2020-09-07 2024-06-18 上海良信电器股份有限公司 用于冷却的灭弧装置及断路器
CN114156144B (zh) * 2020-09-07 2024-11-22 上海良信电器股份有限公司 一种断路器

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Also Published As

Publication number Publication date
CN105244242B (zh) 2017-09-15
RU2702341C1 (ru) 2019-10-08
BR112018008355B1 (pt) 2023-01-24
BR112018008355A2 (pt) 2018-10-30
WO2017076140A1 (fr) 2017-05-11
KR102641636B1 (ko) 2024-02-28
KR20180105638A (ko) 2018-09-28
EP3373320A4 (fr) 2019-06-26
CN105244242A (zh) 2016-01-13
EP3373320A1 (fr) 2018-09-12

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