EP4220676A1 - Schutzschalter - Google Patents

Schutzschalter Download PDF

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Publication number
EP4220676A1
EP4220676A1 EP23154029.5A EP23154029A EP4220676A1 EP 4220676 A1 EP4220676 A1 EP 4220676A1 EP 23154029 A EP23154029 A EP 23154029A EP 4220676 A1 EP4220676 A1 EP 4220676A1
Authority
EP
European Patent Office
Prior art keywords
circuit breaker
component
deionizing
housing
gas outlet
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.)
Pending
Application number
EP23154029.5A
Other languages
English (en)
French (fr)
Inventor
Peixin SHI
Lin Zhang
Chuang CHEN
Jianhua Chen
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.)
Eaton Electrical Ltd
Original Assignee
Eaton Electrical 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 Eaton Electrical Ltd filed Critical Eaton Electrical Ltd
Publication of EP4220676A1 publication Critical patent/EP4220676A1/de
Pending 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

Definitions

  • This disclosure relates to relates to a low-voltage electrical appliance, and in particular to a circuit breaker.
  • the circuit breaker is applied to the field of power distribution, and as shown in FIG. 1 , it mainly includes a housing 1, as well as a moving contact terminal, a fixed contact terminal 7 and an arc extinguishing chamber 2 that are installed in an interior space of the housing.
  • the circuit breaker realizes the on and off of current through connection and disconnection between a moving contact of the moving contact terminal and a fixed contact of the fixed contact terminal.
  • a line is overloaded or short-circuited, under the action of a protection unit, the moving contact terminal will separate from the fixed contact terminal, thus generating an arc.
  • gas inside the circuit breaker will be ionized under the effect of a high temperature and a strong electric field to produce a large amount of ionized gas.
  • this disclosure provides a circuit breaker in which a deionizing component is arranged between the arc extinguishing chamber and the gas outlet passage in the interior space of the housing, thereby preventing the ionized gas and the metal vapor flying out of the circuit breaker via the gas outlet passages to achieve zero flashover function. Moreover, such a circuit breaker does not need to increase the original occupation space, and greatly reduces the manufacturing cost.
  • a circuit breaker including a housing and an arc extinguishing chamber arranged in an interior space of the housing, wherein a gas outlet passage is formed in a first sidewall of the housing, the gas outlet passage is designed to communicate the interior space of the housing with a surrounding environment of the circuit breaker, at least one deionizing component is arranged between the arc extinguishing chamber and the gas outlet passage, and the deionizing component is configured to allow conductive gases to pass therethrough and designed to cool the conductive gases therethrough.
  • the technical solution of this disclosure by means of arranging at least one deionizing component in the interior space of the housing, it is not required to install a terminal cover outside the circuit breaker, not like the prior art in which a terminal cover is installed outside the circuit breaker, resulting in increase of the original occupation space. Further, the technical solution of this disclosure only needs to arrange the deionizing component within a reduced space range and thus requires less material than the prior art, which significantly reduces the manufacturing cost.
  • the deionizing component is made of one or both of a metal braided mesh or a foam metal.
  • the metal woven mesh is made of a steel material
  • the foam metal is made of a steel material, a ceramic material or a nickel-based alloy.
  • the foam metal is made of a steel material or a nickel-based alloy
  • an outer surface of the foam metal is also coated with a ceramic compound coating.
  • the at least one deionizing component includes a first deionizing component extending longitudinally across the entire arc extinguishing chamber.
  • the at least one at least one deionizing component further includes a second deionizing component arranged at a first end of the gas outlet passage close to the interior space of the housing.
  • an insulation sheet is further arranged at the first end of the gas outlet passage, the insulation sheet is provided with at least one gas inlet hole which is in gas communication with the gas outlet passage, wherein the insulation sheet is arranged between the first end and the second deionizing component.
  • the circuit breaker further includes a support frame for fixedly installing the first deionizing component, and the first deionizing component is received in the interior space of the housing in a relatively non-movable manner by means of the support frame.
  • the housing includes a base and a cover located above the base, and the gas outlet passage is formed on a vertically extending section of the cover.
  • the circuit breaker further includes a fixed contact terminal located below the arc extinguishing chamber in the interior space of the housing, the cover has a second sidewall extending above the arc extinguishing chamber, and the support frame is positioned relatively non-movably with respect to the housing by means of a first limiting component fixedly installed on the fixed contact terminal and a second limiting component fixedly installed on the second sidewall.
  • the second deionizing component is relatively non-movably clamped between a lower surface of the second sidewall and an upper end surface of the base facing the cover.
  • conductive gases the ionized gas and the metal vapor, as well as other conductive gases that may be generated in the arc extinguishing chamber under the action of high-temperature arc are collectively referred to herein as conductive gases.
  • FIG. 2 shows a schematic structural diagram of the circuit breaker according to this disclosure.
  • the circuit breaker includes a housing 1 and an arc extinguishing chamber 2 arranged in an interior space of the housing 1, wherein the arc extinguishing chamber 2 is relatively non-movably arranged in the interior space of the housing 1.
  • a fixed contact terminal 7 and a moving contact terminal are also fixedly arranged in the housing 1.
  • the housing 1 has a first sidewall 13 and the first sidewall 13 is provided with a gas outlet passage so that conductive gases generated inside the housing 1 can flow from the interior space of the housing 1 to the surrounding environment of the circuit breaker via the gas outlet passage.
  • the housing 1 includes a base 11 and a cover 12, wherein the cover body 12 is located above the base 11.
  • the cover 12 may include a second sidewall 14 extending above the arc extinguishing chamber 2 and a vertically extending section.
  • the gas outlet passage is formed on the vertically extending section of the cover 12.
  • At least one deionizing component is arranged between the arc extinguishing chamber 2 and the gas outlet passage, and the the gas outlet passage can allow the conductive gases to pass therethrough and also to cool the conductive gases therethrough.
  • the deionizing component can be configured as a metal braided mesh.
  • FIG. 4 shows the configuration when the deionizing component can be configured as a metal braided mesh.
  • the conductive gases can pass through the metal braided mesh via mesh holes.
  • the deionizing component may also be made of a foam metal with a large number of air holes therein, the air holes can be connected to form a through passage through which the conductive gases can pass through the metal foam.
  • the deionizing component can also be formed by stacking a plurality of metal plates, wherein each metal plate needs to have 10 through holes, and the through holes in each metal plate need to be able to be connected into at least one through passage when the metal plates are stacked together to allow the conductive gases to pass through.
  • the metal braided mesh or metal plate described above is preferably made of steel, copper, or other materials, especially preferably a steel material.
  • the foam metal can be made of a steel material, a ceramic material or a nickel-based alloy.
  • the foam material is made of a steel material or a nickel-based alloy
  • an outer surface of the foam metal is also coated with a ceramic compound coating.
  • the ceramic compound coating has a physical property of high-temperature resistance, which can improve the high-temperature resistance of the metal foam
  • the deionizing component having the above properties can cool the conductive gases passing therethrough, so that the ionized gas is deionized or the metal vapor becomes large metal particles and stays inside the product.
  • a first deionizing component 3 is arranged between the arc extinguishing chamber 2 and the gas outlet passage.
  • the first deionizing component 3 extends along its longitudinal direction and extends through the entire arc extinguishing chamber 2. As a result, the conductive gases generated from the arc extinguishing chamber 2 must pass through the first deionizing component 3 before entering the gas outlet passage.
  • a second deionizing component 4 is arranged at a first end of the gas outlet passage close to the interior space of the housing 1. Therefore, by means of additionally adding a second deionizing component 4 at the first end of the gas outlet passage close to the interior space of the housing 1, it is further ensured that all the conductive gases that escapes to the external environment through the gas outlet passage under various arc conditions are deionized to achieve "zero flashover".
  • the insulation sheet 6 is provided with a plurality of gas inlet holes which can be in gas communication with the gas outlet passage without blocking gas from going in and out of the gas outlet passage.
  • the insulation sheet 6 is able to prevent foreign objects in the surrounding environment from entering the interior space of the housing via the gas outlet passage.
  • the insulation sheet 6 can be arranged between the first end of the gas outlet passage and the second deionizing component 4.
  • first deionizing component 3 and the second deionizing component 4 do not necessary employ the same material and configuration.
  • the first deionizing component 3 can employ a copper-made metal braided mesh and the second deionizing component 4 can employ a steel-made foam metal.
  • a plurality of deionizing components 3 and a plurality of second deionizing components 4 may be provided according to factors such as desired effects, selected materials, material thicknesses, and the like.
  • a support frame 5 is also provided.
  • the first deionizing component 3 may be fixedly installed on the support frame 5, for example, embedded within the support frame 5, so that the first deionizing component is received in the interior space of the housing 1 in a non-movable manner by means of the support frame 5.
  • the support frame 5 may be fixedly connected to the housing 1 and/or the fixed contact terminal 7 located below the arc extinguishing chamber 2 by means of a fastening tool, for example a screw or a clamp.
  • the support frame 5 may also be fixed directly to an arc extinguishing chamber side plate 21 of the arc extinguishing chamber 2 shown in FIG. 7 .
  • the first limiting component 8 and the second limiting component 9 are provided, respectively, wherein the first limiting component 8 is fixedly installed on the fixed contact terminal 7, the second limiting component 9 is fixedly installed on the second sidewall 14 of the housing 1, and lower and upper borders of the support frame 5 are limited from relative movement relative to the housing 1 through shape fit with the first limiting component 8 and the second limiting component 9 respectively. As shown, for example, in FIG.
  • the first limiting component 8 limits the leftward movement of the lower border
  • the second limiting component 9 limits the rightward movement of the upper border
  • the support frame 5 is also dimensionally designed such that the upper end surface of the upper border and the lower end surface of the lower border abut against the second limiting component 9 and the first limiting component 8 respectively so as to be limited from moving up and down.
  • the second deionizing component 4 may also be connected to the housing 1 by means of other tools. However, due to the limitation of space, it is preferred that the second deionizing component 4 is clamped between a lower surface of the second sidewall 14 and an upper end surface of the base 11 facing the cover 12.
  • the deionizing components are arranged in the interior space of the housing, there is no need to increase the original occupation space. Less material is required, thus greatly reducing the manufacturing cost.

Landscapes

  • Arc-Extinguishing Devices That Are Switches (AREA)
EP23154029.5A 2022-01-29 2023-01-30 Schutzschalter Pending EP4220676A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202220242595.1U CN217158072U (zh) 2022-01-29 2022-01-29 断路器

Publications (1)

Publication Number Publication Date
EP4220676A1 true EP4220676A1 (de) 2023-08-02

Family

ID=82690521

Family Applications (1)

Application Number Title Priority Date Filing Date
EP23154029.5A Pending EP4220676A1 (de) 2022-01-29 2023-01-30 Schutzschalter

Country Status (2)

Country Link
EP (1) EP4220676A1 (de)
CN (1) CN217158072U (de)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5889249A (en) * 1996-06-28 1999-03-30 Schneider Electric Sa Tightly joined wire mesh deionizing device for a current breaker
US20170169972A1 (en) * 2015-12-10 2017-06-15 Schneider Electric Industries Sas Multipolar air-break circuit breaker including an improved device for filtering quenching gas
US20170278653A1 (en) * 2016-03-24 2017-09-28 Schneider Electric Industries Sas Electrical apparatus for breaking an electric current in air comprising an improved extinguishing gas filtering device
US20190035580A1 (en) * 2017-07-26 2019-01-31 Schneider Electric Industries Sas Extinguishing gas filtering device and electric current switchgear comprising such a filtering device

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5889249A (en) * 1996-06-28 1999-03-30 Schneider Electric Sa Tightly joined wire mesh deionizing device for a current breaker
US20170169972A1 (en) * 2015-12-10 2017-06-15 Schneider Electric Industries Sas Multipolar air-break circuit breaker including an improved device for filtering quenching gas
US20170278653A1 (en) * 2016-03-24 2017-09-28 Schneider Electric Industries Sas Electrical apparatus for breaking an electric current in air comprising an improved extinguishing gas filtering device
US20190035580A1 (en) * 2017-07-26 2019-01-31 Schneider Electric Industries Sas Extinguishing gas filtering device and electric current switchgear comprising such a filtering device

Also Published As

Publication number Publication date
CN217158072U (zh) 2022-08-09

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