EP4064307A1 - Elektrisches schaltgerät - Google Patents

Elektrisches schaltgerät Download PDF

Info

Publication number
EP4064307A1
EP4064307A1 EP22164382.8A EP22164382A EP4064307A1 EP 4064307 A1 EP4064307 A1 EP 4064307A1 EP 22164382 A EP22164382 A EP 22164382A EP 4064307 A1 EP4064307 A1 EP 4064307A1
Authority
EP
European Patent Office
Prior art keywords
metal plates
stack
switching device
casing
main part
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Withdrawn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
EP22164382.8A
Other languages
English (en)
French (fr)
Inventor
Pascal Hannequin
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.)
Schneider Electric Industries SAS
Original Assignee
Schneider Electric Industries SAS
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 Schneider Electric Industries SAS filed Critical Schneider Electric Industries SAS
Publication of EP4064307A1 publication Critical patent/EP4064307A1/de
Withdrawn legal-status Critical Current

Links

Images

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
    • 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
    • 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
    • H01H9/36—Metal parts
    • H01H2009/365—Metal parts using U-shaped plates

Definitions

  • the present invention relates to an electrical switching apparatus.
  • the invention is particularly applicable to the field of electrical protection and more particularly to miniature circuit breakers (MCB, for “Miniature Circuit Breaker” in English) used to protect low-voltage electrical installations.
  • MBB miniature circuit breakers
  • Many electrical switching devices of the electromechanical type such as circuit breakers, generally comprise an interrupting chamber configured to extinguish an electric arc which appears following a trip when the electrical contacts of the switching device are opened.
  • the interrupting chamber typically comprises a stack of metal plates superimposed one above the other to lengthen and thus extinguish the electric arc.
  • the plates are held by support structures, such as side flanges.
  • One or more orifices provided in the casing allow the cut-off gases to be discharged outside the switchgear.
  • one aspect of the invention relates to an electrical switching device, comprising a casing and an arcing chamber housed in the casing, the arcing chamber comprising a stack of metal plates, the switching apparatus further comprising a separation piece placed at the outlet of the interrupting chamber, the separation piece being placed in contact with the stack of metal plates, perpendicular to the metal plates, being at least partially inserted into the grid and/or between the metal plates of the stack, so as to separate the flow of gas leaving the interrupting chamber.
  • the figure 1 , 2 and 3 show an example of an electrical switching apparatus 2 according to embodiments of the invention.
  • the switching device 2 is an electromechanical device.
  • switching device 2 is an electrical protection device, such as an air-break circuit breaker.
  • the switching device 2 a miniature circuit breaker (MCB, for "Miniature Circuit Breaker” in English).
  • MB miniature circuit breaker
  • the switching device 2 is, for example, more particularly intended to be used to protect electrical installations at low electrical voltage (for example electrical voltages less than or equal to 1000 V AC).
  • the switching device 2 comprises a casing 4 which delimits an interior volume in which all or part of the components of the switching device 2 are housed.
  • the casing 4 comprises a first casing part 6 and a second casing part 8 having complementary shapes and being intended to be combined to form the casing 4.
  • the first part 6 and the second part 8 can for example take the form of two half-shells, for example symmetrical.
  • the first part 6 can be a main body and the second part 8 can be a lid.
  • the box 4 is made of an electrically insulating material, for example a thermoset polymer, such as polyamide.
  • switching apparatus 2 further includes electrical connection terminals 10, at least one movable electrical contact, a switching mechanism configured to move the movable electrical contact, and arcing chamber 12.
  • the movable electrical contact (not shown) is movable between an open position and a closed position to, respectively, prevent or allow the flow of electric current between the electrical connection terminals 10.
  • the or each movable electrical contact could be coupled to one or several fixed electrical contacts.
  • the switching mechanism (not shown) can be coupled to a trip device configured to detect an electrical fault, such as an overcurrent or a short circuit.
  • the switching mechanism can also be coupled to a control lever accessible to a user from outside the box 4.
  • the interrupting chamber 12 is configured to extinguish an electric arc which appears between the electrical contacts when they open following a triggering of the device 2 while an electric current is flowing between the connection terminals 10.
  • the interrupting chamber 12 comprises a stack of metal plates 14 superimposed one above the other in a stacking direction, which here is oriented vertically or essentially vertically when the switching device 2 is in the operating configuration (for example mounted on an electrical panel).
  • the metal plates 14 are arranged in the stack being spaced apart two by two by a spacing 15.
  • support structures 16 such as side flanges, which are for example made of plastic material, preferably flame-retardant plastic material, for example poly aramid, such as Nomex material. (trademark).
  • the interrupting chamber 12 can be formed in a dedicated compartment of the casing 4, for example by being delimited by internal walls.
  • One or more outlet orifices 18 are made in the box 4 and allow the cut-off gases (hot and ionized gases ejected from the box 4 and resulting from the action of the electric arc in the cut-off chamber 12 following the opening of the contacts) from being rejected outside the casing 4 of the switching device 2.
  • the outlet orifice(s) 18 are, for example, fluidically connected to the outlet of the interrupting chamber 12 by a channel formed in the casing 4.
  • Guide elements such as baffles, can be arranged in the channel to regulate the flow of cutoff gas.
  • the switching device 2 further comprises a separation piece 20 placed at the outlet of the interrupting chamber 12, so as to separate the flow of gas leaving the interrupting chamber 12.
  • the separation piece 20 is placed in contact with the stack of metal plates 14, perpendicular to the metal plates, being at least partially inserted into the interstitial spaces 15 between the metal plates of the stack.
  • the separation piece 20 is illustrated in an exploded view, while on the picture 3 , the separation piece 20 is illustrated in an operating configuration, assembled with the stack of metal plates 14.
  • the separation piece 20 comprises a main part 22 in the form of a plate and a curved portion 24 in the shape of an L extending perpendicularly with respect to the main part 22.
  • the main part 22 is aligned in the direction of the stack of metal plates. In the example illustrated, the main part 22 is aligned vertically or essentially vertically.
  • the curved L-shaped portion 24 comprises a first flat part which extends perpendicular to the main part 22 and along an edge of the main part 22, and a second plate-shaped part which extends perpendicular to said edge of the main part 22, for example by being arranged horizontally.
  • the separation piece 20 also comprises a plurality of positioning portions 26 made on one edge of the main part 22.
  • the positioning portions 26 are configured to be inserted between the metal plates 14 of the stack, for example in the interstitial spaces 15.
  • the positioning pieces 26 have the shape of a lug, or of a hook, or of a protrusion, or of any other appropriate structure making it possible to prevent a translational movement along the direction of the stack when the piece of separation 20 is inserted into the stack.
  • the separation piece 20 is made of an electrically insulating material, such as a thermoformed polymer.
  • an electrically insulating material such as a thermoformed polymer.
  • Other materials are however possible as a variant.
  • the positioning portions 26 are formed in one piece with the rest of the separation piece 20.
  • the separation piece 20 is independent, that is to say it does not form part of the casing 4.
  • the separation piece 20 can be manufactured independently of the casing 4, then is installed by insertion in the stack.
  • the figure 4 and 5 represent a possible arrangement of the casing 4 and the interrupting chamber 12.
  • the figure 4 comprises two views showing the respective inner wall of the first housing part 6 and the second housing part 8, respectively.
  • the figure 5 schematically represents a cross-sectional view of the separation piece 20 seen from the rear of the interrupting chamber.
  • the qualifiers "front” and “rear” applied to the interrupting chamber 12 and to its constituent elements are defined according to the direction of circulation of the interrupting gases (that is to say, from the cutoff 12 to outlet port 18).
  • the switching device 2 comprises a grid 30, 32 placed at the output of the stack of metal plates 14.
  • the grid is at least partly formed by half-bars arranged in the manner of a comb and extending from opposite inner walls of the housing 4.
  • the grid is here placed immediately at the outlet of the stack of metal plates 14, preferably in contact with the stack of plates 14.
  • a first grid half 30 includes half-bars 34 which extend from an inner wall of the first housing part 6.
  • a second grid half 32 includes half-bars 36 which extend from an internal wall internal part of the second housing part 8.
  • each of the half-bars 34 of the first half-grid 30 may be aligned with the corresponding half-bar 36 of the second half-grid 32.
  • the half-bars 34 of the first grid half 30 can be offset vertically with respect to the half-bars 36 of the second grid half 32.
  • the distal ends of the opposite half-bars 34, 36 delimit a space (here in the form of a vertical slot) into which the main part 22 of the separation piece is inserted, as illustrated by the figure 5 .
  • the casing parts 6 and/or 8 can include structural and/or positioning elements, such as a baffle 40 to channel the cut-off gases leaving the grid, holding beams 42 perpendicular to the internal walls , to maintain a constant spacing between said internal walls, or else a wall 44 serving to slow down the flow of cut-off gas.
  • a baffle 40 to channel the cut-off gases leaving the grid
  • beams 42 perpendicular to the internal walls
  • a wall 44 serving to slow down the flow of cut-off gas.
  • These elements can be formed in one piece with one or the other of the first casing part 6 and the second casing part 8.
  • Other embodiments are however possible as a variant.
  • the addition of the separation piece 20 makes it possible to divide the flow of cutoff gas leaving the arc chute into two independent flows (this flow leaving being typically oriented parallel to the metal plates 14).
  • the separation piece 20 is particularly simple to assemble and easy to put in place, in particular thanks to the positioning portions 26.
  • the guidance (during assembly) and the holding in position of the separation piece over time 20 are improved.
  • the separation piece 20 makes it possible to better distribute the flow of cut-off gas between the guiding and slowing down elements (such as the wall 44) placed on the internal walls of the casing, and in particular on the first casing part 6. This helps to better balance the cutoff gas flow when releasing pressure during gas ejection.

Landscapes

  • Arc-Extinguishing Devices That Are Switches (AREA)
  • Supplying Of Containers To The Packaging Station (AREA)
  • Control Of Direct Current Motors (AREA)
  • Control Of Electric Motors In General (AREA)
  • Patch Boards (AREA)
  • Switch Cases, Indication, And Locking (AREA)
EP22164382.8A 2021-03-26 2022-03-25 Elektrisches schaltgerät Withdrawn EP4064307A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR2103102A FR3121269B1 (fr) 2021-03-26 2021-03-26 Appareil de commutation électrique

Publications (1)

Publication Number Publication Date
EP4064307A1 true EP4064307A1 (de) 2022-09-28

Family

ID=75850354

Family Applications (1)

Application Number Title Priority Date Filing Date
EP22164382.8A Withdrawn EP4064307A1 (de) 2021-03-26 2022-03-25 Elektrisches schaltgerät

Country Status (4)

Country Link
EP (1) EP4064307A1 (de)
CN (1) CN115132549A (de)
AU (1) AU2022201935A1 (de)
FR (1) FR3121269B1 (de)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5438567A (en) * 1977-08-31 1979-03-23 Matsushita Electric Works Ltd Deionizer
JPS5550559U (de) * 1978-09-29 1980-04-02
JPS55173052U (de) * 1979-05-31 1980-12-11
JPS60149045U (ja) * 1984-03-14 1985-10-03 三菱電機株式会社 回路しや断器
JP2009070601A (ja) * 2007-09-11 2009-04-02 Mitsubishi Electric Corp 回路遮断器
DE102009056190B3 (de) * 2009-11-27 2011-05-12 Abb Ag Lichtbogenlöscheinrichtung und Schaltgerät
CN205692787U (zh) * 2016-06-06 2016-11-16 浙江合兴电工有限公司 一种小型断路器

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5438567A (en) * 1977-08-31 1979-03-23 Matsushita Electric Works Ltd Deionizer
JPS5550559U (de) * 1978-09-29 1980-04-02
JPS55173052U (de) * 1979-05-31 1980-12-11
JPS60149045U (ja) * 1984-03-14 1985-10-03 三菱電機株式会社 回路しや断器
JP2009070601A (ja) * 2007-09-11 2009-04-02 Mitsubishi Electric Corp 回路遮断器
DE102009056190B3 (de) * 2009-11-27 2011-05-12 Abb Ag Lichtbogenlöscheinrichtung und Schaltgerät
CN205692787U (zh) * 2016-06-06 2016-11-16 浙江合兴电工有限公司 一种小型断路器

Also Published As

Publication number Publication date
AU2022201935A1 (en) 2022-10-13
FR3121269B1 (fr) 2023-08-18
FR3121269A1 (fr) 2022-09-30
CN115132549A (zh) 2022-09-30

Similar Documents

Publication Publication Date Title
FR3050566B1 (fr) Disjoncteur a coupure dans l'air presentant une chambre de coupure d'arc electrique amelioree
US9159508B2 (en) Switchgear device having at least one single-pole breaking unit comprising a contact bridge and circuit breaker comprising one such device
CA2737011C (fr) Systeme a clapet pour chambre de coupure, et disjoncteur le comprenant
EP3435394B1 (de) Filtervorrichtung von schaltgas, und abschaltgerät eines elektrischen stroms, das eine solche filtervorrichtung umfasst
EP0538149A1 (de) Baureihe von Niederspannungsschaltern mit Formstoffgehäusen
JP5697671B2 (ja) 回転接点ブリッジを備えた単極遮断ユニット、前記ユニットを備えた開閉デバイスおよび前記デバイスを備えた回路ブレーカ
EP2478537B1 (de) Funktionelle abstandshalter zur trennung von schaltkammern bei einer mehrpoligen trennvorrichtung und schutzschalter
EP3489979B1 (de) Mehrpoliger niederspannungsschalter
EP4064307A1 (de) Elektrisches schaltgerät
US9953789B2 (en) Single-pole breaking unit comprising a rotary contact bridge, and a switchgear device, and circuit breaker comprising such a unit
FR3005781A1 (fr) Chambre de coupure pour un appareil de protection electrique et appareil de protection electrique la comportant.
EP3404681A1 (de) Entfernbares unterbrechungselement für elektrischen strom, und elektrisches unterbrechungsgerät eines elektrischen stroms, das ein solches entfernbares element umfasst
EP3404690B1 (de) Entfernbares unterbrechungselement für elektrischen strom, und elektrisches unterbrechungsgerät eines elektrischen stroms, das ein solches entfernbares element umfasst
EP2478536B1 (de) Anordnung einer doppelummantelten mehrpoligen trennvorrichtung und schutzschalter damit
EP0619592B1 (de) Elektrischer Schutzschalter mit elektrodynamischer Kontaktabstossung und mit Doppellöschkammern
FR2663458A1 (fr) Disjoncteur electrique miniature a echappement de gaz de coupure.
WO2022018053A1 (fr) Chambre de coupure d'arc electrique pour appareil electrique de protection et appareil electrique de protection comprenant au moins une telle chambre de coupure
EP4167260A1 (de) Elektrisches gerät mit filtervorrichtungen für trenngas
EP0713232B1 (de) Schaltkammer eines Lastschalters
EP3367415B1 (de) Stromunterbrechungsgerät mit trennbaren elektrischen kontakten und zur unterbrechung in der luft
JP2018181503A (ja) 回路遮断器
FR2950471A1 (fr) Bloc de coupure unipolaire comportant un pont de contacts rotatif, dispositif de coupure comportant un tel bloc et disjoncteur comportant un tel dispositif

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION HAS BEEN PUBLISHED

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20230329