EP1979922A1 - Arc extinguishing chamber for circuit breaker having an exhaust passage for the arc gas - Google Patents

Arc extinguishing chamber for circuit breaker having an exhaust passage for the arc gas

Info

Publication number
EP1979922A1
EP1979922A1 EP07702320A EP07702320A EP1979922A1 EP 1979922 A1 EP1979922 A1 EP 1979922A1 EP 07702320 A EP07702320 A EP 07702320A EP 07702320 A EP07702320 A EP 07702320A EP 1979922 A1 EP1979922 A1 EP 1979922A1
Authority
EP
European Patent Office
Prior art keywords
plates
extinguishing
extinguishing chamber
cover
created
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Withdrawn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
EP07702320A
Other languages
German (de)
French (fr)
Inventor
Milos Petracek
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.)
Siemens AG
Original Assignee
Oez sro
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 Oez sro filed Critical Oez sro
Publication of EP1979922A1 publication Critical patent/EP1979922A1/en
Withdrawn legal-status Critical Current

Links

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
    • 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
    • H01H9/345—Mounting of arc chutes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/02—Housings; Casings; Bases; Mountings
    • H01H71/0207—Mounting or assembling the different parts of the circuit breaker
    • H01H71/0228—Mounting or assembling the different parts of the circuit breaker having provisions for interchangeable or replaceable parts

Definitions

  • the invention concerns extinguishing chamber for electrical apparatuses, particularly for circuit breakers and other switching apparatuses.
  • a voltaic arc In electrical apparatuses, while switching off the short-circuit current, an intense development of a voltaic arc occurs, this being ionized gas - plasma, containing positive and negative ions.
  • the voltaic arc is characterized by great current density, high temperature and an extensive amount of radiation in broad spectrum.
  • the voltaic arc intensely disrupts the material of the contacts, with the material being smelted and sprayed.
  • the contacts may suffer destruction, ruptures etc., due to the fact, that an extensive temperature gradient develops on them at the same time.
  • the voltaic arc In order to minimize the disruption of the contacts, the voltaic arc must be transferred as quickly as possible to the sparking plate and consequently, the arc must be spread dynamically to the extinguishing plates of the extinguishing chamber. Intensive cooling of the voltaic arc by the extinguishing plates as well as pressure conditions in the extinguishing chamber are the crucial factors for extinguishing the voltaic arc.
  • the known extinguishing chambers are set-up, for example, from two side plates with holes, into which the extinguishing plates are inserted.
  • the assembly is being secured transversely by rivets or screws, or alike.
  • the extinguishing chambers are made from two thermosetting moldings, i.e. from a base into which the extinguishing plates are inserted, and from the cover securing the extinguishing plates.
  • This concept does not offer the possibility to mount filter and deionization elements into the body of the extinguishing chamber and thus to efficiently set the pressure and technologically effective conditions influencing the voltaic arc being extinguished, also with respect to destructive effects of the plasma during its outburst into the vicinity of the electrical apparatus.
  • the goal is to create an extinguishing chamber with adjustable pressure conditions for voltaic arc extinguishing with efficient influence upon the plasma outburst while switching off short-circuit current, as well as to create an extinguishing chamber of a modular set-up, without the use of additional binding elements, forming a firm assembly not necessary to being secured in any way against possible dissolution, and alike, whereas the given goal is achieved by a solution utilizing the invention, the essence of which is, that the extinguishing chamber consists from a two-part box, composed from a casing with extinguishing plates and sparking plates, to sides of which a cover with exhaust duct is tightly fitted, and at its beginning, at the dividing plane of the two-part box, a perimetral notch is created for insertion of at least one arbitrarily technologically effective filler with holes.
  • a perforated transversal wall is placed in front of the perimetral notch in the exhaust duct, created at the time of cover production, technologically forming, for example, the filter element.
  • the perimetral notch is created in the cover and contains cushion faces and lateral guide surfaces and at least one stopping jut for the aforesaid at least one filler.
  • Fig.l is the vertical center section of the two-part box of the extinguishing chamber, with all the elements contained in it marked, including alternative filler fitted in the perimetral notch in the exhaust duct of the extinguishing chamber cover
  • Fig.2 is the angle view of the extinguishing chamber in its disassembled state.
  • Extinguishing chamber 1 for electrical apparatuses, particularly circuit breakers, is inset into the not-illustrated hollow in the base of the electrical apparatus and it encompasses, by a bundle of echeloned extinguishing plates 2 and sparking plates 3, the trajectory of the pathway of the end of the not-illustrated moving contact of the electrical apparatus.
  • Extinguishing chamber 1 (Fig.l) consists of a two-part box, composed from a casing 4 with extinguishing plates 2 and sparking plates 3 and of a cover 5 with exhaust duct 6, tightly fitted to it.
  • a perimetral notch 7 is created for insertion of at least one, arbitrarily technologically effective filler 8, e.g. filter element 9 and/or deionization element 10 with appropriate holes (Fig.2).
  • the fillers 8 may be of varying construction, from a non-magnetic material or with a grid from magnetic metal, or alike, inclusive of various perforation configuration.
  • Perimetral notch 7 (Fig.2), is created, according to the example of carrying out, in the cover 5 of the two-part box and it contains, for fillers 8, a cushion face 11 and lateral guide surfaces 12 and at least one stopping jut 13, preventing spontaneous drop-out of the filler 8 or filler couple 8 from the perimetral notch 7. In some cases, instead of cushion face
  • a not-illustrated perforated transversal wall may be placed in front of the perimetral notch 7, creating in itself, for example, a filter element 9, created directly in production during cover 5 manufacture.
  • Extinguishing chamber 1. is designed as a two-part box formed from thermosetting molds, while inside the casing 4 guide ribs 14 are created for insertion of the extinguishing plates 2 and sparking plates 3.
  • Cover 5 of the extinguishing chamber 1 secures the extinguishing plates 2 and sparking plates 3 against release and keeps them in their proper position by its inner colar 15, which also seals the two-part box of the extinguishing chamber 1 against emanation diffusion from the extinguishing chamber 1 into the immediate vicinity in the hollow of the electrical apparatus.
  • Inner collar 15 may be fitted with various other juts, for example juts 16, for stopping of the upper sparking plate 3, and alike.
  • Cover 5 also regulates the gas blowout through the filter element 9 and/or deionization element 10 into the exhaust duct 6. Construction of the extinguishing chamber 1 does not imply usage of filter element 9 and deionization element 10. Extinguishing chamber 1 is functional even without the use of any of these various technologically effective fillers 8.
  • a peep-hole opening 17 is present, for not-illustrated moving contact of the electrical apparatus.

Landscapes

  • Arc-Extinguishing Devices That Are Switches (AREA)
  • Breakers (AREA)
  • Gas-Insulated Switchgears (AREA)
  • Vertical, Hearth, Or Arc Furnaces (AREA)

Abstract

Extinguishing chamber (1) for electrical apparatuses, particularly circuit breakers, inset into the hollow of the base of the electrical apparatus and encompassing by a bundle of echeloned extinguishing plates (2) and sparking plates (3), the trajectory of the pathway of the end of the moving contact, consisting of a two-part box, composed from a casing (4) with extinguishing plates (2) and sparking plates (3) to sides of which a cover (5) with exhaust duct (6), is tightly fitted, and at its beginning, at the dividing plane of the two-part box, a perimetral notch (7) is created for insertion of at least one arbitrarily technologically effective filler (8) with holes, whereas the perimetral notch (7) is created in the cover (5) and it contains cushion faces (11) and lateral guide surfaces (12) and at least one stopping jut (13) for filler (8).

Description

ARC EXTINGUISHING CHAMBER FOR CIRCUIT BREAKER HAVING AN EXHAUST PASSAGE FOR THE ARC GAS
Technical Field
The invention concerns extinguishing chamber for electrical apparatuses, particularly for circuit breakers and other switching apparatuses.
Background Art
In electrical apparatuses, while switching off the short-circuit current, an intense development of a voltaic arc occurs, this being ionized gas - plasma, containing positive and negative ions. The voltaic arc is characterized by great current density, high temperature and an extensive amount of radiation in broad spectrum. The voltaic arc intensely disrupts the material of the contacts, with the material being smelted and sprayed. The contacts may suffer destruction, ruptures etc., due to the fact, that an extensive temperature gradient develops on them at the same time. Thus, it is necessary to limit the effects of the voltaic arc upon the contacts and to extinguish the voltaic arc as soon as possible. In order to minimize the disruption of the contacts, the voltaic arc must be transferred as quickly as possible to the sparking plate and consequently, the arc must be spread dynamically to the extinguishing plates of the extinguishing chamber. Intensive cooling of the voltaic arc by the extinguishing plates as well as pressure conditions in the extinguishing chamber are the crucial factors for extinguishing the voltaic arc.
From the construction point of view, the known extinguishing chambers are set-up, for example, from two side plates with holes, into which the extinguishing plates are inserted. The assembly is being secured transversely by rivets or screws, or alike.
In another known construction set-up, the extinguishing chambers are made from two thermosetting moldings, i.e. from a base into which the extinguishing plates are inserted, and from the cover securing the extinguishing plates. This concept does not offer the possibility to mount filter and deionization elements into the body of the extinguishing chamber and thus to efficiently set the pressure and technologically effective conditions influencing the voltaic arc being extinguished, also with respect to destructive effects of the plasma during its outburst into the vicinity of the electrical apparatus.
Nature of the Invention
The goal is to create an extinguishing chamber with adjustable pressure conditions for voltaic arc extinguishing with efficient influence upon the plasma outburst while switching off short-circuit current, as well as to create an extinguishing chamber of a modular set-up, without the use of additional binding elements, forming a firm assembly not necessary to being secured in any way against possible dissolution, and alike, whereas the given goal is achieved by a solution utilizing the invention, the essence of which is, that the extinguishing chamber consists from a two-part box, composed from a casing with extinguishing plates and sparking plates, to sides of which a cover with exhaust duct is tightly fitted, and at its beginning, at the dividing plane of the two-part box, a perimetral notch is created for insertion of at least one arbitrarily technologically effective filler with holes.
According to the invention, it was found advantageous, that without additional insertion, a perforated transversal wall is placed in front of the perimetral notch in the exhaust duct, created at the time of cover production, technologically forming, for example, the filter element.
According to the invention, it was found advantageous for reliable and tight placement of arbitrary technologically effective element into the exhaust duct, that the perimetral notch is created in the cover and contains cushion faces and lateral guide surfaces and at least one stopping jut for the aforesaid at least one filler. Description of the Figures in the Drawings
Further advantages and effects of the invention are apparent from the attached drawing, where Fig.l is the vertical center section of the two-part box of the extinguishing chamber, with all the elements contained in it marked, including alternative filler fitted in the perimetral notch in the exhaust duct of the extinguishing chamber cover, Fig.2 is the angle view of the extinguishing chamber in its disassembled state.
Example of Carrying Out of the Invention
Extinguishing chamber 1 for electrical apparatuses, particularly circuit breakers, is inset into the not-illustrated hollow in the base of the electrical apparatus and it encompasses, by a bundle of echeloned extinguishing plates 2 and sparking plates 3, the trajectory of the pathway of the end of the not-illustrated moving contact of the electrical apparatus.
Extinguishing chamber 1 (Fig.l) consists of a two-part box, composed from a casing 4 with extinguishing plates 2 and sparking plates 3 and of a cover 5 with exhaust duct 6, tightly fitted to it.
At the beginning of the exhaust duct 6, in the dividing plane of the two-part box, a perimetral notch 7 is created for insertion of at least one, arbitrarily technologically effective filler 8, e.g. filter element 9 and/or deionization element 10 with appropriate holes (Fig.2). The fillers 8 may be of varying construction, from a non-magnetic material or with a grid from magnetic metal, or alike, inclusive of various perforation configuration. By an effective combination of filler 8 usage, eventually their displacement, it is possible, for the given electrical apparatus, to effectively set desired pressure conditions in the extinguishing chamber 1 and optionally, to eliminate unwanted external effects of the plasma of the voltaic arc being extinguished while switching-off the short-circuit currents, both inside the extinguishing chamber 1, as well as at the outlet of the exhaust duct 6.
Perimetral notch 7 (Fig.2), is created, according to the example of carrying out, in the cover 5 of the two-part box and it contains, for fillers 8, a cushion face 11 and lateral guide surfaces 12 and at least one stopping jut 13, preventing spontaneous drop-out of the filler 8 or filler couple 8 from the perimetral notch 7. In some cases, instead of cushion face
11 in the exhaust duct 6, a not-illustrated perforated transversal wall may be placed in front of the perimetral notch 7, creating in itself, for example, a filter element 9, created directly in production during cover 5 manufacture.
Extinguishing chamber 1. is designed as a two-part box formed from thermosetting molds, while inside the casing 4 guide ribs 14 are created for insertion of the extinguishing plates 2 and sparking plates 3. Cover 5 of the extinguishing chamber 1 secures the extinguishing plates 2 and sparking plates 3 against release and keeps them in their proper position by its inner colar 15, which also seals the two-part box of the extinguishing chamber 1 against emanation diffusion from the extinguishing chamber 1 into the immediate vicinity in the hollow of the electrical apparatus. Inner collar 15 may be fitted with various other juts, for example juts 16, for stopping of the upper sparking plate 3, and alike. Cover 5 also regulates the gas blowout through the filter element 9 and/or deionization element 10 into the exhaust duct 6. Construction of the extinguishing chamber 1 does not imply usage of filter element 9 and deionization element 10. Extinguishing chamber 1 is functional even without the use of any of these various technologically effective fillers 8.
On the front side of the casing 4 of the extinguishing chamber 1., a peep-hole opening 17 is present, for not-illustrated moving contact of the electrical apparatus.

Claims

P A T E N T C L A I M S
1. Extinguishing chamber for electrical apparatuses, particularly circuit breakers, inset into the hollow of the base of the electrical apparatus and encompassing by a bundle of echeloned extinguishing plates and sparking plates the trajectory of the pathway of the end of the moving contact, which is characterized in that it consists of a two-part box, composed from a casing (4) with extinguishing plates (2) and sparking plates (3), to sides of which a cover (5) with exhaust duct (6) is tightly fitted, and at its beginning, at the dividing plane of the two-part box, a perimetral notch (7) is created for insertion of at least one arbitrarily technologically effective filler (8) with holes.
2. Extinguishing chamber according to claim 1, which is characterized in that in the exhaust duct (6), a perforated transversal wall is placed in front of the perimetral notch (7), creating one of the fillers (8).
3. Extinguishing chamber according to claim 1, which is characterized in that the perimetral notch (7) is created in the cover (5) and it contains cushion faces (11) and lateral guide surfaces (12) and at least one stopping jut (13) for filler (8).
EP07702320A 2006-01-25 2007-01-18 Arc extinguishing chamber for circuit breaker having an exhaust passage for the arc gas Withdrawn EP1979922A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CZ20060052A CZ301022B6 (en) 2006-01-25 2006-01-25 Quenching chamber for electric apparatuses particularly for circuit-breakers
PCT/CZ2007/000002 WO2007085209A1 (en) 2006-01-25 2007-01-18 Arc extinguishing chamber for circuit breaker having an exhaust passage for the arc gas

Publications (1)

Publication Number Publication Date
EP1979922A1 true EP1979922A1 (en) 2008-10-15

Family

ID=38069353

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07702320A Withdrawn EP1979922A1 (en) 2006-01-25 2007-01-18 Arc extinguishing chamber for circuit breaker having an exhaust passage for the arc gas

Country Status (6)

Country Link
EP (1) EP1979922A1 (en)
KR (1) KR100996799B1 (en)
CN (1) CN101371323B (en)
CZ (1) CZ301022B6 (en)
RU (1) RU2394298C2 (en)
WO (1) WO2007085209A1 (en)

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Publication number Priority date Publication date Assignee Title
EP2591485A1 (en) * 2010-07-08 2013-05-15 Larsen & Toubro Limited An improved arc chamber assembly for use in moulded case circuit breakers
CN102005347A (en) * 2010-12-01 2011-04-06 沈阳斯沃电器有限公司 Double breaking point breaker arc extinguishing system
US8492662B2 (en) * 2011-02-28 2013-07-23 Abb Inc. Arc-resistant dry type transformer enclosure having arc fault damper apparatus
CN102881492B (en) * 2012-09-25 2014-09-10 浙江天正电气股份有限公司 Air-blowing arcing shield
FR3005781B1 (en) * 2013-05-17 2016-09-23 Schneider Electric Ind Sas CUTTING CHAMBER FOR ELECTRICAL PROTECTION APPARATUS AND ELECTRICAL PROTECTION APPARATUS HAVING THE SAME.
EP3022810A4 (en) 2013-07-17 2017-05-10 Schneider Electric USA, Inc. Internal arc management and ventilation for electrical equipment
CN104392858A (en) * 2014-11-28 2015-03-04 德力西电气有限公司 Arc extinguish chamber deionization device and circuit breaker arc extinguish chamber with same
EP3257123B1 (en) * 2015-02-10 2019-08-14 Siemens Aktiengesellschaft Arc fault resistant electric equipment
FR3065316B1 (en) * 2017-04-14 2019-07-05 Schneider Electric Industries Sas CUTTING GAS FILTRATION DEVICE FOR CUTTING APPARATUS OF ELECTRIC CURRENT, AND APPARATUS FOR CUTTING ELECTRIC CURRENT COMPRISING SAID FILTERING DEVICE
FR3069699B1 (en) * 2017-07-26 2019-09-06 Schneider Electric Industries Sas CUTTING GAS FILTRATION DEVICE AND CURRENT CUTTING APPARATUS COMPRISING SUCH A FILTERING DEVICE
FR3073974B1 (en) * 2017-11-23 2019-12-20 Schneider Electric Industries Sas LOW VOLTAGE MULTIPOLLE CIRCUIT BREAKER

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FR2451097A1 (en) * 1979-02-07 1980-10-03 Terasaki Denki Sangyo Kk ELECTRIC AIR CIRCUIT SWITCH, MECHANISM AND HOUSING
CZ280519B6 (en) * 1990-07-20 1996-02-14 Schneider Electric A.S. Enclosed quenching chamber of an electromagnetic air-break contactor
US5589672A (en) * 1994-06-14 1996-12-31 Fuji Electric Co., Ltd. Circuit breaker with arc quenching device and vent
CZ281665B6 (en) * 1995-10-24 1996-12-11 Oez Letohrad S.R.O. Extinguishing chamber, particularly for electric switching gears of small and low voltage
DE29612636U1 (en) 1996-07-15 1997-08-14 Siemens AG, 80333 München Arc quenching chamber for low voltage circuit breakers
JPH09171762A (en) * 1996-12-26 1997-06-30 Hitachi Ltd Circuit breaker
US6222147B1 (en) * 2000-03-09 2001-04-24 General Electric Company Circuit breaker arc exhaust baffle with variable aperture
DE10038642A1 (en) * 2000-07-28 2002-02-07 Siemens Ag Fastening for cover of arc extinction chamber in air-break low voltage switchgear, employs system of push-in guides and catches to avoid use of screws.
CZ298734B6 (en) * 2001-09-10 2008-01-09 Lekov A S Extinguishing chamber
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Also Published As

Publication number Publication date
KR20080086497A (en) 2008-09-25
CN101371323B (en) 2013-03-06
CZ200652A3 (en) 2007-08-08
KR100996799B1 (en) 2010-11-25
CN101371323A (en) 2009-02-18
CZ301022B6 (en) 2009-10-14
WO2007085209A1 (en) 2007-08-02
RU2008132012A (en) 2010-02-27
RU2394298C2 (en) 2010-07-10

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