US2822448A - Air-break circuit breaker - Google Patents

Air-break circuit breaker Download PDF

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Publication number
US2822448A
US2822448A US475697A US47569754A US2822448A US 2822448 A US2822448 A US 2822448A US 475697 A US475697 A US 475697A US 47569754 A US47569754 A US 47569754A US 2822448 A US2822448 A US 2822448A
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US
United States
Prior art keywords
arc
resin
air
layer
circuit breaker
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.)
Expired - Lifetime
Application number
US475697A
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English (en)
Inventor
Wegmann Robert
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.)
BBC Brown Boveri AG Germany
Original Assignee
Bbc Brown Boveri & Cie
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.)
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Publication date
Application filed by Bbc Brown Boveri & Cie filed Critical Bbc Brown Boveri & Cie
Application granted granted Critical
Publication of US2822448A publication Critical patent/US2822448A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H1/00—Spinning or twisting machines in which the product is wound-up continuously
    • D01H1/14—Details
    • D01H1/42—Guards or protectors for yarns or threads, e.g. separator plates, anti-ballooning devices
    • D01H1/425—Anti-ballooning rings
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
    • H01B3/18—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances
    • H01B3/30—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes
    • H01B3/40—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes epoxy resins
    • 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

Definitions

  • AIR-BREAK CIRCUIT BREAKER Filed Dec. 16, 1954 5a nEs//v F164- RESIN co/vTA//v/NG SELF HARDEN/NG RESIN INVENTOR l 00A/'PSE RUT/LE ATTORNEYS ROBERT wfsMa/v/g ⁇ United States Patent Office AIR-BREAK CIRCUIT BREAKER Robert Wegmann, Wettingen, Switzerland, assignor to Aktiengesellschaft Brown, Boveri & Cie, Baden, Switzerland, a joint-stock company Application December 16, 1954, Serial No. 475,697
  • This invention relates to air-break circuit breakers with arc-suppressing chambers and more particularly to the composition of the walls of the arc-suppressing chamber.
  • An object of the invention is to provide air-break circuit breakers, particularly automatic circuit breakers having a blast coil, with arc-suppressing chambers having walls formed of a hardenable resin containing a refractory oxide which protects the resin against destruction by the arc temperature. More speciiically, an object is to provide a circuit breaker of the type stated in which the resin walls of the arc-suppressing chamber are lled with rutile in an amount, by weight, which is a multiple of the resin content of the wall.
  • Fig. 1 is a longitudinal section through a circuit breaker embodying the invention
  • Fig. 2 is a transverse section on line 2 2 of Fig. 1;
  • Fig. 3 is a schematic diagram illustrative of a process for forming a wall of the arc-suppressing chamber.
  • Fig. 4 is an edge elevation of another form of wall for the arc-suppressing chamber.
  • the reference numerals 1, 2 identify the contacts of an air-break circuit breaker which are separated by automatically operating mechanism of any known type in the event of an overload or a fault on the line.
  • the contacts open adjacent the mouth of an arc-suppressing chamber 3 into which the arc is deected by a coil 4 in the usual manner.
  • the chamber 3 may be of any known form and usually will have an open top covered by a screen 3' but, in accordance with the invention, the arc-contacted surfaces of the chamber walls are provided by a layer 5 of a casting or self-hardening resin, for example a low-pressure casting resin of ethoxylin type such as that known as Araldit, with a iilling of rutile, Ti02, in a proportion by weight of about 6:1 of the resin.
  • a casting or self-hardening resin for example a low-pressure casting resin of ethoxylin type such as that known as Araldit, with a iilling of rutile, Ti02, in a proportion by weight of about 6:1 of the resin.
  • This relatively large proportion of inorganic filler prevents the combustion of the resin even in the case of a formation of soot on the walls of the arc-suppressing chamber.
  • the walls of the arc-suppressing chamber need not necessarily consist entirely of a hardenable plastic with a rutile tilling as it is possible to build up the wall material by rst forming a relatively thin layer of rutile filled resin and then to cast on at least one additional layer 5a consisting of a hardenable resin and some other iilling material, for example quartz powder, SiO2, until the desired wall thickness is attained.
  • additional layer 5a consisting of a hardenable resin and some other iilling material, for example quartz powder, SiO2, until the desired wall thickness is attained.
  • Other filling materials such as aluminum oxide, A1203, or magnesia, MgO, may be employed in such additional layers.
  • Such multilayer walls have the great advantage that the layer of resin and rutile which is contacted by the arc has favorable dielectric and thermal characteristics while the additional layer or layers have a much greater mechanical stability and electric breakdown resistance than the iirst layer.
  • multi-layer plates for the manufacture of rectangular arc-suppressing chambers may be built up with a layer 5 containing rutile and a superposed layer 5a comprising a resin with a iilling of silica, aluminum oxide or magnesia.
  • the arc-blasting coil 4 and its leads can easily be incorporated in the walls of the arc-suppressing chamber, Yreferably in the outer layer 5a comprising the resin and powdered quartz or the like when a multi-layer wall is employed.
  • the metal strips 8 which are usually incorporated in arc-suppressing chambers may, if desired, be supported by embedding edges thereof in the inner resin-rutile layer.
  • a sparking chamber for electrical switches of the air-break circuit breaker type having blast coils the walls of said chamber being of a multi-layer construction comprising an inner layer consisting of coarse lumps of rutile and a mixture of self-hardening resin of the ethoxylin type and powdered rutile lling the interstices between said lumps of rutile, and a second layer cast upon said iirst layer, said second layer consisting of a selfhardening resin of the ethoxylin type and a refractory oxide iiller selected from the group consisting of aluminum oxide, quartz and magnesia.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Arc-Extinguishing Devices That Are Switches (AREA)
US475697A 1953-12-18 1954-12-16 Air-break circuit breaker Expired - Lifetime US2822448A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH2822448X 1953-12-18

Publications (1)

Publication Number Publication Date
US2822448A true US2822448A (en) 1958-02-04

Family

ID=4572042

Family Applications (1)

Application Number Title Priority Date Filing Date
US475697A Expired - Lifetime US2822448A (en) 1953-12-18 1954-12-16 Air-break circuit breaker

Country Status (4)

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US (1) US2822448A (en))
BE (1) BE534130A (en))
CH (1) CH316524A (en))
FR (1) FR1116031A (en))

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2987482A (en) * 1959-06-30 1961-06-06 Republic Aviat Corp Method for making a solid dielectric
US3472982A (en) * 1966-07-29 1969-10-14 Square D Co Arc chute
US4082931A (en) * 1976-04-12 1978-04-04 Westinghouse Electric Corporation Arc chute
US5691402A (en) * 1996-09-13 1997-11-25 Composite Technology Group, Llc Composite tooling material having vinyl ester resins and fillers
US6309587B1 (en) 1999-08-13 2001-10-30 Jeffrey L. Gniatczyk Composite molding tools and parts and processes of forming molding tools

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010026512B3 (de) * 2010-07-08 2011-12-01 Abb Ag Installationsschaltgerät mit Gehäuse aus Thermoplast oder Duroplast sowie Verfahren zu dessen Herstellung

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1431961A (en) * 1918-07-25 1922-10-17 Westinghouse Electric & Mfg Co Arc shield
US1878959A (en) * 1928-09-27 1932-09-20 Westinghouse Electric & Mfg Co Circuit interrupter
US2165819A (en) * 1934-06-05 1939-07-11 Steatit Magnesia Ag Electric insulator and method of making same
US2322353A (en) * 1939-11-04 1943-06-22 Western Electric Co Dielectric material
US2386659A (en) * 1941-11-08 1945-10-09 Gen Electric Dielectric material
US2439674A (en) * 1944-10-17 1948-04-13 Gen Electric Current limiting fuse
FR981678A (fr) * 1949-01-10 1951-05-29 Perfectionnement apporté aux bougies d'allumage
US2645693A (en) * 1949-09-13 1953-07-14 Fed Electric Prod Co Molded casing for electrical apparatus
US2656442A (en) * 1950-11-13 1953-10-20 Allen Bradley Co Arc extinguishing electrical switch apparatus
FR59145E (fr) * 1944-08-04 1954-04-23 Merlin Gerin Perfectionnements aux chambres de soufflage des disjoncteurs et des contacteurs
US2707177A (en) * 1952-11-29 1955-04-26 Gen Electric Ethoxyline-triallyl cyanurate resinous compositions

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1431961A (en) * 1918-07-25 1922-10-17 Westinghouse Electric & Mfg Co Arc shield
US1878959A (en) * 1928-09-27 1932-09-20 Westinghouse Electric & Mfg Co Circuit interrupter
US2165819A (en) * 1934-06-05 1939-07-11 Steatit Magnesia Ag Electric insulator and method of making same
US2322353A (en) * 1939-11-04 1943-06-22 Western Electric Co Dielectric material
US2386659A (en) * 1941-11-08 1945-10-09 Gen Electric Dielectric material
FR59145E (fr) * 1944-08-04 1954-04-23 Merlin Gerin Perfectionnements aux chambres de soufflage des disjoncteurs et des contacteurs
US2439674A (en) * 1944-10-17 1948-04-13 Gen Electric Current limiting fuse
FR981678A (fr) * 1949-01-10 1951-05-29 Perfectionnement apporté aux bougies d'allumage
US2645693A (en) * 1949-09-13 1953-07-14 Fed Electric Prod Co Molded casing for electrical apparatus
US2656442A (en) * 1950-11-13 1953-10-20 Allen Bradley Co Arc extinguishing electrical switch apparatus
US2707177A (en) * 1952-11-29 1955-04-26 Gen Electric Ethoxyline-triallyl cyanurate resinous compositions

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2987482A (en) * 1959-06-30 1961-06-06 Republic Aviat Corp Method for making a solid dielectric
US3472982A (en) * 1966-07-29 1969-10-14 Square D Co Arc chute
US4082931A (en) * 1976-04-12 1978-04-04 Westinghouse Electric Corporation Arc chute
US5691402A (en) * 1996-09-13 1997-11-25 Composite Technology Group, Llc Composite tooling material having vinyl ester resins and fillers
US6309587B1 (en) 1999-08-13 2001-10-30 Jeffrey L. Gniatczyk Composite molding tools and parts and processes of forming molding tools

Also Published As

Publication number Publication date
CH316524A (de) 1956-10-15
BE534130A (en))
FR1116031A (fr) 1956-05-03

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