US2566095A - Oil circuit breaker - Google Patents

Oil circuit breaker Download PDF

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Publication number
US2566095A
US2566095A US723607A US72360747A US2566095A US 2566095 A US2566095 A US 2566095A US 723607 A US723607 A US 723607A US 72360747 A US72360747 A US 72360747A US 2566095 A US2566095 A US 2566095A
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United States
Prior art keywords
boring
circuit breaker
cavities
contact
breaker
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Expired - Lifetime
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US723607A
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English (en)
Inventor
Scarpa Giuseppe
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Individual
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Individual
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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/70—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid
    • H01H33/72—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid having stationary parts for directing the flow of arc-extinguishing fluid, e.g. arc-extinguishing chamber
    • H01H33/75—Liquid-break switches, e.g. oil-break

Definitions

  • the present invention relates to an oil circuit breaker of the column type wherein, by the use of an improved type of explosion chamber, and of an improved actuating system, a highly effective performance is obtained.
  • the circuit breaker according to the invention is characterized by a labyrinth chamber having a plurality of small cavities filled with oil and arranged at different levels, and dilferent radial directions in the arc is trapped so as to bring about many radially directed blasts of oil vapors, each extending in only one direction.
  • the circuit operation of the breaker may be mechanically obtained in a very simple way by means of a shaft, levers and appropriate connecting elements.
  • a movable hollow contact plunger is provided, so that during its downward motion Within the lower part of the enclosing tank, which preferably is separated from the upper one through a diaphragm, a jet of oil is produced at the head of said plunger and directed into the explosion chamber, so that it cooperates effectively in extinguishing the are.
  • a transformer within the oil filled lower part of the same circuit breaker is also provided, as well as an insulating cylindrical casing protecting all metallic parts under tension.
  • a pantograph device is arranged between the contact plunger and the insulating actuating rod for reducing the stroke and the speed of the operating rod in respect to those of the contact plunger.
  • Fig. l is a partial sectional side elevation of a pole of a breaker, according to the present invenion;
  • Figs. 2 and 2a are two cross-sectional views along an axial and a radial plane respectively of the embodiment shown in Fig. 1;
  • Fig. 3 is a sectional view of a detail of the operating cylinder and of the locking and signaling device
  • Fig. 4 is an axial section of another embodiment of the improved breaker according to the invention.
  • Fig. 5 is a cross-section of another embodiment of the invention, in which the explosion chamber is located at the bottom instead of at the top of the column and a Fig. 6 is an axial section of the central part of an embodiment provided with a pantograph device.
  • the reference numeral l indicates the terminals, 2 the stationary contact, 3 the movable contact, 4 the piston which operates the lifting of said contact, 5 the cylinder into which slides said piston, 6 the stop ring of the movable contact, I a latch locking the movable contact 3 in its closed position; 8 the spring which brings about the opening of the breaker whenever latch 1 is disengaged; 9, l0, H, l2 are the intermediate members for transmitting the movement between latch I and the insulating rod l3, which is actuated in order to open the switch of the operating solenoid l4; I5 indicates an insulating tube concentric with rod iii, in which flows the compressed air coming from the reservoir l6, whenever magnet I1 is actuated; l8 indicates a manually operated auxiliary pump for producing pressure in the reservoir before the closing of the breaker in the event that the supply of air from another source should fail: 19 indicates the insulating supportin body of the circuit breaker in which a transformer may be
  • Fig. 2 shows, at an enlarged scale, chamber or member 2
  • Fig. 3 shows the members operating and looking the movable contact.
  • the lower part of the movable contact plunger 3 actuates piston ,4, which slides into cylinder 5, and carries a stop ring 6 with which engages latch 1, which holds loaded the compressed opening spring 8.
  • the preceding one that is the circuit breaker has again an outer insulating sleeve 5
  • plunger 53 is .not directlyconnected to the operating links and levers, but at a certain intermediate point :same is replaced by a pantograph system 59 apt to multiply the stroke and speed of the upper end of plunger 53, in relation to the part connectedqto. the operating levers.
  • circuit breaker illustrated in Fig. 5 differs only little irom those considered before inascauses ring 6 to engage with latch I, thereby-lock ing the contacts in their closed position.
  • the stationary contact 62 is placed atuthe lower end instead of at the upper end, and above same the labyrinth explosion chamber ;is arranged throughwhichmovableplunger 63, passes guided and actuated by levers-61, -68,69
  • On the disks .co-nstituting the labyrinth chamber 64 areprothiscircuit breakeris similarto those previously considered and .has th-erefore the samenadvantages in addition to having -a -betterlg.uided operating rod.
  • an oil-immersed arc extinguishing member comprising in combination,- an elongated central boring having substantially the same diameter as the contact extending through said boring in thecl-osed-position of the breakerya first cavity in the member, said first cavity extending inafirst radial directionfrom said central boring and communicating therewith; :a second cavity in the member, said second cavity being arranged at a different level with respect to said boringzfrom the level'of said firstcavity and :extending in asecond radial direction'different from the first radial direction :from said central boring and communicating therewith; and a third cavity in the member, said third cavity being arranged at a different level with respect to said boring from the levels of said first and second cavities and extending in a third radial direction difierent from the first and second radial directions from said central borin and communicating therewith.
  • an oil-immersed are extinguishing member comprising in combination, an elongated central boring having substantially the same diameter as the contact extending through said boring in the closed position of the breaker; a plurality of substantially circular cavities communicating with the boring and arranged in the member eccentrically with respect to'said boring at difierent levels and in diirerent radial directions, respectively; and a substantially circular cavity having a larger diameter than each of said eccentrically arranged circular cavities and being centered with respect to said boring and communicating therewith, whereby said cavities form together with said central boring a labyrinth passage for the are which is subdivided into separate portions by said cavities.
  • an oil-immersed arc extinguishing member comprising in combination, an elongated central boring having substantially the same di ameter as the contact extending through said boring in the closed position of the breaker; a plurality of substantially circular cavities communicating with the boring and arranged in the member eccentrically with respect to said boring at difierent levels and in different radial directions, respectively; and two substantially circular cavities having a larger diameter than each of said eccentrically arranged circular cavities and being centered with respect to said boring and communicating therewith, said centered cavities being arranged, respectively, below the level of the lowest and above the level of the highest of said eccentrically arranged circular cavities, whereby said cavities form together with said central boring a labyrinth passage for the are which is subdivided into separate portions by said cavities.
  • an oil-immersed arc extinguishing member comprising in combination, an elongated central boring having substantially the same diameter as the contact extending through said boring in the closed position of the breaker; a plurality of substantially circular cavities communicating with the boring and arranged in the member eccentrically with respect to said boring at different levels and in different radial directions, respectively; a substantially circular cavity having a larger diameter than each of said eccentrically arranged circular cavities and being centered with respect to said boring and communicating therewith, whereby said cavities form together with said central boring a labyrinth passage for the are which is subdivided into separate portions by said cavities; and a cylindrical extension forming part of the member and being arranged at the end of said boring near said centered cavity.
  • an oil-immersed arc extinguishing member comprising in combination, an elongated central boring having substantially the same diameter as the contact extending through said boring in the closed position of the breaker; a plurality of substantially circular cavities communicating with the boring and arranged in the member eccentrically with respect to said boring at dififerent levels and in different radial dir-ec tions, respectively; two substantially circular cavities having a larger diameter than each of said eccentrically arranged circular cavities and being centered with respect to said boring and communicating therewith, said centered cavities being arranged, respectively, below the level of the lowest and above the level of the highest of said eccentrically arranged circular cavities; and a cylindrical extension forming part of the member and being arranged at the end of said boring near said centered cavity arranged below the level of the lowest of said eccentrically arranged circular cavities, whereby said cavities form together with said central boring a labyrinth passage for the are which is subdivided into separate portions by said cavities.

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  • Circuit Breakers (AREA)
US723607A 1946-01-21 1947-01-22 Oil circuit breaker Expired - Lifetime US2566095A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT620371X 1946-01-21

Publications (1)

Publication Number Publication Date
US2566095A true US2566095A (en) 1951-08-28

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US723607A Expired - Lifetime US2566095A (en) 1946-01-21 1947-01-22 Oil circuit breaker

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US (1) US2566095A (xx)
BE (1) BE470474A (xx)
FR (1) FR942925A (xx)
GB (1) GB620371A (xx)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2737556A (en) * 1951-04-27 1956-03-06 Westinghouse Electric Corp Circuit interrupter
US2777920A (en) * 1953-07-14 1957-01-15 Coq Nv Electric switching devices for high tension
US2789186A (en) * 1955-05-31 1957-04-16 Gen Electric Electric circuit breaker
US2886673A (en) * 1956-02-02 1959-05-12 Mc Graw Edison Co Arc extinguishing chamber
US2909633A (en) * 1957-02-11 1959-10-20 Donald M Umphrey High tension oil switch
DE1229625B (de) * 1963-08-30 1966-12-01 Siemens Ag Loesbare Verklinkung zum Halten des beweglichen Schaltstueckes eines Leistungsschalters

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2625619A (en) * 1948-08-07 1953-01-13 Mcgraw Electric Co Transformer tap changer
DE1150737B (de) * 1957-03-29 1963-06-27 Siemens Ag Fluessigkeitsschalter

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1067735A (en) * 1910-07-15 1913-07-15 Gen Electric Electric switch.
US1899612A (en) * 1930-04-04 1933-02-28 Westinghouse Electric & Mfg Co Circuit interrupter
US1934454A (en) * 1932-04-13 1933-11-07 Gen Electric Oil blast circuit breaker
US1981709A (en) * 1930-11-26 1934-11-20 Westinghouse Electric & Mfg Co Circuit breaker
US1988120A (en) * 1932-03-23 1935-01-15 Ohio Brass Co Disconnecting switch
US2022241A (en) * 1932-06-02 1935-11-26 Bbc Brown Boveri & Cie Circuit interrupting device
US2106032A (en) * 1934-12-10 1938-01-18 Lange Emil Arc rupturing device for electric switches
US2109685A (en) * 1935-09-03 1938-03-01 Allis Chalmers Mfg Co Circuit breaker
US2145706A (en) * 1937-01-05 1939-01-31 Gen Electric Electric circuit interrupter
US2315618A (en) * 1941-11-26 1943-04-06 Westinghouse Electric & Mfg Co Circuit interrupter
US2342809A (en) * 1942-03-31 1944-02-29 Westinghouse Electric & Mfg Co Compressed air circuit breaker

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1067735A (en) * 1910-07-15 1913-07-15 Gen Electric Electric switch.
US1899612A (en) * 1930-04-04 1933-02-28 Westinghouse Electric & Mfg Co Circuit interrupter
US1981709A (en) * 1930-11-26 1934-11-20 Westinghouse Electric & Mfg Co Circuit breaker
US1988120A (en) * 1932-03-23 1935-01-15 Ohio Brass Co Disconnecting switch
US1934454A (en) * 1932-04-13 1933-11-07 Gen Electric Oil blast circuit breaker
US2022241A (en) * 1932-06-02 1935-11-26 Bbc Brown Boveri & Cie Circuit interrupting device
US2106032A (en) * 1934-12-10 1938-01-18 Lange Emil Arc rupturing device for electric switches
US2109685A (en) * 1935-09-03 1938-03-01 Allis Chalmers Mfg Co Circuit breaker
US2145706A (en) * 1937-01-05 1939-01-31 Gen Electric Electric circuit interrupter
US2315618A (en) * 1941-11-26 1943-04-06 Westinghouse Electric & Mfg Co Circuit interrupter
US2342809A (en) * 1942-03-31 1944-02-29 Westinghouse Electric & Mfg Co Compressed air circuit breaker

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2737556A (en) * 1951-04-27 1956-03-06 Westinghouse Electric Corp Circuit interrupter
US2777920A (en) * 1953-07-14 1957-01-15 Coq Nv Electric switching devices for high tension
US2789186A (en) * 1955-05-31 1957-04-16 Gen Electric Electric circuit breaker
US2886673A (en) * 1956-02-02 1959-05-12 Mc Graw Edison Co Arc extinguishing chamber
US2909633A (en) * 1957-02-11 1959-10-20 Donald M Umphrey High tension oil switch
DE1229625B (de) * 1963-08-30 1966-12-01 Siemens Ag Loesbare Verklinkung zum Halten des beweglichen Schaltstueckes eines Leistungsschalters

Also Published As

Publication number Publication date
BE470474A (xx)
GB620371A (en) 1949-03-23
FR942925A (fr) 1949-02-22

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