US2599100A - Compressed air circuit breaker with a plurality of series connected breaking gaps - Google Patents

Compressed air circuit breaker with a plurality of series connected breaking gaps Download PDF

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Publication number
US2599100A
US2599100A US2913A US291348A US2599100A US 2599100 A US2599100 A US 2599100A US 2913 A US2913 A US 2913A US 291348 A US291348 A US 291348A US 2599100 A US2599100 A US 2599100A
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US
United States
Prior art keywords
gaps
circuit breaker
compressed air
operating
series connected
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
US2913A
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English (en)
Inventor
Forwald Haakon
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.)
ABB Norden Holding AB
Original Assignee
ASEA AB
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 ASEA AB filed Critical ASEA AB
Application granted granted Critical
Publication of US2599100A publication Critical patent/US2599100A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • H01H33/02—Details
    • H01H33/28—Power arrangements internal to the switch for operating the driving mechanism
    • H01H33/30—Power arrangements internal to the switch for operating the driving mechanism using fluid actuator
    • H01H33/32—Power arrangements internal to the switch for operating the driving mechanism using fluid actuator pneumatic
    • 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
    • H01H33/02—Details
    • H01H33/04—Means for extinguishing or preventing arc between current-carrying parts
    • H01H33/12—Auxiliary contacts on to which the arc is transferred from the main contacts
    • 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
    • H01H33/02—Details
    • H01H33/04—Means for extinguishing or preventing arc between current-carrying parts
    • H01H33/16—Impedances connected with contacts

Definitions

  • the breaking ability is increased by'providing the breakers with a plurality of breaking gaps; After breaking, the contacts or metallic members in contact with them are separated by air gaps under atmospheric pressure, and the creeping distance between these parts along the insulators carrying them must thus be dimensioned with respect to the voltage difference between-these'parts and the. insulating strength of the air under atmospheric pressure.
  • the present invention has for its object to provide a circuit breaker in which the outermost contacts of the series-comiected gaps are separated by a single insulating cylinder having an unbroken insulating external surface, the insulation between the contacts being efi'ected by air under pressure.
  • the movable contacts of the two breaking gaps are insulatingly carried within an insulating cylinder or within a space in communication with said cylinder, which space, after the interruption, remains filled with'air under pressure.
  • the insulating distance between the contacts can therefore be considerably smaller than if they were separated by air under'atmospheric pressure.
  • Fig. 1 shows the circuit breaker according to the invention with two series connected breaking gaps
  • Fig. 2 shows such a circuit breaker with four series connected breaking gaps.
  • the bottom casmg I of the circuit breaker contains the extinguishing air valve 2 for controlling the supply of extinguishing compressed air, andv also contains a three-way air valve 3 for the control of the operating air.
  • a compressed air container 4 which carries the disconnecting switch insulator 5, which at its upper end carries the stationary contact 6 of the disconnecting switch.
  • the other contact 1 of the disconnecting switch is pivoted in a support 8, attached to the metal casing I0, and is operated by the insulator 9, which serves as an operating shaft rotated by the operating mechanism of the breaker, which mechanism is not shown on the drawing.
  • the metal casing is carried by an insulator ll fastened to the bottom casing I, and the casing 10 in turn carries an insulating cylinder H, which is closed at its upper end by a cap I3,
  • the movable contacts H and I8 of the breaking gaps are of spherical form and are attached to rods I9 and 20 respectively, which rods are at theiropposite'ends attached to operating pistons 21" and'22 respectively, said pistons being move able in operating cylinders 23 and 24.
  • , 22' are provided with helical springs 25 and 26 respectively, which tend to press the movable contacts I'I, I8 against the corresponding stationary'contacts IS, IS respectively.
  • the operating cylinder 24 is, through a passage or port 21, in communication with the cylinder 23 for the purpose explained below.
  • the operating cylinder 24 is'also connected by a pipe line 2
  • an insulating tube 29 suitably made of an organic material, is provided, and this tube 29 is at its lower end closed by a perforated wall which serves as the support for the operating cylinders 23 and 24.
  • These cylinders may, of course, be mounted in some other suitable or convenient manner directly to the in sulating cylinder l2 or to the insulator ,and the essential feature is that they are insulated from the parts 10 and M.
  • the casing Ill may be attached to the insulating cylinder I 2 at a distance from itslower end, so that a part of this insulator projects into the casing Ill.
  • the said insulating tube 29 serves, on the one hand, to relieve the insulating cylinder I2 from the pressure exerted by the compressed air and the pressure generated by the arcs, but the same tube may, on the other band, also serve to carry a by-pass resistance 30, coupled in parallel with the contact gaps 15, ll.
  • the circuit breaker actuates in the following manner:
  • a compressed air circuitbreaker comprising: .a-,.pair Hot-series connected; breaking-gaps, a metal-.1 zcasing-ivan- :insulating cylinder: carried by said casing, insulating means supporting ,-,the casing; .a metal top: cap. on said cylinder; a metal member dependingfromsaid capithe stationary contact of one of said gaps being located. at the lowersend: of said jdependingpmemberwand the stationary'contact-of fthe.
  • a cempressed air contact breaker according to claim 1, comprising Operating pistons carrying two movable contacts, operating com- .pressedmair cylinders-for the pistons, and means wherebythe-pylindem are insulated from the said casing- 3.
  • a compressed air contact breaker according -toclaiml, in the insulating cylinder has oneendsecured to said casing and its opposite end carrying'thejsaid depending member and the first stationary contact.

Landscapes

  • Circuit Breakers (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
  • Percussive Tools And Related Accessories (AREA)
US2913A 1942-05-29 1948-01-17 Compressed air circuit breaker with a plurality of series connected breaking gaps Expired - Lifetime US2599100A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE238219X 1942-05-29
SE591682X 1944-05-11

Publications (1)

Publication Number Publication Date
US2599100A true US2599100A (en) 1952-06-03

Family

ID=26656155

Family Applications (2)

Application Number Title Priority Date Filing Date
US2920A Expired - Lifetime US2536270A (en) 1942-05-29 1948-01-17 Fluid pressure operated circuit breaker
US2913A Expired - Lifetime US2599100A (en) 1942-05-29 1948-01-17 Compressed air circuit breaker with a plurality of series connected breaking gaps

Family Applications Before (1)

Application Number Title Priority Date Filing Date
US2920A Expired - Lifetime US2536270A (en) 1942-05-29 1948-01-17 Fluid pressure operated circuit breaker

Country Status (6)

Country Link
US (2) US2536270A (fr)
BE (2) BE450850A (fr)
CH (2) CH238219A (fr)
DE (1) DE894584C (fr)
FR (2) FR896391A (fr)
GB (2) GB564949A (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2824196A (en) * 1955-02-16 1958-02-18 Bbc Brown Boveri & Cie Gas-blast circuit breaker with multiple break
US2970198A (en) * 1957-02-18 1961-01-31 Westinghouse Electric Corp Compressed-gas circuit interrupter
US2997563A (en) * 1955-05-27 1961-08-22 Westinghouse Canada Ltd Circuit interrupters
US3154656A (en) * 1957-12-23 1964-10-27 S & C Electric Co Circuit interrupter provided with main and auxiliary contacts in parallel sequentially operable to open the circuit first at the main contacts followed by the auxiliary contacts
US3172980A (en) * 1959-06-13 1965-03-09 Bbc Brown Boveri & Cie Compressed air switch with multiple interruption

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1033758B (de) * 1951-02-09 1958-07-10 Voigt & Haeffner Ag Druckgasschalter
DE1020397B (de) * 1954-06-04 1957-12-05 Asea Ab Mehrphasiger Druckluftschalter

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1904577A (en) * 1930-04-04 1933-04-18 Gen Electric Gas blast circuit interrupter
US1965551A (en) * 1931-07-06 1934-07-03 Bbc Brown Boveri & Cie Electric circuit breaker
US2240233A (en) * 1938-05-27 1941-04-29 Bbc Brown Boveri & Cie Gas blast circuit breaker
US2303825A (en) * 1941-09-18 1942-12-01 Gen Electric Electric circuit breaker
US2331441A (en) * 1938-05-27 1943-10-12 Bbc Brown Boveri & Cie Electric switching arrangement
US2394086A (en) * 1942-02-18 1946-02-05 Westinghouse Electric Corp Circuit interrupter

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2365134A (en) * 1940-04-15 1944-12-12 Amer Donald Foster Electric circuit breaker of the gas-blast type
US2351903A (en) * 1942-04-07 1944-06-20 Westinghouse Electric & Mfg Co Circuit interrupter
GB561078A (en) * 1942-07-30 1944-05-04 Cedric Harold Flurscheim Improvements in air or gas blast electric switches

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1904577A (en) * 1930-04-04 1933-04-18 Gen Electric Gas blast circuit interrupter
US1965551A (en) * 1931-07-06 1934-07-03 Bbc Brown Boveri & Cie Electric circuit breaker
US2240233A (en) * 1938-05-27 1941-04-29 Bbc Brown Boveri & Cie Gas blast circuit breaker
US2331441A (en) * 1938-05-27 1943-10-12 Bbc Brown Boveri & Cie Electric switching arrangement
US2303825A (en) * 1941-09-18 1942-12-01 Gen Electric Electric circuit breaker
US2394086A (en) * 1942-02-18 1946-02-05 Westinghouse Electric Corp Circuit interrupter

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2824196A (en) * 1955-02-16 1958-02-18 Bbc Brown Boveri & Cie Gas-blast circuit breaker with multiple break
US2997563A (en) * 1955-05-27 1961-08-22 Westinghouse Canada Ltd Circuit interrupters
US2970198A (en) * 1957-02-18 1961-01-31 Westinghouse Electric Corp Compressed-gas circuit interrupter
US3154656A (en) * 1957-12-23 1964-10-27 S & C Electric Co Circuit interrupter provided with main and auxiliary contacts in parallel sequentially operable to open the circuit first at the main contacts followed by the auxiliary contacts
US3172980A (en) * 1959-06-13 1965-03-09 Bbc Brown Boveri & Cie Compressed air switch with multiple interruption

Also Published As

Publication number Publication date
CH245906A (de) 1946-11-30
GB564949A (en) 1944-10-19
BE458962A (fr)
DE894584C (de) 1953-10-26
CH238219A (de) 1945-06-30
BE450850A (fr) 1943-06-30
US2536270A (en) 1951-01-02
GB591682A (en) 1947-08-26
FR896391A (fr) 1945-02-20
FR912626A (fr) 1946-08-14

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