GB826463A - Improvements in electric circuit breakers of the air- or gas-blast type - Google Patents

Improvements in electric circuit breakers of the air- or gas-blast type

Info

Publication number
GB826463A
GB826463A GB5481/55A GB548155A GB826463A GB 826463 A GB826463 A GB 826463A GB 5481/55 A GB5481/55 A GB 5481/55A GB 548155 A GB548155 A GB 548155A GB 826463 A GB826463 A GB 826463A
Authority
GB
United Kingdom
Prior art keywords
chamber
gas
air
pressure
pipe
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
Application number
GB5481/55A
Inventor
Albert Roxburgh
Albert Leigh
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.)
British Thomson Houston Co Ltd
Original Assignee
British Thomson Houston Co Ltd
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 British Thomson Houston Co Ltd filed Critical British Thomson Houston Co Ltd
Priority to ES0226872A priority Critical patent/ES226872A1/en
Publication of GB826463A publication Critical patent/GB826463A/en
Expired legal-status Critical Current

Links

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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
    • B66F9/00—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes
    • B66F9/06—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes movable, with their loads, on wheels or the like, e.g. fork-lift trucks
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G59/00—Polycondensates containing more than one epoxy group per molecule; Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups
    • C08G59/14—Polycondensates modified by chemical after-treatment
    • C08G59/1433—Polycondensates modified by chemical after-treatment with organic low-molecular-weight compounds
    • C08G59/1438—Polycondensates modified by chemical after-treatment with organic low-molecular-weight compounds containing oxygen
    • C08G59/1455—Monocarboxylic acids, anhydrides, halides, or low-molecular-weight esters thereof
    • C08G59/1461—Unsaturated monoacids
    • C08G59/1472—Fatty acids
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L63/00—Compositions of epoxy resins; Compositions of derivatives of epoxy resins
    • C08L63/10—Epoxy resins modified by unsaturated compounds
    • 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
    • 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
    • H01H33/164—Impedances connected with contacts the impedance being inserted in the circuit by blowing the arc onto an auxiliary electrode

Landscapes

  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Transportation (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Structural Engineering (AREA)
  • Civil Engineering (AREA)
  • General Chemical & Material Sciences (AREA)
  • Emergency Medicine (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Mechanical Engineering (AREA)
  • Circuit Breakers (AREA)
  • Epoxy Resins (AREA)

Abstract

826,463. Gas-blast switches. BRITISH THOMSON-HOUSTON CO. Ltd. Feb. 16, 1956 [Feb. 23, 1955; Nov. 10, 1955], Nos. 5481/55 and 32221/55. Class 38 (5). In an air or gas blast circuit-breaker having a resistance 28 connected by means of a series gap in parallel with the circuit interrupting contacts 11, 14, a chamber 34, within which the electrodes 31, 32 are positioned, is subject to a reduction in pressure in response to the flow of air or gas during opening of the contacts 11, 14 to facilitate breakdown of the series gap. The arrangement shown is that of Specification 762,988 with the addition of an ejector 102 having an inlet port connected by a pipe 100 to the chamber 34, a venturi 103 connected by a pipe 104 to the contact chamber 1 and a discharge port 106 connected by a pipe 107 to the main discharge passage 21 of the circuit-breaker. When the pressure air or gas is applied to the chamber 1 to open the contacts 11, 14, the pressure air or gas flows through the ejector and entrains air from the chamber 34 to reduce the pressure in the chamber 34 substantially below atmospheric pressure to facilitate the breakdown of the gap. When the flow of the blast gas ceases due to an exhaust valve piston 23 closing ports 22 as described in the Specification referred to above, the pressure in the chamber 1 is applied to the chamber 34 to increase the dielectric strength and facilitate interruption of the resistor current. In an alternative construction, Fig. 2 (not shown), the pipe 100 is connected to a double venturi arrangement disposed in the main discharge passage 21. Fig. 1 (Complete) (not shown) illustrates a construction in which the piston 23 is omitted and the chamber 34 is connected to the passage 21 at a throat of Venturi form.
GB5481/55A 1954-11-24 1955-02-23 Improvements in electric circuit breakers of the air- or gas-blast type Expired GB826463A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
ES0226872A ES226872A1 (en) 1955-02-23 1956-02-22 An electrical circuit switch. (Machine-translation by Google Translate, not legally binding)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
GB338605X 1954-11-24
GB341875X 1955-02-23
GB101155X 1955-11-10
GB111155X 1955-11-11

Publications (1)

Publication Number Publication Date
GB826463A true GB826463A (en) 1960-01-06

Family

ID=27448036

Family Applications (2)

Application Number Title Priority Date Filing Date
GB34057/54A Expired GB824103A (en) 1954-11-24 1954-11-24 Improvements in or relating to the manufacture of copolymers of epoxide resin esters
GB5481/55A Expired GB826463A (en) 1954-11-24 1955-02-23 Improvements in electric circuit breakers of the air- or gas-blast type

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB34057/54A Expired GB824103A (en) 1954-11-24 1954-11-24 Improvements in or relating to the manufacture of copolymers of epoxide resin esters

Country Status (7)

Country Link
US (1) US2833896A (en)
BE (2) BE543067A (en)
CH (2) CH338605A (en)
DE (2) DE1052117B (en)
FR (2) FR1140438A (en)
GB (2) GB824103A (en)
NL (1) NL100927C (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1163940B (en) * 1960-02-25 1964-02-27 Asea Ab Compressed air switch with a series-connected separation point in one bushing
DE1191015B (en) * 1961-06-26 1965-04-15 Asea Ab Compressed air switch with damping resistor
DE1215240B (en) * 1962-08-30 1966-04-28 Bbc Brown Boveri & Cie Compressed gas switch with multiple interruption
DE1221332B (en) * 1964-08-21 1966-07-21 Bbc Brown Boveri & Cie Gas pressure switch
DE1291404B (en) * 1964-10-05 1969-03-27 Gen Electric High-voltage switch with two load isolating sections and auxiliary switching sections parallel to them

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3087035A (en) * 1959-03-20 1963-04-23 Asea Ab Fluid operated circuit breaker
US3114815A (en) * 1959-11-18 1963-12-17 Westinghouse Electric Corp Fluid-blast circuit interrupter with improved current-transformer housing means
US3500009A (en) * 1967-02-24 1970-03-10 Gen Electric High voltage circuit breaker with means for preinserting resistors during closing
GB1257603A (en) * 1970-02-24 1971-12-22

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB561178A (en) * 1942-07-30 1944-05-09 Cedric Harold Flurscheim Improvements in air or gas blast electric switches
NL62332C (en) * 1943-09-11
FR912902A (en) * 1945-03-08 1946-08-23 Merlin Gerin Compressed gas switch with delayed cut connector
CH276833A (en) * 1947-05-15 1951-07-31 Usines Tchecoslovaques Metallu Compressed air switch with disconnector.
NL73206C (en) * 1948-07-23
BE506351A (en) * 1950-10-13
US2665351A (en) * 1951-02-09 1954-01-05 Asea Ab Arrangement in air blast circuit breaker provided with damping resistance
DE1050857B (en) * 1954-03-02 1959-02-19

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1163940B (en) * 1960-02-25 1964-02-27 Asea Ab Compressed air switch with a series-connected separation point in one bushing
DE1191015B (en) * 1961-06-26 1965-04-15 Asea Ab Compressed air switch with damping resistor
DE1215240B (en) * 1962-08-30 1966-04-28 Bbc Brown Boveri & Cie Compressed gas switch with multiple interruption
DE1221332B (en) * 1964-08-21 1966-07-21 Bbc Brown Boveri & Cie Gas pressure switch
DE1291404B (en) * 1964-10-05 1969-03-27 Gen Electric High-voltage switch with two load isolating sections and auxiliary switching sections parallel to them

Also Published As

Publication number Publication date
CH341875A (en) 1959-10-31
NL100927C (en) 1962-04-16
BE543067A (en) 1955-12-15
DE1025485B (en) 1958-03-06
FR1140438A (en) 1957-07-22
DE1052117B (en) 1959-03-05
CH338605A (en) 1959-05-31
GB824103A (en) 1959-11-25
FR1146202A (en) 1957-11-07
NL204840A (en) 1961-11-15
US2833896A (en) 1958-05-06
BE545466A (en) 1956-03-15

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