GB812101A - Improvements in electric circuit breakers - Google Patents

Improvements in electric circuit breakers

Info

Publication number
GB812101A
GB812101A GB20321/57A GB2032157A GB812101A GB 812101 A GB812101 A GB 812101A GB 20321/57 A GB20321/57 A GB 20321/57A GB 2032157 A GB2032157 A GB 2032157A GB 812101 A GB812101 A GB 812101A
Authority
GB
United Kingdom
Prior art keywords
transmitter
pulse
contacts
circuit
main contacts
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
GB20321/57A
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.)
Forges et Ateliers de Constructions Electriques de Jeumont SA
Original Assignee
Forges et Ateliers de Constructions Electriques de Jeumont SA
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 Forges et Ateliers de Constructions Electriques de Jeumont SA filed Critical Forges et Ateliers de Constructions Electriques de Jeumont SA
Publication of GB812101A publication Critical patent/GB812101A/en
Expired legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23L—FOODS, FOODSTUFFS, OR NON-ALCOHOLIC BEVERAGES, NOT COVERED BY SUBCLASSES A21D OR A23B-A23J; THEIR PREPARATION OR TREATMENT, e.g. COOKING, MODIFICATION OF NUTRITIVE QUALITIES, PHYSICAL TREATMENT; PRESERVATION OF FOODS OR FOODSTUFFS, IN GENERAL
    • A23L2/00—Non-alcoholic beverages; Dry compositions or concentrates therefor; Their preparation
    • A23L2/02—Non-alcoholic beverages; Dry compositions or concentrates therefor; Their preparation containing fruit or vegetable juices
    • A23L2/04—Extraction of juices
    • A—HUMAN NECESSITIES
    • A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23L—FOODS, FOODSTUFFS, OR NON-ALCOHOLIC BEVERAGES, NOT COVERED BY SUBCLASSES A21D OR A23B-A23J; THEIR PREPARATION OR TREATMENT, e.g. COOKING, MODIFICATION OF NUTRITIVE QUALITIES, PHYSICAL TREATMENT; PRESERVATION OF FOODS OR FOODSTUFFS, IN GENERAL
    • A23L21/00—Marmalades, jams, jellies or the like; Products from apiculture; Preparation or treatment thereof
    • A23L21/10—Marmalades; Jams; Jellies; Other similar fruit or vegetable compositions; Simulated fruit products
    • A23L21/12—Marmalades; Jams; Jellies; Other similar fruit or vegetable compositions; Simulated fruit products derived from fruit or vegetable solids
    • 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
    • H01H33/59—Circuit arrangements not adapted to a particular application of the switch and not otherwise provided for, e.g. for ensuring operation of the switch at a predetermined point in the ac cycle
    • H01H33/593—Circuit arrangements not adapted to a particular application of the switch and not otherwise provided for, e.g. for ensuring operation of the switch at a predetermined point in the ac cycle for ensuring operation of the switch at a predetermined point of the ac cycle

Landscapes

  • Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Nutrition Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Food Science & Technology (AREA)
  • Polymers & Plastics (AREA)
  • Power Engineering (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)

Abstract

812,101. High-tension switches; arcing- preventing in switches; protective cut-out arrangements. FORGES ET ATELIERS DE CONSTRUCTIONS ELECTRIQUES DE JEUMONT. June 27, 1957 [June 28. 1956], No. 20321/57. Class 38 (5). An A.C. circuit-breaker with main contacts 3, 4 and parallel auxiliary contacts 5, 6 is provided with an impulse transmitter 8 synchronized with the current to be interrupted, the transmitter applying a first pulse to an operating circuit 11 to close the auxiliary contacts 5, 6 and then open the main contacts 3, 4 shortly before a current zero, and a second pulse to another operating circuit 12 to reopen the auxiliary contacts before this current zero, but after the opening of the main contacts. The second pulse may also effect the opening of a disconnecting switch 2, the main contacts then reclosing. The main contacts may be housed in an enclosure 22 filled with gas under pressure and the auxiliary contacts may operate under a high vacuum. The transmitter 8 may be controlled by a current transformer 7 or from a shunt in the controlled circuit 1, and may be arranged to produce the pulses only if the rate of increase of the current at the start of a half cycle has a predetermined sense and a value greater than a desired minimum, but less than a predetermined maximum. The transmitter 8 may also be controlled remotely by an hydraulic pulse generator 16 connected to the transmitter 8 through an oil-filled insulating pipe 17. The generator 16 is controlled by an " opening " button 18 and a closing button 19, the operation of the latter causing a pulse to be applied to a circuit 13 to effect the closing of the switch 2.
GB20321/57A 1956-06-28 1957-06-27 Improvements in electric circuit breakers Expired GB812101A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1152843T 1956-06-28

Publications (1)

Publication Number Publication Date
GB812101A true GB812101A (en) 1959-04-15

Family

ID=9648638

Family Applications (1)

Application Number Title Priority Date Filing Date
GB20321/57A Expired GB812101A (en) 1956-06-28 1957-06-27 Improvements in electric circuit breakers

Country Status (6)

Country Link
US (1) US2878402A (en)
CH (1) CH345375A (en)
DE (1) DE1069269B (en)
FR (1) FR1152843A (en)
GB (1) GB812101A (en)
NL (1) NL8386C (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3283179A (en) * 1963-09-17 1966-11-01 Vapor Corp Apparatus for and method of zero switching
US3243610A (en) * 1963-12-30 1966-03-29 Allis Chalmers Mfg Co Synchronous switching system
US3430016A (en) * 1966-04-15 1969-02-25 Gen Electric Electric current interrupting device
JPS58181218A (en) * 1982-04-19 1983-10-22 株式会社日立製作所 Composite vacuum breaker
US7904266B2 (en) * 2007-05-22 2011-03-08 Abb Technology Ag Method and apparatus for calculating the separation time of arcing contacts of a high-volume switchgear

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH123402A (en) * 1926-12-20 1927-11-16 Oerlikon Maschf High-speed switch suitable for selective protection.
CH157449A (en) * 1931-10-21 1932-09-30 Oerlikon Maschf Fast acting overcurrent switch.
GB637393A (en) * 1947-07-18 1950-05-17 Jan Forman Improvements in or relating to electrical circuit breakers and electrical circuit protection systems

Also Published As

Publication number Publication date
US2878402A (en) 1959-03-17
NL8386C (en)
DE1069269B (en) 1959-11-19
CH345375A (en) 1960-03-31
FR1152843A (en) 1958-02-26

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