US1987569A - Electric circuit breaker - Google Patents

Electric circuit breaker Download PDF

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Publication number
US1987569A
US1987569A US683351A US68335133A US1987569A US 1987569 A US1987569 A US 1987569A US 683351 A US683351 A US 683351A US 68335133 A US68335133 A US 68335133A US 1987569 A US1987569 A US 1987569A
Authority
US
United States
Prior art keywords
chamber
electric circuit
contact
circuit breaker
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
US683351A
Other languages
English (en)
Inventor
Bresson Charles
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.)
Ateliers de Constructions Electriques de Delle SA
Original Assignee
Individual
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 Individual filed Critical Individual
Application granted granted Critical
Publication of US1987569A publication Critical patent/US1987569A/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
    • H01H33/70—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

  • Electric circuit-breakers are known in which the are is drawn out by displacement oi the movable contact in a chamber filled with a liquid, the stationary contact being located in said liquid 5 outside said chamber near an orifice in the latter, said orifice constituting a e for the movable contact as well as a nozzle for the partial escape of the contents oi the chamber subjected to pressure through the influence oi the arc.
  • the stationary contact being located in said liquid 5 outside said chamber near an orifice in the latter, said orifice constituting a e for the movable contact as well as a nozzle for the partial escape of the contents oi the chamber subjected to pressure through the influence oi the arc.
  • the opstation 01' this circuit-breaker is improved by increasing the height of the chamber which, in accordance with the invention, should be at least equal to oi'the maximum separation oi fire Bythe expression height oi the chamber" must be understood the mean distance separating the narrowest zones of the two orifices through which passes the. movable contact. 5
  • the invention and its aims and objects will be readily understood from the following description taken in connection with the accom tic drawing or one illustrative embodiment of the invention.
  • the chamber is terminated i at top and bottom bynozzles 4 and 5 through which passes the movable contactshown in chaindotted lines in closed position.
  • the nomle 5 is larger than the diameter of the contact 3 so as to enable the gases developed by the arc to escape v through this nozzle during'the displacement of the contact within the chamber 1.
  • the lateral walls of the chamber may be provided with orifices 6'. The whole is disposed within a vesel 7 containing the liquid.
  • the operation of the circuit-breaker is as follows: on opening the circuit-breaker the contact 3 is lowered to the position in which it is shown in the drawing, and, as a consequence, the arc ck between 2 and 3 is drawn into the'chamber in which it vaporizes a part of the contained liquid. This vaporization creates a rise in pressure which provokes the expulsion of liquid and gases through the nozzles 3 or 4. on emerging from the nozzles these jets spread out, expand and are cooled. 0n the first passage of the current through zero-a regenerated medium is thus 6 created between the two contacts and as a result the striking voltage between the latter attains a high value and restriking oi the arc is prevented. This eflect even takes place when the pressure is only 01' the order of a few atmosl0 pheres.
  • the invention is inno way limited to the vertical displacement of the movable contact and that the latter may move away from the stationary contact in any other direction whatsoever.
  • the lower contact may be stationary and disposed below the chamber whilst the upper ⁇ c ontact will consequently be movable.
  • a 1 In an electric circuit-breaker, an upper and a lower contact, said contacts being relatively movable and disposed in a liquid contained in a vessel, a chamber with upper and lower openings disposed within said vessel, the diameter or said openings being greater than that of said lower contact, said lower contact in closed position of the circuit-breaker traversing said chamber through the two openings and leaving said chamher by the lower opening; the height of said chamber being at least equal to of the maximum separation of the two said contacts.

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  • Circuit Breakers (AREA)
US683351A 1932-08-02 1933-08-02 Electric circuit breaker Expired - Lifetime US1987569A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEA66745D DE628337C (de) 1932-08-02 1932-08-02 Elektrischer Schalter zur Stromunterbrechung in Fluessigkeit

Publications (1)

Publication Number Publication Date
US1987569A true US1987569A (en) 1935-01-08

Family

ID=25964570

Family Applications (1)

Application Number Title Priority Date Filing Date
US683351A Expired - Lifetime US1987569A (en) 1932-08-02 1933-08-02 Electric circuit breaker

Country Status (4)

Country Link
US (1) US1987569A (de)
BE (1) BE397912A (de)
DE (1) DE628337C (de)
FR (1) FR761571A (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE441391A (de) * 1939-07-27

Also Published As

Publication number Publication date
DE628337C (de) 1936-04-03
BE397912A (de) 1933-08-31
FR761571A (fr) 1934-03-22

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