US2451669A - Gas blast circuit breaker - Google Patents

Gas blast circuit breaker Download PDF

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Publication number
US2451669A
US2451669A US2451669DA US2451669A US 2451669 A US2451669 A US 2451669A US 2451669D A US2451669D A US 2451669DA US 2451669 A US2451669 A US 2451669A
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US
United States
Prior art keywords
probes
arc
circuit breaker
blast
chamber
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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
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English (en)
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Publication of US2451669A publication Critical patent/US2451669A/en
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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
    • H01H9/34—Stationary parts for restricting or subdividing the arc, e.g. barrier plate
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
    • H01H9/34—Stationary parts for restricting or subdividing the arc, e.g. barrier plate
    • H01H9/341—Barrier plates carrying electrodes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J29/00—Details of cathode-ray tubes or of electron-beam tubes of the types covered by group H01J31/00
    • H01J29/86—Vessels; Containers; Vacuum locks
    • H01J29/87—Arrangements for preventing or limiting effects of implosion of vessels or containers

Definitions

  • Switching devices usually employed for interrupting alternating current cannot generally be used for the interruption of direct current, because with direct current the current and voltage are substantially constant and do not pass through zero values, a phenomenon which in the case of an alternating current can be utilized in a favourable manner.
  • a direct current is certain to be interrupted it is necessary that the arc should be so long that the voltage drop in the arc is greater than the driving electromotive force in the circuit.
  • Switching devices are known where the rupturing arc is lengthened by locating transverse walls of metal or insulating material in the path of the are so that the arc can establish itself along the edges of these walls in a wave-like manner.
  • Fig. l is a central vertical section of one form of the invention.
  • Fig. 3 is a transverse section taken on lines 8-! of Fig. 2;
  • Fig. 5 is a transverse section taken on lines 5-5 of Fig. 4;
  • Fig. 6 is a central vertical section of yet another modification of the invention.
  • a2 designate the switch contacts which are either both stationary and are bridged over by a movable contact element b, as
  • the blast chamber which has a rectangular section is fitted with two walls g1, 92 which are arranged transversely to the path of the arc.
  • Metal bolts hi to he and hll to h18 respectively are inserted at intervals one above the other in these transverse walls, so that the probes in both walls are located opposite to each .other at the same height.
  • the rupturing arc When a direct current is interrupted the rupturing arc is blown by the pressure gas from the main contact; oi, as to the auxiliary contacts c1, c2. Whilst the root points of the arc continue to adhere to the auxiliary contacts, the arc loop is driven in stages upwards over the pairs of opposing probes, whereby the arc wanders along the lateral spaces between the walls g1, g2 and the wall of the chamber thus forming a closed loop over the probes and is extinguished when it is sufllciently extended.
  • Walls g1, 92 together with the probes can be arranged parallel as shown, or they can be made to diverge in the direction menace 3 of flow of the pressure gas whereby the extinction 01' the arc is assisted. The same purpose is achieved if the probes of both walls gr, 9: are connected over resistances as indicated by the broken lines in Fig. 1.
  • Figs. 4 and 5 show a constructional example where two concentric insulating tubes 921, on: are located within the circular blast chamber d.
  • This circuit breaker has a fixed hollow contact a1 and a movable contact or.
  • Metal rings her to has and hn to has, which are located in the cylindrical surfaces of the insulating cylinders gm, can, serve as probes.
  • the operation of the circuit breaker is fundamentally the same as that shown in Fig 1.
  • Fig. 6 In order to reduce the dimensions of the blast chamber, which with high voltages has a correspondingly great length, it is possible as is shown in Fig. 6 for instance, to arrange transverse walls in, kg inside the blast chamber d, metallic coatings m1, me being provided on the lower ends of these walls, so that the blast chamber is subdivided into three part chamber which are electrically in series.
  • Each part chamber (11, (is, da contains two transverse walls of the same design which serve as special supports for the probes and are of the kind described in connection with Fig. 1.
  • the eflect of this arrangement is again the same as that described for the constructional example shown in Fig. 1, with the additional advantage. however, that not only is the length of the chamber reduced for high voltages but the extension of the arc is accelerated and the extinguishing effect improved.
  • Gas blast circuit breaker comprising switch contacts; a pair of auxiliary contacts constructed and arranged to catch and hold root points of the are formed upon opening of said switch contacts, a blast chamber disposed crosswise of the path 0! the are, said chamber being subdivided longitudinally by interior wall means into three compartments through which blast gas is adapted to flow, and said auxiliary contacts being located respectively at the entrance to the outer two of said compartments, a plurality of spaced probes arranged one above the otherv in each of the said outer two compartments, and similarly spaced probes in the middle compartment individual to and electrically connected with each of the probes in said outer compartments, said spaced probes forming successive points of attachment for the are intermediate the root points thereof upwardly through the blast chamber as the arc is lengthened by the blowing action of the blast gas.
  • Circuit breaker as in claim 1 characterized by the feature that said probes are supported by the wall means which subdivide the blast chamber.
  • Circuit breaker as in claim 1 characterized by the feature that said interior wall means coniprises at least two spaced walls and said probes are metal bolts arranged at intervals one above the other and extend through the respective walls.
  • circuit breaker as in claim 1 characterized by the feature that said interior wall means comprises at least one main interior insulating wall initially dividing said chamber into longitudinal sections, the lower end of said wall being provided with an electrode, and that each chamber section is subdivided longitudinally by secondary interior walls into at least three compartments and on which said probes are supported.
  • Circuit breaker as in claim 1 characterized by the feature that the blast chamber is circular and that said interior wall means comprises an insulating tube built into the blast chamber by means of webs which subdivide the annular space between said tube and the internal wall of said blast chamber, and that said probes are located diametrically opposite each other in said tube in such a manner that their connecting line runs perpendicularly to said webs.
  • Circuit breaker as in claim 1 characterized by the feature that the blast chamber is circular and said interior wall means comprises at least two concentrically arranged insulating tubes that support said probes.
  • Circuit breaker as in claim 1 characterized by the feature that the blast chamber is circular, and said interior wall means comprises at least two concentrically arranged insulating tubes, and that said probes are metallic rings located in the cylindrical surface of each insulating tube.

Landscapes

  • Circuit Breakers (AREA)
  • Arc-Extinguishing Devices That Are Switches (AREA)
US2451669D 1946-04-23 1945-03-27 Gas blast circuit breaker Expired - Lifetime US2451669A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH634796X 1946-04-23

Publications (1)

Publication Number Publication Date
US2451669A true US2451669A (en) 1948-10-19

Family

ID=4525022

Family Applications (2)

Application Number Title Priority Date Filing Date
US2451669D Expired - Lifetime US2451669A (en) 1946-04-23 1945-03-27 Gas blast circuit breaker
US747703A Expired - Lifetime US2469459A (en) 1946-04-23 1947-05-13 Gas blast circuit breaker

Family Applications After (1)

Application Number Title Priority Date Filing Date
US747703A Expired - Lifetime US2469459A (en) 1946-04-23 1947-05-13 Gas blast circuit breaker

Country Status (7)

Country Link
US (2) US2451669A (xx)
BE (2) BE459531A (xx)
CH (2) CH245189A (xx)
DE (2) DE839670C (xx)
FR (2) FR913540A (xx)
GB (1) GB634796A (xx)
NL (2) NL62333C (xx)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2590602A (en) * 1947-09-27 1952-03-25 Westinghouse Electric Corp Circuit interrupter
US2606982A (en) * 1949-06-11 1952-08-12 Allis Chalmers Mfg Co Arc chute defining two alternate arc paths
US2629798A (en) * 1948-10-30 1953-02-24 Allis Chalmers Mfg Co Cross air blast circuit breaker
US2639353A (en) * 1950-01-24 1953-05-19 Allis Chalmers Mfg Co Circuit breaker with arc chute short circuiting sections of the arc
US2645695A (en) * 1949-02-23 1953-07-14 Allis Chalmers Mfg Co Electric circuit breaker with arcing contacts in skew blast
US2645694A (en) * 1949-02-15 1953-07-14 Allis Chalmers Mfg Co Cross blast circuit breaker with arcing contacts controlling orifice of arcing chamber
US2648742A (en) * 1949-09-14 1953-08-11 Ite Circuit Breaker Ltd Arc chute plate
US4568805A (en) * 1984-08-24 1986-02-04 Eaton Corporation J-Plate arc interruption chamber for electric switching devices

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2761935A (en) * 1952-07-30 1956-09-04 David C Prince Circuit breaker
DE1069737B (xx) * 1952-12-23 1959-11-26
FR2615601B1 (fr) * 1987-05-22 1989-11-10 Faiveley Ets Dispositif et procede pour produire du froid et/ou de la chaleur par reaction solide-gaz

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2590602A (en) * 1947-09-27 1952-03-25 Westinghouse Electric Corp Circuit interrupter
US2629798A (en) * 1948-10-30 1953-02-24 Allis Chalmers Mfg Co Cross air blast circuit breaker
US2645694A (en) * 1949-02-15 1953-07-14 Allis Chalmers Mfg Co Cross blast circuit breaker with arcing contacts controlling orifice of arcing chamber
US2645695A (en) * 1949-02-23 1953-07-14 Allis Chalmers Mfg Co Electric circuit breaker with arcing contacts in skew blast
US2606982A (en) * 1949-06-11 1952-08-12 Allis Chalmers Mfg Co Arc chute defining two alternate arc paths
US2648742A (en) * 1949-09-14 1953-08-11 Ite Circuit Breaker Ltd Arc chute plate
US2639353A (en) * 1950-01-24 1953-05-19 Allis Chalmers Mfg Co Circuit breaker with arc chute short circuiting sections of the arc
US4568805A (en) * 1984-08-24 1986-02-04 Eaton Corporation J-Plate arc interruption chamber for electric switching devices

Also Published As

Publication number Publication date
NL68773C (xx) 1951-10-15
FR913540A (fr) 1946-09-12
GB634796A (en) 1950-03-29
DE850311C (de) 1952-09-22
DE839670C (de) 1952-05-23
BE459531A (xx) 1945-09-29
NL62333C (xx) 1949-01-15
BE472737A (xx)
CH252957A (de) 1948-01-31
CH245189A (de) 1946-10-31
US2469459A (en) 1949-05-10
FR56768E (fr) 1952-10-06

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