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US2441943A - Gas blast circuit breaker - Google Patents

Gas blast circuit breaker Download PDF

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Publication number
US2441943A
US2441943A US523111A US52311144A US2441943A US 2441943 A US2441943 A US 2441943A US 523111 A US523111 A US 523111A US 52311144 A US52311144 A US 52311144A US 2441943 A US2441943 A US 2441943A
Authority
US
United States
Prior art keywords
contacts
circuit breaker
electrode
gas blast
gas
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
US523111A
Other languages
English (en)
Inventor
Bruhlmann Gottfried
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.)
BBC Brown Boveri AG Germany
Original Assignee
Bbc Brown Boveri & Cie
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 Bbc Brown Boveri & Cie filed Critical Bbc Brown Boveri & Cie
Application granted granted Critical
Publication of US2441943A publication Critical patent/US2441943A/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
    • H01H33/04—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

Definitions

  • protective resistance which assists the extinction of the rupturing arc and prevents the rapid rise of the recovery voltage, is connected in parallel with the switch contacts by means of a spark gap. It has, however, been found that such switching devices can fail to operate when under certain circumstances difiiculties are encountered as regards the extinction of the are at the spark gap which connects up the resistanc or if over-voltages are caused by this arc.
  • the object of the present invention is therefore to overcome these difliculties.
  • Fig. 1 is a fragmentary longitudinal section through a gas-blast circuit breaker with a hollow contact, all elements which are not essential for an understanding of the invention having been omitted from the drawings;
  • Figs. 2 and 3 are fragmentary longitudinal sections showing alternative arrangements in which the auxiliary electrodes provide a spark gap extending transversely to the direction of the gas blast;
  • Fig. 4 is a fragmentary longitudinal section of a circuit breaker in which the auxiliary electrodes provide a plurality of spark gaps in parallel;
  • Fig. 5 is a diagrammatic top plan view of the same.
  • the hollow contact a is assumed to be stationary and together with the movable pin contact 1) forms a point of interruption where the opening arc, after the nozzle opening has been uncovered by the moving contact, is subjected to a gas blast in the longitudinal direction and thus rapidly deionized. Part of the are thus passes to the electrodes c1, 02 of the spark gap which connects the protective between the circuit breaker contacts a and b.
  • This introduction of a parallel resistance path facilitates the extinction of the arc by preventing a rapid rise of the recovery voltage during the resistance (11 in parallel with the initial arc path Application February 19, 1944, Serial No. 523,111
  • Resistance (12 of the additional spark gap can also be employed with gas-blast circuit breakers having contacts moved in opposite directions by the pressure gas as well as with such circuit breakers where both contacts are of the hollow type.
  • the arrangement according to the invention can furthermore be applied to gas-blast circuit breakers with an insulating nozzle inside which contacts are located, and to such circuit breakers where the arc burns transversely to the gas blast.
  • the number of spark gaps can be increased as desired, whereby the resistances of the even and odd number spark gaps can each be arranged in a series of their own.
  • the electrodes of the resistance-switching spark gaps are arranged one behind the other in the direction of the gas blast, it is also possible to locate them next to each other transversely to the direction of the gas blast, as shown in Figs. 2 to 4.
  • the resistances switched by the spark gaps c1, 02 and C11, (312 respectively can then be connected either both to the same contact b or each to one of the contacts a, b.
  • the hollow contact a can also be used as an electrode of the spark gap.
  • an electrode (:1 lying approximately in the centre of the gas blast can be connected over a resistance (11 with one of the switch contacts I), further electrodes C2-Cs connected to resistances dzds being grouped around the electrode 01 as shown in Figs. 4 and 5.
  • a hollow contact a contact movable to engage said hollow contact, a first electrode spaced from said hollow contact in a direction away from said movable contact and located substantially centrally in the path of the blast of the are drawn between said contacts, circuit means including a resistance interconnecting said first electrode and one of said contacts, whereby the are drawn between the contacts is shifted to the gap between said first electrode and the other of said contacts, at least one additional electrode spaced from said first electrode and located in the path of the arc blast, and circuit means including a resistance interconnecting said additional electrode and the said other contact whereby the arc is shifted to the gap between said first and additional electrodes.
  • a pair of relatively movable circuit breaker contacts, passage means for the flow of pressure gas to blast the are drawn between the contacts upon their separation, an electrode located beyond said contacts along the axis of the gas blast path, circuit means including a resistance connecting said electrode to one of said contacts, a plurality of additional electrodes arranged about the axis or the gas blast path to define a plurality of gaps with respect to said axially located electrode, and circuit means including resistances individual to each additional electrode connecting said. additional electrodes with the other of said contacts.

Landscapes

  • Circuit Breakers (AREA)
US523111A 1943-01-18 1944-02-19 Gas blast circuit breaker Expired - Lifetime US2441943A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH576345X 1943-01-18

Publications (1)

Publication Number Publication Date
US2441943A true US2441943A (en) 1948-05-18

Family

ID=4521230

Family Applications (1)

Application Number Title Priority Date Filing Date
US523111A Expired - Lifetime US2441943A (en) 1943-01-18 1944-02-19 Gas blast circuit breaker

Country Status (6)

Country Link
US (1) US2441943A (sv)
BE (1) BE453984A (sv)
CH (1) CH232445A (sv)
FR (1) FR902902A (sv)
GB (1) GB576345A (sv)
NL (1) NL114857C (sv)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2596254A (en) * 1945-03-08 1952-05-13 Latour Andre Compressed air switch with delayed break connector
US2643513A (en) * 1949-04-08 1953-06-30 Niles Bement Pond Co Internal-combustion engine fuel and speed control
US2749411A (en) * 1953-04-27 1956-06-05 Allis Chalmers Mfg Co Circuit breaker with electrode disposed between an interrupting device and a contactopening
US2786118A (en) * 1953-01-29 1957-03-19 Licentia Gmbh High voltage switch

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB755016A (en) * 1953-07-08 1956-08-15 Reyrolle A & Co Ltd Improvements relating to electric switchgear

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1967989A (en) * 1932-11-25 1934-07-24 Const Electriues De Delle Atel Blow-out chamber with insulating grids
USRE20044E (en) * 1931-02-09 1936-07-28 Electric circuit-breaker with
US2290004A (en) * 1936-07-30 1942-07-14 Bbc Brown Boveri & Cie Electric circuit breaker

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USRE20044E (en) * 1931-02-09 1936-07-28 Electric circuit-breaker with
US1967989A (en) * 1932-11-25 1934-07-24 Const Electriues De Delle Atel Blow-out chamber with insulating grids
US2290004A (en) * 1936-07-30 1942-07-14 Bbc Brown Boveri & Cie Electric circuit breaker

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2596254A (en) * 1945-03-08 1952-05-13 Latour Andre Compressed air switch with delayed break connector
US2643513A (en) * 1949-04-08 1953-06-30 Niles Bement Pond Co Internal-combustion engine fuel and speed control
US2786118A (en) * 1953-01-29 1957-03-19 Licentia Gmbh High voltage switch
US2749411A (en) * 1953-04-27 1956-06-05 Allis Chalmers Mfg Co Circuit breaker with electrode disposed between an interrupting device and a contactopening

Also Published As

Publication number Publication date
CH232445A (de) 1944-05-31
NL114857C (sv)
FR902902A (fr) 1945-09-17
BE453984A (sv)
GB576345A (en) 1946-03-29

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