US2056033A - Electric circuit interrupter - Google Patents

Electric circuit interrupter Download PDF

Info

Publication number
US2056033A
US2056033A US53074A US5307435A US2056033A US 2056033 A US2056033 A US 2056033A US 53074 A US53074 A US 53074A US 5307435 A US5307435 A US 5307435A US 2056033 A US2056033 A US 2056033A
Authority
US
United States
Prior art keywords
chamber
pressure
arc
rod
circuit interrupter
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
US53074A
Other languages
English (en)
Inventor
Biermanns Josef
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.)
General Electric Co
Original Assignee
General Electric Co
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 General Electric Co filed Critical General Electric Co
Application granted granted Critical
Publication of US2056033A publication Critical patent/US2056033A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • H01H33/76—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid wherein arc-extinguishing gas is evolved from stationary parts; Selection of material therefor

Definitions

  • My invention relates Vto electric circuit interrupters, more particularly to those of the fluidblast type wherein the arc drawn upon opening of the circuit is subjected to an extinguishing jet or blast of huid, and has for its principal object the provision of an improved circuit interrupter of the aforesaid type which shall be uniformly effective over a comparatively wide interrupting range.
  • FIG. single figure thereof is an elevational view, partly in section, of an electric circuit interrupter comprising my invention in the closed circuit position.
  • 'I'he electric circuit interrupter illustrated, by way of example, comprises a base structure I on which are mounted the relatively movable contacts, comprising in the present instance a xed socket-type contact 2 of well-known construction and a coacting movable rod contact 3.
  • the contacts which are shown in the closed circuit position engage by reason of a garter spring 4 which presses a plurality of segmental contacts into engagement with the rod contact 3.
  • the fixed contact 2 is mounted within a casing 5 defining a pressure-confining arc chamber, the casing 5 in the present instance being of conducting material and serving as one terminal of the circuit interrupter.
  • the fixed contact 2 is resiliently mounted within the casing 5 by means of the spring 6.
  • the casing 5 is provided with an exhaust passage comprising, in the present instance, a comparatively long tubular member 'l of insulating material suitably secured to the casing 5.
  • the rod contact 3 is guided within the tube 'I and forms a fairly close fit with the tube so that exhaust from the arc chamber is to a great extent precluded as long as the rod contact 3 is in the exhaust passage.
  • the operating means for the rod contact comprises an insulator 8 pivotally mounted at 9 on the base and connected at its upper bifurcated end I to a forked member I 0, which is in turn connected at II to an extension I2 of the rod contact.
  • the extension I2 is slidably guided at I 3 in the other terminal structure I3. Accordingly, an operating force suitably applied to the shaft .9 for rocking the insulator l is effective to move the rod contact 3 into or out of engagement with the coacting fixed contact 2, the contact 3 in the open (Cl. 20G-148) circuit'position being exteriorly of the tube l so that arcing pressure within the casing 5 is suddenly released to cause a fluid blast through the arc between the contacts 2 and 3.
  • the terminal casing 5 and the terminal structure at I3 are each suitably supported on the base I by insulators I4 and I5, respectively.
  • the arc created upon opening of the circuit forms a more or less high pressure, either by heatingithe air in the arc chamber or by the evaporation of the insulating material with which the arc comes in contact.
  • the amount of the pressure created is of considerable importance for proper interruption of the arc.
  • the circuit interrupter is provided with a source of auxiliary fluid pressure which is effective at low currents for augmenting or supplanting the arc pressure in the arc chamber and which at high currents i is connected at I 6 through a piston rod Il to a piston I8, the piston operating within a cylinder I9 which is arranged to be in communication, 50 through the conduit 2li, with the arc chamber in thecasing 5.
  • is disposed in the casing 5 for controllingsthe passage through the conduit 20 and is biased by a light spring 22 into seating engagement so as normally to close said passage,
  • valve being seated so as to be opened by pressure within the conduit 2li.
  • the compressed gas supplied by the piston i8 increases the pressure within the arc chamber so that the arc is effectively interrupted when the rod l leaves the tube 1, whereas at high currents the arc itself produces sumciently large pressure for interrupting the circuit.
  • admits, without appreciable resistance, gas under pressure to the arc chamber and at some predetermined higher current the arcing pressure within the chamber is greater than the pressure developed by the piston I8, with the result that the-valve 2
  • the valve 2l therefore, ⁇ not only serves to maintain proper blast pressure within the arc,
  • An electric circuit interrupter of the fluidblast type comprising 'relatively movable contacts, one of said contacts being disposed within a pressure-confiningv arc chamber and another of said contacts being movable from said chamber, arc pressure generated in said chamber causing a fluid blast in the direction of said movable contact, an auxiliary source of fluid pressure arranged to be in communication with said chamber, and a valve between said chamber and source arranged to close when the arc pressure in said interrupting chamber exceeds that of said source.
  • An electric circuit interrupter of the uidblast type comprising relatively movable contacts, one of said contacts being disposed within a pressure-connng arc chamber, said chamber having an exhaust passage defined by a comparatively long tubular member of insulating material, another of said contacts comprising a movable rod for engaging the aforesaid contact in said chamber, said rod being closely surrounded by said insulating tube and movable to an open circuit position exteriorly of said tube, an auxiliary source of uid pressure arranged to be in communication with said chamber for supplying pressure to said chamber at low currents, and a valve disposed in said chamber controlling communication between said chamber and source arranged to close when the arc pressure in said chamber exceeds the pressure of said source.
  • An electric circuit interrupter of the duldblast type comprising relatively movable contacts, one of said contacts being disposed within'a pressure-confining arc chamber, said chamber having an exhaust passage defined by an insulating tube, another of said contacts comprising a movable rod slidable through said tube for engaging the aforesaid contact in said chamber, said rod hav- ⁇ ing a.
  • a source of pressure arranged to communicate with said chamber including a piston operatively connected to said movable rod contact, said piston supplying auxiliary pressure to saidchamber at low currents, and a valve positioned between said chamber and piston arranged to close when the arc pressure in said chamber ex' ⁇ v ceeds the pressure produced by said piston.

Landscapes

  • Arc-Extinguishing Devices That Are Switches (AREA)
  • Circuit Breakers (AREA)
US53074A 1934-09-15 1935-12-05 Electric circuit interrupter Expired - Lifetime US2056033A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE443187X 1934-09-15
DEA74836D DE670764C (de) 1934-09-15 1934-12-16 Elektrischer Gasschalter

Publications (1)

Publication Number Publication Date
US2056033A true US2056033A (en) 1936-09-29

Family

ID=25939919

Family Applications (1)

Application Number Title Priority Date Filing Date
US53074A Expired - Lifetime US2056033A (en) 1934-09-15 1935-12-05 Electric circuit interrupter

Country Status (7)

Country Link
US (1) US2056033A (enMihai)
AT (1) AT149615B (enMihai)
BE (1) BE411269A (enMihai)
CH (1) CH187520A (enMihai)
DE (1) DE670764C (enMihai)
GB (1) GB443187A (enMihai)
NL (1) NL46565C (enMihai)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3345487A (en) * 1965-02-16 1967-10-03 Westinghouse Electric Corp Hydraulically operated circuit breaker
US3940583A (en) * 1973-03-30 1976-02-24 Siemens Aktiengesellschaft Arc quenching arrangement

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3345487A (en) * 1965-02-16 1967-10-03 Westinghouse Electric Corp Hydraulically operated circuit breaker
US3940583A (en) * 1973-03-30 1976-02-24 Siemens Aktiengesellschaft Arc quenching arrangement

Also Published As

Publication number Publication date
AT149615B (de) 1937-05-10
GB443187A (en) 1936-02-24
BE411269A (enMihai)
DE670764C (de) 1939-01-25
CH187520A (de) 1936-11-15
NL46565C (enMihai)

Similar Documents

Publication Publication Date Title
US2306186A (en) High voltage electric circuit breaker
US2459599A (en) Circuit interrupter
US2258226A (en) Electric circuit breaker
US2238567A (en) Circuit breaker
US2056033A (en) Electric circuit interrupter
US3045086A (en) Circuit interrupters
US2147497A (en) Electric circuit interrupter
US3275778A (en) Compressed-gas circuit interrupter with pressurized arcing chamber and downstream blast valve
US3290469A (en) Compressed-gas circuit interrupter having cavitation means
US2394046A (en) Circuit interrupter
US2911492A (en) Operating mechanism for a fluid blast circuit breaker
US2246171A (en) Method of and apparatus for interrupting electric arcs
US2672541A (en) Electric circuit interrupter
US2199607A (en) Circuit interrupter
US2500429A (en) Electric gas blast circuit breaker
US2240233A (en) Gas blast circuit breaker
US4511776A (en) Break chamber for a gas-blast circuit breaker
US3538282A (en) Fluid-blast circuit interrupters with exhaust valves responsive solely to the pressure generated by an arc of excessive magnitude
US3076080A (en) Fluid blast interrupting device for oil circuit breakers employing auxiliary contact
US3073931A (en) Compressed-gas circuit interrupter
US2067673A (en) Circuit interrupter
GB1049497A (en) Improvements in and relating to gas blast circuit breakers
US2342809A (en) Compressed air circuit breaker
US2019348A (en) Electric circuit interrupter
US2391759A (en) Electric circuit interrupter