US2253009A - Circuit interrupter - Google Patents

Circuit interrupter Download PDF

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Publication number
US2253009A
US2253009A US230946A US23094638A US2253009A US 2253009 A US2253009 A US 2253009A US 230946 A US230946 A US 230946A US 23094638 A US23094638 A US 23094638A US 2253009 A US2253009 A US 2253009A
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United States
Prior art keywords
arc
chamber
contact
circuit
liquid
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Expired - Lifetime
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US230946A
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English (en)
Inventor
Benjamin P Baker
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Westinghouse Electric Corp
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Westinghouse Electric Corp
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Filing date
Publication date
Priority to BE436436D priority Critical patent/BE436436A/xx
Priority to NL62093D priority patent/NL62093C/xx
Application filed by Westinghouse Electric Corp filed Critical Westinghouse Electric Corp
Priority to US230946A priority patent/US2253009A/en
Priority to CH212512D priority patent/CH212512A/fr
Priority to GB26228/39A priority patent/GB534936A/en
Application granted granted Critical
Publication of US2253009A publication Critical patent/US2253009A/en
Anticipated expiration legal-status Critical
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    • 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
    • H01H33/88—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts
    • H01H33/90—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts this movement being effected by or in conjunction with the contact-operating mechanism
    • H01H33/92—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts this movement being effected by or in conjunction with the contact-operating mechanism the arc-extinguishing fluid being liquid, e.g. oil

Definitions

  • the moton oi arc extnguishing liquid when the moton oi arc extnguishing liquid is parale to the are, there is little tehdency for the moving liquid to :inter fere with the flow oi current other than at zero, thus keeping the are energy and gas generation to a minimum value.
  • the iongituclinai flow of arc extinguishing liquid also rapidly removes the excess gas from around the are as it is generated so that as the current approaches' its zero value, the last smalllament of arc may 'oe regarded ⁇ as passing through a small hole or chimney in the arcextinguishing liquid.
  • the main object of my invention is .the provislon of an improved ercuithreaker structure wherein circuit inter'uption 'is accomplished in accorclance With aforenaned principies.
  • Another object of my invention is the provsion a circuit brealrer capable of interrupting large number of volte per inch of contact separaton withoutgenerating appreciable arc energy and with a minimum of are extnguish- .ing liquid deterioraton.
  • a fur-ther object of my invention is the provision of a crcuit nterruoter, the performance of whel ally consistent over the entire our garless of power factor or typ interrupted.
  • - Fig. 3 is a; longitudinal sectional viewof the interrupting assenbly of my breaker in the closed'circuit position.
  • FIG. 4 is a longitudinal sectional view of the interrupting assembly in the open circuit position.
  • Fig. 5 is a longitudinal sectional view showing the movable contact carrying member of the interrupting assembly on a slightly reduced scale.
  • Fig. 6 is a fragmentary sectional View showin details of the disconnect contacts between the Operating mechanism" and the movable contact carrying member, and
  • Figs. 7 to 10 are cross sectional views of the interrupting assembly taken respectively along the lines VII-VII, VIII-VIII, IX-IX, X-X of Fig. 4.
  • the reference numeral ll designates a fabricated steel support having a base plate
  • 3 carries a tubular insulator l5 of weather.. proof material, such as porcelain or the like.
  • 5 is a tubular strain member l1'of insulating materlal having a metallic collar l9 disposed at each end thereof.
  • the lower collar I9 serves as an anchoring means for securing the strain member l1 to the base plate !3.
  • a flange casing member z rests upon the upper end of the insulator !5 and is held in place by means of an annular plate 23 secured by bolts 25 to the upper collar
  • 1 thereby maintains the insulator !5 in position and relieves it of all strain except those which occur in compression.
  • is provided with a cover plate 2150 as to form a complete enclosure or compartment within the tubular strain member l1. This compartment is sealed and adapted to house the current transformer of the interrupter generally indicated at 29. Inasmuch as the specific construction of the current transformer 29 forms no part 'of the invention, it need not be further described.
  • having a top plate 33 which supports a second tubular insulator 35 also of weatherproof material, such as porcelain or the like.
  • a second strain member 31 Disposed within the insuiator 35 is a second strain member 31 having metallic collars 39 at each end thereof similar in construction to the collars
  • the tubular strain member 31 is secured to the support' plate 33 by means of stud bolts 4
  • An annular bearing plate 43 resting on the upper end of the insulator 35 in conjunction with the annular support plate 45 and the bolts 41 serve ⁇ to join the upper end of the insulator 35 to the tubular strain member 31. 'I'hus the strain member 31 also maintains the weatherproof insulator 35 in compression and relieves the latter of all other strain.
  • the hearing plate 43 carries a deme-like closure 49'for closing the upper end of the interrupter housing.
  • the space within the tubular strain member 31 is utilized as an interrupting compartment for housing an interrupting assembly 5l of the circuit breakeri
  • the interrupting assembly 5l as more clearly shown in Fig. 3, comprises two interrupting elements 53 and 55 disposed in axial alinement and joined by a metallic fiange section 51.
  • the upper end of the interruptng element 53 is provided with a fianged casing member 59 having outwardly projecting support arms 6I.
  • the support arms 6l carry the entire weight of the circuit interrupting assembly and are adapted to be bolted to the annular ring 45 so as to suspend the interrupting assembly 5! with- '1l having a corrugated surface.
  • the circuit interrupting elements 53 and 55 are constructed of tubular members 63 of insulating material which have metallic collars 65 screw threaded to each end thereof.
  • the metallic collars 65 serve as means in conjunction with suitable bolts, as shown, for joining the two interrupting elements to each other and also for joining the elements to the flange support 59.
  • Each of the tubular sections 63 carries a plurality of annularly shaped plates or washers 31 and 69 alternately disposed in stacked relation and of insulating material, preferably fiber or other material, which will resist the direct action of an arc thereon.
  • the inside diameter of the washers 61 are smaller than the inside diameters of the washers 69 so as to provide an arc chamber
  • the larger washers 61 of the interruptlng element 55 have an inside diameter which is larger than the inside diameter of the plate 51 in the interrupting element 53.
  • the general diameter of the arc chamber 11 of the interrupting element 55 is larger than that in the interrupting element 53, the purpose of which will appear more fully hereinafter.
  • a fixed contact support 13 Disposed between the flange support 59 and the upper collar 65 of the interrupting element 53 is a fixed contact support 13, in this instance carrying four resilient contact fingers 15.
  • the contact ngers 15 are connected by means of fiexible shunts 11 to the flange support member 59.
  • a second fixed contact support 13 is also disposed between the fiange spacing member 51 and the upper collar 65 of the interrupting element 55.
  • This second fixed contact support also carrie four fiexible contact ngers 15. In the latter instance, however, these Contacts are connected by flexible shunts 19 to a movable contact member which will be explained more fully hereinafter.
  • the moving contact assembly is carried by a rod-like Operating member generally indicated at BI extending longitudinally through the interrupting elements 53 and 55.
  • the Operating member BI is more clearly shown in Fig. 5 and constitutes a central support member 83 of insulatlng material having a threaded metallic fitting 35 secured to each end thereof.
  • a metallic cep member 81 which, in turn, supports a contact ring 39 having three main current carrying contacts 9l and an arcing contact 93 formed thereon.
  • Surrounding the support rod 83 is a sleeve of insulating material which is highly arc resistant.
  • contact ring 89 are a, plurality of washers 91 and 99 alternately disposed and having different outside diameters so as to present a corrugated external cylindrical surface.
  • Adjacent the group of wash ers 91 and 99 at the lower end of the sleeve 95 is a metallic sleeve Hil, the lower end oi' which has a squared recessed portion !03 to which the ende of the flexible shunts 19 are connected.
  • the up per en'd of the conducting sleeve o supports a second contact ring 89 of somewhat smaller diameter than the ring at the lower end of the assembly.
  • the upper contact ring 69 is also provided with three main current carrying contacts 9
  • the contacts 9! and 9 i of the upper contact ring 89 are adapted to register with the contact finger 15 on the circuit interrupting element 53 when the interrupter is in the closed circuit position, as shown in Fig. 3.
  • the Contacts 9! 'and 93 vof the lower conmore clearly shown at "5 in Fig. 1.
  • the pull tact ring 89 engage the contact fingers 15 of the lower interrupting element 55.
  • the cap member ti of the movable Operating member iii is'provicled, as shown more clearly in Fig. 6, with a disconnect contact assernbl'y housed within the collar MU screw threadei thereto.
  • collar iii is provided with a plurality of contact firigers MS adaoted to make 'siicling en gageme'nt with a hayohet type contact ti carrid by the upper enti of an actuatihg iriember 4 tou, lcl' s' terminal s 625 passing throu the
  • the inner rnis of the termirai stucls iii are respectiveiy connecte by suitable leads isi arcl to the current transferta e
  • the operatihg meniher iii arranges !Cka cprccating moi/em it axially o the inter rupting elements s moved dovm wardly to
  • the threci pi'essure 'plote &s'i is secured to the upper ends of a ;olurality of guide and support rocls Mi anchored in the sup- 'l he lower and movable pressure plate is securecl to a screw threarled portion i of the guide sleeve sos formihg ⁇ the upper end of the Operating member ei and is provided with suitable apertures through which the soo port rools Mi may pass and serve'to guidc 'the plote during its reciprocal movement.
  • the operating meniher &i is held in the closed position against the action of the springs i, as shown in Fig. 3, by a suitable actuating mecha- 'nisin connected to the Operating member ill, as
  • the rod !41 is sealed with respect to the' casing by means of a tube ne, the upper end of which is joined in a liquid-tight manner to the coverplate 27, whereas the lower end is joned in a similar manner to the base plate l3.
  • the lower end of the pull rod !41 is coupled to an arm !49, which, in turn, is 'Secured toa torsion shaft
  • the right-hand side of the torsion shaft !55 andthe arm !49 are disposed within a liquid tight chamber !55.
  • the actuating mechahism m operated; by the memel reci MTI, raises the member :lil so that the contact ii engae'es the spring pressed con tacts to complete the eiectrical circuit ieetweeh .the Operating member &i and M'i'.
  • the operating member M is further guided during its reoiprocating movement at its upper end by the closu'e plate Ist Secured to the upper end of the support fiange 69.
  • the guide sleeve !05 is grooved circumferentially, as shown.
  • the operating member a is also guided by' a closure plate !61 secured between the lower collar 66 o! the interrupting element 93 and the flange casing 51.
  • is adapted to slide, is provided with an annular recess !69 which has its innermost wall tapering towards the sleeve IOI so as' to provide a knife like scraping edge adjacent the sleeve.
  • This scraping edge maintains the sleeve Illl !ree from foreign matters such as may occur from the establishment of an arc within the arc chamber 1 l during circuit interruption and thus prevents the sleeve n from binding as it passes through the closure plate l61.
  • a similar scraping device is provided in the form of a guide annulus l1
  • the arc chambers as defined by the washers 61 are of generaily clrcular cross section. noted that the arcing contacts 93 carried by the two contact rings 99 extenda short distance laterally from their respective contact rings.
  • the washers 61 are provided with notched portions !16 to provide an elongated groove or passage into which the arcing contacts 93 are adapted to be moved during the opening movement oi! the interrupter.
  • the washers 91 on the member s have a diameter such that there is but slight clearance between these washers and the washers 61 deflning and limiting the side walls of the arc chambers 1I.
  • the outside diameter of the insulating washers 91 of the upper group is slightly greater than the outside diameter of the guide sleeve lfl I.
  • the guide sleeve !65 is oi' less diameter than the washers 91.
  • a greater Volume of material as constituted by the washers 91 and 99, is moved into the arc chamber 1
  • in the interrupting element 63 may be designated as an expansion chamber !11 into which arc gases resulting !rom an arc drawn between the arcing contact 99 and its corresponding"xed contact flnger 15 may escape. Flow of arc gases into the It should be' i Fig. 4.
  • .expansion chamber l11 is also augmented by virtue of the partial evacuationwithin the chamber as above described.
  • a vent opening is provided through the side wall of the tubular member 63, as shown at
  • the vent opening !19 is so proportioned that during the initial opening movement ot the operating member sl, partial evacuation will take place at a rate greater than the in flow of arc extinguishing liquid from the arcing space 1l tending to displace the evacuated space.
  • the relative proportion between the diameters of the washers 91, the connecting sleeve u and the cap member 81 are maintained, as in theinterrupting element 53, that is, the washers 91 are of slightly greater diameter than the cap member 91 and the upper end of the Operating member ll1.
  • This arrangement provides a piston for orcing arc extinguishing liquid longitudinally of the notched path !15 of the arc passage 1l.
  • the external diameter oi the conducting sleeve u is of smaller diameter than the external diameter of the washers 91.
  • the space between the lower arc chamber 1I and the closure member !61 forms a second expansion chamber a which is slightly evacuated during the opening movement of the operating member 6! so as to cause a ready escape of the gas from the arc chamber 1l into the expansion chamber.
  • the expansion chamber l6l is also vented at [83 in the side Wall of the lower interrupting element 55.
  • the respective arcs are, therei'ore, conflned to an elongated relatively narrow arc passage which is closed at the lower end and opened only at the upper end into the expansion chambers
  • Arc gas generated as a result of decomposition of arc extinguishng liqud by the arc, will escape freely longitudinally of the arc into the respective expansion chambers. Escape of the gas from around the region oLthe arc is also accelerated by virtue of the evacuating eifect produced by movement of the Operating member Bl. Removal of arc gases is further facilitated by the pumping action produced by the Operating member 8! as it moves downwardly causing the displacement of arc extnguishing liquid longitudinally of the arc in a direction towards the respective expansion chambers.
  • the desired increase in pressure upon the arc during the final stage of arcing is further augmented by a decrease in velocity of the Operating member 8
  • the vol'- ume of the 'expansion chambers are increased at a rate which is iess than the rate of increase in volume of gas being generated in' the arc chambers.
  • the 'arcpress'ure is also constantly increased as a result of piston action, by movement of the washers 91 farther into the arc chamber "H, as a result of; an 'increasein resistance to the flow ofiiquid from the arc cham- I ber. It is, therefore, apparent that arc eXtinction takes place without breaking the continuity' of the arc stream; 'I *his' method of arc 'extinction avoids a rapid increase in arc voltage,
  • a quantity of arc extinguishing liquid means of insulating material dening an elongated arc passage immersed in said liquid, said arc passage having walls which present irregular surfaces 'and being open only at one end, a pair of "cooperatingv contacts 5 ating with said plungermember for drawing an arc from a point outside said arc chamber into the arc chamber along said constricted arc path,
  • a quantity of arc extinguishing liquid, 'means of' insulating material immersed in said liquid defining an arc chamber open only at one end and the inside walls of which have grooves extending therearound, a
  • a body of arc extinguishing liquid means of insulat ing material immersed in said liquid d'efim'ng an elongated arc chamber and a cylindrical passage disposed side.
  • arc chamber having a vent opening' ⁇ only at at least %one of which .is permanently positioned outsidesaid arc .passage adjacent .the -open end thereof, a movable member of insulating material having irregular suraces and supporting the other of' said pair of contacts, and means volume ofsaid enclosed space and venting means for controlling' the pressure within said enclosed space.
  • a quantity -of-arc rial defining an arc .chamber -immersed in said i liquid. said arc chamber-being open only 'at one end, a grooved' surface plunger member of in-v 6.
  • acircuit interrupter means defining an arc chamber, separable contacts for drawing an arc within said arc chamber, means for actuating said contacts toopen and closed positions, means deflning an enclosed space of variable Volume adiacent said arc chamber and into which arc gases are adapted to flow, and means actuat'ed by said contact actuating means for increasing the Volume of said enclosed space during the initia stage of arcing at a rate g'reater than the rate o! increase in Volume of gas being generated in said arc chamber, said last named means causing the Volume oi' said enclosed space to increase during the final stage of arcing at a rate less than the rate of' increase in Volume of gas generated by the arc.
  • a body of arc ex tinguishing liquid means defining an arc chamber immersed in said liquid, separable Contacts at least one of which is movable for drawing an arc in said arc'chamber, means defining a ventinmchamber adjacent said arc chamber into which arc gas from said arc chamber is adapted to flow, and an Operating member extending through said arc and venting chambers for actuating said movable contact and causing arc extingulshing liquid to flow longitudinally of the arc in a direction opposite to the direction of contact movement, said Operating member causing a reduction in hydrostatic pressure on the arc' during the initial arcing period to facilitate the flow of gas into the venting chamber anda sudden increase in hydrostatic pressure near the end of the arclng period for raising the reignition voltase.
  • a body of arc extinguishing liquid immersed in said liquid, an arc chamber within said enclosure, an expansion chamber within said enclosure adjoining said arc chamber, a 'stationary contact adjacent one end ot said arc chamber, a moving contact adapted to cooperate with said stationary contact.
  • a movable contact carrying member extending through said arc chamber and having a portion normally extending into said expansion chamber, means for actuating said contact carrying member to separate said contacts to establish an arc in said arc chamber and to move the portion of said contact carrying member within said expansion chamber into the arc chamber, the
  • portion of said contact carrying member moved into said arc chamber being so proportioned with respect to the arc chamber that the arc is conflned to a narrow elongated path therein and the pressure within the expansion chamber is materiaily reduced upon movement of the contact carrying member therefrom at least 'during the initial stage ot the arc extinguishing. operation, and venting means for controlling the pressure within said expansion chamber.
  • a body of arcextuishing liquid immersed in said liquid, an arc chamber within said enclosure, an expansion chamber within said enclosure ad'- Joining said arm chamber, a stationary contact adjacent one end of said arc chamber, a piston member normally within said expansion chamber and movable into said arc chamber, a movable contact carried by said piston member and adapted to cooperate with said stationary contact, means for moving said piston member into said arc chamber to establish an arc therein and to force arc extinguishing liquid in a direction lonzitudinally ot the are towards said expansion chamber, said piston member upon movement out oi' said expanslon chamber causing a reduction in pressure therein to aid the products o! decomposition of the arc within the arc chamber to now into the expansion chamber to prevent the formation of pressures within the arc chamber during the initial arcing period detrimental to arc extinction, and means for venting said expansion chamber.
  • a body of arc extinguishing liquid means within said liquid defining an arc chamber open at one end, an expansion chamber communicating with the open end of said arc chamber and said expansion chamber being otherwise substantially closed except for the vent means set forth below, a plunger member movable from said expansion chamber into said arc chamber, means for simultaneously drawing an'arc within said arc chamber and moving said plunger member into said arc chamber, said plunger member confining the arc to a relatively constricted path longitudinally of said arc chamber and subjected it to a longitudinal flow of liquid, and relatively restricted vent means for said expansion chamber cooperating With the movement of said plunger member out of said expansion chamber to prevent the rise of pressure above a predetermined value within said arc chamber during the initial stage of arcing.
  • an interrupting unit comprising a stationary and a movable part ar- 'anged to form a plu'ality of serially associated interruptng elements, said stationary and said movable parts having alternate sections of conducting and insulating material disposed in endto-end relation, separable contact means arranged to interconnect the conducting sections of said stationary and said movable parts to form a conducting circuit through said unit when said conducting sections are disposed in staggered 'relation, said movable part having at one end of each section of insulating material an enlarged portion acting as a piston, and means for moving said movable part to break the electrical connection between said conducting sections to establish a plurality of serially related arcs and to bring the insulating sections of said moving part to a position opposite the insulating sections respectively of said 'stationary part for drawing and conning each arc in the space between an insulating section of the movable part and an insulating section of the stationary part.
  • a body of arc extinguishing iiquid means within said liquid defining a plurality of arc chambers disposed innalinement, a fixed contact adjacent one end of each of said arc chambers, an operating member movable through said arc chambers, a cooperating movable contact for each fixed contact carried by said Operating member, said Operating member having a piurality of enlarged portions each of which is normally disposed outside of a respective arc chamber when said fixed.
  • a body of arc extinguishing liquid a tubular casing immersed in said liquid, means dividing said casing into a pluraiity of expansion and arc chambers alternately disposed longitudinally of said casing; an Operating member extendin a 2,253,oo9 i through said chambers and closing one end of' supporting the other of said contacts, and means for moving said movable member into said arc passage to-establish an arc therein and to cause.
  • an arc chamber separable contacts for establishing an arc within said chamben a movable member extending through said arc chamber for actuating at least one of said Contacts; and a closure for one end of said arc chamber having an -aperture therein through which said movable member is adapted to slide, said closure having aportion surrounding said aperture whichtapers inwardly with rer spect to said chamber and towards said movable member to provide a scraping edge for remov- 'ing particles of decomposition of the arc from vide a corrugated wall dening said arc passage,
  • a movable member including a stack of washers of insulating material for carrying 'at least one of said contacts, alternatewashers comprising said movable member being ot dlfierent e external diameter to provide a corrugated external surface, and means for 'moving said movable member into said arc passage to establish an arc therein and to provide a flow of arc extincomprising said movable member having a thickness different than a plurality of the washers defining said arc passage to prevent interlocking of said movable member with the side walls of said arc passage as the result of lateral thrusts I' 'grooves and ridges therein, a pair o!
  • cooperating contacts at least' one of which is positioned adjacent one end of said arc passage; a movable member at least partially of insulating material having alternate grooves and ridges thereon and interlocking of said movable member 'with the side walls of said arc passage is prevented.
  • a quantity of arcextinguishing liquid means of insulating'material defln-ing an elongated 'arc passage open only at i one end and immersed in said liquid, a pair of cooperating contacts, at least one of which is positioned adjacent the open end of said arc passage; a movable member at least partially of insulating material supporting the other of said Contacts, and means for moving said movable member and its associated contact into said arc passage to establish an arc therein, said movable member being closely tted with respect to the insulating material for holding the alternate sections of conducting and insulating material of said movable part together, separable contact means arranged to interconnect the conducting sections of 'said stationary and said movable parts to form a conducting circuit through said unit When said conducting sections are disposed in staggered relation, and means for moving said movable part to break the electrical connection between said conducting sections to establish a plurality of serially related arcs and to bring the insulating
  • a circuit interrupter an arc chamber, stationary contact means in said arc chamber, a movable contact member coacting with said contact means, said contact member comprising two coaxial separable sections, at least' a portion of both sections being within said arc. chamber when the interrupter is in the closed position, and means Operating said contact member to open circuit position to establish a circuit interrupting arc in said chamber between said contact means and one of' said sections and subsequently separate said sections to establish an isolating break outside said chamber.
  • a circuit interrupter an arc chamber, stationary contact means in said arc chamber, a movable contact member coacting with said contact means, said contact' member comprising -two coaxial separablesections operable at least in part through an opening in one end of saidarc chamber, at least a portion' of both sections being within said arc chamber when the interrupter is in the closed position, and means operating said contact member to open circuit position'to establish a circuit interrupting arc in said chamber between said contact means and one of said sections and subsequently separate said sections to estabiish an isolating break outside said chamber, said sepa'able sections coacting with each other and said arc chamber to seal the opening therein during the circuit opening operation of the interrupter.
  • an interrupting unit comprising a stationary and a movable part arranged to form a piurality of seriaily associated interrupting elements, said stationary and said movabie pa'ts having alternate sections ot conducting and insulating material, separabie contact means arranged to interconnect the conducting sections oi said stationary and said mov- 15 able parts to form a conducting circuit through said unit when said conducting sections are disposed in staggered relation, and means for moving said movable part to break the eiectrical connection between said conducting sections to establish a plurality of serially related arcs and to bring the insuiatng sections o!
  • said moving part to a position opposite the insulating sections of said stationary part, said conducting and insula'ting sections being substantiaily of equal lengths so that each arc drawn between said separabie contact means is confined in the space tween two opposed insulating sections.

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  • Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Arc-Extinguishing Devices That Are Switches (AREA)
  • Circuit Breakers (AREA)
US230946A 1938-09-21 1938-09-21 Circuit interrupter Expired - Lifetime US2253009A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
BE436436D BE436436A (en(2012)) 1938-09-21
NL62093D NL62093C (en(2012)) 1938-09-21
US230946A US2253009A (en) 1938-09-21 1938-09-21 Circuit interrupter
CH212512D CH212512A (fr) 1938-09-21 1939-09-12 Interrupteur.
GB26228/39A GB534936A (en) 1938-09-21 1939-09-20 Improvements in or relating to liquid immersed electric circuit interrupters

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US230946A US2253009A (en) 1938-09-21 1938-09-21 Circuit interrupter

Publications (1)

Publication Number Publication Date
US2253009A true US2253009A (en) 1941-08-19

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Application Number Title Priority Date Filing Date
US230946A Expired - Lifetime US2253009A (en) 1938-09-21 1938-09-21 Circuit interrupter

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US (1) US2253009A (en(2012))
BE (1) BE436436A (en(2012))
CH (1) CH212512A (en(2012))
GB (1) GB534936A (en(2012))
NL (1) NL62093C (en(2012))

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2421267A (en) * 1942-06-24 1947-05-27 Bbc Brown Boveri & Cie Mechanical switching device
US2428597A (en) * 1943-07-10 1947-10-07 Westinghouse Electric Corp Circuit interrupter
US2522994A (en) * 1946-07-19 1950-09-19 Gen Electric Electric circuit interrupter
US2580291A (en) * 1947-02-21 1951-12-25 Westinghouse Electric Corp Circuit interrupter
US2658976A (en) * 1948-12-03 1953-11-10 Electrical Eng Equipment Co Air circuit interrupter
US2913556A (en) * 1956-03-14 1959-11-17 Westinghouse Electric Corp Circuit interrupters
US3082308A (en) * 1957-12-06 1963-03-19 Westinghouse Electric Corp Circuit interrupter
CN102412087A (zh) * 2011-07-15 2012-04-11 成都凯赛尔电子有限公司 真空灭弧室动静触头表面净化系统
CN117810017A (zh) * 2024-02-29 2024-04-02 武汉飞特电气有限公司 一种波纹管外置的真空开关管

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3164703A (en) * 1959-09-15 1965-01-05 Westinghouse Electric Corp Circuit interrupter of the single-bushing type with canted terminal-bushing construction

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2421267A (en) * 1942-06-24 1947-05-27 Bbc Brown Boveri & Cie Mechanical switching device
US2428597A (en) * 1943-07-10 1947-10-07 Westinghouse Electric Corp Circuit interrupter
US2522994A (en) * 1946-07-19 1950-09-19 Gen Electric Electric circuit interrupter
US2580291A (en) * 1947-02-21 1951-12-25 Westinghouse Electric Corp Circuit interrupter
US2658976A (en) * 1948-12-03 1953-11-10 Electrical Eng Equipment Co Air circuit interrupter
US2913556A (en) * 1956-03-14 1959-11-17 Westinghouse Electric Corp Circuit interrupters
US3082308A (en) * 1957-12-06 1963-03-19 Westinghouse Electric Corp Circuit interrupter
CN102412087A (zh) * 2011-07-15 2012-04-11 成都凯赛尔电子有限公司 真空灭弧室动静触头表面净化系统
CN102412087B (zh) * 2011-07-15 2013-12-04 成都凯赛尔电子有限公司 真空灭弧室动静触头表面净化系统
CN117810017A (zh) * 2024-02-29 2024-04-02 武汉飞特电气有限公司 一种波纹管外置的真空开关管

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NL62093C (en(2012))
CH212512A (fr) 1940-11-30
BE436436A (en(2012))
GB534936A (en) 1941-03-24

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