US2282154A - Circuit interrupter - Google Patents

Circuit interrupter Download PDF

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Publication number
US2282154A
US2282154A US313745A US31374540A US2282154A US 2282154 A US2282154 A US 2282154A US 313745 A US313745 A US 313745A US 31374540 A US31374540 A US 31374540A US 2282154 A US2282154 A US 2282154A
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US
United States
Prior art keywords
gas
tank
arc
blast
contact
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
US313745A
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English (en)
Inventor
Andrew H Bakken
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.)
CBS Corp
Original Assignee
Westinghouse Electric and Manufacturing 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
Priority to BE483534D priority Critical patent/BE483534A/xx
Application filed by Westinghouse Electric and Manufacturing Co filed Critical Westinghouse Electric and Manufacturing Co
Priority to US313745A priority patent/US2282154A/en
Application granted granted Critical
Publication of US2282154A publication Critical patent/US2282154A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/02Details
    • H01H33/53Cases; Reservoirs, tanks, piping or valves, for arc-extinguishing fluid; Accessories therefor, e.g. safety arrangements, pressure relief devices
    • H01H33/56Gas reservoirs

Definitions

  • This invention relates to improvements in circuit interrupters and, more particularly, tc circuit breakers of the gas blast type.
  • a more specinc object of the invention resides in the provision of a hinged type moving contact structure for a breaker of the aforesaid type which provides a low resistance conducting path free of exible shunts or sliding contacts.
  • Another object 'of my invention is to provide an arc extinguishing structure in -the form of an parc chute for a gas blast .type ot circuit interrupter that is so arranged with respect to the contact assembly and the gas supply means thereto that the arc chute can be easily removed without disturbing the contact assembly or its operativeness for the purpose of enabling ready inspection of the condition oi' the contacts and/or making adjustments 'to the operating mechanism for the contacts.
  • a further object of my invention is to provide an improved pressure actuated operating mechanisxn for gas blast circuit breakers which. incorporates mechanically actuated means for oontrolling the admission of an arc extinguishing blast of gas to the arc extinguishing structure 15. prove the operation of circuit interrupters of the breaker.
  • Fig. 2 is a side elevation view of the circuit interrupter shown in Fig. l, partially in section vfor more clearly illustrating the gas blast control and the operating mechanism, and
  • Fig. 3 is an enlarged fragmentary view partiallyin'section 'showing a modiiied gas blast control arrangement.
  • the reference nilmeral l designates a tank for storing gas, such as air, under pressure. Extending from the top of the tank l are a pluraiityof, in this instance. three flanged conduits 5. Secured to the ilanged portion of each conduit 5 is a metallic valve casing 'L Mounted upon the upper 'end of each valve casing 1 is a tubular insulator I which, in
  • the support ii also carries a stationary contact assembly il including a plurality of spring pressed contact nngers i5.
  • a throat-like gas passage il extends through the support ii and is preferably coextensive with the passage through the tubular insulator 9.
  • the throat-like passage I1 discharges into an arc chute structure Il having two generally parallel sidewalls 2i and 2l.
  • the side walls l2l and 23 are adapted to rest upona support Il and are secured thereto by a pair of transversely extending bolts 25 which are the sole means for holding the arc chute in place.
  • Each are chute i9 is generally of the typ more fully shown and described in the application of L. R.
  • each arc chute I! is provided with a rectangular slot 2l atthe lower end thereof tin-ouah which a blade-like movable con-V tact 2l may operate into and out of engagement valve for all phases of the terminal 31.
  • the movable contact 29 is preferably of inverted L-shaped blade construction having a bifurcated arm 3 the two legs of which are pivoted at 33 to a conducting bracket 35 clamped about the tubular insulator 9.
  • the pivotal connection 33 is of the high pressure type so'that good electrical contact is maintained at all times between the bracket 35 and the arm 3
  • the right-hand side of bracket 35 is provided with. an external circuit terminal 3l?.l
  • the stationary contact assembly is is also provided with an externalv circuit terminal indicated at 35.
  • an electrical circuit ismade therethrough from the terminal 39, stationary contact i5, moving contact 29, contact arm 3
  • This operating mechanism is preferably of the gas pressure operated type and includes a cylinder 33, a piston therein. (not shown) providedwith a connecting rod d5 'f extending from theupper end of the cylinder.
  • the connecting rod is coupled by a pair oi links dl to .a crank arm 59 secured to a cross shaft 5
  • for examplefmay be 15 -to rotate in the clockwise direction, depressing the valve stem 19 to cause valve 8
  • has a :high side 83 which maintainsy the valve 8
  • the valve 65 rests upon, and is supported by, a'
  • Thyalves 59 and 65 are secured to the cylinder t3 so as to form a unit and are supported solely' by the conduits 63 and 69 carried by the tank3.
  • Actuation of the .valves 59 and B5 may be by any suitable means, such as electromagnetic, pneumatic, or combinations of both.
  • crank arms 55 is provided with a cam 'il which is adapted to engage ⁇ a roller 13 carried by a bell crank 15.
  • Thebell crank 15 is operatively coupled at 11 to the end of a valve stem 19 extending through the valve casing 1.
  • valve stem 19 carries a valve f 3
  • crank arms 55 are rotated in a clockwise direction until they engage stop members 85 so positioned that the crank arms 55 and theirl associated operating rods 51 form a slightly overcenter toggle relation with each other, thereby maintaining the moving contacts 2a positively locked in the closed circuit' position.
  • crank arm 55 has been replaced with an arm 81.
  • the crank arm Blvdiiers from crank arm 55 in that the former has a collapsible cam portion 88 l whereas the cam portion 83 ci the latter is iixed.
  • the cam portion or member89 isl coupled to the crank arm 81 by two pairs of short links 9
  • each pivot pin 95 biases the cam member 89 in a clockwise direction with respect to. pins 95 against a stop ⁇
  • crank arm 81 is rotated in a clockwise direction
  • the cam 89 will collapse upon being brought into forceful engagement with the roller 13 and take a position as shown in dotted lines in Fig. 3.
  • the cam 89 is ineffective to actuate the roller 13 and the bell crank 15, thereby permitting the valve 8
  • the cam P89 is brought into ⁇ a position to clear the roller 13.
  • a tank for storing gas under pressure a hollow insulator supported by said tank, stationary contact means mounted on the free end of said insulator, a coacting movable contact pivotally mounted upon said insulator intermediate the ends thereof and having its contact portion movable across the free end of said insulator in a path generally at ⁇ right angles to the longitudinal axis of said insulator, operating means for moving said movable contact into and out of engagement with said stationary contact means mounted on the free end of said insulator to make and break the connected circuit, arc extinguishing means also mounted on the free end of said insulator, and
  • a tank for storing gas under pressure a straight hollow insulator supported upon and extending up ⁇ wardly from said tank, stationary contact means mounted upon the upper end of said insulator, a ⁇
  • a tank for storing gas under pressure a straight hollow insulator supported substantially vertically by said tank, stationary contact means mounted on the free end of said insulator, a coacting contact movable across the open end of said hollow in-4 sulator to establish an varc generally at right angles to the longitudinal axis of said hollow insulator, operating means for moving said mov-v able contact to open and closed circuit positions, a valve disposed at the juncture of said hollow insulator with the tank for controlling the ilow of gas thereinto from said tank, and means for operating said valve to open and closed positions.
  • a tank for storing gas under pressure a straight tubular insulator mounted from said tank, a stationary contact supported bythe free end of said insulator and to one side ofthe open end thereof, a terminal member supported intermediate the ends of said insulator, a movable contact hinged to said terminal member for swinging movement A to open and closed circuit position, said moving contact having la portion movable across the open end of said insulator in a path generally perpendicular to the longitudinal axis of said insulator, means for operating said movable contact tor open circuit position to establish an arc across the open end of said insulator, and means foradmitting a blast of gas from said tank into said insulator to extinguish the arc.
  • a tank for storing gas under pressure a tubular insulator mounted substantially vertically upon said tank, a stationary contact supported upon the upper end of said insulator and to one side of the open end thereof, a terminal member supported intermediate the endsr of said insulator, a movable bridging contact member hinged to said terminal member for swinging movement into and out of engagement with said stationary contact,
  • said bridging member having a contact portion movable across the open end of said insulator in a path at substantially a right angle to the axis of the passage through the insulator, an arc ⁇ chute vertically mounted over the free end of said tubular insulator for confining said/arc, and means for causing a blast of gas to flow from said tank through said tubular insulator to extinguish said arc, said blast of gas nowing in substantially a straight line from said tank through said tubular insulator. across the arc and into said arc chute.
  • a tank for storing gas under pressure, a plurality of tubular insulators mounted from said tank, separable contact means for drawing an arc adjacent the open end of each of said insulators, said tubular insulators providing direct paths for the flow of individual blasts of gas from said tank to said arcs, operating means for actuating said separable contact means, individual valve means for each path, and single means for simultaneously actuating said individual valve means for controlling the flow of gas in each of saidpaths and to provide a unlform ow of gas to all of said arcs.
  • a tank for lstoring gas under pressure a plurality of tubular insulators mounted from said tank, separable contact means for drawing an arc across the open end of each of said insulators, said tubular insulators providing straight paths for the flow of individual blasts of gas from said tank to said arcs, operating means including a rock shaft for actuating said separable contact means, said rock shaft being supported for rockgas under pressure, separable contacts for mak ing and breaking the connected circuit, a pressure actuated operating means for said contacts including a cylinder, a piston movable in said cylinder, a contact opening valve operable for admitting gas from said tank to'said cylinder to actuate said piston and cause said contacts to, be opened, a contact closing valve operable for admitting gas from said tank to said cylinder to actuate said piston and cause said contactsto be' closed, said opening and closing valves being secured to said cylinder to form a unit assembly,
  • conduit means joining said' tank withsaid valves, said conduit means serving as the sole support for said unit assembly.
  • a source' of gas under pressure separable contacts for establishing .an arc, operating means for actuat- ,”'ing said contacts to open and closed circuit positions, valve means for controlling the ilow of gas from said source through the arc, and cam means'carried by said operating means and a follower movable over the face of the cam for actuating said valve means, said cam means hav- .ing said face on which the follower is movable collapsible during movement in one direction to portion to the collapsed position during movement of said contact operating means to the closed circuit position to actuate said valve means in a diierent manner.
  • a multi-phase gas blast circuit interrupter a plurality of pairs of separable con-l tacts, a plurality of arc chambers each of which receives the arc drawn upon separation of one of said pairs oi' contacts, a common tank for holding sas under pressure for extinguishing all ofI said arcs, a pluralityl of separate conduits each of which extends directly from said common tankto one of said aro chambers to provide an individual blast of gas from said tank to extinguish the arc drawn by one of said plurality of pairs of contacts, a plurality of blast valves each of which controls the blast of gas through one of said plurality of separate conduits, and means for jointly operating said plurality of blast valves upon separation of said plurality of pairs of contacts.
  • a multi-phase gas blast circuit interrupter a plurality of pairs of separable contacts, a plurality of arc chambers each of which receives the arc drawn upon separation of one of said pairs of contacts, a common tank for holding gas under pressure for extinguishing all of said arcs, a plurality of separate conduits each of which extends directly from, said common tank to one of said arc chambers to provide an individual blast of gas from said tank to extinguish the arc drawn by one of said plurality of pairs open said valve means only during the opening lish an arc, operating means for actuatingsaid contacts to open and closed circuit positions, valve means for admitting a blastl of gas from saidtank to said contacts, valve operating means associated with said contact operating means, said valve operating means including a cam having a collapsible portion and a follower movable over the face of said collapsible portion for actuating said valve means, means biasing and holding said collapmble portion in said extended position during movement of said contact operating means
  • tank means for storing gas under pressure, a plurality of tubular insulators extending from said tank-means.
  • separable contact means f or drawing an arc adjacent the open end of each of said insulators, said tubular insulators providing direct paths for the iiow of individual blasts of gas from said tank means to said arcs.
  • operating means for actuating said separable contact means, individual valve means for each p'ath, a common valve opening means mechanically driven from said operating means for siof said paths.

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  • Circuit Breakers (AREA)
US313745A 1940-01-13 1940-01-13 Circuit interrupter Expired - Lifetime US2282154A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
BE483534D BE483534A (de) 1940-01-13
US313745A US2282154A (en) 1940-01-13 1940-01-13 Circuit interrupter

Applications Claiming Priority (1)

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US313745A US2282154A (en) 1940-01-13 1940-01-13 Circuit interrupter

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US2282154A true US2282154A (en) 1942-05-05

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2428482A (en) * 1945-02-28 1947-10-07 Westinghouse Electric Corp Circuit interrupter
US2428575A (en) * 1943-07-10 1947-10-07 Westinghouse Electric Corp Circuit interrupter
US2456965A (en) * 1944-12-05 1948-12-21 Westinghouse Electric Corp Valve
US2542650A (en) * 1946-06-13 1951-02-20 Asea Ab Arrangement in electrical air blast circuit breakers
US2671146A (en) * 1952-01-14 1954-03-02 Gen Electric Interrupting unit for electric circuit breakers
US2711460A (en) * 1952-02-05 1955-06-21 Gen Electric Support structure for gas blast circuit breaker
US2739206A (en) * 1952-11-19 1956-03-20 Westinghouse Electric Corp Circuit breaker blast-valve mechanism

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2428575A (en) * 1943-07-10 1947-10-07 Westinghouse Electric Corp Circuit interrupter
US2456965A (en) * 1944-12-05 1948-12-21 Westinghouse Electric Corp Valve
US2428482A (en) * 1945-02-28 1947-10-07 Westinghouse Electric Corp Circuit interrupter
US2542650A (en) * 1946-06-13 1951-02-20 Asea Ab Arrangement in electrical air blast circuit breakers
US2671146A (en) * 1952-01-14 1954-03-02 Gen Electric Interrupting unit for electric circuit breakers
US2711460A (en) * 1952-02-05 1955-06-21 Gen Electric Support structure for gas blast circuit breaker
US2739206A (en) * 1952-11-19 1956-03-20 Westinghouse Electric Corp Circuit breaker blast-valve mechanism

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Publication number Publication date
BE483534A (de)

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