US3914569A - Puffer interrupter with downstream initiated arc - Google Patents

Puffer interrupter with downstream initiated arc Download PDF

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Publication number
US3914569A
US3914569A US466408A US46640874A US3914569A US 3914569 A US3914569 A US 3914569A US 466408 A US466408 A US 466408A US 46640874 A US46640874 A US 46640874A US 3914569 A US3914569 A US 3914569A
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US
United States
Prior art keywords
nozzle
movable
contact
movable contact
operating rod
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
US466408A
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English (en)
Inventor
Lorne D Mcconnell
Hansruedi Aumayer
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.)
ABB Inc USA
Original Assignee
ITE Imperial Corp
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 ITE Imperial Corp filed Critical ITE Imperial Corp
Priority to US466408A priority Critical patent/US3914569A/en
Priority to CA216,189A priority patent/CA1038428A/fr
Application granted granted Critical
Publication of US3914569A publication Critical patent/US3914569A/en
Priority to CA293,244A priority patent/CA1042040A/fr
Assigned to BROWN BOVERI ELECTRIC INC.; A CORP OF DE reassignment BROWN BOVERI ELECTRIC INC.; A CORP OF DE ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: I-T-E IMPERIAL CORPORATION
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • H01H33/91—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 air or gas

Definitions

  • Patent r; ig--4- 1 z I I PUFFER INTERRUPTER WITH DOWNSTREAM I INITIATED ARC BACKGROUND OF THE INVENTION This invention relates to puffer type circuit interrupters, and more specifically relates to a novel arrangement whereby the movable contact of a puffer type interrupter is flexibly connected to a gas directing nozzle so that the are between the separating interrupter contacts is initially drawn downstream of the nozzle, with the movable contact later returning to its preferred upstream position within the nozzle after the initial arcing operation.
  • Single pressure'SF type puffer interrupters are well known in the art and commonly comprise a pair of separable contacts which are contained within a sealed container filled with sulfur hexafluoride gas or the like.
  • One of the contacts is normally fixed to a nozzleshaped member which encloses the area of engagement between the two cooperating contacts.
  • the movable contact is connected to a piston andcylinder arrangement such that, when the movable contact moves to a disengaged position, the piston and cylinder force gas flow through the nozzle and through the region at which the contacts separate. This then provides a temporarily high-pressure region which moves gas through the arcing region to assist in the extinction of the are drawn between the separating contacts and to sweep the space between the separating contacts clear of ionized products.
  • the opening stroke of the movable contact must be sufficient toestablish an open gap large enough to withstand the crest of the system recovery voltage
  • the opening stroke must develop a sufficient pressure differential across the nozzle to provide effective sweeping and deionization of the arc space.
  • the arc produces various types of arcing products and ionized gas in ,the region which is upstream of the nozzle so that these product's and ionized gases must be swept free :if interruption is to be obtained.
  • the arc and, heated gases produced by the arcare immediatelyadjacent to the nozzle andthe nozzle throat, thereby causing thermal deterioration of :the nozzle which can reduce the interrupting lifetime of the device.
  • a further disadvantage of the fixed positioningzof the movable contact upstream of the nozzle throat is that the initial arc which is drawn will cause a high-pressure zone in the nozzle throat which results in a back pressure which must be overcome by higher operating forces from the operating mechanism. Note further that the back pressure in the nozzle can result momentarily in a back flow of gas so that arc products could be brought into the puffer piston area.
  • the movable contact and the movable nozzle are movably connected to one another and the movable contact is normally biased to a preferred location slightly upstream of the nozzle throat.
  • the movable contact and nozzle move relative to one another so that the end of the movable contact is downstream of the nozzle throat at the time an arc is initiated between the separating contacts.
  • the movable contact returns to its preferred upstream location relative to the nozzle, when a sufficiently large open gap is formed'to withstand the crest of the system recovery voltage and enough pressure has developed to product effective are sweeping action.
  • the arrangement of the present invention permits release of energy during the initial arcing period in a region which is downstream of the nozzle, so that pressure release can be affected through the relatively open gap between the nozzle wall and the fixed contact as well as through the hollow fixed contact if such an arrangement is used.
  • the undesirable effects on the nozzle of upstream reverse flow and early contamination of the nozzle throat are largely overcome.
  • FIG. 1 is a cross-sectional view of a portion of an inte'rrupter which incorporates the present invention
  • FIG. 2 shows the interrupter of FIG. 1 immediately after the contacts have separated, with the separating contacts being downstream of the nozzle throat.
  • FIG. 3 shows the interrupter of FIGS. 1 and 2, with the contacts in their fully open position.
  • FIG. 4 shows a second embodiment of the invention in cross-sectional view wherein the stationary contact is fixed to the operating rod, while the nozzle is flexibly connected to the operating rod.
  • FIG. 5 shows the interrupter of FIG. 4 just after the contacts have separated, with the initial are being formed at a location downstream of the nozzle throat.
  • FIG. 6 shows the embodiment of FIGS. 3 and 4 after the contacts are fully opened and the nozzle is retracted to effect a greater open gap distance.
  • FIGS. 1, 2 and 3 there is shown a portion of a puffer breaker which includes a stationary conductive piston 10 which can be connected to a first terminal 11 of the breaker.
  • the member 10 may be contained within a suitable housing shown schematically by the dotted block 12, which is filled with sulfur hexafluoride at some positive pressure. Other gases and gas mixtures could also be used if desired.
  • a conductive operating rod 13 then terminates in an enlarged head 14 which may be segmented if desired, and is in sliding engagement-with movable contact cylinder 15.
  • the movable contact cylinder 15 may be segmented into fingers at its right-hand end, where the fingers engage the stationary tubular contact 16.
  • Operating rod 13 is then electrically connected to the stationary conductive member 10 by suitable sliding contact members 17.
  • the conductive member 15 may then terminate in an annular disk-shaped end region 18 and may have arcing contact finger type elements 19 at its right-hand end which engage the arcing contact end of stationary contact 16. Movable contact 15 is then supported within an insulation cup 20 which extends from disk 21 which is fixed to the interior of the bafi'le cylinder or nozzle 22.
  • the baffle cylinder 22 then consists of a cylindrical body 23 having a restricted nozzle throat 24 where baffle cylinder 23 is slidable on the stationary member 10 which serves as a stationary piston for the puffer interrupter.
  • the disk 21 then has a plurality of openings including openings 25 and 26 therein which permit the flow of gas from the volume between disk 21 and member 10 to flow to the right and through the nozzle throat 24 when the circuit breaker is opened as will be later described.
  • a sliding seal 30 may be provided between stationary member 10 and cylindrical portion 23 of nozzle 22 if desired.
  • a biasing spring is then captured within insulation cup 20 and biases contact cylinder 15 to the left and into its seat in the plate 21. Note that the movable components of the breaker are all connected to one another and consist of the operating rod 13, plate 21 and baffle 22. These components move as a single unit when operating forces are applied to the operating rod 13.
  • the contacts are shown in their normally closed position in FIG. 1.
  • the operating rod 13 In order to open the breaker, the operating rod 13 is moved to the left.
  • the initial movement of operating rod 13 and of disk 21 and nozzle 22 to the left is independent of-the. movement of ,contact 15 which is held in "position sincethejfrictional engagement forces between inwardly turned contact end 19 and the stationary contact 16 are greater than the initial force from spring 35-.
  • the puffer interrupter consists of a fixed puffer piston 50 which may be of conductive material and which slidably receives a puffer cylinder 51 which is fixed to the movable contact operating rod 52 by the plate 53.
  • plate 53 is similar to plate 21 of FIGS. 1, 2 and 3 and contains suitable openings,'such as openings 54 and 55 which permit the flow of gas into the interrupting area upon the movement of the pufi'er cylinder 51 to the left.
  • the moving contact rod 52 may then be electrically connected to the conductive piston 50 by transfer contacts 56 and one terminal of the breakermay be connected tothefpuffer piston 50 andis shown as the terminal 57.
  • the right-hand end of the contact operating rod 52 then carries a segmented movable contact member 60 whichcooperates with a stationary contact tube 61 which defines the, second terminal 62 of the breaker.
  • nozzle '63 which is flexibly carried on the puffer cylinder by the compression spring 70.which.- is disposed between the inwardly tumed flange 71 of cylinder 51 and the outwardly turned flange 72of nozzle 63.
  • nozzle 63 like nozzle 22 of FIGS. 1 2 and 3, is of any desired insulation material.
  • the operating rod 52 is initially moved to the left from the position of FIG. 4 toward the position of FIG. 5.
  • the movable operating rod 52, plate 53, cylinder 51 and nozzle 63 move as a unit to the left and the throat of the nozzle 63 moves with contact fingers 60.
  • the major portion of the nozzle throat is generally downstream of the contact region at which initial arcing will take place when the position of FIG. 2 is reached.
  • the contact 60 is substantially blocking gas flow through the nozzle 63, thus promoting early build-up of pressure upstream of the contacts.
  • a puffer type circuit interrupter including a stationary elongated contact; a movable contact movable between an engaged and disengaged position with said stationary contact; an insulation nozzle surrounding said movable and stationary contacts, an operating rod connected to said nozzle and to said movable contact, a pistoncylinder means connected to said operating rod for producing a flow of gas through said nozzle and through the arc space produced by the separation of said movable and stationary contacts; a housing surrounding said contacts, said nozzle, and said pistoncylinder means and filled with a relatively high dielectric gas; said nozzle having an internal nozzle throat restriction; said nozzle and said movable contact being movable relative to one another; and biasing means normally biasing said nozzle and said movable contact to a position wherein the end of said movable contact is downstream of said nozzle throat restriction; and
  • a puffer type circuit interrupter including a stationary elongated contact; a movable contact movable between an engaged and disengaged position with said stationary contact; an insulation nozzle surrounding said movable and stationary contacts, an operating rod connected to said nozzle and to said movable contact, a pistoncylinder means connected to said operating rod for producing a flow of gas through said nozzle and through the arc space produced by the separation of said movable and stationary contacts; a housing surrounding said contacts, said nozzle, and said pistoncylinder means and filled with a relatively high dielectric gas; said nozzle having an internal nozzle throat restriction; said nozzle and said movable contact being movable relative to one another; and biasing means normally biasing said nozzle and said movable contact to a position wherein the end of said movable contact is downstream of said nozzle throat restriction; and means for moving said end of said movable contact downstream of said nozzle throat restriction at a time following the initial movement of said movable contact to its disengaged position, where

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  • Circuit Breakers (AREA)
US466408A 1974-05-02 1974-05-02 Puffer interrupter with downstream initiated arc Expired - Lifetime US3914569A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
US466408A US3914569A (en) 1974-05-02 1974-05-02 Puffer interrupter with downstream initiated arc
CA216,189A CA1038428A (fr) 1974-05-02 1974-12-17 Disjoncteur a soufflage d'arc
CA293,244A CA1042040A (fr) 1974-05-02 1977-12-16 Interrupteur a soufflage dont l'arc est descendant

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US466408A US3914569A (en) 1974-05-02 1974-05-02 Puffer interrupter with downstream initiated arc

Publications (1)

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US3914569A true US3914569A (en) 1975-10-21

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US (1) US3914569A (fr)
CA (1) CA1038428A (fr)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4103130A (en) * 1975-01-29 1978-07-25 Westinghouse Electric Corp. Resistor applications for high-power circuit breakers
JPS5461259U (fr) * 1977-10-07 1979-04-27
US4556767A (en) * 1983-05-31 1985-12-03 Bbc Brown, Boveri & Company, Ltd. Gas-blast circuit breaker
FR2762925A1 (fr) * 1997-05-02 1998-11-06 Gec Alsthom T & D Sa Disjoncteur a haute tension a double mouvement des contacts d'arc
CN100501893C (zh) * 2004-12-06 2009-06-17 日本Ae帕瓦株式会社 喷吹式气体断路器的电流切断方法及其所使用的喷吹式气体断路器
EP2237301A1 (fr) * 2009-04-03 2010-10-06 Areva T&D Sas Chambre de coupure de courant à contact mobile et buse de soufflage mobile manoeuvrés indépendamment, interrupteur by pass HVDC et sous station de conversion HVDC comprenant une telle chambre
US20130119022A1 (en) * 2010-03-09 2013-05-16 Alstom Technology Ltd. Medium and high-voltage electric switch with return on closure and an insertion device for inserting a resistance
CN104220209A (zh) * 2012-04-04 2014-12-17 乔治洛德方法研究和开发液化空气有限公司 具有改进的外部轮廓的可动元件的激光喷嘴

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3739125A (en) * 1972-04-27 1973-06-12 Gen Electric Puffer type gas blast circuit breaker
US3769479A (en) * 1972-04-28 1973-10-30 Westinghouse Electric Corp Puffer-type compressed-gas circuit interrupter with double-flow action
US3829641A (en) * 1970-03-19 1974-08-13 Siemens Ag Puffer-type electric switch

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3829641A (en) * 1970-03-19 1974-08-13 Siemens Ag Puffer-type electric switch
US3739125A (en) * 1972-04-27 1973-06-12 Gen Electric Puffer type gas blast circuit breaker
US3769479A (en) * 1972-04-28 1973-10-30 Westinghouse Electric Corp Puffer-type compressed-gas circuit interrupter with double-flow action

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4103130A (en) * 1975-01-29 1978-07-25 Westinghouse Electric Corp. Resistor applications for high-power circuit breakers
JPS5461259U (fr) * 1977-10-07 1979-04-27
US4556767A (en) * 1983-05-31 1985-12-03 Bbc Brown, Boveri & Company, Ltd. Gas-blast circuit breaker
FR2762925A1 (fr) * 1997-05-02 1998-11-06 Gec Alsthom T & D Sa Disjoncteur a haute tension a double mouvement des contacts d'arc
CN100501893C (zh) * 2004-12-06 2009-06-17 日本Ae帕瓦株式会社 喷吹式气体断路器的电流切断方法及其所使用的喷吹式气体断路器
FR2944135A1 (fr) * 2009-04-03 2010-10-08 Areva T & D Sa Chambre de coupure de courant a contact mobile et buse de soufflage mobile manoeuvres independamment, interrupteur by pass hvdc et sous station de conversion hvdc comprenant une telle chambre.
EP2237301A1 (fr) * 2009-04-03 2010-10-06 Areva T&D Sas Chambre de coupure de courant à contact mobile et buse de soufflage mobile manoeuvrés indépendamment, interrupteur by pass HVDC et sous station de conversion HVDC comprenant une telle chambre
CN101901721A (zh) * 2009-04-03 2010-12-01 法国阿海珐集团输配电自动中心 中断室、hvdc旁路中断器,和具有此室的高压直流换流变电站
CN101901721B (zh) * 2009-04-03 2015-01-07 阿尔斯通技术有限公司 中断室、hvdc旁路中断器,和具有此室的高压直流换流变电站
US20130119022A1 (en) * 2010-03-09 2013-05-16 Alstom Technology Ltd. Medium and high-voltage electric switch with return on closure and an insertion device for inserting a resistance
US8952285B2 (en) * 2010-03-09 2015-02-10 Alstom Technology Ltd. Medium and high-voltage electric switch with return on closure and an insertion device for inserting a resistance
CN104220209A (zh) * 2012-04-04 2014-12-17 乔治洛德方法研究和开发液化空气有限公司 具有改进的外部轮廓的可动元件的激光喷嘴
CN104220209B (zh) * 2012-04-04 2016-12-28 乔治洛德方法研究和开发液化空气有限公司 具有改进的外部轮廓的可动元件的激光喷嘴

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Publication number Publication date
CA1038428A (fr) 1978-09-12

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Legal Events

Date Code Title Description
AS Assignment

Owner name: BROWN BOVERI ELECTRIC INC.; SPRING HOUSE, PA. 1947

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:I-T-E IMPERIAL CORPORATION;REEL/FRAME:004103/0790

Effective date: 19820428