EP0795883A1 - Lastschalter mit reduzierter Kompression - Google Patents

Lastschalter mit reduzierter Kompression Download PDF

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Publication number
EP0795883A1
EP0795883A1 EP97400450A EP97400450A EP0795883A1 EP 0795883 A1 EP0795883 A1 EP 0795883A1 EP 97400450 A EP97400450 A EP 97400450A EP 97400450 A EP97400450 A EP 97400450A EP 0795883 A1 EP0795883 A1 EP 0795883A1
Authority
EP
European Patent Office
Prior art keywords
tube
slot
circuit breaker
piston
longitudinal axis
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.)
Withdrawn
Application number
EP97400450A
Other languages
English (en)
French (fr)
Inventor
Renaud David
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.)
Grid Solutions SAS
Original Assignee
GEC Alsthom T&D SA
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 GEC Alsthom T&D SA filed Critical GEC Alsthom T&D SA
Publication of EP0795883A1 publication Critical patent/EP0795883A1/de
Withdrawn legal-status Critical Current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
    • H01H33/70—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
    • H01H33/905—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 compression volume being formed by a movable cylinder and a semi-mobile piston
    • 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
    • H01H33/901—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 making use of the energy of the arc or an auxiliary arc

Definitions

  • the present invention relates to a circuit breaker with reduced self-compression.
  • a circuit breaker of the self-blowing type comprising a casing filled with a dielectric gas under pressure, two arcing contacts cooperating with each other, at least one forming part of a movable contact assembly integral with '' an actuator and adapted to be moved axially in the envelope between a closed position and an open position and vice versa, the movable contact assembly being constituted by a first tube carrying at its end the arcing contact mobile and a second tube coaxial with the first tube to delimit, on either side of a crown connecting the first and the second tubes, an expansion chamber with constant volume closed by a blowing nozzle and a communicating compression chamber with the expansion chamber and closed by a semi-mobile piston, the second tube sliding in a fixed tube and the circuit breaker comprising means for immobilizing the piston during a first part of the d displacement of the movable contact assembly between the closed position and the position of opening and axial displacement of the piston during a second part of this same displacement of the movable contact assembly and
  • a first means for axially displacing the piston which is constituted by a drive member integral with the movable contact assembly which drives a stop integral with the piston during the second part of the displacement of the assembly movable contact, this stop being disposed on the path of the drive member.
  • the piston is connected to a third tube provided with at least one light in which slides a finger secured to the first tube and which extends radially with respect to the latter in the direction of the second tube.
  • a second means for immobilizing the piston is constituted by a spring disposed between the drive member and the piston and by a fixed retaining member cooperating with the piston.
  • the spring biasing the semi-mobile piston causes a permanent force on the control rod and causes an increase in the operating energy required.
  • the object of the invention is to provide a circuit breaker with low operating energy thanks to a particular arrangement of said means, which also has the advantage of being compact.
  • the arrangement according to the invention results in a reduced increase in weight on the mobile assembly and does not include either a spring or a link. Maneuvering energy necessary is therefore only slightly increased compared to a fixed piston circuit breaker.
  • the arrangement in accordance with the invention moreover achieves a precise and straightforward positioning of the semi-movable piston without recoil phenomenon as it appears in spring arrangements.
  • connection arrangement consists of at least one retractable ball carried by the piston and cooperating with a shoulder carried by the first tube.
  • connection arrangement consists of a lug carried by the piston and engaging with a notch made in the second tube, said slots being of form arranged to achieve relative rotation of the second tube and of the piston at the end of said first part of the movement.
  • the fixed tube and the blocking tube comprises a plurality of first and second slots, the second tube and the piston carrying a corresponding number of studs.
  • Figure 1 is a longitudinal sectional view of a circuit breaker according to the invention according to a first embodiment.
  • FIGS. 2A to 2C are partial views of this circuit breaker, during an opening.
  • Figure 3 is a partial cross-sectional view of this circuit breaker in the closed position.
  • Figure 4 is a longitudinal sectional view of a circuit breaker according to the invention according to a second embodiment.
  • FIGS. 5A to 5C are partial views of this circuit breaker, during an opening.
  • FIGS. 6A to 6C are corresponding partial views in cross section of this circuit breaker.
  • FIG. 1 A first embodiment of the invention is shown in Figure 1.
  • the circuit breaker shown in the figures comprises, in a conventional manner, a casing, for example an insulator 1 filled with a dielectric gas under pressure, two arcing contacts 3A, 7A cooperating with each other, at least one being part of an assembly mobile contact secured to an operating member 6 and adapted to be moved axially in the casing 1 between a closed position and an open position and vice versa, the mobile contact assembly being constituted by a first tube 7 carrying at its end the movable arcing contact 7A and a second tube 8 coaxial with the first tube 7 to delimit, on either side of a ring 9 connecting the first and the second tubes, an expansion chamber 17 at volume constant closed by a blowing nozzle 10 and a compression chamber 18 communicating via a one-way valve 2 with the expansion chamber and closed by a semi-movable piston 11.
  • a casing for example an insulator 1 filled with a dielectric gas under pressure
  • the circuit breaker may also include a fixed permanent contact 14 cooperating with a movable permanent contact 8A carried by the second tube 8.
  • the second tube 8 slides in a fixed tube 20, 20A formed for the purpose of mounting two tubes secured by screwing and fixed by a flange 20B to a bottom plate 21 of the circuit breaker.
  • the circuit breaker also includes an arrangement for connecting the second tube 8 and the piston 11 during the second part of the opening movement and when it is closed.
  • This connection arrangement consists of at least one retractable ball 29 carried by the piston 11 and cooperating with a shoulder 30 carried by the first tube 7. This ball 29 is pushed against the first tube 7 by a spring 33 housed in an arm carried by the piston 11.
  • the circuit breaker includes means for immobilizing the piston during a first part of the movement of the movable contact assembly between the closed position and the open position and axial displacement of the piston during a second part of this same movement of the mobile contact assembly.
  • the second tube 8 carries at its end opposite the contacts of the arms 8B, for example three, distributed around its perimeter and each carrying on the one hand a lug 27 intended to be introduced into the first slots 22 and 25 produced respectively on the fixed tube 20 and on the locking tube 24.
  • the piston 11 comprises an annular compression part 11A and arms 11B, for example three, distributed around the perimeter of the annular part 11A and each carrying a pin 28 intended to be introduced into the second slots 23 and 26 respectively formed on the tube fixed 20 and on the locking tube 24.
  • Said slots are of form arranged to immobilize the piston 11 during said first part displacement and axial displacement of the piston 11 during said second part of this same displacement.
  • FIGS. 2A to 2C FIGS. 2A to 2C, FIG. 3 being a partial view in cross section, in line with each stud 27, 28 corresponding to the closed position of the circuit breaker.
  • FIGS. 2A and 3 the circuit breaker is closed; in FIG. 2B, the contacts have carried out said first part of displacement; in FIG. 2C, the contacts have carried out said second part of displacement and are in the open position.
  • the first slot 22 of the fixed tube 20 is rectilinear and parallel to the longitudinal axis of the circuit breaker and the first slot 25 of the blocking tube 24 consists of two rectilinear sections, parallel to the longitudinal axis of the circuit breaker and connected by an inclined section .
  • the second slot 23 of the fixed tube 20 is shorter and consists of a rectilinear section, parallel to the longitudinal axis of the circuit breaker and the second slot 26 of the blocking tube 24 consists of a rectilinear section, parallel to the longitudinal axis of the circuit breaker and widened by a lateral inclined end section.
  • the tenon 27 carried by the second tube 8 is disposed near the end of the first slots 22, 25.
  • the tenon 28 is in turn disposed at the end of the section longitudinal of the second slot 23 of the fixed tube 20 and in the inclined section of the second slot 26 of the locking tube 24.
  • the tenon 27 continues its translation and taking into account the inclined section of the first slot 25 of the locking tube 24, the latter is rotated thus releasing the tenon 28 of the piston 11 which can in correspondence move in the second slot 26 of the second tube 8, which initiates a relative movement of the piston 11 to the right (seen according to FIG. 1), without relative rotation of the second tube 8 and of the piston 11.
  • the lug 28 of the piston 11 enters in the longitudinal section of the second slot 26 of the locking tube 24.
  • the shoulder 30 joins the ball 29 which snaps to the left of the shoulder 30 (seen according to FIG. 1).
  • the second tube 8 with the piston 11 continues its opening stroke to reach the opening position shown in Figure 2C.
  • the pin 27 of this tube 8 moves in the first slots 22, 25 then longitudinal and superimposed and the pin 28 of the piston 11 moves in the second slots 23, 26 then longitudinal and superimposed.
  • the second tube 8 and the piston 11 are integral.
  • the fixed tube 20 and the locking tube 24 has a plurality of first and second slots 22, 23, 25, 26, the second tube 8 and the piston 11 carrying a corresponding number of pins 27, 28 as seen above.
  • FIG. 4 A second embodiment of the invention is shown in FIG. 4.
  • connection arrangement of the second tube 8 and of the piston 11 when it is closed is no longer produced by a retractable ball system 29, here deleted, but by a conformation arms 8B, 11B intended to secure the second tube 8 and the piston 11 being opened more precisely at the start of said second part of movement, by means of a lug 31 carried by the arms 11B of the piston 11 and engaging with a notch 32 made in the arms 8B of the second tube 8.
  • the second tube 8 carries at its end opposite the contacts the arms 8B, for example three, distributed around its perimeter and each carrying on the one hand the pin 27 intended to be introduced into the first slots 22 and 25 produced respectively on the fixed tube 20 and on the locking tube 24 and on the other hand a notch 32 intended to come to cooperate with a lug 31 produced on the arms 11B of the piston 11 during opening.
  • the piston 11 comprises the annular compression part 11A and the arms 11B, for example three, distributed around the perimeter of the annular part 11A and each carrying the pin 28 intended to be introduced into the second slots 23 and 26 respectively formed on the tube fixed 20 and on the locking tube 24 and on the other hand the lug 32.
  • Said slots are of a shape designed to immobilize the piston 11 during said first part of the movement and the axial movement of the piston 11 with the movable assembly during said second part of this same movement thanks to the connection of the piston 11 with the second tube 8 being opened.
  • FIGS. 5A to 5C the slots are shaped as shown in FIGS. 5A to 5C, FIGS. 6A to 6C representing partial views in corresponding cross section, in line with each stud 27, 28.
  • FIGS. 5A and 6A the circuit breaker is closed; in FIGS. 5B and 6B, the contacts have carried out said first part of displacement; in FIGS. 5C and 6C, the contacts have carried out said second part of displacement and are in the open position.
  • the first slot 22 of the fixed tube 20 is rectilinear and parallel to the longitudinal axis of the circuit breaker and the first slot 25 of the blocking tube 24 consists of two rectilinear sections, parallel to the longitudinal axis of the circuit breaker and connected by an inclined section .
  • the second slot 23 of the fixed tube 20 is shorter and consists of a rectilinear section, parallel to the longitudinal axis of the circuit breaker and widened by a lateral inclined end section and the second slot 26 of the blocking tube 24 is constituted a straight section, parallel to the longitudinal axis of the circuit breaker.
  • the tenon 27 carried by the second tube 8 is disposed near the end of the first slots 22, 25.
  • the tenon 28 is in turn disposed at the end of the section longitudinal of the second slot 26 of the second tube 8 and in the inclined section of the second slot 23 of the fixed tube 20.
  • the tenon 27 continues its translation and taking into account the inclined section of the first slot 25 of the locking tube 24, the latter is rotated thus releasing the tenon 28 of the piston 11 which can in correspondence move in the second slot 26 of the second tube 8, which initiates a relative displacement of the piston 11 to the right (seen according to FIG. 1), with relative rotation of the second tube 8 and of the piston 11.
  • the tenon 28 of the piston 11 enters in the longitudinal section of the second slot 23 of the fixed tube 20.
  • the second tube 8 with the piston 11 continues its opening stroke to reach the opening position shown in Figure 5C.
  • the pin 27 of this tube 8 moves in the first slots 22, 25 then longitudinal and superimposed and the pin 28 of the piston 11 moves in the second slots 23, 26 then longitudinal and superimposed.
  • the pins 31 drive the piston 11 by the movable assembly during the closing movement of the circuit breaker.

Landscapes

  • Circuit Breakers (AREA)
EP97400450A 1996-03-11 1997-02-27 Lastschalter mit reduzierter Kompression Withdrawn EP0795883A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9603033 1996-03-11
FR9603033A FR2745947B1 (fr) 1996-03-11 1996-03-11 Disjoncteur a autocompression reduite

Publications (1)

Publication Number Publication Date
EP0795883A1 true EP0795883A1 (de) 1997-09-17

Family

ID=9490056

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97400450A Withdrawn EP0795883A1 (de) 1996-03-11 1997-02-27 Lastschalter mit reduzierter Kompression

Country Status (3)

Country Link
US (1) US5780799A (de)
EP (1) EP0795883A1 (de)
FR (1) FR2745947B1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2770681A1 (fr) * 1997-10-30 1999-05-07 Alsthom Gec Disjoncteur a piston semi-mobile et a haut pouvoir de coupure de courants capacitifs

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BR9807492B1 (pt) * 1997-01-17 2011-06-28 interruptor de potência de alta-tensão com um eletrodo de campo deslocável axialmente.
FR2767221B1 (fr) * 1997-08-11 1999-09-10 Gec Alsthom T & D Sa Disjoncteur a auto-soufflage et a compression reduite
US6429393B1 (en) * 1999-11-13 2002-08-06 S&C Electric Co. Current transfer arrangement for circuit interrupter
FR2902923B1 (fr) * 2006-06-23 2008-09-19 Areva T & D Sa Actionnement par came cylindrique d'un disjoncteur sectionneur d'alternateur
DE102006031219A1 (de) * 2006-06-30 2008-01-10 Siemens Ag Leistungsschalter mit einem Gehäuse
FR2906642B1 (fr) * 2006-09-29 2008-12-19 Areva T & D Sa Actionnement par came cylindrique des contacts d'une chambre de coupure a double mouvement.
FR2985081B1 (fr) 2011-12-21 2015-03-06 Alstom Technology Ltd Dispositif de protection contre les particules engendrees par un arc electrique de commutation
FR2996352B1 (fr) 2012-10-02 2014-10-31 Alstom Technology Ltd Dispositif de contact electrique de type doigt de contact a fort courant nominal

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3201646A1 (de) * 1982-01-18 1982-12-16 Ernst Prof. Dr.techn.habil. 1000 Berlin Slamecka Steuerbare impuls-kompressionseinrichtung fuer hochspannungs-druckgasschaltkammern
CH667943A5 (en) * 1985-07-16 1988-11-15 Sprecher Energie Ag Pressurised gas switch mechanism - has non-linear drive coupling between drive rod and piston-cylinder device for arc extinction gas jet
FR2696274A1 (fr) * 1992-09-29 1994-04-01 Alsthom Gec Disjoncteur à haute tension à auto-soufflage ayant une chambre de coupure à compression de gaz réduite.

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3201646A1 (de) * 1982-01-18 1982-12-16 Ernst Prof. Dr.techn.habil. 1000 Berlin Slamecka Steuerbare impuls-kompressionseinrichtung fuer hochspannungs-druckgasschaltkammern
CH667943A5 (en) * 1985-07-16 1988-11-15 Sprecher Energie Ag Pressurised gas switch mechanism - has non-linear drive coupling between drive rod and piston-cylinder device for arc extinction gas jet
FR2696274A1 (fr) * 1992-09-29 1994-04-01 Alsthom Gec Disjoncteur à haute tension à auto-soufflage ayant une chambre de coupure à compression de gaz réduite.
EP0591039A1 (de) * 1992-09-29 1994-04-06 Gec Alsthom T Et D Sa Hochspannung selbst-Blaslastscharter mit Schnittkammer mit reduzierter Gaskompression

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2770681A1 (fr) * 1997-10-30 1999-05-07 Alsthom Gec Disjoncteur a piston semi-mobile et a haut pouvoir de coupure de courants capacitifs

Also Published As

Publication number Publication date
US5780799A (en) 1998-07-14
FR2745947A1 (fr) 1997-09-12
FR2745947B1 (fr) 1998-04-10

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