EP0240406A1 - Elektrischer autopneumatischer Druckgasschalter mit hoher dielektrischer Festigkeit - Google Patents

Elektrischer autopneumatischer Druckgasschalter mit hoher dielektrischer Festigkeit Download PDF

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Publication number
EP0240406A1
EP0240406A1 EP87400634A EP87400634A EP0240406A1 EP 0240406 A1 EP0240406 A1 EP 0240406A1 EP 87400634 A EP87400634 A EP 87400634A EP 87400634 A EP87400634 A EP 87400634A EP 0240406 A1 EP0240406 A1 EP 0240406A1
Authority
EP
European Patent Office
Prior art keywords
main
circuit
contacts
contact
circuit breaker
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.)
Granted
Application number
EP87400634A
Other languages
English (en)
French (fr)
Other versions
EP0240406B1 (de
Inventor
Raymond Soboul
Gérard Menou
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.)
Merlin Gerin SA
Original Assignee
Merlin Gerin 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 Merlin Gerin SA filed Critical Merlin Gerin SA
Publication of EP0240406A1 publication Critical patent/EP0240406A1/de
Application granted granted Critical
Publication of EP0240406B1 publication Critical patent/EP0240406B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • H01H33/91—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
    • 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
    • H01H33/02—Details
    • H01H33/24—Means for preventing discharge to non-current-carrying parts, e.g. using corona ring
    • 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
    • H01H33/02—Details
    • H01H33/04—Means for extinguishing or preventing arc between current-carrying parts
    • H01H33/12—Auxiliary contacts on to which the arc is transferred from the main contacts

Definitions

  • a known circuit breaker of the kind mentioned is described in French patents 2,441,916 and European patent 11542 of the applicant.
  • the insulating casing of the circuit breaker is elongated and is subdivided by a horizontal internal wall into two compartments superposed along the longitudinal axis.
  • the separation zone of the main contacts is arranged in the lower compartment, while the cut-off interval between the arcing contacts is located in the upper compartment.
  • Note in the middle area of the enclosure that the connection system of the fixed main contact is at the potential of the upper terminal, while the movable arcing contact juxtaposed laterally is brought to the potential of the lower bound.
  • the difference in potential generates a large electric field in this zone, capable of affecting the electrical insulation of the circuit breaker as a function of the value of the nominal voltage used.
  • the longitudinal offset of the separation zones of the main circuit and the arc circuit limits the performance and the dielectric strength of such a circuit breaker.
  • the object of the invention is to improve the dielectric strength of a self-blowing circuit breaker having a side-by-side arrangement of the main circuit and the arcing circuit inside the enclosure.
  • the circuit breaker according to the invention is characterized in that the sectioning zone formed between the main contacts when the main circuit is opened is arranged opposite the breaking interval located between the arcing contacts during the opening. of the auxiliary circuit, and that the fixed main contact and the fixed arcing contact are at the potential of one of the terminals, being arranged substantially at the same level on either side of the longitudinal axis of the envelope.
  • Such a distribution of the active parts inside the envelope improves the dielectric strength of the circuit breaker, since the contacts arranged opposite one another in the transverse direction have the same polarities.
  • An isolation screen can be inserted longitudinally between the cut-off interval and the sectioning area.
  • the circuit breaker is equipped with a self-blowing device having a piston cylinder compression assembly of the insulating gas, and a blowing nozzle coaxially surrounding the cut-off interval to ensure the extinction of the arc when opening the auxiliary circuit.
  • the cylinder of the self-blowing device constitutes said screen isolation between the respective contacts of the main circuit and the auxiliary circuit, the assembly being arranged in a first compartment of the envelope, separated from the second adjacent compartment by a fixed intermediate wall serving as support for said cylinder.
  • a pole of an electric circuit breaker 10 with self-blowing is housed in a sealed envelope 12 made of molded insulating material, filled with an electronegative insulating gas with high dielectric strength, in particular sulfur hexafluoride.
  • the casing 12 of elongated shape, made of epoxy resin, contains a main circuit 14 for passing the nominal current having a pair of main contacts 16, 18, one of which is movable, and an auxiliary circuit 20 for shunting the main circuit 14 having a pair of arcing contacts 22, 24, one of which is movable 24.
  • a pair of bushings 26, 28, offset from each other in the longitudinal direction, pass radially through the wall of the casing 12 to constitute an input terminal 30 and an output terminal 32 of the circuit breaker 10 pole.
  • the side wall of the insulating casing 12 comprises a pair of studs 34, 36, for fixing intended to mechanically secure the circuit breaker 10 to a metal support electrically connected to ground.
  • the studs 34, 36 are produced by molding with the insulating casing 12, of so as to project from the side wall situated opposite the bushings 26, 28.
  • the opposite open bottoms 38, 40 of the casing 12 are closed respectively by means of a lower cover 42 and an upper cover 44.
  • a molecular sieve 46 is housed inside the casing 12 in a cavity of the lower cover 42.
  • An external control mechanism (not shown) is mechanically coupled to a crank 48 wedged on a rotary shaft 50 passing through an orifice of the casing 12 with the interposition of a dynamic sealing system 52. Inside the casing 12, the shaft 50 is articulated to an insulating transmission rod 54 intended to drive the movable assembly of the pole of the circuit breaker 10. The passage opening of the rotary shaft 50 is disposed between the fixing stud 34 and the bottom 38 of the casing 12.
  • the movable main contact 18 of the main circuit 14 is pivotally mounted on an axis 56 carried by a first connection bar 58 connected to the lower bushing 26.
  • a kinematic linkage 60 with intermediate lever 61 mechanically connects the movable main contact 18 to a rod 62 for movable control in translation, having one end articulated to the insulating rod 54, and an opposite end carrying the movable arcing contact 24.
  • the rod 62 is conductive and is electrically connected to the lower bushing 26 by a flexible connecting conductor 64.
  • the kinematic link 60 transforms the rectilinear movement of the rod 62 into a pivoting movement of the movable main contact 18, the assembly being arranged to cause the separation of the main contacts 1 6, 18, before that of the arcing contacts 22, 24.
  • the pivoting movement of the movable main contact 18 is thus derived from the sliding movement of the rod 62 for controlling the movable arcing contact 24.
  • a self-blowing device 65 with piston 66 and cylinder 68 for compressing the gas is associated with the pair of arcing contacts 22, 24, and is actuated during the displacement of the control rod 62 to generate a pneumatic blowing of the arc pulled during the separation of the arcing contacts, 22, 24.
  • the movable piston 66 is secured to the rod 62 and carries a blowing nozzle 67 coaxially surrounding the arcing contacts 22, 24.
  • the fixed main contact 16 is connected by a second connection bar 70 to the upper bushing 28.
  • the fixed arcing contact is also connected to the upper bushing 28 by a link 72.
  • the main circuit 14 is arranged as a disconnector connected directly to the bushings 26, 28 by extending along a longitudinal trajectory directly adjacent and shorter than that of the auxiliary circuit 20 offset in the transverse direction.
  • the sectioning area 74 between the main fixed coqntacts 1 6 and mobile 18 of the main circuit 1 4 is located in the upper compartment 76 of the casing 12, opposite the cut-off interval 78 and the self-blowing device 65 of the auxiliary circuit 20.
  • the fixed main contact 1 6 is substantially at the same level as the adjacent fixed arcing contact 22, and the pivoting main contact 18 is separated laterally from the self-blowing device 16 by the partition insulating cylinder 68.
  • the upper compartment 76 is delimited from the lower compartment 80 by an insulating intermediate wall 82 supporting the cylinder 68.
  • the fixed wall 82 extends parallel to the covers 42, 44, and comprises a lumen 84 for passage of the sliding rod 62.
  • the cylinder 68 is positioned in the upper compartment 76, and its end 86 can be extended upwards, beyond the level of the fixed contacts 16, 22, so as to form an insulating screen fixed extending in the vicinity of the median plane between the cutoff interval 78 and the sectioning area 74.
  • the fixed main contact 16 and the fixed arcing contact 22 are at the potential of the upper terminal 32 and constitute two active parts of the same polarities, arranged opposite one another. It is the same for the movable main contact 18 and the movable arcing contact 24, both brought to the potential of the lower terminal 30.
  • This distribution of the active parts inside the upper compartment 76 of the insulating casing 12 improves the dielectric strength of the circuit breaker, and prevents any internal ignition up to nominal voltages of the order of 40 kV.
  • the conductive rod 62 and the first connection bar 58 extend parallel in the lower compartment 80 on either side of the median plane, and are located at the potential of the lower terminal 30.

Landscapes

  • Circuit Breakers (AREA)
  • Arc-Extinguishing Devices That Are Switches (AREA)
EP87400634A 1986-04-03 1987-03-20 Elektrischer autopneumatischer Druckgasschalter mit hoher dielektrischer Festigkeit Expired - Lifetime EP0240406B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8605027A FR2596915B1 (fr) 1986-04-03 1986-04-03 Disjoncteur electrique a autosoufflage ayant une tenue dielectrique elevee
FR8605027 1986-04-03

Publications (2)

Publication Number Publication Date
EP0240406A1 true EP0240406A1 (de) 1987-10-07
EP0240406B1 EP0240406B1 (de) 1992-06-03

Family

ID=9334029

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87400634A Expired - Lifetime EP0240406B1 (de) 1986-04-03 1987-03-20 Elektrischer autopneumatischer Druckgasschalter mit hoher dielektrischer Festigkeit

Country Status (10)

Country Link
US (1) US4736079A (de)
EP (1) EP0240406B1 (de)
JP (1) JPS62237628A (de)
KR (1) KR950011296B1 (de)
CN (1) CN1014374B (de)
CA (1) CA1289606C (de)
DE (1) DE3779475D1 (de)
ES (1) ES2032841T3 (de)
FR (1) FR2596915B1 (de)
IN (1) IN169561B (de)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2650911B1 (fr) * 1989-08-09 1991-10-04 Alsthom Gec Disjoncteur a moyenne tension
US5258588A (en) * 1992-05-15 1993-11-02 Joslyn Corporation Puffer type switch high current electrical switch contact assembly
DE10317735B3 (de) * 2003-04-11 2004-11-18 Siemens Ag Erdungsschalter mit einem bewegbaren Kontaktstück
EP2523204B1 (de) * 2011-05-12 2019-09-04 ABB Schweiz AG Schaltungsanordnung und Verfahren zur Unterbrechung des Stromflusses in einem Gleichstrompfad
CN112038967B (zh) * 2020-08-25 2022-04-08 国核电力规划设计研究院有限公司 一种用电设备及其开关设备

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3257532A (en) * 1962-12-17 1966-06-21 Sprecher & Schuh Ag Arc-extinguishing circuit-breakers
EP0011542A1 (de) * 1978-11-14 1980-05-28 Merlin Gerin Leistungsschalter mit getrennten Leistungs- und Parallelstrombahnen
EP0053524A1 (de) * 1980-11-17 1982-06-09 Merlin Gerin Elektrischer Schalter mit Selbstblasung durch Lichtbogenrotation

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50158883A (de) * 1974-06-13 1975-12-23
JPS56152125A (en) * 1980-04-25 1981-11-25 Tokyo Shibaura Electric Co Breaker

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3257532A (en) * 1962-12-17 1966-06-21 Sprecher & Schuh Ag Arc-extinguishing circuit-breakers
EP0011542A1 (de) * 1978-11-14 1980-05-28 Merlin Gerin Leistungsschalter mit getrennten Leistungs- und Parallelstrombahnen
EP0053524A1 (de) * 1980-11-17 1982-06-09 Merlin Gerin Elektrischer Schalter mit Selbstblasung durch Lichtbogenrotation

Also Published As

Publication number Publication date
EP0240406B1 (de) 1992-06-03
ES2032841T3 (es) 1993-03-01
KR950011296B1 (ko) 1995-09-30
DE3779475D1 (de) 1992-07-09
FR2596915A1 (fr) 1987-10-09
JPS62237628A (ja) 1987-10-17
KR870010586A (ko) 1987-11-30
CN1014374B (zh) 1991-10-16
CN87102479A (zh) 1987-10-14
FR2596915B1 (fr) 1994-02-18
IN169561B (de) 1991-11-09
CA1289606C (en) 1991-09-24
US4736079A (en) 1988-04-05

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