EP0298809B1 - Disjoncteur à arc tournant et à expansion - Google Patents

Disjoncteur à arc tournant et à expansion Download PDF

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Publication number
EP0298809B1
EP0298809B1 EP88401529A EP88401529A EP0298809B1 EP 0298809 B1 EP0298809 B1 EP 0298809B1 EP 88401529 A EP88401529 A EP 88401529A EP 88401529 A EP88401529 A EP 88401529A EP 0298809 B1 EP0298809 B1 EP 0298809B1
Authority
EP
European Patent Office
Prior art keywords
contact
arcing
movable
circuit breaker
end plate
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
EP88401529A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0298809A1 (fr
Inventor
Georges Bernard
Raymond Bresson
Pierre Leclercq
Odile Filleau
François Scarponi
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 EP0298809A1 publication Critical patent/EP0298809A1/fr
Application granted granted Critical
Publication of EP0298809B1 publication Critical patent/EP0298809B1/fr
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
    • 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
    • H01H33/98—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being initiated by an auxiliary arc or a section of the arc, without any moving parts for producing or increasing the flow
    • H01H33/982—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being initiated by an auxiliary arc or a section of the arc, without any moving parts for producing or increasing the flow in which the pressure-generating arc is rotated by a magnetic field
    • 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
    • H01H33/70—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid
    • H01H33/98—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being initiated by an auxiliary arc or a section of the arc, without any moving parts for producing or increasing the flow

Definitions

  • the invention relates to an expanding circuit breaker with a rotating arc, having a sealed enclosure filled with a gas with high dielectric strength, in particular sulfur hexafluoride.
  • the document EP-A-0078719 also relates to a circuit breaker of the same kind as that of the document EP-A-240397 months, the structure of which is devoid of main contacts.
  • the present invention aims to allow the realization of a circuit breaker of a particularly simple structure and architecture allowing the separation of the conduction functions of the current and cutoff of the latter.
  • the main contacts comprise a fixed main contact and a movable main contact arranged outside the breaking chamber and arranged to open before the separation of the arcing contacts during an opening operation. of the circuit breaker.
  • the surface of revolution of the breaking chamber, and the bottom carrying the coil or the permanent magnet are metallic and electrically connected to the fixed arcing contact crossing this bottom.
  • the other bottom is made of insulating material to provide electrical insulation in the open position of the contacts.
  • the annular edge of the surface of revolution, adjacent to the insulating bottom, is arranged in fixed main contact, or serves as a support for the latter.
  • the surface of revolution, in this case the cylindrical surface of the breaking chamber and the bottom adjacent to the breaking zone are metallic and are used to carry or constitute the main fixed contact and its connection to the fixed arcing contact arranged in current supply conductor.
  • the opposite bottom of the breaking chamber is distant from the breaking zone and being less stressed thermally and mechanically, it can be made of an insulating material ensuring electrical insulation in the open position of the circuit breaker.
  • This insulating bottom is advantageously in the shape of a cone and comprises a cylindrical metal insert surrounding the movable contact with low clearance and electrically connected to the latter, for example by a rubbing contact constituted by an elastic ring.
  • the movable main contact is carried and electrically connected to the movable arcing contact, which simplifies the making and mounting of the device.
  • the assembly, fixed main contact and movable main contact is arranged in the extension of the breaking chamber while respecting the size of the latter.
  • the main contacts advantageously include a tulip contact which can be either integral with the movable part, or integral with the fixed part of these contacts.
  • the tulip contact can be arranged as a bridge contact cooperating with two fixed main contacts arranged opposite one another.
  • Each pole can be housed in an individual enclosure in the form of a coaxial cylinder and external to the breaking chamber or all the poles of the circuit breaker can be placed inside a common enclosure of suitable shape.
  • the invention is applicable to a circuit breaker with magnetic arc blowing by a coil switched on when the main contacts are opened or when the arc is switched on an electrode or with magnetic arc blowing by a permanent magnet.
  • the invention is described below as being applied to a circuit breaker with double pneumatic blowing through the two arcing contacts of tubular shape but it is applicable to a circuit breaker with single blowing, in particular for escaping gases through the movable contact .
  • a pole of a medium-voltage or high-voltage switch comprises an enclosure 10 confined by a cylindrical envelope 12, closed at its ends by two bottoms 14,16.
  • the enclosure 10 is filled with a gas with high dielectric strength, in particular sulfur hexafluoride at atmospheric pressure or at overpressure.
  • the cylindrical casing 12 may be made of an insulating material and the bottoms 14, 16 made of conductive material constitute areas of current supply.
  • the tubular movable contact 20 carries at its end a movable arcing contact 22, cooperating with a fixed arcing contact 24 carried by the opposite bottom 14.
  • the cylindrical surface 28 and the bottom 30 adjacent to the fixed contact 24 are metallic and electrically connected to the fixed contact 24.
  • the opposite bottom 32, crossed by the movable contact 20, is made of an insulating material ensuring electrical insulation between the movable contact 20 and the cylindrical surface 28.
  • Inside the interrupting chamber 26 is disposed a coil 34 attached to the metal bottom 30.
  • the coil 34 of a well known type is capped with an electrode 36 constituting a migration path of arc arranged opposite the movable arcing contact 22.
  • the coil 34 is electrically connected on the one hand, to the electrode 36 and on the other hand, at the bottom 30 so as to be inserted in series between the arcing contact mobile 22 and the fixed contact 24 in the closed position of the circuit breaker.
  • the breaking chamber 26 communicates with the enclosure 10, which constitutes an expansion chamber, on the one hand, by the movable tubular contact 20, the base has orifices 38 for communication between the tubular interior of the contact and the enclosure 10 and on the other hand, by the fixed contact 24 of tubular shape, which is extended through the coil 34 by a central conduit 40 and which communicates at its base by orifices 42 with the enclosure 10.
  • the movable arc contact 22 In the closed position of the circuit breaker shown in the right half-view of FIG. 1, the movable arc contact 22 is abutted to the electrode 36 by closing the two conduits d 'exhaust formed by the contacts 20,24.
  • the movable arcing contact 22 is a semi-fixed telescopic contact urged by a spring 44 in the extended position.
  • a sliding contact 46 carried by the bottom 16 of the enclosure 10, cooperates with the movable contact 20 to ensure the electrical connection of this movable contact 20 and of the current supply range formed by this bottom 16.
  • the cylindrical surface 28 of the interrupting chamber 26 is extended projecting from the insulating bottom 32 by a collar 48 arranged in fixed main contact.
  • the fixed main contact 48 cooperates with a movable main contact 50 constituted by a tulip contact carried by a support 52 secured to the movable contact 20.
  • the fingers of the tulip contact 50 cooperate with the internal surface of the collar 48 so as to respect the size of the breaking chamber 26, but it is clear that a reverse arrangement so as to enclose the collar 48 externally is usable when the size of the main contacts is secondary.
  • the movable arcing contact 22 mounted telescopically remains abutted to the electrode 36 under the action of the spring 44.
  • the current is switched in the parallel circuit constituted by the movable arcing contact 22 and the coil 34.
  • the opening of the main contacts 48.50 takes place without forming an arc and as soon as the current is switched in the parallel circuit, the coil 34 generates a magnetic field which blows the arc forming during the separation of the arcing contacts 22,36 during the continued opening movement of the circuit breaker.
  • the arc drawn in the breaking chamber 26 causes the gas contained in this chamber to heat up and build up in pressure, which gas escapes through the tubular contacts 20, 24 towards the expansion chamber formed by the enclosure 10, by pneumatically blowing the arc extending between the movable arcing contact 22 and the electrode 36.
  • the combined action of the rotary blowing of the arc and the pneumatic blowing by expansion ensures rapid extinction of the arc.
  • the cutting zone is arranged in the vicinity of the metal bottom 30 of the cutting chamber 26 while the opposite bottom of insulating material 32 is distant and protected from the action of the arc.
  • the insulating bottom 32 By placing the insulating bottom 32 away from the cut-off zone, the risks of pollution and breakdown are limited while having a cut-off chamber 26 with a metallic cylindrical casing 28 ensuring the electrical connection of the fixed main contact 48 and the fixed arcing contact 24.
  • the assembly is particularly simple and compact.
  • the coil 34 is switched on as soon as the main contacts 48.50 are opened, but it is clear that this switching can be carried out in a manner known per se by switching the arc on the electrode 36.
  • the coil 34 can also be replaced by a permanent magnet and the pneumatic blowing can be carried out through one of the contacts, in particular the movable contact 20.
  • a multipole circuit breaker is formed by an association of several poles but it is possible to use a common enclosure 10 to all the poles of the circuit breaker, the shape of the enclosure being of course suitable for the arrangement of the poles inside this enclosure.
  • main contacts 48.50 may be different and two alternative embodiments are described below with reference to Figures 3 and 4 by way of example. In these figures, the same reference numbers are used to designate elements identical or analogous to those of FIG. 1.
  • the movable contact 20 carries a movable main contact 54 in the form of a tulip contact bridge.
  • the tulip contact bridge 54 cooperates on the one hand, with the fixed main contact 48 carried by the breaking chamber 26 and on the other hand, with a fixed contact cylindrical 56 electrically connected to the current supply range 16.
  • the bridge contact 54 is retracted inside the fixed cylindrical contact 56 by separating from the fixed main contact 48 in the manner described above.
  • a main tulip contact 58 is carried by the cylindrical surface 28 of the breaking chamber 26, this tulip contact 58 extending in the direction of a movable main contact 60 in the form of a cylinder. secured to the movable contact 20.
  • the insulating bottom 32 of the switching chamber 16 carries a skirt 62 of insulating or conductive material, interposed between the main contacts 58, 60 and the movable contact 20.
  • a skirt 62 can be used on the other variants described.
  • FIG. 5 illustrates a preferred embodiment of the insulating bottom 32, which is of course usable in the other variants.
  • the insulating bottom 32 is cone-shaped to increase the line of flight and ensure better dielectric strength.
  • a metal insert 64 is interposed enclosing the movable contact 20 with little play and electrically connected to this movable contact 20 by a sliding contact constituted by an elastic metal ring 66 housed in an annular groove of the insert 64 opposite the movable contact 20. This avoids any risk of priming in the air space allowing the relative sliding between the movable contact 20 and the insulating bottom 32.

Landscapes

  • Arc-Extinguishing Devices That Are Switches (AREA)
  • Circuit Breakers (AREA)
EP88401529A 1987-07-02 1988-06-20 Disjoncteur à arc tournant et à expansion Expired - Lifetime EP0298809B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8709524A FR2617633B1 (fr) 1987-07-02 1987-07-02 Disjoncteur a arc tournant et a expansion
FR8709524 1987-07-02

Publications (2)

Publication Number Publication Date
EP0298809A1 EP0298809A1 (fr) 1989-01-11
EP0298809B1 true EP0298809B1 (fr) 1993-09-15

Family

ID=9352883

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88401529A Expired - Lifetime EP0298809B1 (fr) 1987-07-02 1988-06-20 Disjoncteur à arc tournant et à expansion

Country Status (13)

Country Link
US (1) US4900882A (ja)
EP (1) EP0298809B1 (ja)
JP (1) JP2746379B2 (ja)
KR (1) KR0129003B1 (ja)
CN (1) CN1018965B (ja)
BR (1) BR8803290A (ja)
CA (1) CA1314919C (ja)
DE (1) DE3884078T2 (ja)
ES (1) ES2046317T3 (ja)
FR (1) FR2617633B1 (ja)
IN (1) IN171665B (ja)
TR (1) TR23310A (ja)
YU (1) YU47287B (ja)

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Also Published As

Publication number Publication date
CN1030496A (zh) 1989-01-18
YU126688A (en) 1991-02-28
FR2617633B1 (fr) 1989-11-17
ES2046317T3 (es) 1994-02-01
DE3884078D1 (de) 1993-10-21
KR890002930A (ko) 1989-04-12
JPS6421839A (en) 1989-01-25
JP2746379B2 (ja) 1998-05-06
CA1314919C (en) 1993-03-23
TR23310A (tr) 1989-10-20
IN171665B (ja) 1992-12-05
BR8803290A (pt) 1989-01-31
CN1018965B (zh) 1992-11-04
KR0129003B1 (ko) 1998-04-15
FR2617633A1 (fr) 1989-01-06
EP0298809A1 (fr) 1989-01-11
DE3884078T2 (de) 1994-04-21
US4900882A (en) 1990-02-13
YU47287B (sh) 1995-01-31

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