EP0008546B1 - Druckgasschalter mit magnetischer und pneumatischer Selbstbeblasung - Google Patents

Druckgasschalter mit magnetischer und pneumatischer Selbstbeblasung Download PDF

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Publication number
EP0008546B1
EP0008546B1 EP19790400532 EP79400532A EP0008546B1 EP 0008546 B1 EP0008546 B1 EP 0008546B1 EP 19790400532 EP19790400532 EP 19790400532 EP 79400532 A EP79400532 A EP 79400532A EP 0008546 B1 EP0008546 B1 EP 0008546B1
Authority
EP
European Patent Office
Prior art keywords
switch
coil
chamber
conducting disk
arc
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
Application number
EP19790400532
Other languages
English (en)
French (fr)
Other versions
EP0008546A1 (de
Inventor
Régis Rival
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 EP0008546A1 publication Critical patent/EP0008546A1/de
Application granted granted Critical
Publication of EP0008546B1 publication Critical patent/EP0008546B1/de
Expired 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
    • H01H33/04—Means for extinguishing or preventing arc between current-carrying parts
    • H01H33/18—Means for extinguishing or preventing arc between current-carrying parts using blow-out magnet
    • 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
    • H01H33/28—Power arrangements internal to the switch for operating the driving mechanism
    • H01H33/285—Power arrangements internal to the switch for operating the driving mechanism using electro-dynamic repulsion

Definitions

  • the invention relates to a self-blowing switch having a sealed enclosure filled with a gas with high dielectric strength, such as sulfur hexafluoride, in which are housed a pair of separable contacts, a field production coil.
  • a gas with high dielectric strength such as sulfur hexafluoride
  • magnetic blowing in rotation of an arc drawn between the separate contacts and a gas compression and blowing device comprising a movable partition and a fixed partition delimiting a chamber of variable volume to piston the gas filling the chamber by displacement of the partition mobile.
  • a known switch (US Pat. No. 3,665,134) combines the pneumatic blowing and the magnetic blowing in rotation of the arc.
  • the embodiment illustrated in FIG. 6 uses magnetic coils traversed by the current to be cut to reduce the operating forces, in particular of the compression device with piston and cylinder.
  • the assembly is complicated and requires several coils, the inductance of which prevents rapid switching of the current. This switch has never been sold.
  • the object of the present invention is to remedy these drawbacks and to allow the production of a combined self-blowing switch of simple manufacture.
  • the switch according to the present invention is characterized in that said movable partition, in the form of a conductive disc independent of the movable member of the switch, is acted upon, when the switch is closed, in the inactive position of maximum spacing of the fixed partition and adjoining the front face of the coil, arranged outside said chamber, the coil generating, when the switch opens, on the one hand, an electrodynamic force of repulsion of the conductive disc by effect Thomson to compress the gas contained in the chamber, and on the other hand said magnetic blowing field in rotation of the arc extending in the chamber.
  • a blowing piston propelled by the Thomson effect is known from US Pat. No. 2,381,244, but the actuating coil is distant from the cutting zone and the arc extends axially preventing any rotation of the arc.
  • the coil is advantageously fixed and the conductive disc constitutes the movable piston of the blowing device.
  • the conductive disc arranged as a blowing piston, also acts as a contact or as an electrode for migrating the arc.
  • the constituent elements of the switch are housed in a sealed insulating envelope, filled with sulfur hexafluoride, the movable contact, arranged in tubular contact for discharge of the blowing gases towards a dead compartment of the envelope, being actuated by a control rod passing through the insulating jacket.
  • the fixed or semi-fixed contact can be solid or tubular to allow a double blowing of the arc.
  • the coil is preferably supplied by the current flowing through the switch, being connected in series with the arc breaking contacts.
  • bypass contacts opening simultaneously or before the breaking contacts, shunt the coil in the closed position of the switch.
  • the blowing coil is switched on by switching the arc on an auxiliary electrode in a manner well known per se.
  • a sealed envelope 10 elongated by a pole of a switch or circuit breaker, is filled with a gas with high dielectric strength, in particular sulfur hexafluoride, and contains the constituent elements of the pole.
  • An actuating rod 12 crosses one of the bottoms of the cylindrical casing 10 in leaktight fashion and is extended by a tubular contact 16, which extends along the axis of the pole through a fixed partition 18.
  • the chamber 20 confined by the partition 18 and the bottom 14, communicates through orifices 22 with the interior of the tubular contact 16.
  • a semi-fixed disc-shaped contact 24 of equal diameter to the inside diameter of the casing 10.
  • the disc 24 constitutes a free piston movable along the axis of the pole over a limited stroke and delimiting with the partition 18 a chamber 26 of volume variable.
  • the face of the disc 24, opposite the contact 16, is arranged opposite the front face of an annular coil 28, fixedly mounted inside the casing 10 and the inlet of which is electrically connected by a conductor 30 to a terminal 32 of the pole.
  • the output of the coil 28 is connected to sliding contacts 34, cooperating with an axial rod 36 secured to the disc 24.
  • a movable shunt contact 38 capable of cooperating with a fixed contact 40 electrically connected to terminal 32.
  • a compression spring 42 interposed between the font 44 opposite the bottom 14 of the casing 10, and the end of the rod 36, biases the latter in an open position of the contacts of shunt 38, 40, corresponding to a lowered position of the semi-fixed assembly 24, 36, 38, in the direction of the tubular contact 16.
  • the stroke of the spring 42 is small but sufficient to open the contacts 38, 40 and its force is greater than that of a return spring 45 urging the rod 36 upwards.
  • the movement of the disc 24 is limited on the one hand by the reel 28 and on the other hand by the partition 18, and it is easy to see that the volume of the chamber 26 is maximum in the position attached from the disc 24 to the reel 28.
  • the partition 18 has in its thickness an annular groove 46, which surrounds the end of the tubular contact 16 and constitutes a cutting chamber in which the arc can extend after the abutment of the disc 24 against the partition 18
  • the other terminal 48 of the pole crosses the casing 10 and carries sliding contacts 50, cooperating with the rod 12, which of course includes an insulating section (not shown).
  • the current flows through the terminal 48, the sliding contacts 50, the tubular contact 16, the disc 24, the rod 36, the shunt contacts 38 , 40 and terminal 32.
  • the coil 48 is connected in parallel with the shunt contacts 38, 40.
  • the opening of the switch is controlled by a downward movement of the rod 12, and of the tubular contact 16 which separates of the contact disc 24 with the formation of an arc 52.
  • the semi-fixed assembly 24, 36, 38 follows in its movement the tubular contact 16 with a delay, due to the inertia and to the piston effect of the disc 24 compressing the gas in the chamber 26.
  • the shunt contacts 38, 40 open by switching the current in the coil 28, the excitation of which causes Thomson effect an abrupt repulsion of the disc 24.
  • This repulsion of the disc 24 generates a compression of the gas from the chamber 26 and an exhaust of this gas through the tubular contact 16 and the orifices 22 towards the dead chamber 20.
  • the disc 24 acts as an arc blowing piston in a manner well known per se.
  • the magnetic field generated by the coil 28 causes a rotation of the arc 52, the roots of which migrate on the one hand on the disc 24, and on the other hand on the periphery of the contact. tubular 16.
  • the switch is closed by sliding the rod 12 upwards, bringing the tubular contact 16 into abutment against the disc 24.
  • a continued movement moves the semi-fixed assembly 24, 36, 38 upwards initial position for closing the shunt contacts 38, 40 and positioning the disc 24, facing the coil 28, at a short distance from the latter.
  • the semi-fixed assembly 24, 36, 38 may comprise a tubular part for discharging compressed gas towards the upper chamber of the envelope 10 for performing a double axial blowing.
  • FIG. 2 illustrates a switch of this type in which the excitation of the blowing coil 28 is not obtained by opening shunt contacts, but by switching the arc on an auxiliary electrode.
  • the tubular contact 16 cooperates with a coaxial fixed tubular contact 54 electrically connected to the terminal 32.
  • An annular disc 56 has a tubular tail 58 which surrounds the fixed tubular contact 54.
  • the disc 56 is slidably mounted in the chamber 26, so as to form a piston for compressing the gas contained in the chamber 26, and it cooperates with the coil 28 to be repelled by the Thomson effect from as described above.
  • a switching electrode 60 At the front of the end of the fixed contact 54 is disposed a switching electrode 60, in the direction of the movable contact 16, to allow switching of the arc on this electrode 60 during the opening movement of the switch .
  • the coil is connected on the one hand to terminal 32 and on the other hand to electrode 60.
  • the coil 28 From the moment of switching, the coil 28 generates a magnetic field which causes on the one hand the repulsion by Thomson effect of the annular piston 56 and on the other hand a magnetic blowing of the arc which performs a rotary movement on the electrode 60 advantageously in shape circular.
  • the right part of Figure 2 shows the switch during opening. The gases compressed by the piston 56 escape through the two tubular contacts 16, 54 towards the end chambers of the envelope 10. The operation is of course identical to that described with reference to FIG. 1, and it is clear that the activation of the coil 28 could be obtained by a shunt contact system or any other suitable means. It is possible to design a switching electrode 60 integral with the tubular tail 58 of the annular disc 56 or other variants of this kind.

Landscapes

  • Arc-Extinguishing Devices That Are Switches (AREA)
  • Circuit Breakers (AREA)

Claims (5)

1. Selbstblasschalter mit einem von einem Gas hoher dielektrischer Festigkeit, nämlich Schwefelhexafluorid gefüllten dichten Gefäss (10), in dem angeordnet sind: ein Paar, trennbare Kontakte (16, 24, 54), eine ein magnetisches Blasfeld erzeugende Spule (28) zur Rotation eines zwischen den getrennten Kontakten gezogenen Lichtbogens (52) und eine Gaskompressions- und Blaseinrichtung, die eine eine Kammer (26) von veränderlichem Inhalt begrenzende, bewegliche Wand (24, 56) und eine feststehende Wand (18) besitzt zum Pumpen des die Kammer (26) füllenden Gases durch Bewegung der beweglichen Wand (24, 56); dadurch gekennzeichnet, dass die genannte bewegliche Wand (24, 56), in Form einer leitenden, von dem beweglichen Teil des Schalters unabhängigen Scheibe, in inaktiver Lage mit grösstem Abstand von der feststehenden Wand (18) und gegen die Frontseite der ausserhalb der genannten Kammer (26) liegenden Spule (28) gedrückt wird, wenn der Schalter geschlossen ist, wobei die Spule (28) bei Öffnung des Schalters einerseits eine elektrodynamische Abstosskraft der leitenden Scheibe (24, 56) durch Thomsoneffekt zur Kompression des in der Kammer (26) enthaltenen Gases, und andererseits das genannte magnetische Rotationsblasfeld des sich in der Kammer (26) erstreckenden Lichtbogens (52) erzeugt.
2. Schalter nach Anspruch 1, dadurch gekennzeichnet, dass der bewegliche Kontakt (16) die feststehende Wand (18) durchquert und mit einem halb feststehenden, der leitenden Scheibe zugeordneten Kontakt zusammenarbeitet, so dass der Lichtbogen lf der leitenden Scheibe verankert ist.
3. Schalter nach Anspruch 2, dadurch gekennzeichnet, dass die Spule (28), die leitende Scheibe (24) und der bewegliche Kontakt (16) koaxial sind, wobei der bewegliche Kontakt (16) sich axial bewegt und die leitende Scheibe (24) den beweglichen Kontakt (16) in seiner Bewegung auf einer beschränkten Strecke begleitet.
4. Schalter nach Anspruch 2 oder 3, dadurch gekennzeichnet, dass der bewegliche Kontakt (16) und/oder die leitende Scheibe (24, 56) ein Auslassrohr des Druckgases der Kammer (26) aufweist.
5. Schalter nach irgend einem der Ansprüche 1, 2, 3 oder 4, dadurch gekennzeichnet, dass ein Paar von Nebenschlusskontakten (38, 40; 16, 54) parallel zur Spule (28) geschaltet sind, um diese in geschlossener Lage des Schalters in Nebenschluss zu legen, wobei die genannten Nebenschlusskontakte gleich bei Beginn der Öffnung des Schalters öffnen, um die Spule einzuschalten.
EP19790400532 1978-08-17 1979-07-26 Druckgasschalter mit magnetischer und pneumatischer Selbstbeblasung Expired EP0008546B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR7824089 1978-08-17
FR7824089A FR2433824A1 (fr) 1978-08-17 1978-08-17 Interrupteur a autosoufflage magnetique et pneumatique de l'arc

Publications (2)

Publication Number Publication Date
EP0008546A1 EP0008546A1 (de) 1980-03-05
EP0008546B1 true EP0008546B1 (de) 1982-11-17

Family

ID=9211915

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19790400532 Expired EP0008546B1 (de) 1978-08-17 1979-07-26 Druckgasschalter mit magnetischer und pneumatischer Selbstbeblasung

Country Status (4)

Country Link
EP (1) EP0008546B1 (de)
JP (1) JPS5543789A (de)
DE (1) DE2964051D1 (de)
FR (1) FR2433824A1 (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112362723B (zh) * 2020-10-29 2022-03-04 武汉大学 一种基于稳态汤森原理的sf6替代气体寻找方法及装置

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB378471A (en) * 1931-05-09 1932-08-09 Electr & Allied Ind Res Ass Improvements relating to electric switches or circuit breakers
BE416168A (de) * 1935-07-08
US2381244A (en) * 1943-01-07 1945-08-07 Westinghouse Electric Corp Circuit interrupter
US2665134A (en) * 1947-04-22 1954-01-05 Giannelli Joseph Automatic phonograph
DE1142201B (de) * 1959-11-28 1963-01-10 Fuji Electric Co Ltd Schnellschalter
US3665134A (en) * 1966-09-01 1972-05-23 Westinghouse Electric Corp Circuit breakers having radial magnetic field coil inserted into series circuit during the opening operation
JPS5316537Y2 (de) * 1975-07-04 1978-05-01
JPS5210028U (de) * 1975-07-09 1977-01-24

Also Published As

Publication number Publication date
JPS5543789A (en) 1980-03-27
DE2964051D1 (en) 1982-12-23
EP0008546A1 (de) 1980-03-05
FR2433824A1 (fr) 1980-03-14
FR2433824B1 (de) 1980-12-12

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