EP2073235B1 - Elektrischer Erdungs-Trennschalter, der ein autonomes pyrotechnisches Stellglied umfasst, und Schutzanlage gegen interne Lichtbögen, die mit einem solchen Erdungs-Trennschalter ausgestattet ist - Google Patents

Elektrischer Erdungs-Trennschalter, der ein autonomes pyrotechnisches Stellglied umfasst, und Schutzanlage gegen interne Lichtbögen, die mit einem solchen Erdungs-Trennschalter ausgestattet ist Download PDF

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Publication number
EP2073235B1
EP2073235B1 EP20080354086 EP08354086A EP2073235B1 EP 2073235 B1 EP2073235 B1 EP 2073235B1 EP 20080354086 EP20080354086 EP 20080354086 EP 08354086 A EP08354086 A EP 08354086A EP 2073235 B1 EP2073235 B1 EP 2073235B1
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EP
European Patent Office
Prior art keywords
electric
short
circuiting switch
connection means
deformable
Prior art date
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Active
Application number
EP20080354086
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English (en)
French (fr)
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EP2073235A1 (de
Inventor
Hugues Filiputti
Mathias Lamien
Stephen Rowe
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Schneider Electric Industries SAS
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Schneider Electric Industries SAS
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Application filed by Schneider Electric Industries SAS filed Critical Schneider Electric Industries SAS
Publication of EP2073235A1 publication Critical patent/EP2073235A1/de
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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H39/00—Switching devices actuated by an explosion produced within the device and initiated by an electric current
    • H01H39/004—Closing switches
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00—Mechanisms for operating contacts
    • H01H3/60—Mechanical arrangements for preventing or damping vibration or shock
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H31/00—Air-break switches for high tension without arc-extinguishing or arc-preventing means
    • H01H31/003—Earthing switches
    • 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
    • H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
    • H01H33/66—Vacuum switches
    • H01H33/664—Contacts; Arc-extinguishing means, e.g. arcing rings
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H79/00—Protective switches in which excess current causes the closing of contacts, e.g. for short-circuiting the apparatus to be protected

Definitions

  • the invention relates to an electrical short-circuiter between at least two electrical terminals.
  • the short-circuiter comprises an insulating casing in which are positioned a pyrotechnic actuator for moving a movable needle for closing a self-clamping electrical contact assembly.
  • Said moving needle is intended to move along a longitudinal axis between a first armed position and a second triggered position.
  • the short-circuiter comprises a self-tightening electrical contact assembly comprising a movable conductive member intended to be connected to at least a first electrical terminal and extending along a longitudinal axis and a hollow envelope intended to be connected to a second electrical terminal. .
  • Said member and said envelope are intended to come into electrical contact by moving relative to each other under the action of the moving needle.
  • the invention also relates to a set of protection against internal arcs for connecting an electrical busbar to the ground and comprising at least one short-circuiter according to the invention.
  • the desired performance is very high.
  • the short-circuiting times of the phase conductors to the ground must be very short and the holding in the closed position of the contacts must be long enough for an upstream circuit-breaker to detect the short-circuit fault and cut off the power supply. .
  • the short-circuit currents are of the order of 50kA or higher.
  • the internal arc short-circuiter must also have a high dielectric withstand especially supporting lightning strikes.
  • the pyrotechnic actuation means comprise in particular a pyrotechnic initiator, the moving needle.
  • the difficulty of using the pyrotechnic initiators lies especially in the management of the explosion gases at the time of actuation. Indeed, the energy (heat) released can be significant and present a potential risk for a user located next to the actuation zone.
  • the moving parts move at very high speeds and also present risks.
  • the invention therefore aims to overcome the disadvantages of the state of the art, so as to provide an electric short-circuiter comprising a reliable and compact pyrotechnic actuator.
  • the pyrotechnic actuator of the short-circuiter comprises a conductive cylinder body having means for being electrically connected to a second electrical terminal, electrical connection means now permanent electrical contact between the conductive cylinder body and moving needle moving in said body.
  • the movable needle is connected by a mechanical connection to the mobile conducting member and forms a mobile functional unit; the needle and said member being at the same electrical potential.
  • the electrical connection means comprise a multipoint annular contact positioned between the internal volume of the conductive cylinder body and the mobile functional assembly.
  • the moving needle comprises a first axial abutment intended to come into contact with a second abutment of the body of the jack to lock said needle in the tripped position.
  • the second stop of the cylinder body is deformable to absorb a portion of the displacement energy of the needle.
  • the pyrotechnic actuator comprises a sealing envelope placed inside the cylinder body and enveloping at least a portion of the moving needle.
  • the movable conductive member comprises a first electrical contact zone connected to the outer periphery of said member by at least one shoulder.
  • the hollow envelope comprises first deformable electrical connection means, said deformable electrical connection means being intended to come into contact with said at least one shoulder to move under the action of a force to push and deform against a stop of displacement.
  • Said first deformed first electrical connection means developing a clamping force having a principal component directed in a radial direction perpendicular to the longitudinal axis, the clamping force ensuring an electromechanical connection between the first electrical contact area of the movable conductive member and the first deformable electrical connection means.
  • the first deformable electrical connection means have an annular shape, said annular shape having an inner periphery of substantially identical section to that of the outer periphery of the first electrical contact area of the movable conductive member.
  • Said annular shape has an outer periphery of substantially identical section to that of the inner periphery of the hollow envelope.
  • said movable conductive member comprises a cylindrical section at the first electrical contact zone, section having an outer radius equal to the inner radius of said annular shape of the first deformable electrical connection means.
  • the first deformable electrical connection means comprise at least one metal washer having, in the radial direction, a developed surface greater than the surface projected in this direction.
  • said at least one metal washer has a conical shape.
  • the first deformable electrical connection means comprise at least two stacked conical metal washers.
  • said at least two conical metal washers are stacked head to tail.
  • the metal washers are mechanically connected two by two to form a conductive element.
  • the hollow envelope comprises intermediate compression means, said compression means being intended to move in contact with the shoulder and uniformly transmit the thrust force to the first deformable electrical connection means.
  • the short-circuiter comprises at least second deformable electrical connection means electrically connected to at least one third electrical terminal and being intended to come into electrical contact with a second electrical contact zone of mobile functional assembly moving.
  • the deformable electrical connection means and the mobile conductive member are positioned in a vacuum bulb, in the open position, the electrical insulation being made by vacuum.
  • the short-circuiter comprises a semi-liquid dielectric designed to isolate the deformable electrical connection means from the mobile conducting member.
  • the semi-liquid dielectric comprises a silicone gel
  • the semi-liquid dielectric is contained in a contention cage.
  • the first electrical contact area is located at a first end of the movable conductive member, said first end having a pointed and hollow penetration area.
  • the first electrical contact zone of the first end is rough and / or knurled and / or ridged.
  • the mobile functional assembly is animated by a gyroscopic movement during its displacement along the longitudinal axis of displacement.
  • the internal arc protection assembly comprises an internal arc detection sensor connected to a decision unit, said decision unit connected to one or more short-circuiters being intended to authorize the actuation of the pyrotechnic actuators.
  • the electric short-circuit 1 is intended to short-circuit at least two electrical terminals such as for example two phase conductors U, V, W between them, two or three phase conductors U, V, W at an earth terminal.
  • the short-circuiter 1 as represented on the Figures 4 and 5 allows for example to connect a phase conductor to a ground terminal.
  • the short-circuiter 1 has two operating positions; a closed position when all the electrical terminals are at the same electrical potential and an open position when the electrical terminals have different electrical potentials.
  • the short-circuiter 1 according to the different embodiments of the invention comprises an insulating jacket 100 in which are positioned a pyrotechnic actuator 200 and a self-clamping electrical contact assembly 300.
  • the self-clamping electrical contact assembly 300 includes a movable conductive member 301 for connection to at least a first electrical terminal.
  • the movable conductive member 301 extends along a longitudinal axis Y.
  • Said assembly 300 further comprises a hollow envelope 302 intended to be connected to a second electrical terminal.
  • the hollow envelope 302 has an opening for the passage of said movable conductive member 301.
  • Said member and said envelope are intended to come into electrical contact by moving relative to each other under the action of the moving needle. 201.
  • the hollow envelope 302 is fixed in the insulating casing 100 of the short-circuiter 1.
  • the movable conductive member 301 is then intended to be propelled by the moving needle 201 of the pyrotechnic actuator 200.
  • the pyrotechnic actuator 200 comprises a movable needle 201 for moving along a longitudinal axis Y between a first armed position and a second triggered position. During its movement, said needle causes the closing of the assembly with self-tightening electrical contacts 300.
  • the moving needle 201 is intended to be propelled by compressed gases generated by the explosion of a pyrotechnic charge.
  • the operating energy released by the pyrotechnic actuator 200 ensures a high closing speed of the electrical contacts of the self-clamping electrical contact assembly 300.
  • Said needle can move within a cylinder body 202
  • the first armed position of the moving needle 201 generally corresponds to an open electrical state of the self-clamping electrical contact assembly 300.
  • the triggered position of the moving needle 201 generally corresponds to a closed electrical state of the assembly. self-tightening electrical contacts 300.
  • the movable needle 201 is connected by a mechanical connection to a second end 313 of the movable conductive member 301.
  • the movement of the movable needle 201 causes that of the movable member 301 along the same longitudinal axis of displacement Y.
  • the movable needle 201 and the movable conductive member 301 form a single movable functional assembly 201-301. Indeed, the two parts constituting the mobile functional assembly 201-301 move simultaneously along the longitudinal axis of displacement Y and are at the same electrical potential.
  • the short-circuiter 1 is in a closed state of operation when the self-clamping electrical contact assembly 300 is in a closed electrical state.
  • the short-circuiter 1 is in an open operating state when the self-clamping electrical contact assembly 300 is in an open electrical state.
  • the actuator cylinder body 202 of the pyrotechnic actuator 200 comprises a first and a second end.
  • the first end being closed by a yoke 204.
  • the second end having an opening for the passage of the movable needle 201.
  • An initiator pyrotechnic device 206 placed inside the cylinder head 204 for generating a gas inside the cylinder body 202 and propelling the moving needle 201 through the second end.
  • the mobile functional assembly 201-301 comprises a first zone and at least a second electrical contact zone.
  • the electrical contact zones are electrically connected to one another.
  • Said first electrical contact zone preferably located at the first end 312 of the movable conductive member 301, is intended to be in electrical contact with the first deformable electrical connection means 323 of the hollow envelope 302 of the self-clamping contact assembly 300, said assembly then being in the closed position.
  • Said at least one second electrical contact zone of the mobile functional assembly 201-301 is intended to be connected to at least one second electrical terminal.
  • said at least one second electrical contact zone is permanently connected to the second terminal regardless of the electrical state of the self-clamping electrical contact assembly 300.
  • said at least one second electrical contact area is intended to be placed in contact with the second terminal after the movable conductive member 301 has begun moving, that is, after the moving needle 201 has left the armed position.
  • the mobile functional assembly 201-301 comprises at least one second electrical zone in permanent contact with a second electrical terminal of the short-circuiter 1.
  • the notion of permanent contact means that the contact between said second zone and the second electrical terminal is realized whatever the position of the movable conductive member 301.
  • connection between said at least one second zone and the second terminal is achieved via a cylinder body 202 of the pyrotechnic actuator 200.
  • the mobile functional assembly 201-301 is electrically connected to a second electrical terminal via the conductive cylinder body 202.
  • the cylinder body 202 comprises means intended to be electrically connected to the first electrical terminal.
  • electrical connection means 207 maintain a permanent electrical contact between the conductive cylinder body 202 and the mobile functional assembly 201-301.
  • the electrical connection means 207 comprise a multipoint annular contact 207 positioned between the internal volume of the conductive cylinder body 202 and the mobile functional assembly 201-301.
  • the multipoint annular contact 207 is composed of at least one helical spring wound and positioned in a circular groove.
  • the groove is placed in the inner wall of the cylinder body 202.
  • the dimensioning and the number of multipoint annular contact 207 is a function of the caliber of the device and the intensity of the electric currents to be conveyed.
  • two annular multipoint contacts 207 are in contact with the electrical contact areas of the movable functional assembly 201-301.
  • a first multipoint annular contact 207 is in contact with the moving needle 201 and a second annular contact is in contact with the movable conductive member 301.
  • the jack body 202 may comprise an inner casing 203 positioned inside said body and enveloping at least a portion of the movable needle 201.
  • the inner casing 203 ensures a better gas tightness generated by the pyrotechnic initiator 206 at the time of its activation.
  • the inner casing 203 also provides better mechanical strength at the time of the explosion of the pyrotechnic initiator charge 206.
  • the inner casing 203 has the shape of a tube.
  • the moving needle 201 comprises a first axial abutment intended to come into contact with a second abutment of the body of the jack 202 to lock said needle in the tripped position.
  • the second stop can it is positioned on the inner casing 203. Said second stop of the cylinder body 202 is deformable to absorb a part of the displacement energy of the moving needle 201.
  • the mobile functional assembly 201-301 comprises at least a second electrical zone in contact intended to be placed in contact with at least one second electrical terminal after the movable conductive member 301 has begun to move.
  • the self-clamping electrical contact assembly 300 When the short-circuiter 1 is in the open position, the self-clamping electrical contact assembly 300 is in an open state, and all electrical terminals are electrically isolated.
  • the self-clamping electrical contact assembly 300 is closed after a displacement of the mobile functional assembly 201-301.
  • the first electrical contact zone of the movable conductive member 301 is in contact with the first deformable electrical connection means 323 of the hollow envelope 302.
  • Said at least one second electrical contact zone is then in contact with a second electrical terminal via a second deformable electrical connection means 400.
  • the movable assembly 201-301 comes into contact with at least one second deformable electrical connection means 400 electrically connected to a second electrical terminal.
  • the second deformable electrical connection means 400 connected to a second electrical terminal are placed in short circuit with the first electrical terminal connected via the first deformable electrical connection means 323.
  • the short-circuiter 1 comprises three second deformable electrical connection means 400 respectively connected to an electrical terminal.
  • This embodiment makes it possible to short-circuit three phase conductors U, V, W to earth.
  • each second deformable electrical connection means 400 will be in contact with a second electrical contact zone of the mobile functional assembly 201-301, themselves connected to the one earth terminal via the set to self-clamping electrical contacts 300.
  • Said electrical contact areas of the movable functional assembly 201-301 are all at the same earth potential when the self-clamping electrical contact assembly 300 is in a closed state.
  • the conductive cylinder body 202 is not electrically connected to an electrical terminal.
  • the mobile functional assembly 201-301 is not in contact with an electrical terminal when the short-circuiter 1 is in the open position.
  • the short-circuiter 1 comprises only two second electric connection means with lamellae 400 respectively connected to a phase conductor.
  • the third phase conductor would then be connected to the cylinder body 202, itself electrically connected to the functional mobile assembly 201-301 by one or more multipoint annular contacts 207.
  • the particularity of the autonomous pyrotechnic actuator according to these embodiments of the invention is to form a complete and autonomous pyrotechnic actuation module which groups together at least the following three functionalities.
  • the autonomous pyrotechnic actuator is sealed and no external manifestation due to the explosion gases is observed outside the cylinder body 202.
  • the cylinder body 202 associated with the mobile functional assembly 201- 301 provides a seal from the inside to the outside of said body.
  • the cylinder body 202 is conductive and is intended to be electrically connected to an electrical terminal.
  • the mobile functional assembly 201-301 comprising at least one moving needle 201 is conductive and is intended to be electrically connected to the cylinder body 202.
  • the first electrical contact zone is preferably placed at a first end 312 of the movable conductive member 301.
  • This first electrical contact zone is connected to the outer periphery of said movable conductive member 301 by at least one shoulder 314.
  • the movable conductive member 301 is of cylindrical shape.
  • the diameter of the cylinder at the first end 312 is smaller than the diameter of the remainder of the movable conductive member 301.
  • the junction of the cylinders of different diameter then forms said shoulder 314.
  • the shoulder may be for example made by means of a washer engaged on the cylindrical body of the movable conductive member 301.
  • the hollow envelope 302 comprises first deformable electrical connection means 323.
  • Said first deformable electrical connection means 323 are intended to move and to deform under the action of a thrust force Fp generated by the conductive member mobile 301 on the move.
  • the thrust force Fp is generated when the shoulder 314 of the movable conductive member 301 comes into contact with the first deformable electrical connection means 323.
  • Said first deformable first deformable electrical connection means 323 then develop a clamping force Fs having a principal component directed in a radial direction Z perpendicular to the longitudinal axis of displacement Y.
  • the clamping force Fs provides both a mechanical connection and an electrical connection. between the first electrical contact zone of the movable conductive member 301 and the deformable electrical connection means 303.
  • the movable conductive member 301 can not bounce against the hollow envelope 302. A harmful rebound would cause a reopening of the electrical contacts of the contact assembly 300.
  • the hollow envelope 302 preferably comprises a cylindrical opening bore.
  • the first deformable electrical connection means 323 are annular in shape and are positioned within the cylindrical bore.
  • Said annular shape has an outer periphery of substantially identical section to that of the inner periphery of the bore of the hollow envelope 302.
  • the movable conductive member 301 has a cylindrical section at the first electrical contact area.
  • the annular shape of the first deformable electrical connection means 323 has an inner periphery of substantially identical section to that of the outer periphery of the first electrical contact area of the movable conductive member 301.
  • the first deformable electrical connection means 323 comprise at least one metal washer 324.
  • Said at least one metal washer comprises, in the radial direction Z, a developed surface greater than the projected surface.
  • said at least one metal washer 324 has a conical shape.
  • the first deformable electrical connection means 323 comprise at least two stacked conical metal washers 324.
  • the conical metal washers 324 are preferably stacked upside down.
  • the choice of the number of metal washers 324 to be stacked is conditioned by the electrical current density flowing through the self-clamping electrical contact assembly 300 when the short-circuiter 1 is in the closed position. According to a development mode, the short-circuiter 1 is intended for the circulation of short-circuit currents of several kilos amperes. Twelve metal washers 324 are then stacked head-spades against the displacement stop 322.
  • the metal washers 324 conical and stacked head to tail are mechanically connected in pairs to form a deformable conductive element.
  • the hollow envelope 302 comprises intermediate compression means 325 placed at the opening of the bore of the hollow envelope 302.
  • the intermediate compression means 325 comprise a metal washer whose internal diameter is less than outer diameter of the movable conductive member 301 so that the shoulder 314 can abut against said metal washer.
  • Said intermediate compression means 325 are intended to move in contact with the shoulder 314 and uniformly transmit the thrust force Fp to the first deformable electrical connection means 323.
  • the intermediate compression means 325 are conductive.
  • the first electrical contact area and the first deformable electrical connection means 323 are isolated by a dielectric or vacuum.
  • the electrical insulation between the deformable electrical connection means 400 is preferably made by vacuum, all the elements then being preferably positioned in a vacuum bulb.
  • a dielectric 4 is used for the electrical insulation.
  • the dielectric 4 is semi-liquid and preferably comprises a silicone gel.
  • the isolation distances between the electrical terminals must be sufficient to isolate them especially in the event of a lightning strike.
  • the first end 312 of the movable conductive member 301 comprises a pointed penetration zone.
  • the first end 312 of the movable conductive member 301 comprises a pointed and hollow penetration zone. A part of the dielectric can infiltrate inside the movable conductive member 301 when the latter passes through the dielectric.
  • the semi-liquid dielectric is contained in a contention cage 303 placed in the insulating envelope.
  • the contention cage 303 comprises at least two rings connected by rods.
  • the moving needle 201 is animated with a gyroscopic movement during its movement from the first armed position to the second triggered position. This gyro movement is transmitted to the movable conductive member 301 during its movement.
  • the first electrical contact zone of the first end 312 is rough and / or knurled and / or ridged. This surface state of the first contact zone allows better electrical contact of the contacts of the self-clamping electrical contact assembly 300 in the closed position.
  • all the electrical contact zones of the mobile functional assembly 201, 301 are rough and / or knurled and / or striated.
  • the invention also relates to a protection assembly against internal arcs.
  • said assembly is intended for the protection of an electrical installation powered by an electric busbar U, V, W.
  • the assembly protection is intended to connect all the electric bars U, V, W to earth. This earth connection must be carried out during the time required for complete disconnection of the installation by a circuit breaker.
  • Said protection circuit breaker is generally placed upstream of the short-circuit fault.
  • the internal arc protection kit includes a specific sensor that detects the internal arc.
  • This sensor can in particular, to be an optical sensor.
  • This sensor is connected, preferably by optical fibers 21 to a decision center 2.
  • This decision center 2 allows the actuation of the pyrotechnic actuators of one or more short-circuiter 1 according to the invention.
  • An optical fiber link allows very fast information transfers.
  • each phase can be connected to the earth by a short-circuiter 1 independent, it will speak of short-circuiter 1 single phase.
  • the decision unit 2 causes the pyrotechnic actuators of each short-circuiter 1 to be fired.
  • the synchronization between the three short-circuiters 1 is ensured by the detonation tube 22.
  • the triggering of a single short-circuit circuiter 1 ensures simultaneous closure of the other two.
  • the firing of the pyrotechnic charge causes the almost instantaneous translation of a mobile functional assembly 201-301. Said assembly is placed and locked in the first deformable electrical connection means 323. All the electrical terminals U, V, W are then short-circuited to earth in a few microseconds.
  • the internal arc protection assembly also includes a specific sensor to detect the internal arc. This sensor is connected to the decision unit 2 which authorizes the actuation of the pyrotechnic actuator of the three-phase short-circuiter 1.

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Claims (15)

  1. Elektrischer Kurzschließer (1) zur Erzeugung eines Kurzschlusses zwischen mindestens zwei elektrischen Anschlussklemmen, welcher Kurzschließer eine Isolierstoffumhüllung (100) umfasst, in der
    - ein Sprengantrieb (200), der dazu dient, einen beweglichen Bolzen (201) zum Schließen einer selbstklemmenden elektrischen Kontaktanordnung (300) zu verschieben, welcher bewegliche Bolzen (201) dazu dient, sich in einer Längsachse (Y) zwischen einer ersten Gespanntstellung und einer zweiten Ausgelöststellung zu bewegen, sowie
    - eine selbstklemmende elektrische Kontaktanordnung (300) angeordnet sind, die
    - ein in der Längsachse (Y) angeordnetes, bewegliches Leiterelement (301), das dazu dient, mit mindestens einer ersten Anschlussklemme verbunden zu werden, und
    - ein Hüllrohr (302) umfasst, das dazu dient, mit einer zweiten Anschlussklemme verbunden zu werden,
    - wobei das genannte Leiterelement und das genannte Hüllrohr dazu dienen, unter Einwirkung des beweglichen Bolzens (201) durch relative Bewegung zueinander elektrisch miteinander in Kontakt zu treten,
    dadurch gekennzeichnet, dass
    der Sprengantrieb (200) einen leitenden Zylinder (202) mit Mitteln umfasst, die dazu dienen, mit einer zweiten Anschlussklemme verbunden zu werden, wobei elektrische Verbindungsmittel (207) einen dauerhaften elektrischen Kontakt zwischen dem leitenden Zylinder (202) und dem, in dem genannten Zylinder verschobenen beweglichen Bolzen (201) aufrechterhalten.
  2. Kurzschließer nach Anspruch 1, dadurch gekennzeichnet, dass die elektrischen Verbindungsmittel (207) mindestens einen ringförmigen Mehrfachkontakt umfassen, der zwischen dem Innenraum des leitenden Zylinders (202) und dem beweglichen Bolzen (201) angeordnet ist.
  3. Kurzschließer nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass der bewegliche Bolzen (201) über eine mechanische Verbindung mit dem beweglichen Leiterelement (301) verbunden ist und mit diesem eine bewegliche Funktionseinheit (201-301) bildet, wobei der bewegliche Bolzen und das genannte Leiterelement auf dem gleichen elektrischen Potenzial liegen.
  4. Kurzschließer nach irgendeinem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass
    - das bewegliche Leiterelement (301) eine erste elektrische Kontaktzone umfasst, die über mindestens einen Absatz (314) mit der äußeren Umfangsfläche des genannten Leiterelements verbunden ist,
    - das Hüllrohr (302) verformbare, erste elektrische Verbindungsmittel umfasst (323), welche verformbaren elektrischen Verbindungsmittel dazu dienen, mit dem genannten mindestens einfach vorhandenen Absatz (314) in Berührung zu gelangen, um sich unter Einwirkung einer Schubkraft (Fp) zu verschieben und durch Führung gegen einen Verschiebeanschlag (322) zu verformen,
    - wobei die genannten ersten elektrischen Verbindungsmittel (323) bei ihrer Verformung eine Klemmkraft (Fs) mit einer senkrecht zur Längsachse (Y), in Radialrichtung (Z) wirkenden Hauptkomponente erzeugen, welche Klemmkraft (Fs) eine elektromechanische Verbindung zwischen der ersten elektrischen Kontaktzone des beweglichen Leiterelements (301) und den verformbaren ersten elektrischen Verbindungsmitteln (323) gewährleistet.
  5. Elektrischer Kurzschließer nach Anspruch 4, dadurch gekennzeichnet, dass die verformbaren ersten elektrischen Verbindungsmittel (323) ringförmig ausgebildet sind, wobei
    - die genannte ringförmige Ausbildung eine innere Umfangsfläche umfasst, die annähernd den gleichen Querschnitt aufweist wie die äußere Umfangsfläche der ersten elektrischen Kontaktzone des beweglichen Leiterelements (301) und
    - die genannte ringförmige Ausbildung eine äußere Umfangsfläche aufweist, die annähernd den gleichen Querschnitt aufweist wie die innere Umfangsfläche des Hüllrohrs (302).
  6. Elektrischer Kurzschließer nach Anspruch 5, dadurch gekennzeichnet, dass das genannte bewegliche Leiterelement (301) im Bereich der ersten elektrischen Kontaktzone einen zylindrischen Querschnitt aufweist, welcher Querschnitt einen Außenradius besitzt, der dem Innenradius der genannten ringförmigen Ausbildung der verformbaren ersten elektrischen Verbindungsmittel (323) entspricht.
  7. Elektrischer Kurzschließer nach Anspruch 5 oder 6, dadurch gekennzeichnet, dass die verformbaren ersten elektrischen Verbindungsmittel (323) mindestens eine Metallscheibe (324) umfassen, deren Planfläche in Radialrichtung (Z) gesehen größer ist als die Projektionsfläche.
  8. Elektrischer Kurzschließer nach Anspruch 7, dadurch gekennzeichnet, dass die mindestens einfach vorhandene Metallscheibe (324) konisch ausgebildet ist.
  9. Elektrischer Kurzschließer nach Anspruch 8, dadurch gekennzeichnet, dass die verformbaren ersten elektrischen Verbindungsmittel (323) mindestens zwei aufeinander gelegte konische Metallscheiben (324) umfassen.
  10. Elektrischer Kurzschließer nach Anspruch 9, dadurch gekennzeichnet, dass die genannten mindestens zwei konischen Metallscheiben (324) mit jeweils entgegengesetzter Neigung aufeinander gelegt sind.
  11. Elektrischer Kurzschließer nach irgendeinem der Anspruch 7 bis 10, dadurch gekennzeichnet, dass die erste elektrische Kontaktzone in Höhe des ersten Endes (312) des beweglichen Leiterelements (301) ausgebildet ist, welches erste Ende (312) einen hohlförmigen, spitz abgeschrägten Eindringbereich umfasst.
  12. Elektrischer Kurzschließer nach irgendeinem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die verformbaren ersten elektrischen Verbindungsmittel (323, 400) und das bewegliche Leiterelement (301) in der Offenstellung in einer Vakuumröhre angeordnet sind und die elektrische Isolation durch das Vakuum gewährleistet wird.
  13. Elektrischer Kurzschließer nach irgendeinem der Ansprüche 1 bis 12, dadurch gekennzeichnet, dass er ein halbflüssiges Dielektrikum (4) umfasst, das dazu dient, die elektrische Isolation zwischen den verformbaren elektrischen Verbindungsmitteln (323, 400) und dem beweglichen Leiterelement (301) zu gewährleisten.
  14. Elektrischer Kurzschließer nach Anspruch 13, dadurch gekennzeichnet, dass das halbflüssige Dielektrikum (4) ein Silikongel umfasst.
  15. Störlichtbogen-Schutzvorrichtung, die dazu dient eine Sammelschienenanordnung (U, V, W) mit Erde zu verbinden und mindestens einen Kurzschließer (1) nach den vorhergehenden Ansprüchen umfasst, dadurch gekennzeichnet, dass die Schutzvorrichtung eine, mit einer zentralen Entscheidungsschaltung (2) verbundene Störlichtbogen-Detektiervorrichtung umfasst, wobei die genannte, an einen oder mehrere Kurzschließer (1) angeschlossene zentrale Entscheidungsschaltung (2) dazu dient, im Bedarfsfall die Aktivierung der Sprengantriebe zu veranlassen.
EP20080354086 2007-12-18 2008-11-21 Elektrischer Erdungs-Trennschalter, der ein autonomes pyrotechnisches Stellglied umfasst, und Schutzanlage gegen interne Lichtbögen, die mit einem solchen Erdungs-Trennschalter ausgestattet ist Active EP2073235B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0708814A FR2925213B1 (fr) 2007-12-18 2007-12-18 Court-circuiteur electrique comprenant un actionneur pyrotechnique autonome et ensemble de protection contre les arcs internes comportant un tel court-circuiteur

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EP2073235A1 EP2073235A1 (de) 2009-06-24
EP2073235B1 true EP2073235B1 (de) 2013-01-09

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Publication number Priority date Publication date Assignee Title
US8492672B2 (en) * 2011-08-05 2013-07-23 Eaton Corporation Insulated arc flash arrester
FR2980301B1 (fr) 2011-09-21 2014-06-20 Schneider Electric Ind Sas Court-circuiteur electrique a actionneur pyrotechnique
SE536707C2 (sv) 2012-10-19 2014-06-10 Samuel Dahl Anordning för snabb kortslutning och jordning av faserna i ett kraftnät
DE102014115396A1 (de) * 2014-10-22 2014-12-18 Peter Lell Trennschalter für hohe Gleich- oder Wechselströme bei hohen Spannungen

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Publication number Priority date Publication date Assignee Title
US4427963A (en) * 1982-11-01 1984-01-24 S & C Electric Company Brake and operation indicator for a high-voltage switch
US4852494A (en) 1987-11-16 1989-08-01 Williams Robert A Explosively actuated switch
AU2086397A (en) * 1996-04-04 1997-10-29 Kabelkonfektion Gebauer & Griller Gmbh Device for interrupting the flow of current in a cable
DE19746566A1 (de) 1997-10-22 1999-04-29 Kloeckner Moeller Gmbh Kurzschließer, insbesondere für eine Störlichtbogen-Schutzvorrichtung zur Verwendung in Anlagen zur Verteilung elektrischer Energie
US20030231439A1 (en) * 2002-06-14 2003-12-18 Juds Mark Allan Bullet assembly for a vacuum arc interrupter
US6952332B2 (en) 2002-06-14 2005-10-04 Eaton Corporation Vacuum arc eliminator having a bullet assembly actuated by a gas generating device

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FR2925213A1 (fr) 2009-06-19
EP2073235A1 (de) 2009-06-24
FR2925213B1 (fr) 2009-11-27

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