EP0543681B1 - Mittelspannungslastschalter für innen oder aussen - Google Patents

Mittelspannungslastschalter für innen oder aussen Download PDF

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Publication number
EP0543681B1
EP0543681B1 EP92401816A EP92401816A EP0543681B1 EP 0543681 B1 EP0543681 B1 EP 0543681B1 EP 92401816 A EP92401816 A EP 92401816A EP 92401816 A EP92401816 A EP 92401816A EP 0543681 B1 EP0543681 B1 EP 0543681B1
Authority
EP
European Patent Office
Prior art keywords
circuit
rod
breaker according
insulating
poles
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
EP92401816A
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English (en)
French (fr)
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EP0543681A1 (de
Inventor
Paul Rozier
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Grid Solutions SAS
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GEC Alsthom SA
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Publication of EP0543681A1 publication Critical patent/EP0543681A1/de
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Publication of EP0543681B1 publication Critical patent/EP0543681B1/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
    • H01H33/02—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
    • H01H33/121—Load break switches
    • H01H33/125—Load break switches comprising a separate circuit breaker
    • H01H33/127—Load break switches comprising a separate circuit breaker movable with a sectionalising contact arm and operated by such movement
    • 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
    • H01H33/022—Details particular to three-phase circuit breakers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/52—Cooling of switch parts
    • H01H2009/526—Cooling of switch parts of the high voltage switches

Definitions

  • the present invention relates to a medium voltage circuit breaker according to the preamble of claim 1, up to 36 kV, usable indoors or outdoors.
  • circuit breakers are known to use vacuum interrupters, in particular from document DE-U-8 614 497.
  • Such a circuit breaker comprises, for each pole, an insulating bushing comprising a first cylindrical part containing a vacuum interrupter, said vacuum interrupter comprising an insulating envelope closed by first and second metallic flanges, the first metallic flange bearing externally to the envelopes a first terminal and inside the envelope a fixed contact, the second flange being tightly traversed by a movable metal rod carrying a movable contact, the second flange being electrically connected to said movable rod.
  • An object of the present invention is to provide a vacuum interrupter circuit breaker of simple construction and therefore moderate cost, and having a small volume.
  • Another object of the invention is to provide a circuit breaker that can receive a simple construction current sensor.
  • the subject of the present invention is a medium-voltage circuit breaker comprising one pole per phase, each pole comprising an insulating bushing comprising a first cylindrical part containing a vacuum interrupter, said vacuum interrupter comprising an insulating envelope closed by a first and a second flange metallic, the first metal flange carrying a first terminal outside the envelope and inside the envelope a fixed contact, the second flange being leaktightly traversed by a movable metal rod carrying a movable contact, the second flange being electrically connected to said movable rod, characterized in that the insulating bushing comprising a second cylindrical part inside which is arranged coaxially a metal tube mechanically connected to the vacuum interrupter and electrically connected to said movable rod, said tube containing a control rod connected to said movable metal rod, the insulating bushings of each pole being fixed to a common profile disposed substantially at the limit between the first and the second part of each crossing, said profile serving as support for a control shaft common to the pole
  • the pole control shaft can be a rotary shaft or a shaft moving in translation along its axis.
  • the first part of said insulating bushing has internal grooves and parallel to the axis of the bushing, defining with the outside wall of the vacuum interrupter ventilation channels, the air circulating in said metal tube and penetrating into said channels through holes in said tube.
  • the vacuum interrupter is placed in a cylindrical resin cage arranged in said first part of the crossing.
  • said resin cage has internal grooves parallel to its axis, defining with the wall of the vacuum interrupter ventilation channels, the air circulating in the tube metallic and penetrating into said channels through holes in said tube.
  • the dielectric strength between said metal tube and said second part of the insulating bushing is ensured by a sheath of insulating material slid over said metal tube and engaged in said second part, the mounting being facilitated by the use of an insulating grease.
  • said sheath is made of latex.
  • the kinematic chain between said control rod and said control shaft comprises a spring play take-up mechanism.
  • the end of the control rod comprises a tubular end portion in which engages said movable rod, said movable rod comprising a lumen in which is engaged a first pin passing through said control rod, a spring s' pressing against a first support washer in contact with said end of the control rod, and against a second support washer engaged in the mobile rod and held by a second pin passing through the mobile rod.
  • the mechanical connection of said metal tube with the vacuum interrupter and the electrical connection of said metal tube with said movable contact rod is ensured by means of a sleeve fixed to said second flange, of a ring secured to said sleeve and to said tube and a contact of the accordion or ring type disposed inside said ring and surrounding said movable contact rod.
  • the movable rod is screwed to the operating rod, the electrical contact between said movable rod and the metal tube being effected by means of a lamella contact.
  • the insulating envelope is overmolded on the metal tube.
  • said end piece comprises two half-collars tightened on said metal tube and in abutment on the end of said second part of the insulating bushing.
  • a coil with a toric magnetic core surrounds said second part of the insulating bushing, at the connection fillet of said first and said second part of the insulating bushing.
  • Figure 1 shows in perspective a three-phase circuit breaker according to an embodiment of the invention.
  • the poles of the circuit breaker are referenced 1, 2 and 3: they are fixed to a common beam or common metal profile 4, serving as a support, but of hollow constitution to allow it to contain a control shaft 38 of the poles.
  • the control shaft ends in a control box secured to the beam.
  • Figure 2 is an axial sectional view of a pole, for example pole 1, but, of course, the poles are strictly identical and interchangeable.
  • the pole includes an insulating bushing 10, made of resin or elastomer, provided with fins 11.
  • the fins are attached; alternatively, they come from molding with the bushing.
  • a first part 10A of the crossing has a tubular shape and encloses a vacuum interrupter 14 shown diagrammatically.
  • the vacuum interrupter comprises an insulating envelope 15, preferably made of ceramic, and two metal end plates or flanges 16 and 17. To the plate 16 is fixed on one side a rod 18 carrying a fixed contact 19 and the 'other side a first terminal 20 of the pole.
  • the vacuum interrupter comprises a movable contact 21 carried by a rod 22 sliding in leaktight manner through the plate 17 thanks to a sealing bellows 23.
  • the inner surface of the portion 10A of the crossing is provided with grooves 12 parallel to the axis of the crossing and serving as ventilation channels, as will be explained later.
  • the dimensions of the part 10A of the bushing and in particular its internal diameter are preferably chosen to allow the vacuum bulbs of larger dimensions to be accommodated. If we want to accommodate a vacuum bulb of smaller dimensions, we will interpose, as shown in Figure 3, between the interior of the bushing 10A and the vacuum bulb 14, a cylindrical cage 13, of insulating material such as the resin, provided with external grooves 13A defining with the lateral surface of the vacuum interrupter ventilation channels.
  • the insulating bushing 10 comprises a second part 10B, also tubular, but of smaller diameter than that of the part 10A and connected to the latter by a leave 10C.
  • the interior surface of the part 10B is conical, the thickness of the crossing increasing from the leave 10C and as one moves away from it.
  • the parts 10A and 10B constitute only one piece coming from molding.
  • the tubular part 10B contains a metal tube 25, preferably made of copper, secured to the vacuum interrupter as will be shown with reference to FIG. 5, and in electrical contact with the movable rod 22 of the vacuum interrupter.
  • the tube 25 serves to convey the current between the vacuum interrupter and a complex part 26 serving in particular as a second terminal at the pole.
  • the dielectric strength between the bushing 10B and the metal tube 25 is ensured by means of a sheath 27, made of an insulating material such as latex, and having a generally tubular shape with a cylindrical internal section and a conical external section complementary to the surface. inside of part 10B of the insulating bushing.
  • this sheath is slid around the metal tube 25, slipping being facilitated by the use of an insulating grease, for example based on silicone.
  • the outer surface of the sheath is coated with the same grease and engaged in part 10B of the insulating bushing, applying pressure so as to ensure elimination of air. Maintaining the sheath in compression is ensured by means of a stop means such as a circlip 28 engaged in a groove in the tube 25.
  • the device is fixed to the profile 4 by means of a fixing collar 29.
  • the opening or closing operation of the vacuum interrupter is ensured by means of a rod 30, for example metal, sliding inside the tube 25, and secured to the rod 22.
  • This rod is articulated at 31 to a return lever 32 itself articulated at 33 on the part 26.
  • the end of the lever 32 is articulated at 34 to a first end of an insulating rod 35 whose second end is articulated at 36 to a first end d 'a connecting rod 3 7, a second end of which is wedged on the control shaft 38 placed in the beam 4.
  • the copper tube carries, in the vicinity of the plate 17, holes 25A whose role is explained now.
  • FIG. 4 shows how the metal tube 25 is mechanically fixed to the vacuum interrupter 14 and how the current can pass from the movable rod 22 to the tube 25.
  • Vacuum bulbs usually include a metal cover welded to the plate 17 and which contains a bearing for the movable rod 22.
  • the cover is modified and transformed into a sleeve 15A internally threaded to which a metal ring 15B can be screwed.
  • the tube 25 is engaged inside this ring and secured to the ring by brazing or screwing.
  • the ring and the tube then define a shoulder against which an accordion type contact or a contact socket 15C rests.
  • the shape and role of the part 26 are specified with reference to FIG. 5. It can be seen that the part 26 comprises two half-collars 41 and 42 which can be tightened by means of screws 43, 44. These collars enclose the end of the conductive tube 25 with sufficient contact pressure to ensure good current flow. The half-collars abutting against the end of the bushing 10B immobilize in axial translation the tube 25 and the vacuum interrupter 14 which is integral therewith.
  • Lugs 45 carried by the half-collars cooperate with cells made in the end of the bushing 10B to immobilize the tube 25 and consequently, the vacuum interrupter 14, in rotation.
  • Two of the ears 46 and 47 of the half-collars extend to constitute the second terminal 48 of the pole.
  • the screw 44 serves as an articulation 33 for the lever 32.
  • the collars carry a notch 49 to allow the mounting of the articulation 31.
  • the pole is completed by a current sensor 50, in the form of a coil with a toric magnetic circuit; if the fins are of the attached fin type, the toroidal winding can be closed and slid around the bushing 10B before fitting the fins 11. If the fins are molded with the bushing, the magnetic circuit is of the open type.
  • the current sensors with which the poles are fitted make it possible to detect an abnormal overload or short-circuit current in the poles, and to order the opening of the circuit breaker; the overcurrent relay with direct action and for which it is not necessary to have an auxiliary energy source, can be placed in the control box 5.
  • the current sensor detects the earth fault and triggers.
  • the outside of the crossing, in line with the torus 50 and the collar 29 for supporting the beam 4, is coated with a metallization to equalize the potential which is that of the earth.
  • the torus can be equipped with a corona hood 51 held in place by conventional means not shown.
  • FIG. 2 shows the presence, between the flange 17 and the intermediate portion 10C of the crossing, of a volume filled with air. Without special precautions, this volume would be subject to a strong potential gradient which could lead to partial discharges which in the long run can be destructive.
  • the bushing comprises, in line with the aforementioned volume, a metal mesh 51A inserted during the molding of the bushing, and which is set to the potential of the metal tube 25. In this way, the simple tension is applied to the single insulating part.
  • the operating rod 30 may comprise a play take-up member comprising a cage provided with a spring 53; this play take-up member can also, as a variant, be arranged at any location of the kinematic chain connecting the rod 22 and the control shaft 38 disposed in the beam 4.
  • This cage can in some cases be too bulky to be placed inside the metal tube 25, it is possible to replace it with the device described below with reference to FIG. 5A.
  • the movable metal rod 22 includes a light 22A in which is engaged a first pin 22B passing through the rod 30.
  • a spring 22C is disposed between a first support washer 22D in contact with the end of the tubular part 30A, and a second washer 22E engaged in the rod 22 and held by a second pin 22F passing through the rod 22.
  • the rod 30 compresses the spring 22C which transmits the force to the movable rod 22 without play.
  • the rod 30 pulls the rod 22.
  • the play take-up assembly is guided in the conductive tube 25 by the washers 22D and 22E supporting the spring.
  • the washers have holes or indentations at their periphery to allow the passage of the air flow for cooling the bulb.
  • control rod was made in tubular form; alternatively, the control rod could be a tube over its entire length.
  • FIG. 5B is an elevational view in axial section of a pole according to an alternative embodiment of the invention.
  • the elements common to FIGS. 2 and 5B have been given the same reference numbers.
  • the copper tube 25 has an upper part 25B widened by pushing back to form the lower part of the housing of the vacuum interrupter; the operating rod 30 is directly screwed to the movable contact 21 of the vacuum interrupter; the electrical contact between the rod 22 of the vacuum interrupter and the tube 25 is ensured by a strip contact 15D.
  • the upper part of the part 10A of the bushing is closed by a plate 16A screwed by screws 16B cooperating with inserts came from molding with the insulating bushing.
  • the plate 16A carries blades 16C constituting both the electrical contact and the cooling elements of the vacuum interrupter.
  • the tube 25 is placed as an insert and is therefore perfectly positioned with respect to the insulating material.
  • FIG. 5D illustrates an alternative embodiment; the elements common to FIG. 5D is to FIGS. 2 and 5B have been given the same reference numbers.
  • the copper tube 30 is of short dimension and placed at the lower part of the part 10B of the insulating bushing; it cooperates with a lamellar contact 15D placed directly on the movable rod 22 of the vacuum interrupter, to which a sufficient length has been given.
  • the play take-up device 43 is placed on the insulating rod 33.
  • the control box 5 contains, in addition to the overcurrent relay mentioned above, the mechanism for rotating the control shaft 38, making it possible to communicate to the rod 30 translational movements to ensure vacuum bulb opening and closing cycles.
  • Figure 6 is a block diagram of this mechanism whose advantage is that it is directly linked to the tree of circuit breaker control 38. It suffices to give the principle of this mechanism; its implementation is within the reach of those skilled in the art who can usefully refer to the Engineering Techniques, "Electrical equipment for high voltage interruption", by Euffer MAURY, D 657-4, page 49.
  • the mechanism comprises a drum 80 provided with a spring and which constitutes the reservoir of operating energy.
  • a gear motor 81 makes it possible to drive the drum to reset the spring.
  • the drum drives in rotation a shaft 82 always rotating in the same direction under the action of the rebound of the spring; this shaft is associated with hooking devices 83 with electric or manual control, making it possible to carry out the usual opening and closing cycles (for example a cycle o, 0.1sF, o).
  • An eccentric device 84 makes it possible to transform the one-way movement of the shaft 82 into an alternating circular movement communicated to the control shaft 38 of the poles of the circuit breaker.
  • the mechanism comprises, as is well known, a manual resetting member comprising a crank 85 visible in particular in FIG. 1.
  • FIG. 6A illustrates an alternative embodiment in which the shaft 38 is driven by a movement of translation also called rickshaw. This movement is communicated to the lever 32 in a known manner, for example by means of a lever 32A and a bent connecting rod 32B.
  • the invention typically applies to the production of a medium-voltage circuit breaker, up to a nominal voltage of 36 kV and a nominal current of 1250 A.
  • Figure 7 shows the pairs of poles 1, 1 '; 2,2 'and 3, 3' arranged on the same beam 4 with the same control shaft 38 and the same control box 5.
  • the ends of the poles are joined two by two to form terminals 61A, 61B, 61C and 62A, 62B and 62C.
  • circuit breaker can operate with a nominal voltage of 36 kV and a nominal current of 2500 A.
  • circuit breaker of the invention can cover the whole range of medium voltage circuit breakers, namely 7.2, 12, 24 and 36 kV .
  • the invention applies to the production of medium-voltage circuit breakers intended to be used either indoors or outdoors.
  • FIG. 8 illustrates a circuit breaker of the interior type with front coupling.
  • the circuit breaker has three poles of the type described above. These poles are aligned on a common support profile 4. Only the pole 71 is visible in Figure 8 since it is a side view.
  • the control mechanism is completed by a connecting rod assembly comprising a crank 75 and a connecting rod 76.
  • the terminals of the poles are extended by racking-in connections 77 and 78.
  • circuit breaker is mainly the equipment of withdrawable cells of the prior art, either new or old for which we want to replace with vacuum bulbs old technology devices (low oil circuit breakers for example). Note that for indoor installations, the circuit breaker is enclosed in a metal cell.
  • FIG. 9 represents a circuit breaker with end coupling.
  • the control unit 5 is mounted perpendicular to the support profile so that the pole control shaft 38 is in direct contact with the control mechanism.
  • the use of this type of circuit breaker, intended for the interior, is mainly the equipment of fixed cells generally equipped with isolation switches; these are either old cells to be renovated, or new cells in which one wishes to use vacuum ampoules.
  • the invention applies to the production of circuit breakers for the outside, by means of the usual adaptations against bad weather (use of insulation resistant to pollution and to ultra-violet radiation, protection of the poles against the penetration of water or snow, galvanizing of the chassis, tropicalization of the coils, etc ).
  • Figure 10 illustrates a fixed type circuit breaker with end coupling.
  • the beam 4 carrying the poles 101, 102 and 103 is made of galvanized steel. It is carried by a portico of the same metal.
  • the poles are provided with a metal protective cover 101A, 102A and 103A which shelters the bulbs from bad weather, in particular prevents the introduction of rainwater, without preventing ventilation.
  • the pole crossings are advantageously made of cyclohaliphatic epoxy resin
  • the gantry can be replaced by a simple pylon 107 constituting with the beam 4 a bracket.
  • FIGS 12 and 13 illustrate another application which is that of a circuit breaker (also called recloser), of the sectionable type, used outdoors.
  • a circuit breaker also called recloser
  • the beam 4 supporting the poles 111, 112 and 113 is pivotally mounted in a drawer 114 which can slide in a chassis 115 carried by a pylon 116.
  • the control unit is integral with the beam 4.
  • the chassis also carries the insulating supports 121, 122, 123 of arrival and 131, 132 and 133 of departure of line 117.
  • the beam 4 When the circuit breaker is in the tripped position, the beam 4 can be turned about 90 degrees. The poles are then withdrawn and contained inside the drawer 114. The drawer can be partially extracted ( Figure 13), which allows visual examination, maintenance or replacement of one or more poles. A protective mesh 118 allows the protection of maintenance personnel who access the drawer by means of a ladder 119.

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  • Gas-Insulated Switchgears (AREA)
  • Breakers (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
  • Emergency Protection Circuit Devices (AREA)
  • High-Tension Arc-Extinguishing Switches Without Spraying Means (AREA)
  • Manufacture Of Electron Tubes, Discharge Lamp Vessels, Lead-In Wires, And The Like (AREA)
  • Orthopedics, Nursing, And Contraception (AREA)
  • Materials For Medical Uses (AREA)
  • Communication Cables (AREA)
  • Cable Accessories (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)

Claims (22)

  1. Mittelspannungs-Lastschalter mit einem Pol je Phase, der eine isolierende Traverse (10) mit einem ersten, zylindrischen Teil (10A) besitzt, der eine Schaltkammer (14) mit einer isolierenden Hülle (15) enthält, die durch einen ersten (16) bzw. zweiten Metallflansch (17) verschlossen ist, wobei der erste Metallflansch (16) außerhalb der Hülle eine erste Klemme (20) und innerhalb der Hülle einen ortsfesten Kontakt (18) trägt, während durch den zweiten Flansch (17) dicht ein elektrisch mit dem Flansch (17) verbundener beweglicher Metallstab (22) verläuft, der einen beweglichen Kontakt (21) trägt, dadurch gekennzeichnet, daß die isolierende Traverse (10) einen zweiten zylindrischen Teil (10B) besitzt, in dem koaxial ein mechanisch mit der Schaltkammer (14) und elektrisch mit dem beweglichen Stab (22) verbundenes Metallrohr (25) liegt, das eine mit dem beweglichen Metallstab (22) verbundene Betätigungsstange (30) enthält, wobei die isolierenden Traversen (10) aller Pole an einem gemeinsamen Metallprofil (4) befestigt sind, das im wesentlichen an der Grenze zwischen dem ersten und dem zweiten Teil (10A, 10B) jeder Traverse (10) liegt, daß das Metallprofil (4) eine allen Polen gemeinsame Steuerwelle (38) besitzt, die an den Betätigungsmechanismus gekoppelt ist, daß die Steuerstange (30) jedes Pols mechanisch mit der Welle (38) über einen Hebel (32), der an einem fest mit dem Metallrohr (25) verbundenen Endstück (26) angelenkt ist, und über einen isolierenden Arm (35) gekoppelt ist, der mit einem ersten Ende an den Hebel (32) und mit einem zweiten Ende an einer Kurbelstange (37) angelenkt ist, die auf der Steuerwelle (38) verkeilt ist, und daß das Endstück (26) mechanisch und elektrisch mit dem Metallrohr (25) verbunden ist und die zweite Klemme (48) des Pols bildet.
  2. Lastschalter nach Anspruch 1, dadurch gekennzeichnet, daß der erste Teil (10A) der isolierenden Traverse (10) zur Achse der Traverse parallele innere Rinnen (12) aufweist, die mit der Außenwand der Schaltkammer Lüftungskanäle definieren, wobei die Luft durch das Metallrohr (25) strömt und in die Kanäle durch Löcher (25A) im Rohr eindringt.
  3. Lastschalter nach einem der Ansprüche 1 und 2, dadurch gekennzeichnet, daß die Steuerwelle (38) drehbar ist.
  4. Lastschalter nach einem der Ansprüche 1 und 2, dadurch gekennzeichnet, daß die Steuerwelle (38) eine translatorisch entlang ihrer Achse verschiebbare Welle ist.
  5. Lastschalter nach einem der Ansprüche 1, 3 und 4, dadurch gekennzeichnet, daß die Schaltkammer (14) in einem zylindrischen Käfig (13) aus Harz liegt, der sich im ersten Teil (10A) der Traverse (10) befindet.
  6. Lastschalter nach Anspruch 5, dadurch gekennzeichnet, daß der Käfig (13) aus Harz zu seiner Achse parallele innere Rinnen (13A) aufweist, die mit der Wand der Schaltkammer (14) Belüftungskanäle definieren, wobei die Luft durch das Metallrohr (25) strömt und in die Kanäle durch Löcher (25A) im Rohr eindringt.
  7. Lastschalter nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß die Durchschlagsfestigkeit zwischen dem Metallrohr (25) und dem zweiten Teil (10B) der isolierenden Traverse durch eine Umhüllung (27) aus einem Isoliermaterial gewährleistet wird, die auf das Metallrohr (25) aufgezogen und in den zweiten Teil (2B) gesteckt wird, wobei die Montage durch die Verwendung eines Isolierfetts erleichtert wird.
  8. Lastschalter nach Anspruch 7, dadurch gekennzeichnet, daß die Umhüllung (27) aus Latex ist.
  9. Lastschalter nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, daß die kinematische Kette zwischen der Steuerstange (30) und der Steuerwelle (38) einen Mechanismus mit einer Feder (53) enthält, um das mechanische Spiel zu kompensieren.
  10. Lastschalter nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, daß das Ende der Steuerstange (30) einen rohrförmigen Endbereich (30A) enthält, in den der bewegliche Stab (22) eindringt, wobei dieser Stab einen Schlitz (22A) besitzt, in dem ein erster die Steuerstange durchquerender Stift (22B) verläuft, wobei eine Feder (22C) sich an einer ersten Stützscheibe (22D) in Kontakt mit dem Ende der Steuerstange (30) und an einer zweiten Stützscheibe (22E) abstützt, die auf den beweglichen Stab (22) aufgesteckt ist und durch einen zweiten, den beweglichen Stab (22) durchquerenden Stift (22F) gehalten wird.
  11. Lastschalter nach einem der Ansprüche 1 bis 10, dadurch gekennzeichnet, daß die mechanische Verbindung des Metallrohrs (25) mit der Schaltkammer (14) und die elektrische Verbindung des Metallrohrs (25) mit dem beweglichen Kontaktstab (22) über eine am zweiten Flansch (17) befestigte Hülse (15A), einen an der Hülse (15A) und dem Rohr (25) befestigten Ring (15B) und einen Kontaktring (15C) vom Akkordeontyp erfolgt, der sich in dem Ring (15B) befindet und den beweglichen Kontaktstab (22) umgibt.
  12. Lastschalter nach einem der Ansprüche 1 bis 10, dadurch gekennzeichnet, daß der bewegliche Stab (22) mit der Steuerstange (30) verschraubt ist, wobei der elektrische Kontakt zwischen dem beweglichen Stab (22) und dem Metallrohr über einen Lamellenkontakt (15D) erfolgt.
  13. Lastschalter nach Anspruch 12, dadurch gekennzeichnet, daß die isolierende Hülle auf das Metallrohr (25) aufgegossen ist.
  14. Lastschalter nach einem der Ansprüche 1 bis 13, dadurch gekennzeichnet, daß das Endstück (26) zwei Halbkragen (41, 42) aufweist, die auf das Metallrohr (25) aufgepreßt sind und am Ende des zweiten Teils (10B) der isolierenden Traverse (10) anliegen.
  15. Lastschalter nach Anspruch 14, dadurch gekennzeichnet, daß die beiden Halbkragen (41, 42) Zapfen (45) besitzen, die mit Vertiefungen im zweiten Teil (10B) der isolierenden Traverse (10) zur Festlegung des Metallrohrs (25) in Drehrichtung zusammenwirken.
  16. Lastschalter nach einem der Ansprüche 1 bis 15, dadurch gekennzeichnet, daß ein bewickelter Magnetring (50) den zweiten Teil (10B) der isolierenden Traverse (10) in Höhe der Kehle (10C) des Übergangs vom ersten zum zweiten Teil (10A, 10B) der isolierenden Traverse (10) umgibt.
  17. Mittelspannungs-Lastschalter nach einem der Ansprüche 1 bis 16, dadurch gekennzeichnet, daß die Pole (71) und der Steuerkasten an einem beweglichen Chassis (72) befestigt sind, wobei die Steckverbindungen der Pole des Lastschalters (77, 78) so ausgebildet sind, daß sie ein frontales Einstecken erlauben, und wobei die Steuerwelle (38) der Pole an den Steuerkasten (5) über ein Gestänge (75, 76) angeschlossen ist.
  18. Mittelspannungs-Lastschalter nach einem der Ansprüche 1 bis 16, dadurch gekennzeichnet, daß die Pole (91, 92, 93) auf einem gemeinsamen Tragprofil (4) sitzen, das die gemeinsame Steuerwelle (38) in direktem Eingriff mit dem Steuerkasten (5) enthält, wobei der Kasten mit dem Tragprofil (4) fest verbunden ist und das Tragprofil (4) von einem Chassis (94) getragen wird, wobei die Pole (91, 92, 93) des Lastschalters so ausgebildet sind, daß sie eine endseitige Kopplung erlauben.
  19. Mittelspannungs-Lastschalter nach einem der Ansprüche 1 bis 16 für Außenanlagen, dadurch gekennzeichnet, daß das gemeinsame Profil (4) zum Tragen der Pole (101, 102, 103), das die gemeinsame Steuerwelle enthält, von einem Gerüst oder einer Auslegersäule (107) getragen wird, wobei der in dem Steuerkasten enthaltene Steuermechanismus in der Nähe des Bodens angeordnet ist und mit der Steuerwelle (38) über ein Gestänge (105) und ein Umlenkgestänge (106) gekoppelt ist.
  20. Mittelspannungs-Lastschalter nach Anspruch 19, dadurch gekennzeichnet, daß über jedem der Pole (101, 102, 103) eine Schutzhaube (101A, 102A, 103A) angeordnet ist, die das Eindringen von Regenwasser verhindert, aber die Luftkühlung der Schaltkammer (14) zuläßt.
  21. Mittelspannungs-Lastschalter nach einem der Ansprüche 1 bis 16 für Außenanlagen, dadurch gekennzeichnet, daß das Tragprofil (4) für die drei Pole (111, 112, 113) innerhalb einer Schublade (114) beweglich angeordnet ist, daß die Schublade von einem Chassis (115) getragen wird, das seinerseits am oberen Ende einer Säule (116) liegt, und daß der Lastschalter durch Drehung um 90° von den Kontakten entfernt werden kann, die von den die Leitung (117) tragenden Stützisolatoren (121, 122, 123; 131, 132, 133) getragen werden, und daß die Schublade für Wartungsarbeiten oder für den Ersatz der Pole teilweise herausgezogen werden kann.
  22. Mittelspannungs-Lastschalter nach einem der Ansprüche 17 bis 21, dadurch gekennzeichnet, daß jedem Pol (1, 2, 3) ein identischer Pol (1', 2', 3') parallel verbunden zugeordnet ist, um den Nennstrom zu verdoppeln.
EP92401816A 1991-11-20 1992-06-26 Mittelspannungslastschalter für innen oder aussen Expired - Lifetime EP0543681B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9114312A FR2683940B1 (fr) 1991-11-20 1991-11-20 Disjoncteur a moyenne tension pour l'interieur ou l'exterieur.
FR9114312 1991-11-20

Publications (2)

Publication Number Publication Date
EP0543681A1 EP0543681A1 (de) 1993-05-26
EP0543681B1 true EP0543681B1 (de) 1997-07-30

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Family Applications (1)

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EP92401816A Expired - Lifetime EP0543681B1 (de) 1991-11-20 1992-06-26 Mittelspannungslastschalter für innen oder aussen

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US (1) US5350892A (de)
EP (1) EP0543681B1 (de)
JP (1) JPH07114093B2 (de)
CN (1) CN1031020C (de)
AT (1) ATE156300T1 (de)
BR (1) BR9204467A (de)
CA (1) CA2083301C (de)
DE (1) DE69221264T2 (de)
DK (1) DK0543681T3 (de)
ES (1) ES2103908T3 (de)
FR (1) FR2683940B1 (de)
GR (1) GR3025127T3 (de)
MX (1) MX9206632A (de)
TR (1) TR26197A (de)
TW (1) TW228598B (de)
WO (1) WO1993010547A1 (de)
ZA (1) ZA928951B (de)

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Also Published As

Publication number Publication date
FR2683940B1 (fr) 1993-12-31
CA2083301C (fr) 1996-01-16
MX9206632A (es) 1993-06-01
CN1073800A (zh) 1993-06-30
JPH07114093B2 (ja) 1995-12-06
ATE156300T1 (de) 1997-08-15
WO1993010547A1 (fr) 1993-05-27
JPH05509195A (ja) 1993-12-16
FR2683940A1 (fr) 1993-05-21
US5350892A (en) 1994-09-27
DK0543681T3 (da) 1997-08-18
BR9204467A (pt) 1993-05-25
TR26197A (tr) 1995-02-15
TW228598B (de) 1994-08-21
ES2103908T3 (es) 1997-10-01
ZA928951B (en) 1993-05-19
CA2083301A1 (fr) 1993-05-21
GR3025127T3 (en) 1998-02-27
DE69221264D1 (de) 1997-09-04
EP0543681A1 (de) 1993-05-26
CN1031020C (zh) 1996-02-14
DE69221264T2 (de) 1997-11-27

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