EP0385265A1 - Spring motor driving mechanism for a circuit breaker - Google Patents

Spring motor driving mechanism for a circuit breaker Download PDF

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Publication number
EP0385265A1
EP0385265A1 EP90103414A EP90103414A EP0385265A1 EP 0385265 A1 EP0385265 A1 EP 0385265A1 EP 90103414 A EP90103414 A EP 90103414A EP 90103414 A EP90103414 A EP 90103414A EP 0385265 A1 EP0385265 A1 EP 0385265A1
Authority
EP
European Patent Office
Prior art keywords
drive shaft
spring
switch
spring force
drive according
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP90103414A
Other languages
German (de)
French (fr)
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EP0385265B1 (en
Inventor
Max Kuhn
Rudi Schmidt
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.)
General Electric Switzerland GmbH
Original Assignee
GEC Alsthom T&D AG
Sprecher Energie AG
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Application filed by GEC Alsthom T&D AG, Sprecher Energie AG filed Critical GEC Alsthom T&D AG
Publication of EP0385265A1 publication Critical patent/EP0385265A1/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00—Mechanisms for operating contacts
    • H01H3/22—Power arrangements internal to the switch for operating the driving mechanism
    • H01H3/30—Power arrangements internal to the switch for operating the driving mechanism using spring motor
    • H01H3/3042—Power arrangements internal to the switch for operating the driving mechanism using spring motor using a torsion spring
    • 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
    • H01H33/42—Driving mechanisms
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00—Mechanisms for operating contacts
    • H01H3/32—Driving mechanisms, i.e. for transmitting driving force to the contacts
    • H01H3/42—Driving mechanisms, i.e. for transmitting driving force to the contacts using cam or eccentric

Definitions

  • the present invention relates to a spring force drive for a circuit breaker, in particular a vacuum switch for medium voltage, according to the preamble of claim 1.
  • Such a spring drive for a vacuum circuit breaker for medium voltage is described in the Calor-Emag-Mitteilungen I / II / 1986 on pages 9 to 12.
  • This known spring force drive has a drive shaft which is driven by a spiral spring for switching the circuit breaker on and off in the same direction of rotation.
  • a support disc with two support surfaces sits on the drive shaft in a rotationally fixed manner, which cooperate with a fixed, pivotably supported support member in the switch-on or switch-off position of the drive shaft.
  • On the drive shaft there is also a cam for each pole, the circumferential surface of which forms a control cam for a follower roller arranged at one end of a pivoting lever.
  • the other end of the pivot lever is connected to the movable switching contact of a vacuum interrupter via a contact pressure spring arrangement.
  • a switch-off spring also acts on the swivel lever, which presses the follower roller against the circumferential surface of the cam disk.
  • the support element releases the support plate and thus the drive shaft for a rotation of 270 °, whereby the movable switching contact is brought into the switch-on position via the cam plate acting on the follower roller and the swivel lever.
  • Both Contact pressure spring assembly as well as the opening spring tensioned. In order to open the circuit breaker, the support element releases the support disc for a rotation of 90 °.
  • the swivel lever and the movable switching contact are returned to the switch-off position by the switch-off spring according to the shape of the circumferential surface, the movement of the swivel lever being determined by the cam disc, against the circumferential surface of which the follower roller is pressed by the switch-off spring.
  • the switch-off springs are dimensioned much stronger than would be necessary to achieve the required speed of the movable switch contact. This means that large energies must be made available for switching, which causes large forces and a corresponding dimensioning in the drive.
  • a particularly simple tensile and pressure-effective connection between the cam disk arrangement and the lifting member is achieved in one embodiment according to claim 2.
  • An embodiment according to claim 3 leads to a smooth, play-free movement.
  • a particularly easy to install spring force drive is achieved by the embodiment according to claim 12.
  • the drive can be adapted to different needs by the very simple exchange of elements sitting on the drive shaft.
  • the angle of rotation between the switch-off and the switch-on position can be freely selected by exchanging support levers.
  • the spring force drive is particularly well suited for a switch arrangement as specified in CH patent application No. 02 283/88 or the corresponding US patent application No. 07/361 257.
  • the circuit breaker for medium voltage has a spring drive 10 and three vacuum interrupters 12 driven by it.
  • the vacuum interrupters 12 and the connecting linkage 14 between the respective vacuum interrupters 12 and the drive 10 are constructed identically and are described using the pole shown on the far left in FIGS. 1 and 3 and in FIG. 2.
  • Each vacuum interrupter 12 has a stationary switching contact 16 indicated by a broken line and a movable switching contact 20 arranged at the upper end of a switching plunger 18 (FIG. 1).
  • the switching plunger 18 is connected in an articulated manner via a pin 22 to a double-armed pivot lever 24, which at the other end is operatively connected via a contact pressure spring arrangement 26 to a cam arrangement 30 seated on a drive shaft 28 of the spring-loaded drive 10.
  • Each of the three cam disk arrangements 30 has two spaced apart and oppositely formed disks 32, in each of which a groove 34 is stamped around the drive shaft 28, the grooves 34 being open in the direction of the axis 28 'of the drive shaft 28 and against one another, see in particular Figure 3.
  • a cylindrical and parallel to the drive shaft 28 follower 36 is guided, which is arranged on a bracket 38 extending approximately in the radial direction with respect to the drive shaft 28.
  • the tab 38 has an elongate passage 40 in the longitudinal direction of the tab 38, as is the case here in particular from Figure 1 in the two only partially shown tabs 38 for the middle and right switching tube 12 and Figures 2 and 3.
  • the disks 32 are punched out of sheet metal and the grooves 34 are embossed in the same operation, with protruding beads 48 being formed on the side of the disk 32 opposite the groove 34 in each case.
  • the grooves 34 run approximately eccentrically in the drive shaft 28, the greatest distance between the groove 34 and the axis 28 'of the drive shaft 28 in the direction of this axis in the rotational position of the disks 32 shown in the figures 28 'to the follower 36 is located.
  • the direction of the shortest distance is shown in dash-dotted lines in FIG. 2, designated by 50 and, viewed in the counterclockwise direction, is offset by approximately 150 ° with respect to the follower 36.
  • the follower 36 In the position of the disks 32 shown in the figures, the follower 36 is in the lower end position in which the pivot lever 24, as shown in solid lines in FIG. 2, is pivoted clockwise and the movable switching contact 28 is brought into the switched-on position. However, the disks 32 are clockwise by 150 ° rotates so that the shortest distance 50 is between the follower 36 and the axis 28 ', the follower 36 is raised to its upper end position in which the pivot lever is pivoted counterclockwise in the position 24 ⁇ shown in dashed lines, the circuit breaker switched off.
  • the link 38 Adjacent to the follower 36, the link 38 is articulated to a rocker 52, which runs approximately parallel to the pivot lever 24 and is also pivotally mounted on the chassis 46 by means of a shaft 54 at its end remote from the link 38.
  • the rocker 52 has two spaced-apart and parallel to each other rocker arms 52 ', which extend on both sides of the tab 38 and are connected to it via a pin 56.
  • a contact pressure spring 58 through which the tab 38 extends and which is supported on both ends on a spherical cap-shaped support disk 60, which in turn abuts on the rocker 52 or on the pivot lever 24.
  • the support disks 60 each have a slot-shaped recess 62 for the tab 38.
  • the contact pressure spring assembly 26 operates as follows. When the follower 36 is in the upper end position and the corresponding movable switching contact 20 is in the switched-off position, the contact pressure spring 58 presses the pivoting lever 24 downward at the end on this side until the bolt 42 is in contact with the lower end of the passage 40. In the course of a rotation of the disks 32 clockwise by 210 °, the follower 36 into the lower one shown in the figures Moved to the end position, the pivot lever 24 pivots under the pressure of the prestressed contact pressure spring 58 in a clockwise direction until the movable switching contact 20 is in contact with the fixed switching contact 16.
  • a spring hub 64 is also non-rotatably seated on the drive shaft 28, to which the inner end 66 of a spiral spring 68 is fastened.
  • the outer end 70 of the spiral spring 68 is connected to a spring cage 72 which surrounds the spiral spring 68 in a sleeve-like manner and is connected in a rotationally fixed manner to a toothed wheel 74 which is freely rotatably mounted on the spring hub 64.
  • the spring hub 64 When viewed in the radial direction, the spring hub 64 has a thicker wall in the area of the spiral spring 68 than in the section adjacent thereto in the radial direction in which the gear wheel 74 is arranged.
  • a roller bearing 80 for the gearwheel 70 is located between the shoulder 76 of the spring hub 64 formed in this way and a sleeve 78 placed on the drive shaft 28 at this end, which roller bearing 80 is also held immovably in the axial direction by this shoulder 76 and the sleeve 78.
  • the gear 74 meshes with the driven gear 82 one means an electric motor 84 driven reduction gear 86 ( Figure 1).
  • the rotation of the spring cage 72 against the winding direction of the spiral spring 68 is prevented by a freewheel or a backstop, not shown, which acts on a shaft of the reduction gear 86.
  • each double lever 88, 90 On the drive shaft 68 there are two single-armed double levers 88, 90 which are staggered relative to one another and which each cooperate with a support element 92 or 94. At the free end of each double lever 88.90, a support roller 88 'or 90' is held by means of a bolt 96. In the switch-on position shown in the figures, the support roller 80 'is supported against the force of the spiral spring 68 on the end face 98' of a double-arm support lever 98 of the support member 92 which is pivotably mounted on the chassis 46.
  • the end face 98 ' is inclined with respect to the support roller 88' in such a way that the support lever 98 experiences a force acting in the clockwise direction, the support lever 98 being secured in the switched-on position at its end opposite the end face 98 'by means of a support shaft 100 against rotation.
  • the support shaft 100 is also pivotally mounted on the chassis 46 and is connected in a rotationally fixed manner to a two-armed actuating lever 102.
  • the support shaft 100 has a segment-shaped milling 104 through which the support lever 98 can pivot by hand when the support shaft 100 is pivoted clockwise by means of a switch-off button 106 or electrically by means of a switch-off magnet 108.
  • the support member 94 is constructed exactly the same as the support member 92 and is therefore no longer described in detail.
  • the support lever 110 is also supported on a support shaft 100 ', which has a corresponding chamfer 104' through which the support lever 100 can pivot when the support shaft 110 is rotated clockwise.
  • the support shaft 100 ' can also be pivoted clockwise via a double-armed actuating lever 102' by means of a switch 106 'by hand or electrically via a switch magnet 108'.
  • the drive shaft 28 has an essentially square cross section (FIG. 2) and has a thread 112 at each of its two ends (FIG. 3) onto which a nut 114 is screwed.
  • the chassis 46 has two spaced apart and parallel bearing plates 46 ', through which the drive shaft 28 is guided and on which the drive shaft 28 is rotatably supported by means of ball bearings 116. Depending on the outside of the relevant bearing plates 46 'sit on the shaft, the two disks 32 of the cam plate assemblies 30 for the two outer vacuum interrupters 12.
  • each cam disk arrangement 30 is spaced apart from one another by spacer sleeves 118 (FIG. 3), and further spacer sleeves 118 'are provided between the two outer cam disk arrangements 30 and the relevant ball bearing 116 or the relevant nut 114.
  • the double levers 88, 90 are welded to tubes 120, which have a free inner cross section which corresponds to the cross section of the drive shaft 28.
  • the free inner cross section of the spring hub 64 and the passages 122 in the disks 32 is also adapted to the cross section of the drive shaft 28 in order to connect them to one another in a rotationally fixed manner. All parts seated on the drive shaft 28 are held in the axial direction by means of the two nuts 114.
  • An auxiliary switch 124 which is only shown schematically, is also provided in the spring-loaded drive 10, the movable contact of which can be actuated via the bead 48 of a disk 32 in question.
  • the auxiliary switch 124 is thus closed or opened depending on the respective rotational position of the drive shaft 28.
  • the auxiliary switch 124 is required for feedback purposes or for electrical locking of the spring-loaded drive 10.
  • the assembly of the spring force drive 10 is very simple.
  • the next drive elements are plugged onto the drive shaft 28 and at the end these are braced against one another by means of the nuts 114.
  • the spring force drive 10 operates as follows. In the switch-on position shown in the figures, the spiral spring 68 by means of the electric motor 84 via the reduction gear 86, the gear 74 and the spring cage 72 clockwise by 360 °. The drive shaft 28 is prevented from rotating by the support member 92. In order to switch off the circuit breaker, the support shaft 100 is pivoted clockwise by hand by actuating the switch-off button 106 or electrically by activating the switch-off relay 108 in a clockwise direction. The support shaft 100 releases the support lever 98 which, as a result of the pressing force of the support roller 88 ', swivels clockwise through the milling 104.
  • the drive shaft 28 is released, which rotates clockwise by 150 ° under the force of the spiral spring 68 until the support roller 90 'of the double lever 90 comes to rest on the support lever 110.
  • the follower 36 is pulled upwards through the groove 34 into the upper end position. This movement is transmitted via the tab 38, the pivot lever 24 and the switching plunger 18 to the movable switching contact 20, which is moved into the off position.
  • the contact pressure spring 58 relaxes until the bolt 42 is in contact with the lower end of the passage 40.
  • the energy released by the spiral spring 68 and the contact pressure spring 58 is converted into kinetic energy, which is used, if appropriate, to detach switch contacts 16, 20 welded to one another. Under the force of the spiral spring 68, the movable switching contacts 20 are transferred to the off position.
  • the support shaft 100 ' is swiveled clockwise by the user by pressing the switch 106' or electrically by activating the switch-on relay 108 '.
  • the support lever 110 and thus the double lever 90 are released in a corresponding manner.
  • the drive shaft 28 rotates through 210 ° until the support roller 80 'of the double lever 88 strikes the support lever 98 of the support member 92.
  • the follower 36 is transferred from the upper end position into the lower end position shown in the figures and the switch into the switch-on position.
  • the contact pressure spring 58 is tensioned.
  • part of the energy to be released by the spiral spring 68 is first converted into kinetic energy in order to achieve the desired stroke-time profile of the movable switching contact 20.
  • the spiral spring 68 is in turn pulled up by 360 °.
  • the coil spring 68 is preloaded to such an extent that when the coil spring 68 is fully opened, the stored energy is sufficient for a reclosure to switch on and reclosure, with the spring cage 72 again rotating 360 as soon as the on position is reached ° is driven.
  • the follower 36 is inevitably guided in the grooves 34, whereby a positive connection is formed with respect to the direction of movement of the tab 38 between the follower 36 and the washers 32.
  • the position of the movable switching contact 20 thus always corresponds to the position of the drive shaft 28, corrected in each case by the differential stroke absorbed by the contact pressure spring 58 or the passage 40.
  • the end shields 46 ' can be formed on an insulating support frame, which at least partially encompasses the vacuum interrupters 12 and to which the vacuum interrupters 12 can be attached.
  • an insulating support frame which at least partially encompasses the vacuum interrupters 12 and to which the vacuum interrupters 12 can be attached.
  • the follower is arranged on a pivot lever. It is also possible to couple the tab directly to the contact plunger without a pivoting lever if the spring-loaded drive 10 and the vacuum interrupters are mutually corresponding Have location. Instead of vacuum interrupters, other interrupters can also be provided. By replacing individual drive elements, the spring-loaded drive can be adapted to the requirements of a wide variety of interrupters.

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  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
  • High-Tension Arc-Extinguishing Switches Without Spraying Means (AREA)
  • Transmission Devices (AREA)

Abstract

Two discs (32) per vacuum switching tube (12) are seated on the input drive shaft (28), which discs (32) have slots (34) extending circumferentially around the input drive shaft (28) and open with respect to one another. In the slots (34) of two adjacent discs (32) there is guided a cylindrical follower element (36) whose movement is transmitted via a strap (38) onto the pivoting lever (24) and to the movable switching contact (20). In the switched-on and switched-off positions, the input drive shaft (28) is supported via a detachable supporting device (92, 94), driven clockwise by the spiral spring (68) in order to switch the circuit breaker on or off. The follower element (36) is forcibly guided in the slots (34) of the discs (32), as a result of which the position of the movable switching contact (20) is forced to coincide with the corresponding rotational position of the input drive shaft (28). <IMAGE>

Description

Die vorliegende Erfindung betrifft einen Federkraftantrieb für einen Leistungsschalter, insbesondere einen Vakuum­schalter für Mittelspannung, gemäss dem Oberbegriff des Anspruchs 1.The present invention relates to a spring force drive for a circuit breaker, in particular a vacuum switch for medium voltage, according to the preamble of claim 1.

Ein solcher Federkraftantrieb für einen Vakuum- Leistungs­schalter für Mittelspannung ist in den Calor- Emag- Mit­teilungen I/II/1986 auf den Seiten 9 bis 12 beschrieben. Dieser bekannte Federkraftantrieb weist eine Antriebswelle auf, die von einer Spiralfeder zum Ein- und Ausschalten des Leistungsschalters in derselben Drehrichtung angetrie­ben ist. Auf der Antriebswelle sitzt drehfest eine Ab­stützscheibe mit zwei Abstützflächen, die in der Ein­schalt- bzw. Ausschaltstellung der Antriebswelle mit einem ortsfesten, schwenkbar gelagerten Abstützorgan zusammen wirken. Auf der Antriebswelle sitzt ebenfalls drehfest pro Pol je eine Kurvenscheibe deren Umfangsfläche eine Steuer­kurve für eine am einen Ende eines Schwenkhebels angeord­nete Folgerolle bildet. Das andere Ende des Schwenkhebels ist über eine Kontaktdruckfederanordnung mit dem beweg­baren Schaltkontakt einer Vakuumschaltröhre verbunden. Auf den Schwenkhebel wirkt ebenfalls eine Ausschaltfeder ein, die die Folgerolle gegen die Umfangsfläche der Kurven­scheibe drückt. Zum Einschalten des Leistungsschalters gibt das Abstützorgan die Abstützscheibe und somit die An­triebswelle für eine Drehung um 270° frei, wodurch der be­wegbare Schaltkontakt über die druckwirksam auf die Folge­rolle einwirkende Kurvenscheibe und den Schwenkhebel in die Einschaltstellung gebracht wird. Dabei wird sowohl die Kontaktdruckfederanordnung als auch die Ausschaltfeder ge­spannt. Um den Leistungsschalter auszuschalten, gibt das Abstützorgan die Abstützscheibe für eine Drehung von 90° frei. Dabei wird der Schwenkhebel und der bewegbare Schaltkontakt durch die Ausschaltfeder entsprechend der Form der Umfangsfläche in die Ausschaltstellung zurückge­bracht, wobei die Bewegung des Schwenkhebels durch die Kurvenscheibe bestimmt ist, gegen deren Umfangsfläche die Folgerolle von der Ausschaltfeder gedrückt wird. Um in jedem Fall auch bei verschweissten Schaltkontakten ein sicheres Ausschalten zu gewährleisten, sind die Ausschalt­federn erheblich stärker dimensioniert als dies für das Erreichen der erforderlichen Geschwindigkeit des beweg­baren Schaltkontaktes notwendig wäre. Dies bedingt, dass für das Schalten grosse Energien zur Verfügung gestellt werden müssen, was im Antrieb grosse Kräfte und eine ent­sprechende Dimensionierung hervorruft.Such a spring drive for a vacuum circuit breaker for medium voltage is described in the Calor-Emag-Mitteilungen I / II / 1986 on pages 9 to 12. This known spring force drive has a drive shaft which is driven by a spiral spring for switching the circuit breaker on and off in the same direction of rotation. A support disc with two support surfaces sits on the drive shaft in a rotationally fixed manner, which cooperate with a fixed, pivotably supported support member in the switch-on or switch-off position of the drive shaft. On the drive shaft there is also a cam for each pole, the circumferential surface of which forms a control cam for a follower roller arranged at one end of a pivoting lever. The other end of the pivot lever is connected to the movable switching contact of a vacuum interrupter via a contact pressure spring arrangement. A switch-off spring also acts on the swivel lever, which presses the follower roller against the circumferential surface of the cam disk. To switch on the circuit breaker, the support element releases the support plate and thus the drive shaft for a rotation of 270 °, whereby the movable switching contact is brought into the switch-on position via the cam plate acting on the follower roller and the swivel lever. Both Contact pressure spring assembly as well as the opening spring tensioned. In order to open the circuit breaker, the support element releases the support disc for a rotation of 90 °. The swivel lever and the movable switching contact are returned to the switch-off position by the switch-off spring according to the shape of the circumferential surface, the movement of the swivel lever being determined by the cam disc, against the circumferential surface of which the follower roller is pressed by the switch-off spring. In order to ensure a safe switch-off even in the case of welded switch contacts, the switch-off springs are dimensioned much stronger than would be necessary to achieve the required speed of the movable switch contact. This means that large energies must be made available for switching, which causes large forces and a corresponding dimensioning in the drive.

Es ist somit eine Aufgabe der vorliegenden Erfindung einen gattungsgemässen Antrieb für einen Leistungsschalter zu schaffen, der mit gegenüber dem Stand der Technik kleine­ren Energiemengen den Leistungsschalter zuverlässig an­treibt.It is therefore an object of the present invention to provide a generic drive for a circuit breaker that reliably drives the circuit breaker with smaller amounts of energy than the prior art.

Diese Aufgabe wird durch die Merkmale des kennzeichnenden Teiles des Anspruchs 1 gelöst.This object is achieved by the features of the characterizing part of claim 1.

Dadurch dass die Kurvenscheibenanordnung mit dem Hubglied sowohl druck- wie auch zugwirksam verbunden ist, ist keine separate Ausschaltfeder notwendig, sondern eine einzige auf die Antriebswelle einwirkende Federanordnung bewerk­stelligt das Einschalten sowie das Ausschalten des Lei­ stungsschalters. Dadurch sind erheblich kleinere Kräfte zu übertragen. Beim Ausschalten wird, durch eine entsprechen­de Form der Steuerkurve, über einen ersten Teil des Aus­schaltdrehwinkels der Antriebswelle die von der Federan­ordnung abgegebene Energie durch Drehen der Antriebswelle und aller mit dieser drehfest verbundenen Teile in kine­tische Energie umgesetzt. Diese kinetische Energie und die Kraft der Federanordnung trennt in jedem Fall auch mitein­ander verschweisste Schaltkontakte voneinander. Durch die druck- und zugwirksame Verbindung zwischen der Kurven­scheibenanordnung und dem Hubglied wird auf jeden Fall sichergestellt, dass die Stellung des bewegbaren Schalt­kontaktes mit der entsprechenden Stellung der Antriebs­welle übereinstimmt.Due to the fact that the cam disk arrangement is connected to the lifting member both in terms of pressure and pull, no separate switch-off spring is necessary, but a single spring arrangement acting on the drive shaft accomplishes the switching on and switching off of the Lei control switch. This means that considerably smaller forces can be transmitted. When switching off, the energy emitted by the spring arrangement is converted into kinetic energy over a first part of the switch-off rotation angle of the drive shaft by rotating the drive shaft and all parts connected to it in a rotationally fixed manner by means of a corresponding shape of the control curve. In any case, this kinetic energy and the force of the spring arrangement also separate switch contacts welded to one another. The pressure and tensile connection between the cam disk arrangement and the lifting element ensures in any case that the position of the movable switching contact corresponds to the corresponding position of the drive shaft.

Eine besonders einfache zug- und druckwirksame Verbindung zwischen der Kurvenscheibenanordnung und dem Hubglied wird bei einer Ausführungsform gemäss Anspruch 2 erzielt.A particularly simple tensile and pressure-effective connection between the cam disk arrangement and the lifting member is achieved in one embodiment according to claim 2.

Eine Ausführungsform gemäss Anspruch 3 führt zu einem ruhigen spielfreien Bewegungsverlauf.An embodiment according to claim 3 leads to a smooth, play-free movement.

Bei mehrpoligen Leistungsschaltern ist es vorteilhaft, pro Pol eine Kurvenscheibenanordnung und ein mit dem bewegba­ren Schaltkontakt des betreffenden Poles wirkverbundenes Hubglied vorzusehen. Dadurch sind die pro Kurvenscheibe zu übertragenden Kräfte minimal.In the case of multi-pole circuit breakers, it is advantageous to provide a cam disk arrangement per pole and a lifting element which is operatively connected to the movable switching contact of the pole in question. As a result, the forces to be transmitted per cam are minimal.

Bei Ausführungsformen des Federkraftantriebes gemäss den Ansprüchen 5 und 6 können auf das Hubglied einwirkende Querkräfte vermieden werden.In embodiments of the spring force drive according to claims 5 and 6, transverse forces acting on the lifting member can be avoided.

Ein besonders einfach montierbarer Federkraftantrieb wird durch die Ausbildungsform gemäss Anspruch 12 erzielt. Durch den sehr einfach möglichen Austausch von auf der An­triebswelle sitzenden Elementen kann der Antrieb an ver­schiedene Bedürfnisse angepasst werden. So können bei­spielsweise bei einer Ausführungsform gemäss Anspruch 13 durch Austauschen von Abstützhebeln die Drehwinkel zwi­schen der Ausschaltung und der Einschaltstellung frei ge­wählt werden.A particularly easy to install spring force drive is achieved by the embodiment according to claim 12. The drive can be adapted to different needs by the very simple exchange of elements sitting on the drive shaft. For example, in one embodiment according to claim 13, the angle of rotation between the switch-off and the switch-on position can be freely selected by exchanging support levers.

Wie dies im Anspruch 15 angegeben ist, eignet sich der Federkraftantrieb besonders gut für eine Schalteranord­nung, wie sie in der CH-Patentanmeldung Nr. 02 283/88 bzw. der entsprechenden US-Patentanmeldung Nr. 07/361 257 ange­gebenen ist.As stated in claim 15, the spring force drive is particularly well suited for a switch arrangement as specified in CH patent application No. 02 283/88 or the corresponding US patent application No. 07/361 257.

Weitere bevorzugte Ausbildungsformen sind in den weiteren Ansprüchen angegeben.Further preferred forms of training are specified in the further claims.

Die vorliegende Erfindung wird nun anhand eines in den Fi­guren dargestellten Ausführungsbeispiels näher beschrie­ben.The present invention will now be described with reference to an embodiment shown in the figures.

Es zeigen rein schematisch:

  • Fig. 1 in perspektivischer Darstellung vereinfacht einen Federkraftantrieb; und
  • Fig. 2 und 3 teilweise geschnitten in Seitenansicht bzw. in einem Längsschnitt entlang der Linie III-III der Fig. 2 denselben Schalteran­trieb.
It shows purely schematically:
  • Fig. 1 in perspective representation simplified a spring force drive; and
  • Fig. 2 and 3 partially sectioned in side view or in a longitudinal section along the line III-III of Fig. 2 the same switch drive.

Wie dies insbesondere aus der Figur 1 hervor geht, weist der Leistungsschalter für Mittelspannung einen Federan­trieb 10 und drei von diesem angetriebene Vakuumschalt­röhren 12 auf. Die Vakuumschaltröhren 12 und die Verbin­dungsgestänge 14 zwischen den jeweiligen Vakuumschalt­röhren 12 und dem Antrieb 10 sind indentisch aufgebaut und werden anhand des in den Figuren 1 und 3 ganz links und in der Figur 2 dargestellten Poles beschrieben.As can be seen in particular from FIG. 1, the circuit breaker for medium voltage has a spring drive 10 and three vacuum interrupters 12 driven by it. The vacuum interrupters 12 and the connecting linkage 14 between the respective vacuum interrupters 12 and the drive 10 are constructed identically and are described using the pole shown on the far left in FIGS. 1 and 3 and in FIG. 2.

Jede Vakuumschaltröhre 12 weist einen gestrichel ange­deuteten feststehenden Schaltkontakt 16 und einen am oberen Ende eines Schaltstössels 18 angeordneten beweg­baren Schaltkontakt 20 auf (Figur 1). Im unteren Endbe­reich ist der Schaltstössel 18 über einen Stift 22 mit einem doppelarmigen Schwenkhebel 24 gelenkig verbunden, welcher andernends über eine Kontaktdruckfederanordnung 26 mit einer auf einer Antriebswelle 28 des Federkraftan­triebes 10 sitzenden Kurvenscheibenanordnung 30 wirkver­bunden ist.Each vacuum interrupter 12 has a stationary switching contact 16 indicated by a broken line and a movable switching contact 20 arranged at the upper end of a switching plunger 18 (FIG. 1). In the lower end region, the switching plunger 18 is connected in an articulated manner via a pin 22 to a double-armed pivot lever 24, which at the other end is operatively connected via a contact pressure spring arrangement 26 to a cam arrangement 30 seated on a drive shaft 28 of the spring-loaded drive 10.

Jede der drei Kurvenscheibenanordnungen 30 weist zwei von­einander beabstandete und gegengleich ausgebildete Schei­ben 32 auf, in welche je eine um die Antriebswelle 28 her­umlaufende Nut 34 eingeprägt ist, wobei die Nuten 34 in Richtung der Achse 28′ der Antriebswelle 28 und gegenein­ander offen sind, siehe insbesondere Figur 3. In den Nuten 34 ist ein zylinderförmiges und parallel zur Antriebswelle 28 verlaufendes Folgeglied 36 geführt, das an einer bezüg­lich der Antriebswelle 28 ungefähr in radialer Richtung verlaufenden Lasche 38 angeordnet ist. Am vom Folgeglied 36 entfernte Ende weist die Lasche 38 einen in Längsrich­tung der Lasche 38 länglichen Durchlass 40 auf, wie dies insbesondere aus der Figur 1 in den beiden nur teilweise dargestellten Laschen 38 für die mittlere und rechts dar­gestellte Schaltröhre 12 und den Figuren 2 und 3 hervor­geht. Durch den Durchlass 40 hindurch ist ein parallel zum Folgeglied 36 verlaufender Bolzen 42 geführt, welcher an den beiden voneinander beabstandenden und zueinander pa­rallel verlaufenden Hebeln 24′ des Schwenkhebels 24 be­festigt ist. Die Lasche 38 sowie der Kontaktstössel 18 verlaufen zwischen den beiden Hebel 24′ welche mittels eines Schwenkbolzens 44 an einem Chassis 46 schwenkbar ge­lagert sind (siehe insbesondere Figur 2).Each of the three cam disk arrangements 30 has two spaced apart and oppositely formed disks 32, in each of which a groove 34 is stamped around the drive shaft 28, the grooves 34 being open in the direction of the axis 28 'of the drive shaft 28 and against one another, see in particular Figure 3. In the grooves 34, a cylindrical and parallel to the drive shaft 28 follower 36 is guided, which is arranged on a bracket 38 extending approximately in the radial direction with respect to the drive shaft 28. At the end remote from the follower 36, the tab 38 has an elongate passage 40 in the longitudinal direction of the tab 38, as is the case here in particular from Figure 1 in the two only partially shown tabs 38 for the middle and right switching tube 12 and Figures 2 and 3. Through the passage 40 a parallel to the follower 36 bolt 42 is guided, which is attached to the two spaced and mutually parallel levers 24 'of the pivot lever 24. The tab 38 and the contact plunger 18 run between the two levers 24 'which are pivotally mounted on a chassis 46 by means of a pivot pin 44 (see in particular Figure 2).

Die Scheiben 32 sind aus einem Blech ausgestanzt und im gleichen Arbeitsgang sind die Nuten 34 eingeprägt wobei sich auf der jeweils der Nut 34 gegenüberliegenden Seite der Scheibe 32 vorstehende Wülste 48 ausbilden. Wie dies insbesondere aus der Figur 2 hervorgeht umlaufen die Nuten 34 die Antriebswelle 28 ungefähr exzenterförmig, wobei sich in der in den Figuren dargestellten Drehposition der Scheiben 32 der grösste Abstand zwischen der Nut 34 und der Achse 28′ der Antriebswelle 28 in Richtung von dieser Achse 28′ zum Folgeglied 36 befindet. Die Richtung des kürzesten Abstandes ist in der Figur 2 strichpunktiert eingezeichnet, mit 50 bezeichnet und befindet sich im Ge­genuhrzeigersinn gesehen ungefähr um 150° gegenüber dem Folgeglied 36 versetzt. In der in den Figuren dargestell­ten Lage der Scheiben 32 befindet sich das Folgeglied 36 in der unteren Endlage in welcher der Schwenkhebel 24, wie dies mit ausgezogenen Linien in der Figur 2 dargestellt ist, im Uhrzeigersinn verschwenkt und der bewegbare Schaltkontakt 28 in Einschaltstellung gebracht ist. Sind hingegen die Scheiben 32 im Uhrzeigersinn um 150° ver­ dreht, so dass sich der kürzeste Abstand 50 zwischen dem Folgeglied 36 und der Achse 28′ befindet, ist das Folge­glied 36 in seine obere Endlage angehoben in welcher sich der Schwenkhebel im Gegenuhrzeigersinn verschwenkt in der gestrichelt dargestellten Lage 24˝ befindet, dabei ist der Leistungsschalter ausgeschaltet.The disks 32 are punched out of sheet metal and the grooves 34 are embossed in the same operation, with protruding beads 48 being formed on the side of the disk 32 opposite the groove 34 in each case. As can be seen in particular from FIG. 2, the grooves 34 run approximately eccentrically in the drive shaft 28, the greatest distance between the groove 34 and the axis 28 'of the drive shaft 28 in the direction of this axis in the rotational position of the disks 32 shown in the figures 28 'to the follower 36 is located. The direction of the shortest distance is shown in dash-dotted lines in FIG. 2, designated by 50 and, viewed in the counterclockwise direction, is offset by approximately 150 ° with respect to the follower 36. In the position of the disks 32 shown in the figures, the follower 36 is in the lower end position in which the pivot lever 24, as shown in solid lines in FIG. 2, is pivoted clockwise and the movable switching contact 28 is brought into the switched-on position. However, the disks 32 are clockwise by 150 ° rotates so that the shortest distance 50 is between the follower 36 and the axis 28 ', the follower 36 is raised to its upper end position in which the pivot lever is pivoted counterclockwise in the position 24˝ shown in dashed lines, the circuit breaker switched off.

Benachbart zum Folgeglied 36 ist die Lasche 38 mit einer Schwinge 52 gelenkig verbunden, welche ungefähr parallel zum Schwenkhebel 24 verläuft und an ihrem von der Lasche 38 entfernten Ende ebenfalls am Chassis 46 mittels einer Welle 54 schwenkbar gelagert ist. Die Schwinge 52 weist zwei voneinander beabstandete und parallel zueinander ver­laufende Schwinghebel 52′ auf, welche beidseits der Lasche 38 verlaufen und über einen Stift 56 mit dieser verbunden sind. Zwischen der Schwinge 52 und dem Schwenkhebel 24 be­findet sich eine Kontaktdruckfeder 58 durch welche hin­durch die Lasche 38 verläuft und welche sich beiderends an je einer kugelkalottenförmigen Stützscheibe 60 abstützt, welche ihrerseits an der Schwinge 52 bzw. am Schwenkhebel 24 anstehen. Die Stützscheiben 60 weisen je eine schlitz­förmige Ausnehmung 62 für die Lasche 38 auf.Adjacent to the follower 36, the link 38 is articulated to a rocker 52, which runs approximately parallel to the pivot lever 24 and is also pivotally mounted on the chassis 46 by means of a shaft 54 at its end remote from the link 38. The rocker 52 has two spaced-apart and parallel to each other rocker arms 52 ', which extend on both sides of the tab 38 and are connected to it via a pin 56. Between the rocker 52 and the pivot lever 24 there is a contact pressure spring 58 through which the tab 38 extends and which is supported on both ends on a spherical cap-shaped support disk 60, which in turn abuts on the rocker 52 or on the pivot lever 24. The support disks 60 each have a slot-shaped recess 62 for the tab 38.

Die Kontaktdruckfederanordnung 26 arbeitet wie folgt. Bei sich in der oberen Endlage befindendem Folgeglied 36 und dem entsprechend sich in Ausschaltstellung befindenden bewegbaren Schaltkontakt 20 drückt die Kontaktdruckfeder 58 über die untere Stützscheibe 60 den Schwenkhebel 24 am diesseitigen Ende soweit nach unten bis der Bolzen 42 am unteren Ende des Durchlass 40 ansteht. Wird im Zuge einer Verdrehung der Scheiben 32 im Uhrzeigersinn um 210° das Folgeglied 36 in die in den Figuren dargestellte untere Endlage verschoben, verschwenkt sich der Schwenkhebel 24 unter dem Druck der vorgespannten Kontaktdruckfeder 58 im Uhrzeigersinn bis der bewegbare Schaltkontakt 20 am fest­stehenden Schaltkontakt 16 ansteht. Beim weiter verschie­ben des Folgegliedes 36 gegen unten wird die Kontaktdruck­feder 58 in Folge der Relativbewegung zwischen dem nun stillstehenden Schwenkhebel 24 und der mit der Lasche 38 mitbewegten Schwinge 52 weiter gespannt, wodurch die Kraft mit welcher die beiden Schaltkontakte 16,20 gegeneinander gepresst werden erhöht wird. In der Einschaltstellung be­findet sich der Bolzen 42 im oberen Endbereich des Durch­lasses 40, wie dies insbesondere aus den Figuren 2 und 3 deutlich hervorgeht.The contact pressure spring assembly 26 operates as follows. When the follower 36 is in the upper end position and the corresponding movable switching contact 20 is in the switched-off position, the contact pressure spring 58 presses the pivoting lever 24 downward at the end on this side until the bolt 42 is in contact with the lower end of the passage 40. In the course of a rotation of the disks 32 clockwise by 210 °, the follower 36 into the lower one shown in the figures Moved to the end position, the pivot lever 24 pivots under the pressure of the prestressed contact pressure spring 58 in a clockwise direction until the movable switching contact 20 is in contact with the fixed switching contact 16. When the follower member 36 is moved further downward, the contact pressure spring 58 is further tensioned as a result of the relative movement between the now pivoting lever 24 and the rocker 52 moved with the link 38, whereby the force with which the two switching contacts 16, 20 are pressed against one another is increased . In the switched-on position, the bolt 42 is located in the upper end region of the passage 40, as can be seen particularly clearly from FIGS. 2 and 3.

Auf der Antriebswelle 28 sitzt ebenfalls drehfest eine Federnabe 64 an welcher das innere Ende 66 einer Spiral­feder 68 befestigt ist. Das äussere Ende 70 der Spiralfe­der 68 ist mit einem Federkäfig 72 verbunden, welcher die Spiralfeder 68 büchsenförmig umgreift und mit einem auf der Federnabe 64 freidrehbar gelagerten Zahnrad 74 dreh­fest verbunden ist. Die Federnabe 64 weist im Bereich der Spiralfeder 68 in radialer Richtung gesehen eine dickere Wandung auf, als im dazu in radialer Richtung angrenzenden Abschnitt in welchem das Zahnrad 74 angeordnet ist. Zwi­schen dem so gebildeten Absatz 76 der Federnabe 64 und einer am diesseitigen Ende auf die Antriebswelle 28 auf­gesetzten Hülse 78 befindet sich ein Rollenlager 80 für das Zahnrad 70, welches auch durch diesen Absatz 76 und die Hülse 78 in axialer Richtung unverschiebbar gehalten ist.A spring hub 64 is also non-rotatably seated on the drive shaft 28, to which the inner end 66 of a spiral spring 68 is fastened. The outer end 70 of the spiral spring 68 is connected to a spring cage 72 which surrounds the spiral spring 68 in a sleeve-like manner and is connected in a rotationally fixed manner to a toothed wheel 74 which is freely rotatably mounted on the spring hub 64. When viewed in the radial direction, the spring hub 64 has a thicker wall in the area of the spiral spring 68 than in the section adjacent thereto in the radial direction in which the gear wheel 74 is arranged. A roller bearing 80 for the gearwheel 70 is located between the shoulder 76 of the spring hub 64 formed in this way and a sleeve 78 placed on the drive shaft 28 at this end, which roller bearing 80 is also held immovably in the axial direction by this shoulder 76 and the sleeve 78.

Das Zahnrad 74 kämmt mit dem Abtriebsrad 82 eines mittels eines Elektromotores 84 angetriebenen Untersetzungsgetrie­bes 86 (Figur 1). Das Drehen des Federkäfigs 72 entgegen der Aufzugsrichtung der Spiralfeder 68 wird durch einen nicht dargestellten Freilauf bzw. eine Rücklaufsperre unterbunden, welcher auf eine Welle des Untersetzungsge­triebes 86 einwirkt.The gear 74 meshes with the driven gear 82 one means an electric motor 84 driven reduction gear 86 (Figure 1). The rotation of the spring cage 72 against the winding direction of the spiral spring 68 is prevented by a freewheel or a backstop, not shown, which acts on a shaft of the reduction gear 86.

Auf der Antriebswelle 68 sitzen weiter drehfest zwei ge­geneinander versetzt angeordnete einarmige Doppelhebel 88,90, welche je mit einem Abstützorgan 92 bzw. 94 zu­sammenwirken. Am freien Ende jedes Doppelhebels 88,90 ist eine Abstützwalze 88′ bzw. 90′ mittels eines Bolzens 96 gehalten. In der in den Figuren dargestellten Einschalt­stellung stützt sich die Abstützwalze 80′ entgegen der Kraft der Spiralfeder 68 an der Stirnfläche 98′ eines am Chassis 46 schwenkbar gelagerten doppelarmigen Abstützhe­bels 98 des Abstützorganes 92 ab. Die Stirnfläche 98′ ist bezüglich der Abstützwalze 88′ derart geneigt, dass der Abstützhebel 98 eine im Uhrzeigersinn wirkende Kraft er­fährt, wobei der Abstützhebel 98 in der Einschaltstellung an seinem der Stirnfläche 98′ entgegengesetzten Ende mittels einer Abstützwelle 100 gegen Verdrehen gesichert ist. Die Abstützwelle 100 ist ebenfalls am Chassis 46 schwenkbar gelagert und drehfest mit einem zweiarmigen Betätigungshebel 102 verbunden. Die Abstützwelle 100 weist im Bereich des Abstützhebels 98 eine segmentförmige An­fräsung 104 auf, durch welche hindurch sich der Abstütz­hebel 98 beim Verschwenken der Abstützwelle 100 im Uhr­zeigersinn von Hand mittels einer Ausschalttaste 106 oder elektrisch mittels eines Ausschaltmagnets 108, verschwen­ken kann. Dadurch wird die Antriebswelle 28 freigegeben und diese kann sich unter der Wirkung der Spiralfeder 68 im Uhrzeigersinn drehen bis die Abstützwalze 90′ des Doppelhebels 90 an der entsprechenden Stirnfläche 110′ des Abstützhebels 110 des Abstützorganes 94 zur Anlage kommt. Das Abstützorgan 94 ist genau gleich aufgebaut wie das Abstützorgan 92 und wird deshalb nicht mehr näher be­schrieben. Der Abstützhebel 110 ist ebenfalls an einer Abstützwelle 100′ abgestützt, welche eine entsprechende Anfräsung 104′ aufweist, durch welche hindurch sich beim Verdrehen der Abstützwelle 110 im Uhrzeigersinn der Ab­stützhebel 100 verschwenken kann. Die Abstützwelle 100′ ist ebenfalls über einen doppelarmigen Betätigungshebel 102′ mittels einer Einschalttaste 106′ von Hand oder elektrisch über einen Einschaltmagnet 108′ im Uhrzeigersinn verschwenkbar.On the drive shaft 68 there are two single-armed double levers 88, 90 which are staggered relative to one another and which each cooperate with a support element 92 or 94. At the free end of each double lever 88.90, a support roller 88 'or 90' is held by means of a bolt 96. In the switch-on position shown in the figures, the support roller 80 'is supported against the force of the spiral spring 68 on the end face 98' of a double-arm support lever 98 of the support member 92 which is pivotably mounted on the chassis 46. The end face 98 'is inclined with respect to the support roller 88' in such a way that the support lever 98 experiences a force acting in the clockwise direction, the support lever 98 being secured in the switched-on position at its end opposite the end face 98 'by means of a support shaft 100 against rotation. The support shaft 100 is also pivotally mounted on the chassis 46 and is connected in a rotationally fixed manner to a two-armed actuating lever 102. In the area of the support lever 98, the support shaft 100 has a segment-shaped milling 104 through which the support lever 98 can pivot by hand when the support shaft 100 is pivoted clockwise by means of a switch-off button 106 or electrically by means of a switch-off magnet 108. As a result, the drive shaft 28 is released and this can move under the action of the spiral spring 68 turn clockwise until the support roller 90 'of the double lever 90 on the corresponding end face 110' of the support lever 110 of the support member 94 comes to rest. The support member 94 is constructed exactly the same as the support member 92 and is therefore no longer described in detail. The support lever 110 is also supported on a support shaft 100 ', which has a corresponding chamfer 104' through which the support lever 100 can pivot when the support shaft 110 is rotated clockwise. The support shaft 100 'can also be pivoted clockwise via a double-armed actuating lever 102' by means of a switch 106 'by hand or electrically via a switch magnet 108'.

Die Antriebswelle 28 besitzt einen im wesentlichen qua­dratischen Querschnitt (Figur 2) und weist an seinen bei­den Enden je ein Gewinde 112 auf (Figur 3) auf welches je eine Mutter 114 geschraubt ist. Das Chassis 46 weist zwei voneinander beabstandete und parallel zueinander verlau­fende Lagerschilder 46′ auf, durch welche hindurch die Antriebswelle 28 geführt ist und an welchem die Antriebs­welle 28 mittels Kugellagern 116 freidrehbar gelagert ist. Je auf der Aussenseite der betreffenden Lagerschilder 46′ sitzen auf der Welle die beiden Scheiben 32 der Kurven­scheibenanordnungen 30 für die beiden äusseren Vakuum­schaltröhren 12. Zwischen den beiden Lagerschildern 46′ sind auf der Antriebswelle 28 die beiden Doppelhebel 88,90 und zwischen diesen die beiden Scheiben 32 der Kurven­scheibenanordnung 30 für die mittlere Vakuumschaltröhre 12 und die Federnabe 64 mit der Spiralfeder 68 dem Federkäfig 72 und dem Zahnrad 74 angeordnet. Die Scheiben 32 jeder Kurvenscheibenanordnung 30 sind voneinander durch Distanzhülsen 118 beabstandet (Figur 3), und zwischen den beiden aussenliegenden Kurvenscheibenanordnungen 30 und dem betreffenden Kugellager 116 bzw. der betreffenden Mutter 114 sind weiter Distanzhülsen 118′ vorgesehen. Die Doppelhebel 88,90 sind an Rohren 120 angeschweisst, welche einen freien inneren Querschnitt aufweisen welcher dem Querschnitt der Antriebswelle 28 entspricht. Ebenfalls der freie Innenquerschnitt der Federnabe 64 und der Durchlässe 122 in den Scheiben 32 ist an den Querschnitt der An­triebswelle 28 angepasst um diese miteinander drehfest zu verbinden. Mittels den beiden Muttern 114 sind alle auf der Antriebswelle 28 sitzenden Teile in axialer Richtung gehalten.The drive shaft 28 has an essentially square cross section (FIG. 2) and has a thread 112 at each of its two ends (FIG. 3) onto which a nut 114 is screwed. The chassis 46 has two spaced apart and parallel bearing plates 46 ', through which the drive shaft 28 is guided and on which the drive shaft 28 is rotatably supported by means of ball bearings 116. Depending on the outside of the relevant bearing plates 46 'sit on the shaft, the two disks 32 of the cam plate assemblies 30 for the two outer vacuum interrupters 12. Between the two bearing plates 46' are the two double levers 88.90 on the drive shaft 28 and between these the two disks 32 of the cam disk arrangement 30 for the middle vacuum interrupter 12 and the spring hub 64 with the spiral spring 68, the spring cage 72 and the gear 74 are arranged. The disks 32 of each cam disk arrangement 30 are spaced apart from one another by spacer sleeves 118 (FIG. 3), and further spacer sleeves 118 'are provided between the two outer cam disk arrangements 30 and the relevant ball bearing 116 or the relevant nut 114. The double levers 88, 90 are welded to tubes 120, which have a free inner cross section which corresponds to the cross section of the drive shaft 28. The free inner cross section of the spring hub 64 and the passages 122 in the disks 32 is also adapted to the cross section of the drive shaft 28 in order to connect them to one another in a rotationally fixed manner. All parts seated on the drive shaft 28 are held in the axial direction by means of the two nuts 114.

Im Federkraftantrieb 10 ist weiter ein nur schematisch dargestellter Hilfsschalter 124 vorgesehen, dessen be­wegbarer Kontakt über den betreffenden Wulst 48 einer Scheibe 32 betätigbar ist. Der Hilfsschalter 124 ist somit in Abhängigkeit von der jeweiligen Drehlage der Antriebs­welle 28 geschlossen oder geöffnet. Der Hilfsschalter 124 wird für Rückmeldungszwecke oder für elektrische Verriege­lungen des Federkraftantriebes 10 benötigt.An auxiliary switch 124, which is only shown schematically, is also provided in the spring-loaded drive 10, the movable contact of which can be actuated via the bead 48 of a disk 32 in question. The auxiliary switch 124 is thus closed or opened depending on the respective rotational position of the drive shaft 28. The auxiliary switch 124 is required for feedback purposes or for electrical locking of the spring-loaded drive 10.

Die Montage des Federkraftantriebes 10 ist sehr einfach. Unter Verschieben der Antriebswelle 28 in axialer Richtung werden jeweils die nächsten Antriebselemente auf die An­triebswelle 28 aufgesteckt und am Schluss werden diese mittels den Muttern 114 gegeneinander verspannt.The assembly of the spring force drive 10 is very simple. When the drive shaft 28 is displaced in the axial direction, the next drive elements are plugged onto the drive shaft 28 and at the end these are braced against one another by means of the nuts 114.

Der Federkraftantrieb 10 arbeitet wie folgt. In der in den Figuren dargestellten Einschaltstellung wird die Spiral­ feder 68 mittels des Elektromotores 84 über das Unter­setzungsgetriebe 86 das Zahnrad 74 und den Federkäfig 72 im Uhrzeigersinn um 360° aufgezogen. Die Antriebswelle 28 wird vom Abstützorgan 92 am Mitdrehen gehindert. Um den Leistungsschalter auszuschalten wird die Abstützwelle 100 im Uhrzeigersinn von Hand durch Betätigen der Ausschalt­taste 106 oder elektrisch durch aktivieren des Ausschalt­relais 108 im Uhrzeigersinn verschwenkt. Die Abstützwelle 100 gibt den Abstützhebel 98 frei, welcher in Folge der Anpresskraft der Abstützwalze 88′ sich durch die Anfräsung 104 hindurch im Uhrzeigersinn verschwenkt. Dadurch wird die Antriebswelle 28 freigegeben, welche sich unter der Kraft der Spiralfeder 68 im Uhrzeigersinn um 150° dreht bis die Abstützwalze 90′ des Doppelhebels 90 am Abstütz­hebel 110 zur Anlage kommt. Wie dies insbesondere aus der Figur 2 ersichtlich ist, wird bei dieser Drehbewegung der Antriebswelle 28 das Folgeglied 36 durch die Nut 34 nach oben in die obere Endlage gezogen. Diese Bewegung wird über die Lasche 38, den Schwenkhebel 24 und den Schalt­stössel 18 an den bewegbaren Schaltkontakt 20 übertragen, welcher in die Ausschaltstellung verschoben wird. Bevor allerdings der Schwenkhebel 24 in Ausschaltrichtung von der Lasche 38 mitgenommen wird, entspannt sich die Kon­taktdruckfeder 58 bis der Bolzen 42 am unteren Ende des Durchlasses 40 ansteht. Im Bereich zwischen dem Beginn des Drehens der Antriebswelle 28 und der Mitnahme des Schwenk­hebels 24 wird die von der Spiralfeder 68 und der Kontakt­druckfeder 58 freigegebene Energie in kinetische Energie umgesetzt, welche gegebenenfalls dazu dient aneinander angeschweisste Schaltkontakte 16,20 voneinander zu lösen. Unter der Kraft der Spiralfeder 68 werden die bewegbaren Schaltkontakte 20 in die Ausschaltstellung überführt.The spring force drive 10 operates as follows. In the switch-on position shown in the figures, the spiral spring 68 by means of the electric motor 84 via the reduction gear 86, the gear 74 and the spring cage 72 clockwise by 360 °. The drive shaft 28 is prevented from rotating by the support member 92. In order to switch off the circuit breaker, the support shaft 100 is pivoted clockwise by hand by actuating the switch-off button 106 or electrically by activating the switch-off relay 108 in a clockwise direction. The support shaft 100 releases the support lever 98 which, as a result of the pressing force of the support roller 88 ', swivels clockwise through the milling 104. As a result, the drive shaft 28 is released, which rotates clockwise by 150 ° under the force of the spiral spring 68 until the support roller 90 'of the double lever 90 comes to rest on the support lever 110. As can be seen in particular from FIG. 2, with this rotary movement of the drive shaft 28, the follower 36 is pulled upwards through the groove 34 into the upper end position. This movement is transmitted via the tab 38, the pivot lever 24 and the switching plunger 18 to the movable switching contact 20, which is moved into the off position. However, before the pivot lever 24 is taken along by the tab 38 in the switch-off direction, the contact pressure spring 58 relaxes until the bolt 42 is in contact with the lower end of the passage 40. In the area between the start of the rotation of the drive shaft 28 and the entrainment of the pivot lever 24, the energy released by the spiral spring 68 and the contact pressure spring 58 is converted into kinetic energy, which is used, if appropriate, to detach switch contacts 16, 20 welded to one another. Under the force of the spiral spring 68, the movable switching contacts 20 are transferred to the off position.

Um nun den Leistungsschalter einzuschalten wird die Ab­stützwelle 100′ entwender von Hand durch Betätigen der Einschalttaste 106′ oder elektrisch durch Aktivieren des Einschaltrelais 108′ im Uhrzeigersinn verschwenkt. Dadurch wird in entsprechender Art und Weise der Abstützhebel 110 und somit der Doppelhebel 90 freigegeben. In Folge der noch in der Spiralfeder 68 gespeicherten Energie dreht sich die Antriebswelle 28 um 210° bis wiederum die Ab­stützwalze 80′ des Doppelhebels 88 am Abstützhebel 98 des Abstützorganes 92 anschlägt. Während dieser Einschaltdre­hung um 210° wird das Folgeglied 36 von der oberen Endlage in die in den Figuren gezeigte untere Endlage und der Schalter in die Einschaltstellung überführt. Sobald die beiden Schaltkontakte 16,20 aneinander anstehen, wird die Kontaktdurckfeder 58 gespannt. In Folge der kleinen Stei­gung der Nuten 34 im Bereich des kürzesten Abstandes 50 wird ein Teil der von der Spiralfeder 68 abzugebenden Energie zuerst in kinetische Energie umgesetzt um den er­wünschten Hub-Zeitverlauf des bewegbaren Schaltkontaktes 20 zu erreichen. In der Einschaltstellung der Antriebs­welle 28 wird nun die Spiralfeder 68 wiederrum um 360° aufgezogen.In order to switch on the circuit breaker, the support shaft 100 'is swiveled clockwise by the user by pressing the switch 106' or electrically by activating the switch-on relay 108 '. As a result, the support lever 110 and thus the double lever 90 are released in a corresponding manner. As a result of the energy still stored in the spiral spring 68, the drive shaft 28 rotates through 210 ° until the support roller 80 'of the double lever 88 strikes the support lever 98 of the support member 92. During this switch-on rotation of 210 °, the follower 36 is transferred from the upper end position into the lower end position shown in the figures and the switch into the switch-on position. As soon as the two switching contacts 16, 20 abut each other, the contact pressure spring 58 is tensioned. As a result of the small slope of the grooves 34 in the region of the shortest distance 50, part of the energy to be released by the spiral spring 68 is first converted into kinetic energy in order to achieve the desired stroke-time profile of the movable switching contact 20. In the switched-on position of the drive shaft 28, the spiral spring 68 is in turn pulled up by 360 °.

Um eine Schnellwiedereinschaltung und anschliessende er­neute Ausschaltung zu gewährleisten ist die Spiralfeder 68 soweit vorgespannt, dass bei voll aufgezogener Spiralfeder 68 die gespeicherte Energie für ein Ausschalten ein er­neutes Einschalten und Wiederauschalten genügt, wobei je­des mal sobald die Einschaltstellung erreicht ist, der Fe­derkäfig 72 wieder um 360° angetrieben wird.In order to ensure a quick reclosure and subsequent reclosure, the coil spring 68 is preloaded to such an extent that when the coil spring 68 is fully opened, the stored energy is sufficient for a reclosure to switch on and reclosure, with the spring cage 72 again rotating 360 as soon as the on position is reached ° is driven.

Das Folgeglied 36 ist in den Nuten 34 zwangsläufig ge­führt, wodurch bezüglich der Bewegungsrichtung der Lasche 38 zwischen dem Folgeglied 36 und den Scheiben 32 eine formschlüssige Verbindung gebildet wird. Die Stellung des bewegbaren Schaltkontaktes 20 entspricht somit immer zwangsläufig der Stellung der Antriebswelle 28, korrigiert jeweils um den durch die Kontaktdruckfeder 58 bzw. den Durchlass 40 aufgenommenen Differenzhub.The follower 36 is inevitably guided in the grooves 34, whereby a positive connection is formed with respect to the direction of movement of the tab 38 between the follower 36 and the washers 32. The position of the movable switching contact 20 thus always corresponds to the position of the drive shaft 28, corrected in each case by the differential stroke absorbed by the contact pressure spring 58 or the passage 40.

Es ist auch denkbar pro Pol eine einzige Scheibe vorzuse­hen, welche dann vorzugsweise beiseitig eine je gegenglei­che Nut aufweist. In diesem Fall ist die Lasche gabelför­mige ausgebildet und weist an jeder Zinke ein Folgeglied auf, welches in der betreffenden Nut geführt ist. Es ist auch denkbar, dass die jeweilige Scheibe nur eine einzige Nut aufweist und das Folgeglied durch andere Mittel am Herausrutschen aus der Nut gehindert wird.It is also conceivable to provide a single disk per pole, which then preferably has a mutually opposite groove on each side. In this case, the tab is fork-shaped and has a follow link on each tine, which is guided in the relevant groove. It is also conceivable that the respective disk has only a single groove and the following link is prevented from slipping out of the groove by other means.

Die Lagerschilder 46′ können an einem Isoliertragrahmen angeformt sein, welche die Vakuumschaltröhren 12 minde­stens Teilweise umgreift und an welchem die Vakuumschalt­röhren 12 befestigt sein können. Es ist selbstverständlich auch denkbar, dass nur eine einzige Kurvenscheibenanord­nung vorgesehen ist und der Hub des Folgegliedes 36 über gemeinsame Betätigungsorgane an alle Vakuumschaltröhren 12 übertragen wird.The end shields 46 'can be formed on an insulating support frame, which at least partially encompasses the vacuum interrupters 12 and to which the vacuum interrupters 12 can be attached. Of course, it is also conceivable that only a single cam disk arrangement is provided and the stroke of the follower 36 is transmitted to all vacuum interrupters 12 via common actuating members.

Selbstverständlich ist es auch denkbar, dass das Folge­glied an einem Schwenkhebel angeordnet ist. Es ist auch möglich die Lasche direkt ohne Schwenkhebel an den Kon­taktstössel anzukoppeln wenn der Federkraftantrieb 10 und die Vakuumschaltröhren eine dementsprechende gegenseitige Lage aufweisen. Anstelle von Vakuumschaltröhren können auch andere Unterbrecher vorgesehen sein. Durch Austau­schen von einzelnen Antriebselementen ist der Federkraft­antrieb an die Erfordernisse der verschiedensten Unterbre­cher anpassbar.Of course, it is also conceivable that the follower is arranged on a pivot lever. It is also possible to couple the tab directly to the contact plunger without a pivoting lever if the spring-loaded drive 10 and the vacuum interrupters are mutually corresponding Have location. Instead of vacuum interrupters, other interrupters can also be provided. By replacing individual drive elements, the spring-loaded drive can be adapted to the requirements of a wide variety of interrupters.

Claims (15)

1. Federkraftantrieb für einen Leistungsschalter, insbe­sondere einen Vakuumschalter für Mittelspannung, mit einer mittels einer Federanordnung (68) zum Ein- und Ausschalten des Leistungsschalters (12) in derselben Drehrichtung angetriebenen und in der Ausschalt- und Einschaltstellung mittels Abstützeinrichtungen (92,94) am Drehen freigebbar gehinderten Antriebswelle (28), auf welcher mindestens eine Scheibe (32) einer Kur­venscheibenanordnung (30) mit einer auf ein mit min­destens einem bewegbaren Schaltkontakt (20) wirkver­bundenen Hubglied (36,38) druckwirksam einwirkenden Steuerkurve (34) drehfest sitzt, um das Hubglied (36,38) zwischen zwei Endstellungen hin und her zu bewegen, dadurch gekennzeichnet, dass die Scheibe (32) mindestens eine die Steuerkurve bildende, um die An­triebswelle (28) herumlaufende, in Richtung der An­triebswelle (28) offene Nut (34) aufweist, welche auf das Hubglied (36,38) auch zugwirksam einwirkt.1. Spring-loaded drive for a circuit breaker, in particular a vacuum switch for medium voltage, with a spring arrangement (68) for switching the circuit breaker (12) on and off in the same direction of rotation and in the switch-off and switch-on position by means of support devices (92, 94) on Rotation of the hindered drive shaft (28), on which at least one disk (32) of a cam disk arrangement (30) with a control cam (34), which is operatively connected to at least one movable switch contact (20), is seated in a rotationally fixed manner to move the lifting member (36, 38) back and forth between two end positions, characterized in that the disc (32) forms at least one groove (34) which forms the control cam and runs around the drive shaft (28) in the direction of the drive shaft (28) ), which also acts on the lifting member (36, 38) in a pulling manner. 2. Federkraftantrieb nach Anspruch 1, dadurch gekenn­zeichnet, dass am Hubglied (36,38) ein in der Nut (34) geführtes Folgeglied (36) vorgesehen ist.2. Spring force drive according to claim 1, characterized in that a follower (36) guided in the groove (34) is provided on the lifting member (36, 38). 3. Federkraftantrieb nach Anspruch 1 oder 2, dadurch ge­kennzeichnet, dass das Hubglied (36,38) in der Nut (34) zwangsgeführt ist.3. Spring force drive according to claim 1 or 2, characterized in that the lifting member (36,38) in the groove (34) is positively guided. 4. Federkraftantrieb nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass bei einem mehrpoligen Leistungsschalter pro Pol eine Kurvenscheibenanordnung (30) und ein mit dem bewegbaren Schaltkontakt (20) des betreffenden Poles wirkverbundenes Hubglied (36,38) vorgesehen sind.4. Spring force drive according to one of claims 1 to 3, characterized in that, in the case of a multi-pole circuit breaker, one cam disk arrangement (30) and one lifting member (36, 38) operatively connected to the movable switching contact (20) of the respective pole are provided. 5. Federkraftantrieb nach einem der Ansprüche 2 bis 4, dadurch gekennzeichnet, dass die bzw. jede Kurven­scheibenanordnung (30) zwei voneinander beabstandete Scheiben (32) aufweist, deren Nuten (34) gegeneinander offen sind, und das Folgeglied (36,38) in beiden Nuten (34) geführt ist.5. Spring force drive according to one of claims 2 to 4, characterized in that the or each cam disk arrangement (30) has two spaced disks (32), the grooves (34) of which are open to one another, and the follower (36, 38) in two grooves (34) is guided. 6. Federkraftantrieb nach einem der Ansprüche 2 bis 4, dadurch gekennzeichnet, dass die Scheibe beidseitig je eine die Steuerkurve bildende, um die Antriebswelle herumlaufende, in Richtung der Antriebswelle offene Nut aufweist, das Hubglied gabelförmig ausgebildet ist und jede Zinke des Hubgliedes mit einem in der betref­fenden Nut geführten Folgeglied ausgerüstet ist.6. Spring-loaded drive according to one of claims 2 to 4, characterized in that the disk has on both sides a groove forming the control curve, running around the drive shaft, in the direction of the drive shaft open groove, the lifting member is fork-shaped and each prong of the lifting member with a of the relevant groove guided follower is equipped. 7. Federkraftantrieb nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass die Nuten in die Scheiben eingefräst sind.7. Spring force drive according to one of claims 1 to 6, characterized in that the grooves are milled into the disks. 8. Federkraftantrieb nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass die Scheiben (32) aus einem Blech ausgestanzt und die Nuten (34) vorzugs­weise im gleichen Arbeitsgang darin eingeprägt sind.8. Spring force drive according to one of claims 1 to 5, characterized in that the disks (32) are punched out of sheet metal and the grooves (34) are preferably stamped therein in the same operation. 9. Federkraftantrieb nach Anspruch 8, dadurch gekenn­zeichnet, dass auf der den Nuten (34) gegenüberliegen­den Seite von Scheiben (32) Schaltmittel (124) vorgesehen sind die durch die durch das Prägen der Nuten (34) gebildeten Wül­ste (48) betätigbar sind.9. Spring force drive according to claim 8, characterized in that on the opposite side of the grooves (34) disks (32) are provided with switching means (124) which can be actuated by the beads (48) formed by the embossing of the grooves (34). 10. Federkraftantrieb nach einem der Ansprüche 1 bis 9, dadurch gekennzeichnet, dass das Hubglied (36, 38) über eine in der entlasteten Stellung zugwirksame,vorzugsweise vorgespannte Kontaktdruckfederanordnung (26) auf den be­treffenden Schaltkontakt (20), gegebenenfalls über einen Schwenkhebel (24) einwirkt.10. Spring force drive according to one of claims 1 to 9, characterized in that the lifting member (36, 38) over a tensile in the relieved position, preferably biased contact pressure spring arrangement (26) on the relevant switching contact (20), optionally via a pivot lever (24 ) acts. 11. Federkraftantrieb nach einem der Ansprüche 1 bis 10, dadurch gekennzeichnet, dass das Hubglied (36, 38) mit im wesentlichen rechtwinklig zur Antriebswelle (28) verlau­fender Längserstreckung als Koppel an zwei Schwingen (24, 52) gelagert ist, wobei vorzugsweise die eine Schwinge durch den Schwenkhebel (24) gebildet ist.11. Spring force drive according to one of claims 1 to 10, characterized in that the lifting member (36, 38) with a substantially perpendicular to the drive shaft (28) extending longitudinal extension as a coupling on two rockers (24, 52) is mounted, preferably one Swing arm is formed by the pivot lever (24). 12. Federkraftantrieb nach einem der Ansprüche 1 bis 11, dadurch gekennzeichnet, dass die Antriebswelle (28) einen vieleckigen oder sternförmigen Querschnitt aufweist und alle drehfest mit der Antriebswelle (28) verbunden Elemen­te (30, 32, 64, 88, 90) formschlüssig, gegebenenfalls un­ter Zwischenschaltung von Distanzstücken (118, 118′, 120), darauf aufgesteckt und mittels Halteelementen (114) in axialer Richtung gehalten sind.12. Spring force drive according to one of claims 1 to 11, characterized in that the drive shaft (28) has a polygonal or star-shaped cross section and all elements (30, 32, 64, 88, 90) connected to the drive shaft (28) in a rotationally fixed manner, if necessary with the interposition of spacers (118, 118 ', 120), placed thereon and held in the axial direction by means of holding elements (114). 13. Federkraftantrieb nach Anspruch 12, dadurch gekenn­zeichnet, dass auf der Antriebswelle (28) zwei gegeneinan­der versetzte Abstützhebel (88, 90) drehfest sitzen die je mit einem ortsfesten Abstützorgan (92, 94) zum lösbaren Festhalten der Antriebswelle (28) in der Ausschalt- bzw Einschaltstellung zusammenwirken.13. Spring force drive according to claim 12, characterized in that on the drive shaft (28) two mutually offset support levers (88, 90) sit non-rotatably each with a fixed support member (92, 94) for releasably holding the drive shaft (28) in the switch-off - respectively Interact switch position. 14. Federkraftantrieb nach Anspruch 12 oder 13, dadurch gekennzeichnet, dass die Federanordnung eine Spiralfeder (68) aufweist deren inneres Ende (66) mit einer auf die Antriebswelle (28) drehfest aufgesetzten Federnabe (64) und deren äusseres Ende (70) mit einem, vorzugsweise auf der Federnabe (64), frei drehbar gelagerten Federkäfig (72) verbunden ist, der mit einer Rücklaufsperre und mit einem Aufzugorgan (84) wirkverbunden ist.14. Spring force drive according to claim 12 or 13, characterized in that the spring arrangement has a spiral spring (68) whose inner end (66) with a non-rotatably mounted on the drive shaft (28) spring hub (64) and the outer end (70) with one , preferably on the spring hub (64), freely rotatably mounted spring cage (72) which is operatively connected to a backstop and to an elevator member (84). 15. Federkraftantrieb nach einem der Ansprüche 1 bis 14, dadurch gekennzeichnet, dass die Antriebswelle und vor­zugsweise weitere Antriebsteile an mindestens einem Schild gelagert sind der an einem Isoliertragrahmen des Lei­stungsschalters angeformt ist der die Unterbrecherelemente bzw Vakuumschaltröhren mindestens teilweise umgreift.15. Spring-loaded drive according to one of claims 1 to 14, characterized in that the drive shaft and preferably further drive parts are mounted on at least one shield which is formed on an insulating support frame of the circuit breaker which at least partially encompasses the interrupter elements or vacuum interrupters.
EP90103414A 1989-03-03 1990-02-22 Spring motor driving mechanism for a circuit breaker Expired - Lifetime EP0385265B1 (en)

Applications Claiming Priority (2)

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CH800/89 1989-03-03
CH80089 1989-03-03

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US (1) US4996397A (en)
EP (1) EP0385265B1 (en)
JP (1) JP3025970B2 (en)
AT (1) ATE112885T1 (en)
DE (1) DE59007411D1 (en)
DK (1) DK0385265T3 (en)
ES (1) ES2060832T3 (en)

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CH682431A5 (en) * 1991-09-10 1993-09-15 Sprecher Energie Ag Spring drive for MV or HV load switch - has intermediate drive automatically disengaged when spring is fully wound to prevent overwinding
EP1056108A1 (en) * 1999-05-28 2000-11-29 Alstom Actuating for a multipolar circuit breaker having a variable distance between poles
WO2007016880A1 (en) * 2005-08-10 2007-02-15 Siemens Aktiengesellschaft Circuit breaker
FR2896617A1 (en) * 2006-01-24 2007-07-27 Schneider Electric Ind Sas Electromechanical contactor`s actuator for industrial environment, has plate supporting force resulting from deflection and repulsion forces of one of movable contacts, which is applied to movable contact when lever is in closed position
DE202006012002U1 (en) * 2006-08-03 2007-12-20 Walter Kraus Gmbh Drive for a switch in electrical systems
CN102664355A (en) * 2012-05-21 2012-09-12 湖州泰仑电力设备有限公司 Medium-voltage dual-power combined electrical appliance
WO2015162534A1 (en) * 2014-04-24 2015-10-29 Eaton Corporation Circuit breakers with clock spring drives and/or multi-lobe drive cams and related actuators and methods
DE112010004255B4 (en) * 2009-11-03 2017-11-02 Mitsubishi Electric Corporation Switch actuation mechanism
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CH687051A5 (en) * 1992-02-28 1996-08-30 Gec Alsthom T & D Ag A method of tensioning an accumulator spring of a drive of a high or medium voltage circuit breaker and circuit breaker for implementing the method.
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FR2794278B1 (en) * 1999-05-28 2001-08-10 Alstom QUICK CONTROL DEVICE FOR A HIGH VOLTAGE CONNECTION APPARATUS, IN PARTICULAR AN EARTH ISOLATOR
JP4601487B2 (en) * 2005-05-02 2010-12-22 三菱電機株式会社 Gas insulated switchgear
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Cited By (11)

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Publication number Priority date Publication date Assignee Title
CH682431A5 (en) * 1991-09-10 1993-09-15 Sprecher Energie Ag Spring drive for MV or HV load switch - has intermediate drive automatically disengaged when spring is fully wound to prevent overwinding
EP1056108A1 (en) * 1999-05-28 2000-11-29 Alstom Actuating for a multipolar circuit breaker having a variable distance between poles
FR2794279A1 (en) * 1999-05-28 2000-12-01 Alstom CONTROL OF A MULTIPOLES CIRCUIT BREAKER HAVING A DISTANCE BETWEEN VARIABLE POLES
WO2007016880A1 (en) * 2005-08-10 2007-02-15 Siemens Aktiengesellschaft Circuit breaker
FR2896617A1 (en) * 2006-01-24 2007-07-27 Schneider Electric Ind Sas Electromechanical contactor`s actuator for industrial environment, has plate supporting force resulting from deflection and repulsion forces of one of movable contacts, which is applied to movable contact when lever is in closed position
DE202006012002U1 (en) * 2006-08-03 2007-12-20 Walter Kraus Gmbh Drive for a switch in electrical systems
DE112010004255B4 (en) * 2009-11-03 2017-11-02 Mitsubishi Electric Corporation Switch actuation mechanism
CN102664355A (en) * 2012-05-21 2012-09-12 湖州泰仑电力设备有限公司 Medium-voltage dual-power combined electrical appliance
CN102664355B (en) * 2012-05-21 2015-01-21 国家电网公司 Medium-voltage dual-power combined electrical appliance
WO2015162534A1 (en) * 2014-04-24 2015-10-29 Eaton Corporation Circuit breakers with clock spring drives and/or multi-lobe drive cams and related actuators and methods
CN111313264A (en) * 2019-12-09 2020-06-19 杰创电气有限公司 Solid insulation bus-bar connection cabinet

Also Published As

Publication number Publication date
EP0385265B1 (en) 1994-10-12
ATE112885T1 (en) 1994-10-15
DE59007411D1 (en) 1994-11-17
ES2060832T3 (en) 1994-12-01
JP3025970B2 (en) 2000-03-27
JPH02278626A (en) 1990-11-14
DK0385265T3 (en) 1994-11-14
US4996397A (en) 1991-02-26

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