EP0222645B1 - Betätigungsmechanismus für einen Schalter mit einer Energiespeichervorrichtung - Google Patents

Betätigungsmechanismus für einen Schalter mit einer Energiespeichervorrichtung Download PDF

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Publication number
EP0222645B1
EP0222645B1 EP86402268A EP86402268A EP0222645B1 EP 0222645 B1 EP0222645 B1 EP 0222645B1 EP 86402268 A EP86402268 A EP 86402268A EP 86402268 A EP86402268 A EP 86402268A EP 0222645 B1 EP0222645 B1 EP 0222645B1
Authority
EP
European Patent Office
Prior art keywords
telescopic link
closing
operating mechanism
circuit breaker
spring
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
EP86402268A
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English (en)
French (fr)
Other versions
EP0222645A1 (de
Inventor
Pierre Baginski
Jean-Pierre Nebon
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Merlin Gerin SA
Original Assignee
Merlin Gerin SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Merlin Gerin SA filed Critical Merlin Gerin SA
Publication of EP0222645A1 publication Critical patent/EP0222645A1/de
Application granted granted Critical
Publication of EP0222645B1 publication Critical patent/EP0222645B1/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
    • 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
    • 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
    • H01H2003/3068—Housing support frame for energy accumulator and cooperating mechanism
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2300/00—Orthogonal indexing scheme relating to electric switches, relays, selectors or emergency protective devices covered by H01H
    • H01H2300/06—Orthogonal indexing scheme relating to electric switches, relays, selectors or emergency protective devices covered by H01H using tools as locking means
    • H01H2300/062—Orthogonal indexing scheme relating to electric switches, relays, selectors or emergency protective devices covered by H01H using tools as locking means for locking a charged spring
    • H01H2300/064—Orthogonal indexing scheme relating to electric switches, relays, selectors or emergency protective devices covered by H01H using tools as locking means for locking a charged spring by means of removable member
    • 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
    • H01H3/3005—Charging means
    • H01H3/3015—Charging means using cam devices

Definitions

  • the invention relates to a control mechanism according to the preamble of claim 1.
  • Document US-A-3,084,238 discloses a mechanism for a circuit breaker, having a telescopic connection for compression and expansion of a closing spring armed by a latching device.
  • the spring is blocked in the compressed state by a locking system, and allows a slow closing of the contacts.
  • the closing spring remains permanently in place in the mechanism and is not designed to be interchangeable.
  • the mechanism comprises an arming cam, the release of which is caused by the unlocking of a closing pawl.
  • the expansion of the closing spring ensures the abrupt closing of the contacts, and the resetting of the spring takes place, either manually by means of a charging lever, or automatically by an electric motor as soon as the circuit breaker closes in order to be ready for a new operation in the event of opening on fault.
  • Such mechanism for high intensity circuit breakers require significant operating forces which are dependent on the required characteristics and performances, in particular electrodynamic resistance, closing power, etc.
  • Several types of mechanisms having accumulator systems with closing springs of predetermined forces are therefore essential to meet the manufacturing requirements of a range of circuit breakers comprising basic devices and devices of different performance. This results in an increase in the storage volume of the mechanisms, and in management and manufacturing cost problems.
  • the present invention consists in producing for the whole range a standard mechanism having an accumulator system with adaptable springs for the choice of the operating force according to the type. of devices.
  • control mechanism is characterized in that the control means cause the kinematic chain to break with the toggle device authorizing the withdrawal of the subassembly formed by the telescopic connection and the closing spring in the state compressed.
  • the springs are adapted either by adding an additional spring, or by simply replacing the spring or springs of the accumulator system. This is done easily without dismantling the standard mechanism.
  • the telescopic link comprises a guide positioned in a housing of the chassis, and cooperating slidingly with a yoke mechanically coupled to the kinematic chain when the locking member is removed from the telescopic link.
  • the locking member of the telescopic link can be inserted into aligned holes in the yoke and the guide, so as to prevent the spring from relaxing during withdrawal of the telescopic link.
  • a multipolar electric circuit breaker having at least one pair of contacts 10, 12, separable by pole, is actuated by a control mechanism 14 carried by a chassis with parallel flanges 15 and comprising a toggle joint device 16 associated to a trigger hook 18.
  • the toggle joint device 16 (FIG. 1) comprises a pair of rods 20, 22, articulated on a pivot axis 24, the lower link rod 20 for transmission being mechanically coupled to a transverse switching rod 23, common to all of the poles .
  • the bar 23 is constituted by a shaft 26 rotatably mounted between an open position and a closed position of the contacts 10, 12.
  • a connecting rod 30 ( Figures 4 and 5) which connects a crank of the bar 23 to an insulating cage 28 for supporting the movable contact 12.
  • the latter is connected to a connection pad 32 by a flexible conductor 34, in particular a braid.
  • a contact pressure spring 36 is arranged between the cage 28 and the upper face of each movable contact 12.
  • the trigger hook 18 is pivotally mounted on a main axis 38 fixed between an armed position ( Figure 1) and a triggered position.
  • An opening spring 40 is anchored between a lug 42 of the bar 23 and a fixed retaining cleat 44 disposed above the toggle device 16.
  • An opening pawl 46 formed by a locking lever pivotally mounted on a axis 48, is controlled by a first latch 50 in the shape of a half-moon.
  • a spring 52 for returning the opening pawl 46 is located opposite the first latch 50 relative to the axis 48.
  • a stop 54 formed on the opening pawl 46 between the axis 48 and the latch 50, cooperates in the armed position with a V-shaped recess 56 in the trigger hook 18.
  • the upper link 22 of the toggle joint 16 is articulated on an axis 58 of the trigger hook 18 opposite the recess 56.
  • the mechanism 14 comprises a reset cam 62 keyed to the main axis 38 of the hook 18, and cooperating with an energy storage system 64, shown in detail in FIGS. 2 and 3.
  • the energy storage system 64 is equipped with a closing pawl 66 controlled by a second latch 68, and a driving lever 70 pivotally mounted on an axis 69.
  • An elastic energy storage device 71 comprising at least one closing spring 72 is arranged between a housing 74 of the chassis and a finger 76 for transmitting the driving lever 70.
  • the reset cam 62 cooperates with a roller 78 of the lever driver 70, and the closing spring 72 urges the latter to bear on the cam 62.
  • the profile of the cam 62 comprises a first sector 80 for arming the closing spring 72, and a second sector 82 corresponding to the release of the roller 78 authorizing a sudden pivoting of the driving lever 70 anticlockwise under the action of the closing spring 72 (passage from FIG. 3 to FIG. 2).
  • the reset cam 62 is also provided with a lug 84 capable of coming into abutment with the closing pawl 66 when the end of the first sector 80 of the cam 62 is in contact with the roller 78 of the driving lever 70 .
  • the closing spring 72 of the accumulator system 64 is armed, and the contacts 10, 12, are either in the open position or in the closed position depending on the state of the device to be toggle switch 16 of FIG. 1.
  • the roller 78 bearing on the first sector 80 exerts a torque on the reset cam 62 urging the latter in clockwise rotation.
  • the closing pawl 66 opposes this rotation by virtue of the retention of the lug 84 of the cam 62.
  • the mechanism 14 cooperates with a magnetothermal or electronic trip device (not shown) to cause the automatic opening of the contacts 10, 12, in the event of an overload or a fault.
  • a closing operation can be controlled by actuation of the second latch 68 causing the closing pawl 66 to pivot about its axis 88 in the opposite direction. clockwise ( Figure 2).
  • the rearming of the accumulator system 64 by compression of the closing spring 72 is carried out manually or automatically by means of an operating lever or a geared motor (not shown) fixed on the main axis 38.
  • This spring rearming operation closure 72 by rotation of the cam 62 is explained in detail in French patent application No. 2,558,986 of the applicant.
  • the main axis 38 is rotated in a clockwise direction until the lug 84 of the cam 62 comes into abutment on the closing pawl 66.
  • the reset cam 62 rotates with the main axis 38 in the same direction of rotation, and occupies two stable positions, namely an armed position (FIG. 3) in which the cam 62 is locked by the closing pawl 66, and a disarmed position (FIG. 2) authorizing the release of the driving lever 70 and the relaxation of the closing spring 72.
  • the elastic device 71 for accumulating energy may comprise, depending on the desired stiffness, a single closing spring 72 (FIGS. 2 to 5) or several coaxial springs 72 (FIGS. 6 and 7) of the helical compression type.
  • the springs 72 are arranged on a telescopic link 90 comprising a guide 92 positioned in a housing 74 of the chassis, and a yoke 94 capable of sliding along the guide 92 by cooperating with the finger 76 for transmitting the driving lever.
  • the finger 76 is housed in a notch 104 in the yoke 94.
  • the yoke 94 and the guide 92 are advantageously provided with orifices 96, 98, for the passage of a locking member 100 authorizing the disassembly of the telescopic link 90 relative to the rest of the mechanism.
  • the establishment of the locking member 100 positively locks the telescopic link 90 and maintains the closing springs 72 in the compressed position by preventing their relaxation.
  • the locking member 100 may be formed by a pin, a pin or a screw capable of passing radially through the orifices 96, 98, aligned with the connection 90 when the yoke 94 and the guide 92 are brought closer to the armed position. .
  • the adaptation of the closing springs 72 of the energy storage system 64 is illustrated in FIGS. 6 and 7, and is carried out as follows:
  • the energy storage system 64 is actuated beforehand towards the armed position (FIG. 6) by rotation of the main axis 38 and of the reset cam 62.
  • the closing pawl 66 maintains the cam 62 in this armed position, and the two springs 72 are in the compressed state.
  • the alignment of the orifices 96, 98, of the yoke 94 and of the guide 92 allows the insertion of the blocking member 100 so as to subsequently prevent the spacing of the telescopic link 90.
  • the depressing of the closing button of the mechanism 14 then causes the actuation of the second latch 68 which unlocks the closing pawl 66 to release the reset cam 62.
  • the pivoting of the driving lever 70 around the axis 69 in the opposite direction clockwise causes a break in the mechanical connection between the yoke 94 and the transmission finger 76 of the lever 70 ( Figure 7).
  • the assembly of telescopic link 90 and closing springs 72 of the elastic accumulation device 71 can then be extracted from the mechanism 14.
  • a slight axial clearance 102 remains between the yoke 94 and the guide 92 in the inserted position of the locking member 100 .
  • the presence of the clearance 102 is essential for subsequently authorizing the removal of the locking member 100. This operation is carried out outside by means of a vice or of a special tool which ensures the maximum compression of the springs. 72 until the clearance 102 is taken up. After removal of the locking member 100, the unlocking of the telescopic link 90 allows the progressive relaxation of the springs 72.
  • the disassembly of the two springs 72 allows their exchange by other compression springs having a different hardness or the addition of a third closing spring 72 (shown in dotted lines in FIG. 6).
  • the reassembly operation of the elastic device 71 takes place in the reverse order after maximum compression of the new closing springs 72 and introduction of the locking member 100.
  • the device 71 is replaced in the mechanism 14 by simply positioning the guide 92 in the orifice 74 of the chassis, followed by the arming of the energy storage system 64 (passage from FIG. 7 to FIG. 6) so as to restore the mechanical connection between the yoke 94 and the driving lever 70.
  • the locking member 100 of the telescopic link 90 is finally removed, and the mechanism 14 is ready to order closing of the circuit breaker.
  • the adaptation or replacement of the closing springs 72 of the energy storage system 64 is carried out without dismantling the rest of the mechanism 14. It is possible to customize the control mechanism 14 at the last moment thanks to the choice of the stiffness of the springs which determines the electrodynamic behavior and the intensity of the closing force. Managing the production of a range of circuit breakers fitted with mechanism 14 can thus be facilitated, since the basic devices include a standard mechanism with one or two springs, and it suffices to add an additional spring without dismantling the rest of the mechanism to transform the basic device into a more efficient device (improvement of the electrodynamic resistance and the closing power). The ease of exchanging the closing springs 72 also improves the upkeep and maintenance of the mechanism 14.

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  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
  • Breakers (AREA)

Claims (8)

  1. Antriebsmechanismus für einen Mehrpol-Leistungsschalter hoher Nennströme mit zwei trennbaren Kontakten (10, 12) pro Pol und:
    - einem einem Auslösehaken (18) und einer Ausschaltfeder (40) zugeordneten Kniehebelmechanismus (16) zur Überführung des beweglichen Kontakts (12) in die Ausschaltstellung, wobei das Spannen der Ausschaltfeder (40) während des Einschaltspiels automatisch erfolgt,
    - einem Energiespeichersystem (64) mit einer elastischen Vorrichtung (71), die mindestens eine Einschaltfeder (72) zur Überführung des beweglichen Kontakts (12) in die Einschaltstellung sowie eine Teleskopverbindung (90) mit zwei sich relativ zueinander bewegenden Teilen aufweist, zwischen die die genannte Einschaltfeder (72) eingesetzt wird,
    - einem Handbetätigungshebel und/oder einem Elektromotor, die mit den Antriebsmitteln (62, 66) zum Spannen der Einschaltfeder (72) zusammenwirken,
    - und einer zwischen dem Energiespeichersystem (64) und dem Kniehebelmechanismus (16) angeordneten kinematischen Übertragungskette, wobei das Energiespeichersystem (64) ein bewegliches Blokkierelement (100) zur Verriegelung der genannten Teleskopverbindung (90) am Ende des Spannhubs nach dem Ineinanderschieben der beiden Spannelemente für die Federn (72) aufweist, dadurch gekennzeichnet, daß die genannten Antriebsmittel die Unterbrechung der kinematischen Kette mit dem Kniehebelmechanismus (16) bewirken, um den Ausbau der aus der Teleskopverbindung (90) und der zusammengedrückten Einschaltfeder (72) bestehenden Teileinheit zu ermöglichen.
  2. Antriebsmechanismus eines Leistungsschalters nach Anspruch 1, dadurch gekennzeichnet, daß die Teleskopverbindung (90) ein Führungselement (92) aufweist, das in einer Aufnahme (74) des Chassis gelagert ist und gleitend mit einer Kappe (94) zusammenwirkt, die bei herausgezogenem Blockierelement (100) der Teleskopverbindung (90) mechanisch mit der kinematischen Kette gekoppelt ist.
  3. Antriebsmechanismus eines Leistungsschalters nach Anspruch 1, dadurch gekennzeichnet, daß die beiden Elemente der Teleskopverbindung Öffnungen (96, 98) aufweisen, die am Ende des Spannhubs fluchtend angeordnet werden können, um die Einführung des Blokkierelements (100) zu ermöglichen.
  4. Antriebsmechanismus eines Leistungsschalters nach Anspruch 1 mit einer als Schrauben-Druckfeder ausgeführten Einschaltfeder, dadurch gekennzeichnet, daß das Blockierelement (100) der Teleskopverbindung (90) in Form eines quer zur Axialrichtung der Einschaltfeder (72) angeordneten Keils oder Stifts ausgebildet ist.
  5. Antriebsmechanismus eines Leistungsschalters nach Anspruch 3, dadurch gekennzeichnet, daß nach Einführung des genannten Blokkierelements (100) in die Öffnungen (96, 98) ein geringer Axialabstand (102) zwischen den beiden Elementen der Teleskopverbindung (90) verbleibt.
  6. Antriebsmechanismus eines Leistungsschalters nach Anspruch 2, dadurch gekennzeichnet, daß die kinematische Übertragungskette zwischen dem Energiespeichersystem (64) und dem Kniehebelmechanismus (16) einen Mitnehmerhebel (70) mit einem in bezug auf die Schwenkachse (69) des Hebels (70) exzentrisch angeordneten Übertragungszapfen (76) aufweist, und daß der genannte Zapfen (76) mit einer Aussparung (104) der Kappe (94) zusammenwirkt, um eine mechanische Verbindung zur Unterbrechung der genannten kinematischen Kette nach Einführung des genannten Blockierelements (100) zu bilden.
  7. Antriebsmechanismus nach Anspruch 1, dadurch gekennzeichnet, daß mehrere Einschalt-Schraubenfedern (72) mit unterschiedlichen Durchmessern koaxial auf der genannten Teleskopverbindung (90) montiert sind.
  8. Antriebsmechanismus nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, daß die Antriebsmittel eine mit Hilfe des Handbetätigungshebels und/oder des Motors durch Zusammenwirkung mit einer Rolle (78) des Mitnehmerhebels (70) verschwenkte Wiederspannungs-Steuerkurve (62) aufweisen und daß eine durch eine Rastvorrichtung (68) angesteuerte Einschaltklinke (66) eine erste Stellung mit Verriegelung der Steuerkurve in der Gespannt-Stellung und eine zweite Stellung mit Entriegelung der Steuerkurve (62) zur Entspannung der Einschaltfeder aufweist.
EP86402268A 1985-10-31 1986-10-13 Betätigungsmechanismus für einen Schalter mit einer Energiespeichervorrichtung Expired - Lifetime EP0222645B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8516347A FR2589626B1 (fr) 1985-10-31 1985-10-31 Mecanisme de commande d'un disjoncteur equipe d'un systeme accumulateur d'energie
FR8516347 1985-10-31

Publications (2)

Publication Number Publication Date
EP0222645A1 EP0222645A1 (de) 1987-05-20
EP0222645B1 true EP0222645B1 (de) 1994-03-02

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ID=9324492

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86402268A Expired - Lifetime EP0222645B1 (de) 1985-10-31 1986-10-13 Betätigungsmechanismus für einen Schalter mit einer Energiespeichervorrichtung

Country Status (10)

Country Link
US (1) US4713508A (de)
EP (1) EP0222645B1 (de)
JP (1) JPH071656B2 (de)
CN (1) CN1005878B (de)
CA (1) CA1289179C (de)
DE (1) DE3689683T2 (de)
FR (1) FR2589626B1 (de)
HK (1) HK41795A (de)
IN (1) IN167258B (de)
ZA (1) ZA868062B (de)

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CN103594294B (zh) * 2013-11-28 2015-09-23 人民电器集团有限公司 断路器操作机构机械特性的检测方法以及断路器操作机构
CN104465153B (zh) * 2014-12-23 2017-10-27 贵州泰永长征技术股份有限公司 一种双断点万能式断路器的新型操作机构
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JPH071656B2 (ja) 1995-01-11
DE3689683D1 (de) 1994-04-07
IN167258B (de) 1990-09-29
JPS62105321A (ja) 1987-05-15
FR2589626A1 (fr) 1987-05-07
US4713508A (en) 1987-12-15
DE3689683T2 (de) 1994-08-04
ZA868062B (en) 1987-06-24
EP0222645A1 (de) 1987-05-20
CN1005878B (zh) 1989-11-22
CN86107510A (zh) 1987-04-29
CA1289179C (en) 1991-09-17
FR2589626B1 (fr) 1989-03-03
HK41795A (en) 1995-03-31

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