EP0206883B1 - Lastschalter mit gegossenem Gehäuse - Google Patents

Lastschalter mit gegossenem Gehäuse Download PDF

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Publication number
EP0206883B1
EP0206883B1 EP86401191A EP86401191A EP0206883B1 EP 0206883 B1 EP0206883 B1 EP 0206883B1 EP 86401191 A EP86401191 A EP 86401191A EP 86401191 A EP86401191 A EP 86401191A EP 0206883 B1 EP0206883 B1 EP 0206883B1
Authority
EP
European Patent Office
Prior art keywords
hook
handle
circuit breaker
spindle
toggle
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
EP86401191A
Other languages
English (en)
French (fr)
Other versions
EP0206883A1 (de
Inventor
Jean-Philippe Neel
Roger Case
Gilbert Garnier
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
Priority to AT86401191T priority Critical patent/ATE56307T1/de
Publication of EP0206883A1 publication Critical patent/EP0206883A1/de
Application granted granted Critical
Publication of EP0206883B1 publication Critical patent/EP0206883B1/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
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/10—Operating or release mechanisms
    • H01H71/50—Manual reset mechanisms which may be also used for manual release
    • H01H71/501—Means for breaking welded contacts; Indicating contact welding or other malfunction of the circuit breaker
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/10—Operating or release mechanisms
    • H01H71/50—Manual reset mechanisms which may be also used for manual release
    • H01H71/52—Manual reset mechanisms which may be also used for manual release actuated by lever
    • H01H71/522—Manual reset mechanisms which may be also used for manual release actuated by lever comprising a cradle-mechanism
    • H01H71/525—Manual reset mechanisms which may be also used for manual release actuated by lever comprising a cradle-mechanism comprising a toggle between cradle and contact arm and mechanism spring acting between handle and toggle knee

Definitions

  • a first object of the present invention is to allow the realization of a mechanism at increased speed for contact separation control without significant increase in the volume occupied by this mechanism.
  • Another object of the invention is to allow the realization of a circuit breaker mechanism ensuring a strong acceleration of the movable contact from the separation of the contacts.
  • the object of the invention is also to produce a circuit breaker with a high intensity molded case, the height of the case is relatively small and the contact pressure withstands these high currents.
  • the circuit breaker according to the invention is characterized in that said hook carries a stop cooperating with the upper link, during the pivoting of the released hook towards the tripped position DD of the circuit breaker, to move said upper link by breaking the toggle joint and bringing the axis of the knee lever in a position beyond the neutral point of said pivoting handle, said neutral point being defined by the alignment of the axis of articulation of the handle, the axis of the knee lever and the anchoring point of the spring on the handle.
  • the pivoting of the hook following the release of the coupling acts in two different ways on the toggle joint, in this case on the upper link of the toggle joint, on the one hand by displacement of the articulation axis of the upper link on the hook in a direction of opening of the contacts and on the other hand by pivoting of this upper link, causing the breaking of the toggle joint to accelerate the opening movement of the movable contact.
  • This double action occurs from the start of the tripping movement, which promotes rapid separation of the contacts and effective limitation of the cut current.
  • the upper link remains stationary relative to the hook, which limits friction and the braking of the movement of the moving assembly.
  • connection between the hook and the rod "-tte supernatant is advantageously made p ⁇ .. a light formed in the hook and a pin carried by the upper link and engaging in the lumen of the hook.
  • the upper link extends in the closed position substantially perpendicular to the hook, so as to reduce the length of this upper link and therefore the overall height of the mechanism while maintaining an amplified movement. of the kneepad when triggered.
  • the large angle of pivoting of the handle in the closed position allows the creation of a particularly simple locking device for the handle in the event of soldering of the contacts.
  • the handle support is extended by a finger capable of abutting on the articulation axis of the movable contact in the event of welding of the latter before the handle has crossed the opening dead center defined by the articulation point of the handle and the axis position of the knee lifter.
  • a low voltage circuit breaker comprises a casing made of insulating material molded in two parts, in this case a bottom 10 and a cover 12.
  • the casing of the circuit breaker, of the three-pole type is subdivided by internal partitions into three compartments each receiving the constituent elements of a pole. Only the central pole, with which is associated an operating mechanism designated by the general reference 14, is represented in FIG. 1, the other poles being identical.
  • the bottom 10 carries input 16 and output 19 terminals arranged on the two opposite small sides of the molded housing. Terminal 16 is connected by a conductor 17 plated on the bottom 10 to a fixed contact 18, which cooperates in the closed position of the circuit breaker with movable contacts 20.
  • movable contacts 20 in the form of blades are mounted with limited pivoting on an axis 22 secured to a contact support 24, the end of which is subject to a rotary bar 26, connecting the supports 24 of the different poles.
  • the movable contacts 20 are electrically connected by braids 28 and conductors 30 to the output terminal 19.
  • Springs 32 interposed between the support 24 and the movable contacts 20 provide the contact pressure. It is easy to see that a rotation of the bar 26 causes the support 24 to pivot in the clockwise direction of rotation in FIG. 1, causing separation of the contacts 18, 20.
  • the operating mechanism 14 comprises a handle 38 projecting from an opening 40, formed in the cover 12.
  • the handle 38 is rigidly secured to a handle support 42, pivotally mounted on a fixed axis 44 carried by a frame constituted by two flanges 46, fixed to the housing by screws 48.
  • the flanges 46 surround the constituent elements of the mechanism 14.
  • On a second axis fixed 50 carried by the flanges 46 is articulated a hook 52, the opposite end 54 of which cooperates with a latch 56.
  • On an axis 58 of the hook 52 is articulated a toggle formed by a link s upper 60, a toggle pin 62 and a lower link 64.
  • the lower link is articulated by an axis 66 carried by the support 24 of movable contact.
  • a tension spring 68 is anchored between the axis of the toggle joint 62 and a point 70 of the handle support 42.
  • the closing of the contacts is controlled by a reverse pivoting of the handle 38, bringing the toggle joint in the extended position corresponding to the closing of the contacts 18, 20.
  • Tripping of the circuit breaker that is to say an automatic opening on fault is generated by the unlocking of the hook 56, which releases the end 54 of the hook 52.
  • the latter pivots about its axis 50 allowing movement of the point of the axis 58 of articulation of the upper link 60.
  • the circuit breaker in FIG. 1 is equipped with an electronic trip device comprising a sensor in the form of a current transformer 72 which delivers a tripping signal, in the event of overcurrent or short circuit, to a relay 74 acting on the latching 56.
  • Such electronic trip devices are well known and they can moreover be replaced by conventional thermal and / or magnetic trip devices.
  • the upper link 60 carries a pin or lug 76, engaged in a slot 78, formed in the hook 52.
  • the pin 76 rests on the bottom 80 of the light 78, oriented on the side of the axis 50 of pivoting of the hook 52.
  • the upper link 60 is substantially perpendicular to the right connecting the axis 50 of the hook to the 'axis 58 of the link.
  • the released hook 52 pivots about its axis 50 anticlockwise by moving up the axis 58 for fixing the upper link 60 and pushing from the bottom 80 of the light 78 the pin 76 to the right in FIG. 3.
  • This action of the hook 52 on the pin 76 forces the knee lever 60, 64, to bend, from the start of the movement of the hook 52 by accelerating the opening movement imposed to the support 24 of the mobile contact 20.
  • FIG. 5 which illustrates the kinematics of this tripping movement, it can be seen that the axis 62 of the toggle joint moves during this movement beyond neutral for closing the handle 38, represented by a straight line 82 in broken lines connecting the axis 44 of articulation of the handle 38 at point F of the closed position of this handle.
  • the handle 38 Upon crossing by the axis 62 of the right 82, the handle 38 is biased to the right to come into the position identified in Figure 5 by the points DD.
  • FIG. 5 are also marked the other positions of the handle 38, in this case the closing dead center PMF, the opening dead center PMO, the sectioning point S, the opening point O and the point of reset A. These points are well known to specialists and will emerge from the following description. It should be noted that in the triggered position, the pin 76 is still in support of the bottom 80 of the light 78, the upper link 60 having not moved relative hook 52, these two parts 60, 52, having moved as a single unit.
  • the straight line connecting the axes 50, 58 is substantially parallel to the movable contact support 24 20 and the articulation point 66 of the lower link 64 on the support 24 is substantially at the movable contact 20.
  • These provisions allow a shortening of the links 60, 64, allowing a reduction in the overall height of the mechanism 14.
  • the angle defined by the upper link 60 and the spring 68 is large, for example around 25 degrees, which provides a significant force, maintaining the toggle 60, 64, in the extended position and a high contact pressure. This large angle does not hinder the movement of the handle 38 towards the tripping position DD, thanks to the pivoting imposed by the light 78 in the manner described above.
  • FIG. 4 illustrates the manual opening operation of the circuit breaker by pivoting the handle 38 from the closed position F to the open position O.
  • the line of action of the spring 68 is moved towards the right in Figure 4, so as to exert on the knee brace 60, 64, a breaking force.
  • the hook 52 remains stationary, the pin 76 sliding in the slot 78.
  • Such an operation is conventional, the reclosing of the circuit breaker being effected by a pivoting of the handle 38 in the opposite direction.
  • the handle support 42 has an extension 84 beyond its pivot axis 44 capable of abutting the axis 22 of articulation of the movable contact 20 in the event of the contacts 18, 20 being welded. This coming into abutment prevents a pivoting of the handle 38 beyond the position S, representative of a soldering of the contacts 18, 20.
  • the handle 38 When the handle 38 is released, it returns to its closed position F signaling the closed position of the circuit breaker.
  • the axis 22 accompanies the support 24 in its opening movement avoiding a stop of the extension 84 and preventing movement of the handle 38 towards the open position.
  • Such devices for indicating contact soldering are well known per se, the kinematics of the mechanism according to the invention allowing production by extremely simple and reliable means.
  • the hook 52 carries in the vicinity of its end 54 a transverse rearming axis 86.
  • the handle support 42 has abutment surfaces 88 capable of pushing the transverse axis 86 towards the position for hooking the end 54 of the hook 52 with the hook 56 during the pivoting of the handle. 38 towards the open O and reset R positions on the right of FIG. 3.
  • the transverse axis 86 constitutes at the same time a stop defining the tripping position DD of the handle 38.

Landscapes

  • Breakers (AREA)
  • Switch Cases, Indication, And Locking (AREA)
  • Gas-Insulated Switchgears (AREA)
  • Emergency Protection Circuit Devices (AREA)
  • Push-Button Switches (AREA)
  • Brushes (AREA)
  • Control Of Eletrric Generators (AREA)
  • Insulating Of Coils (AREA)
  • Fuses (AREA)
  • Motor Or Generator Frames (AREA)

Claims (9)

1. Elektrischer Niederspannungs-Lastschalter mit Gussgehäuse, der drei feste Stellungen aufweist, bzw. eine Offnungsstellung O, eine Schliessstellung F und eine ausgelöste Stellung DD, und mit:
- wenigstens einem in dem genannten Gehäuse fest montierten Kontakt (18),
- einem Träger (24) eines beweglichen Kontakts (20), der drehbar in dem genannten Gehäuse montiert ist, um die genannten Kontakte (18, 20) in die Schliess- bzw. Offnungsstellung zu bringen,
- einem in dem genannten Gehäuse untergebrachten Steuermechanismus (14), um den genannten Träger (24) zwischen der Öffnungs- und Schliessstellung zu betätigen, wobei der genannte Mechanismus einen drehbaren Griff (38) aufweist zur handbetätigten Steuerung der Öffnung und Schliessung des Schalters, sowie einen am genannten Gehäuse befestigten Rahmen (46),
- ein drehbar auf einer festen Achse (50) des genannten Rahmens (46) gelagerter Haken (52), der mit der Sperrvorrichtung (56) zusammenarbeitet und dessen Befreiung die Auslösung des Schalters bewirkt,
- ein Kniegelenk, das von einem oberen Hebel (60) und einem unteren Hebel (64) gebildet wird, welche miteinander durch eine Kniegelenksachse (62) verbunden sind, wobei das freie Ende des oberen Hebels (60) auf einer Achse (58) des Hakens (52) gelenkig angebracht ist, und das Ende des unteren Hebels (64) auf dem genannten Träger (24) gelenkig gelagert ist,
- eine Zugfeder (68), die einerseits mit der Kniegelenksachse (62) verankert ist und andererseits an einem Punkt (70) des Griffs (38), um das Kniegelenk (60, 64) in die Ausdehnungsstellung zu bringen, wenn der Griff (38) in der Schliessstellung des Schalters ist, bzw. in die gebrochene Lage zu bringen, wenn der Griff in der geöffneten Stellung ist, wobei die Befreiung des Hakens (52) durch ein Entriegeln der Sperrvorrichtung (56) die Verschiebung des Ganzen, Haken (52), Kniegelenk (60, 64), bewirkt und den Griff (58) in die ausgelöste Stellung DD des Schalters bringt,

dadurch gekennzeichnet, dass der genannte Haken (52) einen Anschlag (80) aufweist, und dass bei Befreiung des Hakens (52) und seiner Schwenkung in die ausgelöste Stellung (DD) des Schalters der genannte Anschlag (80) mit dem oberen Hebel (60) zusammenarbeitet und ihn verschiebt, um das Kniegelenk (60, 64) zu brechen und die Kniegelenksachse (62) in eine Überschreitungsstellung des Öffnungs-Totpunktes (PMO) des drehbaren Griffs (38) zu bringen, wobei der genannte Öffnungs-Totpunkt durch die Ausrichtung der Gelenkachse (44) des Griffs (38), die Kniegelenksachse (62) und den Verankerungspunkt (70) der Feder auf dem Griff (38) bestimmt ist.
2. Lastschalter gemäss Anspruch 1, dadurch gekennzeichnet, dass der genannte Anschlag von dem Ende (80) einer in dem Haken (52) angeordneten Öffnung (78) gebildet wird, wobei das genannte Öffnungsende (80) mit einem Zapfen (76) in Anschlag kommt, der mit dem oberen Hebel (60) verbunden ist und in die genannte Öffnung (78) während eines Auslösevorgangs eingeführt wird.
3. Lastschalter gemäss Anspruch 1 oder 2, dadurch gekennzeichnet, dass der genannte Anschlag (80) eine starre Verbindung zwischen dem Haken (52) und dem oberen Hebel (60) herstellt, welche sich wie ein Einblockteil während eines Auslösevorganges und bei Befreiung des Hakens (52) bewegen.
4. Lastschalter gemäss Anspruch 1, 2 oder 3, dadurch gekennzeichnet, dass der genannte Anschlag (80) so ausgeführt ist, um die freie Drehung des oberen Hebels (60) während der Öffnungs- und Schliessvorgänge nicht durch direktes von Hand ausgeübtes Einwirken auf den Griff (38) zu beeinträchtigen.
5. Lastschalter gemäss Anspruch 1, 2, 3 oder 4, dadurch gekennzeichnet, dass in der Schliessstellung der Winkel, der als Spitze die Gelenkachse (58) des oberen Hebels (60) auf dem Haken (52) hat, und der durch die Drehachse (50) des Hakens und durch die Achse (62) des Kniegelenks (60, 64) bestimmt wird, einem rechten Winkel sehr nahekommt.
6. Lastschalter gemäss irgendeinem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass in der Schliessstellung die Gerade, die durch die Gelenkachse (58) des oberen Hebels (60) und durch die Drehachse (50) des Hakens (52) geht, fast parallel zu dem genannten Träger (24) des beweglichen Kontaktes ist.
7. Lastschalter gemäss irgendeinem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der genannte Haken (52) an seinem Ende (54) nahe der Sperrvorrichtung (56) eine Querachse (86) trägt, und dass der Griff Anschläge (88) trägt, die mit der genannten Querachse (86) zusammenarbeiten können, um den Haken (52) während einer Wiederspannung des Griffs (38) in die Verriegelungsstellung zu bringen.
8. Lastschalter gemäss irgendeinem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Gelenkachse (66) des unteren Hebels (64) auf dem Träger (24) des beweglichen Kontaktes merklich mit der Geraden ausgerichtet ist, die durch den beweglichen Kontakt (20) und die Drehwelle (26) des Trägers (24) führt.
9. Lastschalter gemäss irgendeinem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Griff (38) auf einen Griffträger (42) montiert ist, der eine Verlängerung (84) über die Gelenkachse (44) des Griffs hinaus aufweist, um mit dem genannten beweglichen Kontakt (20) im Falle einer Schweissung zusammenzuarbeiten und um das Schwenken des Griffs (38) in die Öffnungslage O zu vermeiden.
EP86401191A 1985-06-12 1986-06-03 Lastschalter mit gegossenem Gehäuse Expired - Lifetime EP0206883B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86401191T ATE56307T1 (de) 1985-06-12 1986-06-03 Lastschalter mit gegossenem gehaeuse.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8509003A FR2583570B1 (fr) 1985-06-12 1985-06-12 Disjoncteur a boitier moule.
FR8509003 1985-06-12

Publications (2)

Publication Number Publication Date
EP0206883A1 EP0206883A1 (de) 1986-12-30
EP0206883B1 true EP0206883B1 (de) 1990-09-05

Family

ID=9320222

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86401191A Expired - Lifetime EP0206883B1 (de) 1985-06-12 1986-06-03 Lastschalter mit gegossenem Gehäuse

Country Status (11)

Country Link
US (1) US4710738A (de)
EP (1) EP0206883B1 (de)
JP (1) JPH0828171B2 (de)
AT (1) ATE56307T1 (de)
AU (1) AU584842B2 (de)
CA (1) CA1268199A (de)
DE (1) DE3673888D1 (de)
ES (1) ES8704290A1 (de)
FR (1) FR2583570B1 (de)
PT (1) PT82757B (de)
ZA (1) ZA864286B (de)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2583571B1 (fr) * 1985-06-12 1994-02-18 Merlin Et Gerin Disjoncteur basse tension a coupure amelioree.
FR2659177B1 (fr) * 1990-03-01 1992-09-04 Merlin Gerin Capteur de courant pour un declencheur electronique d'un disjoncteur electrique.
FR2663152B1 (fr) * 1990-06-11 1996-04-26 Merlin Gerin Mecanisme d'un disjoncteur a ressorts a boudin groupes tendus et procede de montage des ressorts.
FR2687248B1 (fr) * 1992-02-07 1994-04-01 Merlin Gerin Dispositif de raccordement d'un disjoncteur basse tension a boitier moule.
FR2687249B1 (fr) * 1992-02-07 1994-04-01 Merlin Gerin Mecanisme de commande d'un disjoncteur a boitier moule.
FR2689310B1 (fr) * 1992-03-31 1997-05-09 Merlin Gerin Mecanisme a poignee pivotante d'un disjoncteur a boitier moule.
JP3057155B2 (ja) * 1998-08-07 2000-06-26 寺崎電気産業株式会社 回路遮断器
US6087913A (en) * 1998-11-20 2000-07-11 General Electric Company Circuit breaker mechanism for a rotary contact system
US6346868B1 (en) * 2000-03-01 2002-02-12 General Electric Company Circuit interrupter operating mechanism
JP4717912B2 (ja) * 2008-09-16 2011-07-06 株式会社日立産機システム 回路遮断器
EP4163104A1 (de) 2021-10-05 2023-04-12 Flexopack S.A. Monoaxial orientierte, vernetzte mehrschichtfolie und verfahren
AU2022271461A1 (en) 2021-11-30 2023-06-15 Flexopack S.A. Vacuum skin packaging film

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2025422A1 (de) * 1968-12-05 1970-09-11 Westinghouse Electric Corp

Family Cites Families (7)

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Publication number Priority date Publication date Assignee Title
US2759063A (en) * 1950-07-25 1956-08-14 Murray Mfg Corp Circuit breaker
US3016435A (en) * 1959-03-18 1962-01-09 Heinemann Electric Co Circuit breaker and latch structure
US3171921A (en) * 1960-10-03 1965-03-02 Square D Co Circuit breaker operating mechanism
GB1393799A (en) * 1971-12-01 1975-05-14 Tokyo Shibaura Electric Co Circuit breaker
AT331899B (de) * 1974-02-15 1976-08-25 Schrack Elektrizitaets Ag E Elektrischer schalter
US4594491A (en) * 1984-09-28 1986-06-10 Westinghouse Electric Corp. Molded case circuit breaker with a trip mechanism having an intermediate latch lever
US4660009A (en) * 1985-07-29 1987-04-21 Westinghouse Electric Corp. Modular integral circuit interrupter

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2025422A1 (de) * 1968-12-05 1970-09-11 Westinghouse Electric Corp

Also Published As

Publication number Publication date
EP0206883A1 (de) 1986-12-30
ATE56307T1 (de) 1990-09-15
ZA864286B (en) 1987-01-28
AU5852986A (en) 1986-12-18
CA1268199A (en) 1990-04-24
PT82757A (fr) 1986-07-01
DE3673888D1 (de) 1990-10-11
PT82757B (pt) 1990-06-29
JPH0828171B2 (ja) 1996-03-21
ES555843A0 (es) 1987-04-01
FR2583570A1 (fr) 1986-12-19
AU584842B2 (en) 1989-06-01
ES8704290A1 (es) 1987-04-01
FR2583570B1 (fr) 1988-07-15
US4710738A (en) 1987-12-01
JPS6271141A (ja) 1987-04-01

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