EP0021882A1 - Elektrischer Stromunterbrechungsapparat des strombegrenzenden Typs - Google Patents

Elektrischer Stromunterbrechungsapparat des strombegrenzenden Typs Download PDF

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Publication number
EP0021882A1
EP0021882A1 EP80400734A EP80400734A EP0021882A1 EP 0021882 A1 EP0021882 A1 EP 0021882A1 EP 80400734 A EP80400734 A EP 80400734A EP 80400734 A EP80400734 A EP 80400734A EP 0021882 A1 EP0021882 A1 EP 0021882A1
Authority
EP
European Patent Office
Prior art keywords
bridge
movable
contact bridge
movable contact
slide
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.)
Withdrawn
Application number
EP80400734A
Other languages
English (en)
French (fr)
Inventor
Pierre Lemarquand
Claude Battefort
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.)
Hazemeyer Sa SA
Original Assignee
Hazemeyer Sa 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 Hazemeyer Sa SA filed Critical Hazemeyer Sa SA
Publication of EP0021882A1 publication Critical patent/EP0021882A1/de
Withdrawn legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H77/00—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting
    • H01H77/02—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting in which the excess current itself provides the energy for opening the contacts, and having a separate reset mechanism
    • H01H77/10—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting in which the excess current itself provides the energy for opening the contacts, and having a separate reset mechanism with electrodynamic opening
    • H01H77/102—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting in which the excess current itself provides the energy for opening the contacts, and having a separate reset mechanism with electrodynamic opening characterised by special mounting of contact arm, allowing blow-off movement
    • H01H77/105—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting in which the excess current itself provides the energy for opening the contacts, and having a separate reset mechanism with electrodynamic opening characterised by special mounting of contact arm, allowing blow-off movement whereby the blow-off movement unlatches the contact from a contact holder

Definitions

  • the present invention relates to an electric current cutoff device of the current limiting type.
  • Cutting devices of this type comprising, on the one hand, at least one pair of fixed contacts which are capable of being connected by a movable contact bridge between an open position and a closed position and vice versa and which are shaped so as to exert on said bridge electrodynamic repulsion forces tending to push said bridge towards its open position when said fixed contacts and the movable bridge are traversed by a current whose intensity is greater than a determined threshold and, on the other hand, an energy accumulation mechanism capable of actuating said bridge between its open and closed positions and of being controlled by a protection release.
  • These known breaking devices also include a mechanical escapement device intended to produce a partially independent mechanical connection between said bridge - of movable contact and the actuation mechanism.
  • the trigger is designed to protect against thermal and magnetic overloads and its trigger threshold is of the order of 1.25 times the nominal current.
  • the trigger acts alone to open the circuit.
  • the circuit opens first abruptly under the action of electrodynamic repulsion forces, and then the opening action is completed by the trigger, the operation of which is slower than the action of said repulsion forces.
  • the present invention relates to a particularly advantageous structure of the mechanical escapement device, allowing a practically instantaneous opening of the circuit in the case of electrodynamic repulsion forces due to high overcurrents.
  • the mechanical escapement device comprises a slide movable under the action of the actuation mechanism, between two extreme positions corresponding respectively to the open and closed positions of the movable contact bridge, said slide being hollow and forming a sheath which encloses a hooking system with elastic transverse expansion capable of spontaneously hooking behind at least one hooking element secured to said sheath, the transverse retraction of said hooking system being controlled by a member secured to said movable contact bridge, when this is repelled by electrodynamic forces.
  • the slide in its extreme position corresponding to the closing of the electrical circuit and the contact pressure of the movable bridge on the fixed contacts is transmitted by the cooperation of the latching system, then in radial expansion. , with said attachment element secured to the sheath. If a significant overcurrent appears, the bridge is pushed back by electro-dynamic forces and the member secured to the contact bridge is pushed back by compressing the system transversely hanging. The latter therefore suddenly escapes the attachment element and the movable contact bridge abruptly moves away from the fixed contacts, producing an almost instantaneous opening of the circuit, because said member integral with the movable contact bridge slides in the sheath, which remains during this time in its extreme position corresponding to the closing of the circuit.
  • the fastening element integral with the sheath is disposed in an intermediate part of the latter and the slide moves in a well, so that, when the trigger moves the sheath from its extreme closed position to its position extreme opening after repulsion of the movable contact bridge, said sleeve slides relative to the attachment system which is retained in position by the cooperation of the movable contact bridge with the edge of the wells and which, at a moment, can expand transversely to recooperate with said latching element.
  • the escapement device is reset automatically and the cut-off device can be reset by simple voluntary action on the actuation mechanism.
  • magnetizable means are provided through which the current to be cut passes and capable of attracting, in the event of a significant overcurrent, a body free to move parallel to the slide, which then comes in contact with the movable contact bridge to act on it in the same direction as said repulsion forces.
  • the attachment system consists of two crossed rods, hinged together and in support on a spring which is housed in a hollow rod integral with the movable contact bridge and whose action tends to separate the ends of said rods opposite to said spring from one another.
  • the latter can expand transversely or, on the contrary, be closed by said hollow rod inside which they penetrate.
  • the different sliders are made integral with each other by a coupling.
  • Each pair of fixed contacts, the mobile contact bridge and the corresponding slide are arranged in a compartment independent of the device housing, this compartment being subdivided into a breaking chamber where the fixed contacts and the mobile contact bridge are located, a well in which the slide slides and an expansion chamber separated from the breaking chamber by one or more grids extending between the external walls of the well and the internal walls of the compartment.
  • the current limiting circuit breaker shown in FIGS. 1 to 7 comprises a housing 1 in which several compartments 2 are provided, separated from one another by walls, these compartments being arranged one behind the other in FIGS. 1 to 3, so that only one of them is visible in these figures.
  • each compartment 2 near its bottom, a pair of fixed contacts 3 and 4 is provided, arranged on current leads 5 and 6, forming symmetrical loops of one another with respect to a plane orthogonal to the plan of Figures 1 to 3, and capable of cooperating with a pair of movable contacts 7 and 8 carried at the ends of a rigid bridge 9.
  • the shapes of the current leads 5 and 6 and of the rigid bridge 9 are chosen so that, known way, repulsive forces Significant ions arise there, when very high currents pass between contacts 3 and 7, on the one hand, and 4 and 8, on the other.
  • Contacts 3 to 8 are arranged in the lower part 2a of each compartment 2, forming an interrupting chamber and arranged accordingly, in known manner.
  • each compartment 2 In the middle upper part of each compartment 2 is provided a well 10, in which a slide 11 can slide parallel to the opening and closing directions of the rigid contact bridge 9 to which it is connected in the manner described below.
  • the peripheral upper part 2b of each compartment 2 is separated from the inside of the well 10 by the walls of the latter and from the breaking chamber 2a by grids 12. This part 2b forms an expansion chamber.
  • the different current leads 5 are connected to corresponding connection terminals 13, arranged in compartments 14 of the housing 1.
  • the different current leads 6 are connected to a trigger 15 with current threshold intended to protect, in known manner, the electrical circuit against thermal and magnetic overloads.
  • This trip unit is housed in an isolated compartment of the housing 1 and it actuates a sliding rod 16 penetrating into another isolated compartment 17 of the housing 1, in which is housed the normal actuation mechanism 18 of the current limiting circuit breaker.
  • the actuating mechanism 18 is of the tumbler type with rods and spring and whose lock 19 is capable of being controlled by the trigger 15 by means of the sliding rod 16.
  • the actuating mechanism 18 is capable of being actuated by an operating lever 20, accessible from the outside.
  • the slides 11 are made integral with each other by transverse axes 35 and all of said slides 11 are coupled to the actuation mechanism 18 by a rocking lever 21.
  • magnetizable parts 22 and 23 fixed thereon, and opposite which are arranged magnetic plates 24 and 25, integral with a bar 26, free to move parallel to the opening and closing directions of the contact bridge 9.
  • the latter has a projection 27, passing between the current leads 5 and 6 and capable of cooperating with the bar 26.
  • the current limiting circuit breaker according to the invention is in the closed circuit position: in this case, the operating lever is in its extreme right position, while the sliders 11 are in their extreme low position and that the rod 16 remains distant from the lock 19.
  • the opening of the contacts can also be done under the action of the trigger 15.
  • the rod 16 acts on the lock 19 (see FIG. 2) so that the mechanism 18 switches partially in the direction of the arrow F 1 .
  • the current limiting circuit breaker can be actuated either manually or by the trigger 15. Thanks to the connection between the contact bridges 9 and the slides 11, described below, the automatic triggering by the trigger 15 is accelerated by case of a passade of too great intensity.
  • each slide 11 has a sleeve 28, inside which can slide a hollow rod 29 integral with the contact bridge 9, the sliding being done parallel to the opening and closing of that -this.
  • a spring 30 pressing, in the direction of their spacing, two crossed rods 31 and 32, which are articulated around an axis 33 and whose ends 36 and 37 opposite are rounded and bear on the free end of the spring 30 by means of a disc 38.
  • the free ends 39 and 40 of the links 31 and 32, opposite the spring 30, are capable of bearing on the flanges directed towards them, of a stirrup 34 placed at the bottom of the sheath 28.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Breakers (AREA)
  • Emergency Protection Circuit Devices (AREA)
EP80400734A 1979-06-07 1980-05-27 Elektrischer Stromunterbrechungsapparat des strombegrenzenden Typs Withdrawn EP0021882A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR7914559A FR2458887A1 (fr) 1979-06-07 1979-06-07 Appareil de coupure de courant electrique du type limiteur d'intensite
FR7914559 1979-06-07

Publications (1)

Publication Number Publication Date
EP0021882A1 true EP0021882A1 (de) 1981-01-07

Family

ID=9226316

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80400734A Withdrawn EP0021882A1 (de) 1979-06-07 1980-05-27 Elektrischer Stromunterbrechungsapparat des strombegrenzenden Typs

Country Status (3)

Country Link
EP (1) EP0021882A1 (de)
ES (1) ES8103467A1 (de)
FR (1) FR2458887A1 (de)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0030872A2 (de) * 1979-12-17 1981-06-24 Gould Inc. Strombegrenzender Adapter für Leistungsschalter
EP0199668A2 (de) * 1985-04-01 1986-10-29 Siemens Aktiengesellschaft Strombegrenzende Schalteinheit mit einer Kontaktbrückenanordnung
EP0398461A2 (de) * 1989-05-18 1990-11-22 Siemens Aktiengesellschaft Leistungsschalter mit einer Antriebsvorrichtung und einer Verklinkungseinrichtung für einen bewegbaren Schaltkontakt
EP0410258A2 (de) * 1989-07-26 1991-01-30 Siemens Aktiengesellschaft Elektromechanischer Schnellschalter
FR2785085A1 (fr) * 1998-10-22 2000-04-28 Gen Electric Dispositif articule pliant d'entrainement de bras de contact pour mecanisme de commande de disjoncteur, et disjoncteur comprenant un tel dispositif
GB2611551A (en) * 2021-10-07 2023-04-12 Eaton Intelligent Power Ltd Switching device and method for operating a switching device

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60189134A (ja) * 1984-03-09 1985-09-26 寺崎電気産業株式会社 回路遮断器

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR678144A (fr) * 1928-10-30 1930-03-19 Dispositif contacteur électrique à arcs soufflés
FR2124380A1 (de) * 1971-02-02 1972-09-22 Sace Spa Costruzioni Ele
FR2210817A1 (de) * 1972-12-15 1974-07-12 Bbc Brown Boveri & Cie
FR2237302A2 (de) * 1972-05-26 1975-02-07 Merlin Gerin
FR2397712A1 (fr) * 1977-07-13 1979-02-09 Telemecanique Electrique Discontacteur ou interrupteur limiteur d'intensite

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR678144A (fr) * 1928-10-30 1930-03-19 Dispositif contacteur électrique à arcs soufflés
FR2124380A1 (de) * 1971-02-02 1972-09-22 Sace Spa Costruzioni Ele
FR2237302A2 (de) * 1972-05-26 1975-02-07 Merlin Gerin
FR2210817A1 (de) * 1972-12-15 1974-07-12 Bbc Brown Boveri & Cie
FR2397712A1 (fr) * 1977-07-13 1979-02-09 Telemecanique Electrique Discontacteur ou interrupteur limiteur d'intensite

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0030872A2 (de) * 1979-12-17 1981-06-24 Gould Inc. Strombegrenzender Adapter für Leistungsschalter
EP0030872A3 (de) * 1979-12-17 1982-03-17 Gould Inc. Strombegrenzender Adapter für Leistungsschalter
EP0199668A2 (de) * 1985-04-01 1986-10-29 Siemens Aktiengesellschaft Strombegrenzende Schalteinheit mit einer Kontaktbrückenanordnung
EP0199668A3 (en) * 1985-04-01 1988-06-01 Siemens Aktiengesellschaft Berlin Und Munchen Current limiting switch unit with a contact bridge assembly
EP0398461A2 (de) * 1989-05-18 1990-11-22 Siemens Aktiengesellschaft Leistungsschalter mit einer Antriebsvorrichtung und einer Verklinkungseinrichtung für einen bewegbaren Schaltkontakt
EP0398461A3 (de) * 1989-05-18 1992-02-26 Siemens Aktiengesellschaft Leistungsschalter mit einer Antriebsvorrichtung und einer Verklinkungseinrichtung für einen bewegbaren Schaltkontakt
EP0410258A2 (de) * 1989-07-26 1991-01-30 Siemens Aktiengesellschaft Elektromechanischer Schnellschalter
EP0410258A3 (en) * 1989-07-26 1992-01-02 Siemens Aktiengesellschaft Electromechanic high-speed breaker
FR2785085A1 (fr) * 1998-10-22 2000-04-28 Gen Electric Dispositif articule pliant d'entrainement de bras de contact pour mecanisme de commande de disjoncteur, et disjoncteur comprenant un tel dispositif
DE19951042B4 (de) * 1998-10-22 2009-08-13 General Electric Co. Unterbrecher-Betätigungsmechanismus mit klappbarer Kontaktarm-Verbindungsanordnung
GB2611551A (en) * 2021-10-07 2023-04-12 Eaton Intelligent Power Ltd Switching device and method for operating a switching device

Also Published As

Publication number Publication date
FR2458887A1 (fr) 1981-01-02
ES492609A0 (es) 1981-02-16
ES8103467A1 (es) 1981-02-16

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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Effective date: 19810120

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Inventor name: BATTEFORT, CLAUDE

Inventor name: LEMARQUAND, PIERRE