EP0252198A1 - Elektromagnetischer Schalter - Google Patents

Elektromagnetischer Schalter Download PDF

Info

Publication number
EP0252198A1
EP0252198A1 EP86870071A EP86870071A EP0252198A1 EP 0252198 A1 EP0252198 A1 EP 0252198A1 EP 86870071 A EP86870071 A EP 86870071A EP 86870071 A EP86870071 A EP 86870071A EP 0252198 A1 EP0252198 A1 EP 0252198A1
Authority
EP
European Patent Office
Prior art keywords
lever
electromagnetic switch
switch according
electromagnet
rotation
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Withdrawn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
EP86870071A
Other languages
English (en)
French (fr)
Inventor
Joseph Fernand Hensenne
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.)
Alstom Belgium SA
Original Assignee
ACEC Transport SA
ACEC 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 ACEC Transport SA, ACEC SA filed Critical ACEC Transport SA
Priority to EP86870071A priority Critical patent/EP0252198A1/de
Publication of EP0252198A1 publication Critical patent/EP0252198A1/de
Withdrawn legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H50/00—Details of electromagnetic relays
    • H01H50/16—Magnetic circuit arrangements
    • H01H50/18—Movable parts of magnetic circuits, e.g. armature
    • H01H50/30—Mechanical arrangements for preventing or damping vibration or shock, e.g. by balancing of armature

Definitions

  • the present invention relates to an electromagnetic switch, more particularly to a switch intended to interrupt or close a direct current circuit at medium or high voltage.
  • the present invention aims to provide electromagnetic switches which have good resistance to mechanical shock, such as shock on the order of 3 g.
  • Another object of the present invention is to provide electromagnetic switches which can operate safely, under difficult conditions of use, while having a significantly reduced size compared to conventional switches.
  • Another object of the present invention is to provide an electromagnetic switch in which the stroke of the movable contact relative to the fixed contact is reduced to a minimum, the opening angle of the armature being very small (less than 10 °) so as to increase the breaking speeds, the service life of the switch, and the operating safety thereof.
  • Another object of the present invention is to provide a very simple electromagnetic switch and having high mechanical endurance, even under the aforementioned difficult operating conditions.
  • the electromagnetic switch is characterized in that the lever secured to the movable frame is tiltably arranged on an axis of rotation arranged in such a way that the two arms of the lever disposed on either side of said axis of rotation are in equilibrium with regard to the masses.
  • the axis of rotation of the lever secured to the movable armature is arranged on the fixed armature of the electromagnet.
  • the balancing of the lever has shown that the forces of attraction to be exerted by the electromagnet to separate or close the contacts are significantly reduced compared to the prior art. Indeed, the torque created by the attraction force exerted by the electromagnet on the movable armature must be greater than the torque generated by the return force, which must be calculated so as to be able to withstand shocks or accelerations. In the case of the device of the invention in which the mobile masses are in equilibrium, the restoring force is lower and, therefore, the attraction force can also be lower.
  • the electromagnet can be dimensioned more weakly and thus reduce the dimensions of the device. In addition, this results in reduced energy consumption for controlling the switch according to the invention.
  • the reduced device dimensions make it possible to reduce the distance between the axis of rotation of the lever and the axis of the electromagnet. It follows that for a distance of identical contacts, one can use a smaller opening angle; which places the device in better operating conditions.
  • Another advantage which results from the arrangement according to the invention lies in the fact that the contacts are clearly less subject to rebounding. As a result, the life of the contacts and of the contactor in general is significantly increased.
  • the return spring acting in the opposite direction of the force of the electromagnet is arranged near the point of rotation of the lever.
  • the point of rotation of the movable armature and the associated lever can be arranged as close as possible to the axis of the electromagnet, for example on the edge of the fixed armature disposed on the coil side of the electromagnet. Reducing the opening angle to less than 10 ° makes it possible to operate the switch under conditions in which the force acting on the armature is greatest. This makes it possible to make the best use of the electromagnet used and possibly to reduce its dimensioning compared to known devices, for a given force.
  • the switch according to the present invention comprises a frame 1 to which is fixed a fixed magnetic armature 3 equipped with an electromagnetic coil 5.
  • a movable armature 7 secured to a lever 9 can tilt on an axis d hinge 11 arranged on the end 13 of the fixed armature of the electromagnet.
  • the masses of the arms of the lever situated on either side of the axis of rotation 11 are balanced by means of the equation of the balance of the moments with respect to point 11.
  • the point of rotation 11 consists of a knife joint.
  • This construction is particularly advantageous, since the manufacture is very simple and inexpensive.
  • this joint offers the least risk of breakdowns and has a particularly good service life.
  • deviations from the source or during operation with respect to the ideal geometry generate parasitic forces whose effect attempts to return the lever to its optimal position.
  • the lever comprises, at one end, the movable contact 15 which will be described later. This is moved aside or applied against a fixed contact 17, according to the electromagnetic control applied to the lever 9.
  • Said lever 9 can also comprise, for example at the opposite end, auxiliary contacts 19, 20 known per se, fixed by means of a stirrup 21 to the chassis 1, the lever being always balanced from the point of view of the masses .
  • the lever 9 which is balanced according to the invention, possibly with the aid of additional weights (not shown) is also provided with a return spring 23 which bears against the frame 1 at 25 and against the lever 9 at 27 According to the present invention, said return spring 23 acts on the lever 9 near the point of rotation 11. It can easily be seen that, in this way, these forces ensure permanent contact at point 11.
  • the fixed contact 17 can be equipped with blowing horns 31, 32 known per se intended to deflect an electric arc which may have formed.
  • blowing horns 31, 32 are advantageously associated with a conventional breaking chamber 33 which is intended to lengthen the electric arc by laminating it to cool it.
  • the movable contact is also equipped with large horns 35, 36 intended to guide a possible electric arc in a certain direction in order to prevent the arc from destroying the silver studs.
  • FIG. 2 shows in more detail the movable contact 15 assembled on the end of the lever 9.
  • the movable contact 15 provided with horns 35 and 36 is mounted on the end of the lever 9 via a sleeve 41 integral with the lever, comprising a spring 43 which attracts the movable contact 15 towards the lever, while allowing it relative movements of the ball joint, thanks to a cylindrical boss 45 practiced in the movable contact 15 and adapted to a corresponding recess made in the sheath and by means of a semi-cylindrical nut 47 serving as a stop.
  • This particularly advantageous arrangement allows rapid replacement of the wear part constituted by the movable contact.
  • the cylindrical nut allows correct positioning of the movable contacts which are configured so that the two studs come into contact simultaneously so as to avoid premature wear of one of them.
  • Another wearing part which must be able to be replaced quickly is the bottom of the break box.
  • This advantageously comprises an insulating plate 18 pierced, in the center, with a passage hole (16) of the sleeve 41. Said plate is freely placed in its housing, but it cannot leave it under the effect of a shock any since the blowing horns 31, 32 prevent too much vertical movement and the blowing box prevents too much lateral movement. This free mounting of course allows the fixed contact to resume thermal shock.
  • the fixed contaxts 17 are riveted on the blowing horns. In this way, good cooling, good electrical connection, mechanical fixing of the movable contacts and easy replacement thereof are obtained at the same time as the blowing horns.
  • an electromagnetic switch according to the invention can be dimensioned 3 to 4 times weaker than a conventional switch for cutting a current. of the same intensity.
  • the switches according to the present invention gain interest and are economically more advantageous than pneumatic switches, in particular in the aforementioned applications.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Rotary Switch, Piano Key Switch, And Lever Switch (AREA)
EP86870071A 1986-05-26 1986-05-26 Elektromagnetischer Schalter Withdrawn EP0252198A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP86870071A EP0252198A1 (de) 1986-05-26 1986-05-26 Elektromagnetischer Schalter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP86870071A EP0252198A1 (de) 1986-05-26 1986-05-26 Elektromagnetischer Schalter

Publications (1)

Publication Number Publication Date
EP0252198A1 true EP0252198A1 (de) 1988-01-13

Family

ID=8196540

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86870071A Withdrawn EP0252198A1 (de) 1986-05-26 1986-05-26 Elektromagnetischer Schalter

Country Status (1)

Country Link
EP (1) EP0252198A1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2633447A1 (fr) * 1988-06-28 1989-12-29 Bosch Gmbh Robert Relais electromagnetique, stabilise contre des rebonds ou deplacements a vide
NL8801703A (nl) * 1988-07-05 1990-02-01 Electrotechniek Elden B V Gebalanceerde magneetschakelaar.

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2336871A (en) * 1942-02-28 1943-12-14 Gen Electric Electric switch
US2409115A (en) * 1943-12-08 1946-10-08 Westinghouse Electric Corp Shockproof contactor
US2417758A (en) * 1943-11-24 1947-03-18 Westinghouse Electric Corp Shockproof electromagnetic device
DE960746C (de) * 1955-02-15 1957-03-28 Licentia Gmbh Elektrischer Schalter, insbesondere Installations-Selbstschalter mit geradlinig bewegtem Kontaktschieber
DE1082653B (de) * 1956-07-10 1960-06-02 Siemens Ag Elektrisches Schaltgeraet mit Kontaktbruecke
GB893480A (en) * 1957-08-07 1962-04-11 Ass Elect Ind Improvements relating to electro-magnetic relays
DE1263185B (de) * 1962-08-03 1968-03-14 Siemens Ag Schalteinrichtung fuer Gleichstrommagnete
DE2700117A1 (de) * 1977-01-04 1978-07-13 Kloeckner Moeller Elektrizit Leitungsschutzschalter in schmalbauweise

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2336871A (en) * 1942-02-28 1943-12-14 Gen Electric Electric switch
US2417758A (en) * 1943-11-24 1947-03-18 Westinghouse Electric Corp Shockproof electromagnetic device
US2409115A (en) * 1943-12-08 1946-10-08 Westinghouse Electric Corp Shockproof contactor
DE960746C (de) * 1955-02-15 1957-03-28 Licentia Gmbh Elektrischer Schalter, insbesondere Installations-Selbstschalter mit geradlinig bewegtem Kontaktschieber
DE1082653B (de) * 1956-07-10 1960-06-02 Siemens Ag Elektrisches Schaltgeraet mit Kontaktbruecke
GB893480A (en) * 1957-08-07 1962-04-11 Ass Elect Ind Improvements relating to electro-magnetic relays
DE1263185B (de) * 1962-08-03 1968-03-14 Siemens Ag Schalteinrichtung fuer Gleichstrommagnete
DE2700117A1 (de) * 1977-01-04 1978-07-13 Kloeckner Moeller Elektrizit Leitungsschutzschalter in schmalbauweise

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2633447A1 (fr) * 1988-06-28 1989-12-29 Bosch Gmbh Robert Relais electromagnetique, stabilise contre des rebonds ou deplacements a vide
NL8801703A (nl) * 1988-07-05 1990-02-01 Electrotechniek Elden B V Gebalanceerde magneetschakelaar.

Similar Documents

Publication Publication Date Title
EP2893106B1 (de) Motorisierte schlagfeste verriegelungsvorrichtung
FR2701596A1 (fr) Disjoncteur télécommande à came de réarmement.
EP0766280A2 (de) Befehls- und Meldegerät für Schutzschalter
EP1968088A2 (de) Elektrisches Gerät für mehrpolige Abschaltung, das mit einem Antriebsmechanismus und Abschaltmodulen ausgestattet ist
FR2612687A1 (fr) Commutateur de puissance electrique comportant un systeme de contacts a ouverture electro-dynamique
EP0252198A1 (de) Elektromagnetischer Schalter
EP0156732B1 (de) Elektrisches Messer, insbesondere zum Öffnen von Austern
FR2697106A1 (fr) Coupe-circuit en boîtier moulé destiné à des opérations de commande à distance.
FR2570869A1 (fr) Perfectionnement aux ensembles de contact des interrupteurs a coupure
CA1304111C (fr) Electro-aimant, notamment pour l'actionnement des interrupteurs d'un appareil contacteur
EP0130208B1 (de) Schalter mit bedientem öffnen und schliessen und mit automatischer öffnung im fall eines überstromes
EP0704872B1 (de) Mittelspannungsschalter oder Schutzschalter
FR2489586A1 (fr) Interrupteur rotatif a enclenchement magnetique
BE1005375A0 (fr) Dispositif d'enclenchement brusque d'un levier de contact monte de facon mobile, en particulier pour un commutateur de protection contre des courants de defaut.
FR2808616A1 (fr) Electroaimant rotatif
EP0693765A1 (de) Elektromagnetischer Auslöser für einen Niederspannungsschutzschalter
EP1632970A2 (de) Elektromagnetische Auslöser und elektronischer Schutzschalter, die es enthält.
EP1298776A1 (de) Drehsteller
FR3093227A1 (fr) Dispositif de commande de contacts d’une ampoule à vide pour appareil de connexion électrique
FR2857779A1 (fr) Disjoncteur multipolaire
EP0693764A1 (de) Elektrischer Lastschalter mit elektromagnetischem Betätiger für Hochstrom
EP0794547A1 (de) Elektrischer Schutzschalter mit elektromagnetischen Betätiger und Betätigungsmechanismus
EP2442337B1 (de) Schlüsselkontaktvorrichtung
EP0905735A1 (de) Schutzschalter mit elektromagnetischen Auslöser mit Antrieb für einen beweglichen und gabelförmigen Kontakt
FR2608832A1 (fr) Dispositif de commutation electrique

Legal Events

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

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE CH DE FR GB IT LI LU NL SE

17P Request for examination filed

Effective date: 19880629

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: S.A. ACEC TRANSPORT

17Q First examination report despatched

Effective date: 19901129

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19910410

RIN1 Information on inventor provided before grant (corrected)

Inventor name: HENSENNE, JOSEPH FERNAND