EP0047355A2 - Dispositif de contacts pour appareils de commutation à basse tension, notamment des contacteurs - Google Patents

Dispositif de contacts pour appareils de commutation à basse tension, notamment des contacteurs Download PDF

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Publication number
EP0047355A2
EP0047355A2 EP81102806A EP81102806A EP0047355A2 EP 0047355 A2 EP0047355 A2 EP 0047355A2 EP 81102806 A EP81102806 A EP 81102806A EP 81102806 A EP81102806 A EP 81102806A EP 0047355 A2 EP0047355 A2 EP 0047355A2
Authority
EP
European Patent Office
Prior art keywords
contact
pieces
contact device
bridge
contact pieces
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
EP81102806A
Other languages
German (de)
English (en)
Other versions
EP0047355A3 (en
EP0047355B1 (fr
Inventor
Helmut Lemmer
Kurt Breidenbach
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.)
Square D Starkstrom GmbH
Original Assignee
Square D Starkstrom GmbH
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 Square D Starkstrom GmbH filed Critical Square D Starkstrom GmbH
Priority to AT81102806T priority Critical patent/ATE15294T1/de
Priority to CA000384256A priority patent/CA1171896A/fr
Priority to AU74472/81A priority patent/AU538765B2/en
Priority to ES505057A priority patent/ES8206083A1/es
Priority to BR8105610A priority patent/BR8105610A/pt
Priority to NO813016A priority patent/NO156770C/no
Priority to DK391581A priority patent/DK391581A/da
Publication of EP0047355A2 publication Critical patent/EP0047355A2/fr
Publication of EP0047355A3 publication Critical patent/EP0047355A3/de
Application granted granted Critical
Publication of EP0047355B1 publication Critical patent/EP0047355B1/fr
Expired legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/12—Contacts characterised by the manner in which co-operating contacts engage
    • H01H1/14—Contacts characterised by the manner in which co-operating contacts engage by abutting
    • H01H1/20—Bridging contacts
    • H01H1/2083—Bridging contact surfaces directed at an oblique angle with respect to the movement of the bridge
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H50/00—Details of electromagnetic relays
    • H01H50/54—Contact arrangements
    • H01H50/546—Contact arrangements for contactors having bridging contacts

Definitions

  • the invention relates to a contact device for low-voltage switching devices, in particular contactors, with at least two fixed contact bars having contact pieces and with at least one electrically conductive contact bridge which is movable under spring force and is also provided with contact pieces and which is arranged in a contact bridge holder.
  • Contact devices of the aforementioned type are known for example from DE-AS 25 25 467, CH-PS 247 323 and CH-PS 451 288.
  • the contact bridges consist of solid rails, in the middle of which a single contact pressure spring acts.
  • By means of different design measures for example by pivoting the solid contact bridge with the movable contact pieces or by rolling movements of the movable contact pieces on the fixed contact pieces, attempts have been made to master the problem of the contact pieces burning.
  • a disadvantage of all these known contact devices is that they are relatively large moving mass of the contact bridge with the movable contact pieces is present. This mass is required in this type of construction because the contact bridge in the form of a solid rail must be designed so that the required contact pressure forces are adequately transmitted by the contact pressure spring.
  • the invention has for its object to provide a contact device in which a weight and thus material savings are achieved, at the same time prevents the contacts from switching on and good adaptability of the movable contact pieces to the position of the fixed contact pieces is achieved.
  • the contact bridge consists of a flexible material and that a contact pressure spring is provided for each of the two contact pieces of the contact bridge.
  • the invention has a further advantage, namely that the movement of the flexible contact bridge between the two movable Contact pieces dampens the switch-on bounce.
  • the invention prevents the contacts from bouncing on. Since one can speak of a bounce-free contact device, the switch-on erosion is negligibly small, which in turn permits a reduction in the size of the contact pieces or the erosion pieces, or a contact life that remains the same has a significantly longer service life.
  • FIG. 1 to 3 show an exemplary embodiment of a contact device according to the invention in a low-voltage switching device in three different switching positions.
  • Figure 1 shows the off position.
  • the switching device has a lower housing part 1 with a bottom la and two lateral cylindrical recesses 1b.
  • the lower housing part 1 carries an upper lid-like housing part 2.
  • On raised parts of the base la there are two spaced-apart contact rails 3 and 4, which are expediently held by lateral guides 1c or groove-like recesses.
  • These contact rails 3, 4 have an outer, essentially horizontal rail part 3a or 4a, a rail part 3b, 4b which is bent obliquely downwards, a subsequent again horizontal rail part 3c, 4c and finally a rail part 3d, 4d bent upwards and outwards.
  • Fixed contact pieces 5, 6 sit on these latter rail parts 3d, 4d.
  • the fixed holding of these fixed contact pieces and the described contact rails takes place once by contact connecting screws 22, which engage in the screwed state with their lower screw bolt ends 22a in the cylindrical recesses 1b.
  • the leaf spring ends are designed such that there is a point support on the contact piece carriers (19).
  • holder 7 is a contact bridge 18 out.
  • This contact bridge 18 is also equipped with contact pieces 20 at its ends.
  • the two contact pieces 20 are each attached to a contact piece carrier 19, which in turn is then connected to the relevant end of the contact bridge 18.
  • the fixed connection takes place on the one hand between the contact piece carriers and the contact pieces and on the other hand between the flexible contact bridge and the contact piece supports by riveting, soldering, brazing, welding, spot welding, ultrasonic welding or squeezing etc.
  • the contact bridge 18 is made from a flexible material, advantageously from the material of a stranded wire.
  • a braided flat or round strand can preferably be selected as the strand, depending on the application and the spatial conditions.
  • the flexible contact bridge can also be constructed from another inherently flexible material, for example from current strips running parallel to one another, which are connected to one another at suitable points, for example in the region of the contact pieces.
  • the lower ends of the two contact pressure springs 13, 14 engage in the area to both ends of the flexible contact bridge in which the contact pieces or intermediate contact piece carriers are located.
  • In the interior of the recess 17 of the contact bridge holder 7 there is also a web 16 which runs perpendicular to the image plane according to FIG.
  • a driver rib 15 is arranged in the contact bridge holder 7 on both sides near the contact pressure springs 13, 14, which is in the switched-off position according to FIG. 1 at a certain distance above the flexible contact bridge 18 and at the same time above the movable contact pieces 20.
  • a driver rib 15 is shown on the left side only for the sake of simplicity. On the other side there is also a corresponding driver rib.
  • the flexible contact bridge 18 is held essentially straight in the contact bridge holder 7 in this exemplary embodiment.
  • the fixed contact pieces 5, 6 are also advantageously arranged in planes that run obliquely to the direction of movement of the movable contact pieces 20.
  • the inclined position is expediently chosen such that the fixed contact pieces are directed obliquely upwards towards the outside. This has the following advantages.
  • the inclined position of the fixed contact pieces and the straight or horizontal position of the movable contact pieces for this purpose when the contact pieces strike one another means that the movable contact pieces initially when switched on place on a predetermined outer edge on the relevant fixed contact piece.
  • each movable contact piece can inevitably adapt to the inclined position of the fixed contact piece in question.
  • this process takes place in reverse order, ie the contact surfaces of the contact pieces lying on top of one another initially open up to the outer edge without having lifted off and without an arc being generated.
  • the contact on the outer edge opens and an arc arises.
  • the contact piece carriers of the fixed and movable contact pieces in the discharge area of the arc are provided with solid arc discharge horns. Since the arc only arises at the outermost predetermined edge of the contact pieces, it is driven by the magnetic lines of force of the fixed contact rails and the quenching chamber plates directly from the above-described erosion area of the contact pieces onto the arc discharge horns, where the arc then breaks off at the outer edge and only here Burning causes.
  • the arcing horns are arranged on the same upper surface level with the contact pieces and closely connected to them.
  • the distance between the arc discharge horns for the discharge of the arc changes in the most favorable manner, i.e. there is a very small gap when opening and thus a cheap takeover of the arc.
  • the above-described lower switch-off burn-off which likewise brings about a reduction in the burn-off volume and at the same time an increase in the electrical life of the contact device.
  • the invention also lowers the thermal load on the contact pieces.
  • the predetermined tear-off edge of the arc in the erosion area of the contact pieces causes the remaining contact area to remain free of dirt, erosion scratches and soot, which means that the contact areas of the contact pieces are in the closed position always remain clean and contact is made on a perfect contact surface between the contact pieces.
  • the contact pieces move relative to each other, so that a certain self-cleaning of the contact surfaces in question is additionally guaranteed.
  • the invention also has considerable advantages with regard to the electrical switch-on welding safety.
  • the greatly increased electrical welding safety when switched on in comparison to the prior art results from the bounce-free behavior of the movable contact pieces and from the inclination of the fixed contact pieces, including the adaptability of the movable contact pieces to the fixed ones. For example, if a contact is loaded beyond the limit of its switch-on welding strength, it will weld more or less firmly. As a result of the inclined position of the fixed contact pieces, this welding only occurs when the first contact is made on the outer edge.
  • the relevant movable contact piece If the relevant movable contact piece is now moved further in the switch-on direction, it rotates or pivots around the welded outer edge up to the predetermined inclined position of the fixed contact piece, which is due to the flexible design the contact bridge is easily possible.
  • the welding is broken up again by this rotating or swiveling movement. The force required for this can easily be applied by the contact pressure spring in question.
  • a further advantageous embodiment of the invention is possible, namely in that the contact pressure springs 13, 14 are arranged obliquely, preferably at an acute angle to the direction of movement of the movable contact pieces in the contact bridge carrier 18.
  • the force for breaking the weld can be increased by appropriately inclining the contact pressure springs.
  • a further advantageous embodiment of the invention is that driving ribs 15 are arranged on the contact bridge holder 7 in such a way that the movable contact pieces are inevitably pivoted by them into the inclined position in accordance with the position of the fixed contact pieces. In this way, the breakup of a weld is also favored, since the driving rib during the switch-on process inevitably presses the welded movable contact piece, possibly with the arcing horn, into the inclined position corresponding to the fixed contact piece, and thus a stronger weld can be released again during the switch-on process. This is particularly advantageous for capacitor contactors.
  • a further advantageous embodiment of the invention is that the contact pieces, seen over their surface, and / or the arcing horns consist of different erosion material, such that in the area of the arcing edge a material with high thermal resistance and in the remaining area a material with good electrical conductivity and low current transfer resistance is selected. In this way, the thermal load capacity of the contact device can be further increased.
  • Figures 2 and 3 which essentially correspond to Figure 1, show different switching positions compared to Figure 1.
  • the contact bridge support 7 against the spring force of the springs 9 is shifted so far down that the movable contact pieces still held horizontally hit with their outer edge on the fixed oblique contact pieces.
  • the contact bridge carrier 7 is pressed down further, the flexible contact bridge 18 is bent downward by the rib 16 and, moreover, the driving rib 15 comes to rest as shown that the movable contact pieces are inevitably pivoted into the inclined position described above. It is understood that in this switch-on position the contact pressure springs 13, 14 are compressed accordingly.
  • the fixed contact pieces 5 and 6 are arranged in planes perpendicular to the direction of movement of the movable contact pieces 20. Accordingly, the contact rail parts 3d, 4d of the contact rails 3, 4 are bent into these horizontal planes. As FIG. 5 makes clear, in this case the flexible contact bridge 18 is bent far downward by the rib 16 as soon as the contact pieces meet. This also results in favorable movement conditions.
  • FIG. 6 essentially corresponds to that of FIGS. 1 to 3, but here the contact bridge holder 7 is designed differently and a different holder is provided.
  • the purpose of this design is that the switch-off arc can escape on all sides, since the contact pieces are kept free.
  • this design a form-fitting, simple mounting of the contact piece carriers with their contact pieces at the ends of the flexible contact bridge is possible.
  • FIG. 7 shows a contact device whose basic structure corresponds approximately to that according to FIGS. 4 and 5.
  • the contact bridge consists of a flexible material in the form of one or more leaf springs, namely in the exemplary embodiment according to FIG. 7 two leaf springs 24 and 25 are provided in succession in the direction of movement of the contact bridge and are guided in the contact bridge holder 7 with movement play.
  • Each leaf spring can be made very thin and is preferably made of copper bronze or brass bronze.
  • the contact pressure springs which are designed as helical springs in the previously explained exemplary embodiments, can be dispensed with, since the leaf springs simultaneously serve as contact pressure springs for the two movable contact pieces 20.
  • connection between the two movable contact piece carriers and the ends of the two leaf springs 24, 25 is expediently established by the spring pressure of the leaf springs. It is advantageous here that the movable contact piece carriers 19 are guided obliquely to the direction of movement of the contact bridge holder 7, and expediently by means of correspondingly obliquely designed lateral projections or stops 7e.
  • the contact points 24a, 24b, 25a, 25b at the ends of the leaf springs 24, 25 are advantageously provided with a highly conductive, thin contact material layer.
  • the leaf spring ends are designed such that there is a point support on the contact piece carriers 19. Due to the point contact of the leaf spring ends on the two contact piece carriers, which are very small in terms of their mass, these contact piece carriers can adjust very well to the fixed contact pieces during the switching-on process or adapt to them.
  • two leaf springs 24 and 25 are used, these expediently have a different length.
  • the two leaf springs are designed and arranged in such a way that the spring action occurs one after the other during the switch-on process. In this way, the switch-on forces for making contact are kept low during the switch-on process.
  • the outer longer leaf spring 24 first exerts the contact pressure until after a certain distance the second leaf spring 25 significantly increases the contact pressure.
  • the action of the second leaf spring 25 only comes into effect shortly before the final switch-on position, ie the contact receives a relatively high contact pressure for the current supply, which has a very favorable effect on the contact heating.
  • the contact devices according to the invention are mostly actuated by a magnetic drive (not shown).
  • a further improvement in the design of the contact device according to FIG. 7 can be achieved in that at least one leaf spring is assigned a good current-conducting strand.
  • the strand can advantageously be embedded between the two leaf springs 24, 25. However, one or both leaf springs can also be surrounded by a strand.
  • the contact device according to FIG. 7 has a further advantage, in particular for the switching of direct current, namely that the contacts have a particularly large opening path can be light without having to enlarge the external dimensions of the contact device.
  • the main reason for this is that the helical contact pressure springs of the previously described exemplary embodiments can be omitted.
  • the advantage of the large opening path of the contacts can also be achieved in the case of existing device designs if the existing contact bridge holder is replaced by a contact bridge holder with the illustrated leaf springs etc. according to FIG. 7.
  • the large opening path of the contacts is essential for controlling the arc, especially when switching direct current.
  • contact devices according to the invention can also have a plurality of contact rail pairs and flexible contact bridges, for example adjacent to one another perpendicular to the image plane. The same applies to the arrangement of two or more floors one above the other.
  • FIGS 8 and 9 illustrate another embodiment of the invention. It is illustrated here that it is possible due to the low weight of the flexible contact bridges 18 to make them relatively long and accordingly to arrange the fixed contact rails 3, 4 with the fixed contact pieces 5, 6 with such a large distance from one another that the coil 28 of the lower housing 32, which sits on a magnetic core 27 as usual, without having to disconnect the entire wiring of the contact device. To remove and, if necessary, replace the coil 28, it is only necessary to remove a cover 29 from the upper housing 31. Then the contact bridge holder 7 with the contact bridge (s) 18 and the movable contact pieces, which in turn are held in a frame-like component 30, together with the Remove the connected anchor 26 upwards.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Arc-Extinguishing Devices That Are Switches (AREA)
  • Contacts (AREA)
  • Push-Button Switches (AREA)
  • Breakers (AREA)
EP81102806A 1980-09-06 1981-04-13 Dispositif de contacts pour appareils de commutation à basse tension, notamment des contacteurs Expired EP0047355B1 (fr)

Priority Applications (7)

Application Number Priority Date Filing Date Title
AT81102806T ATE15294T1 (de) 1980-09-06 1981-04-13 Kontaktvorrichtung fuer niederspannungsschaltger|te, insbesondere schuetze.
CA000384256A CA1171896A (fr) 1980-09-06 1981-08-20 Organe de contact pour interrupteurs de basse tension
AU74472/81A AU538765B2 (en) 1980-09-06 1981-08-24 Contact device
ES505057A ES8206083A1 (es) 1980-09-06 1981-08-28 Perfeccionamientos en dispositivos de contacto para aparatosde maniobra de baja tension, en particular contactores
BR8105610A BR8105610A (pt) 1980-09-06 1981-09-02 Dispositivo de contato para comutadores de baixa tensao especialmente reles
NO813016A NO156770C (no) 1980-09-06 1981-09-04 Kontaktinnretning for lavspenningskoplingsapparater, saerlig kontaktorer.
DK391581A DK391581A (da) 1980-09-06 1981-09-04 Kontaktindretning for lavspaendingsafbrydere isaer sikringer

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE3033668A DE3033668C2 (de) 1980-09-06 1980-09-06 Kontaktvorrichtung für Niederspannungsschaltgeräte, insbesondere Schütze
DE8023868U DE8023868U1 (de) 1980-09-06 1980-09-06 Kontaktvorrichtung für Niederspannungs-Schaltgeräte, insbesondere Schütze
DE3033668 1980-09-06

Publications (3)

Publication Number Publication Date
EP0047355A2 true EP0047355A2 (fr) 1982-03-17
EP0047355A3 EP0047355A3 (en) 1982-09-22
EP0047355B1 EP0047355B1 (fr) 1985-08-28

Family

ID=25787688

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81102806A Expired EP0047355B1 (fr) 1980-09-06 1981-04-13 Dispositif de contacts pour appareils de commutation à basse tension, notamment des contacteurs

Country Status (3)

Country Link
US (1) US4401863A (fr)
EP (1) EP0047355B1 (fr)
DE (2) DE8023868U1 (fr)

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US4684772A (en) * 1985-04-09 1987-08-04 Square D Company Mounting apparatus for arc quenching plates for electric contacts
US4766273A (en) * 1985-06-17 1988-08-23 Eaton Corporation High current double-break electrical contactor
US4649242A (en) * 1985-09-24 1987-03-10 Siemens Energy & Automation, Inc. Stationary contact assembly for a current limiting circuit breaker
DE3579597D1 (de) * 1985-10-24 1990-10-11 Square D Deutschland Schaltgeraet.
US5260531A (en) * 1992-03-23 1993-11-09 Cooper Industries Explosion-proof switch with arc extinguishing gaseous byproduct venting feature and switch contact
DE29722281U1 (de) * 1997-12-17 1999-04-15 Klöckner-Moeller GmbH, 53115 Bonn Mehrfachunterbrechende Kontakteinrichtung für elektrische Schaltgeräte
US6031446A (en) * 1999-03-09 2000-02-29 Eaton Corporation Combination fuse clip and line terminal connection device
DE19935661A1 (de) * 1999-07-29 2001-02-01 Abb Patent Gmbh Schaltkontaktanordnung für einen Leistungsschalter
US20010030173A1 (en) * 2000-01-20 2001-10-18 Eduard Ulanovsky Contact arc-quenching system for power switchgear
US6837729B2 (en) * 2002-09-10 2005-01-04 Tyco Electronics Corporation High power electrical contactor with improved bridge contact mechanism
FI116865B (fi) * 2004-01-19 2006-03-15 Abb Oy Kytkinlaite
JP2006294459A (ja) * 2005-04-12 2006-10-26 Nec Tokin Corp 電磁継電器
US7633399B2 (en) 2007-02-27 2009-12-15 Eaton Corporation Configurable arc fault or ground fault circuit interrupter and method
FR2973559B1 (fr) * 2011-03-31 2013-03-29 Schneider Electric Ind Sas Pont de contact mobile
JP6193566B2 (ja) * 2012-01-25 2017-09-06 日本特殊陶業株式会社 継電器
JP6193565B2 (ja) * 2012-01-25 2017-09-06 日本特殊陶業株式会社 継電器
FR3003392B1 (fr) * 2013-03-15 2016-07-22 Schneider Electric Ind Sas Bloc unitaire de commutation et dispositif de commutation comportant au moins un tel bloc
JP2016110843A (ja) 2014-12-05 2016-06-20 オムロン株式会社 電磁継電器
US10176952B2 (en) * 2014-12-05 2019-01-08 Omron Corporation Electromagnetic relay
JP6414453B2 (ja) 2014-12-05 2018-10-31 オムロン株式会社 電磁継電器
CN105719912B (zh) * 2016-04-29 2018-03-13 浙江英洛华新能源科技有限公司 高压直流继电器防水平偏转机构
US10134551B2 (en) * 2016-09-21 2018-11-20 Astronics Advanced Electronic Systems Corp. Galvanically isolated hybrid contactor
EP3568867B1 (fr) * 2017-01-13 2020-11-04 ABB Schweiz AG Boîte de soufflage à plaques de diviseurs interconnectées par des résistances
US10002721B1 (en) * 2017-02-27 2018-06-19 Carling Technologies, Inc. Multiple contact circuit breaker

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DE2525467B2 (de) * 1975-06-07 1978-06-08 Calor-Emag Elektrizitaets-Aktiengesellschaft, 4030 Ratingen Kontaktanordnung
DE2714935A1 (de) * 1977-04-02 1978-10-12 Schaltbau Gmbh Kontaktstueck fuer mechanisch betaetigten elektrischen schalter, schuetzen oder relais

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Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE689356C (de) * 1937-08-17 1940-03-18 Voigt & Haeffner Akt Ges Kontaktklotzbefestigung an blattfederartigen Metallbaendern, insbesondere fuer Kontaktbruecken elektrischer Schaltapparate
DE957411C (de) * 1951-06-08 1957-01-31 Licentia Gmbh Kontaktanordnung fuer elektrische Selbstschalter und Schuetze
DE1200416B (de) * 1963-05-03 1965-09-09 Licentia Gmbh Kontaktsystem fuer elektrische Schaltgeraete, z. B. Schaltschuetze mit Brueckenkontaktgabe
DE1298608B (fr) * 1964-03-13 1975-03-13
CH451288A (de) * 1965-10-15 1968-05-15 Westinghouse Electric Corp Schalteinrichtung mit Kontaktbrücken und Verfahren zur Herstellung dieser Schalteinrichtung
DE1909460A1 (de) * 1968-08-05 1970-03-26 Teizo Fujita Magnetisches Steuerrelais
DE2525467B2 (de) * 1975-06-07 1978-06-08 Calor-Emag Elektrizitaets-Aktiengesellschaft, 4030 Ratingen Kontaktanordnung
DE2714935A1 (de) * 1977-04-02 1978-10-12 Schaltbau Gmbh Kontaktstueck fuer mechanisch betaetigten elektrischen schalter, schuetzen oder relais

Also Published As

Publication number Publication date
DE3033668A1 (de) 1981-03-19
US4401863A (en) 1983-08-30
EP0047355A3 (en) 1982-09-22
EP0047355B1 (fr) 1985-08-28
DE3033668C2 (de) 1983-12-15
DE8023868U1 (de) 1982-03-25

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