EP0080939B1 - Schütz mit Selbstschutzmittel gegen die Kontaktrückstosskräfte und dessen Anwendung in einem strombegrenzenden Schutzschalter - Google Patents

Schütz mit Selbstschutzmittel gegen die Kontaktrückstosskräfte und dessen Anwendung in einem strombegrenzenden Schutzschalter Download PDF

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Publication number
EP0080939B1
EP0080939B1 EP82402146A EP82402146A EP0080939B1 EP 0080939 B1 EP0080939 B1 EP 0080939B1 EP 82402146 A EP82402146 A EP 82402146A EP 82402146 A EP82402146 A EP 82402146A EP 0080939 B1 EP0080939 B1 EP 0080939B1
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EP
European Patent Office
Prior art keywords
piece
contactor
contact
magnetic
electromagnet
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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
Application number
EP82402146A
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English (en)
French (fr)
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EP0080939B2 (de
EP0080939A1 (de
Inventor
Elie Belbel
Michel Lauraire
André Haury
Christian Blanchard
Louis Fechant
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Telemecanique SA
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La Telemecanique Electrique SA
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Application filed by La Telemecanique Electrique SA filed Critical La Telemecanique Electrique SA
Priority to AT82402146T priority Critical patent/ATE18959T1/de
Publication of EP0080939A1 publication Critical patent/EP0080939A1/de
Application granted granted Critical
Publication of EP0080939B1 publication Critical patent/EP0080939B1/de
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    • 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
    • H01H77/101—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 with increasing of contact pressure by electrodynamic forces before opening

Definitions

  • the invention relates to the protection of contactors against the effects of contact separation due to repulsion forces between them.
  • a contactor is normally provided to support effective currents of the order of 12 In (or 6 In, depending on the ratings), In being the nominal current. Beyond this value, there is a risk of soldering and, at least, of contact wear, caused by various effects which will be analyzed below.
  • Overloading can occur either when the contactor is closed or during its closing. If it corresponds to currents which would exceed, in the absence of rapid protection means, for example 100 ln, the action of the switch member is very rapid, that is to say that the current which flows in the main contactor of the contactor reaches for example 40 to 50 In peak, then drops back to the value 0, in a time, of the order of 2 ms for example, much less than the duration of a half-cycle of the sector.
  • the switch member does not exert any action of significant limitation of the current during half-wave and, consequently, a current greater than 6 ln or 12 In can pass through the contactor.
  • the repulsive forces then manifest themselves in the vicinity of the crest of the current and, as they are much weaker than in the previous case, when they cease, the contact closes again on a still large current. This results in a significant risk of welding.
  • the invention proposes to compensate, during the time interval separating the appearance of the overload and the opening of the circuit, the effect of the repulsive forces of electro-dynamic nature which arise between the fixed and mobile contacts d '' a contactor, in order to prevent the contacts from being able to separate inadvertently with the consequences which would ensue (wear, risk of welding) for certain values of the overload current.
  • a contactor comprising, in a known manner, in particular by patents US-A-3123691 and FR-A-1 514069, a control electromagnet having a movable part, a contact assembly comprising at least a first part conductive support of at least one movable contact and at least a second piece conductive support of at least one fixed contact, connecting members between the movable part of the electromagnet and the first piece of movable contact support , an elastic member arranged to cooperate with said first movable contact support part in a direction which establishes a certain contact pressure, and means for locally concentrating the flux created by the flow of current in said conductive parts in the vicinity of said first conductive part, to exert on it a force of attraction which tends to cause the closure of the contacts.
  • this contactor is more particularly characterized in that said means comprise at least one first soft magnetic part rigidly coupled to a contact carrier integral with said movable part of the electromagnet and arranged so that, as soon as appears an overload current reaching the intensity that the standards require of a traditional contactor, that is to say six to fifteen times the nominal current, in said first conductive part said first magnetic part exerts a force of attraction on a part of said first conductive part and / or on a second piece of soft magnetic material integral with said first conductive piece or in direct support on said first conductive piece and subjected to the action of a contact pressure spring, said anchoring force being sufficient to counteract the effect of the repulsive forces which are then exerted between the fixed and mobile contacts, while the tensile force developed between the fixed part and the mobile part of the electromagnet is expected to be sufficient, on the one hand, to withstand the additional tensile force exerted on its movable part when said attraction force is exerted, without detachment of said mov
  • the compensation device does not contribute in a appreciable manner to modifying the contact pressure, which it only effectively reinforces when an overload develops forces. of notable repulsion.
  • the contact pressure is therefore provided, in the traditional way, by a pressure spring associated with the support of the movable contacts of the contactor.
  • said first magnetic part has the shape of a U the base of which is rigidly coupled to a contact carrier secured to the movable part of the electromagnet, while the second magnetic part is arranged to form a variable air gap with the upper ends of the branches of the U and that said part of the support conductor of the movable contacts has the form of a blade on which said second part is supported and engaging in the opening of the U by forming a narrow gap.
  • the magnetic part indirectly coupled to the mobile part of the electromagnet has the shape of a U and said part of the conductive support of the mobile contacts has the shape of a blade which engages in the opening of the U by forming a narrow air gap.
  • said second magnetic piece is held in abutment, by said contact pressure spring associated with the conductive support of the movable contacts, on said part of said support and forms a variable air gap with said first magnetic piece.
  • FIGs 1 to 5 there is shown a contact holder comprising an insulating part or contact holder 1 secured to the armature of an electromagnet, not shown, and two fixed contacts 20a-20b carried by conductors folded in "J" 2a-2b cooperating with a movable contact bridge 3 with two branches 3a-3b respectively carrying contact pads 30a-30b, on either side of a vertical blade 3c.
  • a contact pressure spring 4 is housed in a blade of non-magnetic material folded into a U, the lower part of which is arranged so that it can slide inside the part 1, and the upper part of which leaves the part. 1, is provided in the vicinity of its ends with two windows 50-51.
  • a U-shaped piece of soft magnetic material 6 is placed between the branches of the blade 5, in their upper part, and fixed at its base to the piece 1 by means of a pin 7.
  • the central vertical blade 3c which connects the two branches 3a -3b of the bridge 3 engages in the central groove 60 which is provided with the upper face of the part 6 and, as shown in FIGS. 2 and 3, when the contacts are open , the blade 3c, in edge support at the bottom of the groove 60, has its upper part which protrudes slightly from the groove, so that a second parallelepeledepiece 8, made of soft magnetic material, engaged by the projections 80- 81 with which its edges are provided, in the windows 50-51 and on the lower face of which the blade 3c is pressed, leaves a small gap between said lower face and the upper face of the part 6.
  • the spring 4 is pressed, at one end, against the underside of the part 6 and, at its other end, against the base of the part 5.
  • the part 1 When, the armature being attracted, the part 1 is driven downwards (arrow F, FIG. 2), the part 6, secured to the part 1 by the pin 7, moves the same distance a.
  • the spring 4, by pressing the bottom of the blade 5, drives the latter down over a smaller distance b, which corresponds to the distance between the pellets 20a and 30a on the one hand, 20b and 30b on the other hand .
  • the blade 5 drives the part 8 and the bridge 3, until the contacts are closed. At this time, the blade 5 can no longer move and, the part 6 continuing to descend, the spring 4 is compressed, thus ensuring a certain contact pressure and sufficient for nominal operation.
  • the arrangement and dimensioning is such that, for current intensities of the order of the nominal value ln, the vector sum of the attractive forces, and of the opposite electro-dynamic forces developed in the conductors folded in "J" , is practically negligible and the contact pressure is only ensured by the spring.
  • a contactor made with the figured device has an exceptionally large breaking and closing capacity, of the order of 40 to 50 ln, that is to say several times greater than that which would be obtained with the sole contact pressure spring.
  • the breaking or closing capacity may reach, in the described embodiment, which is particularly suitable for the production of large-caliber contactors, effective values of 10 KA to 15 KA instead of 4 KA for a device with a nominal rating of 300 A.
  • This makes it possible to envisage using such a contactor without associating it with a limiter or a fuse when the properties of the installation which it supplies make it possible to be certain that the short-circuit intensities -circuit will not exceed these values.
  • current monitoring means for example magneto-thermal
  • the part 6 will exert, for a closure on a peak current corresponding to an overload, a reaction on the armature in the form of a tensile force tending to tear the armature from the electromagnet. It is therefore important that measures are taken to prevent the armature from becoming detached from the fixed yoke of the electromagnet. To this end, it is advantageous to supply the electromagnet with rectified current during the holding period: the attraction force then never passing through the zero value, the risk of the armature tearing off is reduced. This measure may or may not be combined with a relatively large dimensioning of the electromagnet.
  • the additional holding force also has the effect of reducing the phenomenon of mechanical rebound of the contacts which manifests itself during closing, and therefore of reducing wear, starting from around 8 ln.
  • a piece 10 of soft magnetic material provided at its base with a double hooking tongue 101 which engages between two suitably profiled projections 90-91 of the internal wall of the part 9.
  • the part 10 has a U-shaped cross section and the double-cut movable contact bridge 11, which carries the two contact pads 110a-110b, has a central blade 110c, which engages in the U as shown in the figure 8.
  • the fixed contacts 120a and 120b are carried here by rectilinear blades 12a, 12b.
  • the piece 9 is provided, at its upper end, with a hoop 92 to which is fixed, by hooking complementary profiled parts, a piece of insulating material 13 provided with a central stud 130 by which one end of a spring is guided of pressure 14.
  • the other end of the spring cooperates with a recess 150 which is provided with an insulating part 15 which is supported, by its ends 151-152, on the two respective branches of the movable contact bridge 11.
  • the part 9 When, the movable armature of the electromagnet being attracted, the part 9 is driven downwards (arrow F 1 'in FIG. 7), the parts 10 and 13 undergo the same movement a, and the spring 14 moves the part 15, therefore the contact bridge 11, of the distance b 1 ⁇ a, which causes the movable contacts to come to bear on the fixed contacts.
  • the part 9 continuing its downward movement over a distance a i -b i , while the blade 110c is immobilized, it ceases to be in contact with the bottom of the U ( Figures 9 and 10) and the spring 14 is compressed to ensure contact pressure.
  • This force plays the same role as the attractive force due to the magnetic pieces 6-8 in the embodiment of Figures 1 to 5. It is however less important. To give it a usable value, we will advantageously reduce the air gap between the branches of the U precisely, by giving this central part the shape of a blade placed on edge in a narrow groove of the U.
  • the fixed contacts 12a-120a, 12b-120b are rectilinear as in that of Figures 6 to 10 and the insulating part 9, integral with the armature of the electromagnet, cooperates at its upper part with an insulating part 13 identical to that of FIGS. 6 to 10 and also serving to guide and support one end of the spring 14.
  • the latter bears, at its other end, on an insulating part 16 which itself supports, by its central triangular projecting part 160, on a first blade 17 of soft magnetic material, which in turn presses on a movable contact blade 18, provided with contacts 180a-180b.
  • a second blade 19 made of soft magnetic material is fixed, for example by means of a bolt 190, to the lower part of the part 9.
  • the part 19 separates from the parts 17-18 and, the part 13 undergoing the same displacement, greater than the distance between the contacts , the spring 14 which pressed the part 18 on the part 19 until the establishment of the contacts, is then compressed by an additional quantity to ensure the contact pressure.
  • the device could be applied to seedlings single contact breakers.
  • the shape and arrangement of the magnetic piece or pieces could be subject to variants, as well as those of the contact assembly itself.
  • the active air gaps are defined by the slot of the U.
  • parts corresponding to those referenced by 17, 18, 19 could have flat or rectilinear shapes, means not described, but obvious to those skilled in the art, moreover making it possible to ensure lateral support of the contact bridge and of the ferromagnetic parts.
  • Such an arrangement is therefore particularly advantageous due to the fact that it is much easier to manufacture a circuit breaker or a limiting stage, which is able to effectively limit the peak currents mentioned above, while it is very difficult to limit the peak currents of the order of 15 to 20 ln for which the faults of traditional contactors appear precisely.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Breakers (AREA)
  • Arc-Extinguishing Devices That Are Switches (AREA)
  • Contacts (AREA)
  • Emergency Protection Circuit Devices (AREA)
  • Professional, Industrial, Or Sporting Protective Garments (AREA)
  • Fuses (AREA)
  • Coupling Device And Connection With Printed Circuit (AREA)
  • Dry Shavers And Clippers (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)
  • Axle Suspensions And Sidecars For Cycles (AREA)

Claims (11)

1. Schütz mit einem Steuerelektromagneten bestehend aus: einem beweglichen Teil, einer Kontakteinheit mit mindestens einem ersten leitenden Teil (3, 11, 18), das mindestens einen beweglichen Kontakt trägt und mindestens einem zweiten leitenden Teil (2a, 2b, 12a, 12b), das mindestens einen festen Kontakt trägt, Verbindungsteilen (1, 5, 9, 13, 14, 15) zwischen dem beweglichen Teil des Elektromagneten und dem ersten Teil, welches den beweglichen Kontakt trägt, einem nachgiebigen Teil (4, 14) das mit besagten ersten Trägerteil des beweglichen Kontaktes in einer Richtung zusammenarbeitet, die einen gewissen Kontaktdruck hervorruft und Mitteln, um den Fluss der durch den Strom in besagten leitenden Teilen in der Nähe besagten ersten leitenden Teiles hervorgerufen wird, örtlich zu konzentrieren, um auf besagtes erste Teil eine Anziehung auszuüben, welche die Schliessung der Kontakte bewirkt, dadurch gekennzeichnet, dass besagte Mittel mindestens ein Teil (6, 10, 19) aus weichem magnetischem Material beinhalten, das starr mit einem mit besagtem beweglichen Teil des Elektromagneten fest verbundenen Kontaktträger gekuppelt und so angelegt ist, dass, wenn in besagtem leitenden Teil (3, 11, 18) ein Überstrom auftritt, der die von den Normen von einem bekannten Schütz geforderte Intensität erreicht, d.h. den 6 bis 15 fachen Nominalstrom, besagtes erste magnetische Teil eine Anziehungskraft auf einen Abschnitt (3c, 11 Oc) besagten leitenden Teiles und/ oder auf das zweite Teil (8, 17) aus weichem magnetischem Material ausübt, das mit besagtem leitenden Teil fest verbunden ist oder direkt auf besagtem leitenden Teil aufliegt und der Wirkung einer Kontaktdruckfeder unterworfen ist, wobei besagte Anziehungskraft genügt, um den Abstosskräften entgegenzuwirken, die dann zwischen den festen und beweglichen Kontakten wirksam werden, während die zwischen dem festen und beweglichen Teil des Elektromagneten ausgeübte Zugkraft genügend gross vorgesehen ist, um einerseits die zusätzliche Zugkraft zu ertragen,die auf seinen beweglichen Teil ausgeübt wird, wenn besagte Anziehungskraft wirksam wird, ohne dass besagter beweglicher Teil vom festen Teil getrennt wird und andererseits um, zusätzlich zu besagter Anziehungskraft, der Wirkung besagter Abstosskräfte entgegenzuwirken, wenn besagte Überlastung vor der Schliessung des Schützes eintritt.
2. Schütz nach Anspruch 1, dadurch gekennzeichnet, dass der Elektromagnet einen kleinen Luftspalt hat oder durch einen sehr starken Rufstrom gespeist wird, der vorzugsweise ein gleichgerichteter Wechselstrom mit geringer Schwingung ist.
3. Schütz nach Anspruch 1, dadurch gekennzeichnet, dass das erste magnetische Teil (6) die Form eines U hat, dessen Basis mittelbar mit dem beweglichen Teil des Elektromagneten gekuppelt ist, während das zweite magnetische Teil (8) so angelegt ist, dass es mit den oberen Enden der Schenkel des U einen ersten Luftspalt bildet und dass besagter Abschnitt (3c) des Trägerteils (3) für den beweglichen Kontakt die Form einer Lamelle hat, die mit besagtem zweiten magnetischen Teil (8) fest verbunden ist und in die Öffnung des U hineinreicht und dort einen zweiten Luftspalt bildet.
4. Schütz nach Anspruch 3, gekennzeichnet durch zwei leitende Teile, die den festen Kontakt tragen und ein J-förmiges Profil haben (2a-2b), durch eine Brücke beweglicher Kontakte (3) und durch Verbindungsteile mit: einem fest mit dem beweglichen Teil des Elektromagneten gekuppelten Isolierteil (1), besagtem ersten magnetischen Teil (8), das starr (bei 7) mit besagtem Isolierteil verbunden ist, einer Feder (4), welche besagtes nachgiebiges Kontaktdruckteil bildet und einerseits auf dem unteren Abschnitt besagten ersten magnetischen Teils (6) aufliegt und andererseits auf dem Grund einer U-förmig gebogenen Lamelle (5) aus nichtmagnetischem Material, die in besagtem Isolierteil (1 ) verschiebbar angeordnet ist, wobei das zweite magnetische Teil (8) mit dem oberen Abschnitt besagter Lamelle (5) fest verbunden ist, zwischen deren Schenkeln die zwei besagten magnetischen Teile (6, 8) einander gegenüber angeordnet sind.
5. Schütz nach Anspruch 1, dadurch gekennzeichnet, dass besagtes erste magnetische Teil (10) die Form eines U hat, während besagter Abschnitt (110c) des Trägerteils für den beweglichen Kontakt die Form einer Lamelle hat, welche in die Öffnung des U hineinreicht.
6. Schütz nach Anspruch 5, dadurch gekennzeichnet, dass besagte Verbindungsteile bestehen aus: einem ersten hohlen Isolierteil oder Kontaktträger (9), das starr mit dem beweglichen Teil des Elektromagneten verbunden ist und in dessen Innerem besagtes erstes magnetisches Teil (10) befestigt ist, einem zweiten Isolierteil (13), welches das obere Ende des ersten Teils (9) verschliesst, und einer Feder (14), welche besagtes nachgiebiges Kontaktdruckteil bildet und einerseits auf besagtem zweiten Isolierteil (13) aufliegt und andererseits auf einem dritten Isolierteil (15), das seinerseits auf den Enden des besagten Trägerteils (11) für den beweglichen Kontakt aufliegt und dass besagter Abschnitt (110c) sich zwischen den beiden besagten Enden befindet.
7. Schütz nach Anspruch 1, dadurch gekennzeichnet, dass besagtes zweites magnetisches Teil (17) von besagtem nachgiebigem Teil (14) auf besagtes Trägerteil (18) für den beweglichen Kontakt gedrückt wird und mit besagtem ersten magnetischem Teil (19) einen Luftspalt bildet.
8. Schütz nach Anspruch 7, dadurch gekennzeichnet, dass besagte Verbindungsteile bestehen aus: einem ersten hohlen Isolierteil (9) mit einem unteren Auflageabschnitt, auf dem besagtes erste magnetische Teil (19) befestigt ist, einem zweiten Isolierteil (13), das das obere Ende des ersten lsolierteils (9) verschliesst, und einer Feder (14), die besagtes nachgiebige Kontaktdruckteil bildet und einerseits auf besagtes zweites Isolierteil (13) drückt und andererseits auf ein drittes lsolierteil (16), das seinerseits auf besagtem zweiten magnetischen Teil (17) aufliegt.
9. Schütz nach Anspruch 7 oder 8, dadurch gekennzeichnet, dass besagtes Trägerteil (18) für den beweglichen Kontakt eine Lamelle ist, die eine Doppelunterbrechungskontaktbrücke (180a -180b) mit einem V-förmigen zentralen Abschnitt bildet, wobei die zwei magnetischen Teile (17, 19) gleichfalls die Form einer Lamelle mit einem V-förmigen zentralen Abschnitt haben, um mit der vorhergehenden zusammenzuarbeiten.
10. Schütz nach Anspruch 2, dadurch gekennzeichnet, dass der Elektromagnet von einem gleichgerichteten Strom während der Haltephase erregt wird.
11. Schaltung zur Einspeisung einer Ladung, für deren Schutz und den Schutz der Leitungen, welche kombiniert: einen Schütz nach einem der Ansprüche 1 bis 10 und ein Überstromunterbrechungs- und Begrenzungsteil, in Reihe mit den Hauptkontakten des Schützes, in das Begrenzungsteil die Spitzenströme auf einen Wert, der unter dem 50 fachen des Nominalstromes des Schützes liegt, begrenzt.
EP82402146A 1981-11-30 1982-11-25 Schütz mit Selbstschutzmittel gegen die Kontaktrückstosskräfte und dessen Anwendung in einem strombegrenzenden Schutzschalter Expired - Lifetime EP0080939B2 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT82402146T ATE18959T1 (de) 1981-11-30 1982-11-25 Schuetz mit selbstschutzmittel gegen die kontaktrueckstosskraefte und dessen anwendung in einem strombegrenzenden schutzschalter.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8122957A FR2517463A1 (fr) 1981-11-30 1981-11-30 Contacteur muni de moyens d'auto-protection contre les effets des forces de repulsion entre les contacts, et son association a un organe de coupure et de limitation des courants de court-circuit
FR8122957 1981-11-30

Publications (3)

Publication Number Publication Date
EP0080939A1 EP0080939A1 (de) 1983-06-08
EP0080939B1 true EP0080939B1 (de) 1986-04-02
EP0080939B2 EP0080939B2 (de) 1990-06-27

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EP82402146A Expired - Lifetime EP0080939B2 (de) 1981-11-30 1982-11-25 Schütz mit Selbstschutzmittel gegen die Kontaktrückstosskräfte und dessen Anwendung in einem strombegrenzenden Schutzschalter

Country Status (12)

Country Link
US (1) US4513270A (de)
EP (1) EP0080939B2 (de)
JP (1) JPS58103719A (de)
AT (1) ATE18959T1 (de)
BR (1) BR8206904A (de)
CA (1) CA1182156A (de)
DE (1) DE3270302D1 (de)
ES (1) ES8308143A1 (de)
FR (1) FR2517463A1 (de)
IE (1) IE53984B1 (de)
IN (1) IN159760B (de)
MX (1) MX151968A (de)

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FR3007888B1 (fr) * 2013-06-27 2015-07-17 Schneider Electric Ind Sas Contacteur electrique et procede de commande d'un tel contacteur
JP5845467B2 (ja) * 2014-06-18 2016-01-20 パナソニックＩｐマネジメント株式会社 接点装置
FR3023651B1 (fr) 2014-07-11 2017-10-20 Schneider Electric Ind Sas Disjoncteur electrique incluant un organe mecanique de blocage d'un pont mobile
KR20200000311A (ko) * 2018-08-31 2020-01-02 엘에스산전 주식회사 직류 릴레이
KR102324514B1 (ko) * 2018-08-31 2021-11-10 엘에스일렉트릭 (주) 직류 릴레이
KR102725406B1 (ko) * 2018-11-09 2024-11-04 샤먼 홍파 일렉트릭 파워 컨트롤즈 컴퍼니 리미티드 단락전류 방지용 직류 릴레이
CN110223883B (zh) * 2019-07-09 2025-10-28 森萨塔科技(芜湖)有限公司 高压直流继电器的推动结构
EP4086931B1 (de) * 2019-12-31 2026-03-11 Xiamen Hongfa Electric Power Controls Co., Ltd. Gleichstromrelais für anti-kurzschlussstrom und -lichtbogenlöschung
KR102524508B1 (ko) * 2020-11-04 2023-04-21 엘에스일렉트릭(주) 가동 접촉자부 및 이를 포함하는 직류 릴레이
KR102571418B1 (ko) * 2020-11-04 2023-08-28 엘에스일렉트릭(주) 가동 접촉자부 및 이를 포함하는 직류 릴레이
CN112563079B (zh) * 2020-11-30 2024-02-20 武汉同力同为科技有限公司 一种抗短路能力提升开关装置的动触桥保持结构
CN112542331B (zh) * 2020-11-30 2024-02-23 武汉同力同为科技有限公司 一种抗短路能力提升开关装置的动触桥保持结构
CN112542355B (zh) * 2020-11-30 2024-02-23 武汉同力同为科技有限公司 一种抗短路能力提升的直流继电器
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US3887888A (en) * 1973-04-04 1975-06-03 Arrow Hart Inc High current switch
JPS5529982U (de) * 1978-08-16 1980-02-27
FR2483683A1 (fr) * 1980-05-30 1981-12-04 Telemecanique Electrique Contacteur ayant des proprietes de disjoncteur

Also Published As

Publication number Publication date
FR2517463B1 (de) 1984-11-02
MX151968A (es) 1985-05-22
DE3270302D1 (en) 1986-05-07
EP0080939B2 (de) 1990-06-27
ATE18959T1 (de) 1986-04-15
ES517823A0 (es) 1983-08-16
IE822771L (en) 1983-05-30
JPH0463489B2 (de) 1992-10-12
JPS58103719A (ja) 1983-06-20
BR8206904A (pt) 1983-10-04
CA1182156A (fr) 1985-02-05
EP0080939A1 (de) 1983-06-08
US4513270A (en) 1985-04-23
ES8308143A1 (es) 1983-08-16
IE53984B1 (en) 1989-05-10
IN159760B (de) 1987-06-06
FR2517463A1 (fr) 1983-06-03

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