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EP0185107B1 - Motor protection switch - Google Patents

Motor protection switch Download PDF

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Publication number
EP0185107B1
EP0185107B1 EP84115679A EP84115679A EP0185107B1 EP 0185107 B1 EP0185107 B1 EP 0185107B1 EP 84115679 A EP84115679 A EP 84115679A EP 84115679 A EP84115679 A EP 84115679A EP 0185107 B1 EP0185107 B1 EP 0185107B1
Authority
EP
European Patent Office
Prior art keywords
motor protection
contact
circuit breaker
protection circuit
unit
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
Application number
EP84115679A
Other languages
German (de)
French (fr)
Other versions
EP0185107A1 (en
Inventor
Helmut Lemmer
Josef Risthaus
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 EP84115679A priority Critical patent/EP0185107B1/en
Priority to DE8484115679T priority patent/DE3478167D1/en
Priority to AT84115679T priority patent/ATE43027T1/en
Priority to ES542978A priority patent/ES8607617A1/en
Priority to DK558785A priority patent/DK165470C/en
Priority to US06/809,195 priority patent/US4688011A/en
Priority to CA000497714A priority patent/CA1249001A/en
Publication of EP0185107A1 publication Critical patent/EP0185107A1/en
Application granted granted Critical
Publication of EP0185107B1 publication Critical patent/EP0185107B1/en
Expired legal-status Critical Current

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Classifications

    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/02Housings; Casings; Bases; Mountings
    • H01H71/0207Mounting or assembling the different parts of the circuit breaker
    • H01H71/0228Mounting or assembling the different parts of the circuit breaker having provisions for interchangeable or replaceable parts
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H89/00Combinations of two or more different basic types of electric switches, relays, selectors and emergency protective devices, not covered by any single one of the other main groups of this subclass
    • H01H89/06Combination of a manual reset circuit with a contactor, i.e. the same circuit controlled by both a protective and a remote control device
    • H01H89/08Combination of a manual reset circuit with a contactor, i.e. the same circuit controlled by both a protective and a remote control device with both devices using the same contact pair

Definitions

  • the invention relates to a motor protection switch, which can optionally be assembled from independent units, the units having a switching chamber with a contact system, an electromagnetic drive, thermal and magnetic triggers and contact modules.
  • Such a motor protection normally consists of a contactor to which a thermal motor protection is assigned. Both the entire contact system and the magnet system by which the contact system is actuated, and finally the thermal motor protection part, are accommodated in a single housing of a certain design, the latter only triggering when the current load or thermal load is to a certain extent exceeds.
  • This thermal motor protection works relatively sluggish in practice, because the current load or the thermal load usually increases very slowly.
  • a separate fuse is still required for this purpose, which has so far been housed in a separate housing outside of the previously described contactor housing. In order to be able to make the necessary electrical connections, a total of eighteen connections are required.
  • the invention is based on the knowledge that there is a different need in practice in relation to motor protection switches in accordance with the technical circumstances. For example, in some cases you only need a switch with a contact system that can be switched on and off manually, but then the motor protection must be guaranteed for all load cases. In another case, the contact system should at least be switched on by an electromagnetic drive. Furthermore, for example, motor protection switches with a contact system, an electromagnetic drive and with an auxiliary contact system are required, with motor protection finally being guaranteed for all operating cases. The numerous different constructions or designs then result from these different requirements.
  • Motor protection switch is known from DE-B-1 022 298. It is a self-switch that can be assembled from assemblies and can also be upgraded as a motor protection switch.
  • the automatic switch has a switch base and further individual attachable assemblies.
  • the base part of the switch consists of a rear derailleur drive, a key switch and an attached switching chamber in which the actual switching element with contact sets is located.
  • the individual subassemblies can be attached to this switch base, namely a residual current release, a quiescent current release, a shunt release, a connection plate or instead a current release for thermal or magnetic release, also a summation current transformer and an auxiliary switch.
  • this circuit breaker offers great variation, but in order to obtain a functional motor protection switch, the switch base must first be assembled from several components, which then includes at least one of the current releases and the auxiliary switch, and finally a separate component for motor protection thermal and magnetic tripping can be applied.
  • the work required for this is laborious and time-consuming and can only be carried out by a well-trained specialist.
  • a contactor which, for manufacturing reasons, has several housing parts with a built-in contact system and magnetic drive. However, these are not independent, functional units because they are required for the operation of the contactor. There is no motor protection here.
  • the advantage of this contactor is, however, that the housing parts are built one on top of the other perpendicular to a mounting plane and can be designed in a common standard width, so that this contactor is suitable for row-by-row construction in control cabinets.
  • a motor protection switch is known from DE-B-2 003 328, in which the thermal and magnetic triggers act separately via a lever mechanism on a contact bridge holder common to all contact bridges.
  • the invention has for its object to provide a fully effective motor protection switch in its simplest basic form, which can be easily expanded as required without exceeding predetermined width dimensions.
  • a first structural unit as the switching unit comprises the contact system, the thermal and magnetic releases, a lever mechanism between the releases and a contact bridge holder common to all contact bridges and mechanical connection means on both sides in the direction of movement of the contact bridge holder, that a second structural unit contains only the electromagnetic drive and can be fastened to the side of the first structural unit that is to be located after the fastening plane, and that a third structural unit can be attached as a contact module unit to the side of the first structural unit that is remote from the fastening plane.
  • the main advantage is achieved that the individual units that make up the main cost factor can always be manufactured the same and in series, regardless of which units the motor protection switch is ultimately assembled according to the requirements of practice.
  • the individual different motor protection switches such as base plates and / or covers, push buttons and, if necessary, connecting elements between the individual structural units.
  • these different small parts are not a cost factor and can be easily attached to the structural units without a great deal of time, and advantageously by simply plugging them together. Since different motor protection switches can be built up from the units, there is no need to stock up different motor protection switches. It is based on the knowledge that z. B.
  • all units have the same width, preferably a standardized width.
  • FIG. 1 Figures 1, 4 and 7 to 9 illustrate an embodiment of a motor protection switch with only one structural unit, namely a switching unit 1.
  • fields 2, 3 and 4 which are provided for the arrangement of the connections.
  • the fields are completely or partially covered with platelets in order to achieve safety against contact with the connection screws, but slots or openings (not shown) for leaving the connection lines are left free.
  • the connection screws can be operated with a screwdriver, which can be inserted through holes 25, 26, 27 and 28 and two further holes on the back.
  • the holes are located in cover parts 23 and 24 (FIG. 4) on both sides of the actual cover 5, which is designed as an attachment according to FIG.
  • the lid has two holes 20 and 21 through which two manually operable pushbuttons 6 and 7 protrude outwards, which are intended for switching on and off.
  • the cover parts 23 and 24 are followed by lugs 29 and 30 which, as explained in more detail below, essentially consist of platelets as protection against contact.
  • Figures 1 and 4 are simplified representations in this regard.
  • the switching unit 1 for the sole construction according to FIGS. 1, 4 and 7 to 9 is also provided with a base plate 8, which in turn carries a quick-locking device on the underside, preferably for attachment to a standard mounting rail.
  • the quick locking device as shown in particular in FIG. 9, consists of a slide with an outwardly projecting frame part 9, into which a screwdriver is inserted and the slide in the illustration according to FIG. 9 is shifted to the left against the force of a spring (not shown) relative to a guide can be.
  • the base plate 8 also has at its ends projections 31 and 32, which are shown in simplified form in FIGS. 1 and 4, in the practical embodiment consist essentially of plates which grip over the fields 2, 3 and 4 and contribute to protection against contact .
  • FIGS. 7 and 9 show more clearly the design of the cover 5 and the base plate 8 with the projections 29, 30 and 31, 32, which have molded-on plates 49, 50, 51 or 52, 53 and 54 for safety against contact with the contact connections. These plates engage between ribs 55 of the housing of the switching unit 1 and are held between the ribs.
  • the approaches can also receive ribs running parallel to the image plane of FIG. 9. In Fig. 9 the longitudinal section runs through two such ribs of the lugs 31 and 32 of the base plate.
  • Fig. 9 also shows a bore 56 in the cover part 23 corresponding to the holes 25 to 28 explained above.
  • a contact terminal screw 57 which is screwed into a terminal 68 and the respective connection between the respective fixed contact rails 63, 64 and the outside lead line 58 produces.
  • the fixed contact rails 63 and 64 are part of a contact system with a contact bridge holder 61 and spring bridged contact bridges 62 arranged therein.
  • the switching unit 1 has a thermal release 65 and a magnetic release 66.
  • the thermal release 65 and the magnetic release 66 act separately via a lever mechanism 67 shown in simplified form on a contact bridge holder 61 common to all contact bridges.
  • Both the thermal release 65 and the magnetic release 66 consist of a number of individual releases, which corresponds to the number of phases. In this exemplary embodiment, three phases and accordingly a total of only six connections are provided.
  • the thermal release 65 and the magnetic release 66 are advantageously connected in series in the working current, i.e. in the respective phases.
  • the thermal release 65 is also provided with a dial for adjusting the current at a suitable point.
  • the pushbuttons 6 and 7 are under the pressure of springs 60.
  • the pushbuttons have downwardly projecting projections 59 which serve for better guidance and act on the contact bridge holder 61 for the on and off actuation via a suitable mechanism.
  • the construction is such that when the push-button is pressed, the switch-on takes place and the contact bridge holder is locked in the switched-on position. This lock can be released suddenly by pressing the off pushbutton.
  • the thermostatic release 65 and the magnetic release 66 act on the interlock independently of one another in the event of an overload in such a way that the entire switch-off takes place in the event of an overload of even one phase.
  • FIGS. 10 and 11 illustrate another embodiment of a motor circuit breaker, but again the switching unit 1 forms the central unit, so that the above explanations apply mutatis mutandis.
  • the motor protection switch here essentially consists of two structural units, namely the switching unit 1 and an electromagnetic drive unit 15.
  • the electromagnetic drive unit 15 is connected directly to the switching unit 1 on the side facing the fastening level, that is to say on the underside according to FIGS. 10 and 11 .
  • the armature 40 is connected to the contact bridge holder 61 by means of a screw connection 70.
  • the bottom of the electromagnetic drive unit 15 is provided with a quick locking device which corresponds to the devices 9, 10 and 11 explained above, but a separate base plate is not required here.
  • the cover 12 of the switching unit 1 corresponds essentially to the cover 5, but is modified in that it has only one hole 33 for the passage of a manual switch 13.
  • the electromagnetic drive unit 15 has two housing parts 16 and 17.
  • the core 41 and the coil 42 of the electromagnet are accommodated in the housing side 17 lying after the fastening level, that is to say in the lower housing part, while in the housing part 16 attached to the switching unit 1 the armature 40 of the electromagnet is kept movable.
  • An intermediate plate 14 can be provided as a connecting plate between the electromagnetic drive unit 15 and the switching unit 1. This plate can also be omitted if the two units 1 and 15 are to be connected directly to one another.
  • a connecting piece 69 is advantageously provided, which according to FIG. 11 is provided on both sides of the armature 40 with recesses 77 opening on one side, into which pins 78 of a U-shaped guide piece 76 fastened to the armature 40 engage in a form-fitting manner.
  • Approaches 34 and 35 can again be provided on the cover 12 in accordance with the above explanations and corresponding approaches 36 and 37 on the housing part 16.
  • the upper end face of the housing part 16 according to FIG. 5 has two bores 38 and 39 which lead through guide sleeves serve with the connecting screws 70.
  • the lower housing part 17 can also be provided with diagonally opposite claws 43 and 44 with holes, so that the motor protection switch can also be fastened to a plate in a conventional manner with screws.
  • FIGS. 3, 6, 12 and 13 illustrate a further exemplary embodiment of a motor protection switch which is now made up of three structural units, namely the described switching unit 1, the electromagnetic drive unit 15 also described and a further structural unit, namely a contact module unit 18.
  • the contact module unit 18 has a manual switch button 19.
  • the switching unit 1 is provided with a somewhat different cover 12 according to FIG. 6, which is provided on the front side with four slots 47, in which hooks 48 can engage, which are formed on the adjacent edge of the housing of the contact module unit 18.
  • a corresponding simple connection between the pushbutton 19 and a connecting part 45 is achieved in that the pushbutton is provided with a foot piece which engages in a recess in the connecting part 45.
  • the push button 19 works together with a contact bridge holder 73, which has a number of auxiliary contact bridges 72, which in turn cooperate with fixed contact connecting rails 74 and 75.
  • all of the structural units 1, 15 and 18 have the same width 79, preferably a standardized width. All units 1, 15 and 18 are built one on top of the other perpendicular to a mounting plane, which in FIG. 13 runs perpendicular to the image plane at the lower end of the motor protection switch. As described, the structural units are operatively releasably connected to one another by mechanical connecting means.

Landscapes

  • Transition And Organic Metals Composition Catalysts For Addition Polymerization (AREA)
  • Breakers (AREA)
  • Protection Of Generators And Motors (AREA)
  • Control Of Direct Current Motors (AREA)
  • Operating, Guiding And Securing Of Roll- Type Closing Members (AREA)
  • Control Of Electric Motors In General (AREA)
  • Switch Cases, Indication, And Locking (AREA)
  • Lock And Its Accessories (AREA)
  • Switches With Compound Operations (AREA)

Abstract

A motor safety switch which eliminates much of the costs of conventional wiring, material and labor, the motor safety switch being formed of a plurality of assembled independent components; a first of the components including a switch unit having a contact system, a thermal tripper and a magnetic tripper; a second of the components being an electromagnetic drive unit; a third of the components being a modular contact unit; and the independent components are maintained by mechanical connectors in selected assembled relationship to include either all of the aforementioned independent components or selective subassemblies thereof.

Description

Die Erfindung bezieht sich auf einen Motorschutzschalter, welcher wahlweise aus selbständigen Baueinheiten zusammensetzbar ist, wobei die Baueinheiten eine Schaltkammer mit einem Kontaktsystem, einen Elektromagnetantrieb, thermische und magnetische Auslöser sowie Kontaktmodule aufweisen.The invention relates to a motor protection switch, which can optionally be assembled from independent units, the units having a switching chamber with a contact system, an electromagnetic drive, thermal and magnetic triggers and contact modules.

Es sind bereits verschiedene Konstruktionen bzw. Bauarten von Motorschutzschaltern bekannt. Normalerweise besteht ein solcher Motorschutz aus einem Schütz, dem ein thermischer Motorschutz zugeordnet ist. In einem einzigen Gehäuse bestimmter Bauart ist also sowohl das gesamte Kontaktsystem als auch das Magnetsystem, durch welches das Kontaktsystem betätigt wird, und schließlich der thermische Motorschutzteil untergebracht, wobei der letztere nur dann eine Auslösung bewirkt, wenn die Strombelastung bzw. thermische Belastung ein gewisses Maß überschreitet. Dieser thermische Motorschutz arbeitet in der Praxis verhältnismäßig träge, weil auch die Strombelastung bzw. die thermische Beanspruchung meist sehr langsam ansteigt. Um den betreffenden Elektromotor auch gegen plötzlich auftretende Störungen, z. B. Kurzschlüsse, zu sichern, ist hierfür noch eine separate Sicherung erforderlich, die bisher in einem separaten Gehäuse außerhalb des vorerläuterten Schützengehäuses untergebracht ist. Um die notwendigen elektrischen Verbindungen herstellen zu können, bedarf es dazu insgesamt achtzehn Anschlüssen.Various designs and types of motor protection switches are already known. Such a motor protection normally consists of a contactor to which a thermal motor protection is assigned. Both the entire contact system and the magnet system by which the contact system is actuated, and finally the thermal motor protection part, are accommodated in a single housing of a certain design, the latter only triggering when the current load or thermal load is to a certain extent exceeds. This thermal motor protection works relatively sluggish in practice, because the current load or the thermal load usually increases very slowly. To the electric motor in question also against sudden disturbances, e.g. B. to secure short circuits, a separate fuse is still required for this purpose, which has so far been housed in a separate housing outside of the previously described contactor housing. In order to be able to make the necessary electrical connections, a total of eighteen connections are required.

Bekannt ist ferner, an ein normales Schütz, bestehend aus einem Kontaktsystem und einem Magnetsystem, über elektrische Leitungen einen separaten Motorschutzschalter anzuschließen. Hierfür sind insgesamt zwölf Anschlüsse erforderlich, an denen jeweils elektrische Leitungen angeschlossen werden müssen.It is also known to connect a separate motor protection switch to a normal contactor consisting of a contact system and a magnet system via electrical lines. This requires a total of twelve connections, to which electrical lines must be connected.

Bei beiden Bauarten ist die Verdrahtung umständlich und zeitaufwendig und es wird nicht nur ein Materialaufwand für die elektrischen Leitungen, sondern auch für die vielen Anschlüsse an den Geräteteilen benötigt. Abgesehen von diesem Installationsaufwand wird auch bei diesen Mehrfachgeräten viel Raum z. B. bei der Unterbringung in einem Schaltschrank benötigt.With both types of wiring, the wiring is cumbersome and time-consuming and not only a material expenditure for the electrical lines, but also for the many connections to the device parts is required. Apart from this installation effort, a lot of space is also required for these multiple devices. B. needed for accommodation in a control cabinet.

Andere bekannte Motorschutzschalter bestehen aus jeweils einer einzigen Baueinheit für einen ganz bestimmten Verwendungszweck.Other known motor protection switches each consist of a single structural unit for a very specific purpose.

Bekannt sind schließlich noch normale Schütze, die in einer einzigen Baueinheit mit dem Schütz integriert zusätzlich mit einem Hilfskontaktsystem ausgestattet sind.Finally, normal contactors are known which are integrated in a single structural unit with the contactor and additionally equipped with an auxiliary contact system.

Der Erfindung liegt die Erkenntnis zugrunde, daß in der Praxis in bezug auf Motorschutzschalter ein entsprechend den technischen Gegebenheiten unterschiedlicher Bedarf vorliegt. Beispielsweise benötigt man in einigen Fällen nur einen Schalter mit einem Kontaktsystem, welches von Hand ein- und ausgeschaltet werden kann, wobei dann aber der Motorschutz für alle Belastungsfälle gewährleistet sein muß. In einem anderen Fall soll zumindest das Einschalten des Kontaktsystems durch einen Elektromagnetantrieb erfolgen. Des weiteren benötigt man beispielsweise Motorschutzschalter mit einem Kontaktsystem, einem Elektromagnetantrieb und mit einem Hilfskontaktsystem, wobei schließlich noch der Motorschutz für alle Betriebsfälle gewährleistet werden soll. Aus diesen unterschiedlichen Forderungen resultieren dann die zahlreichen unterschiedlichen Konstruktionen bzw. Bauformen.The invention is based on the knowledge that there is a different need in practice in relation to motor protection switches in accordance with the technical circumstances. For example, in some cases you only need a switch with a contact system that can be switched on and off manually, but then the motor protection must be guaranteed for all load cases. In another case, the contact system should at least be switched on by an electromagnetic drive. Furthermore, for example, motor protection switches with a contact system, an electromagnetic drive and with an auxiliary contact system are required, with motor protection finally being guaranteed for all operating cases. The numerous different constructions or designs then result from these different requirements.

Ein zu Anfang angegebenerA specified at the beginning

Motorschutzschalter ist aus der DE-B-1 022 298 bekannt. Es handelt sich hierbei um einen aus Baugruppen zusammensetzbaren Selbstschalter, der auch als Motorschutzschalter aufrüstbar ist. Der Selbstschalter weist ein Schaltergrundteil und weitere einzelne ansetzbare Baugruppen auf. Der Schaltergrundteil besteht aus einem Schaltwerksantrieb, einem Schaltschloß und einer aufgesetzten Schaltkammer, in der sich das eigentliche Schaltelement mit Kontaktsätzen befindet. An dieses Schaltergrundteil lassen sich wahlweise die einzelnen Baugruppen ansetzen, nämlich ein Fehlerstromauslöser, ein Ruhestromauslöser, ein Arbeitsstromauslöser, eine Anschlußplatte oder statt dessen ein Stromauslöser zur thermischen oder magnetischen Auslösung, ferner ein Summenstromwandler sowie ein Hilfsschalter. Wegen der zahlreichen ansetzbaren Baugruppen bietet dieser Selbstschalter zwar große Variationsmöglichkeiten, um aber einen funktionsfähigen Motorschutzschalter zu erhalten, muß zunächst das Schaltergrundteil aus mehreren Bauelementen zusammengesetzt werden, wozu dann auch mindestens einer der Stromauslöser und der Hilfsschalter gehören und schließlich muß zum Motorschutz ein separates Bauelement für die thermische und magnetische Auslösung angesetzt werden. Die hierfür erforderlichen Arbeiten sind umständlich und zeitraubend und können auch nur durch einen gut ausgebildeten Fachmann ausgeführt werden.Motor protection switch is known from DE-B-1 022 298. It is a self-switch that can be assembled from assemblies and can also be upgraded as a motor protection switch. The automatic switch has a switch base and further individual attachable assemblies. The base part of the switch consists of a rear derailleur drive, a key switch and an attached switching chamber in which the actual switching element with contact sets is located. The individual subassemblies can be attached to this switch base, namely a residual current release, a quiescent current release, a shunt release, a connection plate or instead a current release for thermal or magnetic release, also a summation current transformer and an auxiliary switch. Because of the numerous assemblies that can be used, this circuit breaker offers great variation, but in order to obtain a functional motor protection switch, the switch base must first be assembled from several components, which then includes at least one of the current releases and the auxiliary switch, and finally a separate component for motor protection thermal and magnetic tripping can be applied. The work required for this is laborious and time-consuming and can only be carried out by a well-trained specialist.

Aus der EP-A-0 036 027 ist ein Schütz bekannt, welches aus Fertigungsgründen mehrere Gehäuseteile mit eingebautem Kontaktsystem und Magnetantrieb aufweist. Es handelt sich aber nicht um selbständige funktionsfähige Baueinheiten, weil sie zur Funktionsweise des Schützes erforderlich sind. Ein Motorschutz ist hierbei nicht gegeben. Der Vorteil dieses Schützes ist allerdings, daß die Gehäuseteile senkrecht zu einer Befestigungsebene aufeinander aufgebaut sind und in einer gemeinsamen Normbreite ausgeführt werden können, so daß sich dieses Schütz zum reihenweisen Aufbau in Schaltschränken eignet.From EP-A-0 036 027 a contactor is known which, for manufacturing reasons, has several housing parts with a built-in contact system and magnetic drive. However, these are not independent, functional units because they are required for the operation of the contactor. There is no motor protection here. The advantage of this contactor is, however, that the housing parts are built one on top of the other perpendicular to a mounting plane and can be designed in a common standard width, so that this contactor is suitable for row-by-row construction in control cabinets.

Des weiteren ist aus der DE-B-2 003 328 ein Motorschutzschalter bekannt, bei dem die thermischen und Magnetauslöser separat über einen Hebelmechanismus auf einen für alle Kontaktbrücken gemeinsamen Kontaktbrückenhalter einwirken.Furthermore, a motor protection switch is known from DE-B-2 003 328, in which the thermal and magnetic triggers act separately via a lever mechanism on a contact bridge holder common to all contact bridges.

Dem gegenüber liegt der Erfindung die Aufgabe zugrunde, einen in seiner einfachsten Grundform voll wirksamen Motorschutzschalter zu schaffen, der in einfacher Weise je nach Bedarf weiter ausgebaut werden kann, ohne vorgegebene Breitenabmessungen zu überschreiten.In contrast, the invention has for its object to provide a fully effective motor protection switch in its simplest basic form, which can be easily expanded as required without exceeding predetermined width dimensions.

Ausgehend von dem zu Anfang angebenen Motorschutzschalter wird die Aufgabe dadurch gelöst, daß eine erste Baueinheit als Schalteinheit das Kontaktsystem, die thermischen und magnetischen Auslöser, einen Hebelmechanismus zwischen den Auslösern und einen für alle Kontaktbrücken gemeinsamen Kontaktbrückenhalter und beiderseitige mechanische Verbindungsmittel in Bewegungsrichtung des Kontaktbrückenhalters umfaßt, daß eine zweite Baueinheit ausschließlich den Elektromagnetantrieb enthält und an der nach der Befestigungsebene zu liegenden Seite der ersten Baueinheit befestigbar ist, und daß eine dritte Baueinheit als Kontaktmoduleinheit an der von der Befestigungsebene abliegenden Seite der ersten Baueinheit anbringbar ist.Starting from the motor protection switch specified at the beginning, the object is achieved in that a first structural unit as the switching unit comprises the contact system, the thermal and magnetic releases, a lever mechanism between the releases and a contact bridge holder common to all contact bridges and mechanical connection means on both sides in the direction of movement of the contact bridge holder, that a second structural unit contains only the electromagnetic drive and can be fastened to the side of the first structural unit that is to be located after the fastening plane, and that a third structural unit can be attached as a contact module unit to the side of the first structural unit that is remote from the fastening plane.

Auf diese Weise wird der wesentliche Vorteil erzielt, daß die einzelnen Baueinheiten, die den hauptsächlichen Kostenfaktor ausmachen, immer gleich und in Serie gefertigt werden können, unabhängig davon, aus welchen Baueinheiten der Motorschutzschalter entsprechend den Forderungen der Praxis letztlich zusammengebaut ist. Es versteht sich, daß für die einzelnen unterschiedlichen Motorschutzschalter dann lediglich unterschiedliche Kleinteile verwendet werden, wie Bodenplatten und/oder Deckel, Drucktasten und ggfs. Verbindungselemente zwischen den einzelnen Baueinheiten. Diese unterschiedlichen Kleinteil stellen aber keinen Kostenfaktor dar und lassen sich leicht ohne großen Zeitaufwand an den Baueinheiten anbringen, und zwar vorteilhafterweise durch einfaches Zusammenstecken. Da man aus den Baueinheiten unterschiedliche Motorschutzschalter aufbauen kann, erübrigt sich eine größere Lagerhaltung von unterschiedlichen Motorschutzschaltern. Dabei wird von der Erkenntnis ausgegangen, daß z. B. in einem Schaltschrank in Richtung senkrecht zur Befestigungsebene stets genügend Platz vorhanden ist, daß aber in den beiden anderen Koordinatenrichtungen parallel zur Befestigungsebene nur sehr wenig Platz vorhanden ist, weil die Geräte reihenweise dicht nebeneinander und übereinander angeordnet werden, so daß alle bisher üblichen Motorschutzschalter sehr schwierig unterzubringen sind.In this way, the main advantage is achieved that the individual units that make up the main cost factor can always be manufactured the same and in series, regardless of which units the motor protection switch is ultimately assembled according to the requirements of practice. It goes without saying that then only different small parts are used for the individual different motor protection switches, such as base plates and / or covers, push buttons and, if necessary, connecting elements between the individual structural units. However, these different small parts are not a cost factor and can be easily attached to the structural units without a great deal of time, and advantageously by simply plugging them together. Since different motor protection switches can be built up from the units, there is no need to stock up different motor protection switches. It is based on the knowledge that z. B. in a cabinet in the direction perpendicular to the mounting level there is always enough space, but that there is very little space in the other two coordinate directions parallel to the mounting level, because the devices are arranged in rows close to each other and one above the other, so that all previously used motor protection switches are very difficult to accommodate.

Hierauf aufbauend wird unter anderem ferner vorgeschlagen, daß alle Baueinheiten eine gleiche Breite, vorzugsweise eine genormte Breite, aufweisen.Building on this, it is also proposed, among other things, that all units have the same width, preferably a standardized width.

Weitere vorteilhafte Ausgestaltungen der Erfindung ergeben sich aus den Unteransprüchen.Further advantageous embodiments of the invention result from the subclaims.

In der Zeichnung sind Ausführungsbeispiele der Erfindung im Schema dargestellt. Es zeigen:

  • Fig. 1 eine perspektivische Ansicht eines Motorschutzschalters mit einer Baueinheit,
  • Fig. 2 eine perspektivische Ansicht auf einen Motorschutzschalter mit zwei Baueinheiten,
  • Fig. 3 eine perspektivische Ansicht auf einen Motorschutzschalter, bestehend aus drei Baueinheiten,
  • Fig. 4 eine Explosionsdarstellung zu Fig. 1,
  • Fig. 5 eine Explosionsdarstellung zu Fig. 2,
  • Fig. 6 eine Explosionsdarstellung zu Fig. 3,
  • Fig. 7 eine andere perspektivische Darstellung eines Motorschutzschalters gemäß Fig. 1 in detaillierter Ausführung,
  • Fig. 8 einen vereinfachten Querschnitt zu Figur 7,
  • Fig. 9 einen vereinfachten Längsschnit zu Figur 7,
  • Fig. 10 einen Teillängsschnitt zu Fig. 2,
  • Fig. 11 einen Teilquerschnitt zu Fig 2,
  • Fig. 12 eine Längsseitenansicht zu Fig 3 und
  • Fig. 13 eine Vorderansicht zu Fig. 3.
In the drawing, exemplary embodiments of the invention are shown in the diagram. Show it:
  • 1 is a perspective view of a motor circuit breaker with a structural unit,
  • 2 shows a perspective view of a motor protection switch with two structural units,
  • 3 is a perspective view of a motor protection switch consisting of three structural units,
  • 4 is an exploded view of FIG. 1,
  • 5 is an exploded view of FIG. 2,
  • 6 is an exploded view of FIG. 3,
  • 7 shows another perspective illustration of a motor protection switch according to FIG. 1 in a detailed embodiment,
  • 8 shows a simplified cross section to FIG. 7,
  • 9 shows a simplified longitudinal section to FIG. 7,
  • 10 is a partial longitudinal section of FIG. 2,
  • 11 shows a partial cross section to FIG. 2,
  • Fig. 12 is a longitudinal side view of Fig. 3 and
  • 13 is a front view of FIG. 3.

Die Figuren 1, 4 und 7 bis 9 veranschaulichen ein Ausführungsbeispiel eines Motorschutzschalters mit nur einer Baueinheit, nämlich einer Schalteinheit 1. An der vorderen Stirnseite gemäß Fig. 1 befinden sich Felder 2, 3 und 4, die für die Anordnung der Anschlüsse vorgesehen sind. Das gleiche gilt für die in Fig 1 nicht sichtbare rückwärtige Stirnseite. Die Felder sind ganz oder teilweise mit Plättchen abgedeckt, um eine Berührungssicherheit gegenüber den Anschlußschrauben zu erzielen, wobei jedoch nicht gezeichnete Schlitze oder Öffnungen zum Herausführen der Anschlußleitungen freigelassen sind. Die Anschlußschrauben können mit einem Schraubendreher betätigt werden, der durch Löcher 25, 26, 27 und 28 und zwei weitere rückseitige Löcher von oben eingeführt werden kann. Die Löcher befinden sich in Deckelteilen 23 und 24 (Fig. 4) zu beiden Seiten des eigentlichen Deckels 5, der gemäß Figur 4 als Aufsatz ausgebildet ist, um den vereinfacht gezeichneten Drucktastenbauteil 22 aufnehmen zu können. Der Deckel weist zwei Löcher 20 und 21 auf, durch die zwei handbetätigbare Drucktasten 6 und 7 nach außen hin durchragen, die für Ein- und Ausschaltung bestimmt sind. An die Deckelteile 23 und 24 schließen sich nach unten verlaufende Ansätze 29 und 30 an, die wie weiter unten noch näher erläutert ist im wesentlichen aus Plättchen als Berührungsschutz bestehen. Die Figuren 1 und 4 sind diesbezüglich vereinfachte Darstellungen.Figures 1, 4 and 7 to 9 illustrate an embodiment of a motor protection switch with only one structural unit, namely a switching unit 1. At the front end according to FIG. 1 there are fields 2, 3 and 4, which are provided for the arrangement of the connections. The same applies to the rear end face, which is not visible in FIG. 1. The fields are completely or partially covered with platelets in order to achieve safety against contact with the connection screws, but slots or openings (not shown) for leaving the connection lines are left free. The connection screws can be operated with a screwdriver, which can be inserted through holes 25, 26, 27 and 28 and two further holes on the back. The holes are located in cover parts 23 and 24 (FIG. 4) on both sides of the actual cover 5, which is designed as an attachment according to FIG. The lid has two holes 20 and 21 through which two manually operable pushbuttons 6 and 7 protrude outwards, which are intended for switching on and off. The cover parts 23 and 24 are followed by lugs 29 and 30 which, as explained in more detail below, essentially consist of platelets as protection against contact. Figures 1 and 4 are simplified representations in this regard.

Die Schalteinheit 1 für den alleinigen Aufbau gemäß den Figuren 1,4 und 7 bis 9 ist ferner mit einer Bodenplatte 8 versehen, die ihrerseits auf der Unterseite eine Schnellverriegelungsvorrichtung vorzugsweise zur Befestigung an einer Normtragschiene trägt. Die Schnellverriegelungsvorrichtung besteht, wie insbesondere Fig. 9 zeigt, aus einem Schieber mit einem nach außen vorstehenden Rahmenteil 9, in welches ein Schraubendreher eingesetzt und der Schieber bei der Darstellung nach Fig. 9 nach links gegen die Kraft einer nicht gezeichneten Feder gegenüber einer Führung verschoben werden kann. Mit dem Schieber wird auch das innere Verriegelungsteil 10 mit nach links verschoben, so daß man den Motorschutzschalter auf eine nicht gezeichnete Normtragschiene aufsetzen kann, so daß das weitere feststehende Verriegelungsteil 11 hinter den einen Rand der Normtragschiene greift und beim Loslassen des Schiebers das andere Verriegelungsteil 10 hinter den anderen Rand der Normtragschiene greift und der Motorschutzschalter fest sitzt. Auch die Bodenplatte 8 weist an ihren Enden Ansätze 31 und 32 auf, die in den Figuren 1 und 4 vereinfacht gezeichnet sind, in der praktischen Ausführung im wesentlichen aus Plättchen bestehen, die über die Felder 2, 3 und 4 greifen und zu einem Berührungsschutz beitragen.The switching unit 1 for the sole construction according to FIGS. 1, 4 and 7 to 9 is also provided with a base plate 8, which in turn carries a quick-locking device on the underside, preferably for attachment to a standard mounting rail. The quick locking device, as shown in particular in FIG. 9, consists of a slide with an outwardly projecting frame part 9, into which a screwdriver is inserted and the slide in the illustration according to FIG. 9 is shifted to the left against the force of a spring (not shown) relative to a guide can be. With the slide, the inner locking part 10 is also moved to the left, so that the motor protection switch can be placed on a standard mounting rail, not shown, so that the further fixed locking part 11 engages behind one edge of the standard mounting rail and the other locking part 10 when the slide is released reaches behind the other edge of the standard mounting rail and the motor protection switch is firmly seated. The base plate 8 also has at its ends projections 31 and 32, which are shown in simplified form in FIGS. 1 and 4, in the practical embodiment consist essentially of plates which grip over the fields 2, 3 and 4 and contribute to protection against contact .

Die Figuren 7 und 9 zeigen deutlicher die Ausbildung des Deckels 5 und der Bodenplatte 8 mit den Ansätzen 29, 30 und 31, 32, welche angeformte Plättchen 49, 50, 51 bzw. 52, 53 und 54 zur Berührungssicherheit gegen die Kontaktanschlüsse aufweisen. Diese Plättchen greifen zwischen Rippen 55 des Gehäuses der Schalteinheit 1 ein und sind zwischen den Rippen gehalten. Die Ansätze können ferner parallel zur Bildebene der Fig. 9 verlaufende Rippen erhalten. In Fig. 9 verläuft der Längsschnitt durch zwei solche Rippen der Ansätze 31 und 32 der Bodenplatte.FIGS. 7 and 9 show more clearly the design of the cover 5 and the base plate 8 with the projections 29, 30 and 31, 32, which have molded-on plates 49, 50, 51 or 52, 53 and 54 for safety against contact with the contact connections. These plates engage between ribs 55 of the housing of the switching unit 1 and are held between the ribs. The approaches can also receive ribs running parallel to the image plane of FIG. 9. In Fig. 9 the longitudinal section runs through two such ribs of the lugs 31 and 32 of the base plate.

Fig. 9 zeigt weiterhin eine Bohrung 56 im Deckelteil 23 entsprechend den oben erläuterten Bohrungen 25 bis 28. Geschützt darunter befindet sich jeweils eine Kontaktanschlußschraube 57, die in einer Klemme 68 eingeschraubt ist und die jeweilige Verbindung zwischen den betreffenden Festkontaktschienen 63, 64 und der nach außen geführten Anschlußleitung 58 herstellt. Die Festkontaktschienen 63 und 64 sind Teil eines Kontaktsystems mit einem Kontaktbrückenhalter 61 und darin angeordneten unter Federdruck stehenden Kontaktbrücken 62.Fig. 9 also shows a bore 56 in the cover part 23 corresponding to the holes 25 to 28 explained above. Protected below is a contact terminal screw 57, which is screwed into a terminal 68 and the respective connection between the respective fixed contact rails 63, 64 and the outside lead line 58 produces. The fixed contact rails 63 and 64 are part of a contact system with a contact bridge holder 61 and spring bridged contact bridges 62 arranged therein.

Außer diesem Kontaktsystem weist die Schalteinheit 1 einen thermischen Auslöser 65 und einen Magnetauslöser 66 auf. Der thermische Auslöser 65 und der Magnetauslöser 66 wirken separat über einen vereinfacht dargestellten Hebelmechanismus 67 auf einen für alle Kontaktbrücken gemeinsamen Kontaktbrückenhalter 61 ein. Sowohl der thermische Auslöser 65 als auch der Magnetauslöser 66 bestehen aus einer Anzahl Einzelauslösern, die der Anzahl der Phasen entspricht. In diesem Ausführungsbeispiel sind drei Phasen und demgemäß insgesamt nur sechs Anschlüsse vorgesehen. Vorteilhaft sind der thermische Auslöser 65 und der Magnetauslöser 66 in Reihe in den Arbeitsstrom geschaltet, d.h. in die jeweiligen Phasen. Vorteilhafterweise ist der thermische Auslöser 65 an geeigneter Stelle noch mit einem Einstellrad zur Stromeinstellung versehen.In addition to this contact system, the switching unit 1 has a thermal release 65 and a magnetic release 66. The thermal release 65 and the magnetic release 66 act separately via a lever mechanism 67 shown in simplified form on a contact bridge holder 61 common to all contact bridges. Both the thermal release 65 and the magnetic release 66 consist of a number of individual releases, which corresponds to the number of phases. In this exemplary embodiment, three phases and accordingly a total of only six connections are provided. The thermal release 65 and the magnetic release 66 are advantageously connected in series in the working current, i.e. in the respective phases. Advantageously, the thermal release 65 is also provided with a dial for adjusting the current at a suitable point.

Nach Fig. 8 stehen die Drucktasten 6 und 7 unter dem Druck von Federn 60. Außerdem haben die Drucktasten nach unten ragende Vorsprünge 59, die zur besseren Führung dienen und über einen geeigneten Mechanismus auf den Kontaktbrückenhalter 61 für die Ein- und Ausbetätigung einwirken. Die Konstruktion ist so getroffen, daß bei Betätigung der Ein-Drucktaste die Einschaltung erfolgt und der Kontaktbrückenhalter in der eingeschalteten Stellung verriegelt wird. Diese Verriegelung kann durch die Aus-Drucktaste schlagartig aufgehoben werden. Auf die Verriegelung wirken unabhängig voneinander bei Überlastung auch der thermostatische Auslöser 65 und der Magnetauslöser 66 derart ein, daß bei Überlastung auch nur einer Phase die gesamte Ausschaltung erfolgt.8, the pushbuttons 6 and 7 are under the pressure of springs 60. In addition, the pushbuttons have downwardly projecting projections 59 which serve for better guidance and act on the contact bridge holder 61 for the on and off actuation via a suitable mechanism. The construction is such that when the push-button is pressed, the switch-on takes place and the contact bridge holder is locked in the switched-on position. This lock can be released suddenly by pressing the off pushbutton. The thermostatic release 65 and the magnetic release 66 act on the interlock independently of one another in the event of an overload in such a way that the entire switch-off takes place in the event of an overload of even one phase.

Die Figuren 2, 5, 10 und 11 veranschaulichen ein anderes Ausführungsbeispiel eines Motorschutzschalters, wobei aber wiederum die Schalteinheit 1 die zentrale Baueinheit bildet, so daß hierfür die obigen Ausführungen sinngemäß gelten. Der Motor-Schutzschalter besteht hier im wesentlichen aus zwei Baueinheiten, nämlich der Schalteinheit 1 und einer Elektromagnetantriebseinheit 15. Die Elektromagnetantriebseinheit 15 ist auf der nach der Befestigungsebene zuliegenden Seite der Schalteinheit 1 direkt an diese angeschlossen, gemäß den Figuren 10 und 11 also auf der Unterseite. Der Anker 40 ist mittels einer Schraubverbindung 70 mit dem Kontaktbrückenhalter 61 verbunden. Der Boden der Elektromagnetantriebseinheit 15 ist mit einer Schnellverriegelungsvorrichtung versehen, die der oben erläuterten Vorrichtung 9, 10 und 11 entspricht, jedoch entfällt hier eine separate Bodenplatte. Der Deckel 12 der Schalteinheit 1 entspricht im wesentlichen den Deckel 5, ist jedoch insofern abgeändert, als er nur ein Loch 33 für den Durchtritt einer Handeinschalttaste 13 aufweist. In vorteilhafter Ausgestaltung besitzt die Elektromagnetantriebseinheit 15 zwei Gehäuseteile 16 und 17. In dem nach der Befestigungsebene zu liegenden Gehäuseteit 17, also in dem unteren Gehäuseteil ist der Kern 41 und die Spule 42 des Elektromagneten untergebracht, während in dem an der Schalteinheit 1 angebrachten Gehäuseteil 16 der Anker 40 des Elektromagneten beweglich gehalten ist. Zwischen der Elektromagnetantriebseinheit 15 und der Schalteinheit 1 kann eine Zwischenplatte 14 als Verbindungsplatte vorgesehen sein. Diese Platte kann aber auch entfallen, wenn die beiden Baueinheiten 1 und 15 direkt miteinander verbunden werden sollen. Zwischen der Schraubverbindung 70 und dem Anker 40 ist vorteilhaft ein Verbindungsstück 69 vorgesehen, welches gemäß Figur 11 beiderseits des Ankers 40 mit einseitig öffnenden Ausnehmungen 77 versehen ist, in welche Zapfen 78 eines U-förmigen an dem Anker 40 befestigten Führungsstückes 76 formschlüssig eingreifen. An dem Deckel 12 können wieder Ansätze 34 und 35 entsprechend den obigen Ausführungen vorgesehen werden und entsprechende Ansätze 36 und 37 an dem Gehäuseteil 16. Die obere Stirnfläche des Gehäuseteiles 16 gemäß Fig. 5 weist zwei Bohrungen 38 und 39 auf, die zum Hindurchführen von Führungshülsen mit den Verbindungsschrauben 70 dienen. Außer der oben beschriebenen Schnellverriegelungsvorrichtung kann das untere Gehäuseteil 17 auch noch mit diagonal gegenüberliegenden Pratzen 43 und 44 mit Bohrungen versehen sein, so daß der Motorschutzschalter auch in herkömmlicher Weise mit Schrauben auf einer Platte befestigt werden kann.Figures 2, 5, 10 and 11 illustrate another embodiment of a motor circuit breaker, but again the switching unit 1 forms the central unit, so that the above explanations apply mutatis mutandis. The motor protection switch here essentially consists of two structural units, namely the switching unit 1 and an electromagnetic drive unit 15. The electromagnetic drive unit 15 is connected directly to the switching unit 1 on the side facing the fastening level, that is to say on the underside according to FIGS. 10 and 11 . The armature 40 is connected to the contact bridge holder 61 by means of a screw connection 70. The bottom of the electromagnetic drive unit 15 is provided with a quick locking device which corresponds to the devices 9, 10 and 11 explained above, but a separate base plate is not required here. The cover 12 of the switching unit 1 corresponds essentially to the cover 5, but is modified in that it has only one hole 33 for the passage of a manual switch 13. In an advantageous embodiment, the electromagnetic drive unit 15 has two housing parts 16 and 17. The core 41 and the coil 42 of the electromagnet are accommodated in the housing side 17 lying after the fastening level, that is to say in the lower housing part, while in the housing part 16 attached to the switching unit 1 the armature 40 of the electromagnet is kept movable. An intermediate plate 14 can be provided as a connecting plate between the electromagnetic drive unit 15 and the switching unit 1. This plate can also be omitted if the two units 1 and 15 are to be connected directly to one another. Between the screw connection 70 and the armature 40, a connecting piece 69 is advantageously provided, which according to FIG. 11 is provided on both sides of the armature 40 with recesses 77 opening on one side, into which pins 78 of a U-shaped guide piece 76 fastened to the armature 40 engage in a form-fitting manner. Approaches 34 and 35 can again be provided on the cover 12 in accordance with the above explanations and corresponding approaches 36 and 37 on the housing part 16. The upper end face of the housing part 16 according to FIG. 5 has two bores 38 and 39 which lead through guide sleeves serve with the connecting screws 70. In addition to the quick locking device described above, the lower housing part 17 can also be provided with diagonally opposite claws 43 and 44 with holes, so that the motor protection switch can also be fastened to a plate in a conventional manner with screws.

Die Figuren 3, 6,12 und 13 veranschaulichen ein weiteres Ausführungsbeispiel eines Motorschutzschalters der nunmehr aus drei Baueinheiten, nämlich der beschriebenen Schalteinheit 1, der ebenfalls beschriebenen Elektromagnetantriebseinheit 15 und einer weiteren Baueinheit, nämlich einer Kontaktmoduleinheit 18 aufgebaut ist. Die Kontaktmoduleinheit 18 besitzt eine Handeinschalttaste 19. In der oberen Stirnwand der mit einem Hilfskontaktsystem ausgestatteten Kontaktmoduleinheit 18 sind nicht gezeichnete Reihen von Bohrungen mit darunter liegenden Anschlußschrauben und an zwei einander gegenüberliegenden Seitenflächen Austrittsöffnungen für die Anschlußleitungen vorgesehen. Bei diesem Motorschutzschalter erhält die Schalteinheit 1 einen etwas anders ausgestalteten Deckel 12 gemäß Figur 6, der stirnseitig mit vier Schlitzen 47 versehen ist, in welcher Haken 48 eingreifen können, die am benachbarten Rand des Gehäuses der Kontaktmoduleinheit 18 angeformt sind. Durch einfaches Verschieben greifen die Haken 48 hinter die Ränder der Schlitze 47. Eine entsprechende einfache Verbindung zwischen der Drucktaste 19 und einem Verbindungsteil 45 wird dadurch erreicht, daß die Drucktaste mit einem Fußstück versehen ist, welches in einer Ausnehmung des Verbindungsteiles 45 eingreift. Die Drucktaste 19 arbeitet mit einem Kontaktbrückenhalter 73 zusammen, welcher einer Reihe von Hilfskontaktbrücken 72 aufweist, die ihrerseits wieder mit feststehenden Kontaktanschlußschienen 74 und 75 zusammenwirken Durch das Einschieben des Fußstückes 71 in das Verbindungsteil 45 ist eine formschlüssige Verbindung gewährleistet. Dieses Verbindungsteil 45 wirkt sodann mit einem Schaltstößel 80 der Schalteinheit 1 zusammen.FIGS. 3, 6, 12 and 13 illustrate a further exemplary embodiment of a motor protection switch which is now made up of three structural units, namely the described switching unit 1, the electromagnetic drive unit 15 also described and a further structural unit, namely a contact module unit 18. The contact module unit 18 has a manual switch button 19. In the upper end wall of the contact module unit 18 equipped with an auxiliary contact system there are not shown rows of bores with underlying connection screws and outlet openings for the connecting lines on two opposite side surfaces. In this motor protection switch, the switching unit 1 is provided with a somewhat different cover 12 according to FIG. 6, which is provided on the front side with four slots 47, in which hooks 48 can engage, which are formed on the adjacent edge of the housing of the contact module unit 18. By simply moving the hooks 48 reach behind the edges of the slots 47. A corresponding simple connection between the pushbutton 19 and a connecting part 45 is achieved in that the pushbutton is provided with a foot piece which engages in a recess in the connecting part 45. The push button 19 works together with a contact bridge holder 73, which has a number of auxiliary contact bridges 72, which in turn cooperate with fixed contact connecting rails 74 and 75. By inserting the foot piece 71 into the connecting part 45, a positive connection is ensured. This connecting part 45 then interacts with a switching plunger 80 of the switching unit 1.

Wie Fig. 13 deutlich macht, besitzen alle Baueinheiten 1, 15 und 18 die gleiche Breite 79, vorzugsweise eine genormte Breite. Dabei sind alle Baueinheiten 1, 15 und 18 senkrecht zu einer Befestigungsebene aufeinander aufgebaut, die in Figur 13 am unteren Ende des Motorschutzschalters senkrecht zur Bildebene verläuft. Die Baueinheiten sind, wie beschrieben, durch mechanische Verbindungsmittel wirkungsmäßig miteinander lösbar verbunden.As FIG. 13 makes clear, all of the structural units 1, 15 and 18 have the same width 79, preferably a standardized width. All units 1, 15 and 18 are built one on top of the other perpendicular to a mounting plane, which in FIG. 13 runs perpendicular to the image plane at the lower end of the motor protection switch. As described, the structural units are operatively releasably connected to one another by mechanical connecting means.

Claims (9)

1. Motor protection circuit breaker, which can be assembled optionally from independent components, the components comprising a break chamber with a contact system, an electromagnetic drive, thermal and magnetic trips and contact modules, characterised in that a first component comprises as the break unit (1) the contact system (61 to 64), the thermal and magnetic trips (65, 66), a lever mechanism (67) between the trips (65, 66) and a common contact bridge holder (61) for all contact bridges (62) and mechanical connecting means on both sides in the direction of movement of the contact bridge holder (61), that a second component exclusively contains the electromagnetic drive and can be attached to the side of the first component coming to lie behind the attachment plane and that a third component as a contact module unit (18) can be attached on the side of the first component remote from the attachment plane.
2. Motor protection circuit breaker according to Claim 1, characterised in that for sole assembly, the break unit (1) is provided with a base plate (8) with a fast-action locking device (9, 10, 11) and with a cover (5), which comprises two holes (20, 21), through which two hand-operated push buttons (6, 7) project outwards, which are intended for switching on and off.
3. Motor protection circuit breaker according to Claim 1 or 2, characterised in that the armature (40) of the electromagnetic drive unit (15) is connected by means of a screw connection (70) to the contact bridge holder (61), that the base of the electromagnetic drive unit (15) is provided with a fast-action locking device (9, 10, 11) and that the cover (12) of the break unit (1) comprises a hole (33) for a push button (13).
4. Motor protection circuit breaker according to Claim 3, characterised in that the electromagnetic drive unit (15) comprises two housing parts (16, 17), that the core (41) and the coil (42) are located in the housing part (17) coming to lie behind the attachment plane and the armature (40) of the electromagnet is located in the housing part (16) located on the break unit (1).
5. Motor protection circuit breaker according to Claim 3 or 4, characterised in that provided between the screw connection (70) and the armature (40) is a locking part (69), which is provided on both sides of the armature (40) with recesses (77) opening on one side, in which pins (78) of a U-shaped guide part (76) attached to the armature (40) engage in a form-locking manner.
6. Motor protection circuit breaker according to Claim 2, characterised in that the cover (12) of the break unit (1) is provided on its end face with four slots (49), in which hooks (48) on the adjacent edge of the housing of the contact module (18) engage and are secured by lateral sliding.
7. Motor protection circuit breaker according to Claim 6, characterised in that the manual starting push-button (19) of the contact module (18) is provided with a foot part (71) with the interposition of a contact bridge holder (73), which foot part (71) can be inserted laterally in a recess of a connecting part (45) and held in a form-locking manner and that this connecting part (45) co-operates with a switching plunger (80) of the break unit (1).
8. Motor protection circuit breaker according to one of the preceding Claims, characterised in that all the components (1, 15, 18) have the same width (79), preferably a standard width.
9. Motor protection circuit breaker according to one of the preceding Claims, characterised in that the cover (5; 12) and/or the base plate (8) are provided with projections (29, 30; 31, 32), which comprise attached small plates (49, 50, 51; 52, 53, 54) for shock-proofing with respect to the contact connections (57, 58, 68), which engage and are held between ribs (55) of the housing of the break unit (1).
EP84115679A 1984-12-18 1984-12-18 Motor protection switch Expired EP0185107B1 (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
EP84115679A EP0185107B1 (en) 1984-12-18 1984-12-18 Motor protection switch
DE8484115679T DE3478167D1 (en) 1984-12-18 1984-12-18 Motor protection switch
AT84115679T ATE43027T1 (en) 1984-12-18 1984-12-18 MOTOR PROTECTION SWITCH.
ES542978A ES8607617A1 (en) 1984-12-18 1985-05-09 Motor protection switch
DK558785A DK165470C (en) 1984-12-18 1985-12-03 MOTORVAERN
US06/809,195 US4688011A (en) 1984-12-18 1985-12-16 Motor safety switch
CA000497714A CA1249001A (en) 1984-12-18 1985-12-16 Motor safety switch

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP84115679A EP0185107B1 (en) 1984-12-18 1984-12-18 Motor protection switch

Publications (2)

Publication Number Publication Date
EP0185107A1 EP0185107A1 (en) 1986-06-25
EP0185107B1 true EP0185107B1 (en) 1989-05-10

Family

ID=8192362

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84115679A Expired EP0185107B1 (en) 1984-12-18 1984-12-18 Motor protection switch

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US (1) US4688011A (en)
EP (1) EP0185107B1 (en)
AT (1) ATE43027T1 (en)
CA (1) CA1249001A (en)
DE (1) DE3478167D1 (en)
DK (1) DK165470C (en)
ES (1) ES8607617A1 (en)

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Also Published As

Publication number Publication date
ATE43027T1 (en) 1989-05-15
DK558785D0 (en) 1985-12-03
DK558785A (en) 1986-06-19
DK165470B (en) 1992-11-30
US4688011A (en) 1987-08-18
DK165470C (en) 1993-04-19
CA1249001A (en) 1989-01-17
EP0185107A1 (en) 1986-06-25
ES8607617A1 (en) 1986-06-01
ES542978A0 (en) 1986-06-01
DE3478167D1 (en) 1989-06-15

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