EP2686862B1 - Magnet system and installation switch device - Google Patents

Magnet system and installation switch device Download PDF

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Publication number
EP2686862B1
EP2686862B1 EP12707758.4A EP12707758A EP2686862B1 EP 2686862 B1 EP2686862 B1 EP 2686862B1 EP 12707758 A EP12707758 A EP 12707758A EP 2686862 B1 EP2686862 B1 EP 2686862B1
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EP
European Patent Office
Prior art keywords
sleeve
magnet
circuit breaker
armature
conductor piece
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.)
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Application number
EP12707758.4A
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German (de)
French (fr)
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EP2686862A1 (en
Inventor
Ralf Wieland
Wolfgang Pump
Klaus-Peter Eppe
Rainer Ludovici
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ABB AG Germany
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ABB AG Germany
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Publication of EP2686862A1 publication Critical patent/EP2686862A1/en
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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/10—Operating or release mechanisms
    • H01H71/12—Automatic release mechanisms with or without manual release
    • H01H71/24—Electromagnetic mechanisms
    • H01H71/2463—Electromagnetic mechanisms with plunger type armatures
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/10—Operating or release mechanisms
    • H01H71/12—Automatic release mechanisms with or without manual release
    • H01H71/24—Electromagnetic mechanisms
    • H01H71/2454—Electromagnetic mechanisms characterised by the magnetic circuit or active magnetic elements
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
    • H01H9/44—Means for extinguishing or preventing arc between current-carrying parts using blow-out magnet
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
    • H01H9/46—Means for extinguishing or preventing arc between current-carrying parts using arcing horns

Definitions

  • the invention relates to a circuit breaker with an insulating material housing and with a magnet system having a yoke, a coil, a sleeve, a magnetic core, a plunger, a magnet armature and a restraint spring, wherein on the yoke, a conductor piece is formed, which carries a fixed contact piece, and wherein the magnet armature is slidably guided in the sleeve against the force of the fetlock spring, the magnet core being fixed to the conductor piece, the sleeve engaging the magnet core at its first end, and the magnet armature engaging the second end of the sleeve the sleeve is on and executable, according to the preamble of claim 1.
  • the invention further relates to a method for producing such a circuit breaker.
  • a magnet system for a circuit breaker is for example in the DE 198 45 476 A1 shown.
  • the DE 85 27 361 U1 shows an electromagnetically actuated short-circuit release member for installation in a provided with an arc extinguishing device circuit breaker with a control coil, lying therein magnetic core, and a firing pin.
  • the excitation coil is surrounded by a magnetic yoke frame-shaped.
  • the arc extinguishing device is arranged next to the short-circuit release member and is essentially composed of a splitter stack and two parallel, this flanking arc guide.
  • the sheet-metal-side leg of the magnetic yoke is formed by the magnet-side arc guide plate.
  • the DE 36 19 239 A1 shows a magnetic quick release for circuit breaker, wherein the magnetic yoke of an approximately U-shaped bow-shaped magnetic angle with bottom part and upstanding legs and a front side End plate with the one piece angled contact piece consists.
  • a retaining claw is bent laterally from the bottom part of the magnetic angle, which engages over the recess for the magnet armature from the outside and holds together the assembly of armature, trip rod and return spring during assembly on the magnetic yoke.
  • the quick release thus forms an easy-to-use pre-assembled assembly which can be inserted between the switch housing inwardly projecting support pin or support lugs and fixed in this manner in the switch housing, being ensured by a corresponding abutment web for the armature on the switch housing, that after assembly of the Quick release between the armature and the retaining claw an air gap is present to ensure in this way the magnetic flux when the switch is triggered.
  • the US Pat. No. 6,577,217 B1 shows a magnet subassembly for a modular electrical device of the circuit breaker type.
  • a yoke with a leg is at least partially integrated within the internal volume of an induction coil so that a range of the axial dimensions of the coil is allowed through the yoke.
  • One end of the coil is oriented so that its attachment to a fixed contact also allows the range of axial dimensions.
  • the US 2010/026430 A1 shows a switching device, with a magnetic trip device, wherein the magnetic trip device comprises at least one armature, a coil, a yoke and a yoke sleeve, wherein the armature and the yoke sleeve are arranged substantially in alignment, wherein the coil substantially around the armature and / or the yoke sleeve is arranged around, wherein the yoke is arranged around the coil, and wherein the armature is provided for at least indirectly triggering a separation device of the switching device. It is proposed to reduce the production, energy and raw materials expenditure for the production of the switching device, that the yoke sleeve is formed by at least one first bent part.
  • Circuit breakers with magnetic systems are used in electrical engineering to protect circuits against overload, z. As by short circuits or the like, and are used to automatically disconnect a line, ie, they trigger when such overload occurs.
  • a magnet system is used to trip the circuit breaker.
  • the magnet system has a movable armature, which in the rest position partially protrudes into a current-carrying coil flowing from the current in the line to be monitored. If the current in the coil is greater than a predetermined tripping current, the armature is displaced by the resulting magnetic field of the coil and triggers the circuit breaker via a plunger.
  • the trigger member ie armature and plunger must be held by a fetlock spring in a defined rest position to ensure a defined response of the circuit breaker and to avoid false triggering. Consequently, the magnet system must contain a plurality of different mechanical parts to ensure this reliability. To assemble this plurality of mechanical parts is time consuming and consequently expensive. For compliance with a predetermined triggering behavior, it is also significant that the air gap of the magnetic circuit of the magnet system is as independent of tolerances in manufacturing adjustable, which is why known magnetic systems sometimes quite expensive design measures provide for this.
  • two bearing members are formed at a fixed distance from each other on the inside of the insulating material, wherein a first bearing member for holding the conductor piece and the second bearing member are designed as a stop for the armature, two spaced apart the thickness of the conductor piece side by side integrally formed on the inside of the housing webs together form the first bearing member, and wherein the air gap of the magnet system determining distance between the magnetic core and the armature by the distance between the two bearing members can be fixed.
  • An inventive circuit breaker has with respect to the magnet system very few items that partially take multiple functions, this is very easy to assemble, even fully automatically at high speed.
  • the magnetic core in addition to its actual function as a magnetic core in the magnetic circuit of the magnet system still fulfills the function of a holding member for the sleeve.
  • a separate support device for the magnet system is not required, since the magnetic core is attached to the conductor piece, and the conductor piece, since it carries the fixed contact piece, must be held in the housing of the service switching device anyway.
  • the magnet system is held on the holder of the conductor piece with the fixed contact when mounted in the housing, the sleeve is held over the magnetic core, and the armature is held in the sleeve.
  • a rearward stop for the armature can be provided outside the magnet system, as the armature is insertable and executable into the sleeve at the second end of the sleeve. Therefore, the magnet system of the circuit breaker according to the invention is suitable for determining the distance between the magnet core and the magnet armature which determines the air gap of the magnet system by stop means located outside the magnet system and thus can be adjusted independently of manufacturing tolerances of the magnet system.
  • two bearing members are formed at a fixed distance from each other on the inside of the insulating material, wherein a first bearing member for holding the conductor piece and the second bearing member are formed as a stop for the armature.
  • the first bearing member may be formed, for example, by two spaced apart the thickness of the conductor piece side by side on the inside of the housing webs, between which the conductor piece is clamped for attachment.
  • the second bearing member may be a shoulder on the inside of the housing, which serves as a stop for the armature, that is, the armature can not stand in the rest of the fetlock spring up to this stop be pushed out of the sleeve.
  • the distance between the magnetic core and the armature determining the air gap of the magnet system can be determined by the distance between the two bearing members.
  • the air gap of the magnetic circuit, so the distance between the magnetic core and the armature, is thus determined via two contact points in the housing. These bearing points can be kept in the housing exactly to each other, which has the consequence that according to the invention the air gap is tolerance independent.
  • the magnetic core has a penetrated by the plunger bore.
  • This hole also acts as a guide member for the plunger, so that an independent guide member, as required in the prior art, is eliminated.
  • the bore is a stepped longitudinal bore with a larger diameter at the end facing away from the conductor piece end, and the diameter step forms a first stop for the fetlock spring.
  • the outer surface of the magnetic core at least in the region of engagement with the sleeve, has a surface configuration which increases the friction between the magnetic core and the sleeve in this region.
  • This can be done for example by an external circumferential structuring of the outer surface, such as a kind of corrugation or roughening over which the sleeve is pushed and thereby better holds, without a further fastening means, such as an adhesive layer, must be provided.
  • the plunger is inserted into a blind hole-like depression on an end face of the armature and secured therein. This can be realized for example by the fact that the plunger is pressed into the armature. This has the advantageous effect of an optimized, better return of the armature.
  • Such a invention to be provided Measure has a particularly favorable effect on the tolerances in the flow.
  • the end face of the magnet armature forms the second stop for the fetlock spring.
  • it advantageously has no contouring, that is to say in particular no hole or milled recess, in order to receive the fetlock spring.
  • the restraining spring lies against the smooth end face. This has the beneficial effect of undisturbed and thus further improved magnetic properties of the magnetic circuit of the magnet system, which in particular a higher armature force is effected.
  • the magnetic core is riveted to the conductor piece.
  • FIG. 1 shows a magnet system 1, as constructed according to the invention and in a circuit breaker 2, see Fig. 2 and 3 , is used. Further details and other components of a circuit breaker, which are usually present in such, such as rear derailleur, overcurrent release, arc quenching device with arc guide rails and arc splitter stack and so on are not shown here.
  • the magnet system 1 has a yoke 3, here an L-shaped metal yoke, with a long leg 21 and an approximately right angle bent thereon short leg 22nd
  • a conductor piece 10 is welded flat.
  • the conductor piece 10 carries a fixed contact piece 11 and extends in the extension of the short leg 22 downwards, where it ends in an approximately U-shaped curvature, which forms a Fest.leitschiene.
  • the conductor piece 10 is formed with a first plate 23 which is welded directly to the short leg 22. At the first plate 23 is projecting at an angle of approximately 45 ° projecting a second plate 24, which thus extends obliquely downwards. To the second plate 24, the U-shaped curvature 25 is formed.
  • FIG. 2 is schematically shown a contact lever 27 with a movable contact piece 28 which forms the contact point of the circuit breaker 2 with the fixed contact piece 11 and from which a movable strand 29 emanates, which continues the current path in the circuit breaker inside.
  • the short leg 22 and the conductor piece 10 each have a bore which lie one above the other in welded state and thus form a common passage through the conductor piece 10 and the short leg 22.
  • the magnetic core consists of a ferromagnetic material and has a cylindrical outer contour and a stepped longitudinal bore 14. The larger diameter is located on the side facing away from the conductor piece 10 side, the smaller diameter is located on the conductor piece 10 side facing.
  • the diameter step 15 forms a stop for a cylinder spring 9, which acts as a restraining spring.
  • the restraint spring 9 is inserted from the side of the larger diameter ago in the longitudinal bore 14 until it comes to the stop at the diameter stage 15.
  • a coil tube, also referred to as sleeve 5, made of insulating plastic material is pushed from the outside over the outer surface of the magnetic core 6.
  • the outer surface of the magnetic core 6 has a surface contouring, such as a corrugation, which the frictional force between the outer surface of the magnetic core 6 and the inner surface of the Sleeve 5 increases.
  • the sleeve is pushed with a certain interference fit on the outer surface of the magnetic core 6, supported by the surface contouring and thereby increased sliding and static friction holds the sleeve 5 then on its own on the magnetic core 6, there is no further operation for securing the sleeve fifth on the magnetic core 6 of need.
  • the coil 4 is pushed, which is traversed by the current flowing through the circuit breaker current.
  • this coil can have more or fewer turns with different cross-sections. In the example shown here, the coil has only 3 turns and a large, rectangular cross-section. It is thus suitable for switching off a large short-circuit current.
  • the coil 4 is connected via a first connection conductor 26 to the second plate 24 of the conductor piece 10. Both are welded directly to each other, resulting in a low contact resistance and an overall low electrical resistance of the current path.
  • the first connection conductor 26 also forms an angle of approximately 45 ° with the first plate 23.
  • This oblique course of the connecting conductor 26 and the second plate 24 has the following advantage.
  • the magnetic field associated with this looping action acts on the arc to propel it away from the pad and toward the baffles and arc splitter stack (not shown in the figures herein); It is also said that the arc is blown away, and the configuration of first terminal conductor 26, second plate 24 and movable contact lever 27 with strand is also referred to as Blasschleife. Due to the oblique course of the second plate 24 and the first connecting conductor 26, the blown loop here has a wide opening, it creates a large Blasschleife, which is advantageous in terms of a strong Blasooth.
  • connection conductor 33 At the other end of the coil 4 is a second connection conductor 33, which is connected to a connection terminal 34.
  • the magnet armature 8 has a cylindrical shape, with an outer diameter, which is dimensioned so that it can easily slide along with its outer surface on the inner surface of the sleeve 5, without forming a too large air gap.
  • the end face of the magnet armature 8 has no further surface contour.
  • the end face thus represents in the embodiment according to the invention a smooth surface. This is advantageous because it results in a higher anchor force. Because decisive for the height of the magnetic force, the anchor force, the area in the region of the air gap and the air gap width.
  • the inventive design results in a large anchor surface in the region of the air gap and thus in a large anchor force.
  • the restraint spring 9 is pushed over the pressed into the armature 8 plunger 7. From the open side of the sleeve 5 ago then the armature, with the plunger 7 ahead, inserted into the sleeve 5. The smaller diameter is just so large that the plunger 7, which is connected to the armature 8, can slide therethrough. The plunger 7 thus slides through the bore 17 until it looks out at the opening in the conductor piece 10 a piece. The restraint spring reaches the diameter step.
  • the armature 8 looks at the free end of the sleeve 5 a little way beyond the sleeve 5 addition.
  • the width of the air gap of the magnetic circuit of the magnetic system 1 can be fixed by the distance of the end face of the armature 8 of the magnetic core 6.
  • the plunger is driven to the left out of the sleeve and can open the contact lever to open the contact point.
  • the magnet system 1 is inserted into the circuit breaker 2, and thereby the conductor piece 10 between two spaced apart the thickness of the conductor piece side by side on the inside of the housing molded webs 34, 35th , which together form a first bearing member 18, introduced and held, while a paragraph 19, also referred to as a second bearing member 19, serves as a stop for the magnet armature 8 on the inside of the housing.
  • the width of the air gap is thus determined by the distance between two bearing members 18, 19 or contact points in the housing, not by parts of the magnet system itself.
  • the contact points 18, 19 connected to the housing can be adjusted to each other by precise housing production in an exact position and maintained with high reproducibility be, whereby the air gap is independent of manufacturing tolerances of the magnet system.
  • the magnet system according to the invention is very simple and easy to assemble.
  • the magnet system is built up step by step on the yoke. First, the magnetic core is riveted to the yoke. The sleeve is pushed onto the magnetic core, the magnet armature with the plunger are pushed into the sleeve, the coil we pushed over it, all together is inserted into the housing. It is not necessary to produce complicated assembled subassemblies and then assemble them.
  • the critical parameter of the air gap width is adjustable by a housing size, namely the set outside the magnet system distance between the two contact points for the conductor piece on the one hand and the armature on the other hand, with low tolerance.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Electromagnets (AREA)
  • Breakers (AREA)

Description

Die Erfindung geht aus von einem Leitungsschutzschalter mit einem Isolierstoffgehäuse und mit einem Magnetsystem mit einem Joch, einer Spule, einer Hülse, einem Magnetkern, einem Stößel, einem Magnetanker und einer Fesselfeder, wobei an dem Joch ein Leiterstück ausgebildet ist, das ein Festkontaktstück trägt, und wobei der Magnetanker in der Hülse gegen die Kraft der Fesselfeder verschieblich geführt ist, wobei der Magnetkern an dem Leiterstück befestigt ist, wobei die Hülse an ihrem ersten Ende mit dem Magnetkern in Eingriff ist, und wobei der Magnetanker an dem zweiten Ende der Hülse in die Hülse ein- und ausführbar ist, gemäß dem Oberbegriff des Anspruchs 1.The invention relates to a circuit breaker with an insulating material housing and with a magnet system having a yoke, a coil, a sleeve, a magnetic core, a plunger, a magnet armature and a restraint spring, wherein on the yoke, a conductor piece is formed, which carries a fixed contact piece, and wherein the magnet armature is slidably guided in the sleeve against the force of the fetlock spring, the magnet core being fixed to the conductor piece, the sleeve engaging the magnet core at its first end, and the magnet armature engaging the second end of the sleeve the sleeve is on and executable, according to the preamble of claim 1.

Die Erfindung betrifft weiter ein Verfahren zum Herstellen eines solchen Leitungsschutzschalters.The invention further relates to a method for producing such a circuit breaker.

Ein Magnetsystem für einen Leitungsschutzschalter ist beispielweise in der DE 198 45 476 A1 gezeigt.A magnet system for a circuit breaker is for example in the DE 198 45 476 A1 shown.

Die DE 85 27 361 U1 zeigt ein elektromagnetisch betätigtes Kurzschlussauslöseorgan zum Einbau in einen mit einer Lichtbogenlöschvorrichtung versehenen Leitungsschutzschalter mit einer Regelspule, darin liegendem Magnetkern, und einem Schlagbolzen. Die Erregerspule ist von einem Magnetjoch rahmenförmig umschlossen. Die Lichtbogenlöschvorrichtung ist neben dem Kurzschlussauslöseorgan angeordnet und ist im Wesentlichen aus einem Löschblechpaket und zwei parallel verlaufenden, dieses flankierenden Lichtbogenleitblechen aufgebaut. Der löschblechseitige Schenkel des Magnetjoches ist vom magnetseitigen Lichtbogenleitblech gebildet.The DE 85 27 361 U1 shows an electromagnetically actuated short-circuit release member for installation in a provided with an arc extinguishing device circuit breaker with a control coil, lying therein magnetic core, and a firing pin. The excitation coil is surrounded by a magnetic yoke frame-shaped. The arc extinguishing device is arranged next to the short-circuit release member and is essentially composed of a splitter stack and two parallel, this flanking arc guide. The sheet-metal-side leg of the magnetic yoke is formed by the magnet-side arc guide plate.

Die DE 36 19 239 A1 zeigt einen magnetischen Schnellauslöser für Leitungsschutzschalter, bei dem das Magnetjoch aus einem etwa U-förmig gebogenen bügelförmigen Magnetwinkel mit Bodenteil und davon aufragenden Schenkeln und einem stirnseitigen Abschlussblech mit dem davon einstückig abgewinkelten Kontaktstück besteht. Außerdem ist aus dem Bodenteil des Magnetwinkels eine Haltekralle seitlich herausgebogen, die die Ausnehmung für den Magnetanker von außen her übergreift und die Baugruppe von Magnetanker, Auslösestößel und Rückstellfeder bei der Montage am Magnetjoch zusammenhält. Der Schnellauslöser bildet so eine leicht zu handhabende vormontierte Baugruppe, die zwischen yom Schaltergehäuse nach innen ragenden Stützzapfen oder Stütznasen eingeschoben und auf diese Weise im Schaltergehäuse festgelegt werden kann, wobei durch einen entsprechenden Widerlagersteg für den Magnetanker am Schaltergehäuse sichergestellt ist, dass nach der Montage des Schnellauslösers zwischen dem Magnetanker und der Haltekralle ein Luftspalt vorhanden ist, um auf diese Weise den magnetischen Fluss bei der Auslösung des Schalters sicherzustellen.The DE 36 19 239 A1 shows a magnetic quick release for circuit breaker, wherein the magnetic yoke of an approximately U-shaped bow-shaped magnetic angle with bottom part and upstanding legs and a front side End plate with the one piece angled contact piece consists. In addition, a retaining claw is bent laterally from the bottom part of the magnetic angle, which engages over the recess for the magnet armature from the outside and holds together the assembly of armature, trip rod and return spring during assembly on the magnetic yoke. The quick release thus forms an easy-to-use pre-assembled assembly which can be inserted between the switch housing inwardly projecting support pin or support lugs and fixed in this manner in the switch housing, being ensured by a corresponding abutment web for the armature on the switch housing, that after assembly of the Quick release between the armature and the retaining claw an air gap is present to ensure in this way the magnetic flux when the switch is triggered.

Die US 6 577 217 B1 zeigt eine Magnetunteranordnung für ein modulares elektrisches Gerät des Schaltkreis-Unterbrechertyps. Ein Joch mit einem Schenkel ist zumindest teilweise innerhalb des Innenvolumens einer Induktionsspule integriert, so dass ein Bereich der axialen Abmessungen der Spule durch das Joch erlaubt ist. Ein Ende der Spule ist so orientiert, dass seine Befestigung an einem feststehenden Kontakt auch den Bereich der axialen Abmessungen ermöglicht.The US Pat. No. 6,577,217 B1 shows a magnet subassembly for a modular electrical device of the circuit breaker type. A yoke with a leg is at least partially integrated within the internal volume of an induction coil so that a range of the axial dimensions of the coil is allowed through the yoke. One end of the coil is oriented so that its attachment to a fixed contact also allows the range of axial dimensions.

Die US 2010/026430 A1 zeigt ein Schaltgerät, mit einer magnetischen Auslöseanordnung, wobei die magnetische Auslöseanordnung wenigstens einen Anker, eine Spule, ein Joch und eine Jochhülse aufweist, wobei der Anker und die Jochhülse im Wesentlichen fluchtend angeordnet sind, wobei die Spule im Wesentlichen um den Anker und/oder die Jochhülse herum angeordnet ist, wobei das Joch um die Spule herum angeordnet ist, und wobei der Anker zum wenigstens mittelbaren Auslösen einer Trennvorrichtung des Schaltgeräts vorgesehen ist. Es wird zur Senkung des Fertigungs-, Energie- und Rohstoffaufwands zur Herstellung des Schaltgeräts vorgeschlagen, dass die Jochhülse durch wenigstens einen ersten Biegeteil gebildet ist.The US 2010/026430 A1 shows a switching device, with a magnetic trip device, wherein the magnetic trip device comprises at least one armature, a coil, a yoke and a yoke sleeve, wherein the armature and the yoke sleeve are arranged substantially in alignment, wherein the coil substantially around the armature and / or the yoke sleeve is arranged around, wherein the yoke is arranged around the coil, and wherein the armature is provided for at least indirectly triggering a separation device of the switching device. It is proposed to reduce the production, energy and raw materials expenditure for the production of the switching device, that the yoke sleeve is formed by at least one first bent part.

Leitungsschutzschalter mit Magnetsystemen werden in der Elektrotechnik zum Schutz von Schaltkreisen gegen Überlastung, z. B. durch Kurzschlüsse oder dergleichen, verwendet und dienen zur automatischen Unterbrechung einer Leitung, d. h., sie lösen aus, wenn eine solche Überlastung auftritt. Für einige mögliche Überlastungsfälle wird ein Magnetsystem zur Auslösung des Leitungsschutzschalters verwendet. Das Magnetsystem hat einen beweglichen Anker, der in Ruhelage teilweise in eine von dem Strom in der zu überwachenden Leitung fließenden stromdurchflossene Spule hineinragt. Wird der Strom in der Spule größer als ein vorbestimmter Auslösestrom, wird der Anker durch das entstehende Magnetfeld der Spule verschoben und löst über einen Stößel den Leitungsschutzschalter aus. Weil die Spule stets von dem zu überwachenden Strom durchflossen ist, muss das Auslöseglied, d. h. Anker und Stößel, von einer Fesselfeder in einer definierten Ruhelage gehalten sein, um ein definiertes Ansprechen des Leitungsschutzschalters sicherzustellen und Fehlauslösungen zu vermeiden. Folglich muss das Magnetsystem eine Mehrzahl verschiedener mechanischer Teile enthalten, um diese Funktionssicherheit zu gewährleisten. Diese Mehrzahl mechanischer Teile zusammenzufügen ist zeitaufwendig und folglich teuer. Für die Einhaltung eines vorgebbaren Auslöseverhaltens ist es auch bedeutsam, dass der Luftspalt des Magnetkreises des Magnetsystems möglichst toleranzunabhängig bei der Fertigung einstellbar ist, weshalb bekannte Magnetsysteme teils recht aufwändige konstruktive Maßnahmen hierfür vorsehen.Circuit breakers with magnetic systems are used in electrical engineering to protect circuits against overload, z. As by short circuits or the like, and are used to automatically disconnect a line, ie, they trigger when such overload occurs. For some possible overload cases a magnet system is used to trip the circuit breaker. The magnet system has a movable armature, which in the rest position partially protrudes into a current-carrying coil flowing from the current in the line to be monitored. If the current in the coil is greater than a predetermined tripping current, the armature is displaced by the resulting magnetic field of the coil and triggers the circuit breaker via a plunger. Since the coil is always traversed by the current to be monitored, the trigger member, ie armature and plunger must be held by a fetlock spring in a defined rest position to ensure a defined response of the circuit breaker and to avoid false triggering. Consequently, the magnet system must contain a plurality of different mechanical parts to ensure this reliability. To assemble this plurality of mechanical parts is time consuming and consequently expensive. For compliance with a predetermined triggering behavior, it is also significant that the air gap of the magnetic circuit of the magnet system is as independent of tolerances in manufacturing adjustable, which is why known magnetic systems sometimes quite expensive design measures provide for this.

Es ist daher die Aufgabe der vorliegenden Erfindung, einen Leitungsschutzschalter mit einem Magnetsystem so weiterzubilden, dass sein Aufbau weniger Teile erfordert und die Montage des Magnetsystems in dem Leitungsschutzschalter weiter vereinfacht und auch der Luftspalt des Magnetkreises des Magnetsystems toleranzunabhängiger wird, sowie ein Verfahren zu dessen Herstellung anzugeben.It is therefore an object of the present invention to develop a circuit breaker with a magnetic system so that its structure requires fewer parts and further simplifies the assembly of the magnet system in the circuit breaker and the air gap of the magnetic circuit of the magnet system is tolerance independent, and a method for its preparation specify.

Die Aufgabe wird bezüglich des Leitungsschutzschalters gelöst durch einen Leitungsschutzschalter mit den Merkmalen des Anspruchs 1.The object is achieved with respect to the circuit breaker by a circuit breaker with the features of claim 1.

Bezüglich des Verfahrens zur Herstellung eines Leitungsschutzschalters wird die Aufgabe gelöst durch Anspruch 8.With regard to the method for producing a circuit breaker, the object is achieved by claim 8.

Erfindungsgemäß also sind an der Innenseite des Isolierstoffgehäuses zwei Lagerorgane in festgelegtem Abstand zueinander ausgebildet, wobei ein erstes Lagerorgan zum Halten des Leiterstücks und das zweite Lagerorgan als Anschlag für den Magnetanker ausgebildet sind, wobei zwei im Abstand der Dicke des Leiterstückes nebeneinander an der Innenseite des Gehäuses angeformte Stege zusammen das erste Lagerorgan bilden, und wobei der den Luftspalt des Magnetsystems bestimmende Abstand zwischen dem Magnetkern und dem Magnetanker durch den Abstand zwischen den beiden Lagerorganen festlegbar ist.According to the invention, two bearing members are formed at a fixed distance from each other on the inside of the insulating material, wherein a first bearing member for holding the conductor piece and the second bearing member are designed as a stop for the armature, two spaced apart the thickness of the conductor piece side by side integrally formed on the inside of the housing webs together form the first bearing member, and wherein the air gap of the magnet system determining distance between the magnetic core and the armature by the distance between the two bearing members can be fixed.

Ein erfindungsgemäßer Leitungsschutzschalter hat bezüglich des Magnetsystems sehr wenige Einzelteile, die teilweise Mehrfachfunktionen übernehmen, ist dadurch sehr einfach zu montieren, auch vollautomatisch in hoher Geschwindigkeit. So erfüllt der Magnetkern zusätzlich zu seiner eigentlichen Funktion als Magnetkern im Magnetkreis des Magnetsystems noch die Funktion eines Halteorgans für die Hülse. Eine gesonderte Halterungsvorrichtung für das Magnetsystem ist nicht erforderlich, da der Magnetkern an dem Leiterstück befestigt ist, und das Leiterstück, da es das Festkontaktstück trägt, ohnehin im Gehäuse des Installationsschaltgerätes festgehalten sein muss. Somit ist das Magnetsystem über die Halterung des Leiterstücks mit dem Festkontakt bei Montage im Gehäuse gehalten, die Hülse ist über den Magnetkern gehalten, und der Magnetanker ist in der Hülse gehalten. Ein rückwärtiger Anschlag für den Magnetanker kann, da der Magnetanker an dem zweiten Ende der Hülse in die Hülse ein- und ausführbar ist, außerhalb des Magnetsystems vorgesehen sein. Daher ist das Magnetsystem des erfindungsgemäßen Leitungsschutzschalters dazu geeignet, dass der den Luftspalt des Magnetsystems bestimmende Abstand zwischen dem Magnetkern und dem Magnetanker durch außerhalb des Magnetsystems befindliche Anschlagsmittel bestimmt und damit unabhängiger von Fertigungstoleranzen des Magnetsystems einstellbar ist.An inventive circuit breaker has with respect to the magnet system very few items that partially take multiple functions, this is very easy to assemble, even fully automatically at high speed. Thus, the magnetic core in addition to its actual function as a magnetic core in the magnetic circuit of the magnet system still fulfills the function of a holding member for the sleeve. A separate support device for the magnet system is not required, since the magnetic core is attached to the conductor piece, and the conductor piece, since it carries the fixed contact piece, must be held in the housing of the service switching device anyway. Thus, the magnet system is held on the holder of the conductor piece with the fixed contact when mounted in the housing, the sleeve is held over the magnetic core, and the armature is held in the sleeve. A rearward stop for the armature can be provided outside the magnet system, as the armature is insertable and executable into the sleeve at the second end of the sleeve. Therefore, the magnet system of the circuit breaker according to the invention is suitable for determining the distance between the magnet core and the magnet armature which determines the air gap of the magnet system by stop means located outside the magnet system and thus can be adjusted independently of manufacturing tolerances of the magnet system.

Erfindungsgemäß sind dazu an der Innenseite des Isolierstoffgehäuses zwei Lagerorgane in festgelegtem Abstand zueinander ausgebildet, wobei ein erstes Lagerorgan zum Halten des Leiterstücks und das zweite Lagerorgan als Anschlag für den Magnetanker ausgebildet sind. Das erste Lagerorgan kann beispielsweise durch zwei im Abstand der Dicke des Leiterstücks nebeneinander an der Gehäuseinnenseite angeformte Stege gebildet sein, zwischen denen das Leiterstück zur Befestigung festgeklemmt wird. Das zweite Lagerorgan kann ein Absatz an der Innenseite des Gehäuses sein, das als Anschlag für den Magnetanker dient, d.h., der Magnetanker kann im Ruhezustand von der Fesselfeder nicht weiter als bis zu diesem Anschlag aus der Hülse heraus gedrückt werden.According to the invention, two bearing members are formed at a fixed distance from each other on the inside of the insulating material, wherein a first bearing member for holding the conductor piece and the second bearing member are formed as a stop for the armature. The first bearing member may be formed, for example, by two spaced apart the thickness of the conductor piece side by side on the inside of the housing webs, between which the conductor piece is clamped for attachment. The second bearing member may be a shoulder on the inside of the housing, which serves as a stop for the armature, that is, the armature can not stand in the rest of the fetlock spring up to this stop be pushed out of the sleeve.

Der den Luftspalt des Magnetsystems bestimmende Abstand zwischen dem Magnetkern und dem Magnetanker ist durch den Abstand zwischen den beiden Lagerorganen festlegbar. Der Luftspalt des Magnetkreises, also der Abstand zwischen dem Magnetkern und dem Magnetanker, wird somit über zwei Anlagepunkte im Gehäuse bestimmt. Diese Anlagepunkte können im Gehäuse genau zueinander gehalten werden, was zur Folge hat, dass erfindungsgemäß der Luftspalt toleranzunabhängiger ist.The distance between the magnetic core and the armature determining the air gap of the magnet system can be determined by the distance between the two bearing members. The air gap of the magnetic circuit, so the distance between the magnetic core and the armature, is thus determined via two contact points in the housing. These bearing points can be kept in the housing exactly to each other, which has the consequence that according to the invention the air gap is tolerance independent.

Gemäß einer vorteilhaften Ausführungsform der Erfindung hat der Magnetkern eine von dem Stößel durchgriffene Bohrung. Diese Bohrung wirkt gleichzeitig als Führungsorgan für den Stößel, so dass ein eigenständiges Führungsorgan, wie es im Stand der Technik erforderlich ist, entfällt.According to an advantageous embodiment of the invention, the magnetic core has a penetrated by the plunger bore. This hole also acts as a guide member for the plunger, so that an independent guide member, as required in the prior art, is eliminated.

Gemäß einer vorteilhaften Ausführungsform der Erfindung ist die Bohrung eine gestufte Längsbohrung mit einem größeren Durchmesser an dem von dem Leiterstück abgewandten Ende, und die Durchmesserstufe bildet einen ersten Anschlag für die Fesselfeder. Dadurch ist die Fesselfeder verdrehsicher gelagert, ein zusätzliches Halteteil für die Fesselfeder ist nicht erforderlich.According to an advantageous embodiment of the invention, the bore is a stepped longitudinal bore with a larger diameter at the end facing away from the conductor piece end, and the diameter step forms a first stop for the fetlock spring. As a result, the restraint spring is mounted against rotation, an additional holding part for the restraint spring is not required.

Gemäß einer vorteilhaften Ausführungsform der Erfindung weist die äußere Oberfläche des Magnetkerns wenigstens im Bereich des Eingriffs mit der Hülse eine die Reibung zwischen dem Magnetkern und der Hülse in diesem Bereich erhöhende Oberflächenkonfiguration auf. Diese kann beispielsweise durch eine außenliegende umlaufende Strukturierung der äußeren Oberfläche, etwa eine Art Riffelung oder Aufrauhung erfolgen, über die die Hülse geschoben wird und dadurch besser hält, ohne dass ein weiteres Befestigungsmittel, wie beispielsweise eine Kleberschicht, vorgesehen werden muss.According to an advantageous embodiment of the invention, the outer surface of the magnetic core, at least in the region of engagement with the sleeve, has a surface configuration which increases the friction between the magnetic core and the sleeve in this region. This can be done for example by an external circumferential structuring of the outer surface, such as a kind of corrugation or roughening over which the sleeve is pushed and thereby better holds, without a further fastening means, such as an adhesive layer, must be provided.

Gemäß einer vorteilhaften Ausführungsform der Erfindung ist der Stößel in eine sacklochartige Vertiefung an einer Stirnseite des Magnetankers eingefügt und darin befestigt. Dies kann beispielsweise dadurch realisiert sein dass der Stößel in dem Magnetanker eingepresst ist. Das hat die vorteilhafte Wirkung einer optimierten, besseren Rückführung des Magnetankers. Eine solche erfindungsgemäß vorzusehende Maßnahme wirkt sich insbesondere günstig auf die Toleranzen beim Vorlauf aus.According to an advantageous embodiment of the invention, the plunger is inserted into a blind hole-like depression on an end face of the armature and secured therein. This can be realized for example by the fact that the plunger is pressed into the armature. This has the advantageous effect of an optimized, better return of the armature. Such a invention to be provided Measure has a particularly favorable effect on the tolerances in the flow.

Gemäß einer vorteilhaften Ausführungsform der Erfindung bildet die Stirnseite des Magnetankers den zweiten Anschlag für die Fesselfeder. Sie weist dazu vorteilhafterweise keine Konturierung, also insbesondere keine Bohrung oder Einfräsung, auf, um die Fesselfeder aufzunehmen. In vorteilhafter Weise liegt die Fesselfeder an der glatten Stirnseite an. Das hat die vorteilhafte Wirkung ungestörter und damit weiter verbesserter magnetischer Eigenschaften des Magnetkreises des Magnetsystems, wodurch insbesondere eine höhere Ankerkraft bewirkt ist.According to an advantageous embodiment of the invention, the end face of the magnet armature forms the second stop for the fetlock spring. For this purpose, it advantageously has no contouring, that is to say in particular no hole or milled recess, in order to receive the fetlock spring. Advantageously, the restraining spring lies against the smooth end face. This has the beneficial effect of undisturbed and thus further improved magnetic properties of the magnetic circuit of the magnet system, which in particular a higher armature force is effected.

Gemäß einer vorteilhaften Ausführungsform der Erfindung ist der Magnetkern mit dem Leiterstück vernietet.According to an advantageous embodiment of the invention, the magnetic core is riveted to the conductor piece.

Ein erfindungsgemäßes Verfahren zum Herstellen eines Magnetsystems ist dadurch gekennzeichnet, dass es folgende Schritte umfasst:

  • Ausbilden zweier Lagerorgane an der Innenseite des Isolierstoffgehäuses in festgelegtem Abstand zueinander, wobei das erste Lagerorgan durch zwei im Abstand der Dicke des Leiterstückes nebeneinander an der Innenseite des Gehäuses angeformte Stege zusammen gebildet wird,
  • Befestigen des Magnetkerns an dem Leiterstück,
  • Aufschieben der Hülse auf den Magnetkern,
  • Aufschieben der Fesselfeder auf den an dem Magnetanker ausgebildeten Stößel,
  • Einschieben des Magnetankers mit dem daran ausgebildeten Stößel und der darauf aufgeschobenen Fesselfeder in die Hülse,
  • Einsetzen der aus Magnetkern, Leiterstück, Hülse mit eingeschobenem Magnetkern gebildeten Einheit in das Gehäuse eines Installationsschaltgerätes.
A method according to the invention for producing a magnet system is characterized in that it comprises the following steps:
  • Forming two bearing members on the inside of the insulating material in a fixed distance from each other, wherein the first bearing member is formed by two spaced apart the thickness of the conductor piece side by side on the inside of the housing webs together,
  • Attaching the magnetic core to the conductor piece,
  • Sliding the sleeve onto the magnetic core,
  • Pushing the fetlock spring onto the tappet formed on the magnet armature,
  • Inserting the magnet armature with the tappet formed thereon and the restraining spring pushed thereon into the sleeve,
  • Insertion of the magnetic core, conductor piece, sleeve formed with inserted magnetic core unit into the housing of a service switching device.

Anhand der Zeichnungen, in denen ein Ausführungsbeispiel der Erfindung dargestellt ist, sollen die Erfindung sowie weitere vorteilhafte Ausgestaltungen und Verbesserungen der Erfindung näher erläutert und beschrieben werden.Reference to the drawings, in which an embodiment of the invention is shown, the invention and further advantageous refinements and improvements of the invention will be explained and described in detail.

Es zeigen:

Figur 1
eine Ausführungsform eines Magnetsystems zur Verwendung in einem erfindungsgemäßen Leitungsschutzschalter,
Figur 2
eine Ansicht eines in ein Gehäuse eines Leitungsschutzschalters eingesetzten Magnetsystems nach Fig. 1., sowie
Figur 3
eine geschnittene Ansicht des in ein Gehäuse eines Leitungsschutzschalters eingesetzten Magnetsystems nach Fig. 1.
Show it:
FIG. 1
an embodiment of a magnet system for use in a circuit breaker according to the invention,
FIG. 2
a view of a magnet system used in a housing of a circuit breaker according to Fig. 1 ., such as
FIG. 3
a sectional view of the magnet system used in a housing of a circuit breaker according to Fig. 1 ,

In den Figuren werden gleiche oder gleichwirkende Bauteile oder Elemente mit denselben Bezugszeichen bezeichnet.In the figures, identical or equivalent components or elements are designated by the same reference numerals.

Figur 1 zeigt ein Magnetsystem 1, wie es erfindungsgemäß aufgebaut und in einem Leitungsschutzschalter 2, siehe Fig. 2 und 3, eingesetzt wird. Weitere Einzelheiten und weitere Bauteile eines Leitungsschutzschalters, die üblicherweise in einem solchen vorhanden sind, wie beispielsweise Schaltwerk, Überstromauslöser, Lichtbogenlöscheinrichtung mit Lichtbogenleitschienen und Lichtbogenlöschblechpaket und so weiter sind hier nicht dargestellt. FIG. 1 shows a magnet system 1, as constructed according to the invention and in a circuit breaker 2, see Fig. 2 and 3 , is used. Further details and other components of a circuit breaker, which are usually present in such, such as rear derailleur, overcurrent release, arc quenching device with arc guide rails and arc splitter stack and so on are not shown here.

Das Magnetsystem 1 hat ein Joch 3, hier ein L-förmiges Metalljoch, mit einem langen Schenkel 21 und einem etwa rechtwinklig daran abgebogenen kurzen Schenkel 22.The magnet system 1 has a yoke 3, here an L-shaped metal yoke, with a long leg 21 and an approximately right angle bent thereon short leg 22nd

An dem kurzen Schenkel 22 ist ein Leiterstück 10 flächig angeschweißt. Das Leiterstück 10 trägt ein Festkontaktstück 11 und erstreckt sich in Verlängerung des kurzen Schenkels 22 nach unten hin, wo es in einer etwa U-förmigen Wölbung endet, welche eine Festkontaktleitschiene bildet. Das Leiterstück 10 ist dabei mit einer ersten Platte 23 ausgebildet, die direkt an dem kurzen Schenkel 22 angeschweißt ist. An die erste Platte 23 ist in einem Winkel von ungefähr 45° abstehend eine zweite Platte 24 angeformt, die somit schräg nach unten verläuft. An die zweite Platte 24 ist die U-förmige Wölbung 25 angeformt.On the short leg 22, a conductor piece 10 is welded flat. The conductor piece 10 carries a fixed contact piece 11 and extends in the extension of the short leg 22 downwards, where it ends in an approximately U-shaped curvature, which forms a Festkontaktleitschiene. The conductor piece 10 is formed with a first plate 23 which is welded directly to the short leg 22. At the first plate 23 is projecting at an angle of approximately 45 ° projecting a second plate 24, which thus extends obliquely downwards. To the second plate 24, the U-shaped curvature 25 is formed.

In Figur 2 ist schematisch noch ein Kontakthebel 27 mit einem beweglichen Kontaktstück 28 dargestellt, welches mit dem Festkontaktstück 11 die Kontaktstelle des Leitungsschutzschalters 2 bildet und von dem eine bewegliche Litze 29 ausgeht, die den Strompfad in den Leitungsschutzschalter hinein fortsetzt.In FIG. 2 is schematically shown a contact lever 27 with a movable contact piece 28 which forms the contact point of the circuit breaker 2 with the fixed contact piece 11 and from which a movable strand 29 emanates, which continues the current path in the circuit breaker inside.

Der kurze Schenkel 22 und das Leiterstück 10 haben jeweils eine Bohrung, die in aneinander geschweißtem Zustand übereinanderliegen und somit einen gemeinsamen Durchgang durch das Leiterstück 10 und den kurzen Schenkel 22 bilden.The short leg 22 and the conductor piece 10 each have a bore which lie one above the other in welded state and thus form a common passage through the conductor piece 10 and the short leg 22.

Durch diesen Durchgang ist das freie Ende eines Magnetkerns 6 durchgesteckt, so dass er an der äußeren Seite des Leiterstücks 10 dieses ein Stück weit überragt und an dieser Seite durch Umbördeln festgenietet wird.Through this passage, the free end of a magnetic core 6 is pushed through, so that it projects beyond the outer side of the conductor piece 10 this piece and riveted to this side by crimping.

Der Magnetkern besteht aus einem ferromagnetischen Material und besitzt eine zylinderförmige Außenkontur und eine gestufte Längsbohrung 14. Der größere Durchmesser befindet sich an der von dem Leiterstück 10 abgewandten Seite, der kleinere Durchmesser befindet sich an der dem Leiterstück 10 zugewandten Seite.The magnetic core consists of a ferromagnetic material and has a cylindrical outer contour and a stepped longitudinal bore 14. The larger diameter is located on the side facing away from the conductor piece 10 side, the smaller diameter is located on the conductor piece 10 side facing.

Die Durchmesserstufe 15 bildet einen Anschlag für eine Zylinderfeder 9, welche als Fesselfeder wirkt. Die Fesselfeder 9 wird von der Seite des größeren Durchmessers her in die Längsbohrung 14 eingesetzt, bis sie an der Durchmesserstufe 15 zum Anschlag kommt.The diameter step 15 forms a stop for a cylinder spring 9, which acts as a restraining spring. The restraint spring 9 is inserted from the side of the larger diameter ago in the longitudinal bore 14 until it comes to the stop at the diameter stage 15.

Ein Spulenrohr, auch als Hülse 5 bezeichnet, aus isolierendem Kunststoffmaterial ist von außen über die äußere Oberfläche des Magnetkerns 6 geschoben. Damit die Hülse 5 nicht wieder herunter gleiten kann, besitzt die äußere Oberfläche des Magnetkerns 6 eine Oberflächenkonturierung, beispielsweise eine Riffelung, welche die Reibungskraft zwischen der äußeren Oberfläche des Magnetkerns 6 und der inneren Oberfläche der Hülse 5 erhöht. Die Hülse wird mit einer gewissen Presspassung auf die äußere Oberfläche des Magnetkerns 6 aufgeschoben, unterstützt durch die Oberflächenkonturierung und die dadurch erhöhte Gleit- und Haftreibung hält die Hülse 5 dann von selbst auf dem Magnetkern 6, es ist kein weiterer Arbeitsschritt zum Befestigen der Hülse 5 an dem Magnetkern 6 von Nöten.A coil tube, also referred to as sleeve 5, made of insulating plastic material is pushed from the outside over the outer surface of the magnetic core 6. Thus, the sleeve 5 can not slide down again, the outer surface of the magnetic core 6 has a surface contouring, such as a corrugation, which the frictional force between the outer surface of the magnetic core 6 and the inner surface of the Sleeve 5 increases. The sleeve is pushed with a certain interference fit on the outer surface of the magnetic core 6, supported by the surface contouring and thereby increased sliding and static friction holds the sleeve 5 then on its own on the magnetic core 6, there is no further operation for securing the sleeve fifth on the magnetic core 6 of need.

Über die äußere Oberfläche der Hülse 5 wird die Spule 4 geschoben, die von dem durch den Leitungsschutzschalter fließenden Strom durchflossen ist. Je nach Größe des Nennstroms und des abzuschaltenden Kurzschlussstromes kann diese Spule mehr oder weniger Windungen mit unterschiedlichen Querschnitten haben. In dem hier gezeigten Beispiel hat die Spule nur 3 Windungen und einen großen, rechteckförmigen Querschnitt. Sie ist damit für die Abschaltung eines großen Kurzschlussstromes geeignet. Die Spule 4 ist über einen ersten Anschlussleiter 26 mit der zweiten Platte 24 des Leiterstücks 10 verbunden. Beide sind direkt miteinander verschweißt, damit ergibt sich ein geringer Übergangswiderstand und ein insgesamt geringer elektrischer Widerstand des Strompfades.Over the outer surface of the sleeve 5, the coil 4 is pushed, which is traversed by the current flowing through the circuit breaker current. Depending on the size of the rated current and the short-circuit current to be disconnected, this coil can have more or fewer turns with different cross-sections. In the example shown here, the coil has only 3 turns and a large, rectangular cross-section. It is thus suitable for switching off a large short-circuit current. The coil 4 is connected via a first connection conductor 26 to the second plate 24 of the conductor piece 10. Both are welded directly to each other, resulting in a low contact resistance and an overall low electrical resistance of the current path.

Der erste Anschlussleiter 26 bildet ebenfalls einen Winkel von etwa 45° mit der ersten Platte 23. Dieser schräge Verlauf des Anschlussleiters 26 und der zweiten Platte 24 hat folgenden Vorteil. Bei Öffnung der Kontaktstelle im Kurzschlussfall entsteht zwischen dem Festkontaktstück 11 und dem beweglichen Kontaktstück 28 ein Lichtbogen, der den Strom zunächst noch weiter über die Kontaktstelle trägt. Die strichlierten Linien 30, 31 und der gebogene Pfeil 32 in Figur 2 veranschaulichen, dass der Strompfad über den Lichtbogen in diesem Zustand einen bogen- oder schleifenförmigen Verlauf nimmt. Das Magnetfeld, das mit diesem schleifenförmigen Verlauf einhergeht, wirkt so auf den Lichtbogen, dass es diesen von der Kontaktstelle weg und hin zu den Leitblechen und dem Lichtbogenlöschblechpaket (nicht in den Figuren hier dargestellt) treibt; man spricht auch davon, dass der Lichtbogen weggeblasen wird, und die Konfiguration aus erstem Anschlussleiter 26, zweiter Platte 24 und beweglichem Kontakthebel 27 mit Litze bezeichnet man auch als Blasschleife. Aufgrund des schrägen Verlaufs der zweiten Platte 24 und des ersten Anschlussleiters 26 hat die Blasschleife hier eine weite Öffnung, es entsteht eine große Blasschleife, was vorteilhaft im Sinne einer starken Blaswirkung ist.The first connection conductor 26 also forms an angle of approximately 45 ° with the first plate 23. This oblique course of the connecting conductor 26 and the second plate 24 has the following advantage. When opening the contact point in the event of a short circuit between the fixed contact piece 11 and the movable contact piece 28, an arc that initially carries the current even further over the contact point. The dashed lines 30, 31 and the curved arrow 32 in FIG. 2 illustrate that the current path over the arc in this state takes a curved or looped course. The magnetic field associated with this looping action acts on the arc to propel it away from the pad and toward the baffles and arc splitter stack (not shown in the figures herein); It is also said that the arc is blown away, and the configuration of first terminal conductor 26, second plate 24 and movable contact lever 27 with strand is also referred to as Blasschleife. Due to the oblique course of the second plate 24 and the first connecting conductor 26, the blown loop here has a wide opening, it creates a large Blasschleife, which is advantageous in terms of a strong Blaswirkung.

An dem anderen Ende der Spule 4 befindet sich ein zweiter Anschlussleiter 33, der mit einer Anschlussklemme 34 verbunden ist.At the other end of the coil 4 is a second connection conductor 33, which is connected to a connection terminal 34.

Der Magnetanker 8 hat eine zylinderförmige Gestalt, mit einem Außendurchmesser, der so bemessen ist, dass er mit seiner äußeren Oberfläche an der inneren Oberfläche der Hülse 5 leicht entlang gleiten kann, ohne eine allzu großen Luftspalt zu bilden.The magnet armature 8 has a cylindrical shape, with an outer diameter, which is dimensioned so that it can easily slide along with its outer surface on the inner surface of the sleeve 5, without forming a too large air gap.

An einer Stirnseite 17 hat der Magnetanker 8 eine sacklochartige Vertiefung, in die ein Stößel 7, etwa in Form eines runden Stiftes oder einer runden Stange ausgebildet, eingepresst wird und dann darin fest hält, ohne dass weitere Maßnahmen zur Befestigung, wie etwa schweißen, kleben oder ähnliches, vorgesehen zu werden brauchen.On an end face 17 of the magnet armature 8 has a blind hole-like depression into which a plunger 7, formed approximately in the form of a round pin or a round bar, is pressed and then held therein without further measures for attachment, such as welding, stick or the like, need to be provided.

Abgesehen von dem Sackloch zum Einpressen des Stößels 7 hat die Stirnseite des Magnetankers 8 keine weitere Oberflächenkontur. Die Stirnseite stellt somit in der erfindungsgemäßen Ausführung eine glatte Fläche dar. Dies ist von Vorteil, denn es resultiert in einer höheren Ankerkraft. Denn entscheidend für die Höhe der magnetischen Kraft, der Ankerkraft, ist die Fläche im Bereich des Luftspaltes und die Luftspaltbreite. Die erfindungsgemäße Ausführung resultiert in einer großen Ankerfläche im Bereich des Luftspaltes und damit in einer großen Ankerkraft.Apart from the blind hole for pressing in the plunger 7, the end face of the magnet armature 8 has no further surface contour. The end face thus represents in the embodiment according to the invention a smooth surface. This is advantageous because it results in a higher anchor force. Because decisive for the height of the magnetic force, the anchor force, the area in the region of the air gap and the air gap width. The inventive design results in a large anchor surface in the region of the air gap and thus in a large anchor force.

Die Fesselfeder 9 wird über den in den Magnetanker 8 eingepressten Stößel 7 geschoben. Von der offenen Seite der Hülse 5 her wird dann der Magnetanker, mit dem Stößel 7 voran, in die Hülse 5 eingeführt. Der kleinere Durchmesser ist gerade so groß, dass der Stößel 7, der mit dem Magnetanker 8 verbunden ist, hindurch gleiten kann. Der Stößel 7 gleitet somit durch die Bohrung 17, bis er an der Öffnung im Leiterstück 10 ein Stück weit herausschaut. Die Fesselfeder gelangt an der Durchmesserstufe in Anschlag.The restraint spring 9 is pushed over the pressed into the armature 8 plunger 7. From the open side of the sleeve 5 ago then the armature, with the plunger 7 ahead, inserted into the sleeve 5. The smaller diameter is just so large that the plunger 7, which is connected to the armature 8, can slide therethrough. The plunger 7 thus slides through the bore 17 until it looks out at the opening in the conductor piece 10 a piece. The restraint spring reaches the diameter step.

Der Magnetanker 8 schaut an dem freien Ende der Hülse 5 ein Stück weit über die Hülse 5 hinaus.The armature 8 looks at the free end of the sleeve 5 a little way beyond the sleeve 5 addition.

Die Breite des Luftspaltes des Magnetkreises des Magnetsystems 1 ist durch den Abstand der Stirnfläche des Magnetankers 8 von dem Magnetkern 6 festlegbar. Im Falle der Kurzschlussstromauslösung wird der Magnetanker 8 aufgrund der magnetischen Kraftwirkung des Spulenstroms in die Hülse 5 hinein gezogen, und damit wird der Stößel nach links aus der Hülse heraus getrieben und kann den Kontakthebel zum Öffnen der Kontaktstelle aufschlagen. Ein Vorteil der erfindungsgemäßen Gestaltung des Magnetankers als Zylinder ohne weitere Oberflächenkonturierung liegt darin, dass kein weiterer Luftspalt zwischen dem Magnetanker und der inneren Oberfläche der Hülse 5 entsteht, wenn der Magnetanker in die Hülse 5 hinein gezogen wird. Wenn ein solcher Luftspalt entsteht, wie es beispielsweise im Stand der Technik nach DE 198 45 476 A1 der Fall ist, so verringert dies die Ankerkraft. In der erfindungsgemäßen Ausführung entsteht ein solcher Luftspalt jedoch nicht.The width of the air gap of the magnetic circuit of the magnetic system 1 can be fixed by the distance of the end face of the armature 8 of the magnetic core 6. In the case of short-circuit current release of the armature 8 is pulled into the sleeve 5 due to the magnetic force of the coil current, and thus the plunger is driven to the left out of the sleeve and can open the contact lever to open the contact point. An advantage of the inventive design of the magnet armature As a cylinder without further Oberflächenkonturierung is that no further air gap between the armature and the inner surface of the sleeve 5 is formed when the magnet armature is pulled into the sleeve 5 into it. If such an air gap arises, as for example in the prior art DE 198 45 476 A1 If this is the case, this reduces the anchor force. In the embodiment according to the invention, however, such an air gap does not arise.

Um nun die Breite des Luftspaltes im Ruhezustand mit geringer Fertigungstoleranz einhalten zu können, wird das Magnetsystem 1 in den Leitungsschutzschalter 2 eingesetzt, und dabei wird das Leiterstück 10 zwischen zweien im Abstand der Dicke des Leiterstücks nebeneinander an der Innenseite des Gehäuses angeformten Stege 34, 35, die zusammen ein erstes Lagerorgan 18 bilden, eingeführt und gehalten, während ein Absatz 19, auch als zweites Lagerorgan 19 bezeichnet, an der Innenseite des Gehäuses als Anschlag für den Magnetanker 8 dient. Die Breite des Luftspaltes ist somit durch den Abstand zweier Lagerorgane 18, 19 oder Anlagepunkte im Gehäuse bestimmt, nicht durch Teile des Magnetsystems selbst. Die mit dem Gehäuse verbundenen Anlagepunkte 18, 19 können durch präzise Gehäusefertigung in genauer Lage zueinander eingestellt und mit hoher Reproduzierbarkeit eingehalten werden, wodurch der Luftspalt unabhängig von Fertigungstoleranzen des Magnetsystems wird.In order to be able to comply with the width of the air gap at rest with low manufacturing tolerance, the magnet system 1 is inserted into the circuit breaker 2, and thereby the conductor piece 10 between two spaced apart the thickness of the conductor piece side by side on the inside of the housing molded webs 34, 35th , which together form a first bearing member 18, introduced and held, while a paragraph 19, also referred to as a second bearing member 19, serves as a stop for the magnet armature 8 on the inside of the housing. The width of the air gap is thus determined by the distance between two bearing members 18, 19 or contact points in the housing, not by parts of the magnet system itself. The contact points 18, 19 connected to the housing can be adjusted to each other by precise housing production in an exact position and maintained with high reproducibility be, whereby the air gap is independent of manufacturing tolerances of the magnet system.

Aufgrund der vorangegangenen Beschreibung wird klar, dass das erfindungsgemäße Magnetsystem sehr einfach aufgebaut und ebenso einfach zu montieren ist. Das Magnetsystem wird Schritt für Schritt an dem Joch aufgebaut. Zunächst wird der Magnetkern mit dem Joch vernietet. Die Hülse wird auf den Magnetkern geschoben, der Magnetanker mit dem Stößel werden in die Hülse geschoben, die Spule wir darüber geschoben, alle zusammen wird in das Gehäuse eingesetzt. Es ist nicht erforderlich, kompliziert montierte Unterbaugruppen herzustellen und diese dann zusammenzufügen. Sondern wenige Teile werden sukzessive auf- und ineinandergeschoben, und der kritische Parameter der Luftspaltbreite ist durch eine Gehäusegröße, nämlich den außerhalb des Magnetsystems eingestellten Abstand der beiden Anlagepunkte für das Leiterstück einerseits und den Magnetanker andererseits, mit geringer Toleranzbehaftung einstellbar.Due to the foregoing description, it is clear that the magnet system according to the invention is very simple and easy to assemble. The magnet system is built up step by step on the yoke. First, the magnetic core is riveted to the yoke. The sleeve is pushed onto the magnetic core, the magnet armature with the plunger are pushed into the sleeve, the coil we pushed over it, all together is inserted into the housing. It is not necessary to produce complicated assembled subassemblies and then assemble them. But few parts are successively pushed up and pushed together, and the critical parameter of the air gap width is adjustable by a housing size, namely the set outside the magnet system distance between the two contact points for the conductor piece on the one hand and the armature on the other hand, with low tolerance.

Für den Fachmann ist dabei ohne weiteres ersichtlich, dass die Erfindung nicht auf die Einzelheiten der vorstehenden veranschaulichenden Ausführungsform beschränkt ist, und dass die vorliegende Erfindung in anderen speziellen Formen ausgeführt werden kann, ohne dass von wesentlichen Attributen derselben abgewichen wird, und es ist daher erwünscht, dass die vorliegenden Ausführungsformen in jeder Hinsicht als veranschaulichend und nichtbeschrankend betrachtet werden, wobei auf die beigefügten Ansprüche mehr als auf die vorstehende Beschreibung Bezug genommen wird, und es ist daher beabsichtigt, dass alle Variationen, die innerhalb des Bereichs der Ansprüche liegen, darin eingeschlossen sind. Bezugszeichenliste 1 Magnetsystem 2 Leitungsschutzschalter 3 Joch 4 Spule 5 Hülse 6 Magnetkern 7 Stößel 8 Magnetanker 9 Fesselfeder 10 Leiterstück 11 Festkontaktstück 12 erstes Ende der Hülse 13 zweites Ende der Hülse 14 Bohrung 15 Durchmesserstufe 16 sacklochartige Vertiefung 17 Stirnseite 18 erstes Lagerorgan 19 zweites Lagerorgan 20 Isolierstoffgehäuse 21 langer Schenkel 22 Kurzer Schenkel 23 Erste Platte 24 Zweite Platte 25 U-förmige Wölbung 26 Erste Anschlussleiste 27 Kontakthebel 28 Bewegliches Kontaktstück 29 Litze 30 Strichlierte Linie 31 Strichlierte Linie 32 Bogenförmiger Pfeil 33 Zweite Anschlussleiste 34 Steg 35 Steg It will be readily apparent to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiment. and that the present invention may be embodied in other specific forms without departing from essential attributes thereof, and it is therefore to be understood that the present embodiments are to be considered in all respects illustrative and not restrictive, more than to the claims appended hereto the foregoing description is made, and it is therefore intended to encompass all variations that are within the scope of the claims. <U> REFERENCE LIST </ u> 1 magnet system 2 Circuit breaker 3 yoke 4 Kitchen sink 5 shell 6 magnetic core 7 tappet 8th armature 9 restraint spring 10 conductor piece 11 Fixed contact piece 12 first end of the sleeve 13 second end of the sleeve 14 drilling 15 Diameter step 16 blind hole-like depression 17 front 18 first bearing element 19 second bearing element 20 Insulated 21 long thigh 22 Short thigh 23 First plate 24 Second plate 25 U-shaped vault 26 First terminal block 27 contact lever 28 Movable contact piece 29 braid 30 Dashed line 31 Dashed line 32 Archery arrow 33 Second connection strip 34 web 35 web

Claims (8)

  1. Line circuit breaker (2) with an insulation housing (20) and with a magnet system (1), with a yoke (3), a coil (4), a sleeve (5), a magnet core (6), a plunger (7), magnet armature (8) and a restraint spring (9), a conductor piece (10) being formed on the yoke (3) and bearing a fixed contact piece (11), and the magnet armature (8) being guided movably in the sleeve (5) counter to the force of the restraint spring (9), wherein the magnet core (6) is fastened on the conductor piece (10), wherein the sleeve (5) is in engagement with the magnet core (6) at the first end of said sleeve, and wherein the magnet armature (8) can be guided into and out of the sleeve (5) at the second end of the sleeve (5), characterized in that two bearing members (18, 19) are formed at a fixed distance from one another on the inner side of the insulating housing (20), a first bearing member (18) being designed to hold the conductor piece (10), and the second bearing member (19) being designed as a stop for the magnet armature (8), wherein two webs (34, 35) which are integrally formed next to one another on the inner side of the housing at the distance of the thickness of the conductor piece (10) together form the first bearing member (18), and in that the distance between the magnet core (6) and the magnet armature (8) which determines the air gap in the magnet system (1) can be fixed by the distance between the two bearing members (18, 19).
  2. Line circuit breaker (2) according to Claim 1, characterized in that the magnet core (6) has a bore through which the plunger (7) passes.
  3. Line circuit breaker (2) according to Claim 2, characterized in that the bore is a stepped longitudinal bore with a greater diameter at the end remote from the conductor piece (10), and in that the diameter step forms a first stop for the restraint spring (9).
  4. Line circuit breaker (2) according to Claim 1, characterized in that the outer surface of the magnet core (6) has, at least in the region of engagement with the sleeve (5), a surface configuration which increases the friction between the magnet core (6) and the sleeve (5) in this region.
  5. Line circuit breaker (2) according to Claim 1, characterized in that the plunger (7) is inserted into a depression in the form of a blind hole in an end side of the magnet armature (8) and is fastened therein.
  6. Line circuit breaker (2) according to Claim 3, characterized in that the end side of the magnet armature (8) forms the second stop for the restraint spring (9).
  7. Line circuit breaker (2) according to Claim 1, characterized in that the magnet core (6) is riveted to the conductor piece (10).
  8. Method for producing a line circuit breaker (2) according to Claim 1, characterized in that said method comprises the following steps:
    - forming two bearing members (18, 19) at a fixed distance from one another on the inner side of the isolation housing (20), the first bearing member (18) being formed by two webs (34, 35) together, which are integrally formed next to one another on the inner side of the housing at the distance of the thickness of the conductor piece (10),
    - fastening the magnet core (6) to the conductor piece (10),
    - pushing the sleeve (5) onto the magnet core (6),
    - pushing the restraint spring (9) onto the plunger (7) formed on the magnet armature (8),
    - pushing the magnet armature (8) with the plunger (7) formed thereon and the restraint spring (9) pushed thereon into the sleeve (5),
    - inserting the unit formed from the magnet core (6), the conductor piece (10), the sleeve (5) with the inserted magnet core (6) into the housing of an installation switching device.
EP12707758.4A 2011-03-16 2012-03-07 Magnet system and installation switch device Active EP2686862B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102011014061A DE102011014061B4 (en) 2011-03-16 2011-03-16 Circuit breaker and method of making a circuit breaker
PCT/EP2012/053906 WO2012123307A1 (en) 2011-03-16 2012-03-07 Magnet system and installation switchgear

Publications (2)

Publication Number Publication Date
EP2686862A1 EP2686862A1 (en) 2014-01-22
EP2686862B1 true EP2686862B1 (en) 2016-10-26

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Application Number Title Priority Date Filing Date
EP12707758.4A Active EP2686862B1 (en) 2011-03-16 2012-03-07 Magnet system and installation switch device

Country Status (5)

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EP (1) EP2686862B1 (en)
CN (1) CN103477412B (en)
AR (1) AR088725A1 (en)
DE (1) DE102011014061B4 (en)
WO (1) WO2012123307A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012014670B4 (en) * 2012-07-25 2014-05-22 Abb Ag Magnet system and service switching device as circuit breaker and manufacturing process
CN103545151A (en) * 2013-10-30 2014-01-29 桂林机床电器有限公司 Circuit protection switch
CN114023614B (en) * 2021-10-29 2023-12-22 武汉船用电力推进装置研究所（中国船舶重工集团公司第七一二研究所） Large-scale adjustable electromagnetic short-circuit release

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Publication number Priority date Publication date Assignee Title
DE8527361U1 (en) * 1985-09-25 1986-01-09 Lindner Gmbh, Fabrik Elektrischer Lampen Und Apparate, 8600 Bamberg Short-circuit release device
DE3619239A1 (en) * 1986-06-07 1987-12-10 Kloeckner Moeller Elektrizit Rapid-action tripping device for line protection circuit breakers
FR2779567B1 (en) * 1998-06-03 2000-07-13 Hager Electro OPTIMIZED MAGNETIC SUB-ASSEMBLY
FR2779568B1 (en) * 1998-06-04 2000-07-13 Schneider Electric Ind Sa ELECTRICAL CUT-OFF DEVICE INCLUDING A DIFFERENTIAL TRIP DEVICE AND CIRCUIT BREAKER INCLUDING SUCH A DEVICE
DE19845476B4 (en) * 1998-10-02 2004-08-12 Aeg Niederspannungstechnik Gmbh & Co Kg Magnetic system for miniature circuit breakers
AT412926B (en) * 2001-03-20 2005-08-25 Moeller Gebaeudeautomation Kg JOKE FOR A MAGNETIC SYSTEM OF A SHORT-CIRCUIT RELEASE DEVICE
FR2840448B1 (en) * 2002-05-30 2004-07-23 Schneider Electric Ind Sas OVERVOLTAGE PROTECTION DEVICE
DE102004056281A1 (en) * 2004-11-22 2006-06-08 Abb Patent Gmbh Switching equipment having electromagnetic trip device e.g. for line safety or motor-circuit switches, has housing, contact point which has fixed and mobile contact part and electromagnetic trip device
AT509279A1 (en) * 2008-07-31 2011-07-15 Moeller Gebaeudeautomation Gmbh SWITCHGEAR

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Also Published As

Publication number Publication date
AR088725A1 (en) 2014-07-02
DE102011014061B4 (en) 2013-11-28
CN103477412A (en) 2013-12-25
DE102011014061A1 (en) 2012-09-20
CN103477412B (en) 2016-03-23
WO2012123307A1 (en) 2012-09-20
EP2686862A1 (en) 2014-01-22

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