EP2047487A1 - Overvoltage protection device with mechanical arresting device activated in the case of thermal overload - Google Patents

Overvoltage protection device with mechanical arresting device activated in the case of thermal overload

Info

Publication number
EP2047487A1
EP2047487A1 EP08735575A EP08735575A EP2047487A1 EP 2047487 A1 EP2047487 A1 EP 2047487A1 EP 08735575 A EP08735575 A EP 08735575A EP 08735575 A EP08735575 A EP 08735575A EP 2047487 A1 EP2047487 A1 EP 2047487A1
Authority
EP
European Patent Office
Prior art keywords
overvoltage protection
protection device
slider
brackets
housing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP08735575A
Other languages
German (de)
French (fr)
Other versions
EP2047487B1 (en
Inventor
Edmund ZÄUNER
Georg Wittmann
Sascha Ludewig
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.)
Dehn SE and Co KG
Original Assignee
Dehn and Soehne GmbH and Co KG
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 Dehn and Soehne GmbH and Co KG filed Critical Dehn and Soehne GmbH and Co KG
Priority to PL08735575T priority Critical patent/PL2047487T3/en
Publication of EP2047487A1 publication Critical patent/EP2047487A1/en
Application granted granted Critical
Publication of EP2047487B1 publication Critical patent/EP2047487B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01CRESISTORS
    • H01C7/00Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material
    • H01C7/10Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material voltage responsive, i.e. varistors
    • H01C7/12Overvoltage protection resistors
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H37/00Thermally-actuated switches
    • H01H37/02Details
    • H01H37/08Indicators; Distinguishing marks
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H37/00Thermally-actuated switches
    • H01H37/74Switches in which only the opening movement or only the closing movement of a contact is effected by heating or cooling
    • H01H37/76Contact member actuated by melting of fusible material, actuated due to burning of combustible material or due to explosion of explosive material
    • H01H37/761Contact member actuated by melting of fusible material, actuated due to burning of combustible material or due to explosion of explosive material with a fusible element forming part of the switched circuit
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01TSPARK GAPS; OVERVOLTAGE ARRESTERS USING SPARK GAPS; SPARKING PLUGS; CORONA DEVICES; GENERATING IONS TO BE INTRODUCED INTO NON-ENCLOSED GASES
    • H01T1/00Details of spark gaps
    • H01T1/12Means structurally associated with spark gap for recording operation thereof
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01TSPARK GAPS; OVERVOLTAGE ARRESTERS USING SPARK GAPS; SPARKING PLUGS; CORONA DEVICES; GENERATING IONS TO BE INTRODUCED INTO NON-ENCLOSED GASES
    • H01T1/00Details of spark gaps
    • H01T1/14Means structurally associated with spark gap for protecting it against overload or for disconnecting it in case of failure
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01TSPARK GAPS; OVERVOLTAGE ARRESTERS USING SPARK GAPS; SPARKING PLUGS; CORONA DEVICES; GENERATING IONS TO BE INTRODUCED INTO NON-ENCLOSED GASES
    • H01T4/00Overvoltage arresters using spark gaps
    • H01T4/06Mounting arrangements for a plurality of overvoltage arresters
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H37/00Thermally-actuated switches
    • H01H37/74Switches in which only the opening movement or only the closing movement of a contact is effected by heating or cooling
    • H01H37/76Contact member actuated by melting of fusible material, actuated due to burning of combustible material or due to explosion of explosive material
    • H01H37/761Contact member actuated by melting of fusible material, actuated due to burning of combustible material or due to explosion of explosive material with a fusible element forming part of the switched circuit
    • H01H2037/762Contact member actuated by melting of fusible material, actuated due to burning of combustible material or due to explosion of explosive material with a fusible element forming part of the switched circuit using a spring for opening the circuit when the fusible element melts
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H37/00Thermally-actuated switches
    • H01H37/74Switches in which only the opening movement or only the closing movement of a contact is effected by heating or cooling
    • H01H37/76Contact member actuated by melting of fusible material, actuated due to burning of combustible material or due to explosion of explosive material
    • H01H37/761Contact member actuated by melting of fusible material, actuated due to burning of combustible material or due to explosion of explosive material with a fusible element forming part of the switched circuit
    • H01H2037/762Contact member actuated by melting of fusible material, actuated due to burning of combustible material or due to explosion of explosive material with a fusible element forming part of the switched circuit using a spring for opening the circuit when the fusible element melts
    • H01H2037/763Contact member actuated by melting of fusible material, actuated due to burning of combustible material or due to explosion of explosive material with a fusible element forming part of the switched circuit using a spring for opening the circuit when the fusible element melts the spring being a blade spring

Definitions

  • the invention relates to an overvoltage protection device with activated in thermal overload case mechanical separating device, this comprising connection elements which are moved by means of spring loaded or biased slide from a closed to a current interrupting or potential separating position and wherein the closed position of the connection elements is secured by a solder or thermally releasable adhesive , according to the preamble of claim 1.
  • Overvoltage protection devices with a thermal cut-off device have long been part of the known state of the art.
  • the task of the separation device is, in the event of inadmissible heating of the surge protection unit, z. B. a varistor, to disconnect it from the grid before a destruction of the arrester occurs.
  • connection elements of the separating device are designed so that there is a high surge current carrying capacity and the goal is to produce the quasi-contact pressure for the discharge process by the surge current itself.
  • the separating device according to the invention is structurally designed so that the supply to the voltage-limiting overvoltage protection units, in particular varistors, is formed by two conductor portions through which current flows in the same direction, which in the end rich parallel and pass into a common junction, which is secured by a Lot.
  • the supply to the voltage-limiting overvoltage protection units in particular varistors
  • connection elements which consist of a pair of current-dividing metallic straps, can be made of a mechanically less solid material. By dividing into the two parallel current paths, the dimensioning of the conductor sections can be carried out more cost-effectively, since the current density is halved.
  • the spring of the separating device whose task is to shift in the case of melting the Lotstelle the slide between the current paths and thus interrupt the circuit can be performed with less spring force, so that a low continuous load of Lotstelle is the result.
  • a particularly positive symmetrical design of the bracket sections respectively the entire bracket allows a centric and thus force-neutral positioning and guiding the slider through it.
  • a z. B. wedge-shaped design of the slide supports the separation process directly. Since the slider moves in Abtrennfall directly into the Lotstelle into, negative effects in the separation process, z. As in the prior art existing soldering effectively prevented and achieved a safe, stress-free separation.
  • the latter are positioned in an outer housing.
  • the varistor units are electrically isolated from other components by means of potting or powder coating.
  • the varistors are used with the respective connection elements as a prefabricated module in the outer housing.
  • a part of the electrical and mechanical properties of the varistor unit, for. B. the overload behavior in case of failure by the particularly aus theden material of the outer housing. It is not readily possible according to the prior art, to use the most cost-effective material for the outer housing, but it is a material to select, for. B. must be resistant to high temperatures and non-flammable.
  • the invention proposes to encapsulate the overvoltage protection units, in particular varistors, separately, d. H. to introduce these into a housing encapsulation. Only the material of this housing encapsulation is to be selected according to the special requirements.
  • connection elements consist of a pair of current-dividing metallic stirrups whose overvoltage protection unit, for. B. a varistor, directed ends run parallel and record in their midst the respective contact lug of the overvoltage protection unit.
  • the over-voltage protection unit facing away from the ends of the bracket include a space and are connected to each other. These ends of the brackets also have a section for external connection parts or terminals.
  • the slider In the free space of the already mentioned slider is used with biasing spring, wherein the spring bias in the direction of the contact lug of the overvoltage protective unit is oriented.
  • the slider is designed to have a wedge shape and / or have portions of the bracket has an inclined surface to generate a slider component in a force component on the parallel ends of the bracket such that they are movable away from the contact lug.
  • the at least one solder or adhesive connection is formed.
  • the slider has in one embodiment of the invention has a substantially planar surface portion for optical signaling of the respective slide position, with respect to a corresponding window, which is arranged in the outer housing.
  • a releasable from the slider further surface for optically signaling the Abtrenn ceremoniess is provided.
  • the surface portion of the slider and this further surface is preferably designed in different colors.
  • the movable slide has a cavity in the longitudinal direction for receiving one end or a portion of the biasing spring.
  • a guide groove may be introduced to prevent tilting in the movement to be performed.
  • stirrups are fixed in position by the solder or the adhesive. During the separation process, however, these ends strive by a predictable mechanical residual stress apart, which supports the separation process.
  • the slider moves into the solder or adhesive connection area and penetrates this area to avoid soldering threads in particular, so that a complete and safe separation is achieved.
  • the slider itself consists of an electrically insulating, in particular plastic material.
  • the at least one overvoltage protection unit is arranged in a housing encapsulation which has openings for electrical contacting and wherein the slider is arranged on this housing encapsulation.
  • the housing encapsulation may in this case have a rail which engages in the guide groove at the foot of the slider.
  • the portion of the stirrups for connecting external terminals or other connection parts is fastened or supported on the housing encapsulation.
  • overvoltage protection units in particular varistor disks, can be arranged in parallel within the housing encapsulation.
  • a plurality of such housing encapsulations with overvoltage protection units therein and respective stirrups and slides can be connected in parallel to one another with a group display element in order to indicate in a logical OR operation the possible disconnection case.
  • the sections for the outer connection parts or outer connection terminals are designed in particular for screw connections which can be realized cost-effectively and have a corresponding bend and possibly one or more holes.
  • the overvoltage protection units in each case in the housing encapsulation are used in a series connection outer housing, which can be manufactured from a cost-effective plastic material.
  • FIG. 1 shows an exploded view of a varistor disk located in a housing encapsulation, this assembly being used in a series connection outer housing, and additionally providing a gas discharge arrester in a 1 + 1 circuit;
  • Fig. 2 is an exploded view similar to that of Figure 1, but with a total of three varistor disks, which are each located in a housing encapsulation, and further provided with gas discharge, everything in turn inserted into a series terminal outer housing.
  • FIG. 3 shows a detailed representation of an encapsulated varistor unit with a recognizable separating device
  • FIG. 4 shows a further detailed illustration of the varistor unit located in the housing encapsulation, wherein the disconnecting device is in the untripped state;
  • Fig. 5 is a view similar to that of FIG. 4, but in tripped condition
  • FIG. 6 shows a view from below of the housing encapsulation with a recognizable connecting lug of the varistor disk and connecting part, which has a slot-shaped opening for receiving the connecting lug for the purpose of soldering;
  • Fig. 7 is a view similar to that of FIG. 6, but with two varistor disks within a package encapsulation; 8 is a view similar to that of FIG. 7, but already with connection unit and connection terminals and mounted gas discharge arrester;
  • FIG. 9 shows a multi-pole arrangement of several surge arresters in housing encapsulations with bus bar as status indicator (see also FIG. 2);
  • FIG. 10 shows a multi-pole arrangement of several surge arresters located in housing encapsulations with busbar as status display and recognizable housing section with viewing window, which allows a view of the group display element;
  • Fig. I Ia and I Ib a representation similar to that of FIG. 10, but with a left side separated in the image arrester and corresponding shifted position of the group display element;
  • FIGS. I Ia and I Ib is a representation similar to that of FIGS. I Ia and I Ib, but with the centrally located surge arrester in the separated state;
  • Fig. 13a and 13b is a view similar to that of FIGS. I Ia to 12b, wherein the arranged at the top right in the image arrester is in a separated state, and
  • Fig. Figs. 14a and 14b are views similar to those of Figs. Ia to 13b, with all the arresters in the severed state.
  • FIGS. 1 and 2 takes a series terminal outer housing 11, the housing enclosure 6 with therein Varistorin 7, 7 '.
  • the separating device At the top of the housing enclosure 6 is the separating device according to the invention, which has a slide 4 as a separating element.
  • a pair of brackets 1, 1 ' is designed as a metallic stamped and bent part, wherein the right side in the image ends of the bracket in the Have substantially parallel course.
  • the bracket enclose a space for receiving the slider 4 in the mounted state.
  • FIG. 2 which comprises a 3 + 1 circuit of a total of three varistor groups 7, 7 'located in each case encapsulation 6, there is a group display element 5 which interacts with the sliders 4 in OR connection, i , H. can be actuated accordingly, so that failures of the varistor groups 7, 7 'are correspondingly recognizable.
  • FIG 3 shows the state of the part of the housing encapsulation 6 which is already prefabricated with the separating device, including the contacting element 13 connected by screw connection 10.
  • the varistor 7 is inserted into the housing enclosure 6, which is open at the bottom, the contact lug 14 of the varistor 7 occupying its space between the two temple ends.
  • the Lotstelle 3 then fixes the contact lug 14 with the parallel ends of the bracket 1, 1 '.
  • FIG. 4 again shows the slider 4, which has a surface portion 15, which differs in color from a further surface portion 16 located underneath.
  • the surface portion 15 covers the underlying surface portion 16 almost completely.
  • the slider 4 has moved in the image to the top right, so that the further surface portion 16, the z. B. is held in red, is exposed and represents the error state.
  • the slide 4 is set by the spring 2 and the spring force released when opening the solder joint in the desired sliding movement and penetrates the portion of the solder joint 3 (see FIG. 3).
  • a cavity 17 is introduced, which receives a spring portion.
  • Fig. 6 and 7 show the underside of the housing encapsulation 6 with an inserted varistor (FIG. 6) or in a complete filling with two varistors 7, 7 'connected in parallel, which are connected in the region 9 by soldering to a connection bridge 18.
  • the connecting bridge 18 is used in accordance with the illustration of FIG. 8, the contacting and mechanical attachment of a gas discharge arrester 8 and the inclusion of SSklemm constitution 19 for corresponding leads.
  • a group display element 5 is designed so that it can be controlled individually by each slider, in the sense of a logical OR operation.
  • a housing portion 20 is shown in each case, which has a viewing window 21.
  • a position according to the illustration of FIG. 10 is in the viewing window 21, for example, a recognizable green color corresponding to the corresponding color marking on the collective display element 5.
  • the position of the group display element 5 shifted in this respect is shown omitting the illustration of the housing section 20 in FIGS. 11b, 12b, 13b and 14b, respectively.
  • the mobility of the collective display element ensures the desired displacement position in Abtrennfall even in a completed separation process of the medium surge arrester (Fig. 12b) and the right above in the figure above surge arrester shown in FIG. 13b or when disconnecting all surge arrester according to FIGS. 14a and 14b.

Landscapes

  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Thermistors And Varistors (AREA)
  • Emergency Protection Circuit Devices (AREA)
  • Fuses (AREA)
  • Protection Of Static Devices (AREA)

Abstract

The invention relates to an overvoltage protection device with a mechanical arresting device which is activated in the case of thermal overload, wherein said devices comprise connector elements which can be moved by means of a spring-loaded or pretensioned slider (4) from a closed position to a position in which current is interrupted or voltage is cut off, and wherein the closed position of the connector elements is maintained by a solder material or a thermally detachable adhesive. According to the invention, the connector elements consist of a pair of current-dividing metallic brackets (1, 1'), wherein the ends of said brackets (1, 1') which are directed toward the overvoltage protection element run parallel and include the corresponding contact lug (14) therebetween. The ends of the brackets (1, 1') which are turned away from the overvoltage protection element are connected to each other, enclosing a free space, and have a section (12) for external connector components or connector clamps. The slider (4) with pretensioned spring (2) is set in the free space, wherein the spring pretensioning is directed in the direction of the contact lug (14) of the overvoltage protection element. Furthermore, the slider (4) has a wedge shape and/or sections of the brackets have an inclined surface in order to generate a force component on the parallel ends of the brackets when the slider moves in such a way that said ends of the brackets can be moved away by the contact lug. The aforementioned solder or adhesive connection is formed in the area of the parallel ends of the brackets and the contact lug.

Description

Überspannungsschutzgerät mit im thermischen Überlastfall aktivierter mechanischer Abtrennvorrichtung Surge protection device with mechanical disconnection device activated in thermal overload
Beschreibungdescription
Die Erfindung betrifft ein Überspannungsschutzgerät mit im thermischen Überlastfall aktivierter mechanischer Abtrennvorrichtung, diese umfassend Anschlusselemente, welche mittels federkraftbelastetem oder vorgespanntem Schieber von einer geschlossenen in eine stromunterbrechende oder potentialtrennende Lage bewegbar sind und wobei die geschlossene Position der Anschlusselemente von einem Lot oder thermisch lösbaren Kleber gesichert ist, gemäß Oberbegriff des Patentanspruchs 1.The invention relates to an overvoltage protection device with activated in thermal overload case mechanical separating device, this comprising connection elements which are moved by means of spring loaded or biased slide from a closed to a current interrupting or potential separating position and wherein the closed position of the connection elements is secured by a solder or thermally releasable adhesive , according to the preamble of claim 1.
Überspannungsschutzgeräte mit thermischer Abtrennvorrichtung gehören seit längerer Zeit zum bekannten Stand der Technik. Aufgabe der Abtrennvorrichtung ist es, im Fall einer unzulässigen Erwärmung der Überspannungsschutzeinheit, z. B. eines Varistors, diesen vom Netz zu trennen, bevor eine Zerstörung des Ableiters eintritt.Overvoltage protection devices with a thermal cut-off device have long been part of the known state of the art. The task of the separation device is, in the event of inadmissible heating of the surge protection unit, z. B. a varistor, to disconnect it from the grid before a destruction of the arrester occurs.
Aus der EP 0 987 803 Bl oder der EP 0 905 839 Bl sind Abtrennvorrichtungen bekannt, die als massiver Schieber ausgebildet sind . Der entsprechende Schieber steht unter Federvorspannung und schützt je einen Varistor vor einer unzulässigen thermischen Aufheizung . Die Geschlossenposition der entsprechenden Anschlusselemente wird von einem Lot gesichert. Dieses Lot ist der ständigen Federvorspannkraft, die über den Schieber übertragen wird, ausgesetzt, was einen wesentlichen Nachteil darstellt. Je nach der Leistungsfähigkeit, d . h. der gewünschten Stoßstromtragfähigkeit, sind mehrere Abtrennvorrichtungen erforderlich, was einen kostenseitigen Nachteil darstellt. Es hat sich darüber hinaus gezeigt, dass bei den zitierten Lösungen des Standes der Technik beim Abtrennvorgang unter Bewegungsverlagerung des Schiebers Lotteilchen unter Bildung von Lotfäden mitgerissen werden mit der Folge einer nicht ausreichenden elektrischen Trennung .From EP 0 987 803 B1 or EP 0 905 839 Bl separating devices are known, which are designed as solid slide. The corresponding slide is spring preloaded and protects each a varistor from an inadmissible thermal heating. The closed position of the corresponding connection elements is secured by a solder. This solder is exposed to the constant spring biasing force transmitted via the slider, which is a significant disadvantage. Depending on the performance, d. H. the desired surge current carrying capacity, more separators are required, which is a cost disadvantage. It has also been shown that in the cited solutions of the prior art in the separation process with movement displacement of the slider solder particles are entrained to form solder filaments with the result of insufficient electrical isolation.
Aus dem Gebrauchsmuster DE 295 19 313 U l ist ein Überspannungsschutzgerät mit einer Abtrennvorrichtung der thermischen Art bekannt geworden, wobei über eine Trennwand die Abtrennvorrichtung vom eigentlichen Varistor separat positioniert ist. Die dortige Abtrennvorrichtung verfügt nur über eine geringe Stoßstromtragfähigkeit. Auch ist bei diesem Stand der Technik die Lotstelle einer ständigen Federvorspannkraft ausgesetzt.From the utility model DE 295 19 313 U l a surge protection device with a separation device of the thermal type has become known wherein the separation device is positioned separately from the actual varistor via a partition wall. The local separation device has only a low surge current capability. Also, in this prior art, the soldering point is exposed to a constant spring biasing force.
Bei der Zusammenschaltung mehrerer Abtrennvorrichtungen gemäß EP 0 716 493 ist für jeden dort vorgesehenen Varistor eine separate Abtrennvorrichtung notwendig, wobei sich sogar mehrere Abtrennvorrichtungen je Schutzpfad als erforderlich erweisen.In the interconnection of several separation devices according to EP 0 716 493, a separate separation device is necessary for each varistor provided there, with even several separation devices per protection path being required.
Aus dem Vorgenannten ist es daher Aufgabe der Erfindung, ein weiterentwickeltes Überspannungsschutzgerät mit im thermischen Überlastfall aktivierter mechanischer Abtrennvorrichtung anzugeben, wobei die insbesondere Lotverbindungsstelle der Anschlusselemente, die im Abtrennfall geöffnet wird, nicht ständig der Einwirkung einer mechanischen kraftseitigen Belastung unterliegen soll . Eine weitere Aufgabe der Erfindung besteht darin, dass die Anschlusselemente der Abtrennvorrichtung so ausgeführt werden, dass sich eine hohe Stoßstromtragfähigkeit ergibt und das Ziel besteht, den quasi Kontaktdruck für den Ableitvorgang durch den Stoßstrom selbst zu produzieren.From the foregoing, it is therefore an object of the invention to provide a developed overvoltage protection device activated in thermal overload case mechanical separation device, the particular solder joint of the connection elements, which is opened in Abtrennfall not constantly subject to the action of a mechanical force-side load. Another object of the invention is that the connection elements of the separating device are designed so that there is a high surge current carrying capacity and the goal is to produce the quasi-contact pressure for the discharge process by the surge current itself.
Um die Kosten von Überspannungsschutzgeräten in Grenzen zu halten, soll gemäß der vorliegenden Erfindung ein Einsatz von Materialien, an die besondere elektrische, thermische oder mechanische Anforderungen gestellt werden, nur an ausgewählten Stellen erfolgen.In order to limit the cost of surge protection devices, according to the present invention, the use of materials to which special electrical, thermal or mechanical requirements are imposed, only at selected locations.
Die Lösung der Aufgabe der Erfindung erfolgt gemäß der Merkmalskombination nach Patentanspruch 1, wobei die Unteransprüche mindestens zweckmäßige Ausgestaltungen und Weiterbildungen darstellen.The object of the invention is achieved according to the combination of features according to claim 1, wherein the dependent claims represent at least expedient refinements and developments.
Demnach ist die erfindungsgemäße Abtrennvorrichtung konstruktiv so ausgeführt, dass die Zuführung zu den spannungsbegrenzenden Überspannungsschutzeinheiten, insbesondere Varistoren, durch zwei vom Stoßstrom in gleicher Richtung durchflossene Leiterabschnitte gebildet wird, die im Endbe- reich parallel verlaufen und in eine gemeinsame Verbindungsstelle, die von einem Lot gesichert ist, übergehen.Accordingly, the separating device according to the invention is structurally designed so that the supply to the voltage-limiting overvoltage protection units, in particular varistors, is formed by two conductor portions through which current flows in the same direction, which in the end rich parallel and pass into a common junction, which is secured by a Lot.
Durch den parallelen Stromfluss und die damit verbundenen Kraftwirkungen im Stoßstromfall ziehen sich die entsprechenden Abschnitte der Leiter bzw. Bügel an und bewirken zu diesem Zeitpunkt die gewünschte Erhöhung der Kontaktkraft an der Lotverbindungsstelle.Due to the parallel current flow and the associated force effects in the surge current case, the corresponding sections of the conductors or brackets and cause at this time the desired increase in the contact force at the solder joint.
Damit ist es möglich, die Lotstelle lediglich zur Fixierung der jeweiligen Abschnitte der Bügel auszulegen. Dies gestattet es, die mechanische Dimensionierung der Lotstelle auf ein absolutes Minimum zu beschränken und diese damit besonders thermisch sensibel auszuführen. Die Lotstelle besitzt also nur eine sehr kleine Wärmekapazität. Der notwendige Kontaktdruck für den Ableitvorgang wird gemäß der Erfindungslehre durch den Stoßstrom selber produziert.This makes it possible to design the Lotstelle only for fixing the respective sections of the bracket. This makes it possible to limit the mechanical dimensioning of the soldering point to an absolute minimum and thus make it particularly thermally sensitive. The Lotstelle thus has only a very small heat capacity. The necessary contact pressure for the discharge process is produced according to the theory of the invention by the surge current itself.
Die Anschlusselemente, welche aus einem Paar stromteilender metallischer Bügel bestehen, können aus einem mechanisch weniger festen Material ausgeführt werden. Durch die Aufteilung in die beiden parallelen Strombahnen kann die Dimensionierung der Leiterabschnitte kostengünstiger erfolgen, da die Stromdichte halbiert wird .The connection elements, which consist of a pair of current-dividing metallic straps, can be made of a mechanically less solid material. By dividing into the two parallel current paths, the dimensioning of the conductor sections can be carried out more cost-effectively, since the current density is halved.
Die Feder der Abtrennvorrichtung, deren Aufgabe darin besteht, im Fall des Aufschmelzens der Lotstelle den Schieber zwischen die Strombahnen zu verlagern und damit den Stromkreis zu unterbrechen, kann mit geringerer Federkraft ausgeführt werden, so dass eine niedrige Dauerbelastung der Lotstelle die Folge ist.The spring of the separating device, whose task is to shift in the case of melting the Lotstelle the slide between the current paths and thus interrupt the circuit can be performed with less spring force, so that a low continuous load of Lotstelle is the result.
Eine besonders positive symmetrische Gestaltung der Bügelabschnitte respektive der gesamten Bügel gestattet eine zentrische und damit kraftneutrale Positionierung und Führung des Schiebers durch diese. Eine z. B. keilförmige Ausführung des Schiebers unterstützt den Abtrennvorgang direkt. Da der Schieber im Abtrennfall direkt in die Lotstelle hinein fährt, werden negative Wirkungen beim Abtrennvorgang, z. B. die beim Stand der Technik vorhandenen Lötfäden wirksam unterbunden und eine sichere, spannungsfreie Trennung erreicht.A particularly positive symmetrical design of the bracket sections respectively the entire bracket allows a centric and thus force-neutral positioning and guiding the slider through it. A z. B. wedge-shaped design of the slide supports the separation process directly. Since the slider moves in Abtrennfall directly into the Lotstelle into, negative effects in the separation process, z. As in the prior art existing soldering effectively prevented and achieved a safe, stress-free separation.
Gemäß dem Stand der Technik werden bei Überspannungsschutzgeräten mit Varistoren letztere in ein Außengehäuse positioniert. Dabei werden die Varistoreinheiten mittels Verguss oder Pulverbeschichtung elektrisch von anderen Komponenten isoliert. Die Varistoren werden mit den jeweiligen Anschlusselementen als vorgefertigte Baugruppe in das Außengehäuse eingesetzt. Bei dieser Variante des Standes der Technik wird ein Teil der elektrischen und mechanischen Eigenschaften der Varistoreinheit, z. B. das Überlastverhalten im Fehlerfall durch den besonders auszulegenden Werkstoff des Außengehäuses übernommen. Es ist gemäß dem Stand der Technik also nicht ohne weiteres möglich, den kostengünstigsten Werkstoff für das Außengehäuse zu nutzen, sondern es ist ein Werkstoff auszuwählen, der z. B. hochtemperaturbeständig und nicht brennbar sein muss.According to the prior art, in the case of overvoltage protection devices with varistors, the latter are positioned in an outer housing. The varistor units are electrically isolated from other components by means of potting or powder coating. The varistors are used with the respective connection elements as a prefabricated module in the outer housing. In this variant of the prior art, a part of the electrical and mechanical properties of the varistor unit, for. B. the overload behavior in case of failure by the particularly auszulegenden material of the outer housing. It is not readily possible according to the prior art, to use the most cost-effective material for the outer housing, but it is a material to select, for. B. must be resistant to high temperatures and non-flammable.
Um diesen Nachteil zu vermeiden, ist erfindungsgemäß vorgeschlagen, die Überspannungsschutzeinheiten, insbesondere Varistoren, separat zu kapseln, d . h. diese in eine Gehäusekapselung einzubringen. Dabei ist nur das Material dieser Gehäusekapselung an die besonderen Anforderungen entsprechend auszuwählen.To avoid this disadvantage, the invention proposes to encapsulate the overvoltage protection units, in particular varistors, separately, d. H. to introduce these into a housing encapsulation. Only the material of this housing encapsulation is to be selected according to the special requirements.
Gemäß der Erfindung bestehen die Anschlusselemente aus einem Paar stromteilender metallischer Bügel, deren zur Überspannungsschutzeinheit, z. B. einem Varistor, gerichtete Enden parallel verlaufen und in ihrer Mitte die jeweilige Kontaktfahne der Überspannungsschutzeinheit aufnehmen.According to the invention, the connection elements consist of a pair of current-dividing metallic stirrups whose overvoltage protection unit, for. B. a varistor, directed ends run parallel and record in their midst the respective contact lug of the overvoltage protection unit.
Die der Überspannungsschutzeinheit abgewandten Enden der Bügel schließen einen Freiraum ein und sind miteinander verbunden. Diese Enden der Bügel besitzen darüber hinaus einen Abschnitt für äußere Anschlussteile oder Anschlussklemmen.The over-voltage protection unit facing away from the ends of the bracket include a space and are connected to each other. These ends of the brackets also have a section for external connection parts or terminals.
Im Freiraum ist der bereits erwähnte Schieber mit Vorspannfeder eingesetzt, wobei die Federvorspannung in Richtung Kontaktfahne der Überspannungs- schutzeinheit orientiert ist. Weiterhin ist entweder der Schieber eine Keilform besitzend ausgeführt und/oder es besitzen Abschnitte der Bügel eine Schrägfläche, um bei Schieberbewegung eine Kraftkomponente auf die parallel verlaufenden Enden der Bügel zu erzeugen derart, dass diese von der Kontaktfahne weg bewegbar sind . Im Bereich der parallel verlaufenden Enden der Bügel und der Kontaktfahne ist die mindestens eine Löt- oder Kleberverbindung ausgebildet.In the free space of the already mentioned slider is used with biasing spring, wherein the spring bias in the direction of the contact lug of the overvoltage protective unit is oriented. Furthermore, either the slider is designed to have a wedge shape and / or have portions of the bracket has an inclined surface to generate a slider component in a force component on the parallel ends of the bracket such that they are movable away from the contact lug. In the region of the parallel ends of the bracket and the contact lug, the at least one solder or adhesive connection is formed.
Der Schieber besitzt bei einer Ausführungsform der Erfindung einen im Wesentlichen ebenen Oberflächenabschnitt zur optischen Signalisierung der jeweiligen Schieberposition, und zwar bezogen auf ein entsprechendes Fenster, das im Außengehäuse angeordnet ist.The slider has in one embodiment of the invention has a substantially planar surface portion for optical signaling of the respective slide position, with respect to a corresponding window, which is arranged in the outer housing.
Unterhalb dieses Oberflächenabschnitts des beweglichen Schiebers ist eine vom Schieber freigebbare weitere Fläche zur optischen Signalisierung des Abtrennzustands vorgesehen. Der Oberflächenabschnitt des Schiebers und diese weitere Fläche ist bevorzugt verschiedenfarbig gestaltet.Below this surface portion of the movable slider, a releasable from the slider further surface for optically signaling the Abtrennzustands is provided. The surface portion of the slider and this further surface is preferably designed in different colors.
Im beweglichen Schieber ist in Längsrichtung ein Hohlraum zur Aufnahme eines Endes oder eines Abschnitts der Vorspannfeder befindlich. Darüber hinaus kann im Fuß des Schiebers eine Führungsnut eingebracht sein, um ein Verkanten bei der auszuführenden Bewegung zu verhindern.The movable slide has a cavity in the longitudinal direction for receiving one end or a portion of the biasing spring. In addition, in the foot of the slider, a guide groove may be introduced to prevent tilting in the movement to be performed.
Die parallel verlaufenden Enden der Bügel werden durch das Lot oder den Kleber lagefixiert. Beim Abtrennvorgang jedoch streben diese Enden durch eine vorsehbare mechanische Eigenspannung auseinander, was den Abtrennvorgang unterstützt.The parallel ends of the stirrups are fixed in position by the solder or the adhesive. During the separation process, however, these ends strive by a predictable mechanical residual stress apart, which supports the separation process.
Im Abtrennfall fährt der Schieber in den Lot- oder Kleberverbindungsbereich hinein und durchdringt diesen Bereich zur Vermeidung von insbesondere Lötfäden, so dass eine vollständige und sichere Abtrennung erreicht wird .In the separation case, the slider moves into the solder or adhesive connection area and penetrates this area to avoid soldering threads in particular, so that a complete and safe separation is achieved.
Der Schieber selbst besteht aus einem elektrisch isolierenden, insbesondere Kunststoffmaterial . Wie bereits erläutert, ist die mindestens eine Überspannungsschutzeinheit in einer Gehäusekapselung angeordnet, welche Öffnungen zur elektrischen Kontaktierung besitzt und wobei der Schieber auf dieser Gehäusekapselung angeordnet wird . Die Gehäusekapselung kann hierbei eine Schiene besitzen, die in die Führungsnut am Fuß des Schiebers eingreift.The slider itself consists of an electrically insulating, in particular plastic material. As already explained, the at least one overvoltage protection unit is arranged in a housing encapsulation which has openings for electrical contacting and wherein the slider is arranged on this housing encapsulation. The housing encapsulation may in this case have a rail which engages in the guide groove at the foot of the slider.
Der Abschnitt der Bügel für den Anschluss von äußeren Klemmen oder weiteren Anschlussteilen ist an der Gehäusekapselung befestigt oder stützt sich dort ab.The portion of the stirrups for connecting external terminals or other connection parts is fastened or supported on the housing encapsulation.
Mehrere Überspannungsschutzeinheiten, insbesondere Varistorscheiben, können in Parallelschaltung innerhalb der Gehäusekapselung angeordnet werden.Several overvoltage protection units, in particular varistor disks, can be arranged in parallel within the housing encapsulation.
Mehrere derartige Gehäusekapselungen mit darin befindlichen Überspannungsschutzeinheiten und jeweils vorgesehenen Bügeln und Schiebern können in paralleler Lage zueinander befindlich mit einem Sammelanzeigeele- ment in Verbindung stehen, um in einer logischen ODER-Verknüpfung den möglichen Abtrennfall anzuzeigen.A plurality of such housing encapsulations with overvoltage protection units therein and respective stirrups and slides can be connected in parallel to one another with a group display element in order to indicate in a logical OR operation the possible disconnection case.
Die Abschnitte für die äußeren Anschlussteile oder äußeren Anschlussklemmen sind insbesondere zur kostengünstig realisierbaren Schraubkontaktie- rung ausgebildet und weisen eine dementsprechende Abwinklung und gegebenenfalls eine oder mehrere Bohrungen auf.The sections for the outer connection parts or outer connection terminals are designed in particular for screw connections which can be realized cost-effectively and have a corresponding bend and possibly one or more holes.
Die in der Gehäusekapselung jeweils befindlichen Überspannungsschutzeinheiten sind in einem Reihenanschluss-Außengehäuse eingesetzt, das aus einem kostengünstigen Kunststoffmaterial gefertigt werden kann.The overvoltage protection units in each case in the housing encapsulation are used in a series connection outer housing, which can be manufactured from a cost-effective plastic material.
Ergänzend besteht die Möglichkeit, innerhalb des Reihenanschlussgehäuses mindestens einen Gasentladungsableiter in entsprechender elektrischer Ver- schaltung zu den weiteren Überspannungsschutzeinheiten anzuordnen. Die Erfindung soll nachstehend anhand eines Ausführungsbeispiels sowie unter Zuhilfenahme von Figuren näher erläutert werden.In addition, it is possible within the series connection housing to arrange at least one gas discharge conductor in a corresponding electrical connection to the further overvoltage protection units. The invention will be explained below with reference to an embodiment and with the aid of figures.
Hierbei zeigen :Hereby show:
Fig. 1 eine Explosivdarstellung einer in einer Gehäusekapselung befindlichen Varistorscheibe, wobei diese Baugruppe in einem Reihenan- schluss-Außengehäuse eingesetzt wird und wobei zusätzlich ein Gasentladungsableiter in 1 + 1-Schaltung vorgesehen ist;1 shows an exploded view of a varistor disk located in a housing encapsulation, this assembly being used in a series connection outer housing, and additionally providing a gas discharge arrester in a 1 + 1 circuit;
Fig. 2 eine Explosivdarstellung ähnlich derjenigen nach Fig. 1, jedoch mit insgesamt drei Varistorscheiben, die jeweils in einer Gehäusekapselung befindlich sind, und mit weiterhin vorgesehenem Gasentladungsableiter, alles wiederum eingesetzt in ein Reihenanschluss- Außengehäuse;Fig. 2 is an exploded view similar to that of Figure 1, but with a total of three varistor disks, which are each located in a housing encapsulation, and further provided with gas discharge, everything in turn inserted into a series terminal outer housing.
Fig. 3 eine Detaildarstellung einer gekapselten Varistoreinheit mit erkennbarer Abtrennvorrichtung;3 shows a detailed representation of an encapsulated varistor unit with a recognizable separating device;
Fig. 4 eine weitere Detaildarstellung der in der Gehäusekapselung befindlichen Varistoreinheit, wobei die Abtrennvorrichtung sich im nicht ausgelösten Zustand befindet;4 shows a further detailed illustration of the varistor unit located in the housing encapsulation, wherein the disconnecting device is in the untripped state;
Fig. 5 eine Darstellung ähnlich derjenigen nach Fig . 4, jedoch im ausgelösten Zustand;Fig. 5 is a view similar to that of FIG. 4, but in tripped condition;
Fig. 6 eine Ansicht von unten auf die Gehäusekapselung mit erkennbarer Anschlussfahne der Varistorscheibe und Anschlussteil, welches eine schlitzförmige Öffnung zur Aufnahme der Anschlussfahne zum Zweck der Verlötung besitzt;6 shows a view from below of the housing encapsulation with a recognizable connecting lug of the varistor disk and connecting part, which has a slot-shaped opening for receiving the connecting lug for the purpose of soldering;
Fig. 7 eine Darstellung ähnlich derjenigen nach Fig . 6, jedoch mit zwei Varistorscheiben innerhalb einer Gehäusekapselung; Fig. 8 eine Darstellung ähnlich derjenigen nach Fig . 7, jedoch bereits mit Anschlusseinheit und Anschlussklemmen sowie montiertem Gasent- ladungsableiter;Fig. 7 is a view similar to that of FIG. 6, but with two varistor disks within a package encapsulation; 8 is a view similar to that of FIG. 7, but already with connection unit and connection terminals and mounted gas discharge arrester;
Fig. 9 eine mehrpolige Anordnung von mehreren in Gehäusekapselungen befindlichen Überspannungsableitern mit Sammelschiene als Statusanzeige (siehe auch Fig . 2);9 shows a multi-pole arrangement of several surge arresters in housing encapsulations with bus bar as status indicator (see also FIG. 2);
Fig. 10 eine mehrpolige Anordnung von mehreren in Gehäusekapselungen befindlichen Überspannungsableitern mit Sammelschiene als Statusanzeige und erkennbarem Gehäuseabschnitt mit Sichtfenster, das einen Blick auf das Sammelanzeigeelement ermöglicht;10 shows a multi-pole arrangement of several surge arresters located in housing encapsulations with busbar as status display and recognizable housing section with viewing window, which allows a view of the group display element;
Fig . I Ia und I Ib eine Darstellung ähnlich derjenigen nach Fig . 10, jedoch mit einem im Bild linksseitig abgetrennten Ableiter und entsprechend verschobener Position des Sammelanzeigeelements;Fig. I Ia and I Ib a representation similar to that of FIG. 10, but with a left side separated in the image arrester and corresponding shifted position of the group display element;
Fig. 12a und 12b eine Darstellung ähnlich derjenigen nach den Fig . I Ia und I Ib, jedoch mit dem mittig angeordneten, im abgetrennten Zustand befindlichen Überspannungsabieiter;12a and 12b is a representation similar to that of FIGS. I Ia and I Ib, but with the centrally located surge arrester in the separated state;
Fig . 13a und 13b eine Darstellung ähnlich derjenigen nach den Fig . I Ia bis 12b, wobei der im Bild rechts oben angeordnete Ableiter sich in einem abgetrennten Zustand befindet, undFig. 13a and 13b is a view similar to that of FIGS. I Ia to 12b, wherein the arranged at the top right in the image arrester is in a separated state, and
Fig . 14a und 14b Darstellungen ähnlich derjenigen nach den Fig. I Ia bis 13b, wobei alle Ableiter sich im abgetrennten Zustand befinden.Fig. Figs. 14a and 14b are views similar to those of Figs. Ia to 13b, with all the arresters in the severed state.
Bei den Darstellungen gemäß den Fig . 1 und 2 nimmt ein Reihenanschluss- Außengehäuse 11 die Gehäusekapselung 6 mit darin befindlichen Varistorscheiben 7, 7' auf. An der Oberseite der Gehäusekapselung 6 befindet sich die erfindungsgemäße Abtrennvorrichtung, die als Abtrennelement einen Schieber 4 aufweist. Ein Paar von Bügeln 1, 1' ist als metallisches Stanzbiegeteil ausgeführt, wobei die im Bild rechtsseitigen Enden der Bügel einen im Wesentlichen parallelen Verlauf aufweisen. Darüber hinaus umschließen die Bügel einen Freiraum zur Aufnahme des Schiebers 4 im montierten Zustand .In the illustrations according to FIGS. 1 and 2 takes a series terminal outer housing 11, the housing enclosure 6 with therein Varistorscheiben 7, 7 '. At the top of the housing enclosure 6 is the separating device according to the invention, which has a slide 4 as a separating element. A pair of brackets 1, 1 'is designed as a metallic stamped and bent part, wherein the right side in the image ends of the bracket in the Have substantially parallel course. In addition, the bracket enclose a space for receiving the slider 4 in the mounted state.
Die Bügel 1, 1' gehen in einen Abschnitt 12 zur Kontaktierung mit weiteren Elementen 13 über, wobei die Verbindung zwischen den Teilen 12 und 13 z. B. durch Verschrauben realisiert werden kann.The bracket 1, 1 'go into a section 12 for contacting with other elements 13, wherein the connection between the parts 12 and 13 z. B. can be realized by screwing.
Für die 1 + 1-Schaltung nach Fig . 1 ist noch ein Gasabieiter 8 über entsprechende elektrische Mittel kontaktiert und im Reihenanschluss-Außengehäuse 11 eingesetzt.For the 1 + 1 circuit of FIG. 1 is still a Gasabieiter 8 contacted via corresponding electrical means and used in the series terminal outer housing 11.
Gemäß der Fig. 2, die eine 3 + 1-Schaltung von insgesamt drei, jeweils in einer Gehäusekapselung 6 befindlichen Varistorgruppen 7, 7' umfasst, ist ein Sammelanzeigeelement 5 vorhanden, das mit den Schiebern 4 in ODER-Ver- knüpfung wechselwirkt, d. h. entsprechend betätigbar ist, so dass Ausfälle der Varistorgruppen 7, 7' entsprechend erkennbar sind .According to FIG. 2, which comprises a 3 + 1 circuit of a total of three varistor groups 7, 7 'located in each case encapsulation 6, there is a group display element 5 which interacts with the sliders 4 in OR connection, i , H. can be actuated accordingly, so that failures of the varistor groups 7, 7 'are correspondingly recognizable.
Fig. 3 zeigt den Zustand des bereits mit der Abtrennvorrichtung vorkonfektionierten Teils der Gehäusekapselung 6 einschließlich durch Schraubverbindung 10 angeschlossenen Kontaktierungselement 13.3 shows the state of the part of the housing encapsulation 6 which is already prefabricated with the separating device, including the contacting element 13 connected by screw connection 10.
Der Varistor 7 wird in die unten offene Gehäusekapselung 6 eingeschoben, wobei die Kontaktfahne 14 des Varistors 7 ihren Raum zwischen den beiden Bügelenden einnimmt. Die Lotstelle 3 fixiert dann die Kontaktfahne 14 mit den parallelen Enden der Bügel 1, 1'.The varistor 7 is inserted into the housing enclosure 6, which is open at the bottom, the contact lug 14 of the varistor 7 occupying its space between the two temple ends. The Lotstelle 3 then fixes the contact lug 14 with the parallel ends of the bracket 1, 1 '.
Die Draufsicht nach Fig. 4 lässt wiederum den Schieber 4 erkennen, welcher einen Oberflächenabschnitt 15 aufweist, der sich farblich von einem darunter befindlichen weiteren Flächenabschnitt 16 unterscheidet. Bei der nicht ausgelösten Situation gemäß der Darstellung nach Fig. 4 deckt der Oberflächenabschnitt 15 den darunter befindlichen Flächenabschnitt 16 nahezu vollständig ab. In der ausgelösten Position nach Fig. 5 hat sich der Schieber 4 im Bild nach rechts oben bewegt, so dass der weitere Flächenabschnitt 16, der z. B. in roter Farbe gehalten ist, frei liegt und den Fehlerzustand repräsentiert.The plan view of FIG. 4 again shows the slider 4, which has a surface portion 15, which differs in color from a further surface portion 16 located underneath. In the undelivered situation as shown in FIG. 4, the surface portion 15 covers the underlying surface portion 16 almost completely. In the triggered position of FIG. 5, the slider 4 has moved in the image to the top right, so that the further surface portion 16, the z. B. is held in red, is exposed and represents the error state.
Der Schieber 4 wird durch die Feder 2 und die frei werdende Federkraft bei Öffnung der Lötverbindung in die gewünschte Schiebebewegung versetzt und durchdringt den Abschnitt der Lotverbindung 3 (siehe Fig. 3). Im Inneren des Schiebers 4 ist ein Hohlraum 17 eingebracht, der einen Federabschnitt aufnimmt.The slide 4 is set by the spring 2 and the spring force released when opening the solder joint in the desired sliding movement and penetrates the portion of the solder joint 3 (see FIG. 3). In the interior of the slide 4, a cavity 17 is introduced, which receives a spring portion.
Die Fig . 6 und 7 zeigen die Unterseite der Gehäusekapselung 6 mit einem eingesetzten Varistor (Fig . 6) bzw. in einer kompletten Befüllung mit zwei parallel geschalteten Varistoren 7, 7', die im Bereich 9 durch Lötung mit einer Anschlussbrücke 18 in Verbindung stehen.The Fig. 6 and 7 show the underside of the housing encapsulation 6 with an inserted varistor (FIG. 6) or in a complete filling with two varistors 7, 7 'connected in parallel, which are connected in the region 9 by soldering to a connection bridge 18.
Die Anschlussbrücke 18 dient gemäß der Darstellung nach Fig. 8 auch der Kontaktierung und mechanischen Befestigung eines Gasentladungsableiters 8 und der Aufnahme von Schraubklemmteilen 19 für entsprechende Anschlussdrähte.The connecting bridge 18 is used in accordance with the illustration of FIG. 8, the contacting and mechanical attachment of a gas discharge arrester 8 and the inclusion of Schraubklemmteilen 19 for corresponding leads.
Gemäß Fig . 9, die eine mehrpolige Anordnung gekapselter Varistoreinheiten mit Statusanzeige darstellt, ist ein Sammelanzeigeelement 5 so ausgeführt, dass dieses von jedem Schieber einzeln angesteuert werden kann, und zwar im Sinne einer logischen ODER-Verknüpfung.According to FIG. 9, which represents a multi-pole arrangement of encapsulated varistor units with status display, a group display element 5 is designed so that it can be controlled individually by each slider, in the sense of a logical OR operation.
Mit Hilfe der Fig . 10 bis 14 sei die Wirkung des Sammelanzeigeelements mit Statusanzeige näher erläutert.With the help of Fig. 10 to 14, the effect of the group display element with status display is explained in more detail.
In den Fig . 10, I Ia, 12a, 13a und 14a ist jeweils ein Gehäuseabschnitt 20 gezeigt, der ein Sichtfenster 21 aufweist.In the Figs. 10, I Ia, 12a, 13a and 14a, a housing portion 20 is shown in each case, which has a viewing window 21.
Über das Sichtfenster 21 ist die Position des Sammelanzeigeelements 5, das sich unterhalb des Sichtfensters 21 befindet, erkennbar. In einer Position gemäß der Darstellung nach Fig. 10 ist im Sichtfenster 21 beispielsweise eine grüne Farbe erkennbar, die der entsprechenden farblichen Kennzeichnung auf dem Sammelanzeigeelement 5 entspricht.About the viewing window 21, the position of the collective display element 5, which is located below the viewing window 21, recognizable. In a position according to the illustration of FIG. 10 is in the viewing window 21, for example, a recognizable green color corresponding to the corresponding color marking on the collective display element 5.
Wird z. B. ein Abtrennvorgang beim unteren, linksseitigen Überspannungsab- leiter gemäß Fig . I Ia vollzogen, findet eine Bewegung des Sammelanzeige- elements 5 in Pfeilrichtung statt, d. h. der grün eingefärbte oder mit einer grünen Farbe versehene Teil des Sammelanzeigeelements 5 tritt aus dem Sichtfenster 21 heraus und es wird eine darunter liegende Farbe freigegeben, bevorzugt die Farbe Rot, um einen Fehlerfall zu signalisieren.If z. B. a separation process at the lower, left-side Überspannungsab- conductor according to FIG. I Ia completed, a movement of the Sammelanzeige- element 5 takes place in the arrow direction, d. H. the green-colored or green-colored part of the collective display element 5 emerges from the viewing window 21 and an underlying color is released, preferably the color red, in order to signal a fault.
Die Position des diesbezüglich verschobenen Sammelanzeigeelements 5 ist unter Weglassung der Darstellung des Gehäuseabschnitts 20 jeweils in den Fig. I Ib, 12b, 13b und 14b dargestellt.The position of the group display element 5 shifted in this respect is shown omitting the illustration of the housing section 20 in FIGS. 11b, 12b, 13b and 14b, respectively.
Die Beweglichkeit des Sammelanzeigeelements gewährleistet die gewünschte Verschiebeposition im Abtrennfall auch bei einem vollzogenen Abtrennvorgang des mittleren Überspannungsabieiters (Fig . 12b) bzw. des in der Figur rechts oben dargestellten Überspannungsabieiters gemäß Fig . 13b oder beim Abtrennen sämtlicher Überspannungsabieiter gemäß den Fig . 14a und 14b. The mobility of the collective display element ensures the desired displacement position in Abtrennfall even in a completed separation process of the medium surge arrester (Fig. 12b) and the right above in the figure above surge arrester shown in FIG. 13b or when disconnecting all surge arrester according to FIGS. 14a and 14b.
BezugszeichenlisteLIST OF REFERENCE NUMBERS
1, 1' Leiterabschnitt / Bügel1, 1 'conductor section / bracket
2 Feder2 spring
3 Lotstelle3 Lotstelle
4 Schieber4 slides
5 Sammelanzeigeelement5 group display element
6 Gehäusekapselung 7, 7' Varistoren6 Enclosure encapsulation 7, 7 'varistors
8 Gasentladungsableiter8 gas discharge arresters
9 Verbindungselemente9 fasteners
10 Schraubverbindung10 screw connection
11 Reihenanschluss-Außengehäuse11 row connection outer housing
12 Abschnitt12 section
13 Kontaktierungselement13 contacting element
14 Kontaktfahne14 contact lug
15 Oberflächenabschnitt15 surface section
16 Flächenabschnitt16 area section
17 Hohlraum17 cavity
18 Anschlussbrücke18 connection bridge
19 Schraubklemmteil19 screw clamp
20 Gehäuseabschnitt20 housing section
21 Sichtfenster 21 viewing window

Claims

Patentansprüche claims
1. Überspannungsschutzgerät mit im thermischen Überlastfall aktivierter mechanischer Abtrennvorrichtung, diese umfassend Anschlusselemente, welche mittels federkraftbelastetem oder vorgespanntem Schieber von einer geschlossenen in eine stromunterbrechende oder potentialtrennende Lage bewegbar sind und wobei die geschlossene Position der Anschlusselemente von einem Lot oder thermisch lösbaren Kleber gesichert ist, dadurch gekennzeichnet, dass die Anschlusselemente aus einem Paar stromteilender metallischer Bügel bestehen, deren zur Überspannungsschutzeinheit gerichtete Enden parallel verlaufen und in ihrer Mitte die jeweilige Kontaktfahne der Überspannungsschutzeinheit aufnehmen, die der Überspannungsschutzeinheit abgewandten Enden der Bügel, einen Freiraum einschließend, miteinander verbunden sind und einen Abschnitt für äußere Anschlussteile oder Anschlussklemmen besitzen, im Freiraum der Schieber mit Vorspannfeder eingesetzt ist, wobei die Federvorspannung in Richtung Kontaktfahne der Überspannungsschutzeinheit orientiert ist, weiterhin der Schieber eine Keilform und/oder Abschnitte des Bügels eine Schrägfläche aufweisen, um bei Schieberbewegung eine Kraftkomponente auf die parallel verlaufenden Enden der Bügel zu erzeugen, so dass diese von der Kontaktfahne weg bewegbar sind und dass im Bereich der parallel verlaufenden Enden der Bügel und der Kontaktfahne die Löt- oder Kleberverbindung ausgebildet ist.1. Overvoltage protection device with activated in thermal overload case mechanical separating device, this comprising connection elements which are moved by means of spring loaded or biased slide from a closed to a current interrupting or potential separating position and wherein the closed position of the connecting elements is secured by a solder or thermally releasable adhesive, characterized in that the connection elements consist of a pair of current-dividing metallic stirrups whose ends directed towards the overvoltage protection unit run parallel and receive in the middle the respective contact lugs of the overvoltage protection unit, the ends of the stirrups facing away from the overvoltage protection unit, including a free space, and a section for have outer connecting parts or terminals, in the free space of the slider is inserted with biasing spring, wherein the spring bias in the direction of Ko Furthermore, the slider has a wedge shape and / or portions of the bracket having an inclined surface to generate a slider component, a force component on the parallel ends of the bracket so that they are movable away from the contact lug and that in the parallel ends of the bracket and the contact lug the solder or adhesive connection is formed.
2. Überspannungsschutzgerät nach Anspruch 1, dadurch gekennzeichnet, dass der Schieber einen ebenen Oberflächenabschnitt zur optischen Signalisierung der jeweiligen Schieberposition aufweist.2. Overvoltage protection device according to claim 1, characterized in that the slide has a flat surface portion for optical signaling of the respective slide position.
3. Überspannungsschutzgerät nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass unterhalb des Oberflächenabschnitts des beweglichen Schiebers eine vom Schieber freigebbare weitere Fläche zur optischen Signalisierung des Abtrennzustands vorgesehen ist.3. Overvoltage protection device according to claim 1 or 2, characterized in that below the surface portion of the movable slide one of Slider releasable surface is provided for optical signaling of Abtrennzustands.
4. Überspannungsschutzgerät nach einem der vorangegangenen Ansprüche, dadurch gekennzeichnet, dass im beweglichen Schieber in Längsrichtung ein Hohlraum zur Aufnahme eines Endes der Vorspannfeder befindlich ist.4. Overvoltage protection device according to one of the preceding claims, characterized in that in the movable slide in the longitudinal direction, a cavity for receiving one end of the biasing spring is befindlich.
5. Überspannungsschutzgerät nach einem der vorangegangenen Ansprüche, dadurch gekennzeichnet, dass im Fuß des Schiebers eine Führungsnut eingebracht ist.5. Overvoltage protection device according to one of the preceding claims, characterized in that in the foot of the slide, a guide groove is introduced.
6. Überspannungsschutzgerät nach einem der vorangegangenen Ansprüche, dadurch gekennzeichnet, dass die parallel verlaufenden Enden durch das Lot oder den Kleber lagefixiert sind, beim Abtrennvorgang jedoch durch eine mechanische Eigenspannung auseinanderstreben.6. Overvoltage protection device according to one of the preceding claims, characterized in that the parallel ends are fixed in position by the solder or the adhesive, but diverge during the separation process by a mechanical residual stress.
7. Überspannungsschutzgerät nach einem der vorangegangenen Ansprüche, dadurch gekennzeichnet, dass die Bügel symmetrisch ausgeführt sind .7. Overvoltage protection device according to one of the preceding claims, characterized in that the stirrups are designed symmetrically.
8. Überspannungsschutzgerät nach einem der vorangegangenen Ansprüche, dadurch gekennzeichnet, dass im Abtrennfall der Schieber in den Lot- oder Kleberverbindungsbereich hineinfährt und diesen Bereich zur Vermeidung von insbesondere Lotfäden durchdringt.8. Overvoltage protection device according to one of the preceding claims, characterized in that, in the separation case, the slider moves into the solder or adhesive connection region and penetrates this region in order to avoid, in particular, solder filaments.
9. Überspannungsschutzgerät nach einem der vorangegangenen Ansprüche, dadurch gekennzeichnet, dass der Schieber aus einem elektrisch isolierenden Material besteht. 9. Overvoltage protection device according to one of the preceding claims, characterized in that the slide consists of an electrically insulating material.
10. Überspannungsschutzgerät nach einem der vorangegangenen Ansprüche, dadurch gekennzeichnet, dass die Überspannungsschutzeinheit aus einem oder mehreren Varistoren besteht.10. Overvoltage protection device according to one of the preceding claims, characterized in that the overvoltage protection unit consists of one or more varistors.
11. Überspannungsschutzgerät nach einem der vorangegangenen Ansprüche, dadurch gekennzeichnet, dass die mindestens eine Überspannungsschutzeinheit in einer Gehäusekapselung angeordnet ist, welche Öffnungen zur elektrischen Kontaktierung besitzt und wobei der Schieber auf dieser Gehäusekapselung angeordnet ist.11. Overvoltage protection device according to one of the preceding claims, characterized in that the at least one overvoltage protection unit is arranged in a housing encapsulation, which has openings for electrical contacting and wherein the slide is arranged on this housing encapsulation.
12. Überspannungsschutzgerät nach Anspruch 11, dadurch gekennzeichnet, dass sich der Abschnitt für äußere Anschlussklemmen der Bügel an der Gehäusekapselung abstützt oder dort befestigt ist.12. Overvoltage protection device according to claim 11, characterized in that the portion for external terminals of the bracket is supported on the housing encapsulation or secured there.
13. Überspannungsschutzgerät nach Anspruch 11 oder 12, dadurch gekennzeichnet, dass mehrere Überspannungsschutzeinheiten in Parallelschaltung innerhalb der Gehäusekapselung angeordnet sind .13. Overvoltage protection device according to claim 11 or 12, characterized in that a plurality of overvoltage protection units are arranged in parallel within the housing encapsulation.
14. Überspannungsschutzgerät nach einem der Ansprüche 11 bis 13, dadurch gekennzeichnet, dass mehrere Gehäusekapselungen mit darin befindlichen Überspannungsschutzeinheiten und jeweils vorgesehenen Bügeln und Schiebern mit einem Sam- melanzeigeelement in Verbindung stehen, um in einer logisch ODER-Ver- knüpfung den möglichen Abtrennfall anzuzeigen.14. Overvoltage protection device according to one of claims 11 to 13, characterized in that a plurality of housing encapsulations with therein overvoltage protection units and respective brackets and sliders are in communication with a collective display element in order to indicate the possible disconnection in a logical OR connection.
15. Überspannungsschutzgerät nach einem der vorangegangenen Ansprüche, dadurch gekennzeichnet, dass die Abschnitte für äußere Anschlussteile oder Anschlussklemmen zur Schraubkontaktierung ausgebildet sind . 15. Overvoltage protection device according to one of the preceding claims, characterized in that the sections are designed for external connection parts or terminals for Schraubkontaktierung.
16. Überspannungsschutzgerät nach einem der Ansprüche 11 bis 15, dadurch gekennzeichnet, dass die in der Gehäusekapselung befindlichen Überspannungsschutzeinheiten in einem Reihenanschluss-Außengehäuse eingesetzt sind .16, overvoltage protection device according to one of claims 11 to 15, characterized in that the located in the housing encapsulation overvoltage protection units are used in a series terminal outer housing.
17. Überspannungsschutzgerät nach Anspruch 16, dadurch gekennzeichnet, dass die in den jeweiligen Gehäusekapselungen befindlichen Überspannungsschutzeinheiten als scheibenförmige Varistoren ausgebildet sind, wobei innerhalb des Reihenanschluss-Außengehäuses zusätzlich mindestens ein Gasentladungsableiter angeordnet ist. 17. Overvoltage protection device according to claim 16, characterized in that located in the respective housing encapsulation overvoltage protection units are designed as disk-shaped varistors, wherein within the series terminal outer housing additionally at least one gas discharge arrester is arranged.
EP08735575A 2007-06-11 2008-03-28 Overvoltage protection device with mechanical arresting device activated in the case of thermal overload Active EP2047487B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL08735575T PL2047487T3 (en) 2007-06-11 2008-03-28 Overvoltage protection device with mechanical arresting device activated in the case of thermal overload

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102007026852 2007-06-11
DE102007042991A DE102007042991B4 (en) 2007-06-11 2007-09-10 Surge protection device with mechanical disconnection device activated in thermal overload
PCT/EP2008/053750 WO2008151861A1 (en) 2007-06-11 2008-03-28 Overvoltage protection device with mechanical arresting device activated in the case of thermal overload

Publications (2)

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EP2047487A1 true EP2047487A1 (en) 2009-04-15
EP2047487B1 EP2047487B1 (en) 2010-05-26

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EP (1) EP2047487B1 (en)
CN (1) CN101711417B (en)
AT (1) ATE469427T1 (en)
DE (2) DE102007042991B4 (en)
PL (1) PL2047487T3 (en)
RU (1) RU2009146876A (en)
WO (1) WO2008151861A1 (en)

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Also Published As

Publication number Publication date
CN101711417A (en) 2010-05-19
CN101711417B (en) 2012-02-01
RU2009146876A (en) 2011-07-20
DE502008000709D1 (en) 2010-07-08
DE102007042991B4 (en) 2009-09-17
DE102007042991A1 (en) 2008-12-18
ATE469427T1 (en) 2010-06-15
WO2008151861A1 (en) 2008-12-18
EP2047487B1 (en) 2010-05-26
PL2047487T3 (en) 2010-10-29

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