EP3347910B1 - Device for thermally triggering, separating, and/or signaling the state of a surge protector - Google Patents

Device for thermally triggering, separating, and/or signaling the state of a surge protector Download PDF

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Publication number
EP3347910B1
EP3347910B1 EP16760452.9A EP16760452A EP3347910B1 EP 3347910 B1 EP3347910 B1 EP 3347910B1 EP 16760452 A EP16760452 A EP 16760452A EP 3347910 B1 EP3347910 B1 EP 3347910B1
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EP
European Patent Office
Prior art keywords
locking element
state
force
jaws
slider
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.)
Active
Application number
EP16760452.9A
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German (de)
French (fr)
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EP3347910A1 (en
Inventor
Uwe Strangfeld
Stephan Hierl
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
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Priority to PL16760452T priority Critical patent/PL3347910T3/en
Priority to SI201631314T priority patent/SI3347910T1/en
Publication of EP3347910A1 publication Critical patent/EP3347910A1/en
Application granted granted Critical
Publication of EP3347910B1 publication Critical patent/EP3347910B1/en
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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H37/00—Thermally-actuated switches
    • H01H37/02—Details
    • H01H37/32—Thermally-sensitive members
    • H01H37/46—Thermally-sensitive members actuated due to expansion or contraction of a solid
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H73/00—Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism
    • H01H73/22—Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism having electrothermal release and no other automatic release
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01T—SPARK GAPS; OVERVOLTAGE ARRESTERS USING SPARK GAPS; SPARKING PLUGS; CORONA DEVICES; GENERATING IONS TO BE INTRODUCED INTO NON-ENCLOSED GASES
    • H01T1/00—Details of spark gaps
    • H01T1/14—Means structurally associated with spark gap for protecting it against overload or for disconnecting it in case of failure
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01C—RESISTORS
    • H01C7/00—Non-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
    • H01C7/10—Non-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
    • H01C7/12—Overvoltage protection resistors
    • H01C7/126—Means for protecting against excessive pressure or for disconnecting in case of failure
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H37/00—Thermally-actuated switches
    • H01H37/02—Details
    • H01H37/32—Thermally-sensitive members
    • H01H37/323—Thermally-sensitive members making use of shape memory materials
    • 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
    • H01H71/14—Electrothermal mechanisms
    • H01H71/18—Electrothermal mechanisms with expanding rod, strip, or wire

Definitions

  • the invention relates to a device for thermal triggering, disconnecting and / or signaling the state of an overvoltage protection device with a blocking element on which a first force acts and which changes its physical state and / or its external shape when a limit temperature is exceeded, according to claim 1.
  • the DE 10 2006 037 551 B4 shows a locked separating device, wherein a movable solder preform is put under force by a pretensioned spring, but this cannot evade as long as a solder bolt blocks the path of movement. If the solder bolt melts due to a thermal overload, which is caused, for example, by a high current, the solder preform moves and thus a slide, so that a circuit is closed, which, for example, emits a warning signal.
  • the U.S. 3,412,356 is based on a similar operating principle and shows a thermal fuse in which contact is established between a fixed metal sleeve and a movable contacting element in the sleeve, the movable contacting element being connected to a movement mechanism that is pretensioned by a spring and is blocked by a fixed soldering bolt . If the solder bolt melts, the movable contacting element moves out of the metal sleeve and the electrical contact is interrupted.
  • the DE 10 2010 061 110 A1 also discloses a thermal disconnection device, a first conductor section being galvanically coupled to a second conductor section via a thermally releasable contact. If the temperature is too high, the contact point loosens and the first conductor section is conveyed into an insulating section by a force constantly acting on it, so that an electrical connection is no longer possible between the two conductor sections.
  • the DE 10 2005 045 778 A1 concerns a temperature fuse.
  • Two conductor sections are connected via a third conductor section. If the temperature is too high, this conductor section is actuated by an Bolt moved so that it no longer acts as a connecting element between the other two conductor sections and interrupts a circuit that is closed over the conductor sections.
  • a control compares a temperature recorded by sensors with a predetermined limit temperature and triggers a movement of the bolt when the limit temperature is exceeded.
  • a passive solution can also be implemented using a pretensioned spring or bending element, in which a relaxation movement is blocked by a mechanical safety device. The mechanical fuse is released when a limit temperature is exceeded, as a result of which the relaxation movement of the spring or bending element pushes the connecting element out of the conductor section and thus interrupts the circuit.
  • the DE 10 2009 022 069 A1 shows a device for thermal triggering or disconnection of an overvoltage protection device with a related blocking element which is under the action of a force and a slide which is blocked by the fixed blocking element and on which a second force acts.
  • the ends of the overvoltage protection unit facing the contact lug are designed so that they have a bow shape, with at least one bow representing a stop for a visual indicator that can be pivoted about an axis, the pivoting movement being released when the parallel ends of the The brackets of the contact lugs move laterally away from the contact lug.
  • mechanical actuation devices are designed as bolts or pins.
  • At least two overcurrent protection devices are arranged relative to one another in such a way that the direction vectors of the bolts or pins intersect in an imaginary extension of their movement path, the respective bolt or pin acting on a respective intended surface side of a movable armature and the armature occupying a changeable position in the movement path , but is also located at the intersection of the imaginary extension of the movement paths of the bolts.
  • the armature has a further surface side, which in turn acts on the error signaling element when the armature moves and for this purpose this further surface comprises at least one wedge slope in order to change the direction of force due to the movement of one of the bolts.
  • the object of the present invention is to provide a further developed device for thermally triggering, disconnecting and / or signaling the state of an overvoltage protection device which provides sufficient mechanical forces for actuating a display, a switching contact or the like.
  • the device for thermal triggering, disconnecting and / or signaling the state of the overvoltage protection device comprises a blocking element on which a first force acts and which changes its physical state and / or its external shape when a limit temperature is exceeded.
  • the locking element can change its shape from, for example, a circular cross-section to an elliptical cross-section.
  • the device comprises a slide which is indirectly blocked by the blocking element in a first state.
  • a second force acts on the slide. The second force transfers the slide to a second state when the locking element has changed its physical state.
  • the device has a latching holding device. This is connected to the slide, in particular in a detachable or fixed manner.
  • the locking element indirectly blocks the slide by means of the latching holding device.
  • the holding device is designed in such a way that the second force which acts on the slide essentially only acts in a frictionally locking manner and not in the direction of movement of the first force on the blocking element.
  • the locking element can, for. B. an electrical circuit can be closed. This can take place in particular in that the blocking element is designed to be electrically conductive. Additionally or alternatively, a circuit can be closed by the slide when it is in the first state. This circuit is preferably interrupted when the slide moves into the second state. In particular, this circuit can be interrupted in the second state.
  • the basic idea of the invention is to decouple the locking element from the second, greater force that is required to move the slide and trigger an action. This takes place in that essentially no positive forces, which have their origin in the second force, act on the locking element. Only the first force acts positively, i.e. directly on the locking element.
  • the second force acts essentially solely by frictional engagement, that is to say indirectly on the locking element.
  • a high force can be implemented as the second force that is necessary to move the slide without the locking element being pressed out of its position for a long time and the device being subject to a "creeping release" as a result.
  • the holding device comprises at least two tong-like jaws, of which at least one jaw is designed to be flexible, which in the first state are supported against the locking element and against the surroundings of the slide.
  • An environment in the sense of the invention can in particular be a housing or a housing partition wall of the device, or a device that is connected to the device according to the invention.
  • the jaws are designed to be elastically resilient, so that they return to their original position after a forced deformation State. As a result, the holding element can in particular be reused.
  • the jaws are preferably arranged in such a way that normal forces acting on the locking element essentially compensate one another. This can be achieved in particular by two opposing jaws. A variant with three jaws, each offset by 60 degrees, is also conceivable, so that essentially no resultant force acts on the locking element here either. According to the same principle, more jaws can preferably also be arranged, which are even closer together.
  • One or more jaws can preferably have a beveled step, which are supported against the environment, in particular a housing or a housing partition, in such a way that the second force causes one or more jaws to yield when they are no longer blocked by the locking element.
  • a step can preferably be part of a groove which is supported against a corresponding cam in the surroundings.
  • a step can be part of a cam which is supported against a corresponding groove in the surroundings.
  • the holding device and / or the slide can be positioned easily and precisely during installation by means of a groove-cam connection, in particular without a subsequent displacement taking place.
  • the device has a display area which signals the respective state (first state, second state) of the slide.
  • the display surface can in particular be arranged fixedly or detachably on the slide.
  • the device has a telecommunication device which signals the respective state (first state, further state) of the device.
  • the telecommunication device is connected directly to the slide and / or is triggered by it.
  • the telecommunication device is preferably for closing or interrupting a circuit set up so that, according to a variant, the circuit is interrupted in the first state and closed in the second state.
  • a switch to a second state can be actively implemented.
  • the telecommunication device it is also possible for the telecommunication device to close a circuit in a first state and to interrupt it in a second state.
  • the locking element and / or the holding device is coated to reduce friction.
  • the frictional forces generated by the holding device via the locking element by the second force can be reduced.
  • an even more comprehensive decoupling of the second force from the locking element is possible, so that essentially only the first force acts on the locking element and the locking element can be moved out of the jaws quickly.
  • the contact area between the locking element and the holding device is small.
  • one or more jaws of the holding device can be designed in such a way that it essentially rests on the locking element at only one point.
  • the blocking element can also be designed such that the holding device can essentially only rest at one point or one line.
  • the locking element can preferably be shaped like a wedge or a cone, so that the locking element snaps out of its fixation during the transition to the second state, after a first displacement.
  • the holding device, in particular one or more jaws can also be chamfered in such a way that after a first displacement during the transition to the second state, the force decoupling is canceled and the locking element is additionally accelerated by the second force.
  • Fig. 1 shows a device for thermal tripping or disconnection of an overvoltage protection device with a display area and slide S1 in the first state Z1.
  • a force F2 is applied to this by a spiral spring.
  • the spiral spring is supported on a housing G in which the slide S1 is mounted.
  • the spiral spring serves as an energy store, the force F2 being correspondingly high to move the slide S1.
  • the slide S1 has a holding device which is implemented by two opposing jaws B.
  • a locking element A1 is also provided on the housing G.
  • the blocking element A1 is preferably in thermal contact with a heat source, in particular the overvoltage protection device, and is loosely inserted and held only by the jaws B.
  • the jaws B of the holding device H1 are designed to be flexible, in particular consisting of a flexible plastic material. Furthermore, the jaws B each have an outwardly oriented groove. These are there to each receive a cam, which are implemented as part of the housing G.
  • the second force F2 pushes the slide S1 in the direction of the locking element A1.
  • the jaws B avoid inward deflection by the locking element A1, which is arranged between the ends of the jaws B. This prevents the jaws B from moving in relation to one another and thus also prevents the slide S1 from moving.
  • the locking element A1 prevents movement the jaws B of the slide to each other.
  • the pliers of the jaws cannot be squeezed together.
  • the latching connection H1 prevents the slide from moving.
  • the opposing jaws B compensate for the normal forces which are applied to the holding device H1 via the jaws B by the second force F2. This means that the resulting normal force on the locking element A1 disappears.
  • the second force F2 is thus decoupled from a direct effect on the locking element A1 in the first state.
  • Fig. 2 shows the device for thermal tripping of an overvoltage protection device Fig. 1 .
  • the shape of the blocking element A1 has changed when a limit temperature is exceeded and the device goes into the second state Z2 ( Fig. 3 ) about.
  • Fig. 3 shows the device after Fig. 1 and 2 , the state transition is in a second phase.
  • the locking element A1 was largely deformed by the first force F1. This allows the jaws B of the holding devices to move inward. Due to the second force F2, the jaws B are pressed inwards via the latching means, in particular by the cams of the housing, so that the right side of the groove of the jaws B no longer blocks a movement of the slide S1. The latching connection H1 is thus overcome.
  • the second force F2 accelerates the slide S1 and thus also moves the display area A to the right. This signals, for example, that the overvoltage protection device has tripped.
  • the locking element is not fixed, but only loosely inserted and held between the jaws B by clamping. Furthermore, only a partial force component F1, generated by the spring force F2 via the clamping jaws B, acts on the locking element A1 in a direction that is changed vectorially.
  • the blocking element changes its state of aggregation when a limit temperature is exceeded, that is to say it can be deformed by the partial force component F1, so that ultimately the elastic, resilient ones Clamping jaws B are compressed, with the result that a movement path of the slide S1 is released with recourse to the usually greater force F2.
  • FIG. 4 shows, as a second variant according to the invention, a solution which starts from an elastic jaw B only.
  • the locking element A1 is acted upon by this elastic jaw B against a fixed jaw BF with a force, wherein the fixed jaw BF can be part of the housing G.
  • the blocking element A1 is in thermal contact with a heat source, e.g. an overvoltage protection device, and is held loosely inserted between the jaws B and BF.
  • a heat source e.g. an overvoltage protection device
  • the jaw B has an outwardly oriented groove into which a cam H1, which can be part of the housing G, engages.
  • the mechanism of action when the locking element is heated with subsequent deformation corresponds to that as shown in FIG Figs. 1 to 3 described.
  • the blocking element A1 changes its physical state when a limit temperature is exceeded and is deformed by the partial force component F1 with the result that the elastic clamping jaw B moves in the direction of the fixed jaw BF, with the result that the movement path of the slide S1 is released , with the greater force F2 coming into effect in this regard.

Description

Die Erfindung betrifft eine Vorrichtung zum thermischen Auslösen, Abtrennen und/oder Signalisieren des Zustandes eines Überspannungsschutzgerätes mit einem Sperrelement, auf welches eine erste Kraft wirkt und das bei Überschreiten einer Grenztemperatur seinen Aggregatzustand und/oder seine äußere Gestalt ändert, gemäß Patentanspruch 1.The invention relates to a device for thermal triggering, disconnecting and / or signaling the state of an overvoltage protection device with a blocking element on which a first force acts and which changes its physical state and / or its external shape when a limit temperature is exceeded, according to claim 1.

Die DE 10 2006 037 551 B4 zeigt eine arretierte Abtrenneinrichtung, wobei ein bewegliches Lotformteil durch eine vorgespannte Feder unter Kraft gesetzt wird, dieser aber nicht ausweichen kann, solange ein Lotbolzen den Bewegungsweg blockiert. Schmilzt der Lotbolzen durch eine thermische Überlastung, die beispielsweise von einem hohen Strom verursacht wird, bewegt sich das Lotformteil und damit ein Schieber, so dass ein Stromkreis geschlossen wird, der beispielsweise ein Warnsignal ausgibt.the DE 10 2006 037 551 B4 shows a locked separating device, wherein a movable solder preform is put under force by a pretensioned spring, but this cannot evade as long as a solder bolt blocks the path of movement. If the solder bolt melts due to a thermal overload, which is caused, for example, by a high current, the solder preform moves and thus a slide, so that a circuit is closed, which, for example, emits a warning signal.

Die US 3,412,356 basiert auf einem ähnlichen Wirkprinzip und zeigt eine Thermosicherung, bei der eine Kontaktierung zwischen einer fest angeordneten Metallhülse und einem beweglichen Kontaktierungselement in der Hülse hergestellt ist, wobei das bewegliche Kontaktierungselement mit einem durch eine Feder vorgespannten Bewegungsmechanismus verbunden ist, der durch einen festen Lotbolzen blockiert ist. Schmilzt der Lotbolzen, bewegt sich das bewegliche Kontaktierungselement aus der Metallhülse und der elektrische Kontakt wird unterbrochen.the U.S. 3,412,356 is based on a similar operating principle and shows a thermal fuse in which contact is established between a fixed metal sleeve and a movable contacting element in the sleeve, the movable contacting element being connected to a movement mechanism that is pretensioned by a spring and is blocked by a fixed soldering bolt . If the solder bolt melts, the movable contacting element moves out of the metal sleeve and the electrical contact is interrupted.

Die DE 10 2010 061 110 A1 offenbart ebenfalls eine thermische Abtrennvorrichtung, wobei ein erster Leiterabschnitt mit einem zweiten Leiterabschnitt über einen thermisch lösbaren Kontakt galvanisch gekoppelt ist. Bei zu hoher Temperatur löst sich die Kontaktstelle und der erste Leiterabschnitt wird durch eine ständig auf ihn wirkende Kraft in einen Isolierabschnitt befördert, so dass zwischen den beiden Leiterabschnitten keine elektrische Verbindung mehr möglich ist.the DE 10 2010 061 110 A1 also discloses a thermal disconnection device, a first conductor section being galvanically coupled to a second conductor section via a thermally releasable contact. If the temperature is too high, the contact point loosens and the first conductor section is conveyed into an insulating section by a force constantly acting on it, so that an electrical connection is no longer possible between the two conductor sections.

Die DE 10 2005 045 778 A1 betrifft eine Temperatursicherung. Zwei Leiterabschnitte werden über einen dritten Leiterabschnitt verbunden. Wenn eine zu hohe Temperatur vorliegt, wird dieser Leiterabschnitt durch einen aktuierten Bolzen so bewegt, dass er nicht mehr als Verbindungselement zwischen den beiden anderen Leiterabschnitten wirkt und einen über die Leiterabschnitte geschlossenen Stromkreis unterbricht. Eine Steuerung vergleicht eine sensorisch erfasste Temperatur mit einer vorgegebenen Grenztemperatur und löst eine Bewegung des Bolzens aus, wenn die Grenztemperatur überschritten ist. Anstelle einer aktiven Lösung mit einer Steuerung und einem Sensor kann auch eine passive Lösung durch ein vorgespanntes Feder- oder Biegeelement realisiert sein, bei dem eine Entspannungsbewegung durch eine mechanische Sicherung blockiert ist. Die mechanische Sicherung löst sich bei Überschreiten einer Grenztemperatur, wodurch die Entspannungsbewegung des Feder- oder Biegeelementes das Verbindungselement aus dem Leiterabschnitt befördert und somit den Stromkreis unterbricht.the DE 10 2005 045 778 A1 concerns a temperature fuse. Two conductor sections are connected via a third conductor section. If the temperature is too high, this conductor section is actuated by an Bolt moved so that it no longer acts as a connecting element between the other two conductor sections and interrupts a circuit that is closed over the conductor sections. A control compares a temperature recorded by sensors with a predetermined limit temperature and triggers a movement of the bolt when the limit temperature is exceeded. Instead of an active solution with a controller and a sensor, a passive solution can also be implemented using a pretensioned spring or bending element, in which a relaxation movement is blocked by a mechanical safety device. The mechanical fuse is released when a limit temperature is exceeded, as a result of which the relaxation movement of the spring or bending element pushes the connecting element out of the conductor section and thus interrupts the circuit.

Die DE 10 2009 022 069 A1 zeigt eine Vorrichtung zum thermischen Auslösen oder Abtrennen eines Überspannungsschutzgerätes mit einem diesbezüglichen Sperrelement, welches unter Einwirkung einer Kraft steht und einen Schieber, der durch das fixierte Sperrelement blockiert ist und auf den eine zweite Kraft wirkt.the DE 10 2009 022 069 A1 shows a device for thermal triggering or disconnection of an overvoltage protection device with a related blocking element which is under the action of a force and a slide which is blocked by the fixed blocking element and on which a second force acts.

Bei dem Überspannungsschutzgerät nach DE 10 2013 006 052 A1 werden die zur Kontaktfahne weisenden Enden der Überspannungsschutzeinheit so ausgebildet, dass diese eine Bügelform besitzen, wobei mindestens ein Bügel einen Anschlag für eine, um eine Achse schwenkbare Sichtanzeige darstellt, wobei die Schwenkbewegung dann freigegeben ist, wenn mit Hilfe eines Schiebers die parallel verlaufenden Enden der Bügel der Kontaktfahnen sich von der Kontaktfahne seitlich entfernen. Bei der Defektanzeige für Überspannungsableiter nach DE 10 2012 011 072 A1 sind mechanische Betätigungseinrichtungen als Bolzen oder Stift ausgebildet. Mindestens zwei Überstromschutzeinrichtungen sind derart relativ zueinander angeordnet, dass sich die Richtungsvektoren der Bolzen oder Stifte in einer gedachten Verlängerung ihres Bewegungsweges schneiden, wobei der jeweilige Bolzen oder Stift auf eine jeweils vorgesehene Flächenseite eines verschieblichen Ankers einwirkt und der Anker eine veränderbare Position im Bewegungsweg inne hat, sich jedoch auch im Schnittpunkt der gedachten Verlängerung der Bewegungswege der Bolzen befindet. Weiterhin besitzt der Anker eine weitere Flächenseite, die ihrerseits bei einer Ankerbewegung auf das Fehlersignalisierungselement einwirkt und hierfür diese weitere Fläche mindestens eine Keilschräge umfasst, um eine Änderung der Kraftrichtung aufgrund der Bewegung eines der Bolzen zu bezwecken.In the case of the overvoltage protection device DE 10 2013 006 052 A1 the ends of the overvoltage protection unit facing the contact lug are designed so that they have a bow shape, with at least one bow representing a stop for a visual indicator that can be pivoted about an axis, the pivoting movement being released when the parallel ends of the The brackets of the contact lugs move laterally away from the contact lug. At the defect display for surge arresters after DE 10 2012 011 072 A1 mechanical actuation devices are designed as bolts or pins. At least two overcurrent protection devices are arranged relative to one another in such a way that the direction vectors of the bolts or pins intersect in an imaginary extension of their movement path, the respective bolt or pin acting on a respective intended surface side of a movable armature and the armature occupying a changeable position in the movement path , but is also located at the intersection of the imaginary extension of the movement paths of the bolts. Furthermore, the armature has a further surface side, which in turn acts on the error signaling element when the armature moves and for this purpose this further surface comprises at least one wedge slope in order to change the direction of force due to the movement of one of the bolts.

Nachteilig im Stand der Technik sind dabei insbesondere hohe Kosten, Wartungsanfälligkeit sowie mangelnde Robustheit aktiver Lösungen. Passive Lösungen dagegen sind dadurch beeinträchtigt, dass auf die Sperrelemente unnötig hohe Kräfte wirken, weil gleichzeitig zur Unterbrechung durch die Kräfte auch eine weitere Wirkung, z.B. eine Bewegung eines Schiebers, eines Schaltkontaktes oder dergleichen, durchgeführt werden soll. Dadurch kann es zu einer "schleichenden Auslösung" der Trennvorrichtung kommen bevor überhaupt eine relevante thermische Überlastung aufgetreten ist.Disadvantages in the prior art are, in particular, high costs, susceptibility to maintenance and the lack of robustness of active solutions. Passive solutions, on the other hand, are impaired by the fact that unnecessarily high forces act on the locking elements, because at the same time as the interruption by the forces, another effect, e.g. a movement of a slide, a switching contact or the like, should be carried out. This can lead to a "creeping release" of the separating device before a relevant thermal overload has even occurred.

Aufgabe der vorliegenden Erfindung ist es, eine weiterentwickelte Vorrichtung zum thermischen Auslösen, Abtrennen und/oder Signalisieren des Zustandes eines Überspannungsschutzgerätes anzugeben, welche ausreichende mechanische Kräfte zur Betätigung einer Anzeige, eines Schaltkontaktes oder dergleichen bereitstellt.The object of the present invention is to provide a further developed device for thermally triggering, disconnecting and / or signaling the state of an overvoltage protection device which provides sufficient mechanical forces for actuating a display, a switching contact or the like.

Diese Aufgabe wird durch eine Vorrichtung zum thermischen Auslösen eines Schiebers eines Überspannungsschutzgerätes gemäß Anspruch 1 gelöst. Die Unteransprüche betreffen mindestens bevorzugte Weiterbildungen.This object is achieved by a device for thermally triggering a slide of an overvoltage protection device according to claim 1. The subclaims relate to at least preferred developments.

Die Vorrichtung zum thermischen Auslösen, Abtrennen und/oder Signalisieren des Zustandes des Überspannungsschutzgerätes umfasst ein Sperrelement, auf welches eine erste Kraft wirkt und das bei Überschreiten einer Grenztemperatur seinen Aggregatzustand und/oder seine äußere Gestalt ändert. Beispielsweise kann mit zunehmender Erwärmung das Sperrelement seine Form von z.B. einem kreisrunden Querschnitt in einen elliptischen Querschnitt ändern.The device for thermal triggering, disconnecting and / or signaling the state of the overvoltage protection device comprises a blocking element on which a first force acts and which changes its physical state and / or its external shape when a limit temperature is exceeded. For example, as the temperature increases, the locking element can change its shape from, for example, a circular cross-section to an elliptical cross-section.

Des Weiteren umfasst die Vorrichtung einen Schieber, der in einem ersten Zustand durch das Sperrelement mittelbar blockiert ist. Auf den Schieber wirkt eine zweite Kraft. Die zweite Kraft überführt den Schieber in einen zweiten Zustand, wenn das Sperrelement seinen Aggregatzustand geändert hat.Furthermore, the device comprises a slide which is indirectly blocked by the blocking element in a first state. A second force acts on the slide. The second force transfers the slide to a second state when the locking element has changed its physical state.

Außerdem weist die Vorrichtung eine Rast-Halteeinrichtung auf. Diese ist mit dem Schieber, insbesondere lösbar oder fest, verbunden. Durch die Rast-Halteeinrichtung blockiert das Sperrelement mittelbar den Schieber. Die Halteeinrichtung ist so gestaltet, dass die zweite Kraft, die auf den Schieber wirkt, im Wesentlichen nur reibschlüssig und nicht in Bewegungsrichtung der ersten Kraft auf das Sperrelement wirkt.In addition, the device has a latching holding device. This is connected to the slide, in particular in a detachable or fixed manner. The locking element indirectly blocks the slide by means of the latching holding device. The holding device is designed in such a way that the second force which acts on the slide essentially only acts in a frictionally locking manner and not in the direction of movement of the first force on the blocking element.

Durch das Sperrelement kann z. B. ein elektrischer Stromkreis geschlossen sein. Dies kann insbesondere dadurch erfolgen, dass das Sperrelement elektrisch leitend ausgestaltet ist. Zusätzlich oder alternativ kann durch den Schieber ein Stromkreis geschlossen sein, wenn dieser sich im ersten Zustand befindet. Dieser Stromkreis wird vorzugsweise unterbrochen, wenn der Schieber sich in den zweiten Zustand bewegt. Insbesondere kann dieser Stromkreis im zweiten Zustand unterbrochen sein.The locking element can, for. B. an electrical circuit can be closed. This can take place in particular in that the blocking element is designed to be electrically conductive. Additionally or alternatively, a circuit can be closed by the slide when it is in the first state. This circuit is preferably interrupted when the slide moves into the second state. In particular, this circuit can be interrupted in the second state.

Der Grundgedanke der Erfindung besteht darin, das Sperrelement von der zweiten, größeren Kraft, die erforderlich ist, um den Schieber zu bewegen und eine Aktion auszulösen, zu entkoppeln. Dies erfolgt dadurch, dass im Wesentlichen keine formschlüssigen Kräfte, die ihren Ursprung in der zweiten Kraft haben, auf das Sperrelement wirken. Nur die erste Kraft, wirkt formschlüssig, also direkt auf das Sperrelement. Die zweite Kraft wirkt im Wesentlichen allein reibschlüssig, also indirekt auf das Sperrelement. Insbesondere kann als zweite Kraft, die zur Bewegung des Schiebers notwendig ist, eine hohe Kraft realisiert werden, ohne dass dadurch das Sperrelement langfristig aus seiner Lage gedrückt wird und dadurch die Vorrichtung einer "schleichenden Auslösung" unterliegt.The basic idea of the invention is to decouple the locking element from the second, greater force that is required to move the slide and trigger an action. This takes place in that essentially no positive forces, which have their origin in the second force, act on the locking element. Only the first force acts positively, i.e. directly on the locking element. The second force acts essentially solely by frictional engagement, that is to say indirectly on the locking element. In particular, a high force can be implemented as the second force that is necessary to move the slide without the locking element being pressed out of its position for a long time and the device being subject to a "creeping release" as a result.

Wie bereits erläutert, ist ein Schieber vorhanden, der in seinem ersten Zustand durch das Sperrelement blockiert ist und auf den die zweite Kraft wirkt, um den Schieber in den zweiten Zustand zu überführen, wenn das Sperrelement seinen Aggregatzustand und/oder seine äußere Gestalt geändert hat. Die mit dem Schieber verbundene Rast-Haltevorrichtung, durch die das Sperrelement den Schieber mittelbar blockiert, zerlegt die zweite Kraft in eine Teilkraftkomponente, welche klemmend auf das Sperrelement wirkt.As already explained, there is a slide which is blocked in its first state by the locking element and on which the second force acts to transfer the slide into the second state when the locking element has changed its physical state and / or its external shape . The latching-holding device connected to the slide, through which the blocking element indirectly blocks the slide, splits the second force into a partial force component which has a clamping effect on the blocking element.

Erfindungsgemäß umfasst die Halteeinrichtung wenigstens zwei zangenartige Backen, von denen mindestens eine Backe nachgiebig ausgeführt ist, die sich im ersten Zustand gegen das Sperrelement und gegen eine Umgebung des Schiebers abstützen. Eine Umgebung im Sinn der Erfindung kann dabei insbesondere ein Gehäuse oder eine Gehäusezwischenwand der Vorrichtung sein, oder einer Einrichtung, die mit der erfindungsgemäßen Vorrichtung verbunden ist. Insbesondere sind die Backen elastisch nachgiebig ausgebildet, so dass diese nach einer erzwungen Verformung wieder in ihren ursprünglichen Zustand gelangen. Dadurch kann das Halteelement insbesondere wiederverwendet werden.According to the invention, the holding device comprises at least two tong-like jaws, of which at least one jaw is designed to be flexible, which in the first state are supported against the locking element and against the surroundings of the slide. An environment in the sense of the invention can in particular be a housing or a housing partition wall of the device, or a device that is connected to the device according to the invention. In particular, the jaws are designed to be elastically resilient, so that they return to their original position after a forced deformation State. As a result, the holding element can in particular be reused.

Vorzugsweise sind die Backen so angeordnet sind, dass sich auf das Sperrelement wirkende Normalkräfte im Wesentlichen kompensieren. Dies kann insbesondere durch zwei gegenüberliegende Backen realisiert werden. Denkbar ist auch eine Variante mit drei Backen die jeweils um 60 Grad versetzt sind, so dass auch hier im Wesentlichen keine resultierende Kraft auf das Sperrelement wirkt. Nach dem gleichen Prinzip können vorzugsweise auch mehr Backen angeordnet sein, die noch enger zusammenliegen.
Vorzugsweise können eine oder mehrere Backen eine abgeschrägte Stufung aufweisen, die sich gegen die Umgebung, insbesondere ein Gehäuse oder eine Gehäusetrennwand, so abstützen, dass die zweite Kraft ein Nachgeben einer oder mehrerer Backen bewirkt, wenn diese nicht mehr durch das Sperrelement blockiert sind. Insbesondere ist im ersten Zustand ein Nachgeben einer oder mehrerer Backen blockiert, dadurch dass diese durch die Stufung gegen das Sperrelement gedrückt werden und im Wesentlichen kein Raum zum Nachgeben besteht. Stufung und Sperrelement bewirken, dass die größere, zweite Kraft zur Umgebung abgeleitet wird und nicht das Sperrelement beeinträchtigt.The jaws are preferably arranged in such a way that normal forces acting on the locking element essentially compensate one another. This can be achieved in particular by two opposing jaws. A variant with three jaws, each offset by 60 degrees, is also conceivable, so that essentially no resultant force acts on the locking element here either. According to the same principle, more jaws can preferably also be arranged, which are even closer together.
One or more jaws can preferably have a beveled step, which are supported against the environment, in particular a housing or a housing partition, in such a way that the second force causes one or more jaws to yield when they are no longer blocked by the locking element. In particular, in the first state, a yielding of one or more jaws is blocked, as a result of the fact that they are pressed against the locking element by the step and there is essentially no room for yielding. Stepping and locking element have the effect that the larger, second force is diverted to the environment and does not affect the locking element.

Vorzugsweise kann eine Stufung Teil einer Nut sein, die sich gegen eine entsprechende Nocke der Umgebung abstützt. Alternativ kann eine Stufung Teil einer Nocke sein, die sich gegen eine entsprechende Nut der Umgebung abstützt. Insbesondere kann durch eine Nut-Nocken-Verbindung die Halteeinrichtung und/oder der Schieber beim Einbau einfach und genau positioniert werden, insbesondere, ohne dass eine nachträgliche Verschiebung stattfindet.A step can preferably be part of a groove which is supported against a corresponding cam in the surroundings. Alternatively, a step can be part of a cam which is supported against a corresponding groove in the surroundings. In particular, the holding device and / or the slide can be positioned easily and precisely during installation by means of a groove-cam connection, in particular without a subsequent displacement taking place.

In einer Ausführungsform weist die Vorrichtung eine Anzeigefläche auf, die den jeweiligen Zustand (erster Zustand, zweiter Zustand) des Schiebers signalisiert. Die Anzeigefläche kann insbesondere fest oder lösbar am Schieber angeordnet sein.In one embodiment, the device has a display area which signals the respective state (first state, second state) of the slide. The display surface can in particular be arranged fixedly or detachably on the slide.

In einer Ausführungsform weist die Vorrichtung eine Fernmeldeeinrichtung auf, die den jeweiligen Zustand (erster Zustand, weiter Zustand) der Vorrichtung signalisiert. Insbesondere ist die Fernmeldeeinrichtung direkt mit dem Schieber verbunden und/oder wird durch diesen ausgelöst. Vorzugsweise ist die Fernmeldeeinrichtung zum Schließen oder Unterbrechen eines Stromkreises eingerichtet, so dass nach einer Variante der Stromkreis im ersten Zustand unterbrochen ist und im zweiten Zustand geschlossen ist. Dadurch kann aktiv ein Umschalten in einen zweiten Zustand realisiert werden. Zusätzlich oder alternativ ist es auch möglich, dass durch die Fernmeldeeinrichtung in einem ersten Zustand ein Stromkreis geschlossen ist und in einem zweiten Zustand unterbrochen.In one embodiment, the device has a telecommunication device which signals the respective state (first state, further state) of the device. In particular, the telecommunication device is connected directly to the slide and / or is triggered by it. The telecommunication device is preferably for closing or interrupting a circuit set up so that, according to a variant, the circuit is interrupted in the first state and closed in the second state. As a result, a switch to a second state can be actively implemented. Additionally or alternatively, it is also possible for the telecommunication device to close a circuit in a first state and to interrupt it in a second state.

In einer Ausführungsform ist das Sperrelement und/oder die Halteeinrichtung reibungsmindernd beschichtet. Dadurch können insbesondere die durch die Halteeinrichtung, über das Sperrelement durch die zweite Kraft erzeugten Reibungskräfte gemindert werden. Insbesondere ist damit eine noch umfassendere Entkopplung der zweiten Kraft vom Sperrelement möglich, so dass im Wesentlichen nur die erste Kraft auf das Sperrelement wirkt und ein schnelles Herausbewegen des Sperrelementes aus den Backen gegeben ist.In one embodiment, the locking element and / or the holding device is coated to reduce friction. As a result, in particular the frictional forces generated by the holding device via the locking element by the second force can be reduced. In particular, an even more comprehensive decoupling of the second force from the locking element is possible, so that essentially only the first force acts on the locking element and the locking element can be moved out of the jaws quickly.

Nach einer Ausführungsform ist die Kontaktfläche zwischen Sperrelement und Halteeinrichtung klein. Insbesondere kann eine oder mehrere Backen der Halteeinrichtung so gestaltet sein, dass sie im Wesentlichen nur in einem Punkt auf dem Sperrelement aufliegt. Zusätzlich oder alternativ kann auch das Sperrelement so gestaltet sein, dass die Halteeinrichtung im Wesentlichen nur an einem Punkt oder einer Linie aufliegen kann. Bevorzugt kann das Sperrelement keil- oder kegelförmig geformt sein, so dass beim Übergang in den zweiten Zustand, nach einer ersten Verrückung, das Sperrelement aus seiner Fixierung herausschnellt. Insbesondere kann auch die Halteeinrichtung, insbesondere eine oder mehrere Backen, so angefast sein, dass nach einer ersten Verrückung beim Übergang in den zweiten Zustand, die Kraftentkopplung aufgehoben wird und das Sperrelement durch die zweite Kraft zusätzlich beschleunigt wird.According to one embodiment, the contact area between the locking element and the holding device is small. In particular, one or more jaws of the holding device can be designed in such a way that it essentially rests on the locking element at only one point. Additionally or alternatively, the blocking element can also be designed such that the holding device can essentially only rest at one point or one line. The locking element can preferably be shaped like a wedge or a cone, so that the locking element snaps out of its fixation during the transition to the second state, after a first displacement. In particular, the holding device, in particular one or more jaws, can also be chamfered in such a way that after a first displacement during the transition to the second state, the force decoupling is canceled and the locking element is additionally accelerated by the second force.

Merkmale verschiedener Ausführungsbeispiele können in weiteren, nicht dargestellten Ausführungsformen vorteilhaft miteinander kombiniert werden. Weitere Vorteile und Merkmale ergeben sich aus den Unteransprüchen und den Ausführungsbeispielen. Hierzu zeigt, teilweise schematisiert:

Fig. 1
eine erfindungsgemäße erste Ausführungsform mit zwei nachgiebigen Backen in einem ersten Zustand;
Fig. 2
eine erfindungsgemäße zweite Ausführungsform mit verformtem Sperrelement;
Fig. 3
eine erfindungsgemäße erste Ausführungsform in einem zweiten Zustand und
Fig. 4
eine erfindungsgemäße zweite Ausführungsform mit einer nachgiebigen und einer gegenüberliegenden, starren Backe.
Features of different exemplary embodiments can advantageously be combined with one another in further, non-illustrated embodiments. Further advantages and features emerge from the subclaims and the exemplary embodiments. This shows, partly schematically:
Fig. 1
a first embodiment according to the invention with two flexible jaws in a first state;
Fig. 2
a second embodiment according to the invention with a deformed locking element;
Fig. 3
a first embodiment according to the invention in a second state and
Fig. 4
a second embodiment according to the invention with a flexible and an opposing, rigid jaw.

Fig. 1 zeigt eine Vorrichtung zum thermischen Auslösen oder Abtrennen eines Überspannungsschutzgerätes mit einer Anzeigefläche und Schieber S1 im ersten Zustand Z1. Auf diesen wird durch eine Spiralfeder eine Kraft F2 aufgebracht. Die Spiralfeder stützt sich dazu einem Gehäuse G ab, in dem der Schieber S1 gelagert ist. Die Spiralfeder dient dabei als Kraftspeicher, wobei die Kraft F2 entsprechend hoch ist, um den Schieber S1 zu bewegen. Der Schieber S1 weist eine Halteeinrichtung auf, welche durch zwei gegenüberliegende Backen B realisiert ist. Fig. 1 shows a device for thermal tripping or disconnection of an overvoltage protection device with a display area and slide S1 in the first state Z1. A force F2 is applied to this by a spiral spring. For this purpose, the spiral spring is supported on a housing G in which the slide S1 is mounted. The spiral spring serves as an energy store, the force F2 being correspondingly high to move the slide S1. The slide S1 has a holding device which is implemented by two opposing jaws B.

An dem Gehäuse G ist des Weiteren ein Sperrelement A1 vorgesehen. Das Sperrelement A1 ist bevorzugt in thermischem Kontakt zu einer Wärmequelle, insbesondere dem Überspannungsschutzgerät stehend und ist lose eingelegt und nur von den Backen B gehalten.A locking element A1 is also provided on the housing G. The blocking element A1 is preferably in thermal contact with a heat source, in particular the overvoltage protection device, and is loosely inserted and held only by the jaws B.

Die Backen B der Halteeinrichtung H1 sind nachgiebig ausgestaltet, insbesondere aus einem flexiblen Kunststoffmaterial bestehend. Weiterhin weisen die Backen B jeweils eine nach außen orientierte Nut auf. Diese sind dazu da, jeweils einen Nocken aufzunehmen, die als Teil des Gehäuses G realisiert sind. Durch die zweite Kraft F2 wird der Schieber S1 in Richtung des Sperrelements A1 gedrückt. Durch die Nocken, welche in die Nut der Backen B eingreifen, wird diese Kraft in eine Teilkraftkomponente F1 zerlegt, so dass die Backen nach innen gedrückt werden.The jaws B of the holding device H1 are designed to be flexible, in particular consisting of a flexible plastic material. Furthermore, the jaws B each have an outwardly oriented groove. These are there to each receive a cam, which are implemented as part of the housing G. The second force F2 pushes the slide S1 in the direction of the locking element A1. The cams, which engage in the groove of the jaws B, break this force down into a partial force component F1, so that the jaws are pressed inwards.

Ein Ausweichen der Backen B nach innen wird allerdings durch das Sperrelement A1 vermieden, welches zwischen den Enden der Backen B angeordnet ist. Dadurch wird eine Bewegung der Backen B zueinander verhindert und damit auch eine Bewegung des Schiebers S1. In diesem ersten Zustand, in dem das Sperrelement A1 formstabil ist, verhindert das Sperrelement A1 eine Bewegung der Backen B des Schiebers zueinander. Die Zangen der Backen können also nicht zusammengedrückt werden. Eine Bewegung des Schiebers ist durch die Rastverbindung H1 ausgeschlossen.However, the jaws B avoid inward deflection by the locking element A1, which is arranged between the ends of the jaws B. This prevents the jaws B from moving in relation to one another and thus also prevents the slide S1 from moving. In this first state, in which the locking element A1 is dimensionally stable, the locking element A1 prevents movement the jaws B of the slide to each other. The pliers of the jaws cannot be squeezed together. The latching connection H1 prevents the slide from moving.

Durch die gegenüber angeordneten Backen B kompensieren sich die Normalkräfte, die über die Backen B durch die zweite Kraft F2 auf die Halteeinrichtung H1 aufgebracht werden. Dadurch ergibt sich, dass die resultierende Normalkraft auf das Sperrelement A1 verschwindet. Die zweite Kraft F2 ist somit von einer direkten Wirkung auf das Sperrelement A1 im ersten Zustand entkoppelt.The opposing jaws B compensate for the normal forces which are applied to the holding device H1 via the jaws B by the second force F2. This means that the resulting normal force on the locking element A1 disappears. The second force F2 is thus decoupled from a direct effect on the locking element A1 in the first state.

Fig. 2 zeigt die Vorrichtung zum thermischen Auslösen eines Überspannungsschutzgerätes aus Fig. 1. Dabei hat sich die Form des Sperrelements A1 durch Überschreiten einer Grenztemperatur verändert und die Vorrichtung geht in den zweiten Zustand Z2 (Fig. 3) über. Fig. 2 shows the device for thermal tripping of an overvoltage protection device Fig. 1 . The shape of the blocking element A1 has changed when a limit temperature is exceeded and the device goes into the second state Z2 ( Fig. 3 ) about.

Fig. 3 zeigt die Vorrichtung nach Fig.1 und 2, wobei der Zustandsübergang in einer zweiten Phase ist. Durch die erste Kraft F1 wurde das Sperrelement A1 weitgehend verformt. Dadurch können sich die Backen B der Halteeinrichtungen nach innen bewegen. Durch die zweite Kraft F2 werden die Backen B über die Rastmittel, insbesondere durch die Nocken des Gehäuses nach Innen gedrückt, so dass die rechte Seite der Nut der Backen B eine Bewegung des Schiebers S1 nicht mehr blockiert. Die Rastverbindung H1 ist somit überwunden. Die zweite Kraft F2 beschleunigt den Schieber S1 und bewegt somit auch die Anzeigefläche A nach rechts. Dies signalisiert z.B. ein Auslösen des Überspannungsschutzgerätes. Fig. 3 shows the device after Fig. 1 and 2 , the state transition is in a second phase. The locking element A1 was largely deformed by the first force F1. This allows the jaws B of the holding devices to move inward. Due to the second force F2, the jaws B are pressed inwards via the latching means, in particular by the cams of the housing, so that the right side of the groove of the jaws B no longer blocks a movement of the slide S1. The latching connection H1 is thus overcome. The second force F2 accelerates the slide S1 and thus also moves the display area A to the right. This signals, for example, that the overvoltage protection device has tripped.

Gemäß der Erfindung und den Erläuterungen im vorangegangenen Ausführungsbeispiel ist das Sperrelement nicht fixiert, sondern nur lose eingelegt und zwischen den Backen B klemmend gehalten. Weiterhin wirkt nur eine Teilkraftkomponente F1, erzeugt durch die Federkraft F2 über die Klemmbacken B in einer vektoriell geänderten Richtung auf das Sperrelement A1.According to the invention and the explanations in the previous embodiment, the locking element is not fixed, but only loosely inserted and held between the jaws B by clamping. Furthermore, only a partial force component F1, generated by the spring force F2 via the clamping jaws B, acts on the locking element A1 in a direction that is changed vectorially.

Wesentlich ist, dass das Sperrelement beim Überschreiten einer Grenztemperatur seinen Aggregatzustand ändert, d.h. durch die Teilkraftkomponente F1 verformbar ist, so dass letztendlich die elastischen, nachgiebigen Klemmbacken B zusammengedrückt werden, mit der Folge der Freigabe eines Bewegungsweges des Schiebers S1 unter Rückgriff auf die üblicherweise größere Kraft F2.It is essential that the blocking element changes its state of aggregation when a limit temperature is exceeded, that is to say it can be deformed by the partial force component F1, so that ultimately the elastic, resilient ones Clamping jaws B are compressed, with the result that a movement path of the slide S1 is released with recourse to the usually greater force F2.

Die Ausführungsform gemäß Fig. 4 zeigt als zweite erfindungsgemäße Variante eine Lösung, welche lediglich von einer elastischen Backe B ausgeht. Das Sperrelement A1 wird von dieser elastischen Backe B gegen eine feste Backe BF mit einer Kraft beaufschlagt, wobei die feste Backe BF Bestandteil des Gehäuses G sein kann.The embodiment according to Fig. 4 shows, as a second variant according to the invention, a solution which starts from an elastic jaw B only. The locking element A1 is acted upon by this elastic jaw B against a fixed jaw BF with a force, wherein the fixed jaw BF can be part of the housing G.

Auch bei dieser Ausführungsform steht das Sperrelement A1 im thermischen Kontakt zu einer Wärmequelle, z.B. einem Überspannungsschutzgerät, und ist lose eingelegt zwischen den Backen B und BF gehalten.In this embodiment too, the blocking element A1 is in thermal contact with a heat source, e.g. an overvoltage protection device, and is held loosely inserted between the jaws B and BF.

Auch bei dieser Ausführungsform weist die Backe B eine nach außen orientierte Nut auf, in die eine Nocke H1, die Bestandteil des Gehäuses G sein kann, eingreift.In this embodiment, too, the jaw B has an outwardly oriented groove into which a cam H1, which can be part of the housing G, engages.

Der Wirkungsmechanismus bei Erwärmung des Sperrelements mit nachfolgender Verformung entspricht demjenigen, wie anhand der Fig. 1 bis 3 geschildert. Auch hier ist wesentlich, dass das Sperrelement A1 bei Überschreiten einer Grenztemperatur seinen Aggregatzustand ändert und insofern durch die Teilkraftkomponente F1 verformt wird mit der Folge, dass die elastische Klemmbacke B sich in Richtung fester Backe BF bewegt mit der Folge der Freigabe des Bewegungswegs des Schiebers S1, wobei diesbezüglich die größere Kraft F2 zur Wirkung kommt.The mechanism of action when the locking element is heated with subsequent deformation corresponds to that as shown in FIG Figs. 1 to 3 described. Here, too, it is essential that the blocking element A1 changes its physical state when a limit temperature is exceeded and is deformed by the partial force component F1 with the result that the elastic clamping jaw B moves in the direction of the fixed jaw BF, with the result that the movement path of the slide S1 is released , with the greater force F2 coming into effect in this regard.

Claims (10)

  1. A device for thermally triggering, disconnecting, and/or signaling the state of a surge protection device, comprising:
    - a locking element (A1) on which a first force (F1) acts and which changes its state of aggregation and/or its outer shape when a limit temperature is exceeded;
    - a slider (S1) which, in a first state (Z1), is blocked by the locking element (A1) and on which a second force (F2) acts in order to transfer the slider to a second state (Z2) when the locking element (A1) has changed its state of aggregation and/or its outer shape, wherein
    a latching retaining means (H1) is provided, which is connected with the slider (S1) and by which the locking element (A1) indirectly blocks the slider, and
    by which the second force (F2), broken down into a partial force component, acts on the locking element (A1) in a clamping manner, and furthermore
    the latching retaining means (H1) includes at least two jaws (B; BF) which, in the first state (Z1), are supported against the locking element (A1) and against a surrounding area (G) of the slider (S1), the first force (F1) corresponding to the partial force component, at least one of the jaws (B) being designed to be elastic and resilient.
  2. The device according to claim 1,
    characterized in that
    the second force (F2) is brought about by a pretensioned spring and/or by a mass.
  3. The device according to claim 1,
    characterized in that
    at least one jaw has a stepping which can push against a fixed point such that the partial force component causes the jaw to yield when the latter is not blocked by the locking element (A1).
  4. The device according to claim 3,
    characterized in that
    the stepping is part of a groove which is supported against a corresponding cam of the surrounding area (G) and/or in that the stepping is part of a cam which is supported against a corresponding groove of the surrounding area.
  5. The device according to any of the preceding claims,
    characterized in that
    the locking element (A1) is adapted to be arranged in thermal contact with a heat source, in particular the surge protection device.
  6. The device according to any of the preceding claims,
    characterized in that
    the locking element (A1) is held in a loosely inserted state by the jaws (B; BF).
  7. The device according to any of the preceding claims, characterized in that
    the slider (S1) is adapted to be connected to a display surface which signals the respective state (Z1, Z2) of the device.
  8. The device according to any of the preceding claims,
    characterized in that the slider (S1) is configured to trigger a remote signaling device which signals the respective state (Z1, Z2) of the device.
  9. The device according to claim 8,
    characterized in that
    an electric circuit can be interrupted and/or closed by the remote signaling device.
  10. The device according to any of the preceding claims,
    characterized in that
    the contact surface between the locking element (A1) and the retaining means (H1) is designed to be punctiform or linear.
EP16760452.9A 2015-09-08 2016-08-31 Device for thermally triggering, separating, and/or signaling the state of a surge protector Active EP3347910B1 (en)

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SI201631314T SI3347910T1 (en) 2015-09-08 2016-08-31 Device for thermally triggering, separating, and/or signaling the state of a surge protector

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DE102015011730 2015-09-08
DE102015014163.5A DE102015014163A1 (en) 2015-09-08 2015-11-03 Device for thermal release, disconnection and / or signaling of the state of an overvoltage protection device
PCT/EP2016/070464 WO2017042062A1 (en) 2015-09-08 2016-08-31 Device for thermally triggering, separating, and/or signaling the state of a surge protector

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DE102018125520A1 (en) 2018-10-15 2020-04-16 Dehn Se + Co Kg Surge protection device with several surge arresters and associated, in particular thermal, disconnection device
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ES2881637T3 (en) 2021-11-30
CN108028153B (en) 2020-06-05
CN108028153A (en) 2018-05-11
PL3347910T3 (en) 2021-10-04
DE102015014163A1 (en) 2017-03-09
EP3347910A1 (en) 2018-07-18
SI3347910T1 (en) 2021-11-30
WO2017042062A1 (en) 2017-03-16

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