EP2115759B1 - Protective device and method for its operation - Google Patents
Protective device and method for its operation Download PDFInfo
- Publication number
- EP2115759B1 EP2115759B1 EP07721899.8A EP07721899A EP2115759B1 EP 2115759 B1 EP2115759 B1 EP 2115759B1 EP 07721899 A EP07721899 A EP 07721899A EP 2115759 B1 EP2115759 B1 EP 2115759B1
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- EP
- European Patent Office
- Prior art keywords
- switching
- switching element
- switching device
- current
- electrical
- Prior art date
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- 230000001681 protective effect Effects 0.000 title claims abstract description 23
- 238000000034 method Methods 0.000 title claims abstract description 14
- 238000004804 winding Methods 0.000 claims abstract description 20
- 230000001960 triggered effect Effects 0.000 claims abstract description 7
- 230000010354 integration Effects 0.000 claims abstract description 4
- 238000005259 measurement Methods 0.000 claims description 8
- 230000007246 mechanism Effects 0.000 claims description 7
- 230000008859 change Effects 0.000 description 8
- 238000010438 heat treatment Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 230000001419 dependent effect Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/10—Operating or release mechanisms
- H01H71/12—Automatic release mechanisms with or without manual release
- H01H71/123—Automatic release mechanisms with or without manual release using a solid-state trip unit
- H01H71/125—Automatic release mechanisms with or without manual release using a solid-state trip unit characterised by sensing elements, e.g. current transformers
-
- 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
Definitions
- the invention relates to a protective device according to the preamble of claim 1 and a method for operating such a protective device.
- a circuit supplying the electrical load (s) must be automatically disconnected. Triggering of the interruption may be e.g. based on overloading associated with heating, e.g. of a heating wire connected to the circuit, e.g. Circuit breaker with bimetallic releases can be used. Electronic solutions for protection against overload are e.g. Overload relays, which include, for example, transducers. These transducers transmit a signal equivalent to the current flow in a current path to be monitored to a processing unit; Based on this signal, a simulation of a heating of the consumer takes place. If the simulated temperature exceeds a predetermined or predefinable value, an interruption of the current flow in the current path is triggered.
- Overload relays which include, for example, transducers. These transducers transmit a signal equivalent to the current flow in a current path to be monitored to a processing unit; Based on this signal, a simulation of a heating of the consumer takes place. If the simulated temperature exceeds a predetermined or predefinable value
- the DE 195 32 197 describes to protect against overload, the use of a current transformer, which comprises at least one primary and at least one with this transformer coupled secondary winding. For simultaneous, accurate detection of the rated current and an overload, a load in the secondary branch can be switched from a first resistance value to a second resistance value, whereby saturation is avoided in the event of an overload.
- the switching device may additionally comprise at least one additional temperature sensor, which measures and reports a temperature increase, which is accompanied by a slow increase of the current in the event of an overcurrent, in order to be able to detect in the event of a fault whether an overcurrent or a short-circuit current exists.
- EP-A1-0762590 describes the closest prior art.
- An object of the invention is to provide a particularly suitable device for protection against overload.
- a particularly suitable method for operating such a protective device should be specified.
- the object is achieved according to the invention by the features of claim 1.
- the protective device which is provided for combining with a, a main power line comprehensive electrical switching device or for integration into such a switching device and which at least one switching element, which as electrical or mechanical switching element may be designed, as well as provided for the actuation of the switching element, influenced by a current flow through the main power line switching device comprises, is integrated to influence the switching device in the main power line at least one current transformer.
- the main power line can form a primary line of the current transformer.
- an electrical resistance or an electrical conductivity of at least one secondary winding encompassed by the current transformer can be measured.
- the influencing of the switching device is also effected on the basis of a current induced in the secondary winding.
- a weighting may be provided, e.g. Eliminate environmental effects. Utilizing the secondary winding of the current transformer to detect the overload and to determine a change in temperature, in particular a temperature increase, allows a cost-effective and space-saving implementation of the protective device while optimizing their function, eg. Protection of consumers and self-protection.
- the term electrical switching device is here and below a switching device for enabling an electrical Current flow and / or interruption of the electrical current flow referred to.
- the switching element may be an electrical or mechanical switching element and be actuated, for example, by means of at least one electrically magnetizable magnetic drive or a mechanical switching mechanism.
- this object is achieved by the features of claim 2. It is provided for the operation of the protective device according to the invention that the influence of the switching device, the measurement of the resistance of the secondary winding takes place.
- the switching device for actuating the switching element is triggered when the measured resistance or conductance reaches a predetermined or predefinable threshold or exceeds or falls below.
- the threshold value is adapted or adaptable to the switching device or a consumer.
- the invention is based on the recognition that the resistance and electrical conductivity of a material change with its temperature, and that therefore can be concluded from such a change to a temperature change or the temperature / the temperature change can be determined.
- the temperature of its secondary winding changes depending on the current flow through the main power line.
- a temperature change of the secondary winding but also in a general change in temperature of the environment take place.
- the resistance eg in the Determined secondary winding of the transducer eg measured, it can be based on the measured value, or on the basis of this determine temperature or temperature change, an interruption of the current flow.
- the resistance measurement takes place at predefined or predefinable points in time, in particular in accordance with a predetermined or predefinable measuring cycle.
- the resistance measurement can be carried out continuously. As a result, a continuous monitoring of the resistance and thus the temperature is possible.
- the switching element is arranged in a control circuit enclosing the switching device and in the event of an interruption of the control circuit, an interruption of the current flow through the main current line is effected by actuating the switching element.
- the switching element is triggered by a switching mechanism of the switching device, e.g. a so-called switch lock, assigned and an actuation of the switching element causes a triggering of the switching mechanism and an interruption of the current flow through the main power line.
- a switching mechanism of the switching device e.g. a so-called switch lock
- the advantage of the invention and its embodiments is in particular that in a simple and cost-effective manner, namely by means of the resistance measurement in the secondary winding of the current transformer associated with the protective device, protection against overload is ensured.
- a combination of the protection and / or switching device can be done with other devices, e.g. at least one additional second switching device for detecting and protecting against short-circuits.
- FIG. 1 shows as an example of an electrical switching device 10, with which the invention is concerned, a so-called contactor.
- a protective device 12 is combined.
- the electrical switching device 10 is provided for switching a main power line 14.
- the main current line 14 and a primary circuit formed therewith also extend into the protective device 12.
- a switching device 16 for detecting overcurrent in the main current line 14 is provided in the region of the main current line 14.
- the switching device 16 acts on a switching element 18 in a the protective device 12 and the electrical Switching device 10 comprehensive control circuit 20 is arranged.
- On the part of the electrical switching device 10 is located in the control circuit 20, a magnetic drive 22.
- the primary circuit can be interrupted by interrupting the control circuit 20 by a befindaji on the part of the electrical switching device 10 in the primary circuit switching contact 24 due to actuation by the magnetic drive 22nd is opened.
- FIG. 2 shows an embodiment of the protective device 12 according to the invention.
- a current transformer 26 is integrated in the main power line 14.
- the main power line 14 form a primary line of the current transformer 26.
- the switching device 16 is influenced by the current transformer 26, so that, if necessary, an actuation of the switching element 18 and thus opening of the switching contact 24 occurs.
- the electrical resistance or the electrical conductivity of a secondary winding encompassed by the current transformer 26 is measured by the switching device 16.
- the electrical resistance or the electrical conductivity of the secondary winding is dependent on the temperature thereof, which in turn depends on a current flow in the secondary winding and, due to the spatial proximity of the secondary winding and main current line 14, on the temperature of the main current line 14.
- the resistance measurement can be carried out continuously or at predetermined or predefinable points in time, in particular in accordance with a predetermined or predefinable measuring cycle.
- the resistance measurement according to the measuring cycle has the advantage that temperature changes in the secondary winding are reduced to a minimum due to the measurement.
- FIG. 3 shows an embodiment of the invention, in which the protective device 12 is integrated into the electrical switching device 10.
- electrical switching device 10 a circuit breaker is shown here.
- contactor is here by the switching device 16 via a not shown, acting as a switching element 18 triggers a switching mechanism 28, for example, a so-called.
- Switch lock unlatches, which opens the switch contact 24.
- FIG. 3 is still shown that in the main power line 14, a short-circuit release 30 is integrated, which is also provided for unlatching the switching mechanism 28.
- a protective device 12 for combination with a, a main power line 14 comprehensive electrical switching device 10 or for integration into such a switching device 10, with a switching element 18 and provided for its operation, influenced by a current flow through the main power line 14 switching device 16, wherein the Influencing the switching device 16 in the main power line 14, a current transformer 26 is integrated and an electrical resistance of a secondary winding of the current transformer 26 is measured, and a method for operating a protection device 12 according to the invention, wherein the switching device 16 is triggered to actuate the switching element 18, if the measured resistance reaches or exceeds a predetermined or predefinable threshold value.
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Emergency Protection Circuit Devices (AREA)
Abstract
Description
Die Erfindung betrifft eine Schutzeinrichtung gemäß dem Oberbegriff des Anspruchs 1 sowie ein Verfahren zum Betrieb einer solchen Schutzeinrichtung.The invention relates to a protective device according to the preamble of claim 1 and a method for operating such a protective device.
Zum Schutz von elektrischen Verbrauchern vor Überlast muss ein den oder die elektrischen Verbraucher versorgender Stromkreis automatisch unterbrochen werden können. Eine Auslösung der Unterbrechung kann dabei z.B. auf Basis einer mit einer Überlast einhergehende Erwärmung, z.B. eines mit dem Stromkreis in Verbindung stehenden Heizdrahtes, erfolgen, wobei z.B. Stromkreisunterbrecher mit Bimetall-Auslösern Verwendung finden können. Elektronische Lösungen zum Schutz vor Überlast sind z.B. Überlastrelais, welche beispielsweise Messwandler umfassen. Diese Messwandler geben ein dem Stromfluss in einer zu überwachenden Strombahn äquivalentes Signal an eine Verarbeitungseinheit weiter; auf Basis dieses Signals erfolgt eine Simulation einer Erwärmung des Verbrauchers. Überschreitet die simulierte Temperatur einen vorgegebenen oder vorgebbaren Wert wird eine Unterbrechung des Stromflusses in der Strombahn ausgelöst.To protect electrical loads from overload, a circuit supplying the electrical load (s) must be automatically disconnected. Triggering of the interruption may be e.g. based on overloading associated with heating, e.g. of a heating wire connected to the circuit, e.g. Circuit breaker with bimetallic releases can be used. Electronic solutions for protection against overload are e.g. Overload relays, which include, for example, transducers. These transducers transmit a signal equivalent to the current flow in a current path to be monitored to a processing unit; Based on this signal, a simulation of a heating of the consumer takes place. If the simulated temperature exceeds a predetermined or predefinable value, an interruption of the current flow in the current path is triggered.
Die
Aus der
Eine Aufgabe der Erfindung ist es, eine besonders geeignete Vorrichtung zum Schutz vor Überlast anzugeben. Darüber hinaus soll ein besonders geeignetes Verfahren zum Betrieb einer solchen Schutzeinrichtung angegeben werden.An object of the invention is to provide a particularly suitable device for protection against overload. In addition, a particularly suitable method for operating such a protective device should be specified.
Bezüglich der Vorrichtung wird die genannte Aufgabe erfindungsgemäß gelöst durch die Merkmale des Anspruchs 1. Bei der Schutzeinrichtung, welche zur Kombination mit einem, eine Hauptstromleitung umfassenden elektrischen Schaltgerät oder zur Integration in ein solches Schaltgerät vorgesehen ist und welche zumindest ein Schaltelement, welches als elektrisches oder mechanisches Schaltelement ausgeführt sein kann, sowie eine zur Betätigung des Schaltelements vorgesehene, von einem Stromfluss durch die Hauptstromleitung beeinflussten Schaltvorrichtung, umfasst, ist zur Beeinflussung der Schaltvorrichtung in die Hauptstromleitung zumindest ein Stromwandler integriert. Dabei kann die Hauptstromleitung eine Primärleitung des Stromwandlers bilden. Zur Beeinflussung der Schaltvorrichtung ist ein elektrischer Widerstand oder eine elektrische Leitfähigkeit zumindest einer von dem Stromwandler umfassten Sekundärwicklung messbar. Zusätzlich erfolgt die Beein- H flussung der Schaltvorrichtung auch aufgrund eines in der Sekundärwicklung induzierten Stroms erfolgen. Hierbei kann eine Gewichtung vorgesehen sein, um z.B. Umgebungseffekte zu eliminieren. Eine Nutzung der Sekundärwicklung des Stromwandlers zur Erfassung der Überlast sowie zur Ermittlung einer Temperaturänderung, insbesondere einer Temperaturerhöhung, ermöglicht eine kostengünstige und platzsparende Realisierung der Schutzeinrichtung bei gleichzeitiger Optimierung ihrer Funktion, also z.B. Schutz von Verbrauchern und Eigenschutz.With regard to the device, the object is achieved according to the invention by the features of claim 1. In the protective device, which is provided for combining with a, a main power line comprehensive electrical switching device or for integration into such a switching device and which at least one switching element, which as electrical or mechanical switching element may be designed, as well as provided for the actuation of the switching element, influenced by a current flow through the main power line switching device comprises, is integrated to influence the switching device in the main power line at least one current transformer. In this case, the main power line can form a primary line of the current transformer. To influence the switching device, an electrical resistance or an electrical conductivity of at least one secondary winding encompassed by the current transformer can be measured. In addition, the influencing of the switching device is also effected on the basis of a current induced in the secondary winding. In this case, a weighting may be provided, e.g. Eliminate environmental effects. Utilizing the secondary winding of the current transformer to detect the overload and to determine a change in temperature, in particular a temperature increase, allows a cost-effective and space-saving implementation of the protective device while optimizing their function, eg. Protection of consumers and self-protection.
Mit dem Begriff elektrisches Schaltgerät wird hier und im Folgenden ein Schaltgerät zur Ermöglichung eines elektrischen Stromflusses und/oder Unterbrechung des elektrischen Stromflusses bezeichnet. Dabei kann das Schaltelement ein elektrisches oder mechanisches Schaltelement sein und beispielsweise mittels zumindest eines elektrisch magnetisierbaren Magnetantriebs oder eines mechanischen Schaltschlosses betätigbar sein.The term electrical switching device is here and below a switching device for enabling an electrical Current flow and / or interruption of the electrical current flow referred to. In this case, the switching element may be an electrical or mechanical switching element and be actuated, for example, by means of at least one electrically magnetizable magnetic drive or a mechanical switching mechanism.
Bezüglich des Verfahrens wird diese Aufgabe erfindungsgemäß gelöst durch die Merkmale des Anspruchs 2. Dabei ist zum Betrieb der erfindungsgemäßen Schutzeinrichtung vorgesehen, dass zur Beeinflussung der Schaltvorrichtung die Messung des Widerstands der Sekundärwicklung erfolgt. Die Schaltvorrichtung zur Betätigung des Schaltelements wird ausgelöst, wenn der gemessene Widerstand oder Leitwert einen vorgegebenen oder vorgebbaren Schwellwert erreicht oder über- bzw. unterschreitet. Der Schwellwert ist dabei an das Schaltgerät oder einen Verbraucher angepasst oder anpassbar. Zweckmäßige Weiterbildungen dieses Verfahrens sind Gegenstand der auf diesen Anspruch rückbezogenen Unteransprüche.With regard to the method, this object is achieved by the features of claim 2. It is provided for the operation of the protective device according to the invention that the influence of the switching device, the measurement of the resistance of the secondary winding takes place. The switching device for actuating the switching element is triggered when the measured resistance or conductance reaches a predetermined or predefinable threshold or exceeds or falls below. The threshold value is adapted or adaptable to the switching device or a consumer. Advantageous developments of this method are the subject of the dependent claims.
Die Erfindung geht dabei von der Erkenntnis aus, dass sich Widerstand und elektrische Leitfähigkeit eines Materials mit seiner Temperatur ändern, und dass somit aus solch einer Änderung auf eine Temperaturänderung geschlossen oder die Temperatur/die Temperaturänderung ermittelt werden kann.The invention is based on the recognition that the resistance and electrical conductivity of a material change with its temperature, and that therefore can be concluded from such a change to a temperature change or the temperature / the temperature change can be determined.
Im Falle einer Überlast, welche zu einer Temperaturerhöhung führt, soll ein Stromfluss durch die Hauptstromleitung mittels der Schaltvorrichtung unterbrochen werden, um ansonsten zu besorgende Schäden zu vermeiden.In the case of an overload, which leads to an increase in temperature, a flow of current through the main power line should be interrupted by means of the switching device, in order to avoid otherwise to be attended damage.
Bei einem Wandler, z.B. Messwandler, welcher sich in räumlicher Nähe zu der Hauptstromleitung befindet, ändert sich beispielsweise die Temperatur von dessen Sekundärwicklung in Abhängigkeit vom Stromfluss durch die Hauptstromleitung. Zudem oder alternativ kann eine Temperaturänderung der Sekundärwicklung aber auch bei einer allgemeinen Temperaturänderung der Umgebung erfolgen. Wird nun der Widerstand z.B. in der Sekundärwicklung des Wandlers ermittelt, also z.B. gemessen, so kann auf Basis des Messwerts, oder auf Basis der aus diesem ermitteln Temperatur oder Temperaturänderung eine Unterbrechung des Stromflusses erfolgen.For example, in a transducer, such as a transducer, which is in close proximity to the main power line, the temperature of its secondary winding changes depending on the current flow through the main power line. In addition or alternatively, a temperature change of the secondary winding but also in a general change in temperature of the environment take place. Will the resistance eg in the Determined secondary winding of the transducer, eg measured, it can be based on the measured value, or on the basis of this determine temperature or temperature change, an interruption of the current flow.
In einer bevorzugten Ausführungsform erfolgt die Widerstandsmessung zu vorgegebenen oder vorgebbaren Zeitpunkten, insbesondere entsprechend einem vorgegebenen oder vorgebbaren Messtakt. Alternativ kann die Widerstandsmessung kontinuierlich erfolgen. Hierdurch wird eine fortlaufende Überwachung des Widerstandes und somit der Temperatur ermöglicht.In a preferred embodiment, the resistance measurement takes place at predefined or predefinable points in time, in particular in accordance with a predetermined or predefinable measuring cycle. Alternatively, the resistance measurement can be carried out continuously. As a result, a continuous monitoring of the resistance and thus the temperature is possible.
Bevorzugt ist das Schaltelement in einem das Schaltgerät einschließenden Steuerstromkreis angeordnet und bei einer Unterbrechung des Steuerstromkreises wird durch Betätigen des Schaltelements eine Unterbrechung des Stromflusses durch die Hauptstromleitung bewirkt.Preferably, the switching element is arranged in a control circuit enclosing the switching device and in the event of an interruption of the control circuit, an interruption of the current flow through the main current line is effected by actuating the switching element.
In einer alternativen Ausführungsform ist das Schaltelement als Auslöser einer Schaltmechanik des Schaltgeräts, z.B. ein sogenanntes Schaltschloss, zugeordnet und eine Betätigung des Schaltelements bewirkt eine Auslösung der Schaltmechanik und eine Unterbrechung des Stromflusses durch die Hauptstromleitung.In an alternative embodiment, the switching element is triggered by a switching mechanism of the switching device, e.g. a so-called switch lock, assigned and an actuation of the switching element causes a triggering of the switching mechanism and an interruption of the current flow through the main power line.
Somit liegt der Vorteil der Erfindung und ihrer Ausgestaltungen insbesondere darin, dass auf eine einfache und kostengünstige Art und Weise, nämlich mittels der Widerstandsmessung in der Sekundärwicklung des der Schutzeinrichtung zugeordneten Stromwandlers, ein Schutz vor Überlast gewährleistet wird. Zudem kann eine Kombination des Schutz- und/oder Schaltgerätes mit weiteren Vorrichtungen erfolgen, z.B. zumindest einer zusätzlichen zweiten Schaltvorrichtung zur Erkennung von und zum Schutz vor Kurzschlüssen.Thus, the advantage of the invention and its embodiments is in particular that in a simple and cost-effective manner, namely by means of the resistance measurement in the secondary winding of the current transformer associated with the protective device, protection against overload is ensured. In addition, a combination of the protection and / or switching device can be done with other devices, e.g. at least one additional second switching device for detecting and protecting against short-circuits.
Die Ausführungsbeispiele sind nicht als Einschränkung der Erfindung zu verstehen. Vielmehr sind im Rahmen der vorliegenden Offenbarung zahlreiche Abänderungen und Modifikationen möglich, insbesondere solche Varianten, Elemente und Kombinationen und/oder Materialien, die zum Beispiel durch Kombination oder Abwandlung von einzelnen in Verbindung mit den in der allgemeinen Beschreibung und Ausführungsformen sowie den Ansprüchen beschriebenen und in den Zeichnungen enthaltenen Merkmalen bzw. Elementen oder Verfahrensschritten für den Fachmann im Hinblick auf die Lösung der Aufgabe entnehmbar sind und durch kombinierbare Merkmale zu einem neuen Gegenstand oder zu neuen Verfahrensschritten bzw. Verfahrensschrittfolgen führen.The embodiments are not to be understood as limiting the invention. Rather, numerous modifications and variations are within the scope of the present disclosure possible, in particular those variants, elements and combinations and / or materials, for example, by combination or modification of individual in connection with the features described in the general description and embodiments and the claims and in the drawings or elements or method steps for the Skilled in terms of solving the problem are removable and lead by combinable features to a new subject or to new process steps or process steps.
Nachfolgend wird ein Ausführungsbeispiel der Erfindung anhand der Zeichnung näher erläutert. Einander entsprechende Gegenstände oder Elemente sind in allen Figuren mit den gleichen Bezugszeichen versehen.An embodiment of the invention will be explained in more detail with reference to the drawing. Corresponding objects or elements are provided in all figures with the same reference numerals.
Darin zeigen
- FIG 1
- ein mit einer Schutzeinrichtung kombiniertes elektrisches Schaltgerät,
- FIG 2
- eine mit dem elektrischen Schaltgerät kombinierte Schutzeinrichtung,
- FIG 3
- eine in das elektrische Schaltgerät integrierte Schutzeinrichtung.
- FIG. 1
- a combined with a protective device electrical switching device,
- FIG. 2
- a protective device combined with the electrical switching device,
- FIG. 3
- a protective device integrated into the electrical switching device.
Damit lässt sich die Erfindung kurz wie folgt darstellen:Thus, the invention can be briefly represented as follows:
Angegeben wird eine Schutzeinrichtung 12 zur Kombination mit einem, eine Hauptstromleitung 14 umfassenden elektrischen Schaltgerät 10 oder zur Integration in ein solches Schaltgerät 10, mit einem Schaltelement 18 und einer zu dessen Betätigung vorgesehenen, von einem Stromfluss durch die Hauptstromleitung 14 beeinflussten Schaltvorrichtung 16, wobei zur Beeinflussung der Schaltvorrichtung 16 in die Hauptstromleitung 14 ein Stromwandler 26 integriert ist und ein elektrischer Widerstand einer von dem Stromwandler 26 umfassten Sekundärwicklung messbar ist, sowie ein Verfahren zum Betrieb einer erfindungsgemäßen Schutzeinrichtung 12, wobei die Schaltvorrichtung 16 zur Betätigung des Schaltelements 18 ausgelöst wird, wenn der gemessene Widerstand einen vorgegebenen oder vorgebbaren Schwellwert erreicht oder überschreitet. Disclosed is a
Claims (5)
- Protective device (12) for combination with an electrical switching device (10) comprising a main current line (14) or for integration into such a switching device (10), with a switching element (18) and a switching facility (16) provided for its actuation influenced by a flow of current through the main current line (14), with a current transformer (26) being integrated into the main current line (14) for influencing the switching facility (16), characterized in that
the switching facility (16) is provided for determining a temperature of the main current line (14) based on a temperature induced in a secondary winding included in the current transformer (26), and
that the temperature is able to be determined on the basis of an electrical resistance of the secondary winding caused by the induced temperature. - Method for operating a protective device according to claim 1, wherein the switching facility (16) is triggered for actuation of the switching element (18) if the measured resistance reaches or exceeds a predetermined or predeterminable threshold value.
- Method according to claim 2, wherein the resistance is measured at predetermined or predeterminable points in time, especially in accordance with a predetermined or predeterminable measurement cycle.
- Method according to claim 2 or 3, wherein the switching element (18) is arranged in a control circuit (20) including the switching device (10) and wherein an interruption of the control circuit (20) by actuation of the switching element (18) causes an interruption of the current flow through the main current line (14).
- Method according to claim 2 or 3, wherein the switching element (18) is assigned to a switching mechanism (28) of the switching device (10) as a trigger and wherein an actuation of the switching element (18) causes a triggering of the switching mechanism (28) and an interruption of the flow of current through the main current line (14).
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/DE2007/000230 WO2008095454A1 (en) | 2007-02-07 | 2007-02-07 | Protective device and method for its operation |
Publications (2)
Publication Number | Publication Date |
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EP2115759A1 EP2115759A1 (en) | 2009-11-11 |
EP2115759B1 true EP2115759B1 (en) | 2013-12-25 |
Family
ID=38537612
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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EP07721899.8A Not-in-force EP2115759B1 (en) | 2007-02-07 | 2007-02-07 | Protective device and method for its operation |
Country Status (7)
Country | Link |
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US (1) | US8243409B2 (en) |
EP (1) | EP2115759B1 (en) |
KR (1) | KR101315935B1 (en) |
CN (1) | CN101601112B (en) |
DE (1) | DE112007003443A5 (en) |
ES (1) | ES2446091T3 (en) |
WO (1) | WO2008095454A1 (en) |
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DE102010038894B4 (en) * | 2010-08-04 | 2014-12-24 | Siemens Aktiengesellschaft | Measuring system, circuit breaker and method |
DE102013225732B4 (en) | 2013-12-12 | 2023-08-17 | Bayerische Motoren Werke Aktiengesellschaft | High-voltage fuse for vehicles |
Family Cites Families (10)
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US4249068A (en) * | 1978-09-28 | 1981-02-03 | Joyal Products, Inc. | Method and apparatus for controlling heat energy of a bonding transformer |
US6452767B1 (en) | 1995-03-13 | 2002-09-17 | Square D Company | Arcing fault detection system for a secondary line of a current transformer |
US6242993B1 (en) | 1995-03-13 | 2001-06-05 | Square D Company | Apparatus for use in arcing fault detection systems |
EP0762590B1 (en) * | 1995-08-31 | 1999-10-27 | Siemens Aktiengesellschaft | Line circuit breaker |
DE19532197C2 (en) | 1995-08-31 | 2000-05-18 | Siemens Ag | Power converter |
JP2001148312A (en) | 1999-11-22 | 2001-05-29 | Seiko Epson Corp | Temperature detecting circuit and temperature detecting method |
CN2483876Y (en) * | 2001-06-21 | 2002-03-27 | 乐清市华美利电子有限公司 | Residual current action circuit breaker |
DE10253018B4 (en) | 2002-11-14 | 2013-02-28 | Abb Ag | Switching device and system and method for current measurement in the switching device |
DE102004039601B3 (en) * | 2004-08-13 | 2006-07-13 | Intedis Gmbh & Co. Kg | Circuit arrangement for protecting a conductor element against overcurrent |
DE102004056436B4 (en) * | 2004-11-19 | 2019-04-04 | Jenoptik Advanced Systems Gmbh | Method and device for detecting residual current arcs in electrical circuits |
-
2007
- 2007-02-07 KR KR1020097018655A patent/KR101315935B1/en active IP Right Grant
- 2007-02-07 US US12/449,399 patent/US8243409B2/en not_active Expired - Fee Related
- 2007-02-07 WO PCT/DE2007/000230 patent/WO2008095454A1/en active Application Filing
- 2007-02-07 EP EP07721899.8A patent/EP2115759B1/en not_active Not-in-force
- 2007-02-07 DE DE112007003443T patent/DE112007003443A5/en not_active Withdrawn
- 2007-02-07 CN CN2007800510727A patent/CN101601112B/en not_active Expired - Fee Related
- 2007-02-07 ES ES07721899.8T patent/ES2446091T3/en active Active
Also Published As
Publication number | Publication date |
---|---|
DE112007003443A5 (en) | 2010-01-21 |
US20100002350A1 (en) | 2010-01-07 |
WO2008095454A1 (en) | 2008-08-14 |
KR101315935B1 (en) | 2013-10-08 |
KR20100014930A (en) | 2010-02-11 |
ES2446091T3 (en) | 2014-03-06 |
CN101601112A (en) | 2009-12-09 |
EP2115759A1 (en) | 2009-11-11 |
CN101601112B (en) | 2013-09-04 |
US8243409B2 (en) | 2012-08-14 |
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