EP3371860B1 - Overvoltage protection device for electrical terminal devices - Google Patents

Overvoltage protection device for electrical terminal devices Download PDF

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Publication number
EP3371860B1
EP3371860B1 EP16787430.4A EP16787430A EP3371860B1 EP 3371860 B1 EP3371860 B1 EP 3371860B1 EP 16787430 A EP16787430 A EP 16787430A EP 3371860 B1 EP3371860 B1 EP 3371860B1
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EP
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Prior art keywords
connection
overvoltage protection
protection device
conductor
control signal
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EP16787430.4A
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German (de)
French (fr)
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EP3371860A1 (en
Inventor
Thomas Gottschalk
Dietmar Duerr
Tobias Kerschensteiner
Edmund ZÄUNER
Stefan SCHÖN
Manuel Scharf
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Dehn SE and Co KG
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Dehn and Soehne GmbH and Co KG
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    • 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
    • H01T—SPARK GAPS; OVERVOLTAGE ARRESTERS USING SPARK GAPS; SPARKING PLUGS; CORONA DEVICES; GENERATING IONS TO BE INTRODUCED INTO NON-ENCLOSED GASES
    • H01T15/00—Circuits specially adapted for spark gaps, e.g. ignition circuits
    • 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
    • H01T4/00—Overvoltage arresters using spark gaps
    • H01T4/10—Overvoltage arresters using spark gaps having a single gap or a plurality of gaps in parallel

Definitions

  • the invention relates to an overvoltage protection device for electrical terminals which, in addition to an at least one-phase network connection, have at least one control signal connection, wherein a change in the operating state of the respective terminal can be specified via the control signal connection.
  • a surge arrester arrangement for terminal devices is previously known, with specific reference being made there to LED lights in street lighting. Accordingly, after the DE 20 2011 051 074 U1 Surge arresters are used to protect LED lights for street lighting from voltage peaks from the street lighting network, which are caused by ballasts, for example. In such known surge arresters, an electrical functional unit is used to divert an overvoltage, for example to a neutral conductor. Since the surge arresters have to be disconnected during maintenance work, installation in a lamp head is not practical and installation in a fuse box is preferable, as is the case with the DE 20 2011 051 074 U1 shows.
  • the surge arrester there has an insulating component, by means of which the actual functional unit for surge protection is electrically isolated at least in sections.
  • the surge arrester itself is completely dimensioned so that it can be arranged within the populated street lighting fuse boxes.
  • the aforementioned insulating component is intended to completely electrically isolate the functional unit of the surge arrester and, at the same time, to stabilize it mechanically.
  • the electrical functional unit is at least partially cast in an insulating material.
  • a plastic in particular a synthetic resin.
  • the final shape of the Surge arrester determined by the mold. The final shape of the surge arrester should be adapted to the conditions in a special type of fuse box.
  • a marker in particular a foil marker, is used to signal the state of the surge arrester, which visually shows the user that the temperature has been exceeded and thus that the surge arrester has been destroyed.
  • overvoltage protection device for electrical terminal devices, the issue here being terminal devices which in addition to an at least one-phase network connection also have a control signal connection. It has shown that overvoltage protection is only inadequate in the area of the grid connection, since impermissible voltage loads can also be coupled in or entered via a control line, with the result that the functionality of a corresponding terminal device can be restricted or it can be completely destroyed.
  • the overvoltage protection device for electrical end devices which, in addition to an at least one-phase network connection, have at least one control signal connection, wherein a change in the operating state of the respective end device can be specified via the control signal connection, is implemented in such a way that initially an arrangement of overvoltage arresters, in particular varistors, is provided, each of which is assigned a thermal separation device and an optical function display.
  • the thermal disconnection device is designed so that if the surge arrester used, in particular a varistor, is overloaded, electrical disconnection takes place in the sense of triggering a fuse.
  • the overvoltage protection device is designed in the immediate vicinity of the electrical terminal, in particular in a connection box of the same.
  • the overvoltage protection device is located within an electrically conductive mast, with the gas discharge tube being connected between the network connection and the conductive mast when it is fed from a TNC network with a PEN conductor, which is at the same time a protective conductor and neutral conductor.
  • the above measures ensure that no contact voltage problems occur, even in the case of network outflows and poor earthing conditions, thus ensuring the necessary personal safety.
  • the respective optical function display has a series connection of a first resistor and a light-emitting diode, this series connection being arranged in parallel to the thermal separation device.
  • the series circuit also includes a second resistor which is connected to the neutral conductor.
  • the overvoltage protection device according to the invention is designed to be exchangeable. This means that if the device is destroyed as a result of an overvoltage event, it can be exchanged if necessary and replaced by a functional device.
  • the overvoltage protection device has connection cables for detachable connection to known terminals, these connection cables being led out on a preferred side of a housing, the housing enclosing all relevant electrical components of the overvoltage protection device in an insulating manner.
  • the overvoltage protection device can have an integrated overcurrent fuse in the grid connection path.
  • optical function displays are designed in such a way that they are suitable for separate signaling of overvoltage events of the network connection or the control signal connection.
  • the overvoltage protection device assumes a single-phase low-voltage grid connection L.
  • the connection L 'leads to the consumer, for example to a mobile radio station, a lamp arrangement in a street lighting system or the like.
  • Another input Lsteu represents a control input for switching street lighting on and off, for example.
  • N is the neutral conductor input and PE is the protective conductor input.
  • a surge arrester designed as a varistor V, which has a thermal disconnection device ATV, is connected to the network connection L, connected between L and N.
  • the thermal disconnection device is opened in the event of an overload, this overload leading to such heating of the varistor V that, for example, a material connection, ie a solder, melts and a correspondingly spring-loaded bracket moves from a closed to an open position (not shown). .
  • a series circuit comprising a resistor R1 and a light-emitting diode D is located parallel to the thermal separation device ATV.
  • This series circuit also includes a resistor R2 which is connected to the neutral conductor N.
  • a further diode DAP is connected in anti-parallel to the light-emitting diode D.
  • the display devices With the aid of the LEDs D in the protective circuit of the network connection LL 'and in the protective circuit of the control signal connection Lsteu or Lst, error states and overvoltage events can be signaled separately.
  • the Fig. 2 shows, all relevant electrical components of the overvoltage protection device are in accordance with the circuit diagram Fig. 1 arranged on a printed circuit board LP.
  • the circuit board LP comprises the varistors V with a correspondingly integrated thermal disconnection device ATV, the light-emitting diodes D and the gas discharge tube G and the corresponding resistors R1 and R2.
  • the corresponding connections in the form of connection cables AK are routed from the printed circuit board.
  • the corresponding prefabricated assembly according to Fig. 3 is surrounded by a compact housing KG, the housing KG having openings or breakthroughs DB so that the corresponding states of the light-emitting diodes D can be recognized.
  • FIG. 4 An exemplary arrangement of a compactly designed overvoltage protection device KÜG within a connection box HAK shows Fig. 4 , whereby screw fuses Si known per se can still be accommodated in the connection box HAK.
  • connection cables AK With the help of the connection cables AK there is the possibility of simply plugging the correspondingly stripped ends of these connection cables AK into known spring terminals in order to produce the desired electrical connections
  • Fig. 5 and 6th show the basic possibilities of electrical connection of the overvoltage protection device KÜG with the overvoltage protection means SPD contained therein, which are only shown symbolically in the respective block diagram and without the optical function display.
  • a mast connection is also established between the PE connection and the KÜG overvoltage protection device.
  • overvoltage protection device KÜG When the overvoltage protection device KÜG is arranged in a TT network, master grounding is assumed, with the PE connection of the overvoltage protection device KÜG being connected to the electrically conductive mast, as is also the case with the design for a TNC network according to Fig. 6 the case is.

Description

Die Erfindung betrifft eine Überspannungsschutzeinrichtung für elektrische Endgeräte, welche neben einer mindestens einphasigen Netzanbindung über mindestens einen Steuersignalanschluss verfügen, wobei über den Steuersignalanschluss eine Änderung des Betriebszustands des jeweiligen Endgeräts vorgebbar ist.The invention relates to an overvoltage protection device for electrical terminals which, in addition to an at least one-phase network connection, have at least one control signal connection, wherein a change in the operating state of the respective terminal can be specified via the control signal connection.

Aus der DE 20 2011 051 074 U1 ist eine Überspannungsabteiteranordnung für Endgeräte vorbekannt, wobei dort konkret auf LED-Leuchten in Straßenbeleuchtungen Bezug genommen wird. Demnach werden nach der DE 20 2011 051 074 U1 Überspannungsableiter eingesetzt, um LED-Leuchten für die Straßenbeleuchtung vor Spannungsspitzen aus dem Straßenbeleuchtungsnetz, die z.B. durch Vorschaltgeräte entstehen, zu schützen. Bei derartigen bekannten Überspannungsableitern dient eine elektrische Funktionseinheit der Ableitung einer Überspannung, beispielsweise an einen Nullleiter. Da die Überspannungsableiter bei Wartungsarbeiten abgeklemmt werden müssen, ist der Einbau in einen Leuchtenkopf nicht zweckmäßig und insofern der Einbau in einen Sicherungskasten zu bevorzugen, wie es die DE 20 2011 051 074 U1 zeigt. Der dortige Überspannungsableiter weist eine Isolierkomponente auf, durch welche die eigentliche Funktionseinheit zum Überspannungsschutz zumindest abschnittsweise elektrisch isoliert ist. Der Überspannungsableiter selbst ist vollständig innerhalb bestückter Straßenbeleuchtungs-Sicherungskästen anordenbar dimensioniert.From the DE 20 2011 051 074 U1 a surge arrester arrangement for terminal devices is previously known, with specific reference being made there to LED lights in street lighting. Accordingly, after the DE 20 2011 051 074 U1 Surge arresters are used to protect LED lights for street lighting from voltage peaks from the street lighting network, which are caused by ballasts, for example. In such known surge arresters, an electrical functional unit is used to divert an overvoltage, for example to a neutral conductor. Since the surge arresters have to be disconnected during maintenance work, installation in a lamp head is not practical and installation in a fuse box is preferable, as is the case with the DE 20 2011 051 074 U1 shows. The surge arrester there has an insulating component, by means of which the actual functional unit for surge protection is electrically isolated at least in sections. The surge arrester itself is completely dimensioned so that it can be arranged within the populated street lighting fuse boxes.

Die vorerwähnte Isolierkomponente soll bei einer Ausführungsform die Funktionseinheit des Überspannungsableiters vollständig elektrisch isolieren und gleichzeitig mechanisch stabilisieren. Gemäß einer dortigen vorteilhaften Ausgestaltung ist die elektrische Funktionseinheit zumindest teilweise in ein isolierendes Material eingegossen. Diesbezüglich wird auf einen Kunststoff, insbesondere ein Kunstharz verwiesen. Auch wird die endgültige Form des Überspannungsableiters durch die Gussform bestimmt. Dabei soll die endgültige Form des Überspannungsableiters an die Gegebenheiten in einem speziellen Typ von Sicherungskästen angepasst werden. Zur Zustandssignalisierung des Überspannungsableiters kommt ein Marker, insbesondere ein Folienmarker zum Einsatz, der dem Benutzer eine Temperaturüberschreitung und damit eine Zerstörung des Überspannungsableiters visuell darstellt. Verwiesen wird insofern auf einen Marker, der bei Temperaturüberschreitung die Farbe ändert, oder einen Marker, der bei Temperaturüberschreitung eine Änderung der Reflexionseigenschaften aufweist. Zum Erkennen des Zustands des Überspannungsableiters ist dafür Sorge getragen, den Marker in direkten thermischen Kontakt mit einem Varistor zu bringen.In one embodiment, the aforementioned insulating component is intended to completely electrically isolate the functional unit of the surge arrester and, at the same time, to stabilize it mechanically. According to an advantageous embodiment there, the electrical functional unit is at least partially cast in an insulating material. In this regard, reference is made to a plastic, in particular a synthetic resin. Also the final shape of the Surge arrester determined by the mold. The final shape of the surge arrester should be adapted to the conditions in a special type of fuse box. A marker, in particular a foil marker, is used to signal the state of the surge arrester, which visually shows the user that the temperature has been exceeded and thus that the surge arrester has been destroyed. In this respect, reference is made to a marker that changes color when the temperature is exceeded, or a marker that changes its reflective properties when the temperature is exceeded. To identify the state of the surge arrester, care must be taken to bring the marker into direct thermal contact with a varistor.

Aus der Veröffentlichung OBO-Bettermann, Lightning and surge protection for LED lighting, 08/2014, ist es bekannt, eine kompakte Überspannungsschutz-Baugruppe in einen Sicherungsanschlusskasten innerhalb eines Straßenbeleuchtungsmastes zu integrieren. Ein mehrstufiger Schutz von LED-Straßenbeleuchtungen wird dadurch bewirkt, dass im Lampenkopf vor dem LED-Treiber ein Typ 2-Ableiter befindlich ist. Im Anschlussbereich innerhalb des Mastes befindet sich dann ein Kombinationsabteiler vom Typ 1 und 2. In Verteilerkästen können weitere Ableiter vom Typ 1 und 2 vorgesehen sein. Mit einer solchen mehrstufigen Überspannungsschutzeinrichtung sollen Schäden an den eigentlichen Leuchtmitteln, d.h. den LEDs, aber auch an den Treiberschaltungen vermieden werden. Weiterhin weisen die in der vorstehend erwähnten Veröffentlichung gezeigten Überspannungsschutzableiter eine Anzeigeeinheit in Form einer lichtemittierenden Diode auf, die einen ordnungsgemäßen Funktionszustand signalisiert.From the publication OBO-Bettermann, Lightning and surge protection for LED lighting, 08/2014, it is known to integrate a compact surge protection assembly into a fuse connection box within a street lighting mast. A multi-level protection of LED street lights is achieved by the fact that a type 2 arrester is located in the lamp head in front of the LED driver. A combination divider of type 1 and 2 is then located in the connection area within the mast. Further arresters of type 1 and 2 can be provided in distribution boxes. With such a multi-stage overvoltage protection device, damage to the actual lighting means, i.e. the LEDs, but also to the driver circuits, should be avoided. Furthermore, the surge arresters shown in the above-mentioned publication have a display unit in the form of a light-emitting diode, which signals a proper functional state.

Zum Stand der Technik sei noch auf festverdrahtete Überspannungsschutzgeräte bevorzugt zum Schutz von einphasig versorgten Endgeräten, beispielsweise auf den Überspannungsschutz vom Typ MLPC1-230L-V der Citel Electronics GmbH aufmerksam gemacht. Der dort gezeigte Überspannungsschutz ist auch für Endstromkreise einer LED-Beleuchtung geeignet Weitere Überspannungsschutzeinrichtungen sind aus der Druckschriften US 4 866 560 A und US 2005 280971 A1 bekannt.Concerning the state of the art, attention should also be drawn to hard-wired surge protection devices, preferably for the protection of single-phase supplied end devices, for example the surge protection of the type MLPC1-230L-V from Citel Electronics GmbH. The overvoltage protection shown there is also suitable for final circuits of LED lighting. Further overvoltage protection devices can be found in the publications U.S. 4,866,560 A and US 2005 280971 A1 known.

Aus dem Vorgenannten ist es Aufgabe der Erfindung, eine neuentwickelte Überspannungsschutzeinrichtung für elektrische Endgeräte anzugeben, wobei es hier um Endgeräte geht, die neben einer mindestens einphasigen Netzanbindung auch noch einen Steuersignalanschluss aufweisen. Es hat sich gezeigt, dass ein Überspannungsschutz ausschließlich im Bereich der Netzanbindung unzureichend ist, da unzulässige Spannungsbelastungen auch über eine Steuerleitung eingekoppelt bzw. eingetragen werden können, mit der Folge einer Einschränkung der Funktionsfähigkeit eines entsprechenden Endgeräts bis hin zur vollständigen Zerstörung desselben.From the above, it is the object of the invention to provide a newly developed overvoltage protection device for electrical terminal devices, the issue here being terminal devices which in addition to an at least one-phase network connection also have a control signal connection. It has shown that overvoltage protection is only inadequate in the area of the grid connection, since impermissible voltage loads can also be coupled in or entered via a control line, with the result that the functionality of a corresponding terminal device can be restricted or it can be completely destroyed.

Die Lösung der Aufgabe der Erfindung erfolgt durch die Lehre gemäß der Merkmalskombination nach Anspruch 1, wobei die Unteransprüche mindestens zweckmäßige Ausgestaltungen und Weiterbildungen umfassen.The object of the invention is achieved by the teaching according to the combination of features according to claim 1, the subclaims comprising at least useful configurations and developments.

Die erfindungsgemäße Überspannungsschutzeinrichtung für elektrische Endgeräte, die neben einer mindestens einphasigen Netzanbindung über mindestens einen Steuersignalanschluss verfügen, wobei über den Steuersignalanschluss eine Änderung des Betriebszustands des jeweiligen Endgeräts vorgebbar ist, wird so realisiert, dass zunächst eine Anordnung von Überspannungsableitern, insbesondere Varistoren, vorgesehen ist, denen jeweils eine thermische Abtrennvorrichtung und eine optische Funktionsanzeige zugeordnet wird. Die thermische Abtrennvorrichtung ist so ausgebildet, dass bei einer Überlastung des jeweils eingesetzten Überspannungsableiters, insbesondere Varistors, eine elektrische Trennung im Sinne des Auslösens einer Sicherung erfolgt.The overvoltage protection device according to the invention for electrical end devices which, in addition to an at least one-phase network connection, have at least one control signal connection, wherein a change in the operating state of the respective end device can be specified via the control signal connection, is implemented in such a way that initially an arrangement of overvoltage arresters, in particular varistors, is provided, each of which is assigned a thermal separation device and an optical function display. The thermal disconnection device is designed so that if the surge arrester used, in particular a varistor, is overloaded, electrical disconnection takes place in the sense of triggering a fuse.

Weiterhin ist mindestens ein Gasableiter vorhanden, der zwischen der Netzanbindung und einem Schutzleiter geschaltet ist. Weiterhin ist ein erster Varistor mit thermischer Abtrennvorrichtung zwischen der Netzanbindung und einem Neutralleiter und ein zweiter Varistor mit thermischer Abtrennvorrichtung zwischen dem Steuersignalanschluss und dem Neutralleiter angeordnet. Darüber hinaus ist die erfindungsgemäße Überspannungsschutzeinrichtung in unmittelbarer Nähe des elektrischen Endgeräts, insbesondere in einem Anschlusskasten desselben ausgebildet.There is also at least one gas discharge tube that is connected between the network connection and a protective conductor. Furthermore, a first varistor with a thermal disconnection device is arranged between the network connection and a neutral conductor and a second varistor with a thermal disconnection device is arranged between the control signal connection and the neutral conductor. In addition, the overvoltage protection device according to the invention is designed in the immediate vicinity of the electrical terminal, in particular in a connection box of the same.

Gemäß der Erfindung ist die Überspannungsschutzeinrichtung innerhalb eines elektrisch leitfähigen Masten befindlich, wobei bei einer Speisung aus einem TNC-Netz mit einem PEN-Leiter, der gleichzeitig Schutzleiter und Neutralleiter ist, der Gasableiter zwischen der Netzanbindung und dem leitfähigen Mast geschaltet ist.According to the invention, the overvoltage protection device is located within an electrically conductive mast, with the gas discharge tube being connected between the network connection and the conductive mast when it is fed from a TNC network with a PEN conductor, which is at the same time a protective conductor and neutral conductor.

Mit den vorstehenden Maßnahmen wird auch bei Netzausläufern und schlechten Erdungsverhältnissen sichergestellt, dass keine Berührungsspannungsprobleme auftreten und somit die erforderliche Personensicherheit gewährleistet ist.The above measures ensure that no contact voltage problems occur, even in the case of network outflows and poor earthing conditions, thus ensuring the necessary personal safety.

Die jeweilige optische Funktionsanzeige weist gemäß einer Ausführungsform der Erfindung eine Reihenschaltung eines ersten Widerstands und einer lichtemittierenden Diode auf, wobei diese Reihenschaltung parallel zur thermischen Abtrennvorrichtung angeordnet ist. Weiterhin umfasst die Reihenschaltung einen zweiten Widerstand, welcher mit dem Neutralleiter in Verbindung steht.According to one embodiment of the invention, the respective optical function display has a series connection of a first resistor and a light-emitting diode, this series connection being arranged in parallel to the thermal separation device. The series circuit also includes a second resistor which is connected to the neutral conductor.

Die Überspannungsschutzeinrichtung gemäß der Erfindung ist auswechselbar ausgebildet. Das heißt, bei einer Zerstörung der Einrichtung infolge eines Überspannungsereignisses kann diese im Bedarfsfall ausgetauscht und durch eine funktionstüchtige Einrichtung ersetzt werden.The overvoltage protection device according to the invention is designed to be exchangeable. This means that if the device is destroyed as a result of an overvoltage event, it can be exchanged if necessary and replaced by a functional device.

Zum Zweck des schnellen Auswechselns weist die Überspannungsschutzeinrichtung Anschlusskabel zum lösbaren Verbinden mit an sich bekannten Klemmen auf, wobei diese Anschlusskabel an einer Vorzugsseite eines Gehäuses herausgeführt sind, wobei das Gehäuse alle relevanten elektrischen Komponenten der Überspannungsschutzeinrichtung isolierend umschließt. Zusätzlich kann die Überspannungsschutzeinrichtung über eine integrierte Überstromsicherung im Netzanbindungspfad verfügen.For the purpose of quick replacement, the overvoltage protection device has connection cables for detachable connection to known terminals, these connection cables being led out on a preferred side of a housing, the housing enclosing all relevant electrical components of the overvoltage protection device in an insulating manner. In addition, the overvoltage protection device can have an integrated overcurrent fuse in the grid connection path.

Die optischen Funktionsanzeigen sind so ausgebildet, dass diese für eine separate Signalisierung von Überspannungsereignissen der Netzanbindung oder des Steuersignalanschlusses geeignet sind.The optical function displays are designed in such a way that they are suitable for separate signaling of overvoltage events of the network connection or the control signal connection.

Die Erfindung soll nachstehend anhand eines Ausführungsbeispiels sowie unter Zuhilfenahme von Figuren näher erläutert werden.The invention is to be explained in more detail below using an exemplary embodiment and with the aid of figures.

Hierbei zeigen:Here show:

Fig. 1Fig. 1
ein Schaltbild der Überspannungsschutzeinrichtung für Endgeräte mit einphasiger Niederspannungs-Netzanbindung;a circuit diagram of the overvoltage protection device for end devices with single-phase low-voltage network connection;
Fig. 2Fig. 2
eine Realisierungsform der Überspannungsschutzeinrichtung mit den erforderlichen elektronischen Komponenten, die sich auf einer Leiterplatte befinden, nebst Anschlussdrähten;a form of implementation of the overvoltage protection device with the necessary electronic components, which are located on a circuit board, together with connecting wires;
Fig. 3Fig. 3
eine Darstellung ähnlich derjenigen nach Fig. 2, jedoch mit einem isolierenden Gehäuse und den an einer Vorzugsseite des Gehäuses herausgeführten Anschlusskabeln;a representation similar to that after Fig. 2 , but with an insulating housing and the connection cables led out on a preferred side of the housing;
Fig. 4Fig. 4
eine prinzipielle Möglichkeit der Anordnung der Überspannungsschutzeinrichtung in einem an sich bekannten, genormten Anschlusskasten;a basic possibility of arranging the overvoltage protection device in a known, standardized junction box;
Fig. 5Fig. 5
ein Blockschaltbild der Anordnung der Überspannungsschutzeinrichtung in oder an einem leitfähigen Objekt, insbesondere einem Mast, mit angedeuteter elektrischer Verbindung zum nicht näher dargestellten Verbraucher nebst niederspannungsseitiger Anbindung in einem TNS-Netz mit vier Anschlüssen einschließlich Steuerleitung Lst und einer Erdverbindung zwischen dem PE-Anschluss der Überspannungsschutzeinrichtung und dem Mast;a block diagram of the arrangement of the overvoltage protection device in or on a conductive object, in particular a mast, with an indicated electrical connection to the consumer, not shown in detail, as well as a low-voltage connection in a TNS network with four connections including control line Lst and a ground connection between the PE connection of the overvoltage protection device and the mast;
Fig. 6Fig. 6
eine Darstellung ähnlich derjenigen nach Fig. 5, jedoch für ein TNC-Netz mit einem PEN-Leiter, der gleichzeitig Schutzleiter PE und Neutralleiter N ist, wiederum mit einer Erdverbindung zwischen der Überspannungsschutzeinrichtung und einem Mast als beispielhaften elektrisch leitfähigen Objekt unda representation similar to that after Fig. 5 , but for a TNC network with a PEN conductor that simultaneously has PE and Neutral conductor N is, again with a ground connection between the overvoltage protection device and a mast as an exemplary electrically conductive object and
Fig. 7Fig. 7
eine Darstellung ähnlich derjenigen nach den Fig. 5 und 6, jedoch in einer Verschaltung bei einem TT-Netz und einer Erdverbindung des leitfähigen Objekts.a representation similar to that after Fig. 5 and 6th , but in an interconnection with a TT network and an earth connection of the conductive object.

Die Überspannungsschutzeinrichtung gemäß dem Schaltbild nach Fig. 1 geht von einer einphasigen Niederspannungs-Netzanbindung L aus. Der Anschluss L' führt zum Verbraucher, beispielsweise zu einer Mobilfunkstation, einer Leuchtmittelanordnung in einer Straßenbeleuchtung oder dergleichen. Ein weiterer Eingang Lsteu stellt einen Steuereingang zum beispielsweisen Ein- und Ausschalten einer Straßenbeleuchtung dar.The overvoltage protection device according to the circuit diagram Fig. 1 assumes a single-phase low-voltage grid connection L. The connection L 'leads to the consumer, for example to a mobile radio station, a lamp arrangement in a street lighting system or the like. Another input Lsteu represents a control input for switching street lighting on and off, for example.

Mit N ist der Neutralleiter- und PE der Schutzleitereingang bezeichnet. An der Netzanbindung L, geschaltet zwischen L und N, liegt ein Überspannungsableiter, ausgebildet als Varistor V an, der über eine thermische Abtrennvorrichtung ATV verfügt. Die thermische Abtrennvorrichtung wird bei einer Überlast geöffnet, wobei diese Überlast zu einer solchen Erwärmung des Varistors V führt, dass z.B. eine stoffschlüssige Verbindung, d.h. ein Lot schmilzt und ein entsprechend federbelasteter Bügel von einer geschlossenen in eine offene, d.h. Abtrennposition gelangt (nicht gezeigt).N is the neutral conductor input and PE is the protective conductor input. A surge arrester, designed as a varistor V, which has a thermal disconnection device ATV, is connected to the network connection L, connected between L and N. The thermal disconnection device is opened in the event of an overload, this overload leading to such heating of the varistor V that, for example, a material connection, ie a solder, melts and a correspondingly spring-loaded bracket moves from a closed to an open position (not shown). .

Parallel zur thermischen Abtrennvorrichtung ATV befindet sich eine Reihenschaltung aus einem Widerstand R1 und einer lichtemittierenden Diode D. Diese Reihenschaltung umfasst weiterhin einen Widerstand R2, der am Neutralleiter N angeschlossen ist. Der lichtemittierenden Diode D ist eine weitere Diode DAP antiparallel geschalten.A series circuit comprising a resistor R1 and a light-emitting diode D is located parallel to the thermal separation device ATV. This series circuit also includes a resistor R2 which is connected to the neutral conductor N. A further diode DAP is connected in anti-parallel to the light-emitting diode D.

Eine vergleichbare Anordnung findet sich zum Schutz des Steuersignalanschlusses Lsteu. Weiterhin ist zwischen N und PE ein Gasableiter G vorhanden.A comparable arrangement can be found for protecting the control signal connection Lsteu. There is also a gas discharge tube G between N and PE.

Durch die Anzeigeeinrichtungen mit Hilfe der LEDs D im Schutzkreis der Netzanbindung LL' und im Schutzkreis des Steuersignalanschlusses Lsteu bzw. Lst sind Fehlerzustände und Überspannungsereignisse getrennt signalisierbar. Wie die Fig. 2 zeigt, sind alle relevanten elektrischen Komponenten der Überspannungsschutzeinrichtung gemäß Schaltbild nach Fig. 1 auf einer Leiterplatte LP angeordnet. Insbesondere umfasst die Leiterplatte LP die Varistoren V mit entsprechend integrierter thermischer Abtrennvorrichtung ATV, die lichtemittierenden Dioden D sowie den Gasableiter G und die entsprechenden Widerstände R1 und R2. Darüber hinaus sind von der Leiterplatte die entsprechenden Anschlüsse in Form von Anschlusskabeln AK geführt.By means of the display devices with the aid of the LEDs D in the protective circuit of the network connection LL 'and in the protective circuit of the control signal connection Lsteu or Lst, error states and overvoltage events can be signaled separately. As the Fig. 2 shows, all relevant electrical components of the overvoltage protection device are in accordance with the circuit diagram Fig. 1 arranged on a printed circuit board LP. In particular, the circuit board LP comprises the varistors V with a correspondingly integrated thermal disconnection device ATV, the light-emitting diodes D and the gas discharge tube G and the corresponding resistors R1 and R2. In addition, the corresponding connections in the form of connection cables AK are routed from the printed circuit board.

Die entsprechend vorgefertigte Baugruppe gemäß Fig. 3 ist von einem kompakten Gehäuse KG umgeben, wobei das Gehäuse KG Öffnungen oder Durchbrüche DB aufweist, so dass die entsprechenden Zustände der lichtemittierenden Dioden D erkennbar sind.The corresponding prefabricated assembly according to Fig. 3 is surrounded by a compact housing KG, the housing KG having openings or breakthroughs DB so that the corresponding states of the light-emitting diodes D can be recognized.

Eine beispielhafte Anordnung einer kompakt ausgebildeten Überspannungsschutzeinrichtung KÜG innerhalb eines Anschlusskastens HAK zeigt die Fig. 4, wobei im Anschlusskasten HAK noch an sich bekannte Schraubsicherungen Si untergebracht sein können.An exemplary arrangement of a compactly designed overvoltage protection device KÜG within a connection box HAK shows Fig. 4 , whereby screw fuses Si known per se can still be accommodated in the connection box HAK.

Mit Hilfe der Anschlusskabel AK besteht die Möglichkeit, die entsprechend abisolierten Enden dieser Anschlusskabel AK in bekannte Federklemmen in einfacher Weise einzustecken, um die gewünschten elektrischen Verbindungen herzustellenWith the help of the connection cables AK there is the possibility of simply plugging the correspondingly stripped ends of these connection cables AK into known spring terminals in order to produce the desired electrical connections

Die Fig. 5 und 6 zeigen prinzipielle Möglichkeiten des elektrischen Anschlusses der Überspannungsschutzeinrichtung KÜG mit den dort enthaltenen Überspannungsschutzmitteln SPD, welche im jeweiligen Blockschaltbild nur symbolisch und ohne die optische Funktionsanzeige dargestellt wurden.The Fig. 5 and 6th show the basic possibilities of electrical connection of the overvoltage protection device KÜG with the overvoltage protection means SPD contained therein, which are only shown symbolically in the respective block diagram and without the optical function display.

Gemäß Fig. 5 wird bei einer Anwendung in einem TNS-Netz zwischen dem PE-Anschluss und der Überspannungsschutzeinrichtung KÜG noch eine Mastverbindung hergestellt.According to Fig. 5 If used in a TNS network, a mast connection is also established between the PE connection and the KÜG overvoltage protection device.

Bei einem TNC-Netz gemäß Fig. 6 mit kombiniertem Schutz- und Neutralleiter PEN liegt quasi eine Auftrennung vor. Die Ausgangsseite des Gasableiters G innerhalb der Überspannungsschutzeinrichtung KÜG bildet einen Potentialausgleich PA durch eine entsprechende Verbindung zum elektrisch leitfähigen Mast.For a TNC network according to Fig. 6 With a combined protective and neutral conductor PEN, there is a kind of separation. The output side of the gas arrester G within the overvoltage protection device KÜG forms a potential equalization PA through a corresponding connection to the electrically conductive mast.

Bei einer Anordnung der Überspannungsschutzeinrichtung KÜG in einem TT-Netz wird von einer Masterdung ausgegangen, wobei der PE-Anschluss der Überspannungsschutzeinrichtung KÜG mit dem elektrisch leitfähigen Mast in Verbindung steht, wie dies auch bei der Ausführung für ein TNC-Netz nach Fig. 6 der Fall ist.When the overvoltage protection device KÜG is arranged in a TT network, master grounding is assumed, with the PE connection of the overvoltage protection device KÜG being connected to the electrically conductive mast, as is also the case with the design for a TNC network according to Fig. 6 the case is.

Claims (5)

  1. An overvoltage protection device for electrical terminal devices which, in addition to an at least single-phase low-voltage supply system connection (L), have at least one control signal connection (Lst) for switching a lamp arrangement in a street lighting system on and off, wherein a change in the operating state of the respective terminal device or of a consumer can be specified by means of the control signal connection (Lst), consisting of an arrangement of varistors (V) which are each assigned a thermal disconnecting device (ATV) and an optical function display (D), and having at least one gas discharge tube (G) which is connected between a neutral conductor (N) and a protective earth conductor (PE), wherein furthermore a first varistor (V) with a thermal disconnecting device (ATV) is provided between the power supply system connection (L) and a neutral conductor (N) and a second varistor (V) with a thermal disconnecting device (ATV) is provided between the control signal connection (Lst) and the neutral conductor (N), wherein the overvoltage protection device (KÜG) is adapted to be arranged in the immediate vicinity of the electrical terminal device or consumer in a terminal box (HAK) which is located within a conductive pole, wherein the optical function displays (D) are provided for a separate signaling of overvoltage events of the power supply system connection (L) and of the control signal connection (Lst), wherein in the case of a power supply from a TNC power system with a PEN conductor, which is at the same time a protective earth conductor (PE) and a neutral conductor (N), the gas discharge tube (G) is connected between the PEN conductor and the conductive pole to form a potential equalization.
  2. The overvoltage protection device according to claim 1,
    characterized in that
    the respective optical function display (D) includes a series connection of a first resistor (R1) and an LED (D) which is arranged in parallel to the thermal disconnecting device (ATV), the series connection including a second resistor (R2) which is connected to the neutral conductor (N).
  3. The overvoltage protection device according to claim 2,
    characterized in that
    it includes connecting cables (AK) for a detachable connection to terminals known per se, wherein the connecting cables (AK) are all led through at a preferred side of a housing (KG) which insulatingly accommodates the electrical components (SPD) of the device.
  4. The overvoltage protection device according to any of the preceding claims,
    characterized in that
    it includes at least one overcurrent protection fuse in the power supply system connection path.
  5. The overvoltage protection device according to claim 2,
    characterized in that
    a diode (DAP) is connected antiparallel to the respective LED (D).
EP16787430.4A 2015-11-03 2016-10-25 Overvoltage protection device for electrical terminal devices Active EP3371860B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102015014162.7A DE102015014162A1 (en) 2015-11-03 2015-11-03 Overvoltage protection device for electrical terminals
PCT/EP2016/075667 WO2017076692A1 (en) 2015-11-03 2016-10-25 Overvoltage protection device for electrical terminal devices

Publications (2)

Publication Number Publication Date
EP3371860A1 EP3371860A1 (en) 2018-09-12
EP3371860B1 true EP3371860B1 (en) 2021-04-07

Family

ID=57206275

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Application Number Title Priority Date Filing Date
EP16787430.4A Active EP3371860B1 (en) 2015-11-03 2016-10-25 Overvoltage protection device for electrical terminal devices

Country Status (3)

Country Link
EP (1) EP3371860B1 (en)
DE (1) DE102015014162A1 (en)
WO (1) WO2017076692A1 (en)

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4866560A (en) * 1988-04-22 1989-09-12 Allina Edward F Safeguarding electrical transient surge protection
DE4124321C2 (en) * 1991-07-23 2003-10-09 Dehn & Soehne Arrangement for the derivation of overvoltages
AT404650B (en) * 1996-05-07 1999-01-25 Felten & Guilleaume Ag Oester ISOLATING DEVICE FOR OVERVOLTAGE PROTECTION CIRCUIT
FR2871932B1 (en) * 2004-06-18 2006-08-04 Schneider Electric Ind Sas OVERVOLTAGE PROTECTION DEVICE
EP2732525B1 (en) * 2011-07-13 2016-04-20 Koninklijke Philips N.V. Surge protection device
DE202011051074U1 (en) 2011-08-24 2011-11-16 Tyco Electronics Raychem Gmbh Surge arrester for street lighting LED lights, street lighting fuse box with LED lightning arrester and street lighting fuse box retrofit kit comprising a surge arrester for LED lights
CN202616768U (en) * 2012-06-07 2012-12-19 厦门赛尔特电子有限公司 SPD (surge protection device) of LED (light emitting diode) illumination power supply
CN203761658U (en) * 2014-03-31 2014-08-06 厦门赛尔特电子有限公司 Optical controller with surge protecting function

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

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Publication number Publication date
DE102015014162A1 (en) 2017-05-04
WO2017076692A1 (en) 2017-05-11
EP3371860A1 (en) 2018-09-12

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