EP2274760B1 - Electrical circuit having a means for signaling - Google Patents

Electrical circuit having a means for signaling Download PDF

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Publication number
EP2274760B1
EP2274760B1 EP09730964.5A EP09730964A EP2274760B1 EP 2274760 B1 EP2274760 B1 EP 2274760B1 EP 09730964 A EP09730964 A EP 09730964A EP 2274760 B1 EP2274760 B1 EP 2274760B1
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EP
European Patent Office
Prior art keywords
signaling
electrical circuit
circuit according
electrical
functional state
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EP09730964.5A
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German (de)
French (fr)
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EP2274760A1 (en
Inventor
Norbert Kasper
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Weidmueller Interface GmbH and Co KG
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Weidmueller Interface GmbH and Co KG
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Priority to SI200931666A priority Critical patent/SI2274760T1/en
Publication of EP2274760A1 publication Critical patent/EP2274760A1/en
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    • 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
    • H01H71/04—Means for indicating condition of the switching device
    • 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
    • H01H71/04—Means for indicating condition of the switching device
    • H01H2071/042—Means for indicating condition of the switching device with different indications for different conditions, e.g. contact position, overload, short circuit or earth leakage

Definitions

  • the invention relates to an electrical circuit according to the preamble of claim 1.
  • Electrical systems such as electrical systems or electrical lines are, to ensure trouble-free operation, protected from interference events by protective devices against impairment of their function and / or against destruction.
  • the electrical circuits in question with a means for signaling signal at least one functional state, such as functional or defective, a protective device.
  • a functional state such as functional or defective
  • the functional state of a protective device to be monitored is directly perceptible via a signaling, for example via optical signaling.
  • a malfunction event is understood to mean an event by which electrical energy is applied to an electrical system in such a way that the electrical system is impaired or destroyed in its proper function.
  • interference events are lightning or static discharges as a result of overvoltage pulses and / or overcurrent pulses, for example, galvanic, inductive or capacitive, are coupled into the electrical system and impair or destroy its function.
  • Protection against over-voltage pulses have protective elements, u. For example, spark gaps, varistors, diodes, suppressor diodes, and are known in the art. Such protective devices are also referred to as OVP (over voltage protection).
  • an interference event in the context of the present invention is understood to mean an overcurrent with which an electrical system, for example an electrical line, can be overloaded and / or destroyed, for example, by a short circuit or ground fault.
  • Protective devices for protection against overcurrents are colloquially referred to as fuses and are the skilled person in various Versions, for example in the form of fuses or circuit breakers, known.
  • FIGS Fig. 3a and 3b Shown is a fuse connecting two electrical switching points. To signal a functional state of the fuse, this is connected in parallel to a series circuit of a series resistor and an opposite parallel connection of two LEDs. If the fuse is functional, the voltage prevailing between the two circuit points is too small to supply the LEDs with sufficient voltage to light up. If the fuse, for example, destroyed by a high current and therefore interrupts the flow of current, so the voltage between the two points and the LEDs are supplied with sufficient voltage to a functional state, here a defect in the fuse signaling. It is clear that depending on the type of voltage, DC or AC voltage only one or both LEDs light up.
  • a circuit according to the preamble of claim 1 is known from EP-A-1 628 317 known.
  • a disadvantage of the known circuits is that the means used for signaling, such as a light emitting diode, to maintain the signaling electrical energy and cause a retroactive effect on the function monitoring protective device and / or an electrical energy-providing device.
  • a signaling device which is pulse-activatable and bistable, has no circuit feedback after pulse activation and is designed for permanent, powerless signaling.
  • Fig. 1a shows a signaling device 1 with a, for example, held in a housing 2 housing 3.
  • the housing 3 is elongated and has at its upper end 4 a possibly transparent designed end 4a.
  • a signaling element 5 is slidably disposed within the housing 3.
  • the signaling element 5 is between a first position (which signals a first functional state) (as in FIG Fig. 1 a and 2a shown) and a - a second functional state signaling - second position (as in Fig. 1b and 2a represented) by a force element, for example by a spring 7 slidably.
  • the signaling means 1 further comprises a locking means 8 with a locking lug 8a, which first the signaling element 5 in the first position ( Fig. 1a and 2a ) arrested.
  • the detent lug 8a engages in a corresponding inner opening 8b of the signaling element 5.
  • a, for example, designed as an electromagnet 9 pull element is pulse-activated so the detent 8a is brought in a pulse activation of the electromagnet 9 out of engagement with the arranged on the inside of the signaling element 5 opening 8b. Due to the force of the spring 7, the signaling element 5 is moved from the first to the second position.
  • the pulse activation of the electromagnet 9 is effected by application of an electrical pulse, via electrical connection means, for example via the conductors 9a, 9b and the contact pins 9c, 9d.
  • signaling means 1 is configured only for optical signaling of a functional state.
  • the signaling element 5 is designed monochrome or multicolor and visible through the optically transparent executed end 4a of the housing 3 when it is in the second position ( Fig. 1b ).
  • the in Fig. 2a and 2b illustrated signaling element 5 means for electrical signaling, for example, the contact pins 10a and 10b and the contact connector 10c.
  • an opener is realized, wherein the opener opens when the signaling element 5 from the first position ( Fig. 2a ) into a second position ( Fig. 2b ) is moved.
  • the Fig. 2a and 2b Not shown means for pulse activation provided with reference numerals.
  • Fig. 3a and 3b show a known from the prior art monitoring a fuse 11 by means of anti-parallel light emitting diodes 12. The operation of this circuit has already been explained in the introduction to the description.
  • the light-emitting diode arrangement 12 known from the prior art is replaced by the signaling means 5 according to the invention.
  • the via the contact pins 9c, 9d (see Fig. 1a and 1b ) pulse activatable electromagnet 9 (see Fig. 1a and 1b ) in series with the opener formed by the means 10a, 10b and 10c (see Fig. 2a and 2b ).
  • the opening contact of the signaling means 5 opens as described above.
  • the current flow through the electromagnet is thereby interrupted, the electromagnet 9 is de-energized and thus does not absorb electrical power.
  • the signaling element 5 remains in the second position, as in FIG Fig. 4b shown (compare also Fig. 1b and 2 B ) and permanently signals the functional state of the protection device.
  • opening the opener see. FIGS. 2a and 2b , 10a, 10b and 10c
  • the galvanic connection between the circuit points 13 and 14 is interrupted, so that by the signaling element 5 has no effect on the circuit and the protection device to be monitored, here the fuse 11.
  • the signaling means 5 further comprises an unillustrated electrically operated restoring device with which the signaling element 5 can be reset from the second back to the first position, for example after a successful repair of a protective device to be monitored.
  • a protection device 15 for protecting electrical systems against overvoltages and the signaling device 5 according to the invention is shown.
  • spark gaps between two branches E1-A1 and E3-A3 and between two branches E2-A2 and E3-A3 lies in the entrance area of the protective device 15, both spark gaps being accommodated in a component designated FS in the present embodiment.
  • This part of the protection device is considered coarse protection denotes and "destroys" most of the injected by a disturbance event in the protection device 15 energy.
  • the remaining part of the protection device 15 is referred to as fine protection and serves primarily to limit the voltages occurring to a safe level for the electrical system to be protected.
  • An input terminal E1 is connected via a resistor R1 to an output terminal A1. Parallel to the output terminal A1 and to a lying on PE potential output terminal A3 is a series circuit of a suppressor diode SD1 and anti-parallel diodes D1 and D2. Accordingly, an input terminal E2 is connected via a resistor R2 to an output terminal A2, parallel to the output terminal A2 and lying at PE potential output terminal A3 is a series circuit of a suppressor diode SD2 and the antiparallel connected diodes D1 and D2.
  • An unillustrated electrical system to be protected against disturbance events for example a measuring amplifier or an industrial PC, is connected to the protective device 15 via the output terminals A1 to A3.
  • the input terminals E1-E3 are in turn connected to signal sources and / or to devices supplying electrical energy, for example an electrical supply network.
  • the installation and the interconnection of the protective device 15 and the electrical system to be protected takes place in such a way that, in the event of an interference event, coupled-in electrical energy is coupled in on the input side of the protective device 15. This is known to the person skilled in the art.
  • the circuit shown in the Fig. 5a and 5b also has a state recognition device 16 which monitors the protection device 15 and, in the event of a defect in the protection device 15, acts on the connected signaling device 5 with an electrical signal, for example in the form of an electrical pulse. By such a pulse, the signaling means 5 is activated, so that, as already stated, a permanent and powerless signaling of the functional state of the protective device 15 takes place. Furthermore, here also a non-reaction by the on hand Fig. 4a and 4b explained interconnections can be achieved with the realized by the means 10a, 10b and 10c opener (see. FIGS. 2a and 2b , 10a, 10b and 10c).
  • the signaling means 5 may additionally to the contact already described a further contact 17, for example, for retransmission of a functional state and a non-illustrated higher-level electrical system having.

Description

Die Erfindung betrifft eine elektrische Schaltung nach dem Oberbegriff des Anspruchs 1.The invention relates to an electrical circuit according to the preamble of claim 1.

Elektrische Systeme, beispielsweise elektrische Anlagen oder elektrische Leitungen, werden, zur Gewährleistung eines störungsfreien Betriebs, vor Störereignissen durch Schutzvorrichtungen gegen Beeinträchtigung ihrer Funktion und/oder vor Zerstörung geschützt.Electrical systems, such as electrical systems or electrical lines are, to ensure trouble-free operation, protected from interference events by protective devices against impairment of their function and / or against destruction.

Die in Rede stehenden elektrischen Schaltungen mit einem Mittel zur Signalisierung signalisieren wenigstens einen Funktionszustand, beispielsweise funktionsfähig oder defekt, einer Schutzvorrichtung. Auf diese Weise wird die Überprüfung und/oder Wartung von Schutzvorrichtungen erleichtert, da eine mit der Überwachung betraute Fachkraft keine Messungen an einer Schutzvorrichtung vornehmen muss um eine Aussage über deren Funktionszustand zu erhalten. Der Funktionszustand einer zu überwachenden Schutzvorrichtung ist über eine Signalisierung, beispielsweise über eine optische Signalisierung, unmittelbar wahrnehmbar.The electrical circuits in question with a means for signaling signal at least one functional state, such as functional or defective, a protective device. In this way, the review and / or maintenance of protective devices is facilitated because a person entrusted with the monitoring does not have to make measurements on a protective device to obtain a statement about their functional state. The functional state of a protective device to be monitored is directly perceptible via a signaling, for example via optical signaling.

Im Kontext der vorliegenden Offenbarung wird unter einem Störereignis ein Ereignis verstanden, durch dessen Auftreten ein elektrisches System mit elektrischer Energie beaufschlagt wird, und zwar derart, dass das elektrische System in seiner ordnungsgemäßen Funktion beeinträchtigt oder zerstört wird. Beispiele für Störereignisse sind Blitzeinschiäge oder statische Entladungen in deren Folge Überspannungsimpulse und/oder Überstromimpulse, beispielweise galvanisch, induktiv oder kapazitiv, in das elektrische System eingekoppelt werden und dieses in seiner Funktion beeinträchtigen oder zerstören. Schutzvorrichtungen gegen Überspannungsimpulse weisen Schutzelemente, u. A. beispielsweise Funkenstrecken, Varistoren, Dioden, Suppressordioden, auf und sind dem Fachmann bekannt. Derartige Schutzvorrichtungen werden auch als OVP (over voltage protection) bezeichnet.In the context of the present disclosure, a malfunction event is understood to mean an event by which electrical energy is applied to an electrical system in such a way that the electrical system is impaired or destroyed in its proper function. Examples of interference events are lightning or static discharges as a result of overvoltage pulses and / or overcurrent pulses, for example, galvanic, inductive or capacitive, are coupled into the electrical system and impair or destroy its function. Protection against over-voltage pulses have protective elements, u. For example, spark gaps, varistors, diodes, suppressor diodes, and are known in the art. Such protective devices are also referred to as OVP (over voltage protection).

Weiterhin wird unter einem Störereignis im Kontext der vorliegenden Erfindung ein Überstrom verstanden, mit dem ein elektrisches System, beispielsweise eine elektrische Leitung, beispielsweise durch einen Kurz- oder Erdschluss überlastet und/oder zerstört werden kann. Schutzvorrichtungen zum Schutz gegen Überströme werden umgangssprachlich als Sicherungen bezeichnet und sind dem Fachmann in vielfältigen Ausführungen, beispielsweise in Form von Schmelzsicherungen oder Leitungsschutzschaltern, bekannt.Furthermore, an interference event in the context of the present invention is understood to mean an overcurrent with which an electrical system, for example an electrical line, can be overloaded and / or destroyed, for example, by a short circuit or ground fault. Protective devices for protection against overcurrents are colloquially referred to as fuses and are the skilled person in various Versions, for example in the form of fuses or circuit breakers, known.

Es sind Schaltungen mit Mitteln zur Signalisierung wenigsten eines Funktionszustandes bekannt. Zur Erläuterung einer bekannten derartigen Schaltung wird bereits jetzt Bezug auf die Fig. 3a und 3b genommen. Gezeigt ist eine zwei elektrische Schaltpunkte verbindende Sicherung. Zur Signalisierung eines Funktionszustands der Sicherung ist dieser eine Reihenschaltung aus einem Vorwiderstand und einer gegenläufigen Parallelschaltung von zwei Leuchtdioden parallel geschaltet. Ist die Sicherung funktionsfähig, so ist die zwischen den beiden Schaltungspunkten herrschende Spannung zu klein um die Leuchtdioden mit einer für ein Aufleuchten ausreichenden Spannung zu versorgen. Wird die Sicherung, beispielsweise durch einen zu hohen Strom zerstört und unterbricht daher den Stromfluss, so steigt die Spannung zwischen den beiden Schaltungspunkten an und die Leuchtdioden werden ausreichend mit Spannung versorgt um durch ein Aufleuchten einen Funktionszustand, hier einen Defekt der Sicherung zu Signalisieren. Hierbei ist klar, dass abhängig von der Spannungsart, Gleich- oder Wechselspannung jeweils nur eine oder beide Leuchtdioden leuchten.There are known circuits with means for signaling at least one functional state. To explain a known circuit of this kind, reference will now be made to FIGS Fig. 3a and 3b taken. Shown is a fuse connecting two electrical switching points. To signal a functional state of the fuse, this is connected in parallel to a series circuit of a series resistor and an opposite parallel connection of two LEDs. If the fuse is functional, the voltage prevailing between the two circuit points is too small to supply the LEDs with sufficient voltage to light up. If the fuse, for example, destroyed by a high current and therefore interrupts the flow of current, so the voltage between the two points and the LEDs are supplied with sufficient voltage to a functional state, here a defect in the fuse signaling. It is clear that depending on the type of voltage, DC or AC voltage only one or both LEDs light up.

Eine Schaltung nach dem Oberbegriff des Anspruchs 1 ist aus der EP-A-1 628 317 bekannt.A circuit according to the preamble of claim 1 is known from EP-A-1 628 317 known.

Nachteilig an den bekannten Schaltungen ist, dass die zur Signalisierung eingesetzten Mittel, beispielsweise eine Leuchtdiode, zur Aufrechterhaltung der Signalisierung elektrische Energie benötigen und eine Rückwirkung auf die zu funktionsüberwachende Schutzvorrichtung und/oder eine elektrische Energie bereitstellende Einrichtung verursachen.A disadvantage of the known circuits is that the means used for signaling, such as a light emitting diode, to maintain the signaling electrical energy and cause a retroactive effect on the function monitoring protective device and / or an electrical energy-providing device.

Demgemäss ist es eine Aufgabe der Erfindung eine verbesserte elektrische Schaltung der gattungsgemäßen Art zu schaffen.Accordingly, it is an object of the invention to provide an improved electrical circuit of the generic type.

Die Erfindung löst die Aufgabe mit einer elektrischen Schaltung mit den Merkmalen des Anspruches 1.
Es wird ein Signalisierungsmittel vorgeschlagen, welches impulsaktivierbar und bistabil ausgeführt ist, nach einer Impulsaktivierung keine Schaltungsrückwirkung aufweist und zur dauerhaften, leistungslosen Signalisierung ausgestaltet ist.The invention solves the problem with an electrical circuit having the features of claim 1.
A signaling device is proposed which is pulse-activatable and bistable, has no circuit feedback after pulse activation and is designed for permanent, powerless signaling.

Somit ist in vorteilhafter Weise für eine dauerhafte Signalisierung eines Funktionszustandes keine elektrische Energie erforderlich und eine Rückwirkung des Signalisierungsmittels wird vermieden.Thus, electrical energy is advantageously required for a permanent signaling of a functional state and a reaction of the signaling means is avoided.

Weitere Ausgestaltungen der Erfindung ergeben sich aus der gegenständlichen Beschreibung, den Zeichnungen und den Merkmalen der Unteransprüche.Further embodiments of the invention will become apparent from the subject description, the drawings and the features of the subclaims.

Die Erfindung wird nachfolgend in Verbindung mit den beiliegenden Zeichnungen und der gegenständlichen Beschreibung näher erläutert.The invention will be explained in more detail in conjunction with the accompanying drawings and the description given.

Es zeigen:

Fig. 1a, 1b:
eine schematische Darstellung eines erfindungsgemäßen Signalisierungsmittels,
Fig. 2a, 2b:
eine schematische Darstellung einer weiteren Ausführungsform eines erfindungsgemäßen Signalisierungsmittels,
Fig. 3a, 3b:
eine Schaltung mit einem Signalisierungsmittel nach dem Stand der Technik,
Fig. 4a, 4b:
eine erfindungsgemäße Schaltung mit einem Signalisierungsmittel, und
Fig. 5a, 5b:
eine weitere erfindungsgemäße Schaltung mit einem Signalisierungsmittel.
Show it:
Fig. 1a, 1b:
a schematic representation of a signaling agent according to the invention,
2a, 2b:
a schematic representation of another embodiment of a signaling device according to the invention,
3a, 3b:
a circuit with a signaling means according to the prior art,
4a, 4b:
a circuit according to the invention with a signaling means, and
5a, 5b:
another circuit according to the invention with a signaling means.

Zunächst wird anhand von Fig. 1a und 1b und Fig. 2a und 2b ein erfindungsgemäßes Signalisierungsmittel 1 erläutert. Das Zusammenwirken des Signalisierungsmittels 1 mit einer elektrischen Schaltung wird weiter unten anhand der restlichen Figuren verdeutlicht.First, based on Fig. 1a and 1b and Fig. 2a and 2b an inventive signaling means 1 explained. The interaction of the signaling means 1 with an electrical circuit is illustrated below with reference to the remaining figures.

Fig. 1a zeigt ein Signalisierungsmittel 1 mit einem, beispielsweise in einer Gehäusewandung 2 gehaltenen Gehäuse 3. Das Gehäuse 3 ist länglich ausgeformt und weist an seinem oberen Ende 4 einen ggf. transparent gestalteten Abschluss 4a auf. Innerhalb des Gehäuses 3 ist ein Signalisierungselement 5 verschiebbar angeordnet. Das Signalisierungselement 5 ist zwischen einer - einen ersten Funktionszustand signalisierenden - ersten Position (wie in Fig. 1 a und 2a dargestellt) und einer - einen zweiten Funktionszustand signalisierenden - zweiten Position (wie in Fig. 1b und 2a dargestellt) durch ein Kraftelement, beispielsweise durch eine Feder 7 verschiebbar. Fig. 1a shows a signaling device 1 with a, for example, held in a housing 2 housing 3. The housing 3 is elongated and has at its upper end 4 a possibly transparent designed end 4a. Within the housing 3, a signaling element 5 is slidably disposed. The signaling element 5 is between a first position (which signals a first functional state) (as in FIG Fig. 1 a and 2a shown) and a - a second functional state signaling - second position (as in Fig. 1b and 2a represented) by a force element, for example by a spring 7 slidably.

Im weiteren Verlauf der Beschreibung der Erfindung wird davon ausgegangen, dass sich ein in der ersten Position befindliches Signalisierungselement 5 ein Funktionieren einer zu überwachenden Schutzvorrichtung signalisiert (Funktionszustand = funktionsfähig) und dass sich ein in der zweiten Position befindliches Signalisierungselement 5 ein Nichtfunktionieren einer zu überwachenden Schutzvorrichtung signalisiert (Funktionszustand = nicht funktionsfähig, bzw. defekt).In the further course of the description of the invention, it is assumed that a signaling element 5 located in the first position signals the functioning of a protective device to be monitored (functional state = functional) and that a signaling element 5 located in the second position is a non-functioning protective device to be monitored signaled (functional status = not functional, or defective).

Das Signalisierungsmittel 1 weist weiterhin ein Arretierungsmittel 8 mit einer Rastnase 8a auf, welches das Signalisierungselement 5 zunächst in der ersten Position (Fig. 1a und 2a) arretiert. Hierbei greift die Rastnase 8a in eine mit dieser korrespondierenden innenliegenden Öffnung 8b des Signalisierungselements 5 ein. Wird ein, beispielsweise als Elektromagnet 9 ausgeführtes, Zugelement impuisaktiviert so wird die Rastnase 8a bei eine Impulsaktivierung des Elektromagnets 9 außer Eingriff mit der auf der Innenseite des Signalisierungselements 5 angeordneten Öffnung 8b gebracht. Durch die Kraftwirkung der Feder 7 wird das Signalisierungselement 5 von der ersten in die zweiter Position bewegt. Die Impulsaktivierung des Elektromagnets 9 erfolgt durch Beaufschlagung mit einem elektrischen Impuls, über elektrische Anschlussmittel, beispielsweise über die Leiter 9a, 9b und die Kontaktstifte 9c, 9d.The signaling means 1 further comprises a locking means 8 with a locking lug 8a, which first the signaling element 5 in the first position ( Fig. 1a and 2a ) arrested. In this case, the detent lug 8a engages in a corresponding inner opening 8b of the signaling element 5. If a, for example, designed as an electromagnet 9, pull element is pulse-activated so the detent 8a is brought in a pulse activation of the electromagnet 9 out of engagement with the arranged on the inside of the signaling element 5 opening 8b. Due to the force of the spring 7, the signaling element 5 is moved from the first to the second position. The pulse activation of the electromagnet 9 is effected by application of an electrical pulse, via electrical connection means, for example via the conductors 9a, 9b and the contact pins 9c, 9d.

Das in Fig. 1a und 1b gezeigte Signalisierungsmittel 1 ist lediglich zur optischen Signalisierung eines Funktionszustands ausgestaltet. Hierbei ist das Signalisierungselement 5 einfarbig oder mehrfarbig ausgestaltet und durch den optisch transparent ausgeführten Abschluss 4a des Gehäuses 3 sichtbar, wenn es sich in der zweiten Position befindet (Fig. 1b).This in Fig. 1a and 1b shown signaling means 1 is configured only for optical signaling of a functional state. In this case, the signaling element 5 is designed monochrome or multicolor and visible through the optically transparent executed end 4a of the housing 3 when it is in the second position ( Fig. 1b ).

Zusätzlich zu einer optischen Signalisierung weist das in Fig. 2a und 2b dargestellte Signalisierungselement 5 Mittel zur elektrischen Signalisierung, beispielsweise die Kontaktstifte 10a und 10b sowie den Kontaktverbinder 10c auf. Auf diese Weise ist ein Öffner realisiert, wobei der Öffner öffnet wenn das Signalisierungselement 5 von der ersten Position (Fig. 2a) in eine zweite Position (Fig. 2b) bewegt wird. Aus Gründen der Übersichtlichkeit sind die auch in den Fig. 2a und 2b dargestellten Mittel zur Impulsaktivierung nicht mit Bezugszeichen versehen.In addition to an optical signaling, the in Fig. 2a and 2b illustrated signaling element 5 means for electrical signaling, for example, the contact pins 10a and 10b and the contact connector 10c. In this way, an opener is realized, wherein the opener opens when the signaling element 5 from the first position ( Fig. 2a ) into a second position ( Fig. 2b ) is moved. For the sake of clarity, they are also in the Fig. 2a and 2b Not shown means for pulse activation provided with reference numerals.

Fig. 3a und 3b zeigen eine aus dem Stand der Technik bekannte Überwachung einer Sicherung 11 mittels antiparallel geschalteter Leuchtdioden 12. Die Funktionsweise dieser Schaltung wurde bereits in der Beschreibungseinleitung erläutert. Fig. 3a and 3b show a known from the prior art monitoring a fuse 11 by means of anti-parallel light emitting diodes 12. The operation of this circuit has already been explained in the introduction to the description.

Wie in Fig. 4a und 4b dargestellt, ist hier die aus dem Stand der Technik bekannte Leuchtdiodenanordnung 12 durch das erfindungsgemäße Signalisierungsmittel 5 ersetzt. Bei der dargestellten Schaltung ist der über die Kontaktstifte 9c, 9d (siehe Fig. 1a und 1b) impulsaktivierbare Elektromagnet 9 (siehe Fig. 1a und 1b) in Reihe mit dem durch die Mittel 10a, 10b und 10c gebildeten Öffner (siehe Fig. 2a und 2b) geschaltet. Auf diese Weise ergibt sich folgenden Funktion: Wird die Sicherung 11 durch ein Störereignis zerstört so erzeugt dies einen Spannungsimpuls zwischen den Schaltungspunkten. Dies führt zur Impulsaktivierung des über den Vorwiderstand Rv an den Schaltungspunkten 13 und 14 angeschlossenen Elektromagnet 9 (siehe Fig. 1 a und 1 b) des Signalisierungsmittels 5. In der Folge öffnet der Öffnungskontakt des Signalisierungsmittels 5 wie oben stehend beschrieben. Der Stromfluss durch den Elektromagnet wird dadurch unterbrochen, der Elektromagnet 9 wird stromlos und nimmt damit keine elektrische Leistung auf. Das Signalisierungselement 5 verbleibt in der zweiten Position, wie in Fig. 4b dargestellt (vergleiche auch Fig. 1b und 2b) und signalisiert dauerhaft den Funktionszustand der Schutzvorrichtung. Durch das Öffnen des Öffners (vgl. Fig 2a und 2b, 10a, 10b und 10c) wird die galvanische Verbindung zwischen den Schaltungspunkten 13 und 14 unterbrochen, so dass durch das Signalisierungselement 5 keine Rückwirkung auf die Schaltung und die zu überwachende Schutzvorrichtung, hier die Sicherung 11, besteht.As in Fig. 4a and 4b 1, the light-emitting diode arrangement 12 known from the prior art is replaced by the signaling means 5 according to the invention. In the illustrated circuit, the via the contact pins 9c, 9d (see Fig. 1a and 1b ) pulse activatable electromagnet 9 (see Fig. 1a and 1b ) in series with the opener formed by the means 10a, 10b and 10c (see Fig. 2a and 2b ). This results in the following function: If the fuse 11 is destroyed by a disturbance event, this generates a voltage pulse between the circuit points. This leads to the pulse activation of the electromagnet 9 connected via the series resistor Rv to the circuit points 13 and 14 (see FIG Fig. 1 a and 1 b) of the signaling means 5. As a result, the opening contact of the signaling means 5 opens as described above. The current flow through the electromagnet is thereby interrupted, the electromagnet 9 is de-energized and thus does not absorb electrical power. The signaling element 5 remains in the second position, as in FIG Fig. 4b shown (compare also Fig. 1b and 2 B ) and permanently signals the functional state of the protection device. By opening the opener (see. FIGS. 2a and 2b , 10a, 10b and 10c), the galvanic connection between the circuit points 13 and 14 is interrupted, so that by the signaling element 5 has no effect on the circuit and the protection device to be monitored, here the fuse 11.

Das Signalisierungsmittel 5 weist weiterhin eine nicht dargestellte elektrisch betätigbare Rückstelleinrichtung auf mit der das Signalisierungselement 5 von der zweiten wieder in die erste Position rückstellbar ist, beispielsweise nach einer erfolgten Reparatur einer zu überwachenden Schutzvorrichtung.The signaling means 5 further comprises an unillustrated electrically operated restoring device with which the signaling element 5 can be reset from the second back to the first position, for example after a successful repair of a protective device to be monitored.

In den Fig. 5a und 5b ist eine Schutzvorrichtung 15 zum Schutz elektrische Systeme gegen Überspannungen und das erfindungsgemäße Signalisierungsmittel 5 dargestellt.In the Fig. 5a and 5b a protection device 15 for protecting electrical systems against overvoltages and the signaling device 5 according to the invention is shown.

Im Eingangsbereich der Schutzvorrichtung 15 liegt jeweils eine Funkenstrecke zwischen zwei Zweigen E1-A1 und E3-A3 sowie zwischen zwei Zweigen E2-A2 und E3-A3, beide Funkenstrecken sind in der vorliegenden Ausführungsform in einem mit FS bezeichneten Bauteil untergebracht. Dieser Teil der Schutzvorrichtung wird als Grobschutz bezeichnet und "vernichtet" den größten Teil der durch ein Störereignis in die Schutzvorrichtung 15 eingekoppelten Energie.In each case a spark gap between two branches E1-A1 and E3-A3 and between two branches E2-A2 and E3-A3 lies in the entrance area of the protective device 15, both spark gaps being accommodated in a component designated FS in the present embodiment. This part of the protection device is considered coarse protection denotes and "destroys" most of the injected by a disturbance event in the protection device 15 energy.

Der restliche Teil der Schutzvorrichtung 15 wird als Feinschutz bezeichnet und dient vorrangig dazu, die auftretenden Spannungen auf ein für das zu schützende elektrische System ungefährliches Maß zu begrenzen. Eine Eingangsklemme E1 ist über einen Widerstand R1 mit einer Ausgangsklemme A1 verbunden. Parallel zur Ausgangsklemme A1 und zu einer auf PE-Potential liegenden Ausgangsklemme A3 liegt eine Reihenschaltung aus einer Suppressordiode SD1 und antiparallel geschalteten Dioden D1 und D2. Entsprechend ist eine Eingangsklemme E2 über einen Widerstand R2 mit einer Ausgangsklemme A2 verbunden, parallel zur Ausgangsklemme A2 und zur auf PE-Potential liegenden Ausgangsklemme A3 liegt eine Reihenschaltung aus einer Suppressordiode SD2 und den antiparallel geschalteten Dioden D1 und D2.The remaining part of the protection device 15 is referred to as fine protection and serves primarily to limit the voltages occurring to a safe level for the electrical system to be protected. An input terminal E1 is connected via a resistor R1 to an output terminal A1. Parallel to the output terminal A1 and to a lying on PE potential output terminal A3 is a series circuit of a suppressor diode SD1 and anti-parallel diodes D1 and D2. Accordingly, an input terminal E2 is connected via a resistor R2 to an output terminal A2, parallel to the output terminal A2 and lying at PE potential output terminal A3 is a series circuit of a suppressor diode SD2 and the antiparallel connected diodes D1 and D2.

Ein nicht dargestelltes, gegen Störereignisse zu schützendes elektrisches System, beispielsweise ein Messverstärker oder ein Industrie-PC, ist über die Ausgangsklemmen A1 bis A3 an die Schutzvorrichtung 15 angeschlossen. Die Eingangsklemmen E1 - E3 sind je nach Anwendung ihrerseits mit Signalquellen und / oder mit elektrische Energie liefernden Einrichtungen, beispielsweise ein elektrische Versorgungsnetz, verbunden.An unillustrated electrical system to be protected against disturbance events, for example a measuring amplifier or an industrial PC, is connected to the protective device 15 via the output terminals A1 to A3. Depending on the application, the input terminals E1-E3 are in turn connected to signal sources and / or to devices supplying electrical energy, for example an electrical supply network.

In jedem Fall erfolgt die Installation und die Verschaltung von Schutzvorrichtung 15 und zu schützendem elektrischen System derart, dass im Falle eines Störereignisses eingekoppelte elektrische Energie auf der Eingangsseite der Schutzvorrichtung 15 eingekoppelt wird. Dies ist dem Fachmann bekannt.In any case, the installation and the interconnection of the protective device 15 and the electrical system to be protected takes place in such a way that, in the event of an interference event, coupled-in electrical energy is coupled in on the input side of the protective device 15. This is known to the person skilled in the art.

Die dargestellte Schaltung in den Fig. 5a und 5b weist weiterhin eine Zustandserkennungseinrichtung 16 auf, die die Schutzvorrichtung 15 überwacht und im Falle eins Defekts der Schutzvorrichtung 15 das angeschlossenen Signalisierungsmittel 5 mit einem elektrischen Signal, beispielsweise in Form eines elektrischen Impulses, beaufschlagt. Durch einen derartigen Impuls wird das Signalisierungsmittel 5 aktiviert, so dass, wie bereits ausgeführt, eine dauerhafte und leistungslose Signalisierung des Funktionszustandes der Schutzvorrichtung 15 erfolgt. Weiterhin kann auch hier eine Rückwirkungsfreiheit durch das an hand der Fig. 4a und 4b erläuterte Verschalten mit dem durch die Mittel 10a, 10b und 10c realisierten Öffners erreicht werden (vgl. Fig 2a und 2b, 10a, 10b und 10c). Das Signalisierungsmittel 5 kann zusätzlich zu dem bereits beschriebenen Kontakt einen weiteren Kontakt 17, beispielsweise zur Weitermeldung eines Funktionszustands and ein nicht dargestelltes übergeordnetes elektrisches System, aufweisen.The circuit shown in the Fig. 5a and 5b also has a state recognition device 16 which monitors the protection device 15 and, in the event of a defect in the protection device 15, acts on the connected signaling device 5 with an electrical signal, for example in the form of an electrical pulse. By such a pulse, the signaling means 5 is activated, so that, as already stated, a permanent and powerless signaling of the functional state of the protective device 15 takes place. Furthermore, here also a non-reaction by the on hand Fig. 4a and 4b explained interconnections can be achieved with the realized by the means 10a, 10b and 10c opener (see. FIGS. 2a and 2b , 10a, 10b and 10c). The signaling means 5 may additionally to the contact already described a further contact 17, for example, for retransmission of a functional state and a non-illustrated higher-level electrical system having.

Die Erfindung ist nicht auf die beschriebenen Ausführungsbeispiele beschränkt, die auf vielfache Weise abgewandelt werden können. Insbesondere ist es möglich die genannten Merkmale in anderen als den genannten Kombinationen auszuführen.The invention is not limited to the described embodiments, which can be modified in many ways. In particular, it is possible to carry out the mentioned features in combinations other than those mentioned.

Claims (7)

  1. Electrical circuit having a protective device (11, 15) for the protection of electrical systems against trouble events and means (1) for signaling of at least one functional state of the protective device (11, 15), wherein the signaling means (1) is made so that it can be pulse-activated and so that it will be bistable, that after impulse activation, it does not have any circuit repercussions, and that it is equipped for permanent currentless signaling, characterized in that the protective device has an overvoltage protection device (15) and that the signaling means (1) comprises a longitudinally shaped housing (3) having an upper end (4) with a transparently made ending (4a) and a signaling element (5), wherein the signaling element (5) is movably arranged within the housing (3) and wherein the housing (3) is retained in a housing wall (2) and the signaling means (1) has an electrically operable resetting device by means of which the signaling element (5) can be reset from the second position into the first position.
  2. Electrical circuit according to Claim 1, characterized in that the signaling means (1) optically and/or electrically signals at least one functional state.
  3. Electrical circuit according to one of the above claims, characterized in that the signaling element (5) can be moved from a first position (Figs. 1 a, 2a) signaling a first functional state into a second position (Figs. 1 b, 2b) signaling a second functional state, whereby the signaling element (5) is kept arrested in the first position by arresting means (8) that can be released by pulse activation and whereby, after a pulse activation of the arresting means (8), the signaling element (5) can be moved from the first position into the second position by means of a force element (7).
  4. Electrical circuit according to one of the above claims, characterized in that the force element (7) is a spring.
  5. Electrical circuit according to one of the above claims, characterized in that the signaling element (5) is made in one color for optical signaling.
  6. Electrical circuit according to one of the above claims, characterized in that the signaling element (5) is made multicolor for optical signaling.
  7. Electrical circuit according to one of the above claims, characterized in that the protective device has a line protection switch (11).
EP09730964.5A 2008-04-11 2009-03-12 Electrical circuit having a means for signaling Active EP2274760B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SI200931666A SI2274760T1 (en) 2008-04-11 2009-03-12 Electrical circuit having a means for signaling

Applications Claiming Priority (2)

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DE202008005085U DE202008005085U1 (en) 2008-04-11 2008-04-11 Electrical circuit with a means of signaling
PCT/EP2009/052907 WO2009124820A1 (en) 2008-04-11 2009-03-12 Electrical circuit having a means for signaling

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EP2274760A1 EP2274760A1 (en) 2011-01-19
EP2274760B1 true EP2274760B1 (en) 2017-04-19

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US (1) US8379362B2 (en)
EP (1) EP2274760B1 (en)
DE (1) DE202008005085U1 (en)
ES (1) ES2631479T3 (en)
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WO (1) WO2009124820A1 (en)

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DE102011112474B4 (en) * 2011-09-05 2017-07-13 Dehn + Söhne Gmbh + Co. Kg Method and arrangement for overvoltage protection of inverters for photovoltaic installations
DE102016203506B4 (en) * 2016-03-03 2021-10-07 Siemens Aktiengesellschaft Tripping device and electromechanical circuit breaker
DE102016011815B3 (en) * 2016-10-05 2018-02-15 IAD Gesellschaft für Informatik, Automatisierung und Datenverarbeitung mbH Control gear with staggered overvoltage and overcurrent protection for the control of intelligent light sources and devices as well as light sources with this control gear
DE102017129657A1 (en) * 2017-07-10 2019-01-10 Dehn + Söhne Gmbh + Co. Kg Arrangement for the non-reversible detection and display of electrical overcurrents or current limits by means of a pre-assembled conductor
CN113514715A (en) * 2021-04-20 2021-10-19 核工业西南物理研究院 Single capacitor overcurrent fault real-time indication circuit when a large number of capacitors are connected in parallel

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EP1826795A1 (en) * 2006-02-24 2007-08-29 ABB France Device for protecting against overvoltage with simplified display system and corresponding manufacturing method

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EP1826795A1 (en) * 2006-02-24 2007-08-29 ABB France Device for protecting against overvoltage with simplified display system and corresponding manufacturing method

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DE202008005085U1 (en) 2009-08-20
US20110038089A1 (en) 2011-02-17
WO2009124820A1 (en) 2009-10-15
EP2274760A1 (en) 2011-01-19
SI2274760T1 (en) 2017-07-31
US8379362B2 (en) 2013-02-19
ES2631479T3 (en) 2017-08-31

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