EP0620575A1 - Installation to switch off a H.T. circuit - Google Patents

Installation to switch off a H.T. circuit Download PDF

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Publication number
EP0620575A1
EP0620575A1 EP93890056A EP93890056A EP0620575A1 EP 0620575 A1 EP0620575 A1 EP 0620575A1 EP 93890056 A EP93890056 A EP 93890056A EP 93890056 A EP93890056 A EP 93890056A EP 0620575 A1 EP0620575 A1 EP 0620575A1
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EP
European Patent Office
Prior art keywords
voltage
circuit
fuse
switching
switch contact
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP93890056A
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German (de)
French (fr)
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EP0620575B1 (en
Inventor
Rudolf Holly
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KIEPE ELECTRIC GesmbH
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KIEPE ELECTRIC GESMBH HOLLY RUDOLF
Holly Rudolf
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Priority to AT0005292A priority Critical patent/AT397003B/en
Application filed by KIEPE ELECTRIC GESMBH HOLLY RUDOLF, Holly Rudolf filed Critical KIEPE ELECTRIC GESMBH HOLLY RUDOLF
Priority to EP93890056A priority patent/EP0620575B1/en
Priority to DE59306842T priority patent/DE59306842D1/en
Publication of EP0620575A1 publication Critical patent/EP0620575A1/en
Application granted granted Critical
Publication of EP0620575B1 publication Critical patent/EP0620575B1/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/10—Adaptation for built-in fuses
    • H01H9/106—Adaptation for built-in fuses fuse and switch being connected in parallel
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/10—Adaptation for built-in fuses

Definitions

  • the invention relates to a device for switching off a high-voltage circuit, preferably a circuit fed with high DC voltage, with at least one switching contact arranged in the circuit and actuable as a function of a measured variable, for example a temperature or a pressure.
  • the problem arises of switching off a circuit in the event of an impermissibly high increase in a measured variable in the system fed by the circuit.
  • the current must be interrupted if the temperature in an electric motor takes on an impermissibly high value in order to prevent damage to the electric motor.
  • This problem occurs e.g. in traction vehicles that are fed with high voltage.
  • a switch contact that can be actuated as a function of the relevant measured variable is provided in the circuit. Particularly when the supply is made with high DC voltage, care must be taken to extinguish the arc that occurs when the switch contact is opened.
  • the object of the present invention is to avoid this disadvantage and to provide a device for switching off a high-voltage circuit which is extremely simple in its construction and is safe to use and which, above all, enables the use of common, inexpensive construction elements.
  • the invention proposes that a high-voltage fuse is connected in parallel to the switch contact or switch contacts, the rated current of which is lower than the nominal current flowing in the high-voltage circuit.
  • the device designed according to the invention enables the use of switch contacts without special constructive measures for the deletion of the light floor that occurs when opening, for example the use of commercially available limit switches that are in active connection with a measured variable sensor and open the switch contact located in the high-voltage circuit when the measured variable in question increases unacceptably . If this switch contact is opened, the circuit is not interrupted by this, rather the entire nominal current flowing in the high-voltage circuit flows through the high-voltage fuse, via which only a small fraction of this nominal current flows when the switch contact is closed due to the high resistance. For this reason, the rated current of the high-voltage fuse can be lower than the nominal current flowing in the high-voltage circuit without the risk that the high-voltage fuse will respond in normal operation. Only when the entire rated current flows through the high-voltage fuse after the switching contact has opened does the same respond, so that the high-voltage circuit is completely interrupted by the high-voltage fuse.
  • the device according to the invention also enables the high-voltage circuit to be switched off in the event of an impermissible increase in various measured variables.
  • a plurality of switching elements which can be actuated as a function of different measured variables are connected in series, the high-voltage fuse of this series connection being connected in parallel. If even one of the switching contacts connected in series is opened, the entire nominal current then flows through the high-voltage fuse and this responds because its rated current is lower than this nominal current.
  • the high-voltage fuse consists of a commercially available fuse. This is cheap, can be easily replaced after eliminating the error causing the impermissibly high increase in the measured variable in question and the Arcing which occurs in response to such fuses is immediately extinguished.
  • the high-voltage fuse responds with a time delay when the nominal current flowing in the high-voltage circuit occurs. This ensures that the high-voltage circuit is only completely interrupted by the response of the high-voltage fuse when the switch contact is fully open, so that an arc does not occur due to early interruption of the high-voltage circuit by the high-voltage fuse when the switch contact is not yet fully open.
  • FIG. 1 shows the circuit diagram of a first embodiment
  • FIG. 2 shows a second embodiment of the invention
  • the high-voltage circuit shown in both versions is supplied with a DC voltage of 1000 V, for example.
  • the nominal current i is, for example, 10 A.
  • a high-voltage fuse 2 in the form of a fuse is connected in parallel to a switch contact 1.
  • a switch contact 1 there is generally a consumer e.g. a motor or a heater.
  • the switch contact 1 consists, for example, of a conventional limit switch, which is connected via a line (not shown) to a temperature sensor which monitors the temperature in the part to be monitored in the system fed by the high-voltage circuit and, when a certain predetermined temperature occurs, causes the switch contact 1 to open .
  • the fuse 2 has, for example, a rated current of 2 A.
  • Such a fuse 2 is now expediently used, which responds with a time delay when the nominal current i occurs, so that it is ensured that the switch contact 1 is already fully open when the high-voltage fuse 2 breaks the circuit and therefore no arc occurs in the switch contact 1.
  • the high-voltage fuse is, for example, a conventional fuse, consisting of a glass tube closed with brass caps at the ends, in which a fuse wire is located. As a result, the arc in the glass tube which occurs when the high-voltage fuse responds is extinguished.
  • the embodiment according to FIG. 2 differs from the embodiment according to FIG. 1 in that two switch contacts 1 ', 1' 'are connected in series, of which the switch contact 1', for example when the temperature rises excessively and the switch contact 1 ' 'responds, for example, to an impermissibly high increase in pressure.
  • the series connection of the two switching contacts 1 ', 1' ' ensures that even if only one switching contact responds, the entire rated current flows through the fuse, so that it responds in the manner described in connection with FIG.
  • the high-voltage circuit shown in FIG. 2 is also fed, for example, with 1000 V direct current.
  • the rated current is, for example, 16 A, the rated current of the fuse 2 in this case is, for example, 4 A.

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  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
  • Keying Circuit Devices (AREA)

Abstract

A device for switching off a high-tension circuit, which is preferably supplied with a high DC voltage, has a switching contact (1), which can be operated by a measured variable, and a high-tension fuse link (2), which is connected in parallel with this switching contact (1) and whose design operating current is less than the rated current flowing in the high-tension circuit. If the switching contact (1) opens in the event of an unacceptably high rise in the measured variable, then the total rated current flows via the high-tension fuse link (2) so that it responds and interrupts the circuit without any arc occurring on the switching contact (1). <IMAGE>

Description

Die Erfindung betrifft eine Einrichtung zum Abschalten eines Hochspannungsstromkreises, vorzugsweise eines mit hoher Gleichspannung gespeisten Stromkreises, mit zumindest einem im Stromkreis angeordneten, in Abhängigkeit von einer Meßgröße, beispielsweise von einer Temperatur oder einem Druck, betätigbaren Schaltkontakt.The invention relates to a device for switching off a high-voltage circuit, preferably a circuit fed with high DC voltage, with at least one switching contact arranged in the circuit and actuable as a function of a measured variable, for example a temperature or a pressure.

Fallweise tritt das Problem auf, einen Stromkreis bei einem unzulässig hohen Ansteigen einer Meßgröße in der vom Stromkreis gespeisten Anlage abzuschalten. So muß beispielsweise eine Unterbrechung des Stromes erfolgen, wenn die Temperatur in einem Elektromotor einen unzulässig hohen Wert annimmt, um eine Beschädigung des Elektromotors zu verhindern. Dieses Problem tritt z.B. bei Triebfahrzeugen auf, die mit Hochspannung gespeist werden. Zur Unterbrechung des Stromkreises ist in diesem ein in Abhängigkeit von der betreffenden Meßgröße betätigbarer Schaltkontakt vorgesehen. Insbesondere dann, wenn die Anspeisung mit hoher Gleichspannung erfolgt, muß für eine Löschung des beim Öffnen des Schaltkontaktes auftretenden Lichtbogens Sorge getragen werden. Übliche mit einem Meßgrößenfühler in Verbindung stehende Begrenzungsschalter konnten daher, da sie keine für die Löschung des Lichtbogens geeigneten Einrichtungen besitzen, nicht in einen solchen Hochspannungsstromkreis eingeschaltet werden, es mußten vielmehr aufwendige konstruktive Maßnahmen getroffen werden, um bei einem unzulässigen Anstieg einer Meßgröße, beispielsweise der Temperatur oder des Druckes, eine Unterbrechung des Hochspannungsstromkreises zu bewirken.In some cases the problem arises of switching off a circuit in the event of an impermissibly high increase in a measured variable in the system fed by the circuit. For example, the current must be interrupted if the temperature in an electric motor takes on an impermissibly high value in order to prevent damage to the electric motor. This problem occurs e.g. in traction vehicles that are fed with high voltage. To interrupt the circuit, a switch contact that can be actuated as a function of the relevant measured variable is provided in the circuit. Particularly when the supply is made with high DC voltage, care must be taken to extinguish the arc that occurs when the switch contact is opened. Conventional limit switches in connection with a measured-value sensor could therefore not be switched into such a high-voltage circuit, since they do not have any devices suitable for extinguishing the arc, rather complex design measures had to be taken to prevent an unacceptable increase in a measured variable, e.g. Temperature or pressure to cause an interruption in the high voltage circuit.

Es ist bereits bekannt, dem Schaltkontakt einen nichtlinearen bzw. spannungsabhängigen Widerstand parallel zu schalten (DE-OS 2 361 203, GB-PS 1 589 071). Über diesen Widerstand fließt infolge seiner Spannungsabhängigkeit praktisch nur während des Schaltvorganges Strom, wodurch eine Löschung des im Schaltkontakt auftretenden Lichtbogens beim Nulldurchgang des sinusförmigen Wechselstromes erfolgt. Für eine hohe Gleichspannung ist diese bekannte Anordnung nicht geeignet, da über den Widerstand auch nach Öffnung des Schaltkontaktes ein Reststrom fließt, der nur durch Anordnung eines zusätzlichen, in Serie zum nichtlinearen Widerstand angeordneten Schalters unterbrochen werden kann, der erst nach dem vollständigen Öffnen des Schaltkontaktes geöffnet werden darf. Hiezu sind aufwendige zusätzliche konstruktive Maßnahmen erforderlich.It is already known to connect the non-linear or voltage-dependent resistor in parallel with the switching contact (DE-OS 2 361 203, GB-PS 1 589 071). Due to its voltage dependency, current flows through this resistor practically only during the switching process, as a result of which the arc occurring in the switching contact is extinguished when the sinusoidal alternating current passes through zero. This known arrangement is not suitable for a high DC voltage, since a residual current flows through the resistor even after the switch contact has opened, which can only be interrupted by arranging an additional switch arranged in series with the non-linear resistor, which switch only after the switch contact has been fully opened may be opened. This requires complex additional constructive measures.

Die vorliegende Erfindung hat sich zur Aufgabe gestellt, diesen Nachteil zu vermeiden und eine Einrichtung zum Abschalten eines Hochspannungsstromkreises zu schaffen, welche äußerst einfach in ihrem Aufbau und sicher in der Anwendung ist und welche vor allem die Anwendung üblicher, preisgünstiger Konstruktionselemente ermöglicht. Zur Lösung dieser Aufgabe schlägt die Erfindung vor, daß dem Schaltkontakt bzw. den Schaltkontakten eine Hochspannungssicherung parallel geschaltet ist, deren Bemessungsstrom geringer ist als der im Hochspannungsstromkreis fließende Nennstrom.The object of the present invention is to avoid this disadvantage and to provide a device for switching off a high-voltage circuit which is extremely simple in its construction and is safe to use and which, above all, enables the use of common, inexpensive construction elements. To achieve this object, the invention proposes that a high-voltage fuse is connected in parallel to the switch contact or switch contacts, the rated current of which is lower than the nominal current flowing in the high-voltage circuit.

Die erfindungsgemäß ausgebildete Einrichtung ermöglicht die Verwendung von Schaltkontakten ohne besondere konstruktive Maßnahmen für die Löschung des beim Öffnen auftretenden Lichtbodens, also beispielsweise die Verwendung handelsüblicher Begrenzungsschalter, die mit einem Meßgrößenfühler in Wirkverbindung stehen und bei einem unzulässigen Ansteigen der betreffenden Meßgröße den im Hochspannungsstromkreis liegenden Schaltkontakt öffnen. Wird nämlich dieser Schaltkontakt geöffnet, so wird der Stromkreis hiedurch nicht unterbrochen, es fließt vielmehr dann der gesamte im Hochspannungsstromkreis fließende Nennstrom über die Hochspannungssicherung, über die bei geschlossenem Schaltkontakt wegen des hohen Widerstandes lediglich ein geringer Bruchteil dieses Nennstromes fließt. Der Bemessungsstrom der Hochspannungssicherung kann aus diesem Grunde geringer sein als der im Hochspannungsstromkreis fließende Nennstrom, ohne daß die Gefahr besteht, daß im Normalbetrieb die Hochspannungssicherung anspricht. Erst dann, wenn nach Öffnen des Schaltkontaktes der gesamte Nennstrom über die Hochspannungssicherung fließt, erfolgt ein Ansprechen derselben, sodaß der Hochspannungsstromkreis durch die Hochspannungssicherung vollständig unterbrochen wird.The device designed according to the invention enables the use of switch contacts without special constructive measures for the deletion of the light floor that occurs when opening, for example the use of commercially available limit switches that are in active connection with a measured variable sensor and open the switch contact located in the high-voltage circuit when the measured variable in question increases unacceptably . If this switch contact is opened, the circuit is not interrupted by this, rather the entire nominal current flowing in the high-voltage circuit flows through the high-voltage fuse, via which only a small fraction of this nominal current flows when the switch contact is closed due to the high resistance. For this reason, the rated current of the high-voltage fuse can be lower than the nominal current flowing in the high-voltage circuit without the risk that the high-voltage fuse will respond in normal operation. Only when the entire rated current flows through the high-voltage fuse after the switching contact has opened does the same respond, so that the high-voltage circuit is completely interrupted by the high-voltage fuse.

Die erfindungsgemäße Einrichtung ermöglicht auch die Abschaltung des Hochspannungsstromkreises bei einem unzulässigen Ansteigen verschiedener Meßgrößen. In diesem Fall sind erfindungsgemäß mehrere in Abhängigkeit von verschiedenen Meßgrößen betätigbare Schaltelemente in Serie geschaltet, wobei die Hochspannungssicherung dieser Serienschaltung parallel geschaltet ist. Wird auch nur einer der in Serie geschalteten Schaltkontakte geöffnet, so fließt in der Folge der gesamte Nennstrom über die Hochspannungssicherung und diese spricht, da ihr Bemessungsstrom geringer als dieser Nennstrom ist, an.The device according to the invention also enables the high-voltage circuit to be switched off in the event of an impermissible increase in various measured variables. In this case, according to the invention, a plurality of switching elements which can be actuated as a function of different measured variables are connected in series, the high-voltage fuse of this series connection being connected in parallel. If even one of the switching contacts connected in series is opened, the entire nominal current then flows through the high-voltage fuse and this responds because its rated current is lower than this nominal current.

Besonders zweckmäßig ist es, wenn die Hochspannungssicherung aus einer handelsüblichen Schmelzsicherung besteht. Diese ist billig, kann nach Beseitigung des das unzulässig hohe Ansteigen der betreffenden Meßgröße bewirkenden Fehlers leicht ausgetauscht werden und der beim Ansprechen auftretende Lichtbogen wird in bei solchen Schmelzsicherungen bekannter Weise sofort gelöscht.It is particularly useful if the high-voltage fuse consists of a commercially available fuse. This is cheap, can be easily replaced after eliminating the error causing the impermissibly high increase in the measured variable in question and the Arcing which occurs in response to such fuses is immediately extinguished.

Zweckmäßig ist es, wenn gemäß einem weiteren Merkmal der Erfindung die Hochspannungssicherung bei Auftreten des im Hochspannungsstromkreis fließenden Nennstromes mit Zeitverzögerung anspricht. Dadurch wird nämlich sichergestellt, daß der Hochspannungsstromkreis erst dann durch das Ansprechen der Hochspannungssicherung vollständig unterbrochen ist, wenn der Schaltkontakt vollständig geöffnet ist, sodaß nicht durch frühzeitiges Unterbrechen des Hochspannungsstromkreises durch die Hochspannungssicherung beim noch nicht vollständig geöffneten Schaltkontakt ein Lichtbogen auftritt.It is expedient if, according to a further feature of the invention, the high-voltage fuse responds with a time delay when the nominal current flowing in the high-voltage circuit occurs. This ensures that the high-voltage circuit is only completely interrupted by the response of the high-voltage fuse when the switch contact is fully open, so that an arc does not occur due to early interruption of the high-voltage circuit by the high-voltage fuse when the switch contact is not yet fully open.

In der Zeichnung ist die Erfindung anhand von Ausführungsbeispielen schematisch veranschaulicht. Fig.1 zeigt das Schaltbild einer ersten Ausführungsform und Fig.2 einer zweiten Ausführungsform derThe invention is illustrated schematically in the drawing using exemplary embodiments. 1 shows the circuit diagram of a first embodiment and FIG. 2 shows a second embodiment of the

erfindungsgemäßen Einrichtung. Der in beiden Ausführungen dargestellte Hochspannungsstromkreis wird beispielsweise mit einer Gleichspannung von 1000 V gespeist. Der Nennstrom i beträgt bei der ersten Ausführungsform beispielsweise 10 A.device according to the invention. The high-voltage circuit shown in both versions is supplied with a DC voltage of 1000 V, for example. In the first embodiment, the nominal current i is, for example, 10 A.

Bei der Ausführungsform nach Fig.1 ist einem Schaltkontakt 1 eine Hochspannungssicherung 2 in Form einer Schmelzsicherung parallel geschaltet. Mit 3 ist allgemein ein Verbraucher, z.B. ein Motor oder ein Heizgerät bezeichnet. Der Schaltkontakt 1 besteht beispielsweise aus einem üblichen Begrenzungsschalter, der über eine nicht dargestellte Leitung mit einem Temperaturfühler verbunden ist, der die Temperatur in dem zu überwachenden Teil der durch den Hochspannungsstromkreis gespeisten Anlage überwacht und bei Auftreten einer bestimmten vorgegebenen Temperatur das Öffnen des Schaltkontaktes 1 bewirkt. Die Schmelzsicherung 2 hat beispielsweise einen Bemessungsstrom von 2 A.In the embodiment according to FIG. 1, a high-voltage fuse 2 in the form of a fuse is connected in parallel to a switch contact 1. At 3 there is generally a consumer e.g. a motor or a heater. The switch contact 1 consists, for example, of a conventional limit switch, which is connected via a line (not shown) to a temperature sensor which monitors the temperature in the part to be monitored in the system fed by the high-voltage circuit and, when a certain predetermined temperature occurs, causes the switch contact 1 to open . The fuse 2 has, for example, a rated current of 2 A.

Im Normalbetrieb, also bei geschlossenem Schaltkontakt 1, fließt, da der Widerstand des Schaltkontaktes 1 vernachlässigbar ist, praktisch der gesamte Strom i über den Schaltkontakt. Der Bemessungsstrom der Hochspannungssicherung 2 kann daher wesentlich geringer als der Nennstrom i sein. Nach einem Öffnen des Schaltkontaktes 1 hingegen fließt der gesamte Nennstrom i über die Schmelzsicherung 2. Der Hochspannungsstromkreis wird somit durch das Öffnen des Schaltkontaktes 1 nicht unterbrochen, sodaß dort kein Lichtbogen auftritt.In normal operation, that is to say with switch contact 1 closed, since the resistance of switch contact 1 is negligible, practically all of the current i flows through the switch contact. The rated current of the high-voltage fuse 2 can therefore be significantly lower than the rated current i. After opening the switch contact 1, however, the entire rated current i flows through the fuse 2. The high-voltage circuit is thus not interrupted by the opening of the switch contact 1, so that no arc occurs there.

Zweckmäßig wird nun eine solche Schmelzsicherung 2 verwendet, die bei Auftreten des Nennstromes i mit Zeitverzögerung anspricht, sodaß sichergestellt ist, daß der Schaltkontakt 1 bereits vollständig geöffnet ist, wenn die Hochspannungssicherung 2 den Stromkreis unterbricht und daher kein Lichtbogen im Schaltkontakt 1 mehr auftritt.Such a fuse 2 is now expediently used, which responds with a time delay when the nominal current i occurs, so that it is ensured that the switch contact 1 is already fully open when the high-voltage fuse 2 breaks the circuit and therefore no arc occurs in the switch contact 1.

Die Hochspannungssicherung ist beispielsweise eine übliche Sicherung, bestehend aus einem mit Messingkappen an den Stirnenden verschlossenen Glasrohr, in dem sich ein Schmelzdraht befindet. Dadurch wird ein Löschen des bei Ansprechen der Hochspannungssicherung auftretenden Lichtbogens im Glasrohr bewirkt.The high-voltage fuse is, for example, a conventional fuse, consisting of a glass tube closed with brass caps at the ends, in which a fuse wire is located. As a result, the arc in the glass tube which occurs when the high-voltage fuse responds is extinguished.

Die Ausführungsform nach Fig.2 unterscheidet sich von der Ausführungsform nach Fig.1 dadurch, daß zwei Schaltkontakte 1', 1'' in Serie geschaltet sind, von welchen der Schaltkontakt 1' beispielsweise bei einem unzulässig hohen Ansteigen einer Temperatur und der Schaltkontakt 1'' beispielsweise bei einem unzulässig hohen Ansteigen eines Druckes anspricht. Durch die Serienschaltung der beiden Schaltkontakte 1', 1'' wird sichergestellt, daß auch bei Ansprechen lediglich eines Schaltkontaktes der gesamte Nennstrom über die Schmelzsicherung fließt, sodaß diese in der in Verbindung mit Fig.1 beschriebenen Weise anspricht. Der in Fig.2 dargestellte Hochspannungsstromkreis wird beispielsweise gleichfalls mit 1000 V Gleichstrom gespeist. Der Nennstrom beträgt beispielsweise 16 A, der Bemessungsstrom der Schmelzsicherung 2 beträgt in diesem Fall beispielsweise 4 A.The embodiment according to FIG. 2 differs from the embodiment according to FIG. 1 in that two switch contacts 1 ', 1' 'are connected in series, of which the switch contact 1', for example when the temperature rises excessively and the switch contact 1 ' 'responds, for example, to an impermissibly high increase in pressure. The series connection of the two switching contacts 1 ', 1' 'ensures that even if only one switching contact responds, the entire rated current flows through the fuse, so that it responds in the manner described in connection with FIG. The high-voltage circuit shown in FIG. 2 is also fed, for example, with 1000 V direct current. The rated current is, for example, 16 A, the rated current of the fuse 2 in this case is, for example, 4 A.

Claims (4)

Einrichtung zum Abschalten eines Hochspannungsstromkreises, vorzugsweise eines mit hoher Gleichspannung gespeisten Stromkreises, mit zumindest einem im Stromkreis angeordneten, in Abhängigkeit von einer Meßgröße, beispielsweise von einer Temperatur oder einem Druck, betätigbaren Schaltkontakt (1;1',1''), dadurch gekennzeichnet, daß dem Schaltkontakt (1) bzw. den Schaltkontakten (1',1'') eine Hochspannungssicherung (2) parallel geschaltet ist, deren Bemessungsstrom geringer ist als der im Hochspannungsstromkreis fließende Nennstrom (i).Device for switching off a high-voltage circuit, preferably a circuit fed with high direct voltage, with at least one switching contact (1; 1 ', 1' ') arranged in the circuit and operable as a function of a measured variable, for example a temperature or a pressure that the switch contact (1) or the switch contacts (1 ', 1' ') is connected in parallel with a high-voltage fuse (2), the rated current of which is lower than the nominal current (i) flowing in the high-voltage circuit. Einrichtung nach Anspruch 1, dadurch gekennzeichnet, daß mehrere in Abhängigkeit von verschiedenen Meßgrößen betätigbare Schaltelemente (1',1'') in Serie geschaltet sind, und daß die Hochspannungssicherung (2) dieser Serienschaltung parallel geschaltet ist.Device according to Claim 1, characterized in that a plurality of switching elements (1 ', 1' ') which can be actuated as a function of different measured variables are connected in series, and in that the high-voltage fuse (2) of this series connection is connected in parallel. Einrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Hochspannungssicherung (2) aus einer Schmelzsicherung besteht.Device according to claim 1 or 2, characterized in that the high-voltage fuse (2) consists of a fuse. Einrichtung nach Anspruch 1, 2 oder 3, dadurch gekennzeichnet, daß die Hochspannungssicherung (2) bei Auftreten des im Hochspannungsstromkreis fließenden Nennenstromes (i) mit Zeitverzögerung anspricht.Device according to claim 1, 2 or 3, characterized in that the high-voltage fuse (2) responds with a time delay when the nominal current (i) flowing in the high-voltage circuit occurs.
EP93890056A 1992-01-16 1993-03-26 Installation to switch off a H.T. circuit Expired - Lifetime EP0620575B1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
AT0005292A AT397003B (en) 1992-01-16 1992-01-16 DEVICE FOR DISCONNECTING A HIGH VOLTAGE CIRCUIT
EP93890056A EP0620575B1 (en) 1992-01-16 1993-03-26 Installation to switch off a H.T. circuit
DE59306842T DE59306842D1 (en) 1993-03-26 1993-03-26 Device for switching off a high-voltage circuit

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT0005292A AT397003B (en) 1992-01-16 1992-01-16 DEVICE FOR DISCONNECTING A HIGH VOLTAGE CIRCUIT
EP93890056A EP0620575B1 (en) 1992-01-16 1993-03-26 Installation to switch off a H.T. circuit

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EP0620575A1 true EP0620575A1 (en) 1994-10-19
EP0620575B1 EP0620575B1 (en) 1997-07-02

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999033079A1 (en) * 1997-12-20 1999-07-01 Leoni Bordnetz-Systeme Gmbh & Co Kg Electric fuse
EP0961380A2 (en) * 1998-05-29 1999-12-01 Alstom Anlagen und Antriebssysteme GmbH Protection circuit arrangement for disconnecting a direct current circuit
US8724266B2 (en) * 2012-08-02 2014-05-13 Renewable Power Conversion, Inc. Photovoltaic switchgear with sacrificial fuse
DE102017214238A1 (en) * 2017-08-16 2019-02-21 Siemens Aktiengesellschaft Short-circuit current limiter and method for operating a short-circuit current limiter

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Publication number Priority date Publication date Assignee Title
GB393951A (en) * 1931-12-14 1933-06-14 Metropolitan Device Corp Improvements in or relating to the rupturing of arcs in fusible arc-rupturing devices employed in conjunction with electric switches
US2012215A (en) * 1934-01-20 1935-08-20 Walter J Barthe Time delay fuse
GB2058496A (en) * 1979-09-11 1981-04-08 Borg Warner High speed switching system
US4516182A (en) * 1981-01-16 1985-05-07 Ga Technologies Inc. Current limiting apparatus

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DE2361203A1 (en) * 1973-12-06 1975-06-12 Siemens Ag Power cct. breaker with arc quenching - has relatively moving contacts forming switching path with parallel resistors
GB1589071A (en) * 1978-03-21 1981-05-07 Ass Elect Ind Electric circuit breakers
JPH0719504B2 (en) * 1988-11-08 1995-03-06 三菱電機株式会社 Disconnector

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB393951A (en) * 1931-12-14 1933-06-14 Metropolitan Device Corp Improvements in or relating to the rupturing of arcs in fusible arc-rupturing devices employed in conjunction with electric switches
US2012215A (en) * 1934-01-20 1935-08-20 Walter J Barthe Time delay fuse
GB2058496A (en) * 1979-09-11 1981-04-08 Borg Warner High speed switching system
US4516182A (en) * 1981-01-16 1985-05-07 Ga Technologies Inc. Current limiting apparatus

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999033079A1 (en) * 1997-12-20 1999-07-01 Leoni Bordnetz-Systeme Gmbh & Co Kg Electric fuse
US6492747B1 (en) 1997-12-20 2002-12-10 Leoni Bordnetz-Systeme Gmbh & Co. Kg Electric fuse
EP0961380A2 (en) * 1998-05-29 1999-12-01 Alstom Anlagen und Antriebssysteme GmbH Protection circuit arrangement for disconnecting a direct current circuit
EP0961380A3 (en) * 1998-05-29 2000-10-18 Alstom Anlagen und Antriebssysteme GmbH Protection circuit arrangement for disconnecting a direct current circuit
US8724266B2 (en) * 2012-08-02 2014-05-13 Renewable Power Conversion, Inc. Photovoltaic switchgear with sacrificial fuse
DE102017214238A1 (en) * 2017-08-16 2019-02-21 Siemens Aktiengesellschaft Short-circuit current limiter and method for operating a short-circuit current limiter

Also Published As

Publication number Publication date
EP0620575B1 (en) 1997-07-02
ATA5292A (en) 1993-05-15
AT397003B (en) 1994-01-25

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