EP1118092B1 - Electric circuit breaker having a data store - Google Patents

Electric circuit breaker having a data store Download PDF

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Publication number
EP1118092B1
EP1118092B1 EP99959194A EP99959194A EP1118092B1 EP 1118092 B1 EP1118092 B1 EP 1118092B1 EP 99959194 A EP99959194 A EP 99959194A EP 99959194 A EP99959194 A EP 99959194A EP 1118092 B1 EP1118092 B1 EP 1118092B1
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EP
European Patent Office
Prior art keywords
circuit breaker
component
switch contact
current sensor
property values
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP99959194A
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German (de)
French (fr)
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EP1118092A1 (en
Inventor
Aaron-Ernst Musiol
Gerhard Tietz
Michael-Alexander Jankowiak
Hans Rehaag
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Siemens AG
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Siemens AG
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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/10—Operating or release mechanisms
    • H01H71/12—Automatic release mechanisms with or without manual release
    • H01H71/123—Automatic release mechanisms with or without manual release using a solid-state trip unit
    • 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
    • H01H71/08—Terminals; Connections
    • H01H2071/086—Low power connections for auxiliary switches, e.g. shunt trip
    • 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
    • H01H71/02—Housings; Casings; Bases; Mountings
    • H01H71/0207—Mounting or assembling the different parts of the circuit breaker
    • H01H71/0228—Mounting or assembling the different parts of the circuit breaker having provisions for interchangeable or replaceable parts
    • 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
    • H01H71/74—Means for adjusting the conditions under which the device will function to provide protection
    • H01H71/7409—Interchangeable elements

Definitions

  • a circuit breaker with the features mentioned is for example made known by WO 97/08725.
  • the information store is located on the outside of the Housing of the overcurrent release and is releasably attached to this.
  • By attaching the information store to the overcurrent release is achieved in a test of a Overcurrent release after its removal from the circuit breaker also included the information store and possible errors are also recorded.
  • an exchange the current transformer of the circuit breaker also the information store exchange or adapt its programming is.
  • An arrangement according to similar measures is required EP 0 493 272 B1, in which a switch-resistant interface card is provided with the one hand the current transformer and the other the overcurrent release must be connected.
  • the information store is part of a on the connecting line attached first component of a two-part Plug device is, the second component of the overcurrent release heard.
  • resistors are the most reliable and simplest belong to electrical components, it seems advantageous to form the information store by means of resistors. These resistors can expediently be located between contact pins switched the first component of the connector his. If, for example, four characteristic property values are to be coded, z. B. the rated current of the circuit breaker, its size, the switching power class and the standard class, a resistor can be provided for this, its resistance value between about 1 ⁇ and about 1 M ⁇ lies, with the resistance values specified levels of the above Property characteristics are assigned. Within the mentioned range of resistance values can be based on this For example, 16 different values without errors establish.
  • the circuit breaker 1 includes an electronic one Overcurrent release 4, which in a known manner Protective device forms around the switch contact 2 when present to open predetermined conditions.
  • This is the overcurrent release 4 through a movable connecting line 5 connected to a current transformer 6 and receives one for evaluation required auxiliary energy either also the current transformer 5 or from one in the example shown additionally provided energy converter 7.
  • a current transformer 6 receives one for evaluation required auxiliary energy either also the current transformer 5 or from one in the example shown additionally provided energy converter 7.
  • Depending on the number of poles of the circuit breaker 1 are one or more current transformers 6 and possibly energy converter 7 available.
  • a first component 10 of a two-part plug device is attached, the associated second component 11 of which is located on the overcurrent release 4.
  • Component 10 also forms an information store for important property characteristic values of circuit breaker 1.
  • appropriately dimensioned resistors are connected between adjacent contact pins of component 10, as is shown in more detail in FIG.
  • Each of the four resistors 12, 13, 14 and 15 shown corresponds to a certain parameter, e.g. B. Rated current, switching power class or standard class.
  • only a single resistor 16 is used instead of resistors 12, 13, 14 and 15.
  • Resistor 16 can be evaluated using a simple auxiliary program in overcurrent release 4. This can happen, for example, in such a way that a read-only memory contained in the overcurrent release 4 contains a tabular assignment of resistance values of the resistor 16, which is read out when the current transformer 6 is connected to the overcurrent release 4 and its activation, and is converted into control signals for programming the microprocessor device contained in the overcurrent release , For reasons of reliable evaluation of the resistors by a logic circuit within the electronic overcurrent release 4, it is advisable to select 12 to 16 1 ⁇ and 1M ⁇ as the limit values for the resistance value of the resistors. This range of resistances can, for example, be divided into 16 values that are recognized without errors.

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Abstract

The invention relates to an electric circuit breaker (1) which comprises an electronic overcurrent release (4) for processing a signal emitted by a current sensor (6). A flexible connecting lead (5) is provided to connect the current sensor (6) to the overcurrent release (4). A first component (10) of a two-part plug-and-socket device is provided at the end of said connecting lead, the second component (11) belonging to the overcurrent release (4). In the first component (10), resistors (12, 13, 14, 15, 16) are arranged between contact pins (17) in order to encode individual characteristic values or combinations of such characteristic values, such as rated current or class of breaking capacity.

Description

Die Erfindung betrifft einen elektrischen Leistungsschalter mit folgenden Merkmalen:

  • eine elektromechanische Baugruppe mit wenigstens einem Schaltkontakt, einer den Schaltkontakt betätigenden Antriebsvorrichtung und zugehörigen Verklinkungseinrichtungen zur Freigabe von Kraftspeichern zum Schließen und Öffnen des Schaltkontaktes,
  • ein Stromsensor zur Erfassung eines über den Schaltkontakt fließenden Stromes,
  • ein elektronischer Überstromauslöser zur Verarbeitung eines Signales des Stromsensors und zur Abgabe eines Signales zur Freigabe der Verklinkungseinrichtung für das Öffnen des Schaltkontaktes,
  • eine bewegliche Verbindungsleitung zur Verbindung des Stromwandlers mit dem Überstromauslöser und
  • ferner mit einem Informationsspeicher zur Übergabe von Eigenschaftskennwerten des Stromwandlers und/oder der elektromechanischen Baugruppe des Leistungsschalters an den Überstromauslöser.
The invention relates to an electrical circuit breaker with the following features:
  • an electromechanical assembly with at least one switch contact, a drive device actuating the switch contact and associated latching devices for releasing force stores for closing and opening the switch contact,
  • a current sensor for detecting a current flowing through the switch contact,
  • an electronic overcurrent release for processing a signal from the current sensor and for emitting a signal for releasing the latching device for opening the switching contact,
  • a movable connecting line for connecting the current transformer with the overcurrent release and
  • furthermore with an information memory for transferring characteristic values of the current transformer and / or the electromechanical assembly of the circuit breaker to the overcurrent release.

Ein Leistungsschalter mit den genannten Merkmalen ist beispielsweise durch die WO 97/08725 bekannt geworden. Hierbei befindet sich der Informationsspeicher an der Außenseite des Gehäuses des Überstromauslösers und ist an diesem lösbar angebracht. Durch die Anbringung des Informationsspeichers an dem Überstromauslöser wird erreicht, dass in eine Prüfung eines Überstromauslösers nach dessen Entfernung aus dem Leistungsschalter auch der Informationsspeicher einbezogen und auch dessen eventuelle Fehler erfasst werden. Bei dieser Vorgehensweise wird davon ausgegangen, dass bei einem Austausch der Stromwandler des Leistungsschalters auch der Informationsspeicher auszutauschen bzw. seine Programmierung anzupassen ist. Ähnliche Maßnahmen erfordert eine Anordnung nach EP 0 493 272 B1, bei der eine schalterfeste Interfacekarte vorgesehen ist, mit der einerseits die Stromwandler und andererseits der Überstromauslöser zu verbinden ist.A circuit breaker with the features mentioned is for example made known by WO 97/08725. in this connection the information store is located on the outside of the Housing of the overcurrent release and is releasably attached to this. By attaching the information store to the overcurrent release is achieved in a test of a Overcurrent release after its removal from the circuit breaker also included the information store and possible errors are also recorded. With this approach it is assumed that an exchange the current transformer of the circuit breaker also the information store exchange or adapt its programming is. An arrangement according to similar measures is required EP 0 493 272 B1, in which a switch-resistant interface card is provided with the one hand the current transformer and the other the overcurrent release must be connected.

Beide unterschiedliche Systeme (WO 97/08725 A1 und EP 0 493 272 B1) beziehen die Stromwandler (bzw. Stromsensoren) nicht zwangsläufig in die zum ordnungsgemäßen Betrieb eines betrachteten Leistungsschalters erforderliche Informationskette ein. Der Erfindung liegt hiervon ausgehend die Aufgabe zu Grunde, die Sicherheit gegen eine fehlerhafte Funktion des Leistungsschalters durch eine verbesserte Übergabe von Parametern an den elektronischen Überstromauslöser zu erhöhen.Both different systems (WO 97/08725 A1 and EP 0 493 272 B1) the current transformers (or current sensors) do not necessarily in the proper operation of one considered Circuit breaker required information chain on. On this basis, the invention is based on the object Reason, the security against a malfunction of the Circuit breaker through an improved transfer of parameters to increase the electronic overcurrent release.

Diese Aufgabe wird gemäß der Erfindung dadurch gelöst, dass der Informationsspeicher Bestandteil einer an der Verbindungsleitung angebrachten ersten Komponente einer zweiteiligen Steckvorrichtung ist, deren zweite Komponente zum Überstromauslöser gehört. Durch den Einbau der Stromwandler in den Leistungsschalter oder den späteren Austausch der Stromwandler wird auf diese Weise der Nenn- oder Bemessungsstrom des Leistungsschalters festgelegt. Zugleich kann dieser Informationsspeicher dazu dienen, weitere Eigenschaftskennwerte festzulegen, wie z. B. die Schaltleistungsklasse oder die Normenklasse des Leistungsschalters. Hierbei ist unter Schaltleistungsklasse eine Bemessung der elektromechanischen Baugruppe entsprechend einem bestimmten geforderten Schaltvermögen, das in kA angegeben wird, zu verstehen. Als Normenklasse wird im vorliegenden Zusammenhang eine Auslegung gemäß bestimmten regionalen Regelwerken verstanden, wie sie insbesondere für den IEC-Markt, den ANSI-Markt oder den UL-Markt gelten. Es sei ferner erwähnt, dass im vorliegenden Zusammenhang als Eigenschaftskennwert eine Kombination eines bestimmten Parameters, z. B. Bemessungsstrom, mit einem Wert des Bemessungsstroms bezeichnet wird.This object is achieved according to the invention in that the information store is part of a on the connecting line attached first component of a two-part Plug device is, the second component of the overcurrent release heard. By installing the current transformers in the circuit breaker or the later replacement of the current transformers in this way becomes the nominal or rated current of the circuit breaker. At the same time, this information store serve further property characteristics determine how z. B. the switching power class or Circuit breaker standard class. Here is below Switching capacity class a dimensioning of the electromechanical Assembly according to a certain required switching capacity, that is stated in kA. As a standard class an interpretation according to understood certain regional regulations, such as in particular for the IEC market, the ANSI market or the UL market be valid. It should also be mentioned that in the present context a combination of a certain characteristic value Parameters, e.g. B. Rated current, with a value of the rated current referred to as.

Da bekanntlich Widerstände zu den zuverlässigsten und einfachsten elektrischen Bauelementen gehören, erscheint es vorteilhaft, den Informationsspeicher durch Widerstände zu bilden. Zweckmäßig können diese Widerstände zwischen Kontaktstifte der ersten Komponente der Steckvorrichtung geschaltet sein. Sind beispielsweise vier Eigenschaftskennwerte zu kodieren, z. B. der Bemessungsstrom des Leistungsschalters, seine Baugröße, die Schaltleistungsklasse und die Normenklasse, so kann hierfür je ein Widerstand vorgesehen sein, dessen Widerstandswert zwischen etwa 1 Ω und etwa 1 MΩ liegt, wobei den Widerstandswerten festgelegte Stufen der genannten Eigenschaftskennwerte zugewiesen sind. Innerhalb der genannten Spanne von Widerstandswerten lassen sich auf diese Weise fehlerfrei beispielsweise 16 unterschiedliche Werte festlegen.As is known, resistors are the most reliable and simplest belong to electrical components, it seems advantageous to form the information store by means of resistors. These resistors can expediently be located between contact pins switched the first component of the connector his. If, for example, four characteristic property values are to be coded, z. B. the rated current of the circuit breaker, its size, the switching power class and the standard class, a resistor can be provided for this, its resistance value between about 1 Ω and about 1 MΩ lies, with the resistance values specified levels of the above Property characteristics are assigned. Within the mentioned range of resistance values can be based on this For example, 16 different values without errors establish.

Sofern nur eine beschränkte Anzahl von Eigenschaftskennwerten zu speichern ist, kann dies nach einer weiteren Ausgestaltung der Erfindung dadurch geschehen, dass nur ein einzelner Widerstand vorgesehen ist, dessen Widerstandswert eine vorbestimmte Kombination von Eigenschaftskennwerten repräsentiert.If only a limited number of property parameters According to a further embodiment, this can be stored the invention happen in that only a single resistor is provided, the resistance value of which is a predetermined one Combination of property characteristics represented.

Es ist bereits ein Steckverbinder zur Verbindung eines medizinischen Sensors mit einem elektronischen Auswertungsgerät bekannt geworden, der ein elektronisches Kodierelement enthält (US 5,660,567 A1). Das Kodierelement vereinfacht den Sensor, weil dieser nun keine Kalibrierungsmittel zu enthalten braucht. Das Anwendungsgebiet des bekannten Steckverbinders ist eine zweiteilige Anordnung (Sensor und Auswertungsgerät), während Gegenstand der vorstehend erläuterten Erfindung eine dreiteilige Anordnung ist, bestehend aus einem elektrischen Leistungsschalter, Stromwandlern zur Messung des über die Strombahn im elektromechanischen Teil des Leistungsschalters fließenden Strom und einem elektronischen Überstromauslöser zur Öffnung von Schaltkontakten. Auch konnte aus dem genannten Dokument eine zur vorstehend erläuterten Erfindung führende Anregung nicht gewonnen werden, weil sich der Anlass und das Ergebnis der bekannten Maßnahme von der Erfindung wesentlich unterscheiden. Insbesondere ist der bekannten Anordnung keine Anregung zu entnehmen, dass ein Verbindungsstecker mit Mitteln zur Kodierung aller Eigenschaftskennwerte ausgerüstet werden kann, die das Zusammenwirken von Leistungsschalter (elektromechanischer Teil), Stromwandler und Überstromauslöser definieren.It is already a connector for connecting a medical Sensors with an electronic evaluation device become known, which contains an electronic coding element (US 5,660,567 A1). The coding element simplifies the Sensor because it does not contain any calibration means needs. The field of application of the known connector is a two-part arrangement (sensor and evaluation device), while the subject of the invention explained above is a three-part arrangement consisting of one electrical circuit breakers, current transformers for measuring the via the current path in the electromechanical part of the circuit breaker flowing electricity and an electronic overcurrent release for opening switch contacts. Also could from the mentioned document to the one explained above Invention leading suggestion cannot be won because of itself the reason and the result of the known measure of the Distinguish invention significantly. In particular, the known one Arrangement no suggestion that a connector with means for coding all property parameters can be equipped that the interaction of Circuit breaker (electromechanical part), current transformer and define overcurrent release.

Die Erfindung wird im Folgenden anhand des in der Figur dargestellten Ausführungsbeispieles näher erläutert.The invention is described below with reference to that shown in the figure Embodiment explained in more detail.

In der Figur sind schematisch in einpoliger Darstellung die Hauptkomponenten eines Niederspannungs-Leistungsschalters gezeigt. Dabei stellt die gestrichelte äußere Kontur den Leistungsschalter 1 als Ganzes dar. Im Inneren befindet sich ein Schaltkontakt 2 und eine mit diesem zusammenwirkende Antriebsvorrichtung 3. Zu dieser gehören nicht dargestellte Federspeicher und Verklinkungen, die von Hand oder ferngesteuert betätigbar sind, um den Schaltkontakt 2 zu schließen bzw. zu öffnen. Ferner gehört zu dem Leistungsschalter 1 ein elektronischer Überstromauslöser 4, der in bekannter Weise eine Schutzeinrichtung bildet, um den Schaltkontakt 2 beim Vorliegen vorbestimmter Bedingungen zu öffnen. Hierzu ist der Überstromauslöser 4 durch eine bewegliche Verbindungsleitung 5 mit einem Stromwandler 6 verbunden und erhält eine zur Auswertung erforderliche Hilfsenergie entweder gleichfalls aus dem Stromwandler 5 oder aus einem in dem gezeigten Beispiel zusätzlich vorgesehenen Energiewandler 7. Je nach der Polzahl des Leistungsschalters 1 sind ein oder mehrere Stromwandler 6 und ggf. Energiewandler 7 vorhanden.In the figure, the are shown schematically in a single-pole representation Main components of a low voltage circuit breaker shown. The dashed outer contour represents the circuit breaker 1 as a whole. Inside is a Switching contact 2 and a drive device interacting with it 3. This includes spring not shown and latches operated by hand or remotely can be actuated to close the switching contact 2 or to open. Furthermore, the circuit breaker 1 includes an electronic one Overcurrent release 4, which in a known manner Protective device forms around the switch contact 2 when present to open predetermined conditions. This is the overcurrent release 4 through a movable connecting line 5 connected to a current transformer 6 and receives one for evaluation required auxiliary energy either also the current transformer 5 or from one in the example shown additionally provided energy converter 7. Depending on the number of poles of the circuit breaker 1 are one or more current transformers 6 and possibly energy converter 7 available.

Am Ende der biegsamen Leitung 5 ist eine erste Komponente 10 einer zweiteiligen Steckvorrichtung angebracht, deren zugehörige zweite Komponente 11 sich an dem Überstromauslöser 4 befindet. Die Komponente 10 bildet zugleich einen Informationsspeicher für wichtige Eigenschaftskennwerte des Leistungsschalters 1. Hierzu sind entsprechend bemessene Widerstände zwischen benachbarte Kontaktstifte der Komponente 10 geschaltet, wie dies näher in der Figur 2 gezeigt ist. Jeder der vier gezeigten Widerstände 12, 13, 14 und 15 entspricht hierbei einem bestimmten Parameter, z. B. Bemessungsstrom, Schaltleistungsklasse oder Normenklasse. Demgegenüber wird in der Ausführung der Komponente 10 der Steckvorrichtung gemäß der Figur 3 anstelle der Widerstände 12, 13, 14 und 15 nur ein einzelner Widerstand 16 benutzt. Dieser repräsentiert eine bestimmte Kombination von Eigenschaftskennwerten, was sich in vielen Fällen als ausreichend erweist und somit eine besonders einfache Art der Kodierung darstellt. Die Auswertung des Widerstandes 16 kann mittels eines einfachen Hilfsprogramms im Überstromauslöser 4 erfolgen. Dies kann beispielsweise so geschehen, dass ein im Überstromauslöser 4 enthaltener Festwertspeicher eine tabellarische Zuordnung von Widerstandswerten des Widerstandes 16 enthält, die bei bestehender Verbindung des Stromwandlers 6 mit dem Überstromauslöser 4 und dessen Aktivierung ausgelesen und in Steuersignale zur Programmierung der im Überstromauslöser enthaltenen Mikroprozessoreinrichtung umgesetzt wird.
Aus Gründen einer zuverlässigen Auswertung der Widerstände durch eine Logikschaltung innerhalb des elektronischen Überstromauslösers 4 empfiehlt es sich, als Grenzwerte für den Widerstandswert der Widerstände 12 bis 16 1Ω und 1MΩ zu wählen. Dieser Bereich von Widerständen lässt sich beispielsweise in 16 Werte gliedern, die fehlerfrei erkannt werden.At the end of the flexible line 5, a first component 10 of a two-part plug device is attached, the associated second component 11 of which is located on the overcurrent release 4. Component 10 also forms an information store for important property characteristic values of circuit breaker 1. For this purpose, appropriately dimensioned resistors are connected between adjacent contact pins of component 10, as is shown in more detail in FIG. Each of the four resistors 12, 13, 14 and 15 shown corresponds to a certain parameter, e.g. B. Rated current, switching power class or standard class. In contrast, in the embodiment of component 10 of the plug device according to FIG. 3, only a single resistor 16 is used instead of resistors 12, 13, 14 and 15. This represents a certain combination of characteristic values, which in many cases proves to be sufficient and thus represents a particularly simple type of coding. Resistor 16 can be evaluated using a simple auxiliary program in overcurrent release 4. This can happen, for example, in such a way that a read-only memory contained in the overcurrent release 4 contains a tabular assignment of resistance values of the resistor 16, which is read out when the current transformer 6 is connected to the overcurrent release 4 and its activation, and is converted into control signals for programming the microprocessor device contained in the overcurrent release ,
For reasons of reliable evaluation of the resistors by a logic circuit within the electronic overcurrent release 4, it is advisable to select 12 to 16 1Ω and 1MΩ as the limit values for the resistance value of the resistors. This range of resistances can, for example, be divided into 16 values that are recognized without errors.

Claims (4)

  1. Electric circuit breaker (1) having the following features:
    an electromechanical assembly having at least one switch contact (2), a drive device (3) that actuates the switch contact (2) and associated latching devices for releasing energy storage mechanisms for closing and opening the switch contact (2),
    a current sensor (6) for detecting a current flowing via the switch contact (2),
    an electronic overcurrent trip (4) for processing a signal of the current sensor (6) and for delivering a signal for releasing the latching device for opening the switch contact (2),
    a movable connecting line (5) for connecting the current sensor (6) to the overcurrent trip (4),
    having, furthermore, an information store for transferring characteristic property values of the current sensor (6) and/or the electromechanical assembly of the circuit breaker (1) to the overcurrent trip (4),
    characterized in that
    the information store is a part of a first component (10), provided on the connecting line (5), of a two-part plug device whose second component (11) belongs to the overcurrent trip (4).
  2. Circuit breaker according to Claim 1, characterized in that the information store is formed by at least one resistor (12, 13, 14, 15; 16) that is connected between contact pins (17) of the first component (10) of the plug device.
  3. Circuit breaker according to Claim 2, characterized in that there is provided for each of the characteristic property values to be encoded, in particular for the rated current of the circuit breaker (1), the overall size of the circuit breaker (1), the make-and-break category of the electromechanical assembly and the standards category, a respective resistor (12, 13, 14, 15) whose resistance value is between about 1 Ω and about 1 MΩ, fixed steps in the said characteristic property values being allocated to the resistance values.
  4. Circuit breaker according to Claim 2 or 3, characterized in that a single resistor (16) is provided whose resistance value represents a predetermined combination of characteristic property values.
EP99959194A 1998-09-30 1999-09-30 Electric circuit breaker having a data store Expired - Lifetime EP1118092B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19845799 1998-09-30
DE19845799A DE19845799A1 (en) 1998-09-30 1998-09-30 Electrical circuit breaker with an information store
PCT/DE1999/003240 WO2000019474A1 (en) 1998-09-30 1999-09-30 Electric circuit breaker having a data store

Publications (2)

Publication Number Publication Date
EP1118092A1 EP1118092A1 (en) 2001-07-25
EP1118092B1 true EP1118092B1 (en) 2002-04-10

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US (1) US6639775B1 (en)
EP (1) EP1118092B1 (en)
JP (1) JP2002526887A (en)
DE (2) DE19845799A1 (en)
WO (1) WO2000019474A1 (en)

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US5495396A (en) * 1995-02-06 1996-02-27 General Electric Company Circuit breaker trip unit connector clips
EP0847587B1 (en) 1995-08-31 1999-02-24 Siemens Aktiengesellschaft Power circuit-breaker with current transformers and data store
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US6639775B1 (en) 2003-10-28
WO2000019474A1 (en) 2000-04-06
DE59901224D1 (en) 2002-05-16
JP2002526887A (en) 2002-08-20
EP1118092A1 (en) 2001-07-25
DE19845799A1 (en) 2000-04-13

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