PatentDe  


Dokumentenidentifikation EP1444708 16.06.2005
EP-Veröffentlichungsnummer 0001444708
Titel EINSTECKEINHEIT-BAUGRUPPE MIT MESSTRANSFORMATOREN
Anmelder ABB Oy, Helsinki, FI
Erfinder KANGAS, Simo, 65350 Vaasa, FI
Vertreter derzeit kein Vertreter bestellt
DE-Aktenzeichen 60300648
Vertragsstaaten DE, FR, GB
Sprache des Dokument EN
EP-Anmeldetag 06.11.2003
EP-Aktenzeichen 037934510
WO-Anmeldetag 06.11.2003
PCT-Aktenzeichen PCT/FI03/00836
WO-Veröffentlichungsnummer 0004042751
WO-Veröffentlichungsdatum 21.05.2004
EP-Offenlegungsdatum 11.08.2004
EP date of grant 11.05.2005
Veröffentlichungstag im Patentblatt 16.06.2005
IPC-Hauptklasse H01F 38/20
IPC-Nebenklasse H05K 7/14   G01R 11/04   G01R 15/12   

Beschreibung[en]
BACKGROUND OF THE INVENTION

The invention relates to plug-in unit assemblies comprising instrument transformers, and particularly to protective relay assemblies comprising a plug-in unit.

Different protective relay versions comprise a varying number of current and voltage transformers. Their connectors are subject to the requirement that the current circuits must close when the plug-in unit is being extracted, but, correspondingly, the voltage circuits must not short. In known solutions, a connector adapted to connect current and voltage transformers has to be assembled for each combination from different current and voltage connector components and, in addition, the modules have to be coded in order to prevent a module from being inserted into the wrong connection slot. Examples of known assemblies are described in publications US 5 923 526 and FR 2 745 911.

The problem in the above-described arrangement is that current and voltage transformers require different mating connectors. Another problem is the cost caused by the coding of modules. For example, if an assembly comprises six transformer slots having current or voltage transformers, the number of combinations is large, requiring an expensive mechanical coding system including set-ups and maintenance.

BRIEF DESCRIPTION OF THE INVENTION

The object of the invention is thus to provide a plug-in unit assembly comprising instrument transformers so as to solve the above problems. The object of the invention is achieved with an assembly, which is characterized in what is stated in the independent claim. Preferred embodiments of the invention are described in the dependent claims.

The invention is based on the current and voltage transformers using a similar connector, whereby the desired shorting of the current circuits when the plug-in unit is being extracted takes place on the basis of the coding of the instrument transformers of the plug-in unit.

The advantage of the plug-in unit assembly of the invention is that the current and voltage transformers are connectible to an identical connector. The use of an identical connector for both current and vdltage transformers also enables lower costs.

BRIEF DESCRIPTION OF THE FIGURES

In the following, a preferred embodiment of the invention will be described in detail with reference to the accompanying drawings, in which

  • Figure 1 shows an assembly according to an embodiment of the invention comprising instrument transformers, a case assembly and a plug-in unit;
  • Figure 2 shows a situation where the intention is to connect the plug-in unit of Figure 1 to a case assembly whose connector assembly has been coded by the use of a plug-in unit provided with a different instrument transformer combination;
  • Figure 3 shows the body of the plug-in unit of the assembly of Figure 1 and an instrument transformer to be connected thereto;
  • Figure 4 shows the connector assembly of the assembly of Figure 1;
  • Figure 5 shows the body of the case assembly of Figure 1 and a connector assembly according to Figure 4 to be connected thereto; and
  • Figures 6a to 6c show the structure of the short-circuit element of the assembly of Figure 1.

DETAILED DESCRIPTION OF THE INVENTION

The assembly of Figure 1 comprises a case assembly 1 and a plug-in unit 2 configured for insertion therein. The case assembly 1 comprises a connector assembly 10, and the plug-in unit 2 comprises six instrument transformers configured for connection to the connector assembly 10 of the case assembly 1. The instrument transformers of the plug-in unit 2 comprise three current transformers 3 and three voltage transformers 4. The coil former structures of the current transformers 3 and the voltage transformers 4 are different.

For each instrument transformer 3 and 4, the connector assembly 10 comprises a short-circuit element 5 having a basic state and two operational states. The short-circuit elements 5 are configured to operate together with the instrument transformers 3 and 4 such that the operational state of each short-circuit element 5 is determined based on whether it is an instrument transformer to be connected to the short-circuit element 5 when in its initial position, a current transformer 3 or a voltage transformer 4. When a current transformer 3 is connected to a short-circuit element 5 in the basic state, the short-circuit element 5 switches to an operational state wherein it shorts the current circuit when the plug-in unit 2 is being extracted, and wherein it opens the current circuit when the plug-in unit 2 is being inserted such that the current circuit circulates via the current transformer 3. Correspondingly, when a voltage transformer 4 is connected to a short-circuit element 5 in the basic state, the short-circuit element 5 switches to an operational state wherein it does not short the voltage circuit in any situation. Different types of instrument transformers rotate the short-circuit elements 5 in different directions from their basic state in accordance with Figure 1.

The assembly of Figure 1 is arranged such that the first time that the plug-in unit 2 is connected to the case assembly 1 causes changes in the connector assembly 10 of the case assembly 1, which in the future prevent such plug-in units 2 from being connected to the case assembly 1 that contain a combination of current transformers 3 and voltage transformers 4 that differs from what the plug-in unit 2 connected to the case assembly 1 the first time contained.

To prevent a plug-in unit 2 having the wrong type of instrument transformer combination from being connected, the short-circuit elements 5 of Figure 1 are no longer restored to the basic state once they change over from it. For the same reason, the rotation of the short-circuit elements 5 farther than their operational position is prevented.

Alternatively, it is possible to achieve the plug-in unit assembly comprising instrument transformers according to the invention, wherein the plug-in unit 2 to be connected to the case assembly 1 for the first time does not code the case assembly 1, whereby the case assembly 1 also allows plug-in units 2 comprising different instrument transformer combinations to be connected thereto in the future. Such an arrangement may prove useful in special cases, wherein a given case assembly 1 is to be used with plug-in units 2 comprising a plurality of different instrument transformer combinations without the need to make changes in the connector assembly 10 of the case assembly 1 when switching to use the following plug-in unit 2. It is evident that in such solutions, the case assembly 1 has to be capable of identifying the types of the instrument transformers of the plug-in unit 2 each time the plug-in unit 2 is inserted into the case assembly 1, and to short the contacts corresponding to the current transformers 3 when the plug-in unit 2 is being detached.

Furthermore, it is possible to achieve the plug-in unit assembly comprising instrument transformers according to the invention, which is a kind of hybrid of two of the above-presented alternatives. Such an assembly operates otherwise essentially in the same way as the above-presented first assembly, but it additionally comprises special means for decoding the coding of the case assembly 1. An assembly provided with decoding means thus operates such that when the plug-in unit 2 is connected to the case assembly 1 for the first time, the connector assembly 10 of the case assembly 1 is coded to correspond to said plug-in unit 2, after which an other type of plug-in unit 2 can no longer be connected to the case assembly 1 without first decoding the coding of the connector assembly 10 by using the decoding means. After the decoding, a plug-in unit 2 provided with any kind of instrument transformer combination can be connected to the case assembly 1.

Figure 2 shows a situation where the plug-in unit 2 of Figure 1, comprising three current transformers 3 and three voltage transformers 4, is to be connected to a case assembly 1, whose connector assembly 10 is coded with a plug-in unit 2 comprising six current transformers 3. Figure 2 shows that the insertion of the plug-in unit 2 into the case assembly 1 fails, since the coding brackets 13 of the three voltage transformers 4, seen on the right side in the figure, hit the rotating means 9 of the corresponding short-circuit elements 5.

In the assemblies shown in Figures 1 and 2, the rotating means 9 are used for both rotating the short-circuit elements 5 to the desired operational state and for preventing the insertion of a plug-in unit 2 having an instrument transformer combination of the wrong type into the case assembly 1. If desired, separate means can also be used for these purposes. In addition, when desired, the means used to prevent the coupling of a plug-in unit 2 comprising an instrument transformer combination of the wrong type may comprise means separate from the short-circuit element 5.

Figure 3 shows the body of the plug-in unit 2 of Figure 1 and a current transformer 3 to be connected thereto. Figure 3 shows that in the solution illustrated, the instrument transformer is inserted into a corresponding slot in the body of the plug-in unit 2 perpendicularly to the direction in which the plug-in unit 2 is configured for insertion into the case assembly 1.

Figure 4 shows the connector assembly 10 of the case assembly 1 of Figure 1. For each instrument transformer configured for connection thereto, the connector assembly 10 of Figure 4 comprises a short-circuit element 5 and a pair of contacts 11, the first contact being adapted to be connected to the first terminal of the corresponding instrument transformer, and the second terminal being adapted to be connected to the second of the instrument transformer. In Figure 4, all short-circuit elements 5 are in the basic state, all rotating means 9 of the short-circuit elements pointing in the same direction, i.e. in the direction from which the instrument transformers are configured to approach the short-circuit elements 5 when the plug-in unit 2 is being inserted into the case assembly 1.

The contacts of the pair of contacts 11 are naturally connected to contacts on the outer surface of the case assembly 1 in an electrically conductive manner, the contacts being configured for coupling to the desired voltage or current circuit.

The connector assembly 10 of the plug-in unit assembly of the invention comprising instrument transformers may comprise means for ensuring that the short-circuit elements 5 remain in their desired operational states. Such means are arranged specifically to prevent the unintentional transition of the short-circuit elements 5 from the desired operational states. Alternatively, the means for ensuring that the short-circuit elements 5 remain in the desired operational states may comprise means that are partly or entirely separate from the connector assembly 10.

Figure 5 shows the body of the case assembly 1 of Figure 1 and the connector assembly 10 of Figure 4 to be connected thereto. Figure 5 shows that in the solution described, the connector assembly 10 is inserted into the body of the case assembly 1 from a direction opposite to the direction in which the plug-in unit 2 is configured for insertion into the case assembly 1.

Figures 6a to 6c show the structure of the short-circuit element 5 of the assembly of Figure 1. The short-circuit element 5 comprises a substantially cylindrical body, 6, a spring means 7, a short-circuit bit 8, which is configured to short the pair of contacts 11 corresponding to said short-circuit element 5 when needed and which the spring means 7 presses outwards from the body 6 in an operational state, and a rotating means 9 configured to rotate the short-circuit element 5 around the rotational axis of the cylindrical body 6.

The body 6 of the short-circuit element 5 of Figures 6a to 6c comprises a cavity 12 arranged to receive the spring means 7 and the short-circuit bit 8. In the example of Figures 6a to 6c, the spring means 7 is a helical spring to be placed in the cavity 12 of the body 6 of the short-circuit element 5, after which the short-circuit bit 8 is pushed in the radial direction of the body towards the spring means 7 and the midpoint of the body of the short-circuit element 5, whereby the spring means 7 is tensioned. However, it is evident that also another type of spring can be used as the spring means 7, such as for instance a flat spring. It is further evident that the spring means 7 and the short-circuit bit 8 do not necessarily have to be located in the cavity 12 of the body 6 of the short-circuit element 5.

The short-circuit element 5 shown in Figures 6a to 6c is configured to short the corresponding pair of contacts 11 such that in a situation where the orifice of the cavity 12 is substantially towards the imagined midline of the pair of contacts 11, the short-circuit bit 8 is allowed to move outwards from the cavity 12 pushed by the spring means 7, whereby the short-circuit bit 8 is coupled to both contacts of the pair of contacts 11 thus shorting said pair of contacts. The short-circuit bit 8 is coupled to the parts of the pair of contacts 11 that are directed upwards and located at the front in Figure 4.

It is evident that to achieve the desired shorting properties, the short-circuit bit 8, or at least a given part of its surface, has to be electrically conductive.

The short-circuit element 5 connected to the voltage transformer 4 must not short the corresponding pair of contacts 11 in any situation. In the embodiment presented, said property is accomplished such that in an operational state corresponding to the voltage transformer 4, the short-circuit element 5 is rotated to a position where the cavity 12 of the short-circuit element 5 and the short-circuit bit 8 therein are directed away from the direction enabling shorting.

As was stated above, the short-circuit elements 5 are to short the pairs of contacts 11 corresponding to the current circuits only when no plug-in unit 2 is connected to the case assembly 1. In the embodiment presented, this property is implemented in such a manner that in an operational state corresponding to the current transformer 3, the short-circuit element 5 is rotated in a position where the spring means 7 pushes the short-circuit bit 8 substantially towards the imagined midline of the pair of contacts 11, and the coil body structure of the current transformers 3 is arranged such that when the current transformer 3 is connected to the connector assembly 10, its coil body structure pushes the short-circuit bit 8 deeper into the cavity 12 such that the short-circuit bit 8 reaches a position wherein it does not short the contacts of the pair of contacts 11. Correspondingly, in a situation wherein the plug-in unit 2 is detached from the case assembly 1 and the coil body structure of the current transformer 3 does not push the short-circuit bit 8 inwards, the short-circuit bit 8 of the short-circuit element 5 extends into a position wherein it shorts the contacts of the pair of contacts 11 corresponding to said short-circuit element 5.

In the short-circuit element 5 shown in Figure 6, the rotating means 9 is a pin fastened at an end of the substantially cylindrical body 6 adjacent the edge, the longitudinal axis of the pin being substantially parallel to the axis of rotation of the cylindrical body 6.

It is evident that the implementation of the short-circuit element 5 may deviate from the one shown in Figure 6. The rotating means 9 does not necessarily have to be pin-like or located at the end of the body of the short-circuit element 5. The rotating means 9 may be located for instance on a side surface of the short-circuit element 5 and be disc-like, for example. Furthermore, it is to be noted that, when desired, the body 6 of the short-circuit element 5 may have another shape than cylindrical. It is essential in the design of the short-circuit element 5 that it is capable of operating together with the instrument transformers 3 and 4 employed.

In the embodiment presented, the coding of the instrument transformers 3 and 4 is implemented by the coil body structures of the current transformers 3 and voltage transformers 4 being different. More exactly expressed, the coil body structure of the instrument transformers 3 and 4 of the embodiment presented comprises a coding bracket 13 having a front edge shaped like a bevelled rectangle. In the solution of the embodiment presented, the current transformers 3 and voltage transformers 4 are coded to differ from each other by bevelling the front edges of their coding brackets 13 at corners on different sides.

The instrument transformers may naturally be coded in another manner than the one presented above. An alternative manner of implementation is to provide those connector means with which each current transformer is connected to the connector assembly 10 with a structure enabling identification.

In the embodiment presented, the instrument transformers 3 and 4 are arranged to be placed in the plug-in unit 2 such that the front edge of the coding bracket 13 encounters the rotating means 9 of the short-circuit element 5 when the plug-in unit 2 is being inserted into the case assembly 1. Figures 1 to 3 show that the front edges of the coding brackets 13 are bevelled so that the bevelled part extends to the midline of the coding bracket 13. Herein, the midline refers to the geometrical midline of the coding bracket 13 in a direction extending from the coil body to the front edge of the coding bracket 13. Since the coding brackets 13 of the current transformers 3 and the voltage transformers 4 are bevelled at different comers, the current transformers 3 and the voltage transformers 4 rotate the short-circuit elements 5 they encounter in different directions as is shown in Figure 1.

As Figure 1 in particular shows, the coding brackets 13 of the instrument transformers 3 and 4 are arranged to rotate the short-circuit elements 5 to positions corresponding to the types of the instrument transformers so that the bevelled part of each coding bracket 13 hits the rotating means 9 of the short-circuit element 5, whereby, when the instrument transformer and its coding bracket 13 are pushed further towards the short-circuit means, the bevelled part of the coding bracket 13 rotates the rotating means 9 in the direction of the bevelled edge. In order for the coding bracket 13 to hit the rotating means at the bevelled part, it is important in the solution of the embodiment presented that the front edge of the coding bracket 13 is bevelled at least up to the midline, as was mentioned above.

As was mentioned above, in the embodiment presented, when rotated to their operational state, the short-circuit elements 5 of the case assembly 1 prevent the insertion of a plug-in unit 2 having the wrong kind of instrument transformer combination into the case assembly. Figure 2 shows that this preventive effect is based on the fact that the unbevelled parts of the front edges of the coding brackets 13 of the wrong type of instrument transformers hit the corresponding rotating means 9, whereby the plug-in unit 2 is unable to extend all the way to the bottom.

It is obvious to a person skilled in the art that the basic idea of the invention can be implemented in a variety of ways. The invention and its embodiments are thus not limited to the above examples, but may vary within the claims.


Anspruch[de]
  1. Einsteckeinheit-Baugruppe mit Messwandlern, umfassend eine Gehäuseanordnung (1) mit einer Verbinderanordnung (10) und eine mindestens einen Messwandler (3, 4) aufweisende Einsteckeinheit (2), welche zur Verbindung mit der Gehäuseanordnung (1) ausgestaltet ist, wobei der mindestens eine Messwandler (3, 4) dazu ausgelegt ist, beim Einsetzen der Einsteckeineinheit (2) in die Gehäuseanordnung (1) mit der Verbinderanordnung (10) in Verbindung zu treten, und wobei er aus einer Menge ausgewählt ist, die Stromwandler (3) und Spannungswandler (4) umfasst,dadurch gekennzeichnet, dass die Menge, aus der der mindestens eine Messwandler (3, 4) der Einsteckeinheit (2) ausgewählt ist, aus Messwandlern zusammengesetzt ist, welche in derartiger Weise codiert sind, dass die Codierungen der Stromwandler (3) und der Spannungswandler (4) unterschiedlich sind, und dass die Verbinderanordnung (10) dazu fähig ist, beim Verbinden der Einsteckeinheit (2) mit der Gehäuseanordnung (1) den Typ des mindestens einen Messwandlers (3, 4) basierend auf dessen Codierung zu identifizieren.
  2. Baugruppe nach Anspruch 1, dadurch gekennzeichnet, dass die Baugruppe derart ausgebildet ist, dass die erstmalige Verbindung der Einsteckeinheit (2) mit der Gehäuseanordnung (1) Änderungen der Verbinderanordnung (10) bewirkt, die auf einer anhand der Codierung der Messwandler (3, 4) erfolgten Typenidentifizierung beruhen und beim Trennen der mit der Gehäuseanordnung (1) verbundenen Einsteckeinheit (2) von der Gehäuseanordnung (1) bewirken, dass die Verbinderanordnung (10) den einem jeweiligen Stromwandler (3) entsprechenden Stromkreis kurzschließt und den einem jeweiligen Spannungswandler (4) entsprechenden Spannungskreis offenlässt.
  3. Baugruppe nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die Codierung der unterschiedlichen Arten von Messwandlern (3, 4) dadurch vorgenommen ist, dass die Spulenkörperstrukturen der Stromwandler (3) und der Spannungswandler (4) sich voneinander unterscheiden.
  4. Baugruppe nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass die Baugruppe derart ausgebildet ist, dass bei erstmaliger Verbindung der Einsteckeinheit (2) mit der Gehäuseanordnung (1) Änderungen der Verbinderanordnung (10) der Gehäuseanordnung (1) auftreten, die die zukünftige Verbindung einer Einsteckeinheit (2), welche eine andere Kombination von Stromwandlern (3) und Spannungswandlern (4) als diejenige Einsteckeinheit (2) aufweist, die beim ersten Mal mit der Gehäuseanordnung (1) verbunden wurde, mit der Gehäuseanordnung (1) verhindern.
  5. Baugruppe nach Anspruch 4, dadurch gekennzeichnet, dass die Verbinderanordnung (10) für jeden mit ihr zu verbindenden Messwandler (3, 4) ein Kurzschlusselement (5) sowie ein Paar von Kontakten (11) aufweist, wobei der erste Kontakt zur Verbindung mit einem ersten Anschluss des entsprechenden Messwandlers (3, 4) ausgestaltet ist und der zweite Kontakt zur Verbindung mit einem zweiten Anschluss des Messwandlers (3, 4) ausgestaltet ist, wobei bei erstmaliger Verbindung der Einsteckeinheit (2) mit der Gehäuseanordnung (1) das einem jeweiligen Spannungswandler (4) entsprechende Kurzschlusselement (5) in einen Betriebszustand umschaltet, in dem es das entsprechende Kontaktpaar (11) in keiner Situation kurzschließt, wohingegen das einem jeweiligen Stromwandler (3) entsprechende Kurzschlusselement (5) in einen Betriebszustand umschaltet, in dem es beim Trennen der Einsteckeinheit (2) von der Gehäuseanordnung (1) das entsprechende Kontaktpaar (11) kurzschließt und entsprechend beim Verbinden der Einsteckeinheit (2) mit der Gehäuseanordnung (1) den Kurschluss des Kontaktpaars (11) aufhebt, wodurch der Stromkreis über den Stromwandler (3) gehen kann.
  6. Baugruppe nach Anspruch 4, dadurch gekennzeichnet, dass jedes Kurzschlusselement (5) einen im wesentlichen zylindrischen Körper (6), eine zum bedarfsweisen Kurzschließen des dem Kurzschlusselement (5) entsprechenden Kontaktpaars (11) ausgestaltete Kurzschlussspitze (8), ein Federmittel (7), welches dazu ausgelegt ist, die Kurschlussspitze (8) im wesentlichen in radialer Richtung des Körpers (6) nach außen zu drücken, sowie ein Rotiermittel (9) umfasst, welches dazu ausgebildet ist, das Kurzschlusselement (5) um die Drehachse des zylindrischen Körpers (6) zu drehen.
  7. Baugruppe nach Anspruch 5, dadurch gekennzeichnet, dass der Körper (6) des Kurzschlusselements einen Hohlraum (12) aufweist, welcher zur wenigstens teilweisen Aufnahme des Federmittels (7) und der Kurzschlussspitze (8) ausgelegt ist.
  8. Baugruppe nach Anspruch 3, dadurch gekennzeichnet, dass die Spulenkörperstruktur jedes Messwandlers (3, 4) ein Codierstück (13) aufweist, welches bei Betrachtung aus einer gegebenen Richtung wie ein Rechteck gestaltet ist, dessen eine vordere Ecke abgeschrägt ist, derart, dass sich der abgeschrägte Teil zumindest bis zur gedachten Mittellinie des Codierstücks (13) erstreckt.
Anspruch[en]
  1. A plug-in unit assembly comprising instrument transformers, including a case assembly (1) comprising a connector assembly (10), and a plug-in unit (2) comprising at least one instrument transformer (3, 4) and configured to be connected to the case assembly (1), whereby, when the plug-in unit (2) is being inserted into the case assembly (1), said at least one instrument transformer (3, 4) is configured to be connected to the connector assembly (10) and is selected from a set comprising current transformers (3) and voltage transformers (4), characterized in that the set from which said at least one instrument transformer (3, 4) of the plug-in unit (2) is selected, is composed of instrument transformers coded in such a manner that the codings of the current transformers (3) and the voltage transformers (4) are different, and in that the connector assembly (10) is capable of identifying the type of said at least one instrument transformer (3, 4) based on its coding when the plug-in unit (2) is being connected to the case assembly (1).
  2. An assembly as claimed in claim 1, characterized in that the assembly is arranged such that the connection of the plug-in unit (2) for the first time to the case assembly (1) achieves changes in the connector assembly (10), which are based on a type identification carried out based on the coding of the instrument transformers (3, 4), and which, when the plug-in unit (2) connected to the case assembly (1) is being detached from the case assembly (1 ), cause the connector assembly (10) to short the current circuit corresponding to each current transformer (3) and to leave open the voltage circuit corresponding to each voltage transformer (4).
  3. An assembly as claimed in claim 1 or 2, characterized in that the coding of the different kinds of instrument transformers (3, 4) is implemented by the coil body structures of the current transformers (3) and the voltage transformers (4) being different from each other.
  4. An assembly as claimed in any one of claims 1 to 3, characterized in that the assembly is arranged such that when the plug-in unit (2) is connected for the first time to the case assembly (1), changes occur in the connector assembly (10) of the case assembly (1), which in the future prevent the connection of such a plug-in unit (2) to the case assembly (1) that comprises a different combination of current transformers (3) and voltage transformers (4) than did the plug-in unit (2) that was connected to the case assembly (1) for the first time.
  5. An assembly as claimed in claim 4, characterized in that for each instrument transformer (3, 4) to be connected thereto, the connector assembly (10) comprises a short-circuit element (5) and a pair of contacts (11), the first contact being configured to be connected to a first terminal of the corresponding instrument transformer (3, 4), and the second contact being configured to be connected to a second terminal of the instrument transformer (3, 4), whereby, when the plug-in unit (2) is connected for the first time to the case assembly (1), the short-circuit element (5) corresponding to each voltage transformer (4) switches to an operational state wherein it does not short the corresponding pair of contacts (11) in any situation, whereas the short-circuit element (5) corresponding to each current transformer (3) switches to an operational state wherein it shorts the corresponding pair of contacts (11) when the plug-in unit (2) is being detached from the case assembly (1), and, correspondingly, when the plug-in unit (2) is being connected to the case assembly (1), removes the short circuiting of the pair of contacts (11), allowing the current circuit to circulate via the current transformer (3).
  6. An assembly as claimed in claim 4, characterized in that each short-circuit element (5) comprises a substantially cylindrical body (6), a short-circuit bit (8) configured to short the pair of contacts (11) corresponding to said short-circuit element (5) when necessary, a spring means (7) configured to push the short-circuit bit (8) outwards substantially in the radial direction of the body (6), and a rotating means (9) configured to rotate the short-circuit element (5) around the axis of rotation of the cylindrical body (6).
  7. An assembly as claimed in claim 5, characterized in that the body (6) of the short-circuit element comprises a cavity (12) configured to receive the spring means (7) and the short-circuit bit (8) at least partly.
  8. An assembly as claimed in claim 3, characterized in that the coil body structure of each instrument transformer (3, 4) comprises a coding bracket (13), which, seen from a given direction, is shaped like a rectangle whose one front comer is bevelled such that the bevelled part extends at least up to the imagined midline of the coding bracket (13).
Anspruch[fr]
  1. Ensemble d'unité enfichable avec transformateurs de mesure, comprenant un ensemble de boîtier (1) comprenant un ensemble de connecteur (10), et une unité enfichable (2) comprenant au moins un transformateur de mesure (3, 4) et configurée pour se connecter à l'ensemble de boîtier (1), de manière à ce que, quand l'unité enfichable (2) est insérée dans l'ensemble de boîtier (1), ledit au moins un transformateur de mesure (3, 4) soit configuré pour se connecter à l'ensemble de connecteur (10) et soit sélectionné dans un groupe comprenant des transformateurs de courant (3) et des transformateurs de tension (4), caractérisé en ce que le groupe dans lequel ledit au moins un transformateur de mesure (3, 4) de l'unité enfichable (2) est sélectionné, se compose de transformateurs d'instrument codés de telle sorte que les codages des transformateurs de courant (3) et des transformateurs de tension (4) sont différents, et en ce que l'ensemble de connecteur (10) est capable d'identifier le type dudit au moins un transformateur d'instrument (3, 4) sur la base de son codage quand l'unité enfichable (2) est connectée à l'ensemble de boîtier (1).
  2. Ensemble selon la revendication 1, caractérisé en ce que l'ensemble est agencé de telle sorte que le fait de connecter l'unité enfichable (2) pour la première fois à l'ensemble de boîtier (1) réalise des changements dans l'ensemble de connecteur (10) qui sont basés sur une identification de type effectuée sur la base du codage des transformateurs de mesure (3, 4) et qui, quand l'unité enfichable (2) connectée à l'ensemble de boîtier (1) est détachée de l'ensemble de boîtier (1), amène l'ensemble de connecteur (10) à court-circuiter le circuit de courant correspondant à chaque transformateur de courant (3) et à laisser ouvert le circuit de tension correspondant à chaque transformateur de tension (4).
  3. Ensemble selon la revendication 1 ou 2, caractérisé en ce que le codage des différents types de transformateurs de mesure (3, 4) est mis en oeuvre en ce que les structures de corps de bobine des transformateurs de courant (3) et des transformateurs de tension (4) sont différentes l'une de l'autre.
  4. Ensemble selon l'une quelconque des revendications 1 à 3,caractérisé en ce que l'ensemble est agencé de telle sorte que, quand l'unité enfichable (2) est connectée pour la première fois à l'ensemble de boîtier (1), des changements se produisent dans l'ensemble de connecteur (10) de l'ensemble de boîtier (1) qui empêcheront ultérieurement la connexion d'une telle unité enfichable (2) à l'ensemble de boîtier (1) qui comprend une combinaison différente de transformateurs de courant (3) et de transformateurs de tension (4) que l'unité enfichable (2) qui était connectée à l'ensemble de boîtier (1) la première fois.
  5. Ensemble selon la revendication 4, caractérisé en ce que pour chaque transformateur de mesure (3, 4) à connecter à celui-ci, l'ensemble de connecteur (10) comprend un élément de court-circuit (5) et une paire de contacts (11), le premier contact étant configuré pour être connecté à une première borne du transformateur de mesure correspondant (3, 4) et le deuxième contact étant configuré pour être connecté à une deuxième borne du transformateur de mesure (3, 4), de manière à ce que, quand l'unité enfichable (2) est connectée pour la première fois à l'ensemble de boîtier (1), l'élément de court-circuit (5) correspondant à chaque transformateur de tension (4) commute sur un état opérationnel dans lequel il ne court-circuite en aucun cas la paire correspondante de contacts (11), tandis que l'élément de court-circuit (5) correspondant à chaque transformateur de courant (3) commute sur un état opérationnel dans lequel il court-circuite la paire correspondante de contacts (11) quand l'unité enfichable (2) est détectée à partir de l'ensemble de boîtier (1), et en correspondance, quand l'unité enfichable (2) est connectée à l'ensemble de boîtier (1), supprime le court-circuitage de la paire de contacts (11), permettant au circuit de courant de circuler par l'intermédiaire du transformateur de courant (3).
  6. Ensemble selon la revendication 4, caractérisé en ce que chaque élément de court-circuit (5) comprend un corps substantiellement cylindrique (6), un embout de court-circuit (8) configuré pour court-circuiter la paire de contacts (11) correspondant audit élément de court-circuit (5) quand nécessaire, des moyens de ressort (7) configurés pour pousser l'embout de court-circuit (8) vers l'extérieur substantiellement dans la direction radiale du corps (6) et des moyens de rotation (9) configurés pour faire tourner l'élément de court-circuit (5) autour de l'axe de rotation du corps cylindrique (6).
  7. Ensemble selon la revendication 5, caractérisé en ce que le corps (6) de l'élément de court-circuit comprend une cavité (12) configurée pour recevoir des moyens de ressort (7) et l'embout de court-circuit (8) au moins en partie.
  8. Ensemble selon la revendication 3, caractérisé en ce que la structure de corps de bobine de chaque transformateur de mesure (3, 4) comprend un support de codage (13) qui, lorsqu'il est vu à partir d'une direction donnée, est façonné comme un rectangle dont un coin avant est biseauté de sorte que la partie biseautée s'étend au moins jusqu'à la ligne médiane imaginaire du support de codage (13).






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