EP2034495B1 - Transformer componentry, collet device and switching device - Google Patents

Description

The invention relates to a current transformer assembly according to the preamble of claim 1. It further relates to a receiving device with at least one such current transformer assembly and to a switching device with at least one such current transformer or at least one such current transformer assembly.

Generic current transformers are well known and are often designed as a toroidal transformer. These current transformers are often planetary arranged in generally known power converter assemblies (e.g., toroidal transformer assemblies) on each power lead passing vertically through the power converter and arranged in staggered relationship within the power converter assembly. As a rule, the current transformers or current transformer assemblies are arranged in a receiving device and / or associated with an electrical switching device.

For example, describes the JP 60 257111 a fastening device for a transformer to a power cable. The DE 1 133 817 describes a converter in which two flat conductors in the opposite direction pass through a transducer core and wherein the flat conductors have a reduced height in the region of their crossing point, so that an overall height at the crossing point corresponds to an original height of the flat conductor. The DE 100 02 800 describes a NH fuse strip, in which are in a U-shaped profiled strip Z-shaped access rails with an upper portion below a corresponding contact, a middle and a lower portion and provided in which current transformer with a slot-shaped passage opening for the implementation of the respective access rail are, so the current transformers are spaced apart from each other in the rail. A three-part conductor for current conductors in a NH fuse or NH fuse-load switching device in which the parts are screwed for connection, is in the EP 1 109 192 indicated, and the US 2006/0066425 describes a multi-phase relay arrangement in which by means of an electromagnetic "motor assembly" several switching contact assemblies, which are each associated with a transformer, are switchable.

However, a disadvantage of these known current transformers is a high space requirement. In the current transformer assemblies is due to the planetary, successively staggered structure justified, also high space requirement disadvantageous, which also has a negative effect on the recording device for the current transformer or the current transformer assembly and possibly the switching device. In addition, the current transformer assemblies due to the arrangement of the current transformer at least two different embodiments of conductors needed, and two different connection parts with which the respective power conductors are connected, which also increases the material and labor and thus a production, installation and a Maintenance or repair more expensive.

The invention is therefore based on the object of specifying an improved current transformer module. Furthermore, an improved recording device and an improved protection device should be specified.

This object is achieved with respect to the invention with the features of claim 1. For this purpose, in a current transformer with at least one inductance with a plane surface, with at least one conductor and with a perpendicular to the plane surface of the inductance arranged implementation for each one of the conductors, provided that at least a first, second and third section is included by the conductor. The first and second sections are at least partially arranged substantially parallel to the plane surface and the third section is at least partially guided through the implementation of the current transformer. Thus, since a width of the inductance parallel to the plane surface is greater than a depth of the inductance perpendicular to the plane surface, a reduced extension, e.g. Width, guaranteed by the current transformer.

For this purpose, it is also provided that in a current transformer assembly having at least two current transformers of the type mentioned above or described below, the feedthroughs of at least two of the at least two current transformers are arranged substantially parallel to each other. Furthermore, the bushings are arranged substantially on a common axis, in particular a common axis parallel to all normal axes of the inductances or a common axis which encloses an angle, in particular the same angle, with all normal axes. By means of this arrangement it is achieved that an extent of the current transformer assembly, that is, for example, a width, depth, height or a combination thereof, is reduced, since these are considered to be an overall extension resulting from the respective extensions of the current transformer.

With regard to the receiving device, the object is achieved according to the invention by the features of claim 10 and with respect to the switching device by the features of claim 12. For this purpose, in the recording device for at least one current transformer assembly of the type mentioned above or below provided that the current transformers along a common Axis are arranged. As a result, a reduced width, depth and / or height of the current transformer assembly is achieved.

With regard to the switching device, the object is achieved according to the invention by an assignment of at least one such current transformer or at least one such current transformer assembly for detecting currents to the switching device. Due to the smaller overall width (or overall depth, height or a combination thereof) can be used in a limited space such installation device available installation space or advantageously reduced the switching device.

Advantageous embodiments of the invention are the subject of the dependent claims on the respective independent claim. This used backlinks point to the further development of the subject matter of the main claim by the features of the respective subclaim; they should not be construed as a waiver of obtaining independent, objective protection for the feature combinations of the dependent claims. Furthermore, with a view to an interpretation of the claims in a closer specification of a feature in a subordinate claim, it is to be assumed that such a restriction does not exist in the respective preceding claims.

Preferably, it is provided for the current transformer that the conductor is a flat conductor. This results in an increased current carrying capacity at the same width perpendicular to the plane surface, a better deformability of the conductor and a reduction of the manufacturing effort and thus a cost reduction. Additionally or alternatively, it may be provided that the current conductor at least partially has a different cross-section, that is, e.g. at least partially a round conductor.

Particularly preferably, a surface of the first, second or first and second portions of the flat conductor is arranged substantially parallel to the plane surface. As a result, when a largest extent of a cross section of the flat conductor is arranged parallel to the plane surface, a more compact design of the current transformer is achieved.

Further preferably, the first, second and third portions of the conductor are arranged substantially Z-shaped. Alternatively, a substantially right angle or a substantially obtuse angle may be included by the first and third portions, and by the second and third portions. As a result, an improved adaptability to spatial conditions, e.g. a shape of the receiving device or e.g. a predetermined or predetermined width, guaranteed.

Preferably, the first and the second portion of the conductor are arranged on different sides of a plane perpendicular to the plane surface, which intersects the inductance substantially symmetrical. Thus, an improved applicability with at least one other current transformer, an improved adaptability to spatial conditions and a reduction of the work required for the production of such current transformers is given.

Further preferably, a contact device for producing an electrical contact of the power line comprises at least one conductor at least a portion of the second portion of the conductor, whereby a simplified construction of the current transformer and thus a cost reduction results.

For the current transformer assembly is preferably provided that it comprises at least two current transformers of the type described, wherein the bushings of at least two of the at least two current transformers are arranged substantially parallel to each other and substantially on a common axis, whereby a more compact design, a reduced width and / or a reduced height is achieved.

Preferably, the first and the second portion of the conductor are arranged substantially parallel. Thus, e.g. achieved a reduced width, resulting in a reduced space requirement. For example, the power converter assembly may include three current transformers arranged on a common axis, an extension of the power converter assembly being disposed along an axis perpendicular to at least one of the planar surfaces, e.g. a width of the current transformer assembly, 45 mm substantially does not exceed.

Particularly preferably, the respective current transformers of the current transformer assembly are substantially the same shape and the same orientation, whereby a cost in a production of the current transformer and the current transformer assembly or the receiving device is reduced. In addition to such an increase in efficiency also results in a cost reduction in the production, since, for example, one and the same production machine can be used for the production.

With regard to the receiving device, at least one integrated current path for phase change is preferably provided. As a result, a structure of a device for phase application is simplified and minimized space requirements of the receiving device and achieved a cost reduction, for example, no additional connection devices for connecting the receiving connection or the power converter assembly with a separate device for phase application are needed.

In a particularly preferred embodiment, the receiving device comprises at least one contact point for switching a, generally known, electrical load.

An embodiment of the invention will be explained in more detail with reference to the drawing. Corresponding objects or elements are provided in all figures with the same reference numerals.

The or each embodiment is not to be understood as limiting the invention. Rather, numerous modifications and variations are possible within the scope of the present disclosure, in particular those variants and combinations, for example, by combination or modification of individual features described in the general or specific description part as well as in the claims and / or the drawing Elements can be removed by a person skilled in the art in order to solve the problem and lead to a new object through combinable features.

FIG 1

eine schematische Darstellung einer Stromwandler-Baugruppe gemäß dem Stand der Technik,

FIG 2

eine schematische Darstellung einer Aufnahmevorrichtung mit Stromwandler-Baugruppe gemäß dem Stand der Technik,

FIG 3

eine schematische Aufsicht auf eine Ausführungsform einer erfindungsgemäßen Stromwandler-Baugruppe,

FIG 4

eine schematische, perspektivische Darstellung der Stromwandler-Baugruppe aus FIG 3 in zerlegtem Zustand,

FIG 5

eine schematische, perspektivische Darstellung einer alternativen Ausführungsform einer erfindungsgemäßen Stromwandler-Baugruppe,

FIG 6

eine weitere schematische, perspektivische Darstellung der in FIG 5 dargestellten Stromwandler-Baugruppe,

FIG 7

eine schematische, perspektivische Darstellung einer Ausführungsform einer erfindungsgemäßen Aufnahmevorrichtung mit einer integrierten Phasenwendung für einen Wendestarter, und

FIG 8

eine schematische, perspektivische Darstellung der Aufnahmevorrichtung aus FIG 7 in zerlegtem Zustand.

Show in it

FIG. 1

a schematic representation of a current transformer assembly according to the prior art,

FIG. 2

a schematic representation of a recording device with current transformer assembly according to the prior art,

FIG. 3

a schematic plan view of an embodiment of a current transformer assembly according to the invention,

FIG. 4

a schematic perspective view of the current transformer assembly from FIG. 3 in disassembled condition,

FIG. 5

a schematic, perspective view of an alternative embodiment of a current transformer assembly according to the invention,

FIG. 6

a further schematic, perspective view of in FIG. 5 illustrated current transformer assembly,

FIG. 7

a schematic perspective view of an embodiment of a recording device according to the invention with an integrated phase application for a reversing starter, and

FIG. 8

a schematic, perspective view of the recording device FIG. 7 in disassembled condition.

FIG. 1 shows a schematic representation of a current transformer assembly 10 according to the prior art, in which three current transformers 12a, 12b, 12c arranged planetary wheel. Two current transformers 12a, 12c are located in one plane. The third current transformer 12b is located substantially outside this plane.

Each current transformer 12a, 12b, 12c in each case comprises an inductance 14a, 14b, 14c with a feedthrough 16a, 16b, 16c arranged perpendicular to a plane surface of the inductance 14a, 14b, 14c for a respective current conductor 18a, 18b, 18c. In each case one of the current conductors 18a, 18b, 18c is guided vertically through the corresponding bushing 16a, 16b, 16c, and a contact device 20a, 20b, 20c contacts one of the current conductors 18a, 18b, 18c in each case.

FIG. 2 shows a schematic representation of a recording device 22 with current transformer assembly 10 (in FIG. 1 ) according to the prior art with the contact devices 20a, 20b, 20c of the current conductors 18a, 18b, 18c and one of the current transformers 12a, 12b, 12c (in FIG. 1 The receiving device 22 has due to the arrangement of in FIG. 1 shown current transformers 12a, 12b, 12c a large height, width and depth.

FIG. 3 shows a schematic plan view of an embodiment of a current transformer assembly 10 according to the invention with three current transformers 12a, 12b, 12c, with substantially the same shape and the same orientation, in a receiving device 22. The current transformers 12a, 12b, 12c are arranged such that the inductances 14a, 14b, 14c lie on a common axis running perpendicular to the plane surfaces. Each current transformer 12a, 12b, 12c comprises an inductance 14a, 14b, 14c with a plane perpendicular to which the leadthrough 16a, 16b, 16c for one of the current conductors 18a, 18b, 18c, which are formed as a flat conductor, is arranged. The current conductors 18a, 18b, 18c each comprise a first portion 24a, 24b, 24c and a second portion 26a, 26b, 26c, which are arranged parallel to the plane surface of the inductance 14a, 14b, 14c. Additionally or alternatively, the second portion 26a, 26b, 26c may comprise the contact device 20a, 20b, 20c, and further the contact devices 20a, 20b, 20c may also be of substantially the same shape and orientation. A third section 28a, 28b, 28c located between the first and second sections 24a-c, 26a-c is from a first side of the planar surface to a second side of the planar surface through the passage 16a, 16b, 16c of the current transformer 12a, 12b , 12c led.

FIG. 4 shows a schematic perspective view of the current transformer assembly 10 from FIG. 3 in disassembled condition, all for FIG. 3 having described elements. However, here is an arrangement of the third portion 28a-c which is in FIG. 3 due to the inductances 14a, 14b, 14c is partially not visible, clearly visible. The first, second and third sections 24a-c, 26a-c, 28a-c of the current conductors 18a, 18b, 18c are arranged in a substantially Z-shaped manner.

FIG. 5 shows a schematic, perspective view of an alternative embodiment of a current transformer assembly 10 according to the invention, which in its basic features of in FIG. 3 represented corresponds. In contrast to this, the three current transformers 12a, 12b, 12c of the current transformer assembly 10 are arranged such that the inductances 14a, 14b, 14c are arranged on a common axis are, which with the parallel plane surfaces an angle, here an angle different from 90 °, includes. In addition or alternatively, the connecting device 20a, 20b, 20c is mechanically and electrically conductively connected to the current conductor 18a, 18b, 18c by means of a recess 30a, 30b, 30c corresponding to a cross section of the current conductor 18a, 18b, 18c. Additionally or alternatively, a conductor contact 31a, 31b, 31c may be provided, with which the first portion 24a, 24b, 24c is electrically conductively connected and which may also be an integral part of the receiving device 22.

FIG. 6 shows a further schematic perspective view of the current transformer assembly 10 from FIG. 5 , In this case, a contact point 31d, 31e, 31f is integrated into the receiving device 22. By means of the recess 30a, 30b, 30c, the second portion 26a, 26b, 26c of the current conductor 18a, 18b, 18c is in electrical contact with the contact point 31d, 31e, 31f. In addition or as an alternative, the current conductor 18a, 18b, 18c can be firmly connected to the respective contact point 31d, 31e, 31f, eg by means of a soldered connection, screw connection or the like, or the contact point 31d, 31e, 31f can be encompassed by the current conductor 18a, 18b, 18c.

FIG. 7 shows a schematic, perspective view of an embodiment of a receiving device 22 according to the invention for a current transformer assembly 10 to a phase change, which substantially the in FIG. 3 represented current transformer assembly 10 corresponds. To phase use, for example for a reversing starter, the receiving device 22 is thereby formed for receiving in each case one, with one of the current conductors 18a, 18b, 18c corresponding first, second and third current path 32a, 32b, 32c. In a first contact region 34c, 34b, 34a assigned to the first section 24c, the current conductor 18c routed through the leadthrough 16c of the inductances 14a, 14b, 14c contacts a second contact region 36c, 36b, 36a of the respectively corresponding current path 32c, 32b, 32a. The current paths 32c, 32b, 32a include each further a third contact area.

FIG. 8 schematically shows the recording device FIG. 7 from another perspective and in disassembled state. A first part 22a of the receiving device 22 is designed to receive the inductors 14a, 14b, 14c and the current conductors 18a, 18b, 18c and to receive the current paths 32c, 32b, 32a corresponding to the current conductors 18a, 18b, 18c. By means of the first part 22a and a second part 22b of the receiving device 22, the third contact areas are accessible; for phase-shifting, the first current path 32a is passed around the second current path 32b and this in turn is led around the third current path 32c.

Thus, the invention can be briefly represented as follows:

Disclosed is a current transformer 12a, 12b, 12c with at least one inductance 14a, 14b, 14c with a plane surface, at least one current conductor 18a, 18b, 18c and with a perpendicular to the plane surface of the inductance 14a, 14b, 14c arranged bushing 16a, 16b, 16c for each one of the current conductors 18a, 18b, 18c, wherein of the current conductor 18a, 18b, 18c at least a first, second and third portion 24a, 24b, 24c, 26a, 26c, 26c, 28a, 28b, 28c is included, wherein the first and second portions 24a, 24b, 24c, 26a, 26b, 26c are at least partially disposed substantially parallel to the plane surface and wherein the third portion 28a, 28b, 28c at least partially through the passage 16a, 16b, 16c of the current transformer 12a, 12b, 12c is feasible, a current transformer assembly 10 with at least two such current transformers 12a, 12b, 12c, wherein the bushings 16a, 16b, 16c at least two of the at least two current transformers 12a, 12b, 12c substantially parallel to each other and in essence are arranged on a common axis, a receiving device 22 for at least one such current transformer assembly 10, wherein the current transformers 12a, 12b, 12c along a common axis and a switching device with at least one such current transformer 12a, 12b, 12c or at least one such current transformer assembly 10th

Claims (10)

1. Current transformer assembly (10) comprising at least two current transformers (12a, 12b, 12c), wherein at least two of the current transformers (12a, 12b, 12c) comprise at least one inductance (14a, 14b, 14c) with a plane surface, at least one electrical conductor (18a, 18b, 18c) and a leadthrough (16a, 16b, 16c), arranged perpendicular to the plane surface of the inductance (14a, 14b, 14c), for in each case one of the electrical conductors (18a, 18b, 18c), wherein at least one first, second and third section (24a, 24b, 24c, 26a, 26b, 26c, 28a, 28b, 28c) is surrounded by the electrical conductor (18a, 18b, 18c), wherein the first and second sections (24a, 24b, 24c, 26a, 26b, 26c) are arranged at least partially substantially parallel to the plane surface, wherein the third section (28a, 28b, 28c) can be passed at least partially through the leadthrough (16a, 16b, 16c) of the current transformer (12a, 12b, 12c), and wherein the leadthroughs (16a, 16b, 16c) of at least two of the at least two current transformers (12a, 12b, 12c) are arranged substantially parallel to one another and substantially on a common axis, characterized in that the first, second and third sections (24a, 24b, 24c, 26a, 26b, 26c, 28a, 28b, 28c) of the at least one electrical conductor (18a, 18b, 18c) are arranged substantially in the form of a Z.
2. Current transformer assembly according to Claim 1, wherein at least one of the electrical conductors (18a, 18b, 18c) is a flat conductor (18a, 18b, 18c).
3. Current transformer assembly according to Claim 2, wherein a surface of the first section (24a, 24b, 24c), the second section (26a, 26b, 26c) or the first and second sections (24a, 24b, 24c, 26a, 26b, 26c) of the at least one flat conductor (18a, 18b, 18c) is arranged substantially parallel to the plane surface.
4. Current transformer assembly according to one of the preceding claims, wherein the first section (24a, 24b, 24c) and the second section (26a, 26b, 26c) of the at least one flat conductor (18a, 18b, 18c) are arranged on different sides of a surface arranged perpendicular to the plane surface, which surface intersects the inductance (14a, 14b, 14c) substantially symmetrically.
5. Current transformer assembly according to one of the preceding claims, wherein at least one contact apparatus (20a, 20b, 20c) for producing an electrical contact between the at least one electrical conductor (18a, 18b, 18c) and at least one conductor surrounds at least part of the second section (26a, 26b, 26c) of the at least one electrical conductor (18a, 18b, 18c).
6. Current transformer assembly according to one of the preceding claims, wherein the first section (24a, 24b, 24c) and the second section (26a, 26b, 26c) are arranged substantially parallel to one another.
7. Current transformer assembly according to one of the preceding claims, wherein the respective current transformers (12a, 12b, 12c) have substantially the same shape and substantially the same orientation.
8. Accommodating apparatus comprising at least one current transformer assembly according to one of the preceding claims, comprising at least one integrated current path (32a, 32b, 32c) for phase changing.
9. Switching device comprising at least one current transformer assembly (10) according to one of Claims 1 to 7.
10. Accommodating apparatus according to Claim 8, comprising at least one integrated contact point (31d, 31e, 31f) for switching an electrical load.

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