KR20130047695A - Current transformer device - Google Patents

Abstract

The present invention relates to a current converter unit (1, 2, 3) having an essentially rotationally symmetrical current converter core (10, 20, 30) with a central axis (15, 25, 35) and said current converter center. It relates to a gas-insulated intermediate or high-voltage switching station (GIS) comprising holding means (50, 60, 70) for fastening in connection with nominal conductors (90, 100, 110). The holding means is such that the minimum reference distance 81 which can be reached by the provided outer diameters 12, 22, 32 of the current converter center is parallel, since the current converter center can be fastened in an eccentric position with respect to the nominal conductor. It is formed to be reduced due to the offset (a) of the central axis of the current transducer with respect to the longitudinal axis of the nominal conductor extending to.

Description

Current transformer device {CURRENT TRANSFORMER DEVICE}

Aspects of the present invention relate to the field of electrical current sensors, and in particular to current transducers for switchgear assemblies for high and medium voltages. Specifically, the aspects relate to an embodiment of a gas-insulated current converter unit.

Current transducers are generally used to measure the currents through the nominal conductor of a gas-encapsulated high-voltage or medium-voltage switchgear assembly. For example, the current transducers consist of a ferrite core on which a copper winding is wound. To be fitted, the ring shaped current transducer core is pushed over one end of the nominal conductor, as a result of which the conductor passes through the interior of the ring. If a load current is flowing through the conductor, a voltage is induced in the winding of the current transducer core, which voltage is tapped through the resistor and acts as a measure of the current flowing through the nominal conductor. The nominal conductor is the primary conductor used to transmit rated power during operation of the switchgear assembly.

In the case of a gas-insulated switchgear assembly in which nominal conductors are arranged in a metal-encapsulated housing, the current transducer core (s) may be arranged in gas encapsulation of the conductor, ie both inside and outside the housing. In the case of gas-encapsulated nominal conductors arranged next to each other and extending parallel to each other, each having a current converter core, the outer diameter of the current converter cores clearly exceeds the outer diameter of the encapsulation of the nominal conductors. Because of this, the minimum distance (hereinafter referred to as reference distance) between the nominal conductors encapsulated at given outer diameters of the current transducer cores and with the concentric arrangement of the current transducer cores with respect to the nominal conductors is ultimately the dimension of the current transducer. Determined by them. The dimensions of the current converter cores are determined in order by metrologically required cross section and manufacturing requirements. Therefore, the current converter cores substantially determine the minimum achievable distance between the nominal conductors. One-off designs of current converter cores, for example with a reduced outer diameter compared to standard designs, are usually very expensive and are therefore not economically of interest, for example disadvantageous to achieve inexpensive switch panels. Do.

Unfortunately, at present, conventional standard designs for current converter cores are as small as possible and can be achieved, for example, by moving adjacent nominal conductors and their encapsulation closer to each other, for example. It does not meet the general market requirements for gear assembly dimensions.

Therefore, it is an object of the present invention to attach current converter cores to nominal conductors arranged next to each other, where an arrangement of nominal conductors having a reduced actual distance relative to the reference distance with respect to each other is pre-determined and It is often proposed a possibility that can be achieved using standardized current converter cores.

This object is achieved by an intermediate- or high-voltage switchgear assembly as claimed in claim 1.

In a basic embodiment, the medium-voltage or high-voltage switchgear assembly has at least two current converter units. Each of these current converter units includes the following elements:

a) a nominal conductor extending in the direction of the longitudinal axis and having a nominal conductor diameter;

b) a current transducer core in the form of a ring and substantially rotationally symmetrical about its center-axis, wherein the current transducer core is inwardly radially inward and radially inward with respect to the center-axis of the current transducer core. Having a current converter core; And

c) holding means for fastening the current converter core in a position relative to the nominal conductor, with the result that the center-axis of the current converter core extends parallel to the longitudinal axis of the nominal conductor.

In this case, the longitudinal axes of the nominal conductors can be arranged at reference distances with respect to each other at given outer diameters of the current converter cores and with a concentric arrangement of the nominal conductors of the current converter cores. Reference distance will be understood below to mean the minimum achievable distance between the longitudinal axes of two adjacent nominal conductors. These reference distances are as follows:

a) if the current converter cores with their end faces are arranged in a common plane, when adjacent current converter cores radially abut one another on the outside of the side of the current converter cores forming an outer diameter, By the minimum distance between the longitudinal axes, or

b) if the current converter cores are offset (staggered) with respect to one another in the direction of their longitudinal axes, the current converter whose side of the first nominal conductor of the first electrical phase forms an outer diameter; When in contact with the current converter core on the second electrical side of the core, by the minimum distance between the longitudinal axes of the nominal conductors, or

c) if the current converter cores are offset (staggered) relative to each other in the direction of their longitudinal axes, the second side of the current converter core in which the side of the encapsulation of the nominal conductor on the first electrical form an outer diameter; When in contact with the electrical current converter core, it is supported by the minimum distance between the longitudinal axes of the nominal conductors.

In addition, the term “switchgear assembly” is hereafter used as part of a medium- or high-voltage switchgear assembly, for example a gas-insulated switchgear assembly module, which is used to measure the electrical current flowing through individual nominal conductors. It will be understood to mean.

Furthermore, the switchgear assembly is characterized in that at least one of the two current converter cores has the achievable actual distance between the longitudinal axes of the nominal conductors at the given outer diameters of the current converter cores of cases a) to c). It is characterized by the fact that it is possible to fasten eccentrically to its nominal conductor due to the holding means in such a way that it is less than the reference distance in the case.

This basic embodiment of a medium-voltage or high-voltage switchgear assembly is a single-phase-encapsulation of air-insulated switchgear assemblies, eg outdoor mounts, and gas-isolated switchgear assemblies (GIS). Since both integrated or multiphase-encapsulated embodiments can be realized accordingly, it enables mounting manufacturers and consumers to have the maximum possible design freedom for switchgear assemblies. In the case of a GIS, it is more particularly advantageous that both switchgear assemblies in which the current converter cores are arranged outside the actual gas space and also embodiments in which the current converter cores are arranged in the actual gas space can be realized accordingly.

In the following description of the invention the term "current converter core" should not be understood in the narrow sense of being limited to the iron core (as briefly mentioned in the introduction) of the current converter. The term "current converter core" is understood to mean the actual body or contour of the measuring device, which instead serves as a current sensor. As a result, therefore, the term "current converter core" is not limited to current converters consisting of a ferrite core with a copper winding wound thereon, so-called Rogowski, in which the copper coil comprises a toroidal cavity. It also includes coils. Therefore, Rogowski coils are also suitable for the reason that at least the measurement quality is not disturbed, since their center-axis is given an eccentric arrangement with respect to the longitudinal axis of the nominal conductor, but the reason is not limited thereto.

In the case of one embodiment of the switchgear assembly as a GIS, the nominal conductors of the current converter units of each phase are arranged in each case in a metal-encapsulated encapsulation in a gas-insulated manner. In this case, the encapsulation is arranged between the individual nominal conductors and the inner side of the current converter core associated with it.

Depending on the requirements and options, the holding means of the current converter units, for example in each case, comprise a holding means axis extending in the direction of the longitudinal axis of the nominal conductor, the inner diameter of which is substantially associated with the encapsulation. It is comprised as at least one ring shaped element corresponding to an outer diameter. If desired, the ring shaped element has a holding means axis and at least one fastening geometry, which is arranged on a circle which is arranged eccentrically with respect to the holding means axis of the element. The current converter core can be fastened on the fastening geometry of the holding means in such a way that it can be fastened concentrically to this circle on the holding means. Corresponding to the nature of the current converter core and fitting requirements therewith, the fastening geometry comprises at least one of the elements from the list consisting of a bore, a thread, a threaded sleeve and a stud.

If, for example, a multifunctional but nevertheless space-saving holding means is required, the ring shaped element may have a plurality of segments or may consist of a plurality of, for example chain-like elements. .

The holding means make it possible to achieve an offset of greater than about 5% of the nominal conductor diameter with respect to the longitudinal axis of the nominal conductor of the center-axis of the current converter. Given a correspondingly formed holding means and depending on the dimensions of the current transducer cores, offsets between 5% and 50% of the nominal conductor diameter can be achieved if they need to be nominal conductor diameters and encapsulations. .

If required, the switchgear assemblies can also be realized with current converter cores of three current converter units which are arranged next to each other in the plane and which are intended to be particularly compact in physical height within the switchgear assemblies. . In this case, when the longitudinal axes of the nominal conductors are arranged extending parallel to each other in the plane and in the metal-encapsulated encapsulation, each nominal conductor extends concentrically with respect to the individual nominal conductors in a gas-insulated manner. Good results can be achieved when arranged. Depending on the embodiment, the metal-encapsulated encapsulations are arranged at a certain distance along a straight line in this case.

For example, with current holding cores using the holding means, the maximum gap between the encapsulation and the inner side of the current converter core associated with the individual encapsulation is the distance of two outer nominal conductors away from two other nominal conductors. At least two adjacent nominal due to the fact that in each case it is arranged on encapsulations of two outer nominal conductors eccentrically with respect to the longitudinal axes of the nominal conductors in such a way as to be located on one side of the encapsulation Especially small actual distances between the conductors can be achieved.

Alternatively or additionally in combination with this, in the case of a switchgear assembly having three current converter units, at least two of the three current converter cores are provided when the current converter cores are viewed in the direction of the longitudinal axis of their nominal conductors. Due to the fact that they can be offset and aligned with respect to one another in the direction of the longitudinal axis of the nominal conductors in such a way as to overlap each other, the actual distance between two adjacent nominal conductors can be reduced.

It also includes embodiments of switchgear assemblies in which each nominal conductor is arranged in a metal-encapsulated encapsulation extending concentrically with respect to the individual nominal conductor in a gas-insulated manner, wherein the metal-encapsulated phosphorus Encapsulations are arranged at a constant distance along a straight line. In a more advanced embodiment of this, the current converter cores use holding means such that the maximum gap between the encapsulation and the inner surface of the current converter core associated with the individual encapsulation is two outer away from two other nominal conductors. In such a way as to be located on one side of the encapsulation of the nominal conductors, in each case it can be arranged on encapsulations of the two outer nominal conductors eccentrically with respect to the longitudinal axes of the nominal conductors. In the case of a circular-cylindrical current converter core and circular nominal conductors or encapsulations, the gap has a sickle-shaped cross section in the direction of the longitudinal axes of the nominal conductors, where the maximum gap is sickle-shaped. Located on the axis of symmetry of the cross section.

However, the invention is advantageous not only in switchgear assemblies in which the parallel-extending longitudinal axes of nominal conductors are located in a common plane, but also in so-called triangular arrangements. In a triangular arrangement, the longitudinal axes of the nominal conductors extend parallel to each other and pass through a passage plane that extends at right angles to the longitudinal axes of the nominal conductors at three points, where three The points form the vertices of the equilateral triangle.

In this triangular arrangement, each of the encapsulations of the inner side of the current transducer core, such that the maximum gap for the nominal conductor associated therewith or for the encapsulation associated therewith, is located within one hemisphere of the encapsulation. In the case very compact switchgear assemblies can be realized when the current converter cores are arranged eccentrically with respect to the nominal conductors, which hemispheres are spaced apart from two other nominal conductors. In the case of circular-cylindrical current converter cores and circular nominal conductors, the gap has a sickle-shaped cross section in the direction of the longitudinal axes of the nominal conductors, where the maximum value is located on the axis of symmetry of the sickle-shaped cross section.

In another generic type of gas-insulated switchgear assemblies, the nominal conductors of the different electrical phases are included in the common gas space by an insulating gas relative to each other and to a common housing that forms an encapsulation and delimits the gas space. . One embodiment of such a mounting comprising the latter includes three arranged nominal conductors extending parallel to each other and arranged in a common gas-encapsulated housing and three current converter units arranged in the housing. In this case, at least one of the three current converter units is a current converter unit according to the basic embodiment mentioned in the introduction.

In this case, it is also possible for the holding means to achieve an offset of the center-axis of the current transducer with respect to the longitudinal axis of the nominal conductor which is greater than 5% of the nominal conductor diameter. Given a correspondingly designed holding means and depending on the dimensions of the current transducer cores and the nominal conductor diameters, an offset can be achieved which is between 5% and 50% of the nominal conductor diameter. This does not exclude the possibility that the medium-voltage or high-voltage switchgear assembly includes current converter units with current converter cores arranged next to each other in a plane.

Even in the case of multiphase-encapsulated switchgear assemblies in which a plurality of nominal conductors of different electrical potentials are arranged in a common housing, the present invention can be used to reduce the reference distance between two adjacent nominal conductors as follows. The present invention has an advantage. This, for example, passes through a passing plane in which the longitudinal axes of nominal conductors extend parallel to each other and at right angles to the longitudinal axes of the nominal conductors at three points, wherein the three points in the passing plane Thanks to the fact that they form the vertices of an equilateral triangle, this can be achieved. In this case, the current converter cores are nominally in such a way that the maximum gap between the encapsulation of the nominal conductor and the inner side of the current converter core associated therewith is located in one hemisphere of the encapsulation away from the two other nominal conductors. When arranged eccentrically in each case with respect to the longitudinal axes of the conductors, a particularly small actual distance between two adjacent nominal conductors can be achieved. Further reduction in the actual distance between the longitudinal axes of the at least two adjacent nominal conductors can be achieved by offsetting (staggering) the current converter cores into each other by the relative position of the current converter cores in the direction of the longitudinal axis. .

Although the term "given outer diameter" of current converter cores has been understood to mean the same outer diameters in this disclosure for the sake of improved clarity, the technical teachings of this document also convey to different given outer diameters of current converter cores. Can be. In such a case, the actual distance between the longitudinal axes of adjacent nominal conductors can be achieved when a current converter with a larger outer diameter is arranged eccentrically with respect to the nominal conductor associated with it.

The invention will now be described with reference to exemplary embodiments which are illustrated in the drawings and which provide other advantages and modifications. In the figures:
1 shows a side view / vertical section view of a switchgear assembly having three current converter units, according to the first embodiment;
2 shows a cross-sectional view of the exemplary embodiment shown in FIG. 1;
3 shows a plan view of the holding means in the direction of the holding means axis;
3a shows a side view of the holding means shown in FIG. 3;
4 shows a side view / vertical cross section view of a switchgear assembly having three current converter modules, according to a second embodiment;
5 shows a cross-sectional view of a switchgear assembly having three current converter modules, according to the third embodiment;
6A shows a cross-sectional view of an initial position for other embodiments of switchgear assemblies;
6B shows a cross-sectional view of a fourth embodiment of switchgear assemblies;
6C shows a cross-sectional view of a fifth embodiment of switchgear assemblies; And
7 shows an example of the dependence of the offset a and the radius r of the current transducers in cross section.

In the embodiments described below, individual aspects and features can be combined in a form that is modular with the features of other embodiments. Thanks to this combination, other embodiments may be created in order that may similarly be considered to belong to the present disclosure. The same features that occur in the different figures are not necessarily provided as corresponding reference symbols in each figure for reasons of clarity.

6A and 6B, FIG. 1 is a gas-insulated high-voltage or medium-voltage switchgear assembly that is mentioned or illustrated herein and has three current converter units 1, 2, 3. Exemplary embodiments of the present invention that can be combined with other exemplary embodiments related to. In the example, the three current converter cores 10, 20, 30 of the three current converter units 1, 2, 3 are each in each case by one holding means 50, 60, 70. In the case of attachment or fastening to the encapsulations 140, 150, 160 of one nominal conductor 90, 100, 110. In this case, the metal-encapsulated housings or encapsulations 140, 150, 160 are respectively arranged concentrically with respect to the individual nominal conductors 90, 100, 100 and each of the encapsulation diameters 141, 151. , 161). This is also evident from the longitudinal cross-sectional view in FIG. 1, among others, and the encapsulation diameters 141, 151, 161 are shown in FIG. 4 for reasons of clarity. Therefore, the holding means 50, 60, 70 are used to fasten the current converter core in a position relative to the nominal conductor 90, 100, 110 and as a result of the current converter core 10, 20, 30 The center-axis extends parallel to the longitudinal axis of the nominal conductors 90, 100, 110. Each current converter core defines a central axis 15, 25, 35, thanks to its circular-cylindrical shape, and is formed substantially rotationally symmetrically and in the form of a ring, wherein the current converter core 10, 20, 30 define inner surfaces 11, 21, 31 and outer diameters 12, 22, 32 that face radially inward (ie, inwardly inward) with respect to center-axis 15, 25, 35. Have Each nominal conductor 90, 100, 110 for transmitting medium or high voltage defines its longitudinal axes 92, 102, 112, thanks to its cylindrical shape, and nominal conductor diameters 91, 101, 111. Has Each holding means 50, 60, 70 has a dedicated holding means axis 51, 61, 71. In this case, as a result, a parallel-eccentric arrangement of the current converter cores with respect to the nominal conductors 90, 100, 110 or their encapsulations 140, 150, 160 is obtained. In a manner, the holding means are designed and fitted. Three physically identical current converter cores 10, 20, 30 are arranged in plane 170 or abut this plane 170 at the end. In other words, thanks to the eccentric arrangement, the offset of the longitudinal axes of the nominal conductors 90, 100, 100 results in a theoretical reference distance 80 at the given outer diameters 12, 22, 32 of the current converter cores. May result in actual distances 82 between adjacent nominal conductors 90, 100, 110 smaller than where they contact each other radially from the outside on the side of the outer surface at their diameters (even from this point of view). See top example of 7).

FIG. 2 shows a cross-sectional view of an exemplary embodiment according to the embodiment of the switchgear assembly shown in FIG. 1. In the figures, the outer diameters 12, 22, 32 of the current converter cores 10, 20, 30, together with their center-axes 15, 25, 35, nominal conductors 90 for illustrative purposes 90. , 100, 110) and their encapsulations are illustrated in an enlarged form as compared to the sizes. Dimension a defines the offset between the longitudinal axis of the nominal conductor and the center-axis of the current converter core in the case of all three current converter units 1, 2, 3. The larger the value for a, the more the nominal conductors approach closer to each other in design terms if the dimensions of the encapsulations 140, 150, 160 and the dimensions of the current converter cores are the same in size, respectively. Can be. In the case of an encapsulation diameter of 250 mm (this corresponds to the outer diameter of the current transducer core of about 300 mm), the eccentricity a is typically from 5 mm to 40 mm, for example 12.5 mm, 16 mm Or 22 mm. In this case, the axes of the current converter cores and the longitudinal axes of nominal conductors or encapsulations are usually parallel. The design of the eccentricity a depends on the dimensions of the mounting example and on the clearance dimension for the joining-together of the nominal conductors in terms of the nominal conductors being pushed against each other, which is eccentric It is intended to be achieved by means of an arrangement.

Starting with three current converter cores 10, 20, 30 having an outer diameter 2r and which are conventionally fitted centrally around their respective nominal conductors, the current converter cores of individually adjacent nominal conductors at their outer diameters. Given the eccentric fit of the central core with the eccentricity a (in the normal direction on the common plane of the nominal conductors), the gains are given as follows: :

If a and r are defined using the same unit, g is the absolute value for the length in which in each case the two outer current converter cores can be moved or fitted inward closer. A schematic illustration as a function of a and r of the gain g between two adjacent current converter cores 10, 20 is illustrated using the example of FIG. 7. In this figure, the top view shows two transducers in a conventional initial state, and the center figure shows two transducers after the eccentric fitting of the left core by downward movement (intermediate state illustrated for illustrative purposes only). And the lowest figure shows two cores where the two cores have been fitted closer to each other by a gain g enabled by offset a. In the case of this eccentric fitting of only the middle of the three current converter cores, the gain g is relatively small. In the case of the outer diameter of the current transducer twice as large as a radius of 300 mm (hereinafter also referred to as transducer outer diameter), with an eccentricity of 20 mm according to Equation 1 above, the outer cores will be fitted closer to the center core. As a result a gain g of 2.7 mm is obtained. However, further gains are consequently obtained as a result of the eccentric fitting of the two outer current converter cores. In this case, given the corresponding fitting, the eccentricity is completely converted to gain, i.e. 20 mm of eccentric fitting of the outer core alone brings the outer current converter core closer to the central current converter core by 20 mm. Allow to move In each case, the 2.7 mm mentioned is added here.

Therefore, in the first exemplary embodiment, only two outer current converter cores are fitted eccentrically in order to save space. If it is desired to further optimize this, in other exemplary embodiments even smaller gains can be used by additional eccentric fitting of the central current converter core because of this measure.

As can be seen from FIG. 2, the maximum distance between the encapsulation (140, 160) of the nominal conductor and the inside of the current transducer core (10, 30) is typically the distance of encapsulation remote from two other nominal conductors. In order to achieve maximum gain in such a way as to be present in the hemisphere, the current converter cores in each case eccentrically hold on the encapsulations 140, 160 of the two outer nominal conductors 90, 110. It is arranged by (50, 70). Preferably, these maximum distances are in this case located on a substantially common straight line, where the maximum gain is achieved.

The method or proposed means according to the invention can be applied to current converter cores of all sizes, for example after the corresponding matching of the size of the holding means 50, 60, 70.

Current converter cores 10, 20, 30 are fastened to encapsulations 140, 150, 160 in one exemplary embodiment using holding means 50, 60, 70, the holding means being a ring. Shape elements. Such an element in the form of a disc is schematically illustrated in FIG. 3. Typically, the disk has two or more segments 120, 130 in the form of segments of a circular ring. Four fastening geometries 80 in the form of through-bore are used to fasten the current converter core using screw bolts that can be passed through the segments 120, 130. The fastening geometries 80 are arranged on the circle 83, which is arranged offset by the eccentricity a with respect to the geometric center point of the ring-shaped disc in the form of the holding means axis 51. Segments 120 and 130 are typically made of, for example, polymer, or other nonmagnetic materials such as aluminum, alloys thereof or nonmagnetic steels. In another exemplary embodiment, two holding means 50, 60, 70 are provided per current converter core, with one holding means on each side (with respect to the direction of the nominal conductor).

For fitting, segments 120, 130 of the disc are positioned on the encapsulation, where the inner diameter of the disc ring or partial segments 120, 130 is typically approximately encapsulated 140, 150, 160. Corresponds to the outer diameter of. The segments can then be fastened to each other or to encapsulation using measures pertaining to the prior art. The holding elements 50, 60, 70 fastened in this manner serve as fastening elements for the current converter core, where for example screws can be passed through the bores 80 and the It can fit tightly in the threads. In this way, a stable fitting position on the nominal conductor of the current transducer or its encapsulation can be achieved, which is centered about a length a. In other exemplary embodiments, the current transducers are fastened or fastened to the encapsulation through other means. Corresponding means and methods are within the standard knowledge of those skilled in the art.

FIG. 3A shows a side view of the ring-shaped or disc-shaped holding element 50, 60, 70 shown in FIG. 3.

In another exemplary embodiment of FIG. 4, the current converter cores 10, 20, 30 are along the longitudinal axis of their respective nominal conductors 90, 100, 110, at least by the size of their length in the direction of the nominal conductors. It is additionally arranged offset relative to each other. In this manner, except that, given the same dimensioning as that in the preceding exemplary embodiments, the overlap of the outer surfaces of the current converter cores as illustrated in the figure of FIG. As seen in the direction of the profile, smaller distances between nominal conductors can be achieved.

5 shows another embodiment. In this case, three nominal conductors 90, 100, 110 arranged parallel to each other are arranged in a common gas-encapsulated housing 200. Each nominal conductor is sealed by current converter cores 10, 20, 30 radially in longitudinal section. In a manner similar to that of the preceding exemplary embodiments, due to the eccentric arrangement of the current converter cores around the conductors, except that given the same dimensions of the current converter cores, relatively small between nominal conductors Distances are possible. In addition, this exemplary embodiment can be combined with the example shown in FIG. 4. Since all three current transducers in this example are located in a field representing typically different phases of the three conductors, additional measures must be taken in this case to ensure reliable operation and measurement. For example, these include attaching the plates between the nominal conductors and the individual current converter cores, where the plates are at the potential of the common housing 200.

The current converter cores have a maximum gap between the encapsulation 140, 160 of the nominal conductor and the inner side 11, 21, 31 of the current converter core 10, 30 associated therewith far from two other nominal conductors. In such a way as to be located in one hemisphere of the encapsulation, in each case it is arranged eccentrically with respect to the longitudinal axes of the nominal conductors 90, 100, 110.

6a shows the comparison between a conventional current converter arrangement (top) and an arrangement according to the invention for a three-phase switchgear assembly with three current converter units, since the current converter cores have the same design. As a result, due to the eccentric arrangement of the current converter cores for nominal conductors or for encapsulations at given outer diameters 12, 22, 32 of the current converter cores, the actual distance 82 is the reference distance. Since smaller than (81) the nominal conductors can be arranged closer to each other (see FIG. 6B). Three nominal conductors 90, 100, 110 whose encapsulations 140, 150, 160 extend concentrically around the nominal conductors are on a common straight line 175 at a constant distance 81. Are arranged. The straight line 175 mathematically extends normally in the longitudinal axes of the nominal conductors 90, 100, 110.

As an alternative to this, the eccentric arrangement of the current converter cores for nominal conductors or for encapsulations is given, given the same actual distance between two separate adjacent nominal conductors corresponding to the reference distance 81. It enables the use of current converter cores 10, 20, 30 with a larger current converter core diameter, ie the outer diameter of the current converter cores as conceptually shown in 6c. This suggests using the proposed means how the dimensions of the mounting can be reduced when the size of the current converter cores are maintained or whether larger current converter cores can be used within the same switchgear assembly (reduction of encapsulation). Illustrated with exaggerated relations of the ratio of the eccentricity a to the given diameter and other dimensions).

1, 2, 3 current transducer unit
10, 20, 30 transducer core
11, 21, 31 Inner side of current transducer core
12, 22, 32 outer diameter of current transducer core
Central axis of the 15, 25, 35 current transducer core
50, 60, 70 holding means
51, 61, 71 holding means axis
80 Fastening geometry of the holding means
81 reference distance
82 actual distance
83 Yen
84 circle center point
90, 100, 110 nominal conductors
91, 101, 111 nominal conductor diameter
92, 102, 112 longitudinal axis of nominal conductor
Segments of 120, 130 holding means
140, 150, 160 encapsulation
141, 151, 161 encapsulation diameters
170 flat
175 straight
200 housing
a center-axis / vertical axis offset
g gain

Claims (21)

A medium-voltage or high-voltage switchgear assembly having at least two current converter units (1, 2, 3),
Each current converter unit 1, 2, 3 is:
a) nominal conductors 90, 100, 110 extending in the direction of the longitudinal axis 92, 102, 112 and having a nominal conductor diameter 91, 101, 111;
b) a current converter core 10, 20, 30 in the form of a ring about its central axis 15, 25, 35, radially about the central axis 15, 25, 35 of the current converter core. The current converter core (10, 20, 30) having an inner surface (11, 21, 31) and an outer diameter (12, 22, 32) facing inward; And
c) holding means (50, 60, 70) for fastening said current converter cores (10, 20, 30) to positions relative to said nominal conductors (90, 100, 110), resulting in said current converter core ( With the holding means 50, 60, 70, the center-axis of 10, 20, 30 extending parallel to the longitudinal axis of the nominal conductor 90, 100, 110,
The nominal conductors 90, 100, 110 with a concentric arrangement of the current converter cores 10, 20, 30 with respect to the nominal conductors 90, 100, 110 at given outer diameters of the current converter cores. The longitudinal axes 92, 102, 112 of may be arranged at a reference distance 81 with respect to each other,
At least one of the two current converter cores 10, 20, 30 is the longitudinal of the nominal conductors 90, 100, 110 at the given outer diameters of the current converter cores 10, 20, 30. Using the holding means 50, 60, 70 is eccentric with respect to its nominal conductors 90, 100, 110 in such a way that the attainable actual distance 82 between the axes is less than the reference distance 81. Medium-voltage or high-voltage switchgear assembly, characterized in that the eccentrically fastenable. The method of claim 1,
The nominal conductors 90, 100, 110 of the current converter units 10, 20, 30 are in each case arranged in a gas-insulated manner in the metal-encapsulated encapsulation 140, 150, 160,
The encapsulation (140, 150, 160) is in each case an individual nominal conductor (90, 100, 110) and the inner side (11, 21, 31) of the current converter core (10, 20, 30) associated therewith. Medium-voltage or high-voltage switchgear assembly, characterized in that arranged between. The method of claim 2,
The holding means 50, 60, 70 of the current converter units in each case have at least a holding means axis 51, 61, 71 extending in the direction of the longitudinal axis of the nominal conductor 90, 100, 110. One ring shaped element 120, 130,
The inner diameter of the ring-shaped elements 120, 130 substantially corresponds to the outer diameters 141, 151, 161 of the encapsulations 140, 150, 160 associated therewith. -Voltage switchgear assembly. The method of claim 3, wherein
The ring shaped elements 120, 130 have at least one fastening geometry 80, the fastening geometry 80 being eccentric with respect to the holding means axis 51, 61, 71 of the element. The current transducer core (in such a way as to be arranged on a circularly arranged circle 83 so that the current transducer core 10, 20, 30 can be arranged concentrically with respect to the circle 83). 10, 20, 30, medium- or high-voltage switchgear assembly, characterized in that the fastening geometry 80 can be fastened. The method of claim 4, wherein
The fastening geometry 80 comprises at least one of the elements from the list consisting of a bore, a thread, a threaded sleeve and a stud. Switchgear assembly. 6. The method according to any one of claims 3 to 5,
The ring-shaped element of the holding means has a plurality of segments (120, 130). 7. The method according to any one of claims 1 to 6,
The offset (a) of the center-axis (15, 25, 35) of the current transducer relative to the longitudinal axis (92, 102, 112) of the nominal conductor is 5 of the nominal conductor diameter (91, 101, 111). Medium-voltage or high-voltage switchgear assembly, characterized in that greater than%. The method according to any one of claims 1 to 7,
In particular the offset (a) is between 5% and 50% of the nominal conductor diameter (91, 101, 111). The method according to any one of claims 1 to 8,
Three current converter units 1, 2, 3,
Medium- or high-voltage, characterized in that the current converter cores 10, 20, 30 of the three current converter units 1, 2, 3 are arranged next to each other in the plane 170. Switchgear assembly. The method of claim 9,
The longitudinal axes of the nominal conductors 90, 100, 110 extend in a plane and are arranged parallel to each other,
Each nominal conductor 90, 100, 110 is in a gas-insulated manner within the metal-encapsulated encapsulation 140, 150, 160 extending concentrically with respect to the individual nominal conductor 90, 100, 110. Arranged,
The metal-encapsulated encapsulations (140, 150, 160) are arranged at a constant distance along a straight line (175). 11. The method of claim 10,
The current converter cores are formed by the holding means 50, 70 in the interior of the current converter core 10, 30 associated with the encapsulation 140, 160 and an individual encapsulation 140, 160. In such a case that the maximum gap between the sides 11, 21, 31 is located on one side of the encapsulation of the two outer nominal conductors 90, 110 away from the two other nominal conductors. A medium-voltage characterized in that it is arranged on the encapsulations 140, 160 of two outer nominal conductors 90, 110 eccentrically with respect to the longitudinal axes of the nominal conductors 90, 100, 110. Or high-voltage switchgear assembly. The method according to any one of claims 1 to 8,
Three current converter units 1, 2, 3,
At least two of the three current converter cores 10, 20, 30 indicate that the current converter cores 10, 20, 30 are in the direction of the longitudinal axis of their nominal conductors 90, 100, 110. The nominal in such a way that when viewed overlapping each other and the actual distance between the longitudinal axes of the nominal conductors 90, 100, 110 can be further reduced at given outer diameters of the current converter cores 10, 20, 30. A medium- or high-voltage switchgear assembly, characterized in that it can be arranged offset relative to each other in the direction of the longitudinal axis (92, 102, 112) of the conductors (90, 100, 110). 13. The method of claim 12,
Each nominal conductor 90, 100, 110 is gas-insulated within a metal-encapsulated encapsulation 140, 150, 160 extending concentrically with respect to the individual nominal conductors 90, 100, 110. Arranged in a fashion,
The metal-encapsulated encapsulations (140, 150, 160) are arranged at a constant distance along a straight line (175). The method of claim 13,
The current converter cores are connected by the holding means 50, 70 to the inner side of the current converter core 10, 30 associated with the encapsulation 140, 160 and the individual encapsulation 140, 160. In such a way that the maximum gap between (11, 21, 31) is located on one side of the encapsulation of the two outer nominal conductors 90, 110, away from the two other nominal conductors. Intermediate-characterized on the encapsulations 140, 160 of two outer nominal conductors 90, 110 eccentrically with respect to the longitudinal axes of the nominal conductors 90, 100, 110. Voltage or high-voltage switchgear assembly. The method according to any one of claims 1 to 9 and 12,
The longitudinal axes of the nominal conductors 90, 100, 110 extend parallel to each other and at right angles to the longitudinal axes of the nominal conductors 90, 100, 110 at three points. Passing through a passage plane,
Three points in the passage plane form vertices of an equilateral triangle. The method of claim 15,
The current transducer cores are configured for the encapsulation of the encapsulation 140, 160 of the inner side 11, 21, 31 of the current transducer core 10, 30 to or about the nominal conductor associated therewith. Arranged eccentrically with respect to the nominal conductors 90, 100, 110 in each case in such a way that the maximum gap for is located in one hemisphere of the encapsulation,
Said hemisphere is distant from two other nominal conductors. The method of claim 1,
Three arranged nominal conductors 90, 100, 110 extending parallel to one another and arranged in a common gas-insulated housing 200 and
Three current converter units 10, 20, 30 arranged in the housing,
Medium-voltage or high-voltage switchgear assembly, characterized in that the three current converter units (10, 20, 30) are at least one current converter units according to claim 1. The method of claim 17,
The offset (a) of the center-axis (15, 25, 35) of the current transducer relative to the longitudinal axis (92, 102, 112) of the nominal conductor is 5 of the nominal conductor diameter (91, 101, 111). Medium-voltage or high-voltage switchgear assembly, characterized in that greater than%. The method according to claim 17 or 18,
In particular the offset (a) is between 5% and 50% of the nominal conductor diameter (91, 101, 111). 20. The method according to any one of claims 17 to 19,
Three current converter units 1, 2, 3,
The medium-voltage or high-characteristics of the current converter cores 10, 20, 30 of the three current converter units 1, 2, 3 are arranged next to each other in the plane 170. Voltage switchgear assembly. 20. The method according to any one of claims 17 to 19,
Three current converter units 1, 2, 3,
At least two of the three current converter cores 10, 20, 30 indicate that the current converter cores 10, 20, 30 are in the direction of the longitudinal axis of their nominal conductors 90, 100, 110. Said nominal conductors in such a way that they can overlap each other and the actual distance between the longitudinal axes of the nominal conductors 90, 100, 110 can be further reduced at given outer diameters of the current converter cores 10, 20, 30. Medium-voltage or high-voltage switchgear assembly, characterized in that they can be arranged offset relative to each other in the direction of the longitudinal axis (92, 102, 112) of the (90, 100, 110).

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