Touch protection arrangement for a busbar system with magnetically shielded connection adapter

Abstract

The invention relates to a touch protection arrangement (1) for a busbar system, comprising a touch protection housing (2) made of electrically insulating material, wherein the touch protection housing (2) has several receptacles (3) for busbars (4) and a cover (5) covering the receptacles (3) for mounting connection adapters, wherein the cover (5) has at least one series of through-holes (6) for each receptacle, which open into the respective receptacle (3), and wherein the arrangement comprises at least one multi-pole connection adapter (20) which is configured to reach through at least one of the through-holes (6) with at least two retaining and / or contact feet (21), characterized in that the at least one single- or multi-pole connection adapter (20) has a magnetic shield (7) at least between two adjacent retaining and / or contact feet (21).

Description

[0001] The invention relates to a touch protection arrangement for a busbar system, comprising a touch protection housing made of electrically insulating material. The touch protection housing has several receptacles for busbars and a cover over the receptacles for mounting connection adapters. The cover has at least one series of through-holes for each receptacle, opening into the respective receptacle. The arrangement includes at least one multi-pole connection adapter configured to extend through at least one of the through-holes with at least two retaining and / or contact feet. Such a touch protection arrangement is known from DE 10 2016 107 565 A1. Similar touch protection arrangements are also described in the subsequently published DE 10 2024 110 871 B3, DE 10 2016 104 267 B4, and EP 3 766 146 B1.

[0002] Such arrangements are used in switchgear and control system construction. For electrical switchgear and control systems, monitoring the power consumption of the electrical switchgear is desirable, especially in light of increasing efforts to save energy. A measuring adapter designed for field-based current measurement is described in WO 2017 / 148 826 A1. To suppress interference fields, the measuring adapter has magnetic shielding and is therefore quite complex in design and occupies a large amount of space on the protective cover, which is then unavailable for mounting components of an electrical switchgear and control system.

[0003] EP 3 772 796 B1 describes a busbar holder for fixing busbars in a low-voltage distribution board. It describes a current measuring device that detects the magnetic field generated by the busbars. The current measuring device is designed as a current transformer with a magnetic core and a transformer coil wound around it, the ends of which are electrically connected to the measuring device. The busbar holder is designed in two parts: a base part for mounting the busbar holder system in the control cabinet, with a receptacle for the busbar, and a cover part that can be attached to the base part. The magnetic core is also designed in two parts: a lower part and an upper part, which are connected to each other when mounted.The lower part is wound with the converter coil and is received and held in the base part of the busbar holder, while the upper part is received and held in the cover part of the busbar holder.

[0004] EP 3 187 886 B1 relates to a magnetically unshielded measuring adapter for a busbar system with several parallel busbars for supplying power to consumer units or loads via a switching device. The disclosed measuring module can also perform field measurements to determine the current. In one embodiment, the currents of the current phases are measured using Rogowski coils contained in the measuring module, or using shunts, or using Hall sensors, or using current transformers.

[0005] JP 6 256 838 B2 describes a control cabinet with a busbar system integrated into the control cabinet, which provides shielding on the busbars to improve field-based current measurement.

[0006] WO 2021 / 013 318 A1 describes a measuring adapter for contact current measurement.

[0007] EP 2 982 994 B1 describes a sensor and a method for measuring current in busbars, in which the correction of the influence of the interference of the magnetic fields of several energized busbars is provided.

[0008] Thus, arrangements are known from the prior art which are suitable for measuring the current of individual rails of a busbar system consisting of several busbars, but require rather elaborate measures for shielding against interference fields.

[0009] It is therefore the object of the invention to further develop a touch protection arrangement of the type described above in such a way that it is suitable for the reliable current measurement of the busbars included in the touch protection housing.

[0010] This problem is solved by a contact protection arrangement with the features of claim 1. Advantageous embodiments are the subject of the dependent claims.

[0011] Accordingly, it is provided that the at least one single- or multi-pole connection adapter has magnetic shielding at least between two adjacent retaining and / or contact feet. The magnetic shielding can be arranged between adjacent receptacles of the touch-protection housing. For example, the magnetic shielding can be arranged between those adjacent receptacles with which the adjacent retaining and / or contact feet engage when the connection adapter is mounted on the cover. In this case, the connection adapter can, for example, engage a busbar held in each of the two adjacent receptacles with its retaining and / or contact feet. The magnetic shielding can be partially, but not completely, arranged within a housing of the connection adapter from which the retaining and / or contact feet protrude.The magnetic shielding can be located partially or completely outside the housing of the connector adapter. The magnetic shielding can be located on the underside of the connector adapter housing from which the retaining and / or contact feet protrude. The magnetic shielding can protrude from and / or project from the underside. The magnetic shielding can extend, at least in sections, parallel to the retaining and / or contact feet.

[0012] The magnetic shield can extend through at least one of the openings. The opening through which the magnetic shield extends can be the same opening through which one of the mounting and / or contact feet extends when the connection adapter is mounted on the cover. Alternatively, the magnetic shield and the mounting and / or contact feet can extend through different openings in the cover. The magnetic shield can be an integral part of the mounting and / or contact feet, i.e., permanently or detachably connected to them. The magnetic shield can also be designed as a separate component independent of the mounting and / or contact feet, for example, positioned in front of or alongside them.Particularly preferably, the magnetic shielding is arranged outside the housing of the connector adapter, on a side along which the retaining and / or contact feet extend. The magnetic shielding can extend in the same direction as the retaining and / or contact feet, in particular parallel to them.

[0013] The magnetic shield can be made of or consist of a ferromagnetic material. The magnetic shield can be in the form of plates or strips. The magnetic shield can be at least partially integrated into the housing of the connector adapter. The magnetic shield can be at least partially located outside the housing of the connector adapter. The magnetic shield can be at least partially located within a housing of the connector adapter that allows the connector adapter to be mounted on the cover.

[0014] The magnetic shielding can extend, at least partially, through at least one of the openings when the connection adapter is mounted on the cover. The shielding can include or consist of at least one strip of ferromagnetic material. For example, when the connection adapter is mounted on the touch protection housing, the strip can be inserted into the housing through at least one of the openings. It can be dimensioned to fit through the openings through which the retaining and / or contact feet can also be inserted into the touch protection housing. For example, the strip can be inserted up to a lower part of the touch protection housing that has the receptacles. The strip can be positioned between two receptacles, particularly between two adjacent receptacles.The strip-shaped shield can have a thickness that is essentially the same as, or slightly thicker than, that of a printed circuit board on which at least one magnetic field sensor can be arranged, for example, if the printed circuit board with the at least one magnetic field sensor is configured for field-based current measurement of an electric current flowing through a busbar inserted into one of the receptacles. In one embodiment, the dimensions and / or positioning of the shield in relation to the at least one magnetic field sensor can be determined such that at least the evaluation plane of the detection area of ​​the at least one magnetic field sensor is shielded by the shield from magnetic fields generated by adjacent busbars.

[0015] The magnetic shielding can extend at least partially in alignment with at least one of the at least two retaining and / or contact feet. The magnetic shielding can also extend at least partially through the same openings through which one of the retaining and / or contact feet extends when the connection adapter is mounted on the cover.

[0016] The connection adapter can have at least one magnetic field sensor, preferably a sensor arrangement with several magnetic field sensors, of which at least two magnetic field sensors are particularly preferably arranged opposite each other with respect to at least one of the busbar receptacles. This allows the at least two magnetic field sensors to be arranged on opposite sides of a busbar inserted into the receptacle, either directly adjacent to the busbar or at a distance. This arrangement is particularly suitable for differential measurement and thus for a precise field-based determination of the electric current. The magnetic field sensor can, for example, be a TMR sensor, a GMR sensor, an AMR sensor, or a Hall sensor.

[0017] The at least two opposing magnetic field sensors can be arranged on opposite longitudinal sides of a busbar held in the fixture. The busbar is preferably a flat busbar with a rectangular cross-section. The at least two opposing magnetic field sensors can be arranged on the two wider of the four longitudinal sides of the flat busbar. A touch guard with busbars of rectangular cross-section is described in DE 10 2016 107 565 A1. Preferably, at least two magnetic field sensors are arranged on each of the at least two opposite longitudinal sides. At least one of the magnetic field sensors can be integrated into a retaining and / or contact base of the connection adapter. The retaining base can be configured to engage behind one of the busbars.At least one of the magnetic field sensors, preferably a magnetic field sensor integrated into a holding base of a connection adapter, can be arranged on a longitudinal side of a busbar facing away from the cover.

[0018] The magnetic shield and the at least one magnetic field sensor, preferably the at least two opposing magnetic field sensors, can be arranged in the same plane, which preferably extends perpendicular to the longitudinal direction of the recordings. The magnetic shield can have a dimension perpendicular to the plane that is at least one dimension of a detection area of ​​the magnetic field sensors in the plane. At least one of the two opposing magnetic field sensors can be arranged on at least one of the mounting and / or contact feet of the connection adapter.

[0019] The at least one magnetic field sensor can be arranged on the at least one retaining and / or contact foot, in particular on a hook-shaped end section of the at least one retaining and / or contact foot. The retaining and / or contact foot is preferably configured to engage behind a busbar held in one of the receptacles when the connection adapter is mounted on the touch protection housing. A touch protection device with a connection adapter that has retaining and / or contact feet engaging behind the busbars is described in DE 10 2016 107 565 A1.

[0020] The connection adapter can have at least one plug-in section extending through at least one of the through-holes. The at least one magnetic field sensor can be arranged on the at least one plug-in section. The plug-in section can extend from a mounting side of the connection adapter facing the cover when the connection adapter is mounted on the touch-protection housing. The at least one magnetic field sensor can be arranged at a free end of the plug-in section. The at least one magnetic field sensor can be positioned at a distance from the free end of the plug-in section. The plug-in section can have at least one first magnetic field sensor at the free end and at least one second magnetic field sensor at a distance from the free end of the plug-in section.All magnetic field sensors of the plug-in section can be arranged in the same plane, preferably in a plane perpendicular to a longitudinal direction of the receptacles or perpendicular to a longitudinal direction of the busbars received in the receptacles.

[0021] The at least one connector section can be a printed circuit board (PCB). The at least one magnetic field sensor can be arranged on the PCB. Preferably, at least one integrated circuit for evaluating a measurement signal from the at least one magnetic field sensor or the magnetic field sensor arrangement is arranged on the PCB. The PCB can extend from a mounting side of the connector adapter that faces the cover when the connector adapter is mounted on the touch-protection housing. The at least one magnetic field sensor can be arranged at a free end of the PCB. The at least one magnetic field sensor can be arranged at a distance from the free end of the PCB.The circuit board can have at least one magnetic field sensor at its free end and at least one second magnetic field sensor located at a distance from the free end of the circuit board. All magnetic field sensors of the circuit board can be arranged in the same plane, preferably in a plane perpendicular to a longitudinal direction of the mountings or the busbars mounted in the mountings.

[0022] The at least one magnetic field sensor can be arranged at a free end of the plug-in section or at a distance from the free end of the circuit board. Preferably, the at least one magnetic field sensor can be located at the free end of the plug-in section, and a further magnetic field sensor of the sensor arrangement can be arranged at a distance from the free end on the circuit board. The circuit board can extend in a plane perpendicular to the longitudinal direction of the mountings. If the circuit board is arranged outside a housing of the connection adapter, in particular if it protrudes from the housing, the circuit board can be exposed.

[0023] The circuit board can be aligned with at least one of the retaining and / or contact feet, preferably with all of them. Preferably, all of the retaining and / or contact feet of the connection adapter are arranged in the same plane. It is particularly preferred that the magnetic shielding is also arranged in the same plane. The connection adapter can, for example, be a three-pole or a four-pole connection adapter and accordingly have three or four retaining and / or contact feet. These can be arranged in the same plane. In one embodiment, the retaining and / or contact feet are spaced apart in parallel planes, as described in DE 10 2016 107 565 A1.

[0024] The connection adapter can have at least one optical display, preferably a screen, on which a measured value derived from a sensor signal of the at least one magnetic field sensor, preferably an electric current, is shown. The connection adapter can be configured as a measuring adapter. The measuring adapter does not need to be designed to fix and contact an electrotechnical component, for example, a component of switchgear construction, on the busbar system.

[0025] The connection adapter can have a wired or wireless data interface for transmitting a sensor signal from the at least one magnetic field sensor or a measured value derived therefrom, preferably an electric current. The wireless interface can be a WLAN or an NFC interface. The connection adapter can be connected to a mobile network via the wireless interface. The interface can be unidirectional, preferably for reading at least one measurement signal from the at least one magnetic field sensor or at least one measured value derived therefrom. The interface can be bidirectional, preferably for reading at least one measurement signal from the at least one magnetic field sensor or a measured value derived therefrom and / or for transmitting a software update, for example, firmware, to the measurement adapter.

[0026] The connection adapter may include digital storage. This storage may be a memory card, preferably interchangeably inserted in a slot of the touch-protection housing. The storage may be configured to record a time history of acquired sensor signals or derived measured values.

[0027] The magnetic shield can be a single piece or a multi-piece design. It can include a cover that is adjustable, preferably displaceable, relative to the at least one magnetic field sensor, preferably a sensor arrangement with multiple magnetic field sensors. In a first position of the cover, a detection area of ​​the at least one magnetic field sensor is covered, and in a second position, the cover is uncovered. The cover can be configured to protect the at least one magnetic field sensor from magnetic fields that exceed the sensor's measuring range. For example, the connection adapter can include a sensor arrangement with magnetic field sensors of varying sensitivities, particularly magnetic field sensors with different measuring ranges. The sensor arrangement can include magnetic field sensors for detecting high magnetic field strengths and magnetic field sensors for detecting low magnetic field strengths.To protect the low-intensity magnetic field sensors from excessively high magnetic fields when high-intensity magnetic field sensors are used, the low-intensity sensors can be covered and thus protected. This allows the same connection adapter to be suitable for field-based current measurement of both high and low electric currents, eliminating the need for different connection adapters.

[0028] Further details are explained with reference to the figures below. The embodiments shown in the figures have features that, individually or in any combination, can be suitable for realizing embodiments of the invention. These show: Fig. Figure 1 shows an exemplary embodiment of a contact protection module according to the prior art in a partially exploded view, shown in perspective. Fig. 2 in schematic representation a cross-section of a first embodiment of a contact protection device according to the invention; Fig. 3 in schematic representation a section of an embodiment of a connection adapter according to the invention; Fig. 4. A schematic representation shows a cross-section of an embodiment of a contact protection device; Fig. 5. A schematic representation of a cross-section of an embodiment of a contact guard; and Fig. Figure 6 shows a schematic cross-section of another embodiment of a contact protection device.

[0029] The one in the Fig. The touch protection device 1 shown in Figure 1, according to the prior art, has a modular design and essentially consists of two central modules 16, which are connected to each other via a snap-fit ​​connection 14 and terminated at opposite longitudinal ends by an end module 15. The end modules 15 and the two central modules 16 together form the touch protection housing 2 of the touch protection device 1, which, in a manner known from the prior art, can be made, for example, of an electrically non-conductive plastic material. Three busbars 4 are safely mounted in the housing 2 and are accessible from the front of the housing 2 for electrical devices and adapters only via through-holes 6 designed as contact openings. Corresponding device adapters and contact terminals are described, for example, in EP 3 258 558 B1. Alternatively, the housing 2 can be of a single, non-modular design.The cover 5 can be removable from the base 19 or permanently connected to it. The busbars 4 are received in receptacles 3 of the base 19. The cover 5 closes the receptacles 3 to the front of the touch guard 1, through which adapters and / or electrical components can be connected to the busbars 4.

[0030] The end modules 15 have an end cap 17 and a central module extension 18. All connections 14 are designed as identical snap-fit ​​connections, allowing for any combination, particularly between the central modules 16 and the central module extensions 18. For example, to adapt the touch guard 1 shown to a given horizontal mounting plate width, the central module extensions 18 can be removed and the end caps 17 snapped directly onto the central modules 16. It is also possible to connect one or more additional central modules 16 between the two central modules 16 shown.

[0031] The Fig. Figure 2 shows an exemplary embodiment of a touch protection arrangement 1 according to the invention for a busbar system, comprising a touch protection housing 2 made of electrically insulating material, wherein the touch protection housing 2 has three receptacles 3 for each busbar 4 and a cover 5 covering the receptacles 3 for mounting connection adapters, the cover 5 having at least one series of through-openings 6 for each receptacle, which open into the respective receptacle 3. The arrangement has at least one multi-pole connection adapter 20, which is configured to extend through at least one of the through-openings 6 with retaining and / or contact feet 21. The multi-pole connection adapter 20 has a magnetic shield 7 at least between two adjacent retaining and / or contact feet 21.

[0032] The touch protection enclosure 2 can, for example, be designed as described in DE 10 2016 107 565 A1. The busbars 4 are arranged parallel to each other in a common plane. When the busbars 4 are energized with an electric current, a magnetic field is generated around the busbars 4, the field strength of which depends on the electric current through the busbar 4.

[0033] Due to the proximity of the busbars 4 to each other, the magnetic fields influence one another. For the most accurate field-based current measurement possible, it is advantageous to implement measures that reduce, and preferably largely eliminate, the mutual influence of the magnetic fields. The following is suitable for this purpose: Fig. Figure 2 shows an arrangement with a connection adapter 20, which has a shield 7. In the illustrated embodiment, the shield 7 is designed such that, when the connection adapter 20 is mounted on the touch protection housing 2, the shield 7 is arranged between two adjacent receptacles 3 for the busbars 4. For this purpose, the multi-pole connection adapter 20 has the magnetic shield 7 between adjacent retaining and / or contact feet 21, with which it projects through the opening 6 in the cover 5. The shield can be formed integrally with the retaining and / or contact feet 21 or separately from them. The magnetic shield 7 can project through the same opening 6 in the cover 5 through which one of the retaining and / or contact feet 21 also projects. Alternatively, the magnetic shield 7 can project through its own / separate opening 6 in the cover 5.Preferably the magnetic shielding 7 extends into the lower part 19 of the touch protection housing 2, in which the receptacles 3 for the busbars 4 are arranged, particularly preferably to a bottom tray of the lower part 19.

[0034] A circuit board 11 is housed in a housing 22 of the connection adapter 20. This circuit board has a plug-in section 24 for each of the three phases L1, L2, and L3. The plug-in sections 24 protrude from the housing 22 on the side facing the touch-protection housing 2. Each plug-in section has several magnetic field sensors 10. At least one magnetic field sensor 10 of the plug-in sections 24 is arranged at a free end of the plug-in section 24. Two further magnetic field sensors 10 are arranged above the free end, thus closer to the housing 20. The circuit board 11 also has at least one integrated circuit 13, in this case one integrated circuit 13 per plug-in section 24, for evaluating the sensor signals of the magnetic field sensors 10.The circuit board 11 with the three plug-in sections 24 and the integrated circuits 13 is designed as a single piece, but can also be designed as a multi-piece piece.

[0035] The retaining and / or contact feet 21 have a hook-shaped end section 23 for gripping behind the busbars 4. A further magnetic field sensor 10 is arranged on the end section 23. The magnetic field sensor 10 on the end section 23 and the at least one magnetic field sensor on the plug-in section 24 can be evaluated for differential measurement.

[0036] A display 25 can be used to output measurement signals or to operate the connection adapter 20. A data interface 26 can be a wireless interface or a wired interface, for example, an Ethernet interface or a USB interface, such as a USB Type-C interface. A digital memory 27 can be provided in the form of an SD card. A slot 28 can accommodate the SD card. The digital memory 27 can be used to store the signals acquired by the magnetic field sensors 10 and the measured values ​​derived therefrom, in particular electrical currents, over time.

[0037] The Fig. Figure 3 shows an embodiment in which the magnetic shield 7 has a cover 29 that is adjustable, preferably displaceable, relative to the sensor arrangement consisting of two sensor arrays, each with several, here nine, magnetic field sensors 10. A detection area of ​​the magnetic field sensors 10 of one of the arrays is covered in a first position of the cover 29 and uncovered in a second position of the cover 29. The cover 29 is designed to protect the magnetic field sensors 10 of one of the arrays from magnetic fields that are above the measuring range of the magnetic field sensors of that array. For example, the connection adapter can have a sensor arrangement with sensor arrays of different sensitivities, in particular magnetic field sensors 10 with different measuring ranges. The sensor arrangement can include magnetic field sensors 10 for detecting high magnetic field strengths and magnetic field sensors for detecting low magnetic field strengths.To protect the magnetic field sensors 10 for detecting low magnetic field strengths from excessively high magnetic fields when high magnetic fields are to be detected with the magnetic field sensors 10 for high magnetic field strengths, the magnetic field sensors 10 for detecting low magnetic field strengths can be covered and thus protected by the cover 29. This allows one and the same connection adapter to be suitable for the field-based current strength determination of both high and low electric currents, and in particular, eliminates the need for different connection adapters.

[0038] The Fig. Figures 4 to 6 show embodiments of a touch protection device 1 which has an additional magnetic mood 7 inside the touch protection housing 2.

[0039] The additional shielding 7 is optional and can be advantageous when particularly high measurement accuracy is required.

[0040] The Fig. Figure 4 shows an exemplary embodiment of a touch guard 1 in cross-section. The touch guard 1 comprises a touch guard housing 2. The touch guard housing 2 can essentially consist of an electrically non-conductive material, for example, a plastic. The touch guard housing 2 further comprises a shield 7, which is designed as a ferromagnetic shield.

[0041] The touch protection housing 2 has three receptacles, each for a busbar 4. The three receptacles are arranged in the same plane and can accommodate the three phases L1, L2, L3 of a busbar system. The busbars 4 can be designed as copper busbars, in particular as copper busbars with a rectangular cross-section.

[0042] The touch protection housing 2 is constructed in two parts: a lower part 19, which has the receptacles 4, and a cover 5, which closes the receptacles on the top side of the lower part 19. The busbars 4 can be contacted via through-holes 6 in the cover 5.

[0043] The magnetic shield 7 is plate-shaped and extends between adjacent receptacles 3 both longitudinally along the receptacles 3 and in the direction of passage through the openings 6 of the cover 5, thus perpendicular to a mounting plane formed by the cover 5 for mounting electrical components. In the illustration according to Fig. 2. The magnetic shield 7 extends essentially over the entire height of the touch-protection housing, from the underside of the lower part 19 to the top of the cover 5. However, embodiments in which the magnetic shield 7 is shorter are also conceivable. The shorter the magnetic shield 7, the greater the mutual interference of the magnetic fields of adjacent busbars 4. However, certain interferences can be eliminated with sufficient accuracy during signal processing.

[0044] In the present embodiment, six magnetic field sensors 10, for example TMR sensors, are provided for each receptacle 3. These sensors are assigned in pairs to one of three of the four sides of the receptacle 3 or to a rectangular busbar 4 arranged therein. However, a different number and arrangement of the sensors 10 is also conceivable. In particular, fewer sensors 10 can be provided if lower measurement accuracy is required, or if the magnetic shielding 7 is more pronounced, or if the expected currents do not exceed a certain maximum value. The person skilled in the art will select the appropriate sensors depending on the application.

[0045] The Fig. Figure 5 shows an embodiment of the touch protection 1 in which the magnetic shield 7 is trough-shaped. The shield 7 is completely enclosed around each of the receptacles 3, thus achieving complete shielding. The Fig. The embodiment shown in Figure 3 is particularly suitable when there are high requirements for the measurement accuracy of the electrical currents determined using the magnetic field sensors 10 and / or when the effort required for signal processing to compensate for interferences is to be kept to a minimum. This differs from the embodiment shown in Figure 3. Fig. 2 are in the embodiment according to Fig. 3 a total of seven magnetic field sensors 10 are provided per mounting 3, wherein two magnetic field sensors 10 are assigned to each of the two shorter longitudinal sides of the busbar 4 and three magnetic field sensors 10 are assigned to the longer longitudinal side connecting the two shorter longitudinal sides and facing away from the cover.

[0046] The Fig.Figure 6 shows an embodiment in which the magnetic field sensors 10 are at least partially arranged on an electrical circuit board 11. The circuit board 11 is made up of multiple parts. It can also be made in one piece. In contrast to the embodiment shown, all magnetic field sensors 10 can also be arranged on a single circuit board 11. On the side facing the mounts 3, the circuit board has the magnetic field sensors 10. On the side facing away from the mounts 3, the circuit board 11 has a strip-shaped magnetic shield 12. Also on the side facing away from the mounts 3, i.e., in an area magnetically shielded by the strip-shaped shield 12, the circuit board 11 has an integrated circuit 13 for evaluating the sensor signals of the magnetic field sensors 10.

[0047] The features disclosed in the foregoing description and in the figures may be relevant individually or in any combination for the realization of embodiments of the invention, the scope of protection being determined by the claims. Reference symbol list: 1. Protection against contact 2 touch protection housings 3 recordings 4 busbar 5 Cover 6 Passage opening 7 Shielding 8 Interruption 9 tub 10 Magnetic field sensor 11 circuit board 12 strips 13 integrated circuit 14 rest connection 15 End module 16 Central module 17 End cap 18 Central module expansion 19 Lower part 20 connection adapters 21 Holding and / or contact foot 22 cases 23 Final section 24 Plug section 25 optical display 26 Data interface 27 digital storage 28 slots 29 Cover

Claims

[1] Touch protection arrangement (1) for a busbar system, comprising a touch protection housing (2) made of electrically insulating material, wherein the touch protection housing (2) has several receptacles (3) for busbars (4) and a cover (5) covering the receptacles (3) for mounting connection adapters, wherein the cover (5) has at least one series of through-holes (6) for each receptacle (3) opening into the respective receptacle (3), and wherein the arrangement comprises at least one multi-pole connection adapter (20) configured to reach through at least one of the through-holes (6) with at least two retaining and / or contact feet (21), characterized by , that the at least one single- or multi-pole connection adapter (20) has a magnetic shield (7) at least between two adjacent of the at least two holding and / or contact feet (21). [2] Touch protection arrangement (1) according to claim 1, wherein the magnetic shield (7) has a ferromagnetic material or consists of a ferromagnetic material. [3] Touch protection arrangement (1) according to claim 1 or 2, wherein the magnetic shielding (7) is arranged at least partially in a housing (22) of the connection adapter (20) with which the connection adapter (20) can be mounted on the cover (5). [4] Touch protection arrangement (1) according to one of the preceding claims, wherein the magnetic shielding (7) extends at least partially through at least one of the passage openings (6) when the connection adapter (20) is mounted on the cover (5). [5] Contact protection arrangement (1) according to claim 4, wherein the magnetic shielding (7) extends at least partially in alignment with at least one of the at least two retaining and / or contact feet (21). [6] Contact protection arrangement (1) according to claim 4 or 5, wherein the magnetic shielding (7) extends at least partially through the same of the passage openings (6) through which one of the retaining and / or contact feet (21) extends when the connection adapter (20) is mounted on the cover (5). [7] Touch protection arrangement (1) according to one of the preceding claims, wherein the connection adapter (20) has at least one magnetic field sensor (10), preferably a sensor arrangement with several magnetic field sensors (10), of which at least two magnetic field sensors (10) are particularly preferably arranged opposite each other with respect to at least one of the receptacles (3) for busbars (4). [8] Contact protection arrangement (1) according to claim 7, wherein the at least two oppositely arranged magnetic field sensors (10) are arranged on opposite longitudinal sides of a busbar (4) received in the receptacle (3), wherein the busbar (4) is preferably a flat rail with a rectangular cross-section and the at least two oppositely arranged magnetic field sensors (10) are arranged on the two wider of the four longitudinal sides of the flat rail. [9] Touch protection arrangement (1) according to claim 7 or 8, wherein the magnetic shield (7) and the at least two oppositely arranged magnetic field sensors (10) are arranged in the same plane perpendicular to the longitudinal direction of the receptacles (3). [10] Contact protection arrangement (1) according to one of claims 7 to 9, wherein at least one of the opposing magnetic field sensors (10) is arranged on at least one of the holding and / or contact feet (21). [11] Touch protection arrangement (1) according to claim 10, wherein the at least one magnetic field sensor (10) is arranged on the at least one retaining and / or contact foot (21) on a hook-shaped end section (23) of the at least one retaining and / or contact foot (21), which is preferably configured to engage behind a busbar (4) received in one of the receptacles (3) when the connection adapter (20) is mounted on the touch protection housing (2). [12] Touch protection arrangement according to one of claims 7 to 11, wherein the connection adapter (20) has at least one plug-in section (24) with which the connection adapter (20) extends through at least one of the through-holes (6), wherein the at least one magnetic field sensor (10) is arranged on the at least one plug-in section (24). [13] Touch protection arrangement according to claim 12, wherein the at least one plug section (24) has a printed circuit board (11) or is a printed circuit board (11) on which the at least one magnetic field sensor (10) is arranged, wherein preferably at least one integrated circuit (13) for evaluating a measurement signal of the at least one magnetic field sensor (10) or the magnetic field sensor arrangement is arranged on the printed circuit board (11). [14] Touch protection arrangement according to claim 12 or 13, wherein the at least one magnetic field sensor (10) is arranged at a free end of the plug section (24) or spaced apart from the free end of the circuit board (11), wherein preferably the at least one magnetic field sensor (10) is arranged at the free end of the plug section (24) and a further magnetic field sensor (10) of the sensor arrangement is arranged spaced apart from the free end on the circuit board (11). [15] Touch protection arrangement according to one of claims 12 to 14, wherein the circuit board (11) extends in a plane perpendicular to the longitudinal direction of the receptacles (3). [16] Touch protection arrangement according to one of claims 12 to 15, wherein the circuit board (11) is aligned with at least one of the retaining and / or contact feet (21), preferably with all retaining and / or contact feet (21), wherein preferably all of the retaining and / or contact feet (21) of the connection adapter (20) are arranged in the same plane, and wherein the magnetic shielding (7) is particularly preferably arranged in the same plane. [17] Touch protection arrangement according to one of claims 7 to 16, wherein the connection adapter (20) has at least one optical display (25), preferably a display, on which a measured value derived from a sensor signal of the at least one magnetic field sensor (10), preferably an electric current, is displayed. [18] Touch protection arrangement according to one of claims 7 to 17, wherein the connection adapter (20) has a wired or wireless data interface (26) for the transmission of a sensor signal from the at least one magnetic field sensor (10) or a measured value derived therefrom, preferably an electric current. [19] Touch protection arrangement according to one of claims 7 to 18, wherein the connection adapter (20) has a digital memory (27), preferably a memory card, which is interchangeably received in a slot (28) of the touch protection housing (2). [20] Touch protection arrangement (1) according to one of claims 7 to 19, wherein the magnetic shield (7) has a cover (29) which is adjustable, preferably displaceable, relative to the at least one magnetic field sensor (10), preferably a sensor arrangement with several magnetic field sensors (10), wherein a detection area of ​​the at least one magnetic field sensor (10) is covered in a first position of the cover (29) and is released in a second position of the cover (29).

Images