Arrangement with a feed-through terminal, feed-through terminal and insulating plate for the arrangement

Abstract

Arrangement with a feed-through terminal with a separate insulating plate (8) for passing an electrical conductor through a wall, the feed-through terminal comprising: - a terminal housing (2) and a further terminal housing (3), wherein the terminal housing (2) is brought from one side and the further terminal housing (3) from an opposite side to a wall opening (1a) formed in a wall (1) and are coupled to one another through the wall opening (1a), accommodating the wall (1) between them, - at least one electrical connection in the terminal housing (2) and at least one associated electrical connection in the further terminal housing (3) and - at least one electrical connector (6) which projects from a side of the terminal housing (2) which is proximal to the wall (1) and, when the terminal housing (2) and the further terminal housing (3) are coupled, connects the at least one electrical connection and the at least one associated electrical connection through the wall opening (1a), wherein the insulating plate (8) is arranged between the terminal housing (2) and the further terminal housing (3) as a creepage current protection device, which has an insulating plate (8) between the terminal housing (2) and the wall (1) and / or between the further terminal housing (3) and the wall (1), wherein the at least one electrical connector (6) passes through an opening (9) in the insulating plate, characterized in thatthat the insulating plate (8) as the creepage current protection device has an electrical insulating collar (10) which surrounds the at least one electrical connector (6) continuously or intermittently and extends in the feed-through direction of the at least one electrical connector (6).

Description

[0001] The invention relates to an arrangement with a feed-through terminal for passing an electrical conductor through a wall, a feed-through terminal and an insulating plate therefor. background

[0002] Feed-through terminals are used in a wide variety of applications to route single- or multi-core electrical conductors through an opening in a wall, where the wall can be, in particular, an appliance or enclosure wall. In a typical design, the electrical conductor is brought to the wall feed-through terminal on one side of the wall and contacted with an associated contact terminal. On the opposite side of the wall, a conductor section carrying the conductor is then connected to the associated contact terminal.

[0003] For example, wall feed-through terminals are known as plug-in connections.

[0004] Of particular importance is the mechanically sufficiently strong mounting of the wall feed-through terminal to the wall. Various fastening devices have been proposed for this purpose. Document DE 20 2010 010 424 U1 proposes a fastening device with a locking component which, in order to fix the wall feed-through terminal to the wall, is moved along a rail assigned to the locking element, which runs along the feed-through direction for the electrical conductor. In the locked position, associated toothings then engage with each other, whereby the locking element is locked. Documents DE 10 2008 024 366 A1 and DE 10 2009 004 136 A1 describe wall feed-through terminals in which housing parts arranged on both sides of the wall feed-through are plugged together in such a way that, when plugged together, associated toothings in turn engage with each other and thus lock the housing parts together.The mutually associated functional surfaces with locking elements are formed on plug-in elements that are formed perpendicular to the surface of the wall opening on the terminal housing parts.

[0005] Document US 3,337,836 A also discloses a wall feedthrough terminal in which opposing housing parts are plugged together starting from both sides of the wall feedthrough. To secure the wall feedthrough terminal, elastic locking elements extending in the longitudinal direction of the conductor feedthrough are provided on the housing parts. The elastic locking elements are arranged on the outer side surfaces of the housing parts. Utilizing a similar functional principle, the wall feedthrough terminal in document DE 199 02 805 A1 provides elastically deformable fastening elements that are pushed back toward the housing when the terminal housing is inserted into the wall feedthrough and ultimately lock into the wall.

[0006] Document EP 1 636 880 B1 describes a fastening device for a wall feedthrough terminal, in which locking elements are attached to the outside of the terminal housing on both sides, allowing the terminal housing to be secured in the wall opening on both sides. The locking element is formed with a pivotable actuating wedge that is integrally formed on the locking element. In the locked position, the teeth of the associated functional surfaces engage with each other.

[0007] A plug connection between mutually associated terminal housing parts of a wall feed-through terminal, in which structured functional surfaces lock together in the locking position, is also disclosed in the document DE 198 01 260 A1.

[0008] Document DE 36 13 681 C1 discloses an electrical terminal for passing a cable through a housing wall. The terminal housing of the terminal is constructed in two parts. An outer part and an inner part are locked together.

[0009] The document DE 199 52 431 A1 describes a connection group for a power converter device with a carrier plate in whose base surface recesses for snapping in insulation parts are made in a predetermined manner.

[0010] An electrical connection terminal for passing a line through a wall, having a first terminal for attachment to a first side of the wall and a second terminal for attachment to the second side of the wall, wherein the second terminal or first terminal can be inserted with a fastening means from the first side or second side of the wall through the wall into the first terminal or second terminal and / or the fastening means can be snapped onto the second terminal or first terminal in such a way that the second terminal or first terminal can be fastened to the wall from the second side or first side of the wall, is disclosed in the document DE 10 2009 017 815 A1.

[0011] DE 20 2007 017 267 U1 relates to an insulating tape with an insulating layer made of rigid insulating material. The insulating tape comprises a carrier layer and segments of the insulating layer made of rigid insulating material, which are adhesively attached to one side of the carrier layer. The segments of the insulating layer are separated from one another by incisions arranged at predetermined intervals and are connected to one another via the carrier layer. In the expanded, planar state of the insulating tape, the segments form a substantially continuous insulating layer.

[0012] DE 93 01 522 U1 discloses a printed circuit board with insulating walls formed by a rollable strip of insulating material, the longitudinal direction of which runs in the row direction of solder pins and extends over several pole chambers. Summary

[0013] The object of the invention is to provide an arrangement with a feedthrough terminal for passing an electrical conductor through a wall, as well as a feedthrough terminal with improved leakage current protection. In particular, the arrangement should also be usable for higher voltages, for example, voltages up to at least approximately 1000 volts.

[0014] To achieve the object, an arrangement with a feedthrough terminal with a separate insulating plate for passing an electrical conductor through a wall is provided according to independent claim 1. Advantageous embodiments are the subject of dependent subclaims.

[0015] One example concerns a feed-through terminal for passing an electrical conductor through a wall.

[0016] Another example relates to an insulating plate for an arrangement in which adjacent plate sections, each having a respective opening for passing through an electrical connector, are connected via a predetermined breaking point.

[0017] The design of the creepage current protection device provides improved protection against disruptive creepage currents in conjunction with the wall feedthrough of the electrical conductor. The creepage current protection device can be used in conjunction with conventional feedthrough terminals. This allows the feedthrough terminals, which were initially designed only for the transmission of lower voltages, to also be used for comparatively higher voltage ranges without requiring structural modifications to the terminal housing, although such modifications may be required, for example, to optimize the effectiveness of the creepage current protection device.The design of the creepage current protection device with the insulating or adapter plate arranged between the terminal housings enables the flexible and cost-effective provision of a feed-through terminal even for higher voltage ranges, for example for wall feed-through at voltages of at least 1000 volts.

[0018] The electrical connector that passes through the wall opening and connects the electrical connections in the terminal housings cannot be in detachable contact with the electrical connection in the terminal housing.

[0019] The insulating plate can be made entirely of an electrically insulating material, such as plastic. The insulating plate can be designed as an injection-molded part.

[0020] The feed-through terminal can be used in conjunction with walls made of electrically conductive and / or electrically non-conductive material.

[0021] The tracking current protection device can be designed in one or more parts. In the case of a multi-part design, it can be provided that an insulating plate is arranged on each side of the wall.

[0022] A further development provides that a distal end of the at least one electrical connector is inserted into the further terminal housing through an electrical insulating housing section which is integrally formed on the further terminal housing, extends from there perpendicular to the surface of the wall through the wall opening and surrounds the at least one electrical connector in an electrically insulating manner, at least in the region of the wall opening. With the aid of the electrical insulating housing section, an insulating channel can be formed through which the at least one electrical connector runs. The electrical insulating housing section can extend over the entire area between the terminal housings or only a part thereof. In particular on the terminal housing side, the electrical insulating housing section can extend into the terminal housing.A continuous insulating channel for the at least one electrical connector can be formed between the mutually facing sides of the terminal housings. The electrical insulating housing section can accommodate the at least one electrical connector in a form-fitting manner.

[0023] In one embodiment, the terminal housing and the further terminal housing can be coupled to one another by means of a plug-in connection. The plug-in connection can be provided with one or more locking or snap-in elements. In one embodiment, locking or snap-in elements are arranged on the electrically insulating housing section, for example, on an outer side.

[0024] One embodiment provides that the insulating plate is held in place in the region between the terminal housing and the further terminal housing by means of one or more fastening elements formed on the insulating plate itself, the terminal housing, the further terminal housing and / or the wall. The electrically insulating plate (insulating plate) can be releasably held and fixed in place by means of the one or more fastening elements. In one embodiment, the insulating plate has, on a side facing the terminal housing, locking or snap-in elements which can engage in associated openings on the terminal housing when the insulating plate is arranged and positioned between the terminal housings. A reverse embodiment can also be provided, in which locking or snap-in elements are formed on the terminal housing and then engage in associated openings on the insulating plate during assembly.A combination of locking or snap-in elements can be provided on both the terminal housing and the insulating plate. The above statements apply accordingly to the possible provision of one or more locking or snap-in elements on the additional terminal housing and / or the wall.

[0025] A preferred development provides that the insulating plate is fastened to the wall, to the terminal housing and / or to the further terminal housing by means of an additional fastening device. The additional fastening device can, for example, provide one or more screw connections. Thus, the insulating plate can be fastened to the terminal housing and / or to the further terminal housing alone or together with the wall by means of one or more screw means. The additional fastening device can have lateral fastening means formed outside the intermediate region between the terminal housings. Additionally or alternatively, central fastening means can be provided which are arranged in the region between the mutually facing sides of the terminal housing. The various fastening means can have openings or bores for receiving screw means.Lateral fastening means can, for example, have lateral tabs with a cutout for forming a screw connection. In the case of a screw connection, recesses can be provided to accommodate a screw head. The recesses can be formed on one or both terminal housings and / or on the wall.

[0026] The insulating plate as the tracking current protection device has an electrical insulating collar that surrounds the at least one electrical connector continuously or intermittently and extends in the feed-through direction of the at least one electrical connector. The electrical insulating collar can surround the electrical insulating housing section that passes through the wall opening. The electrical insulating collar can be formed on one of the terminal housings and / or on the insulating plate itself. In one embodiment, the electrical insulating collar engages in the wall opening, for example, in a form-fitting manner, particularly with regard to the circumference. If fastening elements such as locking or snap-in lugs are provided on the insulating plate, the electrical insulating collar can protrude towards the other side of the insulating plate.

[0027] A further development provides for a series arrangement of electrical terminals and associated electrical terminals to be formed, extending transversely to the feed-through direction of the at least one electrical connector. For example, the series arrangement can comprise at least four combinations of electrical terminal and associated electrical terminal. The elements of the series arrangement can be designed similarly, in particular with regard to the electrical connector and / or its insulation by means of the electrical insulating housing section.

[0028] In one embodiment, it can be provided that the insulating plate extends over at least part of the series arrangement in such a way that openings in the insulating plate assigned to the series arrangement are penetrated by a respective electrical connector of the electrical connections and the assigned electrical connections. The insulating plate can be formed continuously in the area between the terminal housings, which accommodate the electrical connections and the assigned electrical connections on both sides of the wall, encompassing all elements of the series arrangement. However, it is also possible for the insulating plate to be formed between only individual elements of the series arrangement. This then represents a possible embodiment of the multi-part insulating plate in the arrangement. Description of implementation examples

[0029] Further embodiments are explained in more detail below with reference to the figures of a drawing. Herein: Fig. 1 a perspective view of an arrangement with a feed-through terminal for passing an electrical conductor through a wall, wherein terminal housings of the feed-through terminal are separated from each other, Fig. 2 another perspective view of the arrangement from Fig. 1, Fig. 3 a perspective view of the arrangement according to Fig. 1, Fig. 4 a further perspective view of the arrangement according to Fig. 2 Fig. 5 a representation of the arrangement from Fig. 1 from the side, Fig. 6 a representation of a section of the arrangement from Fig. 1 from top, Fig. 7 a perspective view of an insulating plate for an arrangement with a feed-through terminal for passing an electrical conductor through a wall and Fig. 8 another perspective view of the insulation plate from Fig. 7.

[0030] Fig. 1 shows a perspective view of an arrangement with a feed-through terminal for passing an electrical conductor through a wall 1, wherein the feed-through terminal is formed with a terminal housing 2 and a further terminal housing 3, which are guided from opposite sides towards the wall 1 during assembly of the feed-through terminal and then connected to one another, which is done in the illustrated embodiment by means of a plug connection. For this purpose, electrically insulating housing sections 4, which are formed integrally on the further terminal housing 3, have locking elements 5. Furthermore, electrical connectors 6, which according to Fig. 2 protrude from the terminal housing 2, further locking elements 7 are provided. The terminal housings 2, 3 of the feed-through terminal are secured to one another by means of the various locking elements 5, 7, if necessary in addition to other securing elements.

[0031] When the terminal housing 2 and the further terminal housing 3 are joined together, the wall 1 is arranged between them. In the space between the terminal housing 2 and the further terminal housing 3, an insulating or adapter plate 8 is also provided, which has openings 9 through which the electrical connectors 6 extending from the terminal housing 2 extend, which are also guided through wall openings 1a. In the area of ​​the openings 9, a circumferential insulating collar 10 is formed, which encompasses the associated electrical connector 6 and extends in the feed-through direction (longitudinal direction of the electrical connector 6) away from the insulating plate 8 on a front side 11 of the insulating plate 8.

[0032] According to Fig. 1, the insulating plate 8 has on a rear side 12 in the region of the openings 9 locking or snap-in elements 13 which engage in associated openings on the terminal housing 2 so that the insulating plate 8 is held thereon.

[0033] The insulating plate 8, which consists entirely or partially of an electrically insulating material, for example plastic, further comprises additional openings 14, which are arranged above and below the openings 9. The additional openings 14 can be used to guide a screw through each of them in order to secure the insulating plate 8 and wall 1 to the terminal housing 2. If such screws, which are in the Fig. 1 and Fig. 2 are not shown for simplification, are provided for fastening, the screw heads lie in associated recesses 15 on the further terminal housing 3 after the terminal housing 2 and further terminal housing 3 have been plugged together (cf. Fig. 1).

[0034] The insulation plate 8 has, according to the Fig. 1 and Fig. 2 via lateral fastening tabs 16, which are arranged outside the area between the terminal housings 2, 3 and can be used for additional fastening.

[0035] The Fig. 3 and Fig. 4 show further perspective views of the arrangement according to the Fig. 1 and Fig. 2, whereby the terminal housings 2, 3 now, in contrast to the Fig. 1 and Fig. 2, are drawn with solid lines.

[0036] The Fig. 5 and Fig. 6 show the arrangement with the feed-through terminal from above and from the side.

[0037] The Fig. 7 and Fig. 8 show perspective views of the insulating panel 8 from the front and back. Adjacent panel sections of the insulating panel 8 are connected to each other via a respective predetermined breaking point 8a, so that individual partial insulating panels can be produced by separating adjacent panel sections.

[0038] The features disclosed in the above description, the claims and the drawings may be important for the realization of the various embodiments both individually and in any combination.

Claims

[1] Arrangement with a feed-through terminal with a separate insulating plate (8) for passing an electrical conductor through a wall, the feed-through terminal comprising: - a terminal housing (2) and a further terminal housing (3), wherein the terminal housing (2) is brought from one side and the further terminal housing (3) from an opposite side to a wall opening (1a) formed in a wall (1) and are coupled to one another through the wall opening (1a), accommodating the wall (1) between them, - at least one electrical connection in the terminal housing (2) and at least one associated electrical connection in the further terminal housing (3) and - at least one electrical connector (6) which protrudes from a side of the terminal housing (2) that is proximal to the wall (1) and, when the terminal housing (2) and the further terminal housing (3) are coupled, connects the at least one electrical connection and the at least one associated electrical connection through the wall opening (1a), wherein the insulating plate (8) is arranged between the terminal housing (2) and the further terminal housing (3) as a creepage current protection device, which has an insulating plate (8) between the terminal housing (2) and the wall (1) and / or between the further terminal housing (3) and the wall (1), wherein the at least one electrical connector (6) passes through an opening (9) in the insulating plate, characterized bythat the insulating plate (8) has, as the creepage current protection device, an electrical insulating collar (10) which surrounds the at least one electrical connector (6) continuously or intermittently and extends in the feed-through direction of the at least one electrical connector (6). [2] Arrangement according to claim 1, characterized by in that a distal end of the at least one electrical connector (6) is inserted into the further terminal housing (3) through an electrical insulating housing section (4) which is integrally formed on the further terminal housing (3), extends therefrom perpendicular to the surface of the wall (1) through the wall opening (1a) and surrounds the at least one electrical connector (6) in an electrically insulating manner at least in the region of the wall opening (1a). [3] Arrangement according to claim 1 or 2, characterized by that the terminal housing (2) and the further terminal housing (3) are coupled to one another by means of a plug connection. [4] Arrangement according to at least one of the preceding claims, characterized by that the insulating plate (8) is held in the area between the terminal housing (2) and the further terminal housing (3) by means of one or more fastening elements which are formed on the insulating plate (8) itself, the terminal housing (2), the further terminal housing (3) and / or the wall (1). [5] Arrangement according to at least one of the preceding claims, characterized by that the insulating plate (8) is fastened to the wall (1), to the terminal housing (2) and / or to the further terminal housing (3) by means of an additional fastening device. [6] Arrangement according to at least one of the preceding claims, characterized by that a series arrangement of electrical connections and associated electrical connections is formed which extends transversely to the feed-through direction of the at least one electrical connector (6). [7] Arrangement according to claim 6, characterized by that the insulating plate (8) extends over at least part of the series arrangement, such that openings in the insulating plate (8) assigned to the series arrangement are penetrated by a respective electrical connector of the electrical connections and the assigned electrical connections.

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