EP2606535B1 - Electrical wall bushing terminal - Google Patents

Description

The present invention relates to an electrical wall feed-through terminal with a housing and with a contact device on which at least one plug-in zone for receiving a test and / or disconnect plug is provided. In this case, a test plug or a disconnect plug or a test and disconnect plug can be inserted into the plug-in zone. It is also possible that the test and / or disconnect plug acts as a shorting plug.

There are known in the art various electrical wall feed-through terminals, which have a plug-in zone for receiving a test and / or disconnect plug.

Often, such wall feed-through terminals are designed as terminal blocks or test terminal block and have conductor connection elements and associated current bars, wherein the conductor connection elements make contact contacting in a contact area, if no test plug has been introduced.

Such wall feed-through terminals with separation options are often used in the switching, measuring and control technology. Due to the ability to isolate at the electrical terminal block, different functions and different test options can be realized by inserting different plugs or isolating plugs. In particular, test plugs can also be used as plugs in addition to simple isolating plugs or through connectors. Such test plugs may have special components that verify the proper functioning of the circuit connected to the wall feed-through terminal. Optionally, different functions can be checked simultaneously or successively by means of different test plugs.

If the wall feed-through terminals are disc-shaped as an electrical terminal block, they can be plugged together with several other electrical terminals to form a terminal block. In such a terminal block can then be plugged into the number of terminal blocks corresponding number of test plugs. It is possible that a test plug block is formed, which is inserted in total in the terminal block.

The DE 299 17 825 U1 relates to a connecting element or a feed-through connector, in which a plurality of juxtaposed bus bars are provided in a housing. A conductor can be plugged into a specific connection opening and thus connected to one of the busbars. In this case, individual busbars can be connected to each other by inserting cross connector bridges. For this feed shafts are provided, over which de busbars can be contacted from above and from below with cross-connector bridges.

With the DE 10 2006 052 894 A1 a test terminal block of electrical terminal blocks has become known, which has at each terminal a Einsteckzone for inserting a test plug. In this known terminal two contact areas are present at the plug-in zone for receiving the contact plug, which are formed from contact legs, wherein the contact legs in the touch first contact area in the ground state, while the contact legs are spaced apart in the second contact area. The second contact area is first touched upon insertion of a test plug from the disconnect plug. When inserting a test plug, the latter first contacts the second contact area and establishes a test connection. Only upon further insertion of the test plug contacted the first contact area and urges the resiliently adjacent contact legs apart.

As a result of this embodiment, it is ensured with such a terminal that the test plug first reliably establishes contact with the second contact region before the electrical connection is disconnected at the first contact region. The known state of the art works reliably.

Often it is not necessary during inspection or maintenance work on control cabinets or housings of electrical systems to open the cabinet to perform a test. In many cases, it is sufficient, for example, if a wall feed-through terminal is accessible as a terminal with a plug-in zone for a test plug from the outside to the cabinet to inexpensively check the state of the electrical circuit by inserting a test plug. In such cases, it is very advantageous if such a wall bushing clamp is mounted accessible on the outside of the cabinet. The disadvantage of this is that in other more extensive or basic testing and / or maintenance provided with a plug-in zone for a test plug Wall feed-through terminal is arranged on the outside of the housing of the cabinet, even if the cabinet is open. As a result, the maintenance effort increases when the door of the cabinet has to be opened, since the maintenance person must then always plug the test plug from the outside of the cabinet, even if he has to do a lot of maintenance inside the cabinet.

It is therefore an object of the present invention to provide a wall feed-through terminal with a plug-in zone for a test and / or disconnect plug available, which works reliably and allows less effort in the performance of maintenance.

This object is achieved by an electrical wall feed-through terminal having the features of claim 1. Preferred developments are subject of the dependent claims. Further advantages and features of the invention will become apparent from the embodiment.

The electrical wall feed-through terminal according to the invention, which can be mounted on a wall, has a housing and a contact device, on which at least one plug-in zone for receiving a test and / or isolating plug is provided. The electrical wall feed-through terminal according to the invention has a first conductor connection, which is connected to a first contact unit of the contact device. Furthermore, at least one second conductor connection is provided, which is connected to a second contact unit of the contact device. The housing has on at least two sides insertion openings, of which in each case at least one test and / or disconnect plug in the at least one Plug-in zone for contacting the first and second contact unit can be inserted. In this case, a test and / or disconnect plug can be inserted into the insertion opening on one side from one wall side of the wall and into the insertion opening on the other side from another wall side of the wall.

The electrical wall feed-through terminal according to the invention has many advantages, among other things because the housing of the electrical wall feed-through terminal of at least two sides of insertion has, at which at least one test and / or disconnect plug is inserted to check the connected to the electrical wall feed-through terminal circuit and / or to be able to disconnect the electrical circuit.

The inventive electrical connection terminal makes it possible to carry out the maintenance of an electrical circuit, wherein the test and / or disconnect plug can be inserted from two sides into the housing of the electrical connection terminal. For this example, the electrical terminal can be used in the housing wall, so that it is possible to insert the test and / or disconnect plug either from the inside of the cabinet or from the outside into the wall of the cabinet.

The electrical wall feed-through terminal offers the possibility of introducing at least two sides of a test and / or disconnect plug into the electrical terminal, wherein in each case the first and second contact unit of the contact device of the electrical terminal can be contacted. By this embodiment of the invention is a flexible Connection terminal provided, which is inexpensive to use and practically replaces the function of two test terminals, where the space requirement is the same as in a single terminal block from the prior art.

In a preferred embodiment, the insertion openings are provided on opposite sides of the housing. Such a configuration allows the use in the wall of a cabinet or in the door of a cabinet, with subsequently a plug-in zone of the electrical terminal from the outside and wherein the plug-in zone or another plug-in zone is accessible from the inside. This makes it possible when performing maintenance on control cabinets, both to plug a test and / or disconnect plug from the outside when the cabinet door is closed or even with the cabinet door open from the inside to insert. This considerably facilitates the performance of testing and maintenance work and can also significantly contribute to avoiding faulty maintenance work. The risk of accidents at work also decreases because the cables to the test and / or disconnect plugs do not have to be guided around an upright cabinet door or the like.

After acceptance and commissioning of a system, a disconnect and / or test plug can be easily plugged from the outside into the plug-in zone on the closed control cabinet wall and the condition of the system can be checked, for example during routine maintenance. On the other hand, during commissioning or during more complex maintenance work, when the control cabinet has to be opened anyway or is still open, the disconnect and / or test plug can be connected directly from inside be introduced into the plug-in zone. An elaborate closing the cabinet door before plugging the separation and / or test plug in the plug-in zone can be omitted. As a result, the invention offers considerable advantages both during startup and during later maintenance operations.

For a plugging from the inside, in particular the polarity of the separation and / or test plug is mirrored for outdoor use. This requires that the disconnect and / or test plug in relation to the test application by means of measuring leads to be wired mirrored with the measuring / testing equipment accordingly.

It is possible to use a special disconnect and / or test plug for plugging from the inside and the use of a different wired disconnect and / or test plug for plugging in from the outside.

But it is also possible that an electronics is installed in the separation and / or test plug, which automatically detects the plug-in direction and adapts, so that from the outside and inside identical separation and / or test plug can be used. It is also possible to provide the disconnect and / or test plug with a switch that switches the wiring according to the insertion of inside or outside manually or automatically.

The same applies to other distribution boxes, junction boxes or the like. After opening such a separation and / or test plug can be inserted from the inside, while closed Distribution box of the separation and / or test plug is inserted from the outside.

The first contact unit is preferably connected to the first conductor connection via a first current bar. Preferably, furthermore, the second contact unit is connected to the second conductor connection via a second current bar. It is also possible that even a third, fourth or fifth conductor connection is provided on an electrical wall feed-through terminal. It is also possible that a plurality of terminals in the form of terminal blocks as a terminal block as a whole are provided as a wall feed-through terminal block, at which then two, three or more conductor terminals are provided. In the case of terminal blocks, it is additionally possible to provide a plug-in facility for at least one transverse bridging in order to set two or more conductor connections to the same potential.

In a preferred development, at least one contact unit has two spatially spaced first and second contact sections. Such an embodiment is very advantageous because it can be ensured that when contacting by a test and / or disconnect plug first contact to the inserted plug is made at the first (or second) contact portion, while only then the connection between the first and the second conductor terminal at the second (or first) contact section. As a result, safe and reliable operation is ensured, in particular in the case of sensitive electrical installations and / or in the case of high voltages and / or high-acting currents.

It is particularly preferred that in the ground state, the first and the second contact unit at the first and the second contact portion electrically conductively touch. A ground state is understood here to be the state in which no test and / or isolating plug is inserted into the corresponding plug-in zone. This means that the two contact units in the ground state are electrically conductively connected to one another at two mutually remote contact sections. The two contact sections independently provide for a reliable electrical connection of the first and the second contact unit and thus of the first conductor connection to the second conductor connection.

This development is particularly advantageous, since thereby the insertion of a test and / or disconnect plug is independent of the order of arrangement of the first and second contact portion. If the test and / or disconnect plug is inserted from the side of the first contact section and if, for example, the first contact unit is inserted first, the electrically conductive contact at the second contact section remains intact even after the contact has been separated at the first contact section. Only when a complete or at least almost complete insertion of the separating and / or test plug of the electrically conductive contact at the second contact portion is separated. At the time of the separation at the second contact section, however, the separating and / or test plug has already reliably contacted the first contact section. In the case of introduction from the other side, the same applies in the reverse order, when in the ground state the first Contact unit and the second contact unit at the first and the second contact portion electrically conductively touch.

Preferably, at least one contact unit is at least partially made of a resilient material. Particularly preferably, both contact units consist at least partially and in particular substantially or completely of one or more resilient materials. But it is also possible if only one contact unit partially made of a resilient material, as by the spring action of this contact unit reliable electrical contact with the other contact unit is possible.

In preferred embodiments, at least one contact unit comprises at least one contact leg. Such a contact leg may be formed in particular as a long loop. Since the length of the loop is greater than its width, there is a long loop. The length of the elongated loop is in particular at least 1.5 times and preferably at least twice as large as a width extending transversely thereto.

Such a loop may be formed as a closed or open loop. Possible and preferred, for example, is an approximately U- or C-shaped configuration, in which the first and the second contact section are provided in the two end regions of the "C". By a C-shaped configuration spaced-apart portions are provided which provide a spatial separation of the first and the second contact portion allow. The spatial separation allows the temporally and spatially successive separation of the contact portions, in particular in any order depending on the insertion direction.

Particularly preferably, the electrical wall feed-through terminal is designed as an electrical terminal block. In the case of the wall feed-through terminal, a disconnect and / or test plug and / or short-circuit plug can be inserted through the wall of a connection cabinet, for example into the housing of the connection terminal, from two or more sides.

Further advantages and features of the present invention will become apparent from the embodiment, which will be explained below with reference to the accompanying figures.

Fig. 1

eine perspektivische Ansicht einer erfindungsgemäßen Wanddurchführungsklemme mit eingeführtem Prüfstecker;

Fig. 2

einen stark schematisierten Querschnitt einer Wanddurchführungsklemme;

Fig. 3

die Kontakteinheit der Wanddurchführungsklemme nach Fig. 2;

Fig. 4

die Wanddurchführungsklemme nach Fig. 1 mit einem von einer ersten Seite eingesteckten Prüfstecker;

Fig. 5

die Wanddurchführungsklemme nach Fig. 1 mit einem von der anderen Seite eingesteckten Prüfstecker; und;

Fig. 6

eine stark schematische Draufsicht auf einen Schaltschrank mit erfindungsgemäßen Wanddurchführungsklemmen.

Show:

Fig. 1

a perspective view of a wall feed-through terminal according to the invention with inserted test plug;

Fig. 2

a highly schematic cross-section of a wall feed-through terminal;

Fig. 3

the contact unit of the wall feed-through terminal after Fig. 2 ;

Fig. 4

the wall feed-through terminal after Fig. 1 with a test plug inserted from a first side;

Fig. 5

the wall feed-through terminal after Fig. 1 with a test plug inserted from the other side; and;

Fig. 6

a highly schematic plan view of a cabinet with wall feed-through terminals according to the invention.

With reference to the enclosed FIGS. 1 to 6 An exemplary embodiment of the electrical wall feed-through terminal 1 according to the invention is explained below, which is designed here as an electrical terminal block 30 and in particular as a wall feed-through terminal block 40.

In the FIG. 1 shown in a perspective view electrical wall feed-through terminal 1 is shown here with an inserted test and / or separator 5, which can also be designed as a shorting plug.

The electrical wall feed-through terminal 1 has a housing 2, which consists of an insulating material and provides the necessary protection and a Berührsicherung for the conductor terminals.

In FIG. 1 a wall feed-through terminal block with a terminal block 31 is shown, which has a plurality of terminal blocks 30. Each terminal 1 of the terminal block 31 here has a first conductor terminal 6 and a second conductor terminal 8, which are connected to each other in the ground state 14 via the contact means 3 electrically conductive.

In the in FIG. 1 illustrated first plug-in state 26, the first conductor terminal 6 is electrically isolated from the second conductor terminal 8, since the test and / or disconnect plug 5 is inserted into the plug-in zone 4. Depending on the design of the test and / or disconnect plug 5, it is possible that also in the in FIG. 1 shown first plug-in state 26 via the test and / or separator 5, an electrically conductive connection between the first conductor terminal 6 and the second conductor terminal 8 is produced. In any case, however, the direct electrically conductive connection to the contact device 3 is canceled by the insertion of the test and / or disconnect plug 5.

At the test and / or disconnect plug 5 test connections may be provided, the number per test and / or separator 5 may vary depending on the current requirements.

The electrical wall feed-through terminal 1 is mounted on a wall 24, for example, a control cabinet. This makes it possible, both from the side 10 and from the side 11 of the housing 2 of the wall feed-through terminal 1 to lead a test and / or separator 5 in the plug-in zone 4.

In the illustrated embodiment, the wall bushing clamp 1 practically a common insertion zone 4, which is effective for the insertion of the test and / or disconnect plug 5 from both sides 10 and 11 from. The insertion openings 12 and 13 can also be considered as separate Einsteckzonen which are both provided with the reference numeral 4 for the sake of simplicity.

The first conductor connection 6 and the second conductor connection 8 and the insertion opening 12 are preferably accessible from one side of the wall 24 and in particular from one side 10 of the housing, while the insertion opening 13 is accessible from the other side 11. Preferably, the conductor terminals 6 and 8 and the insertion opening 12 are accessible from approximately one direction, which is aligned opposite to the insertion opening 13.

The plug-in zone 4 is accessible from both sides of the housing, while the lead terminals 6 and 8 are accessible only from one side.

In FIG. 2 is shown in an enlarged and highly schematic cross-section of an electrical wall feed-through terminal 1, wherein only in the second conductor terminal 8, a conductor 25 is inserted. In normal operation, a corresponding conductor 25 is also introduced into the first conductor connection 6.

The first conductor connection 6 is connected to the first contact unit 7 of the contact device 3 via a current bar 15, while the second conductor connection 8 is connected to the second contact unit 9 via a current bar 16. It is also possible that a current bar or both current bars are each an integral part of the respective contact unit.

In FIG. 3 the first contact unit 7 and the second contact unit 9 are shown in an exploded view, wherein the distance between the two contact units 7 and 9 has been increased so far that the contact legs 19 and 20 of the first contact unit 7 and the second contact unit 9 no longer touch, but are shown spaced from each other. In addition, the two contact units 7 and 9 were zoomed in order to explain the function better.

When assembled, the contact units 7 and 9 are arranged as shown in FIG FIG. 2 is shown and the contact legs 19 are in contact with each other at the first contact section 17 and the contact legs 20 touch each other at the second contact section 18. The contact point 17a of the contact unit 7 and the contact point 17b contact each other at the first contact section 17. At the spaced apart second contact portion 18, the contact point 18 a of the contact unit 7 and the contact point 18 b touch, so that there is a redundant electrically conductive connection.

Both the first contact unit 7 and the second contact unit 9 are formed here as a loop 21 and have an elongated approximately C-shaped form whose length is more than twice as large as the width here. At the ends of the "C's", the contact portions 17 and 18 are provided, which are axially spaced apart as seen in the two insertion directions. Both contact units 7 and 9 can be identical and arranged mirror-symmetrically.

The first contact portion 17 may also be referred to as a rear or inner and the second contact portion 17 may be referred to as a front or outer contact portion, when the page 10 is disposed within a cabinet or distribution box and the side 11 facing outward.

At the in FIG. 2 illustrated basic state 14, in which no test and / or separator plug 5 is inserted into the plug-in zone 4, the first and second contact units 7 and 9 touch at both contact portions 17 and 18. This results in that when inserting a test and / or disconnect plug 5 from the first side 10 or from the second side 11 in the first insertion opening 12 or the second insertion opening 13 each first a contact portion 17 or 18 is contacted. Subsequently, the electrical contact is removed at this contact portion, while at the respective other contact portion of the electrically conductive contact is still maintained until the test and / or disconnect plug has been pushed so far that the contact at the first and second contact portion 17 and 18 is lifted. This function is independent of whether a test and / or disconnect plug 5 is inserted into the first insertion opening 12 or the second insertion opening 13. When inserting a test plug in the plug-in zone 4, the plug is first contacted securely and only then the direct electrical connection of the first conductor terminal 6 is lifted with the second conductor terminal 8.

It is also possible that more than two insertion openings 12 and 13 are provided, in which when inserting a test and / or disconnect plug first reliable contact with the test and / or separator 5 is made before the Contact at the other insertion openings is lifted.

FIG. 4 shows a cross section through an electrical wall feed-through terminal 1, which is mounted on a wall 24, for example, a junction box, a junction box or a control cabinet. The electrical wall feed-through terminal is accessible from both sides 22 and 23 of the wall 24. Thus, from the first side 10 or from the second side 11, a test and / or separating plug 5 can be inserted into the insertion opening 12 or 13 in order to carry out a test or maintenance.

In FIG. 4 the first plug-in state 26 is shown, in which the test and / or separating plug 5 was introduced from the second side 11.

In FIG. 5 the second plug-in state 27 is shown, in which the test and / or disconnect plug 5 is inserted from the first side 10 FIG. 5 illustrated the state in which the contact tip 29 of the test and / or separator 5 contacts the first contact portion 17 of the contactor 3, before the electrically conductive connection is released.

FIG. 6 shows a highly schematic plan view of a manifold or junction box shown cut. Here, the rectangular area shown hatched represents a control cabinet 39. In the control cabinet 39, two doors 37 are provided, one of which is open, so that the uncut door opening can be seen.

The doors 37 are part of the walls 24 surrounding the interior. In each door 37 a wall feed-through terminal 1 is provided here. In addition, 24 wall feed-through terminals 1 are arranged in two other walls. When the control cabinet is closed, test and / or isolating plugs 5 can be introduced into the plug-in zone 4 from the outside via the insertion direction 35 from the outside, in order, for example, to open the plug-in zone 4. Check the condition of the system and the terminals.

The persons shown by solid lines 32 and 34 can directly insert separating and / or test plug in the respective wall feed-through terminal 1 from the outside. They do not have to leave their location.

The person 33 need not leave their location and go to the location of the person 34 to insert the disconnect and / or test plug in the wall feed-through terminal 1. The person 33 shown with a dashed line can also insert the separating and / or test plug directly on the open door 37 from the inside into the wall feed-through terminal 1 in the direction of insertion 36. This allows a much more flexible handling.

For example, while the door 37 is open during assembly, commissioning or more intensive maintenance and in particular a running as a disconnect and test plug test and / or disconnect plug 5 can be inserted from the inside in the wall feed-through terminal 1, it is a person with closed cabinet door allows to insert the disconnect and test plug from the outside, without it being necessary to first open the control cabinet.

Overall, the invention provides a wall feed-through terminal 1 with the possibility of connecting a test and / or disconnect plug 5, wherein the test and / or disconnect plug 5 can be inserted from at least two sides into the housing 2 of the electrical connection terminal 1. Here, a high level of security with a simple operation is possible.

The invention provides an electrical connection terminal, which can be used in particular as a terminal block 30 or as a wall feed-through terminal block 40. The connection terminal 1 can be installed in a control cabinet wall and thus offers a barrier-external test plug-in zone, e.g. for control measurements and an in-cabinet test plug-in zone e.g. for commissioning tests or a wiring test available.

To allow the mounting of the wall feed-through terminal in a wall section of the control cabinet wall, additional mounting or locking flanges are provided on the housing to clamp the housing 2 to the wall 24 to be fixed or screwed or otherwise secure it.

LIST OF REFERENCE NUMBERS

Electrical wall feed-through terminal

1

casing

2

contactor

3

plug-in zone

4

Test and / or disconnect plug

5

First conductor connection

6

First contact unit

7

Second conductor connection

8th

Second contact unit

9

page

10, 11

insertion

12, 13

ground state

14

current bar

15, 16

contact portions

17, 18

contact legs

19, 20

loop

21

wall side

22, 23

wall

24

ladder

25

First plug state

26

Second plug-in state

27

test connection

28

contact tip

29

terminal

30

Modular terminal block

31

person

32 - 34

Insertion direction from the outside

35

Insertion direction from the inside

36

door

37

doorway

38

switch cabinet

39

Panel feed-through terminal block

40

Claims (9)

1. Electric through-wall terminal (1) which can be mounted to a wall (24), having a housing (2) and a contact device (3), at which at least one plug zone (4) is provided for accommodating at least one test- and/or connection plug (5), and having a first conductor terminal (6) connected with a first contact unit (7) of the contact device (3),
   and having a second conductor terminal (8) connected with a second contact unit (9) of the contact device (3),
   wherein the housing (2) comprises plug-in apertures (12, 13) at least on two sides (10, 11) from each of which at least one test- and/or connection plug (5) can be inserted into the plug zone (4) for contacting the first and second contact units (7, 9), characterized in
   that a test- and/or connection plug (5) can be inserted into the plug-in aperture (12) on one of the sides (10) from one of the wall sides (23) of the wall (24) and into the plug-in aperture (13) on the other of the sides (11) from another of the wall sides (22) of the wall (24).
2. The through-wall terminal according to claim 1, wherein the plug-in apertures (12, 13) are provided at opposite sides (10, 11) of the housing (1).
3. The through-wall terminal (1) according to claim 1 or 2, wherein the first contact unit (7) is connected with the first conductor terminal (6) via a first power bar (15) and wherein the second contact unit (9) is connected with the second conductor terminal (8) via a second power bar (16).
4. The through-wall terminal (1) according to any of the preceding claims, wherein at least one contact unit (7, 9) comprises a pair of spaced apart first and second contact portions (17, 18).
5. The through-wall terminal (1) according to any of the preceding claims wherein in normal state (14) the first and second contact units (7, 9) are in electrically conducting contact at the first and second contact portions (17, 18).
6. The through-wall terminal (1) according to any of the preceding claims wherein at least one contact unit (7, 9) consists of a resilient material at least in part.
7. The through-wall terminal (1) according to any of the preceding claims wherein at least one contact unit (7, 9) comprises at least one contact leg (19, 20) that is in particular formed as an elongated loop (21).
8. The through-wall terminal (1) according to any of the preceding claims which is configured as a series terminal (30).
9. The through-wall terminal (1) according to any of the preceding claims which is configured as a through-wall terminal block (40).

Images