EP2756554B1 - Electrical series terminal and series terminal block - Google Patents

Description

The invention relates to an electrical terminal block, in particular for connecting a current transformer, with a terminal housing, with at least two conductor connection elements arranged therein and with at least two current bars, the current bars each having a terminal portion and a first contact portion, wherein the terminal portions are each associated with a conductor terminal element and the first contact portions together form a resilient contact area for receiving the plug of a test or operating plug, wherein the first contact portions are spaced apart and are electrically connected to each other only when the plug is plugged in via the plug. In addition, the invention also relates to a terminal block consisting of at least two juxtaposed electrical terminal blocks and at least one jumper, which has at least two legs.

Electrical terminal blocks have been known for decades and are used millions of times in the wiring of electrical systems and equipment. The terminals are often snapped onto mounting rails, which in turn can be arranged in a plurality in a control cabinet. In addition, however, the terminal blocks can also be fastened alone or as a rule to a plurality of terminal blocks in a wall opening, in particular in an opening in a control cabinet wall. This has the advantage that one side of the terminals, the operator side, is accessible from outside the control cabinet without the control cabinet having to be opened and only the other side of the terminal, the connection side, is accessible only when the control cabinet is open.

As conductor connection elements predominantly screw terminals or tension spring terminals are used in terminal blocks. The clamping principle with tension spring clamps is similar to that of screwdriving technology. While with the screw terminal a tension sleeve pulls the conductor against the current bar by the operation of the clamping screw, this task is taken over by the tension spring at the tension spring clamp. In addition, however, cutting terminals or leg spring terminals can be used.

Electrical terminals are usually connection terminals, so that they have at least two conductor connection elements which are electrically connected to one another via an electrically conductive connection rail, the current bar. In addition to this basic type of terminal blocks, which is often referred to as a feed-through terminal, there are a variety of different types of terminal blocks, which are specially adapted to the respective applications (see. Phoenix Contact Catalog Terminal Blocks CLIPLINE 2011, Pages 2 - 11 ). As an example, protective conductor terminals, knife disconnect terminals and installation terminals may be mentioned here.

In switching, measuring and control technology, through-type terminals with isolation capability are the standard. The separation option realized with the electrical terminal block, d. H. the separation point provided in the current bar makes it possible to insert different plugs with different functions into the terminal housing of the terminal block, which then contact the current bar at the separation point. In addition to simple isolating plugs or through connectors, test plugs which can have special components and make it possible to check the proper functioning of the circuit connected to the terminal block can be used in particular as plugs. Since the electrical terminal blocks are generally disc-shaped, they are usually plugged together with several other electrical terminal blocks to a terminal block. In such a terminal block then a number of terminal blocks corresponding number of test plugs can be inserted.

From the DE 10 2005 025 108 B3 a device for testing a protection, measuring or counting device, for example a network protection relay of a high or medium voltage system is known, which can be connected to the electrical device Polleiste with several successively arranged pole openings and a connector block with a number of pole openings corresponding number of Polzungen having. A single Polleistenmodul the Polleiste consists of a housing in which two contact sockets for connecting the lines and connected to the contact bushes spring-loaded contact tabs are arranged. The two contact tabs can be contacted by the Polzunge a plug, the Polzunge the plug has two pole webs, which are separated by a Isoliersteg. The insulating web forms, together with the corresponding pole opening in Polpakmodul a coding that ensures that only a plug with a specific Polzunge in a specific pole opening of a Polleiste is inserted.

In the non-plugged state of the plug or the Polzunge in the Polleiste contact the two contact tabs each other, so that the two contact sockets are electrically connected to each other and can flow through a connected terminal block a current. If the plug with its Polzunge completely inserted into the Polöffnung, the two contact tabs are electrically isolated from each other and the flow of current is stirred via the plug, so that a test procedure can be performed.

From the DE 10 2006 052 894 A1 are a terminal, a test plug and one of a plurality of juxtaposed terminal blocks and a corresponding number of test plugs existing Prüfklemmblock known, the individual terminal blocks and the individual test plugs from the basic principle similar to those from DE 10 2005 025 108 B3 known Polleistenmodulen and Polsteckern are.

From the DE 119 7152 is a terminal according to the preamble of claim 1 is known.

In order to ensure safe and defined contact states when plugging the test plug into the test opening, the current bars are formed in this known electrical terminal block so that they form two contact areas, which are arranged one behind the other in the insertion direction of the contact plug of a test plug. By forming a defined second contact region which is arranged in the insertion direction of the contact plug in front of the first contact region, it is ensured that when inserting the contact plug initially comes to a secure electrical connection between the contact plug and the two current bars, before the first contact area at the other Insertion of the contact plug is opened, whereby the two current bars are then electrically separated from each other.

The previously described, known terminal blocks or Prüfklemmblöcken is common that the two current bars contact each other, so that the conductor connection elements are electrically conductively connected to each other when no plug is inserted into the terminal block. If, however, a plug (completely) inserted into the terminal, the contact area is separated, so that the conductor connection elements are electrically separated from each other.

In addition to these terminal blocks or Prüfklemmblöcken test separation blocks are known from practice, especially those of the Russian company Cheaz, in which the resilient contact portions of the current bar, which together form a resilient contact area, beabstadet from each other and are only electrically connected to each other, if a Plug of a service or test plug is plugged into the contact area. The electrically conductive connection between the contact sections or between the current bars takes place via the inserted plug, which has for this purpose two interconnected contact portions which contact the contact portions of the current bar when the plug is inserted.

In such Prüftrennblöcken, which are particularly common in Eastern Europe and Russia, the mutually associated conductor connection elements are thus only electrically connected to each other when a corresponding operating plug is plugged into the terminal block or in the terminal block. Such terminal blocks or terminal blocks are used in particular for the connection of current transformers. An important feature is that the current transformers are short-circuited as soon as the test or operating plug is pulled out of the terminal block or terminal block.

For this purpose, insertion bridges are provided in the known Prüftrennblöcken over which at least two adjacent current bars are electrically connected to each other, so that the associated conductor connection elements are short-circuited. As a result, the current transformers connected to the conductor connection elements are then also short-circuited. The insertion bridges are arranged in such a way between the opposing contact portions of the current bar, that they contact a contact portion of a current bar when no plug is inserted. If a test or operating plug is inserted in the electrical terminal block or in a test terminal block plugged in, the opposing contact sections of two current bars are slightly pushed apart. This initially leads to the contact sections being connected to one another via the electrically conductive plug. In addition, however, the insertion of the plug into the contact area also causes the connection between the contact portion and a leg of the insertion bridge is interrupted, since the resilient contact portion is pushed away by the insertion of the plug from the rigidly arranged insertion bridge.

In the test clamp blocks known from the prior art, an electrically conductive connection between adjacent contact sections or current bars is thus ensured by the insertion bridges. This cross-bridging is automatically interrupted when a test or operating plug is inserted, at the same time the mutually associated contact portions are electrically connected to one another via the plug.

Although such test blocks have been proven in practice for decades, they also have some disadvantages. These consist in particular in the fact that the construction and assembly of the Prüftrennblöcke is relatively cumbersome. In particular, the mounting of the insertion bridges at the bottom of the housing of the Prüfklemmenblocks is relatively cumbersome, since this the spring contact areas must be deflected against their spring force. At the same time, the insertion bridge must be fastened to the bottom of the housing with a screw, whereby it must be ensured that the contact sections contacted by the insertion bridge are deflected equally far, so that an equally good contact between the insertion bridge and the contact sections is guaranteed later. Finally, there is a risk that twist the only held by a threaded rod resilient current bar during assembly of the insertion bridges, which may also adversely affect the electrical contact between the contact portion and the insertion bridge.

The present invention is therefore an object of the invention to provide an electrical terminal or a terminal block consisting of a plurality of terminal blocks described above, at the problems described above are largely avoided, so that in a simple and reliable manner a switchable cross-bridging to an adjacent electrical terminal block can be realized.

This object is achieved in the electrical terminal described above with the features of claim 1, characterized in that the current bars each have a second contact portion, and that two more current bar pieces are arranged in the terminal housing, wherein in at least one Strombalkenstück at least one recess for inserting a leg of a Jumper is formed. According to the invention, a respective current bar piece is assigned to a current bar such that the second contact portion of a current bar is electrically conductively connected to the associated current bar piece when the plug is not plugged in, while the second contact portion of a current bar is spaced from the associated current bar piece when the plug is inserted ,

Instead of using the insertion bridges used in the prior art, in the electrical terminal block according to the invention a transverse bridging to an adjacent terminal block take place in that in each case a leg of a jumper is inserted into the recess provided in the respective Strombalkenstücken two terminals. The electrical cross connection between two conductor connection elements of two terminal blocks takes place via the respective current bars, the current bar pieces and the inserted jumper. The current bars of the terminal block are in each case electrically conductively connected on the one hand with its connection section to the conductor connection element and on the other hand with its second contact section with the respective current balance element. The electrical connection between the second contact portion of a current bar and the associated current bar piece is based on the spring force of the current bar, which presses the second contact portion against the Strombalkenstück.

Of course, can be done in this way, a transverse bridging of more than two adjacent terminal blocks, including the jumper used must have only a corresponding number of legs. Thus, one of a plurality of terminal blocks according to the invention existing terminal block has the further advantage that the modular terminal block is modular, so that the number of terminal blocks and thus the number of poles of the terminal block is freely selectable. In contrast, the test separation blocks known from practice are only available in predefined sizes - 4- or 6-pole.

If the plug of a test or operating plug is plugged into the resilient contact region between the first contact sections of the current bars, this initially leads to the contact sections and thus also the current bars being electrically conductively connected to one another via the plug. Not only are the first contact portions of the current bars further pressed apart, but also the second contact portion of the current bar is moved away from the associated current bar piece, so that the second contact portion is spaced from the current bar piece and thus the electrically conductive connection is interrupted.

According to an advantageous embodiment of the terminal block according to the invention, the current bars also each have a recess for inserting a plug, in particular a test plug, or a leg of a jumper. This makes it possible to insert corresponding plugs into both the current bar sections and into the current bars, wherein a transverse bridging of adjacent terminal blocks can then also be realized by inserting the legs of a jumper into the recesses in the associated current bars of adjacent terminal blocks.

The realization of the two current bars can be done by punching and then bending each of an elongated metal strip. Preferably, however, it is provided that the two current bars each consist of two individual elongated metal strips, which are electrically conductively connected to each other, in particular welded together, soldered or riveted. The connection section of a current bar is formed by the first metal strip, while the first contact section and the second contact section are formed by the second metal strip. On the one hand this simplifies the production of the current bar, on the other hand it creates the possibility for the connection section on the one hand and the two contact sections on the other hand to use different materials or different cross-sections, which are selected according to the respective required stiffness and spring property. The first metal strip forming the connection section can be relatively rigid, while the second metal strip itself is designed as a contact spring, so that a good contact between the first contact section and an inserted plug as well as between the second contact section and the associated current bar section is ensured.

In the terminal block described above, consisting of at least two juxtaposed electrical terminals and at least one jumper having at least two legs, the object underlying the invention is achieved in that in at least one Strombalkenstück the first terminal and in the corresponding Strombalkenstück the second Terminal block one leg of a jumper is inserted. As a result, two conductor connection elements of the juxtaposed electrical terminal blocks are then electrically conductively connected to each other when no plug of an operating plug is inserted in the two terminal blocks.

As has been previously described in connection with the terminal block according to the invention, the switchable over the operating plug cross-bridge - when not plugged in - via the current bar, the current bar piece and plugged into the two adjacent Strombalkenstücke jumper. If the plug of an operating plug is plugged into the terminal block, as described above, this leads to the fact that the second contact portion of a current bar is removed from the associated Strombalkenstück, whereby the transverse bridging is interrupted.

The electrical terminal blocks, which together form the terminal block, are each disc-shaped. Thus, several terminal blocks together can form a terminal block, the individual terminal blocks are mechanically connected to each other, including the terminal blocks are snapped together via formed in the terminal housing corresponding locking elements. The locking elements preferably consist of on the one side of the terminal housing arranged locking pin and in the other side of the terminal housing formed corresponding recesses,

Fig. 1

eine erfindungsgemäße Reihenklemme, von der Seite,

Fig. 2

die Reihenklemme gemäß Fig. 1, mit eingestecktem Betriebsstecker,

Fig. 3

eine perspektivische Darstellung eines erfindungsgemäßen Reihenklemmenblock, mit einer Mehrzahl von Reihenklemmen, schräg von der Bedienerseite,

Fig. 4

der Reihenklemmenblock gemäß Fig. 3, von der Bedienerseite,

Fig. 5

einen Schnitt durch den Reihenklemmenblock gemäß Fig. 4,

Fig. 6

eine perspektivische Darstellung des Reihenklemmenblock gemäß Fig. 3, schräg von der Anschlussseite,

Fig. 7

der Reihenklemmenblock gemäß Fig. 6, von der Anschlussseite,

Fig. 8

ein Schnitt durch den Prüfklemmenblock gemäß Fig. 7,

Fig. 9

zwei vergrößerte Darstellungen eines Details der Reihenklemme gemäß Fig. 1 und Fig. 2, und

Fig. 10

einen Prüftrennblock, bestehend aus einem erfindungsgemäßen Reihenklemmenblock und einem Betriebssteckerblock, im noch nicht zusammengesteckten Zustand.

In particular, there are now a variety of ways to design and further develop the electrical terminal block according to the invention and the terminal block according to the invention. Reference is made to both the patent claims 1 and 7 subordinate claims as well as to the following description of a preferred embodiment in conjunction with the drawings. In the drawing show

Fig. 1

a terminal block according to the invention, from the side,

Fig. 2

the terminal block according to Fig. 1 , with plugged in operating plug,

Fig. 3

a perspective view of a terminal block according to the invention, with a plurality of terminal blocks, obliquely from the operator side,

Fig. 4

the terminal block according to Fig. 3 , from the operator side,

Fig. 5

a section through the terminal block block according to Fig. 4 .

Fig. 6

a perspective view of the terminal block according to Fig. 3 , diagonally from the connection side,

Fig. 7

the terminal block according to Fig. 6 , from the connection side,

Fig. 8

a section through the test terminal block according to Fig. 7 .

Fig. 9

two enlarged views of a detail of the terminal according to Fig. 1 and Fig. 2 , and

Fig. 10

a Prüftrennblock consisting of a terminal block according to the invention and an operating plug block, not yet mated condition.

The FIGS. 1 and 2 each show an electrical terminal 1, while in the FIGS. 3 to 8 in each case one of several terminal blocks 1 existing terminal block is shown. In Fig. 9 two enlarged views of a section of the terminal block 1 according to the invention are shown in two different connection situations.

The electrical terminal 1 has a terminal housing 2 that is fixed in the illustrated embodiments in an opening of a wall 3, wherein it may be in the wall 3 in particular a control cabinet wall or cabinet door. Inside the terminal housing 2, two conductor connection elements 4, 5 are arranged, wherein the illustrated conductor connection elements 4, 5 are screw terminals. However, other types of connection elements, such as tension spring terminals, insulation displacement terminals or leg spring terminals, can equally well be used as conductor connection elements.

In addition to the conductor connection elements 4, 5, two identically formed and symmetrically arranged current bars 6, 7 are arranged in the terminal housing 2. The current bars 6, 7 each have at their one end a connection section 8, 8 ', which is assigned to one of the two conductor connection elements 4, 5, i. inserted into the screw terminal. In addition, the two current bars 6, 7 each have a first contact portion 9, 9 ', wherein the two contact portions 9, 9' together form a resilient contact region 10 for receiving the plug 11 of an operating plug 12. In addition, the two current bars 6, 7 at their second end in each case a second contact portion 13, 13 ', wherein the two second contact portions 13, 13' respectively for contacting a further, shorter Strombalkenstücks 14, 15 are used.

The second contact portions 13, 13 'are due only to the spring force of the current bars 6, 7 on the Strombalkenstücken 14, 15, wherein the corresponding contact surfaces and the spring force are sufficient to a good current transition between the current bar 6, 7 and the Strombalkenstücken fourteenth To ensure 15. The only resilient installation of the second contact portions 13, 13 'on the Strombalkenstücken 14, 15 allows this conductive connection can be easily separated. While the second contact portions 13, 13 'then, when no plug 11 of an operating plug 12 is inserted into the terminal 1, to the current bar pieces 14, 15 abut ( Fig. 1 ), the second contact portions 13, 13 'are spaced from the current bar pieces 14, 15 when a plug 11 is inserted into the resilient contact region 10 between the current bars 6, 7 ( Fig. 2 ).

Like from the Fig. 1 and 2 it can be seen, the first contact portions 9, 9 'respectively between the connection portion 8, 8' and the second contact portion 13, 13 'of a current bar 6, 7 are arranged. At one end region of a current bar 6, 7 there is thus the connection section 8, 8 'assigned to the conductor connection element 4, 5, while the other end region of the current bar 6, 7 is designed as a second contact section 13, 13' which is connected to the associated current bar section 14, 15 interacts. As a result, upon insertion of a plug 11, a sufficiently large deflection of the second contact portions 13, 13 'of the current bars 6, 7 is achieved, so that a secure separation of the connection between the contact portions 13, 13' and the associated Strombalkenstücken 14, 15 is ensured.

About the arranged in the terminal housing 2 short Strombalkstückestücke 14, 15 is in a simple manner a transverse bridge with an adjacent terminal 1 'produced when in the formed in the Strombalkenstücken 14, 15 recesses 16 of two adjacent terminal blocks 1, 1' each have a leg 17 a jumper 18 is inserted, as this is especially Fig. 5 is apparent. The transverse bridging between two terminal blocks 1, 1 ', which can thus be easily produced by inserting a conventional jumper 18, is then automatically interrupted when the plug 11 of a test or operating plug 12 is plugged into a terminal 1, 1'. The insertion of a plug 11 into the contact region 10 between the first contact sections 9, 9 'of two current bars 6, 7 of a terminal block 1 not only leads to the fact that the two contact sections 9, 9' - and thus the two current bars 6, 6 '- be electrically connected to each other via the plug 11, but also to the fact that the second contact portion 13, 13 'from the associated Strombalkenstück 14, 15 is lifted, as can be seen from a comparison of Fig. 9a and 9b is apparent.

From the Fig. 3 to 5 It can be seen that in the terminal housing 2 in the center an opening 19 for insertion of the plug 11 of an operating plug 12 in the resilient contact region 10 between the first contact portions 9, 9 'of the two current bars 6, 7 is formed. In addition, a further opening 20 for insertion of the leg 17 of a jumper 18 in the recess 16 in the current bar piece 14, 15 is formed on both sides of this opening. The openings 19, 20 are all accessible from the first side 21, the operator side, the terminal 1 from. This results in the advantage that in an arrangement of the terminal blocks 1 and a corresponding terminal block in an opening in a wall 3 of a cabinet both a test or operating plug 12 and a jumper 18 in the terminal blocks 1, 1 'can be inserted without the control cabinet door having to be opened.

Out Fig. 8 It can be seen that the current bars 6, 7 in the region of their connection sections 8, 8 'each have a recess 22 for inserting a leg 17 of a jumper 18 or a test plug 23. For this purpose, corresponding openings 24 are formed in the terminal housing 2, which are accessible from the second side 25, the terminal side of the terminal block 1, from. The recesses 16 in the Strombalkenstücken 14, 15 and the recesses 22 in the current bar 6, 7 are designed so that they are suitable for receiving conventional jumpers 18 or test plug 23 and test adapter. Out Fig. 3 It can be seen that in the recesses 16 and the openings 20 of individual terminal blocks 1 either jumpers 18 or test plug 23 can be inserted.

In the embodiment of the electrical terminal 1 shown in the figures, the two current bars, 6, 7 each consist of two individual elongated metal strips 26, 27, which are soldered, welded or riveted together in the transition region. The two connection sections 8, 8 'are formed by a first, angled metal strip 26, while the first contact section 9, 9' and the second contact section 13, 13 'are both formed on the second metal strip 27. While the first metal strip 26 is relatively rigid, the second metal strip 27 is designed as a contact spring which ensures the spring force required for the first contact section 9, 9 'and the second contact section 13, 13'. By the use of different materials for the two metal strips 26, 27 and in particular in that the two metal strips 26, 27 have different cross sections, the two metal strips 26, 27 different spring properties, so that the current bar 6, 7 optimally to the different requirements in Connection section 8, 8 'on the one hand and in the contact areas on the other hand can be adjusted.

The in the Fig. 3 to 8 shown terminal blocks consists of a plurality of interconnected terminal blocks 1 of which, if necessary, two - or more - adjacent terminal blocks 1, 1 'via a jumper 18 are electrically connected to each other, if in the two terminal blocks 1, 1' no plug 11 is inserted , The individual terminal blocks 1, 1 'are locked together, for which purpose on each side of the terminal housing 2 a plurality of latching pins 28 and on the opposite side of the terminal housing 2 corresponding recesses 29 are formed.

The Fig. 10 shows a Prüfentrennblock consisting of a plurality of interconnected to a terminal block terminal blocks 1 and a corresponding number of mated to an operating plug block operating plugs 12, wherein the operating plug block is not yet plugged into the terminal block. On both sides of the operating plug block, a respective fastening element 30 is arranged, wherein the two fastening elements 30 are connected to each other for easy handling of the assembled from the individual operating plugs 12 operating plug block via a handle 31. In order to prevent a faulty insertion of the operating plug block in the terminal block, a coding between the operating plug block and the terminal block or between the individual operating plugs and the individual terminal blocks is provided.

Claims (9)

1. An electrical modular terminal, especially for connection of a current transformer, with a terminal housing (2), with at least two conductor connector elements (4, 5) located in the latter, and with at least two current bars (6, 7), the current bars (6, 7) each having one connector section (8, 8') and one first contact section (9, 9'), the connector sections (8, 8') being assigned to one conductor connector element (4, 5) at a time and the first contact sections (9, 9') together forming an elastic contact zone (10) for accommodating the plug (11) of a power plug (12), the first contact sections (9, 9') being spaced apart from one another and only with the plug (11) inserted being connected to one another in an electrically conductive manner via the plug (11), wherein the current bars (6,7) having a second contact section each (13, 13'),
   characterized in
   that there are two other current bar pieces (14, 15) in the terminal housing (2), that in at last one current bar piece (14, 15) at least one recess (16) being formed for inserting a leg (17) of a plug-in jumper (18),
   wherein one current bar piece (14, 15) at a time is assigned to one current bar (6, 7) such that the second contact section (13, 13') of a current bar (6, 7) is connected in an electrically conductive manner to the assigned current bar piece (14, 15) when the plug (11) is not plugged in, while the second contact section (13, 13') of a current bar (6, 7) is spaced apart from the assigned current bar piece (14, 15) when the plug (11) has been plugged in.
2. Electrical modular terminal according to claim 1, characterized in that the first contact sections (9, 9') are each located between the connector section (8, 8') and the second contact section (13, 13') of a current bar (6, 7).
3. Electrical modular terminal according to claim 2, characterized in that in the terminal housing (2), one opening (19) is made for inserting the plug (11) of a power plug (12) into the elastic contact zone (10) and at least one opening (10) is made for inserting the leg (17) of a plug-in jumper (18) into the recess (6) in the current bar piece (14, 15), the two openings (19, 20) being accessible from a first side (21), the operator side.
4. Electrical modular terminal according to claim 2 or 3, characterized in that the current bars (6, 7) each have at least one recess (22) for inserting a plug, especially a test plug (23), or one leg (17) of a plug-in jumper (18) and wherein corresponding openings (24) are made in the terminal housing (2), the openings (24) being accessible preferably from a second side (25), the connector side.
5. Electrical modular terminal according to any one of claims 1 to 4, characterized in that the two current bars (6, 7) each consist of two individual elongated metal strips (26, 27) that are connected to one another in an electrically conductive manner, especially are welded, soldered or riveted to one another, the two connector sections (8, 8') each being formed by a first metal strip (26) and the first contact section (9, 9') and the second contact section (13, 13') each being formed by a second metal strip (27).
6. Electrical modular terminal according to claim 5, characterized in that the two metal strips (26, 27) of the two current bars (6, 7) each consist of different material, especially of material with different stiffness and different spring properties, and/or different cross sections.
7. A modular terminal block consisting of at least two electrical modular terminals (1, 1') located next to one another according to any one of claims 1 to 6, and of at least one plug-in jumper (18) having at least two legs (17),
   characterized in
   that one leg (17) of a plug-in jumper (18) at a time is plugged in at least one current bar piece (13, 14) of the first modular terminal (1) and in the corresponding current bar piece (13, 14) of the second modular terminal (1') so that two conductor connector elements (4, 5) of the electrical modular terminals (1, 1') located next to one another are connected to one another in an electrically conductive manner when the plug (11) of a power plug (12) has not been inserted in the two modular terminals (1,1').
8. Modular terminal block according to claim 7, characterized in that the modular terminals (1, 1') are mechanically connected to one another via a corresponding catch element made in the terminal housing (2), especially via a latch pin (28) located on one side of the terminal housing (2) and corresponding latch recesses (29) made in the other side of the terminal housing (2).
9. Modular terminal block according to claim 7 or 8, characterized in that one plug (11) of a power plug (12) is plugged into the contact zone (10) of the individual modular terminals (1, 1') at a time so that the first contact sections (9, 9') of the modular terminals (1,1') are each connected to one another in an electrically conductive manner via the plug (11) that has been plugged into the respective modular terminal (1).

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