ES2357253T3 - SWITCHING SYSTEM OF THE INSTALLATION. - Google Patents

Abstract

Switching device of the installation (1) with a housing (3), with a front front side (4) and a rear front side (5), with a fixing side (6), with narrow front sides (7) and rear (8) and with wide sides (9), and with two connection terminals (10, 10 ') without screw, respectively, with at least one clamping spring (12, 12') for the connection of connection conductors ( 14), in which the clamping springs (12, 12 ') are fixed in position in a space of connection terminals (18) of the housing (3), in which the space of connection terminals (18) is opened towards the wide sides of the housing (9) and towards the front side such that each connection terminal (10, 10 ') is covered by a terminal cover piece (22, 22') associated therewith, the which has a connection surface (24, 24 ') with a number of connection holes (26, 26'), which corresponds to the number of connection conductors (14) to be connected in this way as guide means (28, 28 ') integrally formed in each connection hole (26, 26') for the connection conductors (14), which also has two lateral surfaces (29, 29 '), which covers the connection terminal (10, 10 ') laterally in the direction of the wide sides (9), characterized in that in each terminal cover piece (22, 22') pivotally connected to the housing (3) are integrally formed means for activating the spring (30, 30 ') and are configured such that during articulation of the terminal cover piece (22, 22') against the respective clamping spring (12, 12 '), they drive this one with opening effect.

Description

[0001] The invention relates to an installation switching device with a housing and with two screwless terminal connections, respectively, with at least one clamping spring for the connection of connecting conductors, which is fixed in position in a housing terminal connection space, according to the preamble of claim 1.

[0002] An installation switching device of the type indicated at the beginning comprises within its housing at least one contact place with at least one fixed contact part and with a mobile contact part, through which it can be opened and close a current path that leads from an input terminal to an output terminal. The place of contact is generally activated by a switching mechanism with a hitch. A switching device of the installation of the type indicated at the beginning may further comprise activation devices, for example a thermal activator or a rapid magnetic activator which, when a short-circuit current or fault current appears in the current path act on the place of contact or on the switching mechanism, so that the place of contact is opened.

In many switching devices of the installation of the type indicated at the beginning, in addition to the current conducting pole, the neutral conductor is also connected. In such devices it is necessary then that on the connection side of the terminals two conductors can be connected tightly to each other, but remain electrically isolated from each other at the place of connection of the switching apparatus of the installation.

[0004] For connection with external connection conductors, they are used in switching devices of the installation of the type indicated at the beginning, in addition to threaded terminals, also screwless terminal connections. As clamping elements, plug terminals or traction spring terminals can be used in this case. In principle, these can greatly simplify the connection of connection conductors, but the currently known switching devices of the installation with screwless terminal connections also involve drawbacks.

[0005] Document DE 203 12 861 U1 shows a terminal connection, in which a holding spring for connecting a single conductor is present in a contact frame.

[0006] EP 1 641 079 A1 shows an installation switching device with two terminal connections, in which up to two conductors with a clamping spring can be connected to a contact frame in each connection terminal. To each connection terminal are associated laterally housing walls for the delimitation and an articulation lever, with which the clamping spring can be pressed for the introduction of a connection conductor in the opening direction.

[0007] EP 0 335 093 A2 shows a screwless electrical connection terminal with a housing space in a housing and with a spring sheet for fixing a connection conductor in the connection terminal space, as well as with an activation member, with which the spring sheet can be compressed for introduction and removal of the connecting conductor.

[0008] It is known from EP 1 432 077 A1 an installation switching device of the type indicated at the beginning with two screwless connection terminals, in which the connection terminal space is laterally delimited by the wide sides of the housing and is open towards the narrow side of the housing and is covered with a fixed cover piece corresponding in its width to the width of the housing. The cover piece is elastically embedded in the narrow side of the housing on this housing. The connection terminal according to document EO 1 432 077 can only be activated with a tool for the introduction of flexible conductors as well as for the removal of the conductors outside the connection terminal.

[0009] EP 1 213 791 B1 shows a switching device of the installation with two connecting elements positioned superimposed and displaced transversely of the type of traction spring terminal. Activation of the clamping element is only possible with an external tool.

[0010] Therefore, the task of the present invention is to create an installation switching device of the type indicated at the beginning, in which two screwless connection terminals are associated with each other on one side of the switching device of the installation in a common space connection terminals and connection terminals are connected simply and at a favorable cost, so that the introduction and removal without tools of connection lines is possible.

[0011] The task is solved by means of a switching device of the installation of the type indicated at the beginning with the characteristic features of claim 1. Therefore, according to the invention, the connection terminal space is open towards the wide sides of the housing and towards the front side, and the two connection terminals are displaced adjacent to each other transversely to the wide side and are offset relative to each other in height on the fixing side, and each of the terminals The connection is covered by a terminal cover piece connected in an articulated manner with the housing. Each terminal cover piece has a connection surface with a number of connection holes, corresponding to the number of connection conductors to be connected as well as guide means formed integrally formed in each connection hole for the connection conductors. In addition, each terminal cover piece has two side surfaces which, when the terminal cover piece is placed, cover the connection terminal associated therewith laterally in the direction of the wide sides.

[0012] According to an advantageous embodiment of the invention, in the terminal cover part, spring activation means are integrally formed and configured in such a way that during the articulation of the cover part they are driven by opening them against of the clamping spring.

[0013] Another very advantageous embodiment of the invention provides that the guide means are hollow bodies of the tube type, which form an inlet channel, which at the same time serve as a means of activating the spring for the holding spring .

[0014] Each connection terminal of a switching device of the installation according to the invention comprises very few components, namely essentially only the clamping spring, a busbar with a clamping edge, against which the spring of clamping holds the connecting conductor to be connected, and the terminal cover piece. The switching apparatus of the installation according to the invention comprises two connection terminals of this type, which are arranged adjacent to each other on a connection side of the apparatus. Therefore it can be manufactured very easily and with favorable cost.

[0015] According to an especially advantageous embodiment, the two connection terminals are also offset from each other in height on the fixing side. In this way, the air path and the leakage line between the two connection terminals are prolonged, which additionally ensures the electrical insulation between the two connection terminals.

[0016] The terminal cover part is configured in such a way that it performs several functions in one component:

 The guide means formed integrally in the terminal cover piece in each connection hole are concerned with the conduction of the connection conductor to the clamping spring at the desired insertion angle. Neither the busbar nor the holding spring itself has to provide other guiding means for the conduction of the connecting conductor.

 Several connection conductors are introduced through several connection holes and in this case they are kept separate from each other. In this way, also in the case where several conductor ends have to be connected, an individual introduction of each individual conductor end is possible, without other measures to keep separate ends being necessary on the sides of the holding spring or the busbar. Individual drivers

 Through the spring activation means integrally formed, in accordance with an advantageous embodiment, at the same time in the terminal cover part, the terminal cover part is used at the same time for the opening tool of the clamping spring A separate activation tool, for example a screwdriver, is no longer necessary to open the clamping spring.

[0017] A switching device of the installation according to the invention has, in general, the advantage that two connecting terminals are arranged in a simple manner on one connection side and in a connection terminal space. very comfortably accessible from the outside, so that the two connection terminals are electrically isolated from each other and can be activated without a tool independently of each other. For the insertion as well as for the removal of connection conductors with fixed fixing end and with flexible connection end, no external tool is needed on or outside the connection terminal. The connection terminals can be easily constituted with few prefabricated components.

[0018] According to an advantageous embodiment of the invention, each terminal cover piece is elastically driven by the clamping spring associated therewith against the direction of insertion of the external connection conductor and can be pressed against this clamping spring. In this case, especially advantageously, the terminal cover piece may be driven by the clamping spring associated therewith against a projection of the housing wall, which serves as a stop. In this way, the terminal cover piece is maintained through the elastic drive of the clamping spring associated therewith in a defined starting position. The starting position is in this case the closing position of the clamping spring.

[0019] The terminal cover part can be configured in a particularly simple way and can be manufactured, for example, as an injection molded part of favorable cost.

[0020] For pressure activation of the terminal cover part it can be provided that the terminal cover part has a pressure surface accessible from the outside and which can be activated manually.

[0021] Another advantageous variant of the invention is characterized in that the connection terminal space between the two connection terminals comprises an insulation plate that extends parallel to the wide sides. This avoids a contact and, therefore, an electrical contact between the two connection terminals, for example between the two busbars. In addition, the isolation handle acts with a mechanical stabilization effect.

[0022] In order to guarantee in the operating state, that is to say, after the finished assembly of the switching device of the installation, the access to the connection terminal is sectioned to the voltage tester, the terminal cover piece may have a test hole for an electrical contact of the connection terminal.

[0023] Another advantageous variant of the invention is characterized in that an adjustment hole in the housing wall is made in the vicinity of a terminal cover piece. In this way, it is possible to intervene during manufacturing or in the assembled state of the mounted switching apparatus finished with a tool inside the switching apparatus, to access an adjustment means disposed there in the vicinity of the adjustment hole.

[0024] With respect to the spatial arrangement of the connection surface of the terminal cover piece in relation to the front side of the housing and of the guide means in front of the connection surface, a possible embodiment of the invention it provides that the connection surface of the terminal cover piece extends approximately parallel to the rear front side and the guide means are inclined relative to the connection surface of the terminal cover part. The angle of inclination for the guide means is selected, for example, in such a way that the connecting conductors remain well accessible during the juxtaposition of a switching device of the installation according to the invention in a distribution box, and the Connecting conductors are not bent excessively upwards.

[0025] Another advantageous embodiment provides in this respect that the connection surface of the terminal cover piece is inclined with respect to the rear front side and that the guide channels extend approximately perpendicular to the connection surface. The angle of inclination, under which the connecting conductors are introduced relative to the clamping spring, is determined in this embodiment through the inclination angle of the guide channels.

[0026] Obviously, a combination of the two possibilities shown above would also be conceivable, in which both the connecting surface of the terminal cover piece is inclined with respect to the rear front side and also the guide channels are inclined with respect to to the connection surface.

[0027] To enable, if desired, for example for reasons of redundancy, additionally the activation of the clamping spring through an external tool, in accordance with another embodiment of the switching device of the installation according to the invention , the terminal cover piece may have an intervention opening for an activation tool. Through this intervention opening the clamping spring can be brought with the activation tool, for example with a screwdriver, to its open position.

[0028] According to another very advantageous embodiment, with the free end, directed towards the front side, of a first partial body of each terminal cover piece, a closure piece is articulated, which covers in each In this case, the space of connection terminals on the front side in collaboration with one end of the fixed front side in the housing, so that during activation of the terminal cover piece, the closure piece overlaps, at least partially, with the end of the front side fixed on the housing.

[0029] The respective closure piece and the part of the fixed front side in the housing together form the front side. The respective closure piece acts in this way as a complement to the fixed part in the housing as a part of the front side arranged on the side of the terminal cover piece.

[0030] According to an especially advantageous embodiment, the closure part is configured in the form of a plate. In this case it can be manufactured more advantageously in the same injection molding process as the terminal cover part.

[0031] In particular, an embodiment in which the respective closure piece is coupled by means of a hinge, for example of a film hinge with the respective terminal cover piece, is very advantageous. A film hinge of this type can be manufactured very favorably through injection casting.

[0032] Another very advantageous embodiment of the invention is characterized in that the respective closure piece is guided in a displaceable way parallel to the front side in each case by means of guide pivots that are spaced laterally, in a slide-type guide Fixed in the housing. The respective closure piece is then guided in each case overlapping with the part of the front side of the corresponding housing side and movable. In this way, with the activation of the respective terminal cover part, it can be articulated and moved behind the corresponding housing side part of the rear front side. In this way, a tight cover of the terminal housing space towards the front side is guaranteed with simultaneous mobility of the terminal cover piece and mechanical stability of the rear front side.

[0033] Through the placement of the hinge on the respective closure piece, it can be moved by saving space parallel to the front side in a slide-type guide.

[0034] In addition, another very advantageous development of the invention is characterized in that the respective terminal cover piece then carries a distance surface from the connection surface, which forms in the area of the respective narrow side the closure of the part side of terminal cover of the terminal housing space, so that the closure piece is pivotally coupled at the end of the distance surface that is directed towards the front side. In this way, it is possible to place the connection surface on a part of the wall on the narrow side of the switching apparatus that is closest to the fixing side when this is necessary by virtue of a predetermined arrangement of the connection terminals inside of the switching device near the fixing side.

[0035] According to a particularly advantageous development of this embodiment, the distance surface is made rigid. In this way, a force transmission on the spring of the connection terminal is also possible through the activation of the terminal cover piece on the distance surface. This is advantageous when the sealing surface of the terminal cover piece is only easily accessible to a service person by virtue of the position of the connection terminals very close to the fixing side of the switching device in the mounting position. of the switching apparatus, for example at a plant distributor. The distance surface can therefore be used in an area, which is not covered by a connecting conductor, as a second pressure surface for spring activation.

[0036] In another particularly advantageous embodiment of the invention, the distance surface has an intervention hole for an activation tool. The connection terminal can be activated through the terminal cover piece, therefore, either manually or also by means of a tool.

[0037] In accordance with another very advantageous embodiment of the invention, the respective closure piece is constituted, at least in the area of the coupling with the first partial body, of a material having different mechanical properties than the first partial body of the terminal cover piece.

[0038] Also here the closure piece covers the connection terminal space on the front side in collaboration with an end of the fixed front side in the housing, so that during the activation of the terminal cover piece, the flap closure, at least partially, with the end of the front side fixed on the housing.

[0039] The respective closure piece and the fixed part in the housing thus form the front side together. The respective closure piece acts in this way, as a complement to the fixed part in the housing, as part of the front side on the side of the terminal cover piece.

[0040] In this case, an embodiment is especially advantageous, in which the hinge and the respective closure piece are constituted in the hinge zone of a material having different mechanical properties than the first partial body of the terminal cover.

[0041] Since the respective closure part is constituted at least in the area of the coupling with the first partial body of the respective terminal cover part of a material with mechanical properties other than this one, the spring elastic properties can be established of the respective closure part and its coupling in the first respective partial body independently of the properties of the first respective partial body of the terminal cover part and can be optimized for the purpose of use. This is especially advantageous when other mechanical requirements, sometimes even contradictory, are raised in the first respective partial body of the terminal cover piece than in the closure piece.

[0042] This may be the case when the respective terminal cover piece during an activation, that is, during an articulation towards the inside of the switching apparatus, activates at the same time the corresponding clamping spring in each case with opening effect against its recovery spring force.

[0043] This can be done, for example, by means of spring activation means, integrally formed in the respective terminal cover piece in proper position, which act on the clamping spring in the case of a joint of the part of terminal cover.

[0044] In this case, the first partial body of the respective terminal cover piece must have a high rigidity, so that the force for the opening of the respective clamping spring can be transmitted without deformations of the respective terminal cover piece .

[0045] However, the respective closure piece must be flexible, but at least it must be flexibly coupled to the first partial body of the terminal cover piece, so that it can slide during articulation of the cover piece of terminals saving space in the slider type guides behind the end of the fixed front side in the housing.

[0046] During the articulation of the respective terminal cover part inside the apparatus, the angle between the closing part and the first partial body of the respective terminal cover part will necessarily be modified.

[0047] Since the closure piece must extend as parallel as possible to the end of the fixed front side in the housing. However, the angle between the first partial body of the terminal cover piece and the end of the fixed front side in the housing is modified during articulation of the terminal cover piece. Therefore, on the coupling side a possibility of movement of the closure piece in front of the first partial body of the terminal cover piece is necessary, which can only be achieved through a flexibility of the material in this place.

[0048] According to a particularly advantageous development of the invention, the distance surface is made rigid, and the closure piece is made, at least in the area of the coupling with the distance surface, softer than the distance surface.

[0049] In this way, the two contradictory requirements posed to different partial bodies of the terminal cover piece are met. A single component, the respective terminal cover piece, has sections, different properties of the material. Through the rigid partial zone, a force transmission over the respective spring of the connection terminal is also possible through the activation of the terminal cover piece on the distance surface. The closing part, the second partial zone, can be folded, however, slightly and can be moved parallel to the front and behind the front sides.

[0050] In an especially advantageous embodiment of the invention, the terminal cover part with the closure part coupled therewith is manufactured in a two component injection molding process. In this process, materials with different mechanical properties can be assembled, that is, for example, hard and soft plastics, for injection molding.

[0051] With respect to an advantageous configuration of the connection terminals, each connection terminal of a switching device of the installation according to the invention comprises a clamping spring, which acts as a compression spring on the end of the conductors. , for fixing a conductor end in a counter bearing, in which the connection terminal comprises a busbar with a connection end and a branch area which is then connected. The busbar has a recess of the type of window at the connection end with a support edge and a clamping edge, opposite the support edge, in the transition from the connection end to the branch area. The clamping spring has a support arm, with which it rests on the support edge of the busbar. An opposite piece is connected to the support arm and a clamping arm in it, so that the end of the conductor can be fixed between the clamping arm and the clamping edge as against the bearing. The end of the conductor can be inserted from the side of the arc piece into the recess of the window type.

[0052] According to an advantageous embodiment of the invention, in the respective arc piece a first partial clamping arm is connected, which passes in a bending edge to a second partial clamping arm folded from the first arm of partial clamping, so that the first and the second partial clamping arm form, respectively, an obtuse angle to each other, whose opening points in the direction of insertion of the connecting conductor.

[0053] The obtuse angle between the respective respective partial clamping arm and the respective respective partial clamping arm offers the advantage that the point of attack can be placed in the vicinity of the spring activation means in the vicinity of the edges of the flexion. In this way, the support point of the spring activation means can have a greater distance with respect to the pivot point of the clamping arm in the arc piece, without reducing the maximum opening of the terminals achievable in this way, and without the means for activating the spring being on the road with a connecting conductor with a large cross section. But a greater distance between the fulcrum and the pivot point means a more favorable lever ratio and, therefore, a lower activation force for the user.

[0054] A preferred embodiment is characterized in that the busbar has approximately a U-shape, so that the connecting end forms one of the arms of the U, and the bypass zone is formed by a transverse rib and by the other arm of the U. In this case, at the free end of the other arm of the U a rim may be provided for fixing other current conductors, which lead to the interior of the switching apparatus of the installation.

[0055] According to another embodiment, a branch rail can also be formed integrally at the free end of the other arm of the U. The branch rail can extend approximately perpendicular to the other arm of the U and the side of the connecting end, which is opposite the clamping edge, is supported by the branch rail.

[0056] Another advantage of a switching apparatus of the installation according to the invention is that the bypass area of the busbar can be used for electrical contact during thermal bimetal calibration. In switching devices of the installation known until now, the contact point for the thermal bimetal calibration is arranged elsewhere, outside the access area of the connection terminal and is not accessible through the connection terminal. Since the calibration of the thermal bimetal can only be carried out in the finished assembled state, in the switching devices of the installation, after the calibration, the separated access holes towards the calibration contacts through cover pieces must be covered additional.

[0057] This is not necessary in a switching device of the installation according to the invention. Therefore, in relation to the switching devices of the installation known from the prior art, both assembly parts - namely, additional cover parts - and manufacturing steps during assembly are saved, so that that through the simplification of the resulting assembly, an additional advantage of the switching device of the installation according to the invention is achieved.

[0058] A switching device of the installation according to the invention can be mounted finished, with the exception of the terminal cover parts. Then - by means of electrical contact through the hole of the connection terminal - the term bimetal can be calibrated, using the busbar bypass area as a calibration contact. Once the calibration has been carried out, the terminal cover piece is placed and in this way the installation switching device is terminated. A separate cover piece is no longer necessary for the calibration hole.

[0059] Another advantage is achieved because by virtue of the configuration according to the invention, the connection terminals of a switching device of the installation are made in such a way that they also have, only in the case of very narrow exterior dimensions, only a reduced electrical resistance. This is achieved because the busbar has a uniform width in the branch area between the clamping edge and the place, where another current conductor is fixed, which leads into the installation switching device. In this way, it is possible to construct switching devices of the installation according to the invention in half the width of the standardized module.

[0060] In accordance with DIN 43 880 a division unit ‘to’ is defined for the mounting width of switching devices of the installation. According to this standard, the mounting width is an integral or half-multiple of 17.5 mm, more exactly; a = n x (17.5 mm + 0.5 mm), n = 0.5; 1.5; 1.5M 2.0, ...

[0061] An installation switching device with a standard module half-width has, therefore, a mounting width of 9 mm.

[0062] The busbar has only a single recess of the window type for the accommodation of several connecting conductors. The individual connecting conductors, which are housed in one of the recesses of the busbar, are kept separated from each other through the connection holes and through the guiding means connected with them. In this way, individual insertion and removal of several connecting conductors in a single recess is possible, without influencing each other's individual connecting conductors.

[0063] This is even better possible in another embodiment of the invention, in which the clamping arm of the clamping spring is shaved in the longitudinal direction, so that two partial springs are placed closely adjacent to each other and that they can be attached independently of each other, which are associated, respectively, to a connection hole in the terminal cover piece and, therefore, in each case to a connection conductor to be connected. Since the two partial springs are closely adjacent to each other, that is, without an intermediate space disposed approximately in the center or without presenting an intermediate rib disposed approximately in the center, another contribution is provided to a narrow type of construction of the connection terminal, in which the connection terminal according to the invention can be incorporated into a switching device of the installation having only a half-width of the standardized module.

[0064] In the switching devices of the installation known until now, a separate recess in the busbar is provided at the connection terminals for each connection conductor, which is separated by a central rib. In this way, the connection terminals are prepared so that in the case of mounting two connection terminals in a switching apparatus of the installation of a standardized module width, the two connection terminals overlap at least partially. This hinders the necessary electrical isolation between the two connection terminals according to the state of the art.

[0065] Through the invention it is possible to insert two connecting terminals adjacent to each other in a switching apparatus of the installation of a standardized module width, which are isolated from each other and must not overlap. In this way, an electrical crosstalk between the two connection terminals arranged adjacent to each other is safely avoided.

[0066] Other configurations and advantageous developments of the invention and other advantages can be deduced from the dependent claims.

[0067] With the help of the drawings, in which two embodiments of the invention are represented, the invention is explained and described in detail as well as other advantageous configurations and developments of the invention.

[0068] In this case:

Figure 1 shows a schematic view of a switching device of the installation according to the invention.

Figure 2 shows an enlarged view of the upper connection terminals of the installation switching device according to Figure 1 with terminal cover installed.

Figure 3 shows a schematic view on a connection terminal according to Figure 2, in which the side wall of the terminal cover has been removed.

Figure 4 shows a schematic view of the connection terminal space according to Figure 1, with the terminal covers removed.

Figure 5 shows another embodiment of a switching device of the installation according to the invention with an isolation plate between the two connection terminals.

Figure 6 shows an insulation plate for insertion into a switching device of the installation according to the invention according to Figure 5.

Figure 7 shows a schematic view of the partial section of another embodiment of a switching device of the installation according to the invention, showing only a first lower connection terminal, with a terminal cover piece, in the that a closure piece is coupled by means of a hinge, when the terminal is closed, as well as

Figure 8 shows a schematic partial view of the switching device of the installation according to Figure 7, with the Terminal open in the activation position.

[0069] In the figures, the same or equivalent components or elements are provided with the same reference signs, although they are configured in different embodiments in slightly modified form.

[0070] First, figures 1 to 5 are considered. A switching apparatus of the installation 1 according to the invention, see figure 1, has a housing of insulating material 3, formed by two housing parts 2, 2 'assembled along a separation joint 2a, with a front front side 4, rear front sides 5, 5', a fixing or connecting side 6, narrow front sides 7, 7 ', which connect the side front front 4 with the front front sides 5, 5 ', narrow rear sides 8, 8' as well as two wide sides 9, only one of which is shown in the view according to Figure 1.

[0071] On one of the rear front sides 5 ', in a space of connection terminals disposed within the housing 3 a conventional threaded terminal, accessible through a terminal opening 11, is placed for the connection of connection conductors .

[0072] On the second rear front side 5, opposite the threaded terminal, a connection terminal space 18 is provided, which is open towards the wide sides of the housing 9, towards the narrow rear side 8 and towards the rear front bark 5. In the space of connection terminals 18 two connection terminals 10, 10 'are present, which are arranged adjacent to each other transversely to the wide side 9, and are offset from each other in height above the fixing side 6. By therefore, seen from the fixing side 6, a first connection terminal 10 is arranged on a second connection terminal 10 '. Each of the two connection terminals 10, 10 'is fixed in position in the space of connection terminals 18 and is accessible for connection of connection conductors 14 (see Figure 3). High flexibility is achieved through the opening of the connection terminal space on four sides for the direction of connection of the connection conductors 14.

[0073] Each of the two connection terminals 10, 10 ’is covered by a terminal cover piece 22, 22 ′ associated therewith. This part serves, on the one hand, for the contact protection of the connection terminals that carry current and, on the other hand - as shown below - guarantees a toolless activation of the connection terminals.

[0074] Between the upper edge of the second connection terminal 10 'and the rear front side 5 the cover, which points inwards towards the apparatus, of the connection terminal space 18 is formed by a partial section of the housing wall .

[0075] The terminal cover piece 22, 22 'is essentially in the form of an open box on two sides (see also Figure 2, in which only the upper connection terminal 10 is shown as a fragment of Figure 1) . Two sides of this box are formed by two cover plates that are arranged at an angle to each other, on which two lateral surfaces 29, 29 'are formed on the side, which cover the connection terminal 10, 10' laterally in the direction wide sides 9.

[0076] The first cover plate covers the corresponding connection terminal 10 or 10 'towards the rear front side 5 and has a connection surface 24 or 24', respectively, with two connection holes 26 or 26 ', so that a connection conductor can be connected through each of the connection holes 26, 26 '.

[0077] The second cover plate covers the corresponding Terminal 10 or 10 ’towards the narrow rear side 8 and has a pressure surface 230 or 230 ′ accessible from the outside and which can be activated manually. In the free edge, the second cover plate has a semi-open tube-shaped cavity, with which it is rotatably housed in an articulation pivot 232

or 232 ’which is connected to the narrow rear side 8 of the housing 3.

[0078] Obviously, other types of rotating housing of the terminal cover part in the housing are also conceivable, for example a rotating riveted joint or also an articulated hinge joint.

[0079] Figure 1 shows a switching apparatus of the installation 1 according to the invention with the terminal cover pieces 22, 22 ’. A view on the terminal connection space 18 with removed terminal cover pieces is shown in Figure 4.

[0080] Each of the connection terminals 10 or 10 'is a so-called plug connection terminal, its structure is explained with the help of figure 3, which shows the connection terminal 10 of figure 2, but with the front surface 29 removed from the terminal cover piece 22, and with the aid of Figure 4, in which the arrangement of the two connection terminals 10 or 10 'in the connection terminal space 18 is shown. The reference numbers without apostrophe refer in this case to the upper connection terminal 10, the reference numbers with apostrophe refer to the lower connection terminal 10 '. In the following text, reference numbers without apostrophe are not mentioned due to easier readability, but are represented in the figures. Otherwise, the two connection terminals 10, 10 'are constituted essentially identically.

[0081] The connection terminal 10 comprises a busbar 102 and a clamping spring 12. The connection terminal 10 is located on a projection formed inside the housing 3, which is not shown here in detail which is fixed in position there by means of ribs and pivots, only one of whose pivots 10 is shown here by way of example, in a manner known per se in the space of connection terminals 18.

[0082] The busbar 102 comprises a connection end 112 and a branch area 114 which is connected at said end. At the connecting end 112 it has a single recess 116 in the form of a window with a support edge 118 and with a support edge 120 opposite the support edge. The clamping edge 120 is in the transition of the connecting end 112 in the branch area 114.

[0083] The holding spring 12 has a support arm 212, with which it is supported on the support edge of the bus bar 102. The support can be made such that the support arm 212 has its free end a fold up, with which it partially surrounds the support edge in order to support it.

[0084] On the support arm 212 an arc piece 214 is connected and on it a clamping arm 216. The driving end 16 of a connecting conductor 14 is inserted from the side of the arc piece 214 in the recess. 116 in the form of a window and can be fixed between the clamping arm 216 and the clamping edge 120 which functions as a counter-support. In this case, the free end of the clamping arm 216 passes through the window-shaped recess 116.

[0085] The clamping arm 216 of the clamping spring 12 is shaved in the longitudinal direction along a groove 218, so that two partial springs 13a, 13b result that can be held independently of each other, with which two connection conductors can be fixed independently of each other.

[0086] The busbar 102 has approximately a basic U-shaped shape, in which the connecting end 112 forms the first arm of the U, and the branch area 114 is formed by a transverse rib 220 and the second arm of the U 222. At the free end of the second arm of the U an upward fold 224 is made. In this upward fold 224 other connecting conductors can be placed, with which the connecting terminal 10 is connected with other components inside the switchgear housing, such as trip modules. In particular, the connecting conductors may be welded or tinned in this fold up, a screwed or riveted joint also being possible.

[0087] A depicted configuration of the busbar has the advantage that the forces acting during the insertion and removal of the connecting conductor on the Connection Terminal 10 can be absorbed by it as a closed system and thus can be reduced forces on other elements of the installation switching device, such as the housing.

[0088] The busbar 102 can be manufactured, for example, as a folded piece stamped in very large numbers of parts with favorable cost and in a simple manner and in a wide plurality of shapes.

[0089] Through the pressure on the pressure surface 230, the terminal cover piece 22 can be pivoted around the free edge of the second cover plate in the direction of the holding spring

12. A fall of the cover piece 22 is prevented by means of a projection 234, which serves as a stop, on the housing wall.

[0090] In the first cover plate of the cover piece 22, hollow bodies 28 in the form of a tube are placed, aligned on the holding spring 12, in each of the connection holes 26, forming a channel of entry. These hollow bodies serve at the same time as guiding means for the connecting conductor 14 to be inserted and as spring activating means. When the cover piece 22 is pivoted through the pressure on the pressure surface 230 around the articulation pivot 232 in the direction of the clamping spring 12, then the hollow bodies press the clamping arm 216 of the clamping spring 12 out of the clamping edge 120 of the busbar 102, such that between the clamping edge 120 and the clamping arm 216 a space for the introduction of the end of the connecting conductor 16 is isolated from the connecting conductor 14. Figure 3 shows this state.

[0091] When, after insertion of the end of the connecting conductor, the pressure surface 230 of the cover piece 22 is loosened again, then the clamping arm 216 of the clamping spring 12 presses, by virtue of its spring force through the hollow bodies 28, the cover piece 22 again outwards and at the same time retains the end 16 of the connecting conductor 14 against the clamping edge 120 of the window-shaped recess 116.

[0092] The introduction of connecting conductors with rigid ends of the connecting connectors is obviously also possible without the activation of the terminal cover piece. Since a rigid end of the connecting conductor can bend during the introduction the corresponding partial clamping spring 13a or 13b. However, also in the case of rigid ends of the connecting conductors, an activation of the terminal cover piece is necessary for the removal of the connecting conductor.

[0093] In the embodiment shown, two connection holes 26 are present on the connection surface 24 of the cover piece 22, and behind each connection hole 26 there is, integrally formed on the connection surface, a hollow body 28 in the form of a tube as a guide means for the connecting conductor and as a means for activating the spring (however, in the representation according to figure 3 only one of the hollow bodies 3 is visible). Each connection hole 26 and each guide means 28 are in this case associated with one of the two partial clamping springs 13a, 13b, as they result through the groove 218 in the clamping spring 12. Therefore, when in a connection terminal must be connected to two conductors, then a conductor is introduced through each of the two connection holes 26 and is fixed in each case through one of the partial clamping springs 13a, 13b. The separation and conduction of the connecting conductors 14 is carried out in the hollow bodies 28, which serve as guiding means for the connecting conductors 14, so that no separate guiding or separation devices are required in the connection terminal. In particular, it is not necessary to divide the recess 116 by means of a rib in two housing spaces.

[0094] The connection terminal 10 can be constituted in this very simple and narrow way. In this way, two connection terminals adjacent to each other can be incorporated into a switching device of the installation with a standardized module width, without overlapping the two connection terminals. This is advantageous, for example, when one of the two connection terminals of one phase and the other connection terminal disposed adjacent are associated with the neutral conductor. Then it is especially important that no electrical connection can be produced between the two connection terminals. If the connection terminals were not configured in accordance with the invention, then they should partially overlap to fit adjacent to each other in a switchgear housing of the installation at a standardized module width. But in this way, there is a danger of an electrical contact between the two connection terminals. Through the arrangement according to the invention of the two connection terminals, it is safely avoided, also in the case of connection terminals placed adjacent to each other in a housing with a standardized module width, a short circuit between the two terminals of Connection.

[0095] Through the spring force of the clamping spring 12, the cover piece 22 is pressed outwardly against the projection 234, so that the cover part always adopts a position in the rest state defined.

[0096] The cover piece therefore fulfills two functions: on the one hand, the functions of the conduction of the connecting conductors and, on the other hand, the function of the spring activation tool. Without external activation tool for the clamping spring, both rigid and flexible conductor ends can be inserted with the device according to the invention and can also be removed outside the terminal and, in particular, in two connecting terminals arranged adjacently between yes.

[0097] Obviously, in the cover piece 24, for example on the connecting surface 24 or on the pressure surface 230, an additional groove can still be present, through which an external tool could then be inserted for activation of the clamping spring 12.

[0098] In addition, a test hole 236 is arranged on the connection surface 24. Through this test hole it is possible to find an electrical contact with the clamping spring 2 by means of a test probe.

[0099] In the embodiment shown in Figures 1 and 3, the connection surface 24 of the cover piece 22 extends inclined with respect to the rear front side 5. The guide means 28 are approximately perpendicular to the connection surface 24. The angle of inclination, with which the connection conductor 14 is inserted into the Terminal, is therefore determined through the angle of inclination of the connection surface 24. An embodiment is also conceivable, in that the connection surface 24 extends approximately parallel to the rear front side 5, and the guide means 28 are inclined with respect to the connection surface 24. Then, the angle of inclination, with which the connection conductors are introduced 14 with the terminal, is determined by the angle of inclination of the guide means 28 in front of the connection surface 24.

[0100] The cover piece 22 can be manufactured very favorably as a plastic injection molded part in an injection process.

[0101] Figure 5 shows another embodiment of a switching device of the installation according to the invention, in which between the two connection terminals 10, 10 'an insulation plate 244 extending parallel to wide sides. A special embodiment for an insulation plate 244 of this type is shown in Figure 6. Accordingly, this insulation plate is essentially constituted by two parallel plates 247, 248, with different lengths, which are joined at a free end by means of a rib 249, so that, in general, a U-shape is with two arms of different length. The isolation plate 244 is inserted between the two connection terminals 10 and 10 'such that the longest of the two plates 247 covers the upper connection terminal 10 and the shortest of the two plates 248 covers the connection terminal lower 10 'towards the center of the installation switching device. Additionally, on the two plates 247, 248, a pivot 250 is still placed, with which the insulation plate 244 fits into corresponding grooves on the inner side of the housing parts 2, 2 'and is thus retained so not movable between the two connection terminals 10, 10 '.

[0102] Through the use of an insulating plate 244 according to Figure 5, a contact and, therefore, an electrical contact between the two connection terminals 10, 10 'are still more securely prevented. In addition, the insulation plate acts with a mechanical stabilization effect, for example it prevents a slip of the connection terminals 10, 10 ’transversely to the wide side 9 inside the switching apparatus.

[0103] In addition, in the embodiment according to Figure 5, an adjustment hole 246 is made above the lower connection terminal 10 'in the partial section 8a of the housing wall. Through this adjustment hole it is possible to intervene from the direction of the connection terminal space with a tool inside the switching apparatus, for example to access an adjustment means disposed there in the vicinity of the adjustment hole 246, for example an adjustment screw.

[0104] The exemplary embodiments shown explain the invention in an exemplary manner. In no way should they limit the invention to the exemplary embodiments shown there. Thus, for example, it is also conceivable to arrange the two non-shifted connection terminals, therefore adjacent to each other at the same height. The specific configuration of the terminal cover pieces 22, 22 ’is also not limited to the box shape shown. In this way, in particular, the second cover plate could be longer than the one shown. In general, the connection terminals 10, 10 'may also be arranged elsewhere on the narrow rear side 8, for example more oriented towards the fixing side 6.

[0105] The invention has been explained above in the example of an installation switching apparatus in the type of shell construction, in which two shell shells are assembled along a separation joint parallel to the wide sides . It is understood by itself that the invention can also be carried out in a switching device of the installation in a type of plinth construction, in which the housing is assembled from two parts along a separation joint parallel to the side Fixing.

[0106] In the same way, embodiments of switching devices of the installation according to the invention are conceivable, in which no additional threaded connection terminal is provided, but instead have the connection terminals without tools, exclusively of according to the invention. In this case, the connection terminals may also be made as tongue or blade connection terminals.

[0107] Figures 7 and 8 are considered below.

[0108] Figure 7 shows a partial sectional view of the connection terminal space 18 of another switching apparatus of the installation 1 according to the invention. Only the first lower connection terminal 10 is shown. The second upper connection terminal 10 is correspondingly made, but with a spaced spacer surface of the second terminal cover piece corresponding thereto.

[0109] The switching apparatus of the installation 1 has an insulating material housing formed by two housing parts 2 with a front front side 304, a rear front side 305, a fixing side 6, a narrow front side 7, a narrow rear side 8 as well as two wide sides 9, only one of which is shown in the view according to figure 1, which is in the drawing plane.

[0110] The connection terminal space 18 is delimited laterally, that is, to the wide side, by the wide sides 9 of the insulating material housing 3.

[0111] Towards the front front side 304, by means of a recess in the rear front side 305 of the housing part 2 a hole 20 of the connection terminal space 18 is formed, through which the Terminal connection 10, fixed in position in the space of connection terminals 18, for the connection of connection conductors 14. On the narrow front side 7 a partial section 356 of the housing side of the rear front side 305 is connected first. In this way, a hole 20 results in the rear front side 305 in the area between the end of the partial section 356 of the housing side, which is remote from the narrow front sides 7, and the narrow rear side 8.

[0112] By virtue of the other recess in the narrow rear side 8 of the housing part 2, the hole 20 of the connection terminal space 18 extends over the connecting edges between the narrow rear side 8 and the front side rear 305 still inside the narrow rear side 8. This has the advantage that there is high flexibility for the connection direction of the connecting conductor 14.

[0113] The connection terminal 10 described below corresponds essentially to the connection terminal already described in Figures 1 to 6. It comprises a busbar 102 and a clamping spring 312. The connection terminal 10 is fixed in position in the inner side of the wide side 9 by means of ribs 104 and pivots 106, 108 in a manner known per se in the connection terminal space 18. The connection terminal 10 fixed in position in the connection terminal space 18 is located in the area of the connecting edge between the narrow rear side 8 and the rear fixing side 6.

[0114] The busbar 102 of the connection terminal 10 comprises a connection end 112 and a branch area 114 which is connected therein. N the connection end 112 has a window recess 116 in the form of a support edge 18 and a clamping edge 120 opposite the support edge 118. The clamping edge 120 is in the transition from the connection end 112 to the bypass zone.

[0115] The holding spring 12 has a support arm 212, with which it rests on the support edge 118 of the bus bar 102. The support can be realized in such a way that the support arm 212 has at its end free an upward fold, with which it partially surrounds the support edge 118 in order to support it.

[0116] On the support arm 212 an arc piece 214 is connected and on it a connection terminal 216. The end of a connecting conductor (not shown here) is introduced from the side of the arc piece 214 in the recess 116 of the window type and can be held between the clamping arm 216 and the clamping edge 120 which functions as a counter-support. In this case, the free end of the clamping arm 212 passes through the window-shaped recess 116.

[0117] The busbar 102 has an approximately U-shaped basic shape, in which the connecting end 112 forms the first arm of the U, and the branch area 114 is formed by a transverse rib 220 and the second arm of the U 222. At the free end of the second arm of the U 222 an upward fold 224 is placed. In this upward fold 224 other connecting conductors can be placed, with which the Connection terminal 10 is connected to other modules inside the switchgear housing, such as trip modules. In particular, the connecting conductors of this fold up can be welded or tinned, but a screw connection is also possible.

[0118] In the embodiment of a connection terminal, shown in Figure 1, the fold up at the free end of the second arm of the U 222 is extended towards a branch rail

226. Bypass rail 226 is thus connected in positive connection with the second arm of U 222; it points approximately perpendicular from it in the direction of the recess 116 in the form of a window and the flap.

[0119] In the arc piece 214, in this embodiment, a first partial clamping arm 217 is first connected, which passes in a bending edge 219 to a second clamping partial arm 218 bent from the first partial arm of clamping 217, so that the first and the second partial clamping arm 217, 218 form an obtuse angle to each other. The obtuse angle opening points in the direction of introduction of the connecting conductor, the bending edge 219 is approximately in the center of the clamping arm 216.

[0120] The opening 20 of the connection terminal space 18 is covered by means of a terminal cover piece 22 which is connected in an articulated manner with the housing part 2.

[0121] The terminal cover piece 22 comprises a first partial body 322 that extends longitudinally in the direction of the rear narrow side 8, which is pivotally coupled by means of an articulation pivot 232 with the housing part 2 and a closure piece 354 pivotally coupled at its free end by means of a hinge 352, whose closure piece extends approximately parallel to the rear front side 305. For the improvement of mobility in hinge 352, this is made as movie hinge.

[0122] The first partial body 322 comprises a first cover plate 323, which covers the space of connection terminals 18 at the bottom, adjacent to the fixing side 6, of the narrow side 8, and which has a counter piece approximately of tubular shape with respect to articulation pivot 232, with which it is pivotally coupled to the articulation pivot. The first cover plate 323 has a pressure plate 330 accessible from the outside and manually activated.

[0123] In the vicinity of the free end of the pressure surface 330, the first cover plate 323 is connected by means of an intermediate piece 325, which points towards the inside of the housing, with a distance surface 338, which extends in the same way parallel to the narrow rear side 8 in the direction of the front side 305 and covering the connection terminal space 18 at the top, adjacent to the rear front side 305, of the narrow side 8.

[0124] At the free end of the distance surface 338 is the film hinge 352 already mentioned with the closure piece 354 pivotally coupled therewith.

[0125] This is a plate, which overlaps at its free end, at least partially, with the part 356 of the housing side of the rear front side 305. The closure piece 354 and the part 356 of the side of the In this way, the rear front side housing together forms the rear front side 305.

[0126] At its free end, the closure piece 354 has pivots 358, which are spaced laterally and pointing in the direction of the wide sides 9. In the housing, in the vicinity of the piece 356 on the side of the housing of the rear front side 305 is made a guide 360 in the form of a slide, and specifically in such a way that the pivots 358 are received in the guide 360.

[0127] When the terminal cover part 22 is now articulated by means of pressure on the pressure surface 330 in the direction of the interior of the apparatus, then the closure piece 354 will slide behind the part 356 on the side of the housing of the rear front side 305 and will be guided displaceably through the guide 360 in the form of a slide parallel to it. The angle between the closure piece 354 and the distance surface is modified in this case.

[0128] In this way, the closure piece 354 and the distance surface 338 form in the closed position according to Figure 7 an acute angle to each other, which is open towards the inside of the housing. In the position according to Figure 2, when the terminal cover piece 22 is articulated towards the inside of the housing, the closing part 354 and the distance surface 338 form an obtuse angle with the opening towards the inside of the housing.

[0129] When the terminal cover piece is activated and when the articulation involved with it around the articulation pivot 232 is made, the closure piece 354 and the distance surface 338 perform in the same manner a mutual articulation movement around movie hinge

352

[0130] Through the placement of the film hinge between the closure piece 354 and the distance surface 338, therefore, the closure piece 354 can be displaced by saving approximately parallel space behind the part 356 on the side of the 305 rear front side housing.

[0131] Intermediate part 325 has an outwardly directed connection surface. At least one connection hole 26 is present on the connection surface 324. Starting from the connection hole 26, the intermediate piece 325 is pierced by a tubular shaped recess 28, which starts approximately vertical from the connection surface 324 through the part intermediate 325 and thus serves as a guide means for a connecting conductor that is connected to the connecting conductor 10.

[0132] The connecting conductor is led through the connection hole 26 in the terminal cover piece 22 and strikes after leaving the recess 28 tubularly on the clamping arm 216 of the clamping spring 312.

[0133] When the connecting conductor is a rigid conductor, then only by means of the connecting conductor can the clamping arm 216 of the clamping spring 312 be pressed out of the clamping edge 120 to the point that the connecting conductor is it can be inserted between the free end of the clamping arm 216 and the clamping edge 120 in the window-shaped recess 116 and can be fixedly held.

[0134] In the case of a flexible connecting conductor, the window-shaped recess 116 must first be opened differently.

[0135] This is done by articulating the terminal cover piece 22.

[0136] In the vicinity of the tubular shaped recess 28, the terminal cover piece 22 carries in the intermediate piece 325 a projection 30 directed towards the clamping arm 216, which serves as a means of activating the spring.

[0137] In the protrusion 30, other protruding elements or components can of course also be discussed, in particular the function of the protrusion 30 can also be assumed by a rib that surrounds the outlet opening of the tubular shaped recess 28 .

[0138] Through the recovery spring force of the clamping arm 216, it presses the shoulder 30 and thereby the terminal cover piece 22 outwards.

[0139] Through the pressure on the pressure surface 330 or on the distance surface 338, the terminal cover piece 22 is articulated inwardly, and by means of the projection 30 the clamping arm 216 is pressed out of the edge of clamp 120 to the point that the window-shaped recess 116 is free for the introduction of the connecting conductor, as seen in the figure

8.

[0140] The projection 30 is integrally formed in the terminal cover piece 22 and is configured in such a way that during the articulation of the cover piece against the clamping spring, it drives it with an opening effect near the bending edge 219.

[0141] Through its alignment in such a way that during the articulation of the cover piece it drives the clamping spring with an opening effect near the bending edges, during the activation of the opening of the terminal cover part it is required less expense of force, keeping the opening surface of the same magnitude in the clamping advantage.

[0142] In a specific example, the first and second partial clamping arm 217, 218 form an angle of approximately 160 °. In front of the otherwise unchanged clamping spring with straight, unfolded clamping arm 216, the activation force is divided in half by the activation force with a maximum opening of the terminals.

[0143] Correspondingly proceed to loosen a fixed connection conductor. The pressure on the terminal cover piece 22 releases in the manner described above the clamping between the clamping arm 216 and the connecting conductor, so that it can be removed out of the window recess 116. By virtue of the bent embodiment described above of the clamping arm 216, the activation force for loosening the connecting conductor is also essentially reduced.

[0144] Correspondingly proceed to loosen a fixed connection conductor. The pressure on the terminal cover piece 22 releases in the manner described above the clamping between the clamping arm 216 and the connecting conductor, so that it can be removed out of the window recess 116.

[0145] Alternatively, the opening movement of the terminal cover piece 22 can also be activated by means of a regular screwdriver with a longitudinal groove or a cross groove

364. To this end, it is placed at an acute angle in a housing hole 350 (cross-shaped or spherical cut-out) suitable for accommodation in the distance surface 338 and the terminal is opened through a movement of Press with the screwdriver 364.

[0146] Although in the representation according to Figures 7 and 8 only one connection hole 26 and only one tubular shaped recess 28 is shown, obviously two or more such connection holes and recesses for the housing and the housing can also be provided. connection of several connecting conductors in intermediate piece 325. All connected connecting conductors can be fixed with a common clamping spring through their clamping arms 216. When the terminal cover piece 22 is activated, they are then released at the same time all connected conductors and can be released at the same time.

[0147] The terminal cover piece 22 with the first partial body 322, the hinge 352 and the connection piece 354 is constituted, in another embodiment, for which, however, the same figures 7 and 8 are applied As schematic drawings, it consists of two components of materials with different mechanical properties.

[0148] These are joined together in a two component injection casting process.

[0149] The result is a hard / soft joint. The hard component forms the main component. From this, the first partial body 322 is manufactured. It serves to transmit the activation forces on the clamping spring 312 and to prevent or at least minimize the bending of the component.

[0150] In the area of hinge 352 and connection piece 354, the soft component is used.

[0151] This enables easy hinge mobility, which is necessary so that the above-described angular modification of the angle between the closure piece 354 and the first partial body 322 can be easily adjusted during activation of the cover piece of terminals 22.

[0152] In this embodiment, hinge 352 does not necessarily have to be a film hinge. Since the mobility of the hinge is ensured through the selection of a flexible material in the hinge area, not only through the thickness of the hinge.

[0153] A flexibility of the closure piece 354 further contributes to the fact that it, when moving in the guide 360 of the slide type in the direction of the narrow front side 7 parallel to the rear front side 305, can also be slightly folded itself and can be supported more closely on the narrow front side 305.

[0154] In general, this leads to a very narrow guide of the closure piece 354 on the rear front side 305 and, therefore, a large space saving during articulation of the terminal cover part 322.

List of reference signs

[0155]

1 Installation switching device 10, 10 'Screwless connection terminal 102, 102' Busbar 104 Rib 106 Pivot 108 Pivot 11 Screw terminal hole 110 Projection 112, 112 'Connection end 114, 114' Branch area 116, | 16 'Window type recess 118 Support edge 12, 12' Clamping spring 120, 120 'Clamping edge 13a, b Partial spring 14 Connection conductor 16 Insulated end of the connection conductor 18 Connection terminal space 2 Housing part, housing 2 'Housing part 20 Connection terminal space hole 212 Support arm 212' Support arm 214 Arc piece 214 'Arc piece 216 Holding arm 216' Holding arm 217 First partial clamping arm 218 Second partial clamping arm 2181 'Slot 2181 Slot 219 Bending edge 22 Cover part, terminal cover part 22' Cover part, terminal cover part en 220 Transverse rib 222 Second arm of the U 224 Lateral tilt 226 Bypass rail 228 Lateral tilt 230 Pressure surface 230 'Pressure surface 232 Joint pivot 232' Joint pivot 234 Projection 234 'Projection 236 Test hole 236' Hole test surface 238 Distance surface 24 Connection surface 24 'Connection surface 240 Second control surface 242 Insulation rib 244 Insulation plate 246 Adjustment hole 247, 248 Plate 249 Vein 26 Connection hole 26' Connection hole 28 guide, pipe type recess 29, 29 'Side surface 2a Separation joint 3 Housing 30 Spring activation means, projection 304 Front front side 305 Rear front side 312 Holding spring 322 First partial body 323 First cover plate 324 Surface connection 325 Intermediate piece 330 Pressure surface 338 Distance surface 350 Intervention Hole

352 Hinge

354 Closing piece

356 Part of the housing side of the rear front side

5 358 Pivot

360 Sliding type guide on the inner wide side

364 Screwdriver

4 Front front side

5 Rear front side 10 6 Fixing side

7 Narrow front side

8 Narrow back side

8 ’Narrow back side

8a Housing wall section 15 9 Wide side

Claims (23)

1.- Installation switching device (1) with a housing (3), with a front front side (4) and a rear front side (5), with a fixing side (6), with narrow front sides ( 7) and rear (8) and with wide sides (9), and with two connection terminals (10, 10 ') without screw, respectively, with at least one clamping spring (12, 12') for the connection of conductors of connection (14), in which the clamping springs (12, 12 ') are fixed in position in a space of connection terminals (18) of the housing (3), in which the space of connection terminals ( 18) is open towards the wide sides of the housing (9) and towards the front side such that each connection terminal (10, 10 ') is covered by a terminal cover piece (22, 22') associated with the same, which has a connection surface (24, 24 ') with a number of connection holes (26, 26'), which corresponds to the number of connection conductors (14 ) to be connected as well as guide means (28, 28 ') formed integrally in each connection hole (26, 26') for the connection conductors (14), which also has two lateral surfaces (29, 29 ') , which covers the connection terminal (10, 10 ') laterally in the direction of the wide sides (9), characterized in that in each terminal cover piece (22, 22') pivotally connected to the housing (3) integral means for activating the spring (30, 30 ') are formed and are configured in such a way that during the articulation of the terminal cover piece (22, 22') against the clamping spring (12, 12 ') respectively, they push it with an opening effect. 2.- Switching apparatus of the installation according to claim 1, characterized in that the guide means (28, 28 ') are hollow bodies of the type of tubes, which form an inlet channel, which serve at the same time as spring activation means (30, 30 ') for the clamping spring (12). 3.- Switching apparatus of the installation according to claim 1 or 2, characterized in that the two terminal connections (10, 10 ') are displaced towards each other transversely to the wide side (9) and one against the another in height above the fixing side (6). 4.- Switching apparatus of the installation according to claim 1, characterized in that each part of the terminal cover (22, 22 ') is elastically driven by means of the clamping spring (12, 12') associated with it in against the input address of the external connection conductor (14) and can be pressed against the clamping spring (12, 12 ’). 5.- Switching apparatus of the installation according to claim 4, characterized in that each part of the terminal cover (22, 22 ') is elastically driven by the projection (234, 234') of the housing wall ( 2), which serves as a stop. 6. Switching apparatus of the installation according to one of the preceding claims, characterized in that each part of the terminal cover (22, 22 ') has a manually activated pressure surface (230, 230'), accessible from the Exterior. 7. Switching apparatus of the installation according to one of the preceding claims, characterized in that the space of connection terminals (1) comprises between the two connection terminals (10, 10 ') an insulating plate (244) which is extends parallel to the wide sides (9). 8.- Switching apparatus of the installation according to one of the preceding claims, characterized in that the terminal cover piece (22, 22 ') has a test opening (236, 236') for an electrical connection of the terminals connection (10, 10 '). 9. Installation switching device according to one of the preceding claims, characterized in that an adjustment hole (246) is made in the rear wall of the housing above the terminal cover piece (22 ’). 10.- Switching apparatus of the installation according to one of the preceding claims, characterized in that the terminal cover piece (22, 22 ’) has an intervention hole for an activation tool. 11.- Switching apparatus of the installation according to claim 1, characterized in that with the free end, directed towards the front side, of a first partial body (322) of each terminal cover piece (22, 22 ') a closing piece (354) is articulated coupled, which covers the space of connection terminals (18) on the front side (305) in collaboration with an end of the front side (356) fixed in the housing, so that during activation of the terminal cover piece (22, 22 '), the closure piece (354) overlaps, at least partially, with the end of the front side (356) fixed in the housing. 12. Switching apparatus of the installation according to claim 11, characterized in that the closure piece (354) is coupled with the terminal cover piece (22, 22 ’) by means of a hinge (352). 13.- Switching apparatus of the installation according to claim 11, characterized in that the closure piece (354) is guided in a displaceable way parallel to the front side (304, 305) by means of guide pivots (358) which is they distance laterally, in a guide (360) of the type of fixed slide in the housing. 14.- Switching apparatus of the installation according to claim 11, characterized in that the terminal cover piece (22) then carries a distance surface (338) from the connection surface (324), which forms in the area on the narrow side (8) the closure of the side of the terminal cover piece of the terminal housing space (18), so that the closure part (354) is pivotally coupled at the end of the distance surface (338) that is directed towards the front side. 15.- Switching apparatus of the installation according to claim 11, characterized in that the closure piece (354) is constituted, at least in the area of the coupling with the first partial body (322), of a material having properties mechanical than the first partial body (322) of the terminal cover piece (22). 16.- Switching apparatus of the installation according to claim 12, characterized in that the hinge (352) and the closure piece (354) is constituted in the hinge zone (352), of a material having mechanical properties other than the first partial body (322) of the terminal cover part (22). 17.- Switching apparatus of the installation according to claim 14, characterized in that the distance surface (38) is made rigid, and that the closure part (354) is made, at least in the area of the coupling with the surface spacer (338), softer than the spacer surface (338). 18.- Switching apparatus of the installation according to one of claims 15 to 17, characterized in that the terminal cover piece (22) with the closure part (354) coupled therewith is manufactured in a casting process by two component injection. 19.- Switching apparatus of the installation according to claim 1, with a respective clamping spring (12, 12 '), which acts as a compression spring on the end of the conductors, for fixing a conductor end (16) in a counter bearing, in which -each connection terminal (10, 10 ’) comprises a busbar (102, 102’) with a connection end (112, 112 ’) and a branch area (114, 114’) which is then connected, -each busbar (102, 102 ') has at the connecting end (112, 112') a recess (116, 116 ') of the window type with a support edge (118) and with a clamping edge (120 , 120 '), opposite the support edge (118), in the transition from the connecting end (112, 112') to the branch area (114, 114 '), -each clamping spring (12, 12 ’) has a support arm (212, 212’), with which it is supported by the support edge (118) of the busbar (102, 102 ’), and - an opposite piece (214, 214 ') is connected to the support arm (212, 212') and a clamping arm (216, 216 ') in it, so that the end of the conductor (16) can be fixed between the clamping arm (216, 216 ') and the clamping edge (120, 120') as against bearing. 20.- Switching apparatus of the installation according to claim 19, characterized in that in the arc part a first partial clamping arm is connected, which passes in a bending edge to a second partial clamping arm folded from the first partial clamping arm, so that the first and the second partial clamping arm form an obtuse angle to each other, whose opening points in the direction of insertion of the connecting conductor. 21.- Switching apparatus of the installation according to claim 19, characterized in that each busbar (102, 102 ') has approximately a U-shape, so that the connecting end (112, 112') forms one of the arms of the U, and the bypass zone (114, 114 ') is formed by a transverse rib (220) and by the other arm of the U (222). 22.- Switching apparatus of the installation according to claim 21, characterized in that at the free end of the other arm of the U (222) a branch rail is formed integrally, which extends approximately perpendicular to the other arm of the U (222) and the side of the connecting end (112, 112 '), which is opposite the clamping edge (120, 120'), is supported on the branch rail. 23.- Switching apparatus of the installation according to claim 19, characterized in that the clamping arm (216, 216 ') of each clamping spring (12, 12') is shaved in the longitudinal direction, so that they result in each case two partial springs (13a, 13b) suitable for clamping independently of each other, which are associated in each case with a connection hole (26, 26 ') in each terminal cover piece (22, 22 ').