EP1914839A2 - Installation switching device - Google Patents

Abstract

The device (1) has a clamping contact area (18) that is open to a broad side (9) of a housing and to a front side, and clamping contacts (10, 10') which are covered by clamp covering parts (22, 22') pivotably connected with the housing. The part has connection surface (24, 24') with connection holes (26, 26') corresponding to number of line connections. Guiding unit is formed at each connection hole (26, 26') for the connections, and has two side surfaces (29, 29'), which covers the contacts laterally in a direction of the broad side.

Description

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

A generic installation switching device comprises within its housing at least one contact point with at least one fixed and one movable contact piece, via which a current leading from an input to an output terminal current path can be opened and closed. The contact point is generally operated by a rear derailleur with Verklinkungsstelle. A generic service switching device may further comprise tripping devices, for example a thermal release or a magnetic quick release, which act on the contact point or the rear derailleur when a short circuit or fault current occurs in the current path, so that the contact point is opened.

In some generic service switching devices in addition to the current-carrying pole is still connected in the neutral. In such devices, it is then necessary that two conductors can be connected close to each other at the terminal connection side, but remain electrically isolated from one another at the connection point of the service switching device.

For connection with external connection conductors, screw-type terminal connections are used in addition to screw terminals in generic service switching devices. As clamping elements can thereby plug terminals or spring terminals for Use come. In principle, these can greatly simplify the connection of connecting conductors, but today known installation switching devices with screwless terminal connections are subject to disadvantages.

From the EP 1 432 077 A1 a generic service switching device with two screwless terminal connections is known in which the terminal connection space bounded laterally by the housing sides and the narrow side of the housing is open and covered with a width corresponding to the width of the housing solid cover. The cover is clipped onto the narrow side of the housing on this. The terminal connection according to EP 1 432 077 It can only be operated with a tool to insert flexible conductors and to remove the conductors from the terminal connection.

The EP 1 213 791 B1 shows an installation switching device with two superimposed and partially transversely shifted fasteners spring-type terminal. The actuation of the terminal element is only possible with an external tool.

It is therefore an object of the present invention to provide a generic service switching device, in which two screwless terminal connections are assigned to one another on one side of the service switching device in a common terminal connection space and the terminal connections in a simple and cost-effective manner is designed so that the tool-free insertion and removal of leads is possible.

The object is achieved by a generic service switching device with the characterizing features of claim 1. According to the invention, the terminal connection space to the housing sides and the front side open, and the two terminal connections are transverse to the broad side next to each other and in height above the mounting side against each other, and each of the two terminal terminals is covered by a terminal cover member pivotally connected to the housing. Each terminal cover part has a connection surface with a number of connection openings corresponding to the number of connection conductors to be connected, and guide means for the connection conductors formed on each connection opening. Furthermore, each terminal cover part has two side surfaces which, when attached Cover the terminal cover part of the terminal connection assigned to it laterally in the direction of the broad sides.

According to an advantageous embodiment of the invention spring actuation means are formed on the terminal cover and formed so that they act upon opening the cover against the clamping spring opening.

Another very advantageous embodiment of the invention provides that the guide means are tube-like, an insertion channel forming hollow body, which also serve as a spring actuating means for the clamping spring.

Each terminal connection of a service switching device according to the invention comprises very few components, namely essentially only the clamping spring, a busbar with a clamping edge against which the clamping spring clamps the connecting conductor to be connected, and the terminal cover. An inventive installation switching device comprises two such terminal connections, which are arranged side by side on a connection side of the device. It is therefore very easy and inexpensive to manufacture.

According to a particularly advantageous embodiment, the two terminal connections are also offset in height above the mounting side against each other and thus offset. In this way, the creepage and clearance between the two terminal connections are lengthened, further securing the electrical insulation between the two terminal connections.

• Die an dem Klemmenabdeckteil an jeder Anschlussöffnung angeformten Führungsmittel sorgen für die Führung des Anschlussleiters hin zur Klemmfeder in dem gewünschten Einführungswinkel. Weder die Stromschiene, noch die Klemmfeder selbst brauchen weitere Führungsmittel zur Führung des Anschlussleiters vorzuweisen.
• Mehrere Anschlussleiter werden durch mehrere Anschlussöffnungen eingeführt und dabei gleichzeitig auseinander gehalten. Somit ist auch bei mehreren anzuklemmenden Leiterenden ein individuelles Einführen jedes einzelnen Leiterendes möglich, ohne dass auf Seiten der Klemmfeder oder der Stromschiene weitere Maßnahmen zum Auseinanderhalten der einzelnen Leiter erforderlich sind.
• Durch die gemäß einer vorteilhaften Ausführungsform gleichzeitig an dem Klemmenabdeckteil angeformten Federbetätigungsmittel wird das Klemmenabdeckteil gleichzeitig zum Öffnungswerkzeug für die Klemmfeder. Ein separates Betätigungswerkzeug, beispielsweise ein Schraubendreher, ist nicht mehr erforderlich, um die Klemmfeder zu öffnen. Dadurch wird das Einführen und das wieder Entnehmen von Anschlussleitern stark vereinfacht.

The terminal cover part is designed to perform several functions in one component:

• The integrally formed on the terminal cover at each connection opening guide means to guide the connection conductor towards the clamping spring in the desired insertion angle. Neither the busbar, nor the clamping spring itself need to show further guidance means for guiding the connecting conductor.
• Several connection conductors are inserted through several connection openings while at the same time kept apart. Thus, it is also to be clamped at several Ladder ends an individual insertion of each conductor end possible without further action on the side of the clamping spring or the busbar to keep apart of the individual conductors are required.
• By virtue of the spring actuation means formed integrally on the terminal cover part according to an advantageous embodiment, the terminal cover part simultaneously becomes the opening tool for the clamping spring. A separate operating tool, such as a screwdriver, is no longer required to open the clamping spring. This greatly simplifies the insertion and removal of connecting leads.

An installation switching device according to the invention has the overall advantage that two terminal connections are mounted on one connection side and in a terminal connection space in a simple manner and from the outside very convenient accessible side by side, the two terminal terminals are electrically isolated from each other and independently operable without tools. For insertion as well as removal of fixed and flexible terminal connection leads into or out of the terminal connection, no external tool is required. The terminal connections are easy to set up with just a few prefabricated components

According to an advantageous embodiment of the invention, each terminal cover is resiliently acted upon by the associated clamping spring against the insertion direction of the external connection conductor and pressed against this clamping spring. In this case, in a particularly advantageous manner, the terminal cover part can be resiliently acted upon by the clamping spring assigned to it against a projection of the housing wall serving as a stop. Thus, the terminal cover is held by the resilient application of the associated clamping spring in a defined starting position. The starting position is the closed position of the clamping spring.

The terminal cover can be made particularly simple and can be produced for example as a cost-effective injection molded part.

For the pressure actuation of the terminal cover part it can be provided that the terminal cover part has an externally accessible, manually operable pressure surface.

A further advantageous variant of the invention is characterized in that the terminal connection space between the two terminal connections comprises an insulating plate running parallel to the broad sides. As a result, a contact and thus an electrical contact between the two terminal connections, for example between the two busbars avoided. In addition, the insulating acts mechanically stabilizing.

In order to ensure access to the terminal connection in a simple manner for a voltage tester in the operating state, ie after the final installation of the service switching device, the terminal cover part can have a test opening for electrical contacting of the terminal connection.

A further advantageous variant of the invention is characterized in that an adjustment opening is made in the vicinity of a terminal cover part in the housing wall. This makes it possible to intervene during manufacture or in the installed state of the finished mounted switching device with a tool inside the switching device to access an arranged there in the vicinity of the adjustment opening adjustment means.

Regarding the spatial. Arrangement of the terminal surface of the terminal cover with respect to the front of the housing and the guide means relative to the pad provides a possible embodiment of the invention that the terminal surface of the terminal cover is approximately parallel to the rear front side and the guide means are inclined relative to the terminal surface of the terminal cover. The angle of inclination for the guide means is selected, for example, according to the fact that the connection conductors remain easily accessible when mounting a service switching device according to the invention, for example in a distribution box, and the connection conductors are not bent too much towards the top.

A further advantageous embodiment provides in this respect that the terminal surface of the terminal cover part inclined relative to the rear front side and the guide channels extend approximately perpendicular to the connection surface. The inclination angle at which the leads are inserted relative to the spring clip is determined in this embodiment by the angle of inclination of the guide channels.

It would of course also a combination of the above two options are conceivable in which both the connection surface of the terminal cover opposite the rear front side, and the guide channels are inclined relative to the connection surface.

In order to enable on request, for reasons of redundancy, in addition, the operation of the spring clamp by an external tool, according to another embodiment of the service switching device according to the invention, the terminal cover having an engagement opening for an operating tool. Through this engagement opening can then be spent with the actuating tool, such as a screwdriver, the clamping spring in its open position.

According to a further, very advantageous embodiment, with the free, the front facing end of a first body part of each terminal cover pivotally coupled a closure member which covers the terminal connection space on the front side in cooperation with a housing-fixed front end, wherein upon actuation of each terminal cover the closure member with the housing-side front end at least partially overlapped.

The respective closure part and the housing-fixed part of the front side together form the front side. The respective closure part thus acts as a supplement to the housing-fixed part as klemmenabdeckteilseitiges part of the front.

According to a particularly advantageous embodiment, the closure part is plate-shaped. It may advantageously be made in the same injection molding process as the terminal cover.

Especially advantageous is an embodiment in which the respective closure part is coupled to the respective terminal cover part by means of a hinge, for example a film hinge. Such a film hinge can be produced very inexpensively by injection molding.

Another very advantageous embodiment of the invention is characterized in that the respective closure part is guided in each case displaceably parallel to the front side via laterally projecting guide pins in a housing-fixed, slide-like guide. The respective closure part is then overlapped and displaceably guided with the respectively associated housing-side part of the front side. It can be pivoted and moved when pressing the respective terminal cover behind the respective associated housing-side part of the rear front. Thus, a tight covering of the terminal receiving space is ensured to the front side with simultaneous movement of the terminal cover and mechanical stability of the rear front.

By attaching the hinge to the respective closure part, this can move in a space-saving parallel to the front in a backdrop-like leadership.

A further very advantageous development of the invention is characterized in that the respective terminal cover part carries a spacer surface following the connection surface, which forms the terminal cover-side closure of the terminal receiving space in the region of the respective narrow side, the closure part being pivotably coupled to the end of the spacer surface facing the front side is. This makes it possible to move the pad in one of the mounting side closer part of the narrow side wall of the switching device, if this is required due to a predetermined arrangement of the terminals in the interior of the switching device near the mounting side.

According to a particularly advantageous development of this embodiment, the spacer surface is designed to be stiff. Thus, a power transmission to the spring of the terminal is also possible by pressing the terminal cover over the spacer surface. This is advantageous if the pressure surface of the terminal cover is due to the location of the terminal very close to the mounting side of the switching device in the installed position of the switching device, for example, in an installation distributor, by an operator is difficult to access. The distance surface can thus be used in a region which is not covered by a connecting conductor, as a second pressure surface for actuating the spring.

In a particularly advantageous further embodiment of the invention, the spacer surface carries an engagement opening for an actuating tool. The terminal can thus be operated via the terminal cover either manually or by means of a tool.

According to a further, very advantageous embodiment of the invention, the respective closure part is at least in the region of the coupling with the first part body of a material that has different mechanical properties than the first part body of the terminal cover.

Again, the closure part covers the terminal connection space on the front side in cooperation with a housing-fixed front side end, wherein upon actuation of the terminal cover part, the closure part at least partially overlaps the housing-fixed front side end.

The respective closure part and the housing-fixed part of the front side together form the front side. The respective closure part thus acts as a supplement to the housing-fixed part as klemmenabdeckteilseitiges part of the front.

Particularly advantageous is an embodiment in which the hinge and the respective closure part in the region of the hinge consists of a material which has different mechanical properties than the first part body of the terminal cover part.

Because the respective closure part, at least in the region of the coupling with the first part body of the respective terminal cover part, consists of a material with different mechanical properties than the latter, the resilient properties of the respective closure part and its coupling to the respectively first part body can be independent of those of the respective first part Part body of the terminal cover part set and optimized for the intended use. This is particularly advantageous if other, sometimes even opposite, mechanical requirements are placed on the respective first part body of the terminal cover part than on the closure part.

This can then be the case when the respective terminal cover at an actuation, ie a pivoting into the interior of the switching device inside, simultaneously activates the respectively associated clamping spring against its restoring spring force.

This can be effected, for example, by spring actuation means integrally formed on the respective terminal cover part in a suitable position and acting upon pivoting of the terminal cover part onto the clamping spring.

In this case, the first sub-body of the respective terminal cover has a high rigidity, so that the force can be transmitted to the opening of the respective clamping spring without deformation of the respective terminal cover.

However, the respective closure part should be flexible, but at least flexibly coupled to the first part of the body of the terminal cover so that it can slide to save space during the pivoting of the terminal cover in the backdrop-like guides behind the housing-side front end.

During pivoting of the respective terminal cover part into the interior of the device, the angle between the closure part and the first part body of the respective terminal cover part will inevitably change.

Because the closure part should be as parallel as possible to the housing-fixed front end. However, the angle between the first sub-body of the terminal cover and the housing-fixed front end changes during pivoting of the terminal cover. Therefore, a mobility of the closure part relative to the first part body of the terminal cover part is required at the coupling point, which can only be achieved by a flexibility of the material at this point.

According to a particularly advantageous embodiment of the invention, the spacer surface is designed stiff, and the closure part is at least in the region of the coupling with the spacer surface made of a soft material, which is softer than the spacer surface executed.

Thus, the two conflicting requirements for different body parts of the terminal cover are met. A single component, the respective terminal cover, has different material properties in some areas. Due to the rigid part of a transmission of force to the respective spring of the terminal is also possible by pressing the terminal cover over the spacer surface. The closure part, the second part, can nevertheless turn easily and move parallel to the front panels and behind them.

In a particularly advantageous embodiment of the invention, the terminal cover part is produced with the closure part coupled thereto in a two-component injection molding process. In this process, materials with different mechanical properties, so for example hard and soft plastics, are joined together in injection molding.

With regard to an advantageous embodiment of the terminal connections, each terminal connection of an installation switching device according to the invention comprises a compression spring acting on the conductor end clamping spring for clamping the conductor end to an abutment, wherein the clamping connection comprises a busbar with a terminal end and an adjoining discharge area. At the connection end, the busbar has a window-like recess with a supporting edge and a clamping edge opposite the supporting edge at the transition of the connection end into the diverting region. The clamping spring also has a support leg, with which it is supported on the support edge of the busbar. At the support leg includes a curved piece and a clamping leg, so that the conductor end between the clamping leg and the clamping edge is clamped as an abutment. The conductor end can be inserted from the side of the elbow piece into the window-like recess.

According to an advantageous embodiment of the invention connects to the respective elbow a first part-clamping leg, which merges at a bending edge in a bent from the respective first part-clamping leg second part-clamping legs, so that the respective first and the second part-clamping legs a occupy obtuse angle with each other, the opening points in the insertion direction of the connecting conductor.

The obtuse angle between the respective first and the respective second partial clamping legs offers the advantage that the point of application can be placed in the vicinity of the spring actuating means in the vicinity of the bending edges. Thereby, the contact point of the spring actuating means may have a greater distance to the pivot point of the clamping leg on the elbow without the thereby achievable maximum terminal opening is smaller, and without the spring actuating means would be a connection conductor with a large cross section in the way. However, a greater distance between the contact point and the pivot point means a more favorable lever ratio and thus a lower actuation force for the user.

A preferred embodiment is characterized in that the busbar has approximately a U-shape, wherein the terminal end forms the one U-leg, and the diverting region is formed by the transverse web and the other U-leg. It can be provided at the free end of the other U-leg upstand for attaching further conductors that lead into the interior of the service switching device.

According to a further embodiment, at the free end of the other U-leg and a discharge bar may be formed. In this case, the discharge bar can run approximately perpendicular to the other U-leg, and the side of the connection end opposite the clamping edge can be supported on the discharge bar.

Another advantage of a service switching device according to the invention is that the dissipation region of the busbar can be used for electrical contacting during the calibration of the bimetallic strip. In previously known installation switching devices, the contact point for the calibration of the bimetallic strip is located at another location, outside the access area of the terminal connection, and is not accessible via the terminal connection. Since the calibration of the bimetallic strip can only take place in the fully assembled state, in the case of known service switching devices following the calibration, the separate access openings to the calibration contacts must be covered by additional cover parts.

This is not necessary in an installation switching device according to the invention. It is thus compared to both known from the prior art installation switching devices both mounting parts - namely the additional cover - - saved as well as manufacturing steps in the assembly, so that there is a further advantage of the installation switching device according to the invention by the resulting simplification of assembly.

An inventive installation switching device can be completely assembled, except for the terminal cover parts. Now - by means of electrical contacting through the opening of the terminal terminal - the calibration of the bimetallic strip is made by the Ableitbereich the busbar is used as a calibration contact. After calibration, the terminal cover is placed, and thus completed the installation switching device. A separate cover for the calibration opening is no longer required.

Another advantage is given by the fact that due to the design according to the invention, the terminal connections of a service switching device according to the invention are designed so that they have only a small electrical resistance even with very narrow outer dimensions. This is achieved in that the bus bar in the discharge region between the clamping edge and the point at which another conductor is fixed, which leads into the interior of the service switching device, has a uniform width. This makes it possible to build installation switching devices according to the invention also in half standard module width.

According to DIN 43 880, a division unit a is defined for the installation width of service switching devices. According to this standard, the paving width is a whole number or half integer multiple of 17.5 mm, more precisely: a = n x (17.5 mm + 0.5 mm), n = 0.5; 1.5; 1.5; 2,0, ....

An installation switching device with a half standard module width thus has a mounting width of 9 mm.

The busbar has only a single window-like recess for receiving a plurality of connection conductors. The individual connection conductors, which are accommodated in the one recess of the busbar, are held apart by the connection openings and the guide means connected to them. For an individual insertion and removal of multiple connection conductors in only a single recess is possible without the individual connection conductors affect each other.

Even better that is possible in a further embodiment of the invention in which the clamping leg of the clamping spring is slotted longitudinally, so that two closely spaced, independently clampable part springs arise, each associated with a connection opening in the terminal cover and thus each to be connected terminal conductor , Due to the fact that the two part springs lie close to each other, ie without a separating larger intermediate space or an intermediate web located approximately in the middle, a further contribution to a narrow design of the terminal connection is made, by which the terminal connection according to the invention in a service switching devices only one half standard module width can be installed.

In the previously known installation switching devices, a separate recess in the busbar is provided at the terminal connections for each terminal conductor, separated by a central web. Thus, the terminal connections become so ready that when two terminal connections are installed in a service switching device of a standard module width, the two terminal connections must partially overlap. This complicates the required electrical insulation between the two terminal connections according to the prior art.

The invention makes it possible to use two terminal connections next to one another in an installation switching device of a standard module width, which are electrically isolated from one another and do not have to overlap. As a result, electrical crosstalk between the two adjacent terminal connections is reliably avoided.

Further advantageous embodiments and improvements of the invention and further advantages can be taken from the subclaims.

Reference to the drawings, in which 2 embodiments of the invention are shown, the invention and further advantageous refinements and improvements of the invention will be explained and described in detail.

Figur 1:

eine schematische Ansicht eines erfindungsgemäßen Installationsschaltgerätes,

Figur 2:

eine vergrößerte Ansicht des oberen Klemmenanschlusses des Installationsschaltgerätes gemäß Figur 1 mit aufgesetzter Klemmenabdeckung,

Figur 3:

eine schematische Einsicht in einem Klemmenanschluss entsprechend der Figur 2, wobei die Seitenwand der Klemmenabdeckung entfernt wurde,

Figur 4:

eine schematische Ansicht des Klemmenanschlussraumes gemäß Figur 1, bei abgenommenen Klemmenabdeckungen,

Figur 5:

eine weitere Ausführungsform eines erfindungsgemäßen Installationsschaltgerätes mit einer Isolierplatte zwischen den beiden Klemmenanschlüssen, sowie

Figur 6:

eine Isolierplatte zum Einsetzen in ein erfindungsgemäßes Installationsschaltgerät gemäß Figur 5.

Figur 7:

eine schematische Teilschnittansicht einer weiteren Ausführungsform eines erfindungsgemäßen Installationsschaltgerätes, welches nur den ersten, unteren Klemmenanschluss zeigt, mit einem Klemmenabdeckteil, an dem über ein Scharnier ein Verschlussteil gekoppelt ist, bei geschlossener Klemme, sowie

Figur 8:

eine schematische Teilansicht des Installationsschaltgerätes gemäß Figur 7, bei geöffneter Klemme in Betätigungsstellung,

Show it:

FIG. 1:

a schematic view of a service switching device according to the invention,

FIG. 2:

an enlarged view of the upper terminal terminal of the service switching device according to Figure 1 with attached terminal cover,

FIG. 3:

a schematic view in a terminal connection according to the figure 2, wherein the side wall of the terminal cover has been removed,

FIG. 4:

1 is a schematic view of the terminal connection space according to FIG. 1, with the terminal covers removed;

FIG. 5:

a further embodiment of a service switching device according to the invention with an insulating plate between the two terminal connections, as well

FIG. 6:

an insulating plate for insertion into an inventive installation switching device according to Figure 5.

FIG. 7:

a schematic partial sectional view of another embodiment of a service switching device according to the invention, which shows only the first, lower terminal connection, with a terminal cover, to which a closure member is coupled via a hinge, with the clamp closed, as well

FIG. 8:

1 is a schematic partial view of the service switching device according to FIG. 7, with the clamp open in the actuated position,

In the figures, the same or equivalent components or elements are each provided with the same reference numerals, even if they are designed in different embodiments in a slightly modified form.

At first, FIGS. 1 to 5 will be considered. An installation switchgear 1 according to the invention, see FIG. 1, has an insulating housing 3 formed from two housing parts 2, 2 'joined along a parting line 2a with a front front 4, rear front sides 5, 5', a fastening or connection side 6, front narrow sides 7, 7 ', which connect the front front side 4 with the rear front sides 5,5', rear narrow sides 8, 8 ', and two broad sides 9, of which in the view of Figure 1, only one is shown.

On one of the rear front sides 5 ', a conventional screw terminal accessible by a terminal opening 11 for connecting connecting conductors is mounted in a terminal connection space provided inside the housing 3.

At the second, opposite the screw terminal rear front side 5, a terminal connection space 18 is provided, which is open to the housing broad sides 9, to the rear narrow side 8 and to the rear front side 5. In the terminal connection space 18 there are two terminal connections 10, 10 'which are transverse to the broad side 9 next to each other, and are shifted in height above the attachment side 6 against each other. Seen from the attachment side 6, therefore, a first terminal connection 10 lies above a second terminal connection 10 '. Each of the two terminal connections 10, 10 'is fixed in position in the terminal connection space 18 and accessible for the connection of connection conductors 14 (see FIG. 3). Due to the openness of the terminal connection space on four sides, an increased flexibility for the connection direction of the connection conductor 14 is given.

Each of the two terminal connections 10, 10 'is covered by a terminal cover part 22, 22' assigned to it. This serves on the one hand to protect against contact of the current-carrying terminal connections, on the other hand - as will be shown below - it ensures a tool-free operation of the terminal connections.

Between the upper edge of the second terminal connection 10 'and the rear front side 5, the cover of the terminal connection space 18 pointing towards the interior of the device is formed by a section 8a of the housing wall.

The terminal cover 22, 22 'has substantially the shape of a box open on two sides (see also Figure 2, in which as a section of Figure 1, only the upper terminal terminal 10 is shown). Two sides of this box are formed by two opposing cover plates on which laterally two side surfaces 29, 29 'are formed, which cover the terminal connection 10,10' laterally in the direction of broadsides 9 out.

The first cover plate covers the associated terminal connection 10 or 10 'toward the rear front side 5 and has a connection surface 24 or 24', each with two connection openings 26 and 26 ', wherein a connection conductor can be connected through each of the connection openings 26, 26' ,

The second cover plate covers the associated terminal connection 10 or 10 'toward the rear narrow side 8 and has an externally accessible, manually operable pressure surface 230 or 230'. At the free edge of the second cover plate has a semi-open, tubular cavity with which they are in one connected to the rear narrow side 8 of the housing 3 pivot pin 232 or 232 'is rotatably mounted.

Of course, other types of rotatable mounting of the terminal cover on the housing are conceivable, for example, a rotatable rivet or a hinged hinge connection.

FIG. 1 shows an inventive installation switching device 1 with the terminal cover parts 22, 22 ', FIG. 4 shows a view of the terminal connection space 18 with terminal cover parts removed.

Each of the terminal connections 10 and 10 'is a so-called plug-in terminal. Its construction will be described with reference to FIG. 3, which shows the terminal connection 10 from FIG. 2, but with the side face 29 of the terminal cover part 22 removed, and with reference to FIG. 4, in which the arrangement of the two terminal connections 10 and 10 'in the terminal connection compartment 18 is shown. be explained. The reference numerals without apostrophe refer to the upper terminal terminal 10, the reference numerals with apostrophe refer to the lower terminal terminal 10 '. In the following text, the reference numerals without apostrophe are not mentioned because of the easier readability, however, drawn in the figures. Otherwise, the two terminal connections 10, 10 'are constructed essentially identically.

The terminal connection 10 comprises a busbar 102 and a clamping spring 12. The terminal connection 10 rests on a projection formed in the interior of the housing 3, which is not shown in more detail here, and is there by way of webs and pins, of which only one pin is shown here by way of example 106 is fixed in position in a known manner in the terminal connection space 18.

The busbar 102 includes a connection end 112 and a subsequent discharge region 114. At the connection end 112, it has a single window-like recess 116 with a support edge 118 and a clamping edge 120 opposite the support edge. The clamping edge 120 is located at the transition of the connection end 112 into the discharge region 114.

The clamping spring 12 has a support leg 212, with which it is supported on the support edge of the bus bar 102. The support can be made so that the support leg 212 has at its free end a raised edge, with which it includes the supporting edge for the purpose of supporting partially.

At the support leg 212, a curved piece 214 and thereon a clamping leg 216 connects. The conductor end 16 of a connecting conductor 14 is inserted from the side of the elbow 214 ago in the window-like recess 116 and is clamped between the clamping leg 216 and acting as an abutment clamping edge 120. The free end of the clamping leg 216 passes through the window-like recess 116th

The clamping leg 216 of the clamping spring 12 is longitudinally slotted along a slot 218, so that two independently clampable part springs 13a, 13b arise with which two connection conductors can be clamped independently of each other.

The busbar 102 has approximately a U-shaped basic shape, wherein the terminal end 112 forms the first U-leg, and the discharge region 114 is formed by a transverse web 220 and the second U-leg 222. At the free end of the second U-leg 222 a Aufkantung 224 is attached. At this Aufkantung 224 further connection conductors can be attached, with which the terminal connection 10 is connected to other modules within the switching device housing, such as the trigger assemblies. In particular, the connection conductors can be welded or brazed to this upstand, also a screwing or riveting is possible.

An illustrated design of the busbar has the advantage that the forces acting on the terminal connection 10 when inserting and releasing the connecting conductor are absorbed by this as a closed system, and thus forces on other elements of the service switching device, such as the housing can be reduced.

The busbar 102 can be produced cost-effectively and simply and in a wide variety of shapes, for example as a stamped and bent part in very large quantities.

By pressure on the pressure surface 230, the terminal cover 22 can be pivoted about the free edge of the second cover plate in the direction of the clamping spring 12 out. Falling out of the cover 22 is prevented by serving as a stop projection 234 on the housing wall.

At the first cover plate of the cover member 22, aligned with the clamping spring 12, at each of the connection openings 26 tubular, an insertion channel forming hollow body 28 are attached. These serve as a guide means for the introduced lead 14, and as spring actuation means. When the cover member 22 is pivoted by pressure on the pressure surface 230 about the pivot pin 232 in the direction of the clamping spring 12, the hollow body 28 press the clamping leg 216 of the clamping spring 12 away from the clamping edge 120 of the bus bar 102, so that between the clamping edge 120th and the clamping leg 216 space for inserting the stripped terminal conductor end 16 of the connecting conductor 14 is formed. FIG. 3 shows this state.

If the pressure surface 230 of the cover 22 is released again after insertion of the connection conductor end, then the clamping leg 216 of the clamping spring 12 presses the covering part 22 outward again due to its spring force via the hollow body 28 and at the same time clamps the end 16 of the connection conductor 14 against the clamping edge 120 the window-like recess 116.

The introduction of leads with rigid leads ends is of course possible without pressing the terminal cover. For a rigid connection conductor end can bend the corresponding part - clamping spring 13a or 13b itself when inserting. However, even with rigid terminal conductor ends for removing the connecting conductor, an operation of the terminal cover is required.

In the illustrated embodiment, two connection openings 26 are present in the connection surface 24 of the cover part 22, and behind each connection opening 26 is integrally formed on the connection surface a tubular hollow body 28 as a guide means for the connection conductor and spring action means (in the illustration of Figure 3 is only one of the hollow bodies 28 visible). Each connection opening 26 and each guide means 28 is one of the two partial clamping springs 13a, Assigned to 13 b, as they are caused by the slot 218 in the clamping spring 12. So if two conductors are to be clamped to a terminal connection, a conductor 14 is inserted through each of the two connection opening 26 and clamped by one of the partial clamping springs 13a, 13b. The separation and guidance of the connection conductors 14 takes place in the hollow bodies 28 serving as guide means for the connecting conductors 14, thus no separate guiding or separating devices are required at the terminal connection. In particular, it is not necessary to divide the recess 116 into two receiving spaces by means of a web.

The terminal connection 10 can be made very simple and narrow. In this way, two terminal connections can be installed side by side in an installation switching device with a standard module width, without the two terminal connections having to overlap. This is advantageous, for example, if one of the two terminal connections of one phase and the other, adjacent terminal connection is assigned to the neutral conductor. Then it is particularly important that no electrical connection between the two terminal connections can occur. If the terminal connections were not designed according to the invention, they would have to partially overlap in order to fit next to one another in an installation switchgear housing of a standard module width. As a result, there is a risk of electrical contact between the two terminal connections. The inventive arrangement of the two terminal connections a short circuit between the two terminal connections is reliably avoided even with adjacent terminal connections in a housing with a standard - module width.

By the spring force of the clamping spring 12, the cover member 22 is pressed in the state of rest to the outside against the projection 234, so that the cover always assumes a defined position in the idle state.

The cover thus fulfills two functions: once the functions of the leadership of the connection conductor and the second, the function of the spring actuating tool. Without external actuating tool for the clamping spring, both rigid and flexible conductor ends can be clamped with the device according to the invention and also removed again from the terminal, namely at two terminal connections arranged next to one another.

Of course, in the cover 24, for example in the pad 24 or in the pressure surface 230 also an additional slot could be present through which then an external tool for actuating the clamping spring 12 could be inserted therethrough.

In the pad 24 a test opening 236 is further attached. Through this test opening, the clamping spring 12 can be electrically contacted by means of a test probe.

In the embodiment shown in Figures 1 and 3, the terminal surface 24 of the cover 22 extends inclined to the rear front side 5. The guide means 28 are approximately perpendicular to the pad 24. The inclination angle at which the terminal conductor 14 is inserted into the terminal, so determined by the inclination angle of the pad 24. An embodiment is also conceivable in which 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 inclination angle at which the leads 14 are inserted into the clamp is determined by the inclination angle of the guide means 28 opposite to the pad 24.

The cover 22 can be made very cheap as an injection molded plastic part in an injection process.

FIG. 5 shows a further embodiment of an installation switching device according to the invention, in which an insulating plate 244 extending parallel to the broad sides is inserted between the two terminal connections 10, 10 '. FIG. 6 shows a particular embodiment of such an insulating plate 244. This consists essentially of two parallel plates 247, 248, with different lengths, which are connected at a free end by a web 249, so that a total of a U-shape with two different length legs is formed. The insulating plate 244 is inserted between the two terminal connections 10 and 10 'so that the longer of the two plates 247 cover the upper terminal terminal 10 and the shorter of the two plates 248 cover the lower terminal terminal 10' toward the center of the service switching device. In addition, pins 250 are still attached to the plates 247, 248, with which the insulating plate 244 in corresponding grooves on the Inside the housing parts 2, 2 'engages and thereby immovably between the two terminal terminals 10,10' is held.

By using an insulating plate 244 according to FIG. 5, a contact and thus an electrical contact between the two terminal connections 10, 10 'are prevented even more reliably. In addition, the insulating plate acts mechanically stabilizing, for example, it prevents slippage of the terminal connections 10, 10 'transverse to the broad side 9 into the interior of the switching device into it.

Furthermore, in the embodiment according to FIG. 5, an adjustment opening 246 is introduced above the lower terminal connection 10 'in the section 8a of the housing wall. Through this can be intervened from the direction of the terminal connection space forth with a tool inside the switching device, for example, to access a nearby there in the adjustment hole 246 adjusting means, such as a setting screw to access.

The embodiments shown illustrate the invention by way of example. Under no circumstances should they limit the invention to the embodiments shown there. Thus, it is also conceivable, for example, to place the two terminal connections without offset, that is to say in relation to the fastening side 6, at the same height next to one another. The specific embodiment of the terminal cover parts 22, 22 'is also not limited to the box shape shown. In particular, the second cover plate could be longer than shown. Overall, the terminal connections 10,10 'could also be arranged at a different point on the rear narrow side 8, for example oriented even further in the direction of the fastening side 6.

The invention has been explained above the example of a service switching device in shell construction, in which two housing shells are joined together along a parting line parallel to the broad sides. Of course, the invention can also be realized on a service switching device in base construction, in which the housing is assembled from two parts along a parting line parallel to the mounting side.

Likewise, embodiments of installation switching devices according to the invention are conceivable in which no additional screw terminal connection is provided, but the exclusively inventive, tool-free terminal connections have. The terminal connections could also be designed as spring tension or cutting clamp connections.

Now, FIGS. 7 and 8 are considered.

FIG. 7 shows a partial sectional view of the terminal connection space 18 of another service switching device 1 according to the invention. Only the first, lower terminal connection 10 is shown. The second, upper terminal connection 10 'is designed accordingly, but with a shortened distance surface of its associated second terminal cover.

The service switching device 1 has an insulating housing formed from two housing parts 2 with a front side 304, a rear front side 305, a mounting side 6, a front narrow side 7, a rear narrow side 8, and two broad sides 9, of which in the view of Figure 1 only one, lying in the drawing plane, is shown.

The terminal connection space 18 is laterally, ie towards the broad side, limited by the housing broad sides 9 of the insulating housing 3.

Towards the front front side 304, an opening 20 of the terminal connection space 18 is formed through a recess in the rear front side 305 of the housing part 2, through which the terminal connection 10 fixed in position in the terminal connection space 18 is accessible for the connection of connection conductors 14. At the front narrow side 7, first a housing-side section 356 of the rear front side 305 connects. As a result, an opening 20 is formed on the rear front side 305 in the region between the end of the housing-side section 356 facing away from the front narrow sides 7 and the rear narrow side 8.

Due to a further recess on the rear narrow side 8 of the housing part 2, the opening 20 of the terminal connection space 18 extends over the abutting edges between the rear narrow side 8 and the rear front side 305 away still in the rear narrow side 8 inside. This has the advantage that increased flexibility is given for the connection direction of the connection conductor 14.

The terminal connection 10 described below essentially corresponds to the terminal connection already described above in FIGS. 1-6. It comprises a bus bar 102 and a clamping spring 312. The terminal connection 10 is fixed in position in the inside of the broad side 9 by means of webs 104 and pins 106, 108 in a manner known per se in the terminal connection space 18. The fixed in the terminal connection space 18 terminal terminal 10 is located in the region of the abutting edge between the rear narrow side 8 and the rear attachment side. 6

The busbar 102 of the terminal terminal 10 comprises a connection end 112 and a subsequent discharge region 114. At the connection end 112, it has a window-like recess 116 with a support edge 118 and a clamping edge 120 opposite the support edge 118. The clamping edge 120 is located at the transition of the connection end 112 into the discharge region 114.

The clamping spring 12 has a support leg 212, with which it is supported on the support edge 118 of the bus bar 102. The support can be made so that the support leg 212 has at its free end an upstand, with which it includes the support edge 118 for the purpose of supporting partially.

At the support leg 212, a curved piece 214 and thereon a clamping leg 216 connects. The conductor end of a connecting conductor (not shown here) is introduced from the side of the elbow 214 forth in the window-like recess 116 and is clamped between the clamping leg 216 and acting as an abutment clamping edge 120. The free end of the clamping leg 216 passes through the window-like recess 116th

The busbar 102 has approximately a U-shaped basic shape, wherein the terminal end 112 forms the first U-leg, and the discharge region 114 is formed by a transverse web 220 and the second U-leg 222. At the free end of the second U-leg 222 a Aufkantung 224 is attached. At this Aufkantung 224 further connection conductors can be attached, with which the terminal connection 10 is connected to other modules within the switching device housing, such as the trigger assemblies. In particular, the connection conductors of this upstand can be welded or brazed, also screwing is possible.

In the embodiment of a terminal connection, which is shown in FIG. 1, the upstand at the free end of the second U-leg 222 is extended to a discharge rail 226. The discharge rail 226 is thus positively connected to the second U-leg 222; it points approximately perpendicularly from this towards the window-like recess 116 and projects beyond it.

In this embodiment, a first partial clamping leg 217, which merges at a bending edge 219 in a second partial clamping limb 218 bent from the first partial clamping leg 217, initially adjoins the curved piece 214, so that the first and the second partial clamping legs 217 , 218 take an obtuse angle with each other. The opening of the obtuse angle points in the insertion direction of the connecting conductor, the bending edge 219 is located approximately in the middle of the clamping leg 216.

The opening 20 of the terminal connection space 18 is covered by a terminal cover part 22 pivotally connected to the housing part 2.

The terminal cover part 22 comprises a longitudinally extending in the direction of the rear narrow side 8, via a pivot pin 232 to the housing part 2 pivotally coupled first part body 322 and at its free end via a hinge 352 pivotally coupled closure member 354, which is approximately parallel to the rear front side 305th runs. To improve the mobility in the hinge 352 this is designed as a film hinge.

The first part body 322 includes a first cover plate 323 which covers the terminal connection space 18 in the lower part of the narrow side 8 adjacent to the attachment side 6 and which carries an approximately tubular counterpart to the hinge pin 232 with which it is pivotally coupled to the hinge pin is. The first cover plate 323 has an externally accessible, manually operable pressure surface 330.

In the vicinity of the free end of the pressure surface 330, the first cover plate 323 is connected via a pointing into the housing intermediate piece 325 with a spacer surface 338, which is also parallel to the rear narrow side 8 in the direction extends the front side 305 and covers the terminal connection space 18 in the upper part of the narrow side 8 adjoining the rear front side 305.

At the free end of the spacer surface 338 is the already mentioned film hinge 352 with the closure part 354 pivotally coupled thereto.

This is a plate which at least partially overlaps at its free end with the housing-side part 356 of the rear front side 305. The closure part 354 and the housing-side part 356 of the rear front side thus together form the rear front side 305.

At its free end, the closure member 354 carries laterally, in the direction of the broad sides 9 facing, projecting pins 358. In the housing near the housing-side part 356 of the rear front 305 a backdrop-like guide 360 is mounted, in such a way that the pins 358 included in the guide 360.

Now, if the terminal cover 22 is pivoted by pressure on the pressure surface 330 in the direction of the device interior, the closure member 354 is slid behind the housing-side part 356 of the rear front side 305 and guided by the slide-like guide 360 parallel to this. The angle between the closure part 354 and the spacer surface 338 changes.

Thus, in the closed position according to FIG. 7, the closure part 354 and the spacer surface 338 form an acute angle with one another, which is opened into the interior of the housing. In the position shown in Figure 2, when the terminal cover member 22 is pivoted into the housing interior, the closure member 354 and the spacer surface 338 form an obtuse angle with an opening into the housing interior.

Upon actuation of the terminal cover member and concomitant pivoting about the pivot pin 232, the closure member 354 and the spacer surface 338 also pivot against each other about the film hinge 352.

As a result of the attachment of the film hinge between the closure part 354 and the spacer surface 338, the closure part 354 can thus save space behind the housing-side part 356 of the rear front side 305 in order to save space.

The intermediate piece 325 has an outwardly directed connection surface 324. In the connection surface 324, at least one connection opening 26 is present. Starting from the connection opening 26, the intermediate piece 325 is penetrated by a tubular recess 28 which, starting approximately perpendicularly from the connection surface 324, penetrates the intermediate piece 325 and thus serves as guide means for a connection conductor to be connected to the terminal connection 10.

The connection conductor is guided through the connection opening 26 in the terminal cover part 22 and, after leaving the tubular recess 28, strikes the clamping leg 216 of the clamping spring 312.

If the terminal conductor is a rigid conductor, then by means of the terminal conductor alone the clamping leg 216 of the clamping spring 312 can be pushed away from the clamping edge 120 so far that the terminal conductor between the free end of the clamping leg 216 and the clamping edge 120 in the window-like recess 116 inserted and clamped is.

In a flexible connection conductor, the window-like recess 116 must first be opened in another way.

This is done by pivoting the terminal cover 22nd

In the vicinity of the tubular recess 28, the terminal cover member 22 carries on the intermediate piece 325 a directed towards the clamping leg 216 toward nose 30, which serves as a spring actuating means.

The nose 30 can of course also be other protruding components or components, in particular the function of the nose 30 could also be formed by a collar which surrounds the outlet opening of the tubular recess 28.

Due to the restoring spring force of the clamping leg 216 of this presses the nose 30 and thus the terminal cover 22 to the outside.

By pressing on the pressure surface 330 or on the spacer surface 338, the terminal cover member 22 is pivoted inwardly, and via the nose 30 of the clamping leg 216 so far pushed away from the clamping edge 120 that the window-like recess 116 is free for the insertion of the connecting conductor, see Figure 8.

The nose 30 is formed on the terminal cover 22 and formed so that they act upon the pivoting of the cover against the clamping spring opening this close to the bending edge 219.

Due to their orientation in the way that they act upon opening the clamping spring near the bending edges opening during pivoting of the cover, less force is required in the opening operation of the terminal cover, with a consistently large opening area in the clamping window.

In a specific example, the first and second partial clamping legs 217, 218 form an angle of about 160 °. Compared to an otherwise unchanged clamping spring with straight, unbent clamping leg 216 halves the insertion force of the angle, the operating force at maximum terminal opening.

Accordingly, the procedure for releasing a clamped connection conductor. Pressure on the terminal cover 22 releases in the manner described above, the deadlock between the clamping leg 216 and the connecting conductor, so that it can be pulled out of the window-like recess 116. Due to the above-described kinked design of the clamping leg 216 and the actuating force for releasing the connecting conductor is much lower.

Accordingly, the procedure for releasing a clamped connection conductor. Pressure on the terminal cover 22 releases in the manner described above, the deadlock between the clamping leg 216 and the connecting conductor, so that it can be pulled out of the window-like recess 116.

Alternatively, the opening movement of the terminal cover member 22 may also be effected by a commercially available slotted or Phillips screwdriver 364. For this purpose, it is placed on the spacer surface 338 at an acute angle into a receptacle opening 350 (slotted, cross-shaped or spherical recess) which is suitable for receiving, and the clamp is opened by a pressure movement with the screwdriver 364.

Although only one connection opening 26 and only one tubular recess 28 is shown in the illustration according to FIGS. 7 and 8, it is of course also possible to provide two or more such connection openings and recesses for receiving and connecting a plurality of connection conductors in the intermediate piece 325. All connected connection conductors can be connected with a common clamping spring via their clamping legs 216. Upon actuation of the terminal cover 22 then all connected conductors are released simultaneously and can be solved simultaneously.

The terminal cover part 22 with the first part body 322, the hinge 352 and the closure part 354 consists in a further embodiment, for which, however, the same figures 7 and 8 apply as schematic drawings, of two material components with different mechanical properties.

These are connected together in a two-component injection molding process.

The result is a hard / soft connection. The hard component is the main ingredient. From her, the first part of body 322 is made. It serves to transmit the actuating forces to the clamping spring 312 and thereby prevent or at least minimize bending of the component.

In the region of the hinge 352 and the closure part 354, the soft component is used.

This allows easy hinge movement required to allow the above-described angle change of the angle between the closure member 354 and the first sub-body 322 to be easily adjusted upon actuation of the terminal cover member 22.

In this embodiment, the hinge 352 need not necessarily be a living hinge. Because the mobility of the hinge is ensured by the choice of a flexible material in the hinge area, not only by the thickness of the hinge.

A flexibility of the closure part 354 further contributes to this, when it is in the slide-like guide 360 in the direction of the front narrow side. 7 shifted parallel to the rear front side 305, could also bend something in itself, and thus can rest even lighter and closer to the front narrow side 305.

Overall, this leads to a very tight guidance of the closure part 354 on the rear front side 305 and thus to a large space saving when pivoting the terminal cover part 322.

LIST OF REFERENCE NUMBERS

1

Service switching device

10, 10 '

Screwless terminal connection

102, 102 '

conductor rail

104

web

106

spigot

108

spigot

11

Opening for screw terminal

110

head Start

112, 112 '

terminal end

114, 114 '

discharge area

116, 116 '

Window-like recess

118

supporting edge

12, 12 '

clamping spring

120, 120 '

clamping edge

13a, b

partial spring

14

connecting conductors

16

Stripped connection conductor end

18

Terminal chamber

2

Housing part, housing

2 '

housing part

20

Terminal chamber opening

212

support legs

212 '

support legs

214

elbow

214 '

elbow

216

clamping leg

216 '

clamping leg

217

First part clamping leg

218

Second part clamping leg

2181 '

slot

2181

slot

219

bending edge

22

Cover part, terminal cover part

22 '

Cover part, terminal cover part

220

crosspiece

222

Second U-thigh

224

backsplash

226

discharge bar

228

backsplash

230

print area

230 '

print area

232

pivot pin

232 '

pivot pin

234

head Start

234 '

head Start

236

test opening

236 '

test opening

238

Distance area

24

terminal area

24 '

terminal area

240

second control surface

242

Insulating web

244

insulation

246

insertion opening

247, 248

plate

249

web

26

port opening

26 '

port opening

28

Guide means, tubular recess

29, 29 '

side surface

2a

parting line

3

casing

30

Spring actuator, nose

304

Front front

305

Rear front

312

clamping spring

322

First part body

323

First cover plate

324

terminal area

325

connecting piece

330

print area

338

Distance area

350

engagement opening

352

hinge

354

closing part

356

Housing-side part of the rear front

358

spigot

360

Sliding guide in the inner broadside

364

screwdriver

4

Front front

5

Rear front

6

mounting side

7

Front narrow side

8th

Rear narrow side

8th'

Rear narrow side

8a

Part of the housing wall

9

broadside

Claims (24)

Installation switching device (1) with a housing (3), with a front (4) and rear (5) front, a mounting side (6), front (7) and rear (8) narrow sides and broadsides (9), and with two screwless Terminal connections (10, 10 ') each having at least one clamping spring (12, 12') for connecting connecting conductors (14) which are fixed in position in a terminal connection space (18) of the housing (3), characterized in that the terminal connection space (18) to the housing broad sides (9) and to the front side is open, that each terminal connection (10, 10 ') is covered by a associated with him, pivotally connected to the housing (3) terminal cover part (22, 22'), which has a connection surface (24, 24 ') with a number of connection leads (14) corresponding number of connection openings (26, 26') and at each connection opening (26, 26 ') integrally formed guide means (28, 28') for the connection conductor (14), which further two p side surfaces (29, 29 ') which cover the terminal connection (10, 10') laterally in the direction of the broad sides (9). Installation switching device according to claim 1, characterized in that on each cover (22, 22 ') spring actuating means (30, 30') are integrally formed and formed so that upon pivoting of the cover (22, 22 ') against the respective clamping spring (12, 12 ') act on these opening. Installation switching device according to claim 2, characterized in that the guide means (28, 28 ') are tube-like, an insertion channel forming hollow body, which simultaneously serve as spring actuating means (30, 30') for the clamping spring (12). Service switching device according to claim 1 or 2, characterized in that the two terminal connections (10, 10 ') are shifted transversely to the broad side (9) side by side and in height above the attachment side (6) against each other. Service switching device according to claim 1, characterized in that each terminal cover (22, 22 ') by its associated clamping spring (12, 12') against the insertion direction of the external connection conductor (14) resiliently and against the clamping spring (12, 12 ') pressed is. Service switching device according to claim 5, characterized in that each cover part (22, 22 ') by its associated clamping spring (12, 12') against a as Stop serving projection (234, 234 ') of the housing wall (2) is resiliently acted upon. Service switching device according to one of the preceding claims, characterized in that each terminal cover part (22, 22 ') has an externally accessible, manually operable pressure surface (230, 230'). Service switching device according to one of the preceding claims, characterized in that the terminal connection space (18) between the two terminal connections (10, 10 ') comprises a parallel to the broad sides (9) extending insulating plate (244). Service switching device according to one of the preceding claims, characterized in that the terminal cover part (22, 22 ') has a test opening (236, 236') for electrical contacting of the terminal connection (10, 10 '). Service switching device according to one of the preceding claims, characterized in that in the vicinity of a terminal cover (22 ') an insertion opening (246) is introduced into the rear housing wall. Service switching device according to one of the preceding claims, characterized in that the terminal cover part (22, 22 ') has an engagement opening for an actuating tool. Installation switching device according to claim 1, characterized in that with the free, the front facing end of a first part body (322) of each terminal cover (22, 22 ') pivotally a closure part (354) is coupled, which the terminal connection space (18) on the front ( 305) in cooperation with a housing-fixed front side end (356) covered, wherein upon actuation of the terminal cover (22, 22 '), the closure part (354) with the housing-fixed front side end (356) overlaps at least partially. Installation switching device according to claim 12, characterized in that the closure part (354) by means of a hinge (352) with the terminal cover (22, 22 ') is coupled. Installation switching device according to claim 12, characterized in that the closure part (354) via laterally projecting guide pins (358) in a housing-fixed, slide-like guide (360) parallel to the front side (304, 305) is displaceably guided. Installation switching device according to claim 12, characterized in that the terminal cover (22) following the connection surface (324) carries a spacer surface (338) which forms in the region of the narrow side (8) the terminal cover side closure of the terminal receiving space (18), wherein the closure part (354) is pivotally coupled to the front facing the end of the spacer surface (338). Installation switching device according to claim 12, characterized in that the closure part (354) at least in the region of the coupling with the first part body (322) consists of a material having other mechanical properties than the first part body (322) of the terminal cover (22). Installation switching device according to claim 13, characterized in that the hinge (352) and the closure part (354) in the region of the hinge (352) consists of a material which has different mechanical properties than the first part body (322) of the terminal cover (22). Installation switching device according to claim 15, characterized in that the spacer surface (338) is designed rigid, and that the closure part (354) at least in the region of the coupling with the spacer surface (338) softer than the spacer surface (338) is executed. Service switching device according to one of claims 17 to 19, characterized in that the terminal cover part (22) with the closure part (354) coupled thereto is produced in a two-component injection molding process. Service switching device according to claim 1, each with a compression spring acting on the conductor end clamping spring (12, 12 ') for clamping a conductor end (16) to an abutment, wherein - Each terminal connection (10, 10 ') comprises a busbar (102, 102') with a connection end (112, 112 ') and an adjoining discharge region (114, 114'), - Each busbar (102, 102 ') at the connection end (112, 112') has a window-like recess (116, 116 ') with a support edge (118) and one of the support edge (118) opposite clamping edge (120, 120 ') at the junction of the terminal end (112, 112') in the discharge region (114, 114 '), - Each clamping spring (12, 12 ') has a support leg (212, 212'), with which it is supported on the support edge (118) of the busbar (102, 102 '), and - An arcuate piece (214, 214 ') and a clamping leg (216, 216') adjoins the support leg (212, 212 '), so that the conductor end (16) between the clamping leg (216, 216') and the clamping edge (120, 120 ') can be clamped as an abutment. Service switching device according to claim 20, characterized in that adjoining the elbow piece a first part-clamping leg, which merges at a bending edge in a bent from the first part-clamping leg second part-clamping leg, so that the first and the second part-clamping leg blunt Occupy angles with each other, the opening points in the insertion direction of the connecting conductor. Installation switching device according to claim 20, characterized in that each busbar (102, 102 ') has approximately a U-shape, wherein the terminal end (112, 112') forms the one U-leg, and the diverting region (114, 114 ') is formed by a transverse web (220) and the other U-legs (222): Service switching device according to claim 22, characterized in that at the free end of the other U-leg (222) a discharge bar is formed, which is approximately perpendicular to the other U-leg (222) and the clamping edge (120, 120 ') opposite side the terminal end (112, 112 ') is supported on the discharge rail. Service switching device according to claim 20, characterized in that the clamping leg (216, 216 ') of each clamping spring (12, 12') is slotted longitudinally, so that in each case two independently clampable part springs (13a, 13b) arise, each having a connection opening (26, 26 ') in each terminal cover (22, 22') are assigned.

Images