DE102006049772B4 - Service switching device - Google Patents

Abstract

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 with at least a clamping spring (12, 12 ') for connecting connection 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 broadsides (9) and open to the front, that each terminal connection (10, 10 ') by an associated with him, pivotally connected to the housing (3) covered terminal cover part (22, 22 ') is covered, which is a Terminal surface (24, 24 ') with one of the number of connection leads (14) to be connected corresponding number of connection openings (26, 26 ') and on each connection opening (26, 26 ') molded guide means (28, 28 ') for the connecting conductor (14), which further comprises two side surfaces (29, 29 ') which laterally in the direction of the terminal connection (10, 10') cover the broadsides (9).

Description

The The invention relates to a service switching device with a housing and with two screwless terminal connections, each with at least a clamping spring for connection connecting leads which are fixed in position in a terminal connection space of the housing is, according to the generic term of claim 1.

One generic installation switching device comprises inside his case at least one contact point with at least one fixed and one movable contact piece, over the a current path leading from an input terminal to an output terminal open and can be closed. The contact point will be in general operated by a derailleur with Verklinkungsstelle. A generic service switching device can continue triggering devices include, for example, a thermal release or a magnetic Instantaneous release, when a short circuit or fault current occurs in the current path act on the contact point or the rear derailleur, so that the contact point opened becomes.

at some generic service switching devices is next to the live pole also the neutral conductor connected. In such devices is it then required that on the terminal connection side two conductors close to each other are, but at the junction of the installation switching device electrically stay isolated from each other.

to Connection with external connection conductors are in generic service switching devices in addition Screw terminals and screwless terminal connections used. As clamping elements can Plug-in terminals or spring-type terminals are used. Basically can these connecting significantly simplify connection conductors, but are well known today Service switching devices with screwless terminal connections with 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.

The DE 10 2004 062 850 B3 shows a generic service switching device, which has only a single screwless terminal connection.

The EP 1 641 079 A1 shows a generic service switching device with pivotally mounted actuators, which are separately formed parts.

It Therefore, the object of the present invention to provide a generic service switching device, in which two screwless terminal connections on one side of the service switching device in one common terminal connection space are assigned to each other and the terminal connections on simple and inexpensive Fashion is designed so that the tool-free insertion and Removal of connecting cables is possible.

The Task is solved by a generic service switching device with the Characteristic features of claim 1. According to the invention thus is the terminal connection space to the enclosure sides and to the front open, and the two terminal connections are transverse to the broad side next to each other and in height above the Fixing side shifted against each other, and each of the two terminal connections is by a pivotally connected to the housing terminal cover covered. Each terminal cover part has a connection surface one of the number to be connected Connection conductor corresponding number of connection openings and molded on each connection opening guide means for the Connection lead on. Furthermore, each terminal cover part has two faces on, with the attached terminal cover part assigned to him Cover the terminal connection laterally in the direction of the broad sides.

According to one particularly advantageous embodiment The invention relates to the terminal cover spring actuation means formed and designed so that they are when pivoting the cover against the clamping spring this opening apply.

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 terminal edge against which the clamping spring clamps the connection lead to be connected, and the terminal cover part. 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 one particularly advantageous embodiment are the two terminal connections as well in height above the Mounting side shifted from each other and thus offset. On This way, the air and creepage distance between the two Klemmanschlüssen extended, whereby the electrical insulation continues between the two terminal connections is secured.

• – 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 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 being kept apart at the same time. Thus, even when several conductor ends to be clamped, an individual insertion of each individual conductor end is possible without further measures being required on the side of the clamping spring or the busbar to keep the individual conductors apart.
• - By the same time molded on the terminal cover spring action means the terminal cover is also 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.

One inventive installation switching device has Overall, the advantage that on one connection side and in one Terminal connection compartment Two terminal connections in a simple way and from the outside very easily accessible are mounted side by side, wherein the two terminal terminals electrically isolated from each other and independent from each other without tools operable are. Both for insertion as well as for removal of leads with fixed and flexible Terminal end, into or out of the terminal connection is no external Tool needed. The terminal connections are easy to set up with a few prefabricated components

According to one advantageous embodiment of the Invention is each terminal cover by its associated Clamping spring counter to the insertion direction the external terminal conductor spring loaded and against this Clamping spring can be pressed. there can in a particularly advantageous manner the terminal cover by the associated clamping spring against a serving as a stop projection the housing wall be resiliently acted upon. Thus, the terminal cover is through the resilient loading of its associated clamping spring in one defined starting position held. The starting position is while the closed position the clamping spring.

According to one particularly advantageous embodiment The invention relates to the spring actuating means through the at each connection opening molded guide means for the Connection conductor formed. This can be realized, for example, by that the guiding means for the Connection ladder tubular, from the inside of the cover to the clamping spring facing and while an insertion channel for the Connecting conductors forming hollow body are. The terminal cover can then be made particularly simple and can be produced for example as a cost-effective injection molded part.

to printing operation the terminal cover can be provided that the terminal cover one from the outside accessible, manually operable print area having.

A Another advantageous variant of the invention is characterized in that that the terminal connection space between the two terminal connections a includes parallel to the broad sides extending insulating. Thereby becomes a touch and thus an electrical contact between the two terminal connections, for example between the two busbars, avoided. In addition, the insulating acts mechanically stabilizing.

Around in the operating state, ie after the final installation of the service switching device on simple way for a voltage tester To ensure access to the terminal connection, the terminal cover a test opening for one have electrical contact 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, during production or in the installed state of the assembled switchgear with a Tool to engage the interior of the switching device to access an arranged there in the vicinity of the adjustment opening Justagemittel.

Regarding the spatial Arrangement of the connection surface of the terminal cover with respect to the front of the housing and the guide against the terminal area sees a possible embodiment the invention that the connection surface of the terminal cover runs approximately parallel to the rear front and the guide means across from the connection surface of the terminal cover are inclined. The angle of inclination for the guide means is chosen, for example, after that the connection conductor when installing a series installation of a service switching device according to the invention, for example in a distribution box, stay accessible and the connection conductors not be bent too much upwards.

A sees further advantageous embodiment in this regard before that the pad of the Terminal cover opposite the rear front inclined and the guide channels in approximately perpendicular to the terminal area run. The angle of inclination under which the connection conductors are relative to Spring clip introduced will be in this embodiment determined by the inclination angle of the guide channels.

It would be natural too a combination of the two options shown above conceivable in the both the interface the terminal cover opposite the rear front, and the guide channels inclined relative to the connection surface are.

Around on request, for reasons the redundancy, in addition the operation to allow the spring clamp by an external tool can according to a another embodiment the service switching device according to the invention the Terminal cover part an engagement opening for a operating tool exhibit. Through this intervention opening through can then with the operating tool, For example, a screwdriver, the clamping spring in its open position be spent.

Regarding one advantageous embodiment of the terminal connections includes each terminal connection an installation switching device according to the invention a as a compression spring acting on the conductor end clamping spring for clamping the conductor end to an abutment, wherein the clamping connection a Busbar with a connection end and an adjoining discharge area includes. The busbar has a window-like at the connection end Recess with a supporting edge and one of the support edge opposite clamping edge at the transition of the connection end in the discharge area. The clamping spring points continue a support leg on, with which they are at the supporting edge supported the busbar is. On the support leg includes a bow piece and a clamping leg, so that the conductor end between the clamping leg and the clamping edge can be clamped as an abutment is. The conductor end is from the side of the elbow insertable into the window-like recess.

A preferred embodiment is characterized in that the busbar approximately in a U-shape , wherein the terminal end forms the one U-leg, and the discharge area through the cross bar and the other U-leg is formed. It can at the free end of the other U-leg a backsplash for attaching additional power conductors to the interior of the service switching device to lead, be provided.

According to one another embodiment formed at the free end of the other U-leg and a discharge be. The discharge bar can be approximately perpendicular to the other U-leg run and the clamping edge opposite side of the connection end can be supported on the discharge rail be.

One Another advantage of a service switching device according to the invention lies in that the dissipation region of the busbar to the electrical Contacting be used in the calibration of the bimetallic strip can. In previously known installation switching devices is the point of contact for the Calibration of the bimetallic strip in another place, outside the access area of the terminal connection, and is not above the Terminal connection accessible. Since the calibration of the bimetallic strip is only in fully assembled Condition can take place in known service switching devices following the calibration the separate access openings to the calibration contacts covered by additional cover parts become.

This is not in a service switching device according to the invention necessary. It will therefore be opposite both known from the prior art installation switching devices Mounting parts - namely the additional Cover parts -, as well as manufacturing steps saved during assembly, so that through the resulting simplification of assembly another Advantage of the service switching device according to the invention results.

An inventive installation switching device can be completely assembled, except for the terminal cover parts. Now - by means of electrical contact through the opening of the terminal connection thereafter - the calibration of the bimetallic strip is carried out by using the discharge area of the busbar 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.

One Another advantage is given by the fact that due to the design of the invention terminal connections a service switching device according to the invention are designed so that they are only a small one even with very narrow external dimensions have electrical resistance. This is achieved by that the busbar in the discharge area between the clamping edge and the point An additional conductor is attached to the interior of the unit Service switching device leads, a uniform width having.

The Busbar has only a single window-like recess to Also accommodates several connection conductors. The individual connection conductors, which are received in the one recess of the busbar are through the connection openings and the guidance means associated with them kept apart. This is an individual introduction and Remove multiple connection conductors in a single recess possible, without that the individual connection conductors influence each other.

Yet better is this possible in a further embodiment of the invention, in which the clamping leg of the clamping spring is slotted longitudinally, so that two independent mutually clampable part springs arise, each having a connection opening in the terminal cover and thus one each to be connected Connection conductors are assigned.

at the previously known installation switching devices is at the terminal connections for each Connecting conductor provided a separate recess in the busbar, separated by a central pier. This will make the terminal connections so ready that when installing two terminal connections in a service switching device one Standard module width the two terminal connections partially overlap have to. This complicates the required electrical insulation between the both terminal connections according to the state of the technique.

By the invention makes it possible two terminal connections side by side in a service switching device of a standard module width to use can, which are electrically isolated from each other and do not overlap have to. This will cause electrical crosstalk safely avoided between the two adjacent terminal connections. Under a standard module width is in the German standard DIN-EN 50022 for the division unit of DIN rail mounted devices fixed width of 17.5 mm understood.

Further advantageous embodiments and improvements of the invention and Further advantages can be found in the dependent claims.

Based of the drawings, in which 2 embodiments the invention are shown, the invention and others advantageous embodiments and improvements of the invention explained in more detail and to be discribed.

It demonstrate:

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

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

3 : a schematic view in a terminal connection according to 2 with the side wall of the terminal cover removed,

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

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

6 : an insulating plate for insertion into an inventive installation switching device according to 5 ,

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

An inventive installation switching device 1 , please refer 1 , has one of two along a parting line 2a assembled housing parts 2 . 2 ' formed Isolierstoffgehäuse 3 with a front front 4 , rear fronts 5 . 5 ' , a fastening or connection side 6 , front narrow sides 7 . 7 ' that the front front 4 with the back fronts 5 . 5 ' connect, rear narrow sides 8th . 8th' , as well as two broadsides 9 , of which in the view 1 only one is shown.

On one of the back fronts 5 ' is in egg inside the case 3 a mounted terminal compartment one through a terminal opening 11 accessible, conventional screw terminal for connection of connecting conductors attached.

At the second, the screw terminal opposite rear front 5 , is a terminal connection space 18 provided, to the housing sides 9 , to the rear narrow side 8th and to the back front 5 is open. In the terminal connection room 18 are two terminal connections 10 . 10 ' existing, which transverse to the broadside 9 next to each other, and in height above the attachment side 6 are shifted against each other. From the attachment side 6 Seen from so is a first terminal connection 10 over a second terminal connection 10 ' , Each of the two terminal connections 10 . 10 ' is in the terminal connection space 18 fixed in position and for the connection of connection conductors 14 accessible (see 3 ). The openness of the terminal connection space on four sides provides increased flexibility for the connection direction of the connection conductors 14 given.

Each of the two terminal connections 10 . 10 ' is by an associated with him terminal cover 22 . 22 ' covered. 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 top edge of the second terminal connection 10 ' and the back front 5 is the cover of the terminal connection compartment, which points towards the interior of the device 18 through a section 8a the housing wall formed.

The terminal cover part 22 . 22 ' has essentially the form of a box open on two sides (see also 2 in which as a cutout the 1 only the upper terminal connection 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 the terminal connection 10 . 10 ' laterally in the direction of the broadsides 9 cover up.

The first cover plate covers the associated terminal connection 10 respectively 10 ' to the back front 5 down and has a connection surface 24 respectively 24 ' on, with two connection openings each 26 respectively 26 ' , wherein through each of the connection openings 26 . 26 ' a connection conductor can be connected.

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

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

The 1 shows an inventive installation switching device 1 with the terminal cover parts 22 . 22 ' , in 4 is a view of the terminal connection space 18 shown with remote terminal cover parts.

Each of the terminal connections 10 respectively. 10 ' is a so-called plug-in terminal connection. Its construction should be based on the 3 , which the terminal connection 10 out 2 , but with removed side surface 29 of the terminal cover 22 shows, and based on the 4 in which the arrangement of the two terminal connections 10 respectively 10 ' in the terminal connection space 18 is illustrated. The reference numbers without apostrophe refer to the upper terminal connection 10 , the reference numbers with apostrophe refer to the lower terminal connection 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 ' essentially identical.

The terminal connection 10 , includes a busbar 102 and a clamping spring 12 , The terminal connection 10 lies on one inside the case 3 formed projection, which is not shown here in detail, and is there by means of webs and pins, of which here only one pin 106 is shown, in a conventional manner in the terminal connection space 18 fixed in position.

The busbar 102 includes a connection end 112 and a subsequent derivation area 114 , At the connection end 112 it has a single window-like recess 116 with a supporting edge 118 and a clamping edge opposite the supporting edge 120 on. The clamping edge 120 is located at the junction of the terminal end 112 in the discharge area 114 ,

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

On the support leg 212 closes a bow piece 214 and a clamping leg 216 at. The leader 16 a connection conductor 14 is from the side of the bow piece 214 forth in the window-like recess 116 inserted and is between the clamping leg 216 and acting as an abutment clamping edge 120 clamped. The free end of the clamping leg 216 engages the window-like recess 116 ,

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

The busbar 102 has approximately a U-shaped basic shape, wherein the terminal end 112 forms the first U-leg, and the discharge area 114 through a crossbar 220 and the second U-leg 222 is formed. At the free end of the second U-leg 222 is an upstand 224 appropriate. At this upstand 224 Further connection conductors can be attached with which the terminal connection 10 is connected to other modules within the switchgear 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 when inserting and loosening the connecting conductor to the terminal connection 10 acting forces 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 For example, as a stamped and bent part in very large numbers can be produced inexpensively and easily and in a wide variety of shapes.

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

At the first cover plate of the cover 22 are aligned with the clamping spring 12 , at each of the connection openings 26 tubular, an insertion channel forming hollow body 28 appropriate. These also serve as guide means for the lead to be introduced 14 , and as spring actuators. When the cover part 22 by pressure on the printing surface 230 around the pivot pin 232 in the direction of the clamping spring 12 is pivoted back, so press the hollow body 28 the clamping leg 216 the clamping spring 12 from the clamping edge 120 the busbar 102 away, leaving between the clamping edge 120 and the clamping leg 216 Space for inserting the stripped terminal conductor end 16 of the connection conductor 14 arises. The 3 shows this condition.

If, after inserting the connection conductor end, the pressure surface 230 of the cover 22 is released again, so presses the clamping leg 216 the clamping spring 12 due to your spring force over the hollow body 28 the cover part 22 again outward 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. Because a rigid connection conductor end can during insertion of the corresponding part-clamping spring 13a respectively 13b bend yourself. However, even with rigid terminal conductor ends for removing the connecting conductor, an operation of the terminal cover is required.

In the illustrated embodiment are in the pad 24 of the cover 22 two connection openings 26 existing, and behind each connection opening 26 is located on the pad integrally formed a tubular hollow body 28 as a guide means for the connection conductor and as a spring actuating means (in the illustration 3 However, only one of the hollow body 28 visible, noticeable). Each connection opening 26 and every guide 28 is one of the two partial clamping springs 13a . 13b assigned as they pass through the slot 218 in the clamping spring 12 have arisen. So if two conductors are to be connected to a terminal connection, so will through each of the two connection opening 26 a leader 14 introduced and by each one of the partial clamping springs 13a . 13b clamped. The separation and management of the connecting conductors 14 happens in the as a guide for the connection conductor 14 serving hollow bodies 28 Thus, no separate guiding or disconnecting devices are required at the terminal connection. In particular, it is not necessary, through a web, the recess 116 into two recording rooms to divide.

The terminal connection 10 This makes it very easy and narrow. In this way, two terminal connections ne Install one another 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 becomes the cover part 22 in the state of rest to the outside against the projection 234 pressed, so that the cover always assumes a defined position in the idle state.

The Cover part fulfilled So two functions: once the functions of leadership of Connecting conductor and second, the function of the spring actuating tool. Without external operating tool for the Clamping spring can with the device according to the invention both rigid and flexible conductor ends pinched and also be taken out of the clamp again, namely two next to each other arranged terminal connections.

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

In the connection area 24 is still a test opening 236 appropriate. Through this test opening through the clamping spring 12 be electrically contacted by means of a test probe.

In the in the 1 and 3 In the embodiment shown, the connection surface extends 24 of the cover 22 inclined to the rear front 5 , The guiding means 28 are approximately perpendicular to the pad 24 , The angle of inclination with which the connecting conductor 14 is introduced into the terminal, so by the inclination angle of the pad 24 certainly. It is also an embodiment conceivable in which the connection surface 24 approximately parallel to the rear front 5 runs, and the guide means 28 opposite the connection surface 24 are inclined. Then the inclination angle with which the connecting conductors 14 be introduced into the terminal, by the inclination angle of the guide means 28 opposite the connection surface 24 certainly.

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

The 5 shows a further embodiment of a service switching device according to the invention, in which between the two terminal connections 10 . 10 ' a parallel to the broad sides extending insulating 244 is inserted. In the 6 is a particular embodiment of such an insulating plate 244 shown. This consists essentially of two parallel plates 247 . 248 , with different length, at a free end by a bridge 249 are connected, so that a total of a U-shape with two different length legs is created. The insulating plate 244 is so between the two terminal connections 10 and 10 ' used that longer of the two plates 247 the upper terminal connection 10 and the shorter of the two plates 248 the lower terminal connection 10 ' Cover towards the center of the service switching device. Additionally are on the plates 247 . 248 still cones 250 attached, with which the insulating plate 244 in corresponding grooves on the inside of the housing parts 2 . 2 ' engages and thus immovable between the two terminal connections 10 . 10 ' is held.

By using an insulating plate 244 according to 5 becomes a contact and thus an electrical contact between the two terminal connections 10 . 10 ' even safer prevented. In addition, the insulating acts mechanically stabilizing, for example, it prevents slippage of the terminal connections 10 . 10 ' across the broadside 9 into the interior of the switching device.

Furthermore, in the embodiment according to the 5 above the lower terminal connection 10 ' in the section 8a the housing wall an adjustment hole 246 brought in. Through this can be intervened from the direction of the terminal connection space forth with a tool inside the switching device, for example, to a nearby there in the Einstellöffnung 246 arranged adjustment 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. So it is also conceivable, for example, the two terminal connections uninserted, so based on the mounting side 6 in the same Height next to each other. The specific design 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 ' also at another point on the back narrow side 8th be arranged, about even further towards the attachment side 6 oriented.

The Invention has been described above using the example of an installation switching device in shell construction, at the two housing shells along one Parting line are joined in parallel to the broad sides, explained. Of course let yourself The invention also relates to a service switching device in base design realize where the case from two parts along a parting line is assembled parallel to the mounting side.

As well are executions conceivable by installation switching devices according to the invention, where no additional Screw terminal connection is provided, but exclusively inventive, tool-free Have clamping connections. It could the terminal connections as well be designed as Federzug- or cutting clamp connections.

1

Service switching device

2, 2 '

housing part

2a

parting line

3

casing

4

Front front

5

Rear front

6

mounting side

7

Front narrow side

8th, 8th'

Rear narrow side

8a

Part of the housing wall

9

broadside

10 10 '

screwless terminal connection

11

Opening for screw terminal

12 12 '

clamping spring

13a, b

partial spring

14

connecting conductors

16

stripped Connection wire end

18

Terminal chamber

22 22 '

cover, terminal cover

24 24 '

terminal area

26 26 '

port opening

28

guide means

29 29 '

side surface

30

Spring actuator

102

conductor rail

106

spigot

112 112 '

terminal end

114 114 '

discharge area

116 116 '

window-like recess

120 120 '

clamping edge

212 212 '

support legs

214 214 '

elbow

216 216 '

clamping leg

218 218 '

slot

220

crosspiece

222

second U-leg

224

backsplash

230 230 '

print area

232 232 '

pivot pin

234 234 '

head Start

236 236 '

test opening

244

insulation

246

insertion opening

247, 248

plate

249

web

Claims (19)

Installation switching device ( 1 ) with a housing ( 3 ), with a front ( 4 ) and rear ( 5 ) Front side, one fastening side ( 6 ), front ( 7 ) and rear ( 8th ) 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 ) located in a terminal compartment ( 18 ) of the housing ( 3 ) are fixed in position, characterized in that the terminal connection space ( 18 ) to the housing sides ( 9 ) and is open to the front, that each terminal connection ( 10 . 10 ' ) by an associated with him, pivotally connected to the housing ( 3 ) connected terminal cover part ( 22 . 22 ' ), which has a pad ( 24 . 24 ' ) with one of the number of connection conductors to be connected ( 14 ) corresponding number of connection openings ( 26 . 26 ' ) and at each connection opening ( 26 . 26 ' ) molded guide means ( 28 . 28 ' ) for the connecting conductors ( 14 ), which further comprises two side surfaces ( 29 . 29 ' ) having the terminal connection ( 10 . 10 ' ) laterally in the direction of the broad sides ( 9 ) cover. Installation switching device according to claim 1, characterized in that to each cover ( 22 . 22 ' ) Spring actuating means ( 30 . 30 ' ) are formed and designed so that they are when pivoting the cover ( 22 . 22 ' ) against the respective clamping spring ( 12 . 12 ' ) apply these opening. Installation switching device according to claim 2, characterized in that the guide means ( 28 . 28 ' ) are tubular, forming an insertion channel hollow body, at the same time as a spring actuating means ( 30 . 30 ' ) for the clamping spring ( 12 ) serve. Installation switching device according to one of claims 1 to 3, characterized in that the two terminal connections ( 10 . 10 ' ) across the broadside ( 9 ) next to each other and in height above the attachment side ( 6 ) are shifted against each other. Installation switching device according to claim 1, characterized in that each terminal cover part ( 22 . 22 ' ) by the associated clamping spring ( 12 . 12 ' ) contrary to the insertion direction of the external connection conductor ( 14 ) resiliently and against the clamping spring ( 12 . 12 ' ) is printable. Installation switching device according to claim 5, characterized in that each cover part ( 22 . 22 ' ) by the associated clamping spring ( 12 . 12 ' ) against a projection serving as a stop ( 234 . 234 ' ) the housing wall ( 2 ) is acted upon resiliently. Installation switching device according to one of the preceding claims, characterized in that each terminal cover part ( 22 . 22 ' ) an externally accessible, manually operable printing surface ( 230 . 230 ' ) having. Installation switching device according to one of the preceding claims, characterized in that the terminal connection space ( 18 ) between the two terminal connections ( 10 . 10 ' ) one parallel to the broadsides ( 9 ) extending insulating plate ( 244 ). Service switching device according to one of the preceding claims, characterized in that the terminal cover part ( 22 . 22 ' ) a test opening ( 236 . 236 ' ) for an electrical contacting of the terminal connection ( 10 . 10 ' ) having. Installation switching device according to one of the preceding claims, characterized in that in the vicinity of a terminal cover ( 22 ' ) an adjustment opening ( 246 ) is introduced into the rear housing wall. Installation switching device according to one of the preceding claims, characterized in that the connection surface ( 24 . 24 ' ) of the terminal cover part ( 22 . 22 ' ) approximately parallel to the rear front ( 5 ) and the guiding means ( 28 . 28 ' ) opposite the pad ( 24 . 24 ' ) of the terminal cover part ( 22 . 22 ' ) are inclined. Service switching device according to one of Claims 1 to 9, characterized in that the connection surface ( 24 . 24 ' ) of the terminal cover part ( 22 . 22 ' ) opposite the rear front ( 5 ) and the guide channels ( 28 . 28 ' ) approximately perpendicular to the pad ( 24 . 24 ' ). Installation switching device according to one of the preceding claims, each with a force acting as a compression spring on the conductor end clamping spring ( 12 . 12 ' ) for clamping the conductor end ( 16 ) on an abutment, wherein - the clamping connection ( 10 . 10 ' ) a busbar ( 102 ) with a connection end ( 112 . 112 ' ) and a subsequent derivation area ( 114 . 114 ' ), - the busbar ( 102 ) at the connection end ( 112 ) a window-like recess ( 116 . 116 ' ) with a supporting edge and a clamping edge opposite the supporting edge ( 120 . 120 ' ) at the junction of the terminal end ( 112 ) into the derivation area ( 114 ), - the clamping spring ( 12 ) a supporting leg ( 212 . 212 ' ), with which they at the support edge ( 118 ) of the busbar ( 102 ) is supported, and - to the supporting leg ( 212 ) a bow piece ( 214 . 214 ' ) and a clamping leg ( 216 . 216 ' ), so that the conductor end ( 16 ) between the clamping leg ( 216 ) and the clamping edge ( 120 ) can be clamped as an abutment. Installation switching device according to claim 13, characterized in that the conductor end ( 16 ) from the side of the elbow ( 214 ) ago in the window-like recess ( 116 ) is insertable. Installation switching device according to claim 14, characterized in that the busbar ( 102 ) has approximately a U-shape, wherein the terminal end ( 112 ) forms a U-leg, and the derivative region ( 114 ) by a crosspiece ( 220 ) and the other U-legs ( 222 ) is formed. Installation switching device according to claim 15, characterized in that at the free end of the other U-leg ( 222 ) an upstand ( 224 ) is provided for securing further current conductors. Installation switching device according to claim 16, characterized in that at the free end of the other U-leg ( 222 ) a discharge rail is formed. Installation switching device according to claim 17, characterized in that the discharge bar approximately perpendicular to the other U-leg ( 222 ) and the clamping edge ( 120 ) opposite side of the terminal end ( 112 ) is supported on the discharge rail. Installation switching device according to one of claims 13 to 18, characterized in that the clamping leg ( 216 ) of the clamping spring ( 12 ) is longitudinally slotted, so that two independently clampable part springs ( 13a . 13b ) arise, each having a connection opening ( 26 ) in the terminal cover part ( 22 ) assigned.