DE102010047170B4 - Installation switching device with a Steckklemmvorrichtung - Google Patents

Abstract

An installation switching device having a plug-in clamping device arranged in a housing (3), wherein the plug-in clamping device has at least one clamping connection frame (10) and a clamping spring element (12) with a clamping leg (216), and wherein a clamping connection frame (10) is formed by a first leg (224) conductively connected to a diverter leg (114) via a connecting leg (222), wherein between the three legs (222, 114, 224) a clamping connection space (18) is provided, and wherein between the first leg (224 ) and the Ableitschenkel (114) having a clamping portion (120), a connecting web (112) which leaves a passage for receiving a free end (15) of a connecting conductor (14) free, and wherein at the connecting web (112) the clamping spring element (12) is arranged so that a clamping force is applied by the clamping leg (216) to the free end (15) of the connecting conductor (14) accommodated in the passage for conductive terminal connection of the end (15) can be provided, characterized in that in the terminal connection space (18) extends a support element from a height of an upper edge of the connecting leg (222) in the direction of the connecting web (112), so that the support element perpendicular to is aligned with the connecting limb (222), and a support surface (401) of the support element pointing towards the free end (15) of the conductor (14) has a stop for a tip (15 ') of the free end (15) of the conductor (14 ), which, when on the free end (15) of the conductor (14) against the clamping force of the clamping spring element (12) acting force is initiated, the conductive clamping connection of the end (15) against the clamping connection frame (10) secures, said Supporting element made of a material having a good conductivity, in particular having a conductivity which is above that of the clamping spring (12), manufactured and connected to the clamping connection frame (10).

Description

The invention relates to an installation switching device, such as a circuit breaker, a residual current circuit breaker or a motor protection switch, service switching device having a plug-in device arranged in a housing, wherein the plug-in clamping device has at least one terminal connection frame and a clamping spring element with a clamping leg, and wherein a terminal connection frame is formed by a first A leg, which is conductively connected via a connecting leg with a Ableitschenkel, wherein between the three legs, a clamping connection space is provided, and wherein between the first leg and the Ableitschenkel having a clamping portion, a connecting web extending, which has a passage for receiving a free End of a connecting conductor leaves free, and wherein on the connecting web, the clamping spring element is arranged so that by the clamping leg on the received in the passage free end of Ansch Lussleiter a clamping force for conductive clamping connection of the end can be provided, according to the preamble of claim 1.

Installation switching devices such as circuit breakers, residual current circuit breakers or motor protection switches are known from the prior art: Such devices are approximately in the writings DE 10 2006 047 254 B3 . DE 10 2007 043 801 A1 and DE 10 2007 044 069 A1 disclosed.

The DE 10 2009 041 636 A1 and the DE 10 2006 047 254 B3 each show an installation switching device having a plug-in terminal arranged in a housing, wherein the plug-in terminal at least one terminal connection frame and a clamping spring element having a clamping leg, and wherein a terminal connection frame is formed by a first leg, which is conductively connected via a connecting leg with a Ableitschenkel, wherein a terminal connection space is provided between the three legs, and wherein between the first leg and the Ableitschenkel having a clamping portion, a connection bar, which leaves a passage for receiving a free end of a connecting conductor, and wherein at the connecting web, the clamping spring element is arranged so that a clamping force for the conductive clamping connection of the end can be provided by the clamping leg on the recorded in the passage free end of the connecting conductor.

The DE 296 06 347 U1 shows an electrical connector, in particular for printed circuit boards, with an end stop which is intended to limit the insertion of a conductor to be inserted in the insertion direction.

The EP 1 217 692 A2 a terminal for an electrical conductor, wherein in a insulating intermediate wall a seat for receiving the tip of an inserted conductor piece is formed.

The DE 10 2007 018 443 A1 shows an electrical connector, in which a catch bag is formed in an insulating housing for receiving the tip of an inserted conductor piece.

A generic service 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 path can be opened and closed from an input terminal to an output terminal. The contact point is generally operated by a switching mechanism with Verklinkungsstelle. A generic service switching device may further include tripping devices, such as 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.

For connection with external connection conductors, screw-type terminal connections are used in addition to screw terminals in generic service switching devices. Clamping elements can be plug-in terminals or spring-loaded terminals. In principle, these can greatly simplify the connection of connection conductors, but today known installation switching devices with screwless terminal connections are still subject to use restrictions.

Screwless terminal connections are designed with a terminal connection frame in such a way that tool-free insertion and removal of connecting leads is possible. This is accomplished by having the plug-in terminals located in the device housing of insulating material within a frame having a spring element which presses against a conductor inserted through a housing opening, the conductor coming to rest on a conductor support connected to the current path of the device , An overcurrent or short-circuit current should not be dissipated via the spring element, which usually consists of spring steel and therefore has a low electrical conductivity, but should always flow over the terminal connection frame or over the conductor support, which is therefore part of or connected to the frame is. The frame therefore forms, in cooperation with the spring element, the contacting and holding device the inserted portion of the conductor.

Under unfavorable circumstances, for example, by pulling or bending the conductor to the action of a force acting from the outside on the inserted conductor force can come, which can lead to an at least partial lifting of the conductor end of the conductor support of the frame. It then comes in this case to longer lasting or undesirable high current flow over the poorly conductive spring element, because the contact with the conductor support was interrupted. As a result, the high-resistance spring element can heat up undesirably strong, which can lead to negative effects on the service switching device. The heating can in extreme cases lead to flame formation.

It is therefore an object of the present invention to provide a generic service switching device with a Steckklemmvorrichtung such that the safety of the device is considerably increased in terms of overheating in the event of lifting the conductor of the conductor support due to an external force on the conductor.

This object is achieved by an installation switching device with the features of claim 1.

Further developments of the device are set forth in the subclaims.

An embodiment of a plug-in terminal installation switchgear according to the invention comprises at least one terminal connection frame in a housing, and a spring steel clip spring element which therefore has a low electrical conductivity. The clamping spring element has at least one clamping leg. The terminal connection frame is in principle formed by three legs: a first leg is conductively connected via a connecting leg with a Ableitschenkel having a clamping portion, that between the three legs, a terminal connection space is formed. Between the first leg and the Ableitschenkel also extends a connecting web for the clamping spring element, which is designed so that it leaves a passage free, which may also be formed like a window in a flat connecting web. Through the passage, the free, stripped end for clamping determination of the intended connection conductor is feasible. It is now usually clamped in the passage by means of the arranged on the connecting web clamping spring element, since the clamping leg is oriented so that its spring or clamping force presses the connection conductor against the conductor support or clamping edge.

Now it is possible that from the outside a force is applied against the conductor, which acts against the clamping force of the clamping spring element and thus can cause the conductor no longer rests on the clamping edge. It can come to a lifting of the conductor end of the conductor support. The conductor end can move without encountering additional metallic supports. These additional conditions are only achieved with very strong twists or deformations of the conductor. In the intermediate position, the current flows from the conductor into the device only via the spring element, which as a rule is only poorly electrically conductive and heats up considerably. This warming can go so far that it comes to the formation of flames and fire danger exists.

This is advantageously counteracted by the installation switching device according to the invention, respectively by the design of the plug-in clamping device by extending in the Klemmanschlußraum a support member from a height of an upper edge of the connecting leg in the direction of the connecting web, so that the support element is aligned perpendicular to the connecting leg. The contact surface, which is formed by the support element, thereby creates a stop for the tip of the free end of the conductor. This is advantageously achieved that the conductor can not avoid further by the stop formed and is stabilized when the conductor is lifted by external force, such as awkward arrangement in the cabinet or by attaching a cable tie, from the conductor support or clamping edge and the contact loses. While in non-inventive embodiments, the conductor then presses on the clamping spring with the above disadvantageous consequence of heating, which can happen because the conductor end is not completely fixed in conventional Steckklemmkonstruktionen, according to the invention prevents the unwanted malpositioning by the support element and it is by the support element, which virtually extends from the terminal base upwards, counteracted the lifting of the conductor at the clamping edge. In this case, the support element is made of a material with a good conductivity, which should be anyhow better than the conductivity of the clamping spring, and it is connected to the frame. As a result, not only an abutment and a fixing aid for the conductor element are formed by the support element, but in addition a secure second contact point is additionally provided in addition to the clamping edge forming the conductor support. As a result, a low-resistance clamping of the conductor is achieved and a heating, which can lead to the formation of flame, prevented.

In particular, the contact surface can secure the conductive clamping connection of the end against the clamping portion.

By an inventively suitably positioned slope on the terminal base, the Pressing conductor end against the conductor support, thus a lifting of the conductor from the conductor support can be prevented even with external force. If this fixation of the conductor end made of metallic highly conductive material, for example as part of the frame, so that a secure second contact point is formed next to the conductor support. As a result, a low-impedance clamping of the conductor is achieved and prevented from forming flames.

For the formation of the support element, various advantageous embodiments are possible. An embodiment of the support element may provide that this extends as an elongated element directly from the upper edge of the connecting leg in the terminal space; it can be realized by a web shape.

The configuration with the oblique web is particularly advantageous because the slope forms a stop for conductors of different diameters, so that the Steckklemmvorrichtung can be used for different conductor thicknesses versatile.

The web made according to this embodiment may, in a preferred embodiment, extend straight upwards from the connecting leg as a truncated element; it is then in each case a right angle between the contact surface of the web and the connecting leg, and between the web side, which faces away from the contact surface and clamped the connecting leg. The web can be soldered in the event that the clamping frame material is made of metal. If the clamping frame is designed as a stamped and bent part, the web can be punched out in the manufacture of the clamping frame and bent upright. The production is then particularly simple.

Alternatively, such a straight upwardly extending web may also be formed by forming the connecting leg from two or more parallel sections, where, at a suitable position, one of the sections is bent, bent or otherwise shaped vertically upward.

In yet another embodiment, the support member may be formed by a portion of the connecting leg of the terminal connection frame, which rises in the terminal connection space in the form of a recess with a rectangular cross-sectional shape. The indentation can extend over the entire width of the terminal connection frame. At least, however, the indentation must be provided at the position at which an inserted conductor could strike after constructive consideration when lifting off the clamping edge. In turn, the indentation can be produced very favorably in the course of stamping during the production of the terminal connection frame.

Yet another embodiment, which is not the subject of the present invention, provides that the support element is formed on an inner side of the housing itself as a non-conductive elevation, which projects into the terminal space and extends quasi into the frame plane.

Reference to the drawings, in which an embodiment of the invention is shown, the invention and further advantageous refinements and improvements of the invention will be explained and described in detail.

• 1 eine Seitenansicht in den Klemmenaufnahmeraum eines Installationsschaltgeräts nach dem Stand der Technik,
• 2 eine Seitenansicht in den Klemmenaufnahmeraum eines erfindungsgemäßen Installationsschaltgeräts mit einem als Steg ausgebildeten Abstützelement in der Steckklemmvorrichtung, ohne Leiter
• 3 eine Seitenansicht in den Klemmenaufnahmeraum eines erfindungsgemäßen Installationsschaltgeräts mit einem als Steg ausgebildeten Abstützelement in der Steckklemmvorrichtung, mit Leiter
• 4 eine Seitenansicht in den Klemmenaufnahmeraum eines erfindungsgemäßen Installationsschaltgeräts mit einem durch die Gehäusewandung ausgebildeten Abstützelement,
• 5 eine Seitenansicht in den Klemmenaufnahmeraum eines erfindungsgemäßen Installationsschaltgeräts mit Steckklemmvorrichtung mit einem als Einbuchtung durch den Klemmrahmen ausgebildeten Abstützelement.

Show it:

• 1 a side view into the terminal receiving space of a service switching device according to the prior art,
• 2 a side view into the terminal receiving space of a service switching device according to the invention with a support member formed as a web in the Steckklemmvorrichtung, without a ladder
• 3 a side view into the terminal receiving space of a service switching device according to the invention with a support member designed as a web in the Steckklemmvorrichtung, with ladder
• 4 a side view into the terminal receiving space of a service switching device according to the invention with a formed by the housing wall support member,
• 5 a side view into the terminal receiving space of a service switching device according to the invention with plug-in device with a trained as a recess by the clamping frame support member.

1 shows a partial sectional view of the terminal connection frame space 18 an installation switching device with a Steckklemmvorrichtung according to the prior art. The plug-in terminal device shown there comprises an insulating material 3 of the type shell housing. In such an embodiment, the housing 3 composed of two housing halves, which are assembled along a circumferential joint line and joined together in the assembled state, for example by riveting, but also by screwing, gluing, welding, etc. The joint line runs in a plane parallel to the flat or flat side parts of the housing. Such housing generic installation switching devices are usually made Plastic injection molded parts produced, which offers itself in the aforementioned construction.

However, the invention is not limited to installation switching devices with shell-type housings. Rather, it can also be used in service switching devices with other types of housings, for example in casings of the socket type.

1 now shows a side view into the terminal receiving space of a service switching device with a Steckklemmvorrichtung according to the prior art, the housing 3 present - not shown figuratively - consists of two flat side panels, respectively shell halves, which except for a front terminal cover 22 through which the conductor 14 with his free end 15 is inserted into the housing, circumferentially have a joint line. The narrow side of the housing is divided into a further away from the viewer rear narrow side 4 and a front narrow side closer to the viewer 5 , The downwardly facing portion of the housing usually has fasteners and therefore forms the attachment side 6 ,

In 1 the viewer looks in the open case 3 on an inside 9 the flat side or shell part on which the screwless terminal connection frame 10 is arranged, with a spring element, here a clamping spring 12 , connected is. The screwless terminal connection frame 10 has a substantially U-shape with a long leg and a short leg, through a connecting leg 222 are cross-connected. These sections of the terminal connection frame 10 serve as a busbar over which the conductor 14 is electrically connected to other components forming the current path in the interior of the housing. The long leg, which is closer to the back of the case, forms a substantially vertical upstand 224 , while at the second short leg a clamping edge 120 is formed having a conductor support portion leading to the conductor 14 turned to lie and contact makes the said electrical connection. Rearward of the clamping edge 120 and thus directly as part of the short, substantially vertical leg lies the discharge section 114 ,

Furthermore, the housing has 3 on the narrow side 4 . 5 an opening through which the frame 10 , inside which the terminal connection space 18 is accessible to the through the opening in the terminal connection space 18 introduced free end 15 of the leader 14 to fix. The attachment of the free end 15 of the leader 14 to provide the necessary position-fixed terminal connection is by the clamping spring 12 formed, which is the free end 15 of the leader 14 against the clamping edge 120 of the frame 10 suppressed. The clamping spring 12 is on the inside of the flat side panels 9 by means of a support 104 . 104 ' stored and also on a connecting web 112 attached. The connecting bridge 112 is at the frame 10 arranged directly on the distal end of the short leg, wherein the passage for the conductor 14 through a window-like recess in the connecting web 112 is formed. It is conceivable that the connecting bar 112 alternatively also on the upstand 224 is arranged.

Further fixing elements for the clamping spring 12 , such as pins or the like, may be present, but are not shown here. The clamping spring 12 has a support leg 212 on, with which they support on the connecting bridge 112 is attached. The support can be made so that the support leg 212 is folded at its free end and with the edge in or on a passage 118 of the connecting bridge 112 is applied. On the support leg 212 closes a bow piece 214 and at the clamping leg 216 at. This clamping leg 216 projects so far into the passage for the leader 14 in the direction of acting as an abutment clamping edge 120 that the leader 14 whose free end 15 is passed through, clamped and positioned. This occurs at the clamping edge 120 by the conductive contact of the conductor end 15 the desired low-resistance contact with the current path in the device.

The spring pressure or clamping pressure holds the conductor 14 in his position.

The opening of the terminal connection space 18 is present by a pivoting with the housing 3 connected terminal cover 22 covered, in the form of a tubular recess 328 a passage for the conductor 14 in the terminal room 18 offers; the passage 328 also serves as a guide means for the on the terminal connection frame 10 connection lead to be connected 14 after passing the tubular recess 328 on the clamping leg 216 the clamping spring 12 meets and, as stated above, is clamped.

For a flexible connection conductor, the passage in the connection bar must 112 if necessary, be opened by the terminal cover 22 is pivoted. Near the tubular recess 328 carries the terminal cover part 22 one on the clamping leg 216 directed nose 30 , which serves as a spring actuator. At the nose 30 Of course, it can also be other protruding components or components, in particular, could the function of the nose 30 also from a collar-like the outlet opening of the tubular recess 328 be formed around circumferential web. Due to the restoring spring force of the clamping leg 216 This presses the nose 30 and thus the terminal cover part 22 outward. By pressure on a pressure surface of the terminal cover 22 this is pivoted inwards, and over the nose 30 becomes the clamping leg 216 far from the clamping edge 120 pushed away that passage for inserting the lead wire 14 or its free end 15 becomes free.

Accordingly, the procedure for releasing a clamped connection conductor. Pressure on the terminal cover 22 causes its pivoting towards the interior of the housing and solves in the manner described above, the deadlock between the clamping leg 216 and the connection conductor 14 or its free end 15 so that it can be pulled out of the passage.

The person skilled in the art knows how the opening movement of the terminal cover part 22 Alternatively, by a standard Längschlitz-, or Phillips screwdriver can be effected.

Even if in the representation according to the 1 to 5 only one passage 328 is shown, so of course two or more such connection openings and recesses may be provided for receiving and connecting a plurality of connection conductors. All connected connection conductors can use a common clamping spring 12 over the clamping legs 216 be clamped. When operating the terminal cover 22 Then all connected conductors are released at the same time and can be released at the same time. However, it could also be used a clamping spring with a number of connectable conductors corresponding number of clamping legs. A single lead could then be removed or added without breaking the clamping force on the remaining possibly already inserted and clamped conductor ends.

Also by the pivoting of the terminal cover part lends itself to the head 14 by applying a pressure which acts against the spring force, an alternative possibility, or a possibility of incorrect positioning, which can lead to the end of the conductor 15 from the conductor support point at the clamping edge 120 takes off. For example, as in 1 indicated, a force in the direction of arrow P in a clockwise direction on the head 14 acts, so forms the end of the tube-like passage 328 in a sense, a bearing or pivot point for the conductor end, and this can then also clockwise from the clamping edge 120 pivot away, so that the low-resistance contact of the connecting conductor is interrupted to the clamping edge.

To lift the conductor end from the conductor support point on the clamping frame 10 counteract, according to the invention is a plug-in terminal device for the aforementioned use in a housing 3 an installation switching device proposed in which the in 1 on the other hand, the object shown is developed further - see 2 to 5 - so that in the terminal connection space 18 an elongate support member from a height of an upper edge of the connecting leg 222 in the direction of the connecting bridge 112 extends, so that the support element perpendicular to the connecting leg 222 is aligned. It forms the to the free end 15 of the leader 14 pointing contact surface 401 the elongated support element a stop for a tip 15 ' the free end 15 of the leader 14 who, if on the ladder 14 one against the clamping force of the clamping spring element 12 acting force is initiated, the conductive terminal connection of the end 15 against the terminal connection frame 10 guaranteed. In particular, the backup takes place against the clamping portion 120 ,

As 2 shows, an embodiment of such a support member as a web 410 be formed, extending from the upper edge of the connecting leg 222 extends straight up and thus offset by 90 ° to the connecting leg 222 protrudes into the terminal space. This can be realized by using a bridge 410 by upwardly forming a portion of the connecting leg 222 in the terminal connection space 18 is formed; for example, if two or more, parallel sections 222 . 222 ' , as in 2 shown the connecting leg 222 form.

In other words, if an L-shaped incision in a connecting leg 222 is introduced, a tab can be bent up and the bridge 410 form; the non-upturned section 222 ' remains as a connecting bridge section. It is quite possible that in a connecting leg 222 , which is flat due to a certain frame width, a U-shaped slot is cut and the thereby cut-free tab vertically upwards in the terminal connection space 18 is directed.

In particular, if the jetty 410 made of the same material as the terminal connection frame 10 and thus has a good conductivity, there is the advantage that - in addition to the clamping edge 120 - A second electrical contact point through the contact surface 401 of the footbridge 410 on the clamping frame 10 is created: Above this the current path, that of the conductor, sits down 14 over the clamping edge 120 and the discharge area 114 and continue over the connecting leg 222 to the upstand 224 is provided without passing over the clamping spring 12 would be guided.

Incidentally, the problem of lifting the ladder is evident 1 There is indicated by the block arrow acting against the spring force force introduction, which, as shown in the dashed circle, to a lifting of the head 14 , respectively the free end 15 of the leader 14 , from the clamping edge 120 leads and instead the head against the thigh 216 the clamping spring 12 suppressed. This would be the problem of overheating of the low-resistance clamping spring 12 result, associated with the stated fire hazard.

Furthermore, there is a further embodiment possibility of a service switching device according to the invention therein, the connecting leg 222 of the terminal connection frame 10 , as in 5 shown with a dent 420 in the terminal connection space 18 into it. The indentation 420 is designed with a rectangular cross-sectional profile and one perpendicular to the connecting leg 222 standing contact surface 401 forms the desired stop for the conductor end 15 , respectively its tip 15 ' ,

In the in 2 . 3 and 5 the embodiments shown, the support element is in each case as a conductive part of the terminal connection frame 10 formed so that the current path can be formed by the support elements thus formed, when it comes to the fact that the conductor 15 from the clamping edge 120 is lifted.

In the alternative, in 4 shown embodiment, which is not the subject of the present invention, however, the support member is a non-conductive, elongated elevation 400 formed to the inside of the flat housing wall belonging. That is, one or both of the shell parts or housing parts is / are designed so that from the shell level a rectangular projection 400 rises and into the terminal room 18 protrudes at the above point. Also in this case there is a contact surface 401 of the section 400 at the point where else the jetty 410 is provided. In the case of the use of injection-molded shell parts, this solution can be easily realized.

In this embodiment, however, it is a non-conductive support element, which is responsible for the task of providing a second contact point for the conductor end 15 can not serve. The shape and the geometry of the thus configured support element is not necessarily rectangular, but the shape is such that a perpendicular to the connecting leg 222 standing stop surface 401 is ready to act upon external force on the conductor 15 fix its position and insofar according to the invention advantageously prevent it from the clamping edge 120 to be picked up.

Therefore, also by the in 4 embodiment shown solved the problem of preventing a current path directly from the conductor 15 on the clamping spring 12 is formed, which could lead to adverse heating of the clamping spring in the sense described above.

The present invention also encompasses any combinations of preferred embodiments as well as individual design features or developments, provided that they are not mutually exclusive.

LIST OF REFERENCE NUMBERS

3

casing

4

rear front

5

front front

6

mounting side

9

Inside of the flat side part

10

screwless terminal connection frame

12

clamping spring

14

connecting conductors

15

free end of the connection conductor

15 '

Tip of the free end of the connection conductor

18

Terminal chamber

22

terminal cover

30

nose

104

In stock

112

connecting web

114

discharge area

118

execution

120

clamping edge

212

support legs

214

elbow

216

clamping leg

222

connecting leg

224

backsplash

328

tubular recess

400

non-conductive survey

401

contact surface

410

straight bridge

420

indentation

Claims (5)

An installation switching device, which has a plug-in clamping device arranged in a housing (3), wherein the plug-in clamping device has at least one clamping connection frame (10) and a clamping spring element (12) with a clamping leg (216), and wherein a clamping connection frame (10) is formed by a first leg (224) conductively connected to a diverter leg (114) via a connecting leg (222), wherein between the three legs (222, 114, 224) a clamping connection space (18) is provided, and wherein between the first leg (224 ) and the Ableitschenkel (114) having a clamping portion (120), a connecting web (112) which leaves a passage for receiving a free end (15) of a connecting conductor (14) free, and wherein at the connecting web (112) the clamping spring element (12) is arranged so that a clamping force is applied by the clamping leg (216) to the free end (15) of the connecting conductor (14) accommodated in the passage for conductive terminal connection of the end (15) can be provided, characterized in that in the terminal connection space (18) extends a support element from a height of an upper edge of the connecting leg (222) in the direction of the connecting web (112), so that the support element perpendicular to is aligned with the connecting limb (222), and a support surface (401) of the support element pointing towards the free end (15) of the conductor (14) has a stop for a tip (15 ') of the free end (15) of the conductor (14 ), which, when on the free end (15) of the conductor (14) against the clamping force of the clamping spring element (12) acting force is initiated, the conductive clamping connection of the end (15) against the clamping connection frame (10) secures, said Supporting element made of a material having a good conductivity, in particular having a conductivity which is above that of the clamping spring (12), manufactured and connected to the clamping connection frame (10). Installation switching device according to Claim 1 , characterized in that the abutment surface (401) secures the conductive clamping connection of the end (15) against the clamping portion (120). Service switching device according to one of the preceding claims, characterized in that the supporting element is an elongated support element extending vertically upwards at the upper edge of the connecting leg (222), in particular a web (410) cut to the connecting leg (222). Installation switching device according to one of Claims 1 to 3 , characterized in that the support element is at the upper edge of the connecting leg (222) vertically upwardly extending web (410) by a in the terminal connection space (18) vertically upwardly shaped portion of at least two parallel, the connecting leg forming portions (222,222 ') is formed. Installation switching device according to one of Claims 1 to 3 , characterized in that the support member is formed by a portion of the connecting leg (222) of the terminal connection frame (10) which bulges into the terminal connection space (18) as a recess (420) of rectangular cross-sectional shape and which extends over a part or above an entire width of the terminal connection frame (10) extends.

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