EP2143122B1 - Installation switchgear - Google Patents

Abstract

An installation switching device includes a housing, a main contact point having an arc quenching chamber, an input terminal, an output terminal, an impact-style armature system configured to move the main contact point to an open position, a latching mechanism having a latching point and configured to open an isolating contact point disposed in a secondary current path parallel to a main current path, a main thermostatic bimetallic strip configured to act on the latching point to as to cause the main contact point to remain in the open position, a current limiting resistor disposed in the secondary current path, a selective thermostatic bimetallic strip disposed in the secondary current path and configured to act on the latching mechanism, a handle configured to act on the latching mechanism so as to open and close the main contact point, and a phase connecting rail.

Description

The invention relates to a service switching device according to the preamble of claim 1. Generic service switching devices are for example from the DE 195 26 592 C2 or the DE 10 2004 019 175 A1 known. The main contact point is usually designed as a double contact point. As current limiting resistors wound wire wound resistors, but also resistors in the form of a ceramic block are known, which is contacted by contact plates with pressure contact pieces electrically.

The EP 1 365 432 A shows an installation switching device with a housing, with a main current path that contains a Hauptkontaktstelte, a Schlagankersystem and a main bimetallic strip, which acts on a locking latch mechanism, so that the contact point remains permanently open, with a Nebenstrompfad, in which a current limiting resistor and a also acting on the switch lock selective thermal bimetal and a switch lock openable release contact point are arranged, and with a handle, wherein the Nebenstrompfad is connected in parallel to the series connection of the first bimetal with the main contact point, and wherein the housing interior near the mounting side and approximately parallel to this extending a connectable to the input terminal phase connection rail can be arranged, at its free end a protruding on the attachment side of the housing clamping contact is mounted for clamping to busbars in an installation distributor.

It is the object of the present invention to develop a generic service switching device so that it allows a more compact design with small outer dimensions, it is easy to assemble and meets the requirements required by relevant regulations.

The object is achieved by a generic service switching device with the characterizing features of claim 1.

According to the invention, the main contact point is designed as a single contact point with a fixed and a movable contact piece.

The present invention designed as a single contact point main contact point is mechanically simpler than the known double contact points, therefore, requires less material, causes less power loss, is more compact and thus saves space in the housing for other components.

An installation switching device, which has the feature combination according to the invention, therefore, allows a more compact design with small outer dimensions and is easy to assemble.

In an advantageous embodiment of the invention, the phase connection rail is connected to the input terminal via a flexible conductor piece. This simplifies the insertion of the phase connection rail in the case of a manual or automatic production of the device, since the phase connection rail has a certain freedom of movement.

Advantageously, the movable contact piece of the main contact point can be mounted on a pivotally mounted in a stationary axis main contact lever. This has the advantage that the switching accuracy and lifetime of the device is increased because the main contact lever can not move due to the bearing in a stationary axis due to acting on him impulses in switching operations and thus can change its position relative to the fixed contact piece.

Further advantageously, the main bimetallic strip can be arranged approximately parallel to the arc guide rail connected to the fixed contact piece of the main contact point. Thus, a very compact inner arrangement of the individual components is possible, whereby the entire structure is very space-saving.

According to an advantageous embodiment of the invention, the current limiting resistor is arranged in a first housing part region delimited by first dividing walls between the outgoing terminal and the arc extinguishing chamber. He is thus protected from the effects of the arc, and thus it can be placed closer to the arc extinguishing chamber, which saves space in the housing. In addition, it can be spent in the vicinity of the output terminal, to the edge of the device, resulting in a better heat dissipation from the current limiting resistor element. The current limiting resistor can therefore be made more compact overall.

Also advantageous is an embodiment in which the current limiting resistor designed as a ceramic resistor block and is connected by means of a resilient contact with him busbar with the main bimetallic strip and an electrical conductor with high thermal conductivity with the selective bimetal. This leads to a further improved heat dissipation of the current limiting resistor due to the heat conduction through the massive conductor connections and convection with the device outside world.

In a further very advantageous embodiment, the current-limiting resistor comprises an electrical wire winding having a winding input and a winding output, wherein the winding wire is helically wound around a carrier body having two opposite, connected by a lateral surface end faces, and wherein in an end face of the carrier body at least one holding opening is introduced, in which a leg of a Wärmeableitelementes for the purpose of heat dissipation from the wire winding can engage out. As a result, when using a known in principle and very cost-available wire winding resistance, the heat dissipation from the current limiting resistor out can be further improved.

According to the invention the isolating contact point is designed as a single contact point with a fixed and a movable contact piece and mounted in a plane which lies in the direction perpendicular to the housing broad sides behind the plane spanned by the main bimetal and the selective bimetal. By this invention Characteristic, the compactness of the internal arrangement of the individual components of the service switching device is further increased.

A very advantageous further embodiment is characterized in that the arc extinguishing chamber is arranged in a, second partition walls comprehensive, second housing part region between a first housing broadside and a running inside the housing imaginary parallel plane to the first housing broadside, followed by an outwardly guided channel connects An excess pressure arising during a switching operation can be reduced and switching gases arising during the switching process can escape to the outside.

The second housing part region can advantageously be limited to the housing interior by a partition extending approximately parallel to the housing broad sides, so that a third housing subregion is created between this partition wall and the broad side opposite it.

Advantageously, the isolating contact point is in communication with the third housing part region, so that the ionized gases produced during the opening of the isolating contact point can be dissipated into the third housing part region.

Such an arrangement has the advantageous effect that a discharge of the resulting in a switching operation pressure and the switching gases is ensured by the main contact point to the outside, and overall a very space-saving and compact arrangement of the assemblies is ensured within the housing. In particular, by means of the space provided with the third housing part region, the isolating contact can be vented, that is, the ionized gases produced when the isolating contact is opened can be removed through the third housing part region. They do not lie on the contact pieces or the inner wall surfaces in the housing. This further results in an overall increased dielectric strength.

A further advantageous embodiment is characterized in that the arc quenching chamber of the main contact point parallel to each other and to the housing broadside aligned comprises arc quenching plates, which are arranged in at least two groups, wherein the distance of the respective group delimiting quenching of the respective adjacent group or the respectively adjacent Partition wall is greater than the distance of the quenching plates within a Group. The sum of the distances between adjacent groups of splitter stack and the distances between the dividing walls adjacent splitter stack and the partition walls themselves corresponds advantageously at least the prescribed minimum air gap. It can be provided two groups of quenching plates, each with the same number of quenching plates per group, but also three groups of quenching plates, each with the same number of quenching plates per group.

If, for example, the arc quenching chamber according to the invention is subdivided into three partial regions, each partial region may comprise approximately 6 quenching plates. The distance between the central subarea and the adjacent subregions may be 1.5 mm, for example, and the distance between the outer subareas and the partition walls of the arc quenching chamber may also be approximately 1.5 mm each. The advantageous effect of the arrangement according to the invention is that the conditions resulting from the relevant regulations regarding the minimum number of individual quenching plates, the minimum distance between sheets, so this counts as air gap, and the required minimum air gap can be maintained even in a quenching chamber, due to compact housing dimensions has a limited space available, for example, only less than 30 mm, about only 28 mm.

A further embodiment is advantageous in which the fixed contact piece of the main contact point is electrically connected to the movable contact piece of the isolating contact point via a detachable plug connection. The connector can be advantageously realized as a Stecktulpe, in which a plug is inserted. The advantageous effect consists in a simplified assembly. The connection is initially separated; First, the assembly of the derailleur and the isolating contact point is used. The Stecktulpe invention is fixed in the housing. In the next assembly step, the assembly of the main contact point comes to it, and the connection conductor to the main contact is inserted with the plug in the Stecktulpe.

Normally, a plug contact is disadvantageous because of the higher contact resistance compared to a fixed connection and is therefore not used in spite of the simpler installation in known in the art generic service switching devices. But in the inventively designed installation switching device is the higher contact resistance of a connector no obstacle, because of the circuit diagram according to the invention, the current load on the connector occurs only very briefly. If the current in the secondary circuit is too large, then interrupts the second bimetal in conjunction with the switching mechanism, the flow of current through the connector.

A further possible embodiment of the invention is characterized in that the connection between the main bimetallic and the movable contact piece of the main contact point can be made via two part-conductor, wherein a first part-conductor, the main bimetallic with the solid contact point opposite Lichtbogenleitleitschiene, and a second Part-conductor connects the arc counter-guide rail with the movable contact piece. The sub-conductors are advantageously designed as a movable strand, so that they leave room for a movement of the movable contact piece. The advantageous effect of this embodiment is that an additional Blasschleife arises, which drives the arc for deletion at the opening of the contact point. In addition, the commutating voltage drop that the arc must overcome in commutating from the moving contact to the counterguide rail is reduced, causing it to commutate faster on the guardrail and thereby accelerate arc quenching.

A further advantageous embodiment of the invention is characterized in that the connection between the main bimetallic strip and the movable contact piece of the main contact point is realized via a flexible conductor or a flexible stranded wire. This is punctiform attached to the movable contact lever of the main contact point, for example spot welded. A second movable sub-conductor extends from the attachment point of the first sub-conductor on the contact lever to the opposite side of the fixed contact arc Lichtleitschiene. In an advantageous embodiment, the first and the second part-conductors are pieces of a single stranded wire which are fastened, for example spot-welded, to the main bimetallic strip and to the arc guide rail and which is fastened to the movable contact lever with an intermediate fastening point. For example, also spot-welded. The advantageous effect of this embodiment is that the commutating voltage drop, which the arc must overcome when commutating from the movable contact to the counterguide, decreases, whereby the Arc commutes faster on the guard rail and the arc quenching is thereby accelerated.

A further advantageous embodiment is characterized in that the housing has approximately the shape of an inverted T and the longitudinal beam of the T is bounded by the front narrow sides and the front front, and wherein the derailleur, the isolating contact and the selective bimetal in the through the front Narrow sides and the front front side limited housing part are arranged, whereas the main bimetal, the main contact point, the magnet system, the arc quenching device and the current limiting resistor are arranged in the limited by the rear narrow sides, the rear front side and the mounting side housing part. An installation switching device with this combination of features according to the invention has a very compact design and makes it possible to use a housing with 1.5 times the standard module width, ie with a width of 27 mm, in which all components and components of a generic service switching device can be accommodated. Of course, the standardized and prescribed clearances and creepage distances as well as switching distances are complied with. In particular, it is also advantageous if a derailleur as in the DE 102006051807 described since it is so compact executable that it fits into the limited by the front narrow sides and the front front housing part in any case.

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

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.

Figur 1

ein Schaltschema eines erfindungsgemäßen Installationsschaltgerätes,

Figur 2

schematisch ein erfindungsgemäßes Installationsschaltgeräte, wobei das Schaltschema im Inneren des Gehäuses angeordnet ist,

Figur 3

eine schematische Außenansicht eines erfindungsgemäßen Installation Schaltgerätes,

Figur 4

schematisch eine Aufsicht in ein geöffnetes Installationsschaltgerät gemäß Figur 3, längs der Schnittebene AA,

Figur 5

schematisch eine Aufsicht in ein geöffnetes Installationsschaltgerät gemäß Figur 3, längs der Schnittebene BB, sowie

Figur 6

schematisch eine Aufsicht in ein geöffnetes Installationsschaltgerät gemäß Figur 3, längs der Schnittebene AA, in einer weiteren Ausführungsform.

Show it:

FIG. 1

a circuit diagram of a service switching device according to the invention,

FIG. 2

schematically an inventive installation switching devices, wherein the circuit diagram is arranged inside the housing,

FIG. 3

a schematic external view of an installation switching device according to the invention,

FIG. 4

schematically a plan view in an open service switching device according to FIG. 3 , along the section plane AA,

FIG. 5

schematically a plan view in an open service switching device according to FIG. 3 , along the cutting plane BB, as well

FIG. 6

schematically a plan view in an open service switching device according to FIG. 3 , along the sectional plane AA, in another embodiment.

In the figures, identical or equivalent components or assemblies are designated by the same reference numerals.

It will be the first FIG. 1 considered. This shows the circuit diagram of an installation switching device according to the invention. Between an input terminal 21 and an output terminal 20 extends a main current path, which still passes through a main bimetallic strip 7, a main contact point 22 and a striking armature system 23. Parallel to the series connection of the main current bimetal 7 and the main contact point 22 extends a secondary current path. This comprises a current limiting resistor 1, a selective thermal bimetal 3 and a separating contact point 25.

The main contact point 22 is designed as a single break. It comprises a movable contact lever 221, the movable contact piece 44 (see Fig. 4 ), and a fixed contact point with a fixed contact piece 46. The movable contact lever 221 is mounted on a stationary mounted in the housing axis 223.

Furthermore, a mechanical switch lock 24 is included in the service switching device. This is on the one hand with the main bimetallic strip 7 and the selective bimetallic 3 along lines of action 81, 80 in mechanical operative connection, and on the other hand, the switch latch 24 along lines of action 82, 84, 86 with the isolating contact point 25 and the main contact point 22 in mechanical operative connection ,

The function of the service switching device according to the invention according to the circuit diagram shown in Figure 1 is the following. When a short-circuit current occurs In the main path, the impact armature system 23 very quickly strikes the movable contact lever 221 away from the fixed contact 46 along the line of action 83 (see FIG Fig. 4 ) and thus opens at the main contact point 22, the main current path. In this switching action, a switching arc occurs at the main contact point 22, which is one of the main contact point 22 associated arc extinguishing arrangement, see Fig. 5 , supplied and extinguished therein.

When the main pad 22 is opened, the current path commutates to the bypass path. The short-circuit current now flows through the current limiting resistor 1, the selective bimetallic strip 3 and the separation pad 25 to the connection point 78 at which the main and the secondary current path are merged. After a certain delay time, which can be predetermined inter alia by the choice of the resistance value of the current limiting resistor 1, the selective thermal bimetal 3 has acted on the switching mechanism 24 along the line of action 80 through the limited short-circuit current in the secondary current path that this along the line of action 82, 84 the isolating contact point 25 and along the line of action 86, the main contact point 22 permanently opens. In this switching operation, an arc may also arise, which is another, the separation pad associated with 25 arc quenching device, supplied and made to extinguish it. Now both the main and the isolating contact point are interrupted, and the current flow through the device is thus completely interrupted. A Wedereinschalten can now manually by pressing the switch latch 24 via a handle 26, see FIG. 2 , respectively.

To the access terminal, also called Eingangsklemmme, 21 is a flexible copper wire 93, a busbar 92, also referred to as a phase connection rail connected. This carries at its free end a terminal contact 91, with which it can be clamped to a phase rail 90 in a distribution box installation, when the service switching device is mounted there. The service switching device according to the invention can be fixed directly and without the interposition of an adapter and without the need for a power terminal mechanically and electrically via the phase connection rail 92 on the phase rails 90, also referred to as busbars, an installation distribution.

It will now be the FIG. 2 considered. This shows the wiring diagram FIG. 1 , fitted into the peripheral contour of a service switching device according to the invention. The individual elements of the circuit diagram are drawn within the housing contour and relative to one another in a position which corresponds approximately to that in the real device.

The service switching device 10 comprises an insulating housing 18, which has a front front side 14, rear front sides 15, a fastening side 12, and front and rear narrow sides 16,17. The front narrow sides 16 connect the front front side 14 with the rear front sides 15. The rear narrow sides 17 connect the rear front sides 15 with the mounting side 12. The housing 18 thus receives approximately the shape of an inverted T, wherein the longitudinal beam of the T from the front Narrow sides 16 and the front front side 14 is limited, and wherein the switching mechanism 24, the isolating contact 25 and the selective bimetal 3 are arranged in the region of this longitudinal beam. The main bimetal 7, the main contact point 22, the impact anchor system 23, the arc quenching device 200 (see FIG. 5 ) and the current limiting resistor 1 are arranged in the limited by the rear narrow sides, the rear front side and the mounting side crossbar of the T-shaped housing.

On the attachment side 12 of the service switching device, three phase connection openings 121, 121 b, 121 c are attached. The phase connection openings 121, 121b, 121c are positioned so that they correspond to the location of three bus bars 90, 90b, 90c in an installation distributor when the service switching device is installed in the installation distributor. The position of the phase connection opening 121c corresponds in size and position with the clamping contact 91 attached to the free end of the phase connection rail 92 so that the clamping contact 91 passes through the phase connection opening 121c and with the busbar 90 can work together by clamping. The clamping contact 91 is designed as a spring terminal contact with two opposing resilient terminal strips. The two remaining phase connection openings 121, 121 b are cover parts 122, 122 b covered, so that no impurities can penetrate into the interior of the device at these locations.

The device after FIG. 2 is thus set up for connection to the outside of three busbars of an installation distributor. If a device variant for connection to the middle of the three busbars is required, the phase connection rail 90 is replaced by another, shorter phase connection rail whose clamping contact in the installed state protrudes from the fastening side 12 at the central phase connection opening 122b. In this case, the two remaining phase connection openings 121, 121 c are then closed with corresponding cover plates. Between the phase connection openings projections 125, 126, 127, 128 are integrally formed on the attachment side 12. With these, the housing on the other busbars that are not electrically connected, mechanically supported.

The installation switching device according to the invention thus makes it possible to produce devices for connection to different busbars without any other change in the position of the inner functional components simply by using a phase connection rail of suitable length and opening the corresponding phase connection opening and closing the other, not required phase connection openings by a cover plate , There are no further connection means for connecting a device according to the invention to the busbars required. A high flexibility with modular internal structure of the device is thus achieved.

Of course, it is also possible in a device according to the invention to connect an access conductor to the access terminal 21 in a known manner, screwed about with a screw. This connection option is suitable if the switching device according to the invention is installed at an installation location in which no phase rails or bus bars are present.

Finally, a switching device according to the invention by means of the inventive phase connection rail 92, which is electrically connected inside the housing with the access terminal 21, also an application in which the current flow is supplied to the main current path via a conductor connected to the access terminal 21, and at the same time a via the phase connection rail 92 Power rail to which the device is attached, is supplied with power, so that the installation switching device according to the invention in addition to its function as a circuit breaker still fulfills the function of a phase connection terminal to a power rail.

If three service switching devices according to the invention are lined up and installed in an installation distributor or a counter space with a three-phase busbar system, then each of the three devices is provided with a phase connection rail, which is prepared for connection to a different busbar.

In summary, it is stated that an installation switching device according to the invention due to the double possibility of electrical connection, either via the access terminal 21 by means of a connection conductor or the phase connection rail 92 by means of a busbar in a distribution box, a wide variety of applications opens without changes for the various connection variants in the device must be made.

It will now be the FIG. 3 considered. This shows in a schematic manner an oblique view of a narrow side of a service switching device according to the invention 10. One recognizes a right broadside 192, a left broad side 191, an opening 201 for the output terminal 20, a control lever 300 for operating the spring terminal 8 of the output terminal 20 (see FIG. 4 ), and exhaust ports 400 communicating with the arc quenching chamber associated with the main contact location inside the housing, see FIG. 5 , This has the further advantage that the switching gases are discharged to the narrow side of the housing and thus away from the mounting side and the busbar. The switching gases can not be reflected on the busbars.

The housing 18 of the service switching device 10 is constructed of two half-shells, which are assembled at a parting line 181 and connected to each other. The components and assemblies of the installation switching device 10 according to the invention are arranged in the interior of the housing 18 partially in a direction perpendicular to the broad sides 191, 192 one above the other, so that thereby a very compact construction of the switching device 10 is possible. Specifically, this compact internal structure becomes the following FIGS. 4 and 5 explained. The housing forms approximately the shape of an inverted T, whose longitudinal web 182 is formed by the front narrow sides 16 and the front front side 14, and whose transverse web 183 through the rear front side 15, the rear narrow sides 17 and the mounting side 12 is formed.

It will now be the FIG. 4 considered. This shows schematically a plan view in an open service switching device according to FIG. 3 , along the sectional plane AA, wherein the right half side 192 forming housing half shell has been removed.

The output terminal 20 is designed here as a spring terminal with a compression spring 8. The Indian FIG. 3 illustrated operating lever 300 is in the FIG. 4 for clarity, not shown, but only in the FIG. 5 , It is mounted on a fixed axis 301 in the housing. It serves to actuate the compression spring 8 when a connection conductor is to be inserted into the output terminal 20 or removed therefrom. The input terminal 21 is shown schematically as a circle, it can also be designed as a spring terminal, or as a screw terminal.

The main current path runs, starting from the terminal 20, via a here designated as a second busbar 6, a mounted at the free end of the bus bar 6 Hauptthermobimetall 7, further from the free end of the Hauptthermobimetalls 7 via a strand 40 to the movable contact piece 44 of the main contact point 22nd from the fixed contact piece 46 of the main contact point 22 via a bus bar 47 to the impact armature system 23 and on to the terminal 21. The movable contact piece 44 is connected via a strand 43 with an arc guide rail 42.

The strands 40 and 43 are sections of a single stranded wire which is attached to the main bimetallic strip 7 and the arc guide rail 42. At a middle point, it is attached to the movable contact lever 221 in the vicinity of the movable contact piece, for example by spot welding.

In a further embodiment, a strand from the main bimetallic strip 7 can also be led directly to the arc guide rail 42 without being attached to the movable contact lever 221. It is then another strand 143 is provided, which connects the arc guide rail 42 with the movable contact lever 221. This variant is with respect to the strand guide in the Fig. 5 shown.

The main bimetallic strip 7 runs approximately parallel to the rear front side 15. It can be calibrated with a calibration screw 701 from outside the device. The arc guide rail 42 is associated with the arc quenching device of the main pad, and this is in a plane which is parallel to the left broad side 191 and between the left and right broad side 191, 192 within the device. In of the Fig. 4 the arc extinguishing arrangement is therefore not shown, only a portion of the arc guide rail 42 can be seen.

If, due to a short circuit current, the impact armature system 23 hits the main contact point 22 and thus interrupts the main current path, the current flow commutates to the secondary current path. This runs, starting from the terminal 20, via an access conductor 601 to the current limiting resistor 1, through the current limiting resistor 1 through an outgoing conductor 611 and a designated as the first busbar 2 busbar to the selective bimetallic 3. The selective thermal bimetal 3 is approximately aligned parallel to the rear front 15. It is housed in the longitudinal bar 182. From the free end of the selective bimetallic strip 3 of the Nebenstrompfad continues via a strand 48 to the fixed contact piece of the isolating contact point 25, further from the movable contact piece of the isolating contact point 25 via a strand 49 to the fixed contact piece 46 of the main contact point 22. There, the Nebenstrompfad applies the main stream path.

The stranded wire 49 leads to a plug-in contact 491. This comprises a plug-in tulip, which is fixedly connected to the housing half-shell. At the fixed contact piece 46 of the main contact point 22, a pigtail 492 is attached, which carries at its free end a plug which is provided for connection to the plug tulip of the plug contact 491. When mounting the device, the connection to the plug contact 491 is initially disconnected. First, the assembly of the derailleur 24 and the isolating contact point 25 with the strand 49 and the Stecktulpe is used. The Stecktulpe invention is fixed in the housing. In the next assembly step, the assembly of the main contact point 22 comes with the strand 492, and the connecting conductor 492 to the main contact is inserted with the plug in the Stecktulpe. As a result, a simple installation and a very good and location-accurate positioning of the individual modules is given within the housing.

The current limiting resistor 1 is formed here by a heating wire winding 74, which is wound around a carrier body with two opposite, connected by a lateral surface end faces. The heating wire winding 74 comprises the winding input 601 and the winding output 611, as well as a winding part. The winding input 601 and the winding output 611 are extension pieces of the winding part, so they consist of the same wire. The heat dissipation element 64 is in a holding opening in the front side of the carrier body and is simultaneously carrier for the selective bimetallic third

The free end of the heat dissipation element 64 is connected to the outgoing conductor 611. In this way, a prefabricated resistor assembly is formed on the inside of the housing half shell are retaining projections 68, approximately in the form of molded projections which leave a slot between them. In this slot, the heat sink 64 is clamped so that thereby the resistor assembly is positioned and held in the housing in a simple manner. The heat dissipation element 64 significantly improves the heat dissipation out of the current limiting resistor 1.

The free end of the selective bimetallic strip 3 is coupled to a slider 50, which, when the selective bimetallic strip 3 is far enough in its thermal release direction, in the representation of FIG. 4 Thus, clockwise down, has bent, the trigger lever 51 of the switch latch 24 is actuated, whereupon the Verklinkungsstelle is unlatched in the switch latch 24 and the switch latch 24 via the sub-contact lever 52, the release pad 25 opens. The switching lock 24 also opens the main contact point 22 via a further lever mechanism not shown here. Now, the current flow through the device between the two connection terminals 20, 21 is completely interrupted. The switching mechanism 24 can also be operated manually via a handle 26. The general mode of operation of the switching device described here is already in the patent application DE 10 2007 020 114 to which reference is expressly made in this regard.

By a locking device 511, the release lever 51 can be determined from outside the device forth in its Entklinkungsposition, so that then switching on from the outside by the handle 26 is no longer possible. The locking device 511 may be as in the DE 102007018522 be described described.

Overall, therefore, a preferred and thus directed heat transfer from the current limiting resistor 1 into the first busbar 2 into the selective bimetallic strip 3 is given by the inventive design of the resistor assembly.

This is advantageous because it allows the selective bimetallic strip 3 to be coupled very intensively to the heat dissipated from the current-limiting resistor 1.

By partition walls 28, 281, 282 and 283 is a, here referred to as a third sub-area, partial area 27 separated inside the housing. The two partitions 282 and 283 are integrally formed on the housing half shell. They form a kind of funnel whose wide opening is located in the region of the separating contact point 25. If at the opening of the isolating contact point there is a switching arc, so resulting gases are passed through this funnel into the third portion 27. The two partitions 28 and 281 are here part of an intermediate part 500, which is not shown for clarity, and which extends substantially parallel to the housing broadside and as a kind of cover the portion 27 terminates laterally and upwards. The switching gases of the separating contact arc are guided in the third portion 27 and can not be reflected uncontrollably at the contact points, whereby deterioration of the contact properties is avoided.

It is now the FIG. 5 considered. This shows schematically a plan view in an open service switching device according to FIG. 3 , along the sectional plane BB, wherein the right half side 192 forming housing half shell has been removed. In this view, the intermediate part 500 can be seen in its position in the left half of the housing. In the right half of the intermediate part 500, a pocket-like recess is formed, also referred to as the second housing part region 504, in which the arc quenching device 200 of the main contact point is received. This essentially comprises an arc splitter stack, which is not described here in detail. It is built like in the DE 102007020115 described.

The arc is supplied from the main contact point via a Festkontaktleitschiene 421 and designated as a counterguide rail arc guide rail 42 the arc splitter stack. The main bimetal 7 and the selective bimetallic strip 3 are approximately parallel to the Festkontaktleitschiene 421st

The right part 502 of the upper side 501 of the intermediate part 500, on which the arc quenching device rests, forms the upper end of the in the Fig. 4 represented third subspace 27 into which the arc gases of the separating contact are introduced.

The arc splitter stack is open to the left to the left part 503 of the top 501 of the intermediate part 500, so that the arc gases are directed out of the arc splitter stack in this sub-area. The left part 503 of the top 501 carries perpendicular to the rear narrow side 17 and mutually parallel webs. These form between them exhaust ducts, to those in the Fig. 3 already shown exhaust openings 400 in the rear narrow side 17 of the housing. Through these exhaust air ducts, the pressure generated by the arc, degraded and the switching gases can escape through these exhaust ducts to the outside. As already mentioned, this has the advantage that the switching gases are discharged to the narrow side of the housing and thus away from the mounting side and the busbar.

Between the first partition wall 28, the rear narrow side 17 and the left part 503 of the upper side of the intermediate part 500, a first housing part region 30 is formed, in which the current limiting resistor 1 is arranged. Thus, the current limiting resistor 1 is effectively shielded from the resulting at a switching operation at the main contact point 22 arc.

The FIG. 6 shows a further embodiment of a service switching device according to the invention. This is different from the one in the FIG. 4 represented in that the current limiting resistor 1 is formed here in the form of a cuboid ceramic block of an electrically conductive ceramic. With his the access conductor 60 opposite flat broadside he is pressed by a contact pressure spring 5 against the outgoing conductor. The output conductor 61 is designed here as a stable busbar, and is in electrically conductive contact with the first busbar second

In the following, again important aspects of the present invention are not exhaustively enumerated.

The main current path includes the main current bimetal, the main contact point and the impact anchor system.

The secondary current path includes the selective resistor, the selective bimetal and the isolating contact. The secondary current path is connected in parallel with the series connection of the main current bimetal and the main contact.

The main contact is designed as a single break with a movable contact and a fixed contact. The movable contact is mounted on an axis fixed in the housing.

Directly connected to the access terminal, a phase connecting rail is connected inside the housing via a flexible copper strand, which carries at its end a connection terminal for connection to a busbar.

The selective resistor is disposed between the output terminal and the arc extinguishing chamber, in a separate housing area defined by partition walls.

The main current bimetal is arranged approximately parallel to the arc guide rail of the fixed contact of the main contact.

The arc extinguishing chamber is arranged in a separate housing region, to which an outwardly guided channel connects, via which the pressure resulting from short cut-offs is reduced.

The isolating contact is designed as a single break with movable contact and fixed contact and arranged isolated under the selective bimetal and the main current bimetal. The isolating contact is in communication with a further housing region below the quenching chamber, in which the ionized gases formed during contact opening are removed.

The knock anchor system is disposed between the access terminal and the bus bar terminal, with one coil end connected to the access terminal and the other end connected via a bus bar to the fixed contact of the main contact.

The switching mechanism, the isolating contact and the selective bimetal are in the upper housing part, the current limiting resistor, the main current bimetal, the main contact and the magnet system are arranged in the lower housing part.

The slide, which establishes the connection between the main or selective bimetal and the release lever, is arranged in the "upper" housing part approximately parallel to the front narrow side.

The main current bimetallic strip is fastened to the outgoing terminal and can be adjusted via an adjusting device or calibrating device attached to the housing.

The free end of the main current bimetal is connected to the movable contact of the main contact and the counterguide rail of the arc quenching chamber via a copper strand.

The selective bimetal is attached at one end to a bus bar which is contacted at the current limiting resistor, the other (movable) end is connected via a flexible copper wire to the fixed contact of the break contact.

A busbar leading to the busbar terminal is connected directly to the access terminal via a flexible copper strand.

For safe potential separation between the access terminal or the busbar connection and the movable contact of the main contact, the magnetic circuit inside is completely lined with insulation.

The impact armature system is disposed between the input terminal and the phase connection rail, and a first coil end of the magnetic coil of the impact armature system is connected to the input terminal and the other end of the solenoid to the fixed contact of the main contact point.

The free ends of the main bimetal and the selective bimetal are connected by a slider acting on the release lever of the derailleur, which is arranged in the vicinity of and longitudinally displaceable in the direction parallel to a front narrow side in the limited by the front narrow sides and the front front housing part.

The main bimetallic strip is connected to the output terminal and can be adjusted via an adjusting device connected to the housing.

On the mounting side of the housing openings for the passage of the terminal contacts of the attached inside the housing feed-in conductor are provided, which correspond in number and location of the number and location of the busbars, so that correspond in the installed state of the service switching device, the openings with the busbars.

Openings, which are not penetrated by a terminal contact, are covered by means of detachable cover parts.

• Einspeisung des Stromes über einen Anschlussleiter an der Zugangsklemme,
• Einspeisung des Stromes über eine Sammelschiene,
• Einspeisung des Stromes über die Zugangsklemme und weiterleiten an eine Sammelschiene zur Spannungsversorgung weiterer Geräte.

Due to the phase connection rail in connection with the access terminal, there are several different ways of using and installing the device without having to make any changes to the device. These include

• Supply of the current via a connection conductor at the access terminal,
• Supply of the current via a busbar,
• Feed in the current via the access terminal and forward to a busbar to supply power to other devices.

LIST OF REFERENCE NUMBERS

1

Current limiting Wderstand

2

first busbar

3

Selective thermostatic bimetal

5

Contact pressure spring

6

second busbar

7

Main thermal

8th

Compression spring of the terminal, spring clamp

10

Selective circuit breaker, service switching device

12

mounting side

14

front front

15

rear front

16

front narrow side

17

rear narrow side

18

casing

20

output terminal

21

Input terminal, access terminal

22

Main contact point

23

Impact armature system

24

switch lock

25

Isolating contact point

26

handle

27

third subarea

28

first partition wall

30

first housing part area

40

braid

42

arc guide

43

braid

44

movable contact piece

46

solid contact piece

47

conductor rail

48

braid

49

braid

50

pusher

51

sear

52

Besides contact lever

60

access ladder

61

outgoing conductor

62

holding opening

63

second holding opening

64

The thermal transfer member

65

leg

66

second leg

67

inner envelope

68

holder

70

support body

71

lateral surface

72

face

73

face

74

heating wire

75

winder

76

cooling surface

77

plug tulip

78

junction

80

line of action

81

line of action

82

line of action

83

line of action

84

line of action

86

line of action

90

phase rail

90b

phase rail

90c

phase rail

91

clamping contact

92

Power rail, phase connection rail

93

Flexible wire

121

Phase connection opening

121b

Phase connection opening

121c

Phase connection opening

122

cover

122b

cover

125

head Start

126

head Start

127

head Start

128

head Start

143

braid

181

parting line

182

longitudinal web

183

crosspiece

191

left broadside

192

right broadside

200

Arc quenching device

201

Opening of the output terminal

221

movable contact lever

222

fixed contact point

223

fixed axis

281

partition wall

282

partition wall

283

partition wall

300

operating lever

301

fixed axis

400

exhaust vent

401

web

431

fixed contact guide rail

491

plug contact

492

pigtail

500

intermediate part

501

Top of the intermediate part

502

right part of the top

503

left part of the top

504

second housing part area

511

locking device

601

winding input

611

winding output

701

calibration screw

Claims (19)

1. Installation switching device, in particular a selective circuit breaker, having a housing (18) which has an attachment face (12), a front (14) front face, a rear (15) front face and broad faces and front and rear narrow faces (16, 17) which connect the attachment face and the front face (12, 14, 15), having a main current path which runs between an input terminal and an output terminal (21, 20) and contains a main contact point (22) which is provided with an arc quenching chamber (200), an impact-type armature system (23) which moves the main contact point (22) to the open position, and a main thermostatic bimetallic strip (7) which acts on a latching mechanism (24) with a latching point, such that the contact point (22) remains permanently open, having a secondary current path in which a current limiting resistor (1) and a selective thermostatic bimetallic strip (3), which likewise acts on the latching mechanism, as well as an isolating contact point (25) which can be opened by the latching mechanism are arranged, and having a handle (26) by means of which the main contact point (22) can be opened and closed via the latching mechanism (24), with the secondary current path being connected in parallel with the series circuit formed by the first bimetallic strip (7) and the main contact point (22), and in which case a phase connecting rail, which can be connected to the input terminal (29), can be a phase connecting rail (92), which can be connected to the input terminal (21), can be arranged close to the attachment face (12) in the housing interior and running approximately parallel to the attachment face, at the free end of which phase connecting rail a terminal contact (91) is fitted, which projects out of the housing on the attachment face (12), for clamping on busbars (90) in an installation distribution block, characterized in that the main contact point (22) is in the form of a single contact point with a fixed and a moving contact piece (46, 44).
2. Installation switching device according to Claim 1, characterized in that the phase connecting rail (92) is connected to the input terminal via a flexible conductor piece (93).
3. Installation switching device according to one of the preceding claims, characterized in that the main thermostatic bimetallic strip (7) is arranged approximately parallel to the arc guide rail which is connected to the fixed contact piece (46) of the main contact point (22).
4. Installation switching device according to one of the preceding claims, characterized in that the current limiting resistor (1) is arranged in a first housing subarea, which has first partition walls, between the output terminal and the arc quenching chamber.
5. Installation switching device according to Claim 4, characterized in that the current limiting resistor (1) is in the form of a ceramic resistance block, is connected to the main thermostatic bimetallic strip (7) by means of a busbar which makes contact with it in a sprung manner, and is connected to the second bimetallic strip (3) via an electrical conductor with high thermal conductivity.
6. Installation switching device according to Claim 4, characterized in that the current limiting resistor (1) comprises an electrical wire winding (74) with a winding input (601) and a winding output (611), in which a wire is wound in a helical shape around a mount body (70) which has two opposite end surfaces (72, 73) which are connected by a casing surface (71), and with at least one holding opening (62) incorporated in one end surface (72) of the mount body (70), in which holding opening (62) one limb (65) of a heat dissipation element (64) can engage, for the purpose of heat dissipation from the wire winding (74).
7. Installation switching device according to one of the preceding claims, characterized in that the isolating contact point (25) is in the form of a single contact point with a fixed and a moving contact piece, and is fitted on a plane which lies in the direction at right angles to the housing broad faces, behind the plane which is covered by the main bimetallic strip (7) and the selective bimetallic strip (3).
8. Installation switching device according to one of the preceding claims, characterized in that the arc quenching chamber (200) is arranged in a second housing subarea, which has second partition walls, between a first housing broad face and an imaginary plane which runs in the housing interior and is parallel to the first housing broad face, to which subarea a channel which passes outward is connected, via which any overpressure which occurs during a switching operation can be dissipated, and the switching gases which are created during the switching operation can escape to the outside.
9. Installation switching device according to Claim 8, characterized in that the second housing subarea is bounded toward the housing interior by a partition wall which runs approximately parallel to the housing broad faces, such that a third housing subarea is created between this partition wall and the second housing broad face opposite it.
10. Installation switching device according to Claim 9, characterized in that the isolating contact point is connected to the third housing subarea, such that the ionized gases which are created when the isolating contact point opens can be dissipated into the third housing subarea.
11. Installation switching device according to one of the preceding claims, with the impact-type armature system being arranged between the input terminal and the phase connecting rail, and with a first coil end of the magnet coil of the impact-type armature system being connected to the input terminal, and the other end of the magnet coil being connected to the fixed contact piece of the main contact point.
12. Installation switching device according to one of the preceding claims, with the housing being approximately in the form of an inverted T, and with the longitudinal bar of the T being bounded by the front narrow faces and the fore front face, and with the latching mechanism, the isolating contact and the selective bimetallic strip being arranged in the housing part which is bounded by the front narrow faces and the fore front face, while in contrast the main thermostatic bimetallic strip, the main contact point, the magnet system, the arc quenching device and the current limiting resistor are arranged in the housing part which is bounded by the rear narrow faces, the rear front face and the attachment face.
13. Installation switchgear according to Claim 12, with the free ends of the main thermostatic bimetallic strip and of the selective bimetallic strip being connected by means of a slide which acts on the tripping lever of the latching mechanism and is arranged in the vicinity of and such that it can move longitudinally in the direction parallel to a front narrow face, in the housing part which is bounded by the front narrow faces and the front front face.
14. Installation switching device according to one of the preceding claims, with the main thermostatic bimetallic strip being connected to the output terminal, and having the capability to be adjusted via an adjusting device which is connected to the housing.
15. Installation switching device according to one of the preceding claims, characterized in that the connection between the main thermostatic bimetallic strip and the moving contact piece of the main contact point is made via two conductor elements, with a first conductor element connecting the main bimetallic strip to the arc opposing guide rail which is opposite the fixed contact piece of the main contact point, and with a second conductor element connecting the arc opposing guide rail to the moving contact piece.
16. Installation switching device according to one of the preceding claims, with the fixed end of the selective thermostatic bimetallic strip being attached to a busbar which makes contact with the current limiting resistor, and with its free end being connected via a moving conductor piece to the fixed contact piece of the isolating contact.
17. Installation switching device according to one of the preceding claims, characterized in that the fixed contact piece of the main contact point is electrically connected to the moving contact piece of the isolating contact point via a detachable plug connection.
18. Installation switching device according to one of the preceding claims, characterized in that openings (121, 121b, 121c) are provided on the attachment face (12) of the housing, for the clamping contacts (91) of the feed connecting conductors (92) which are fitted in the housing interior to pass through, the number and position of which feed connecting conductors correspond to the number and position of the busbars, such that the openings correspond to the busbars when the installation switching device is in the installed state.
19. Installation switching device according to one of the preceding claims, characterized in that the arc quenching chamber (200) has arc splitter plates which are aligned parallel to one another and to the housing broad face, and are arranged in at least two groups, with the distance between the splitter plates which bound the respective group and the respectively adjacent group or the respectively adjacent partition wall being greater than the distance between the splitter plates within one group.

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