EP2143122A1

EP2143122A1 - Installation switchgear

Info

Publication number: EP2143122A1
Application number: EP08749075A
Authority: EP
Inventors: Manfred Hofmann; Wolfgang Pump; Ralf Wieland; Albert Stieger; Joachim Majewski; Roland Ritz; Klaus-Peter Eppe; Erwin Muders; Joachim Becker; Rainer Ludovici; Heinz-Erich Popa; Wolfgang Süss
Original assignee: ABB AG Germany
Current assignee: ABB AG Germany
Priority date: 2007-04-28
Filing date: 2008-04-24
Publication date: 2010-01-13
Anticipated expiration: 2028-04-24
Also published as: CN101689446A; CN201311892Y; WO2008131900A1; ATE528777T1; US8093984B2; US20100127816A1; CA2684520A1; DE102008017472A1; EP2143122B1

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

Installation switching device Description

The invention relates to a service switching device according to the preamble of claim 1.

Generic service switching devices are known for example from DE 195 26 592 C2 or DE 10 2004 019 175 A1. 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.

It is the object of the present invention to develop a generic installation switching device so that it allows a more compact design with small external 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 secondary current path is connected in parallel with the series connection of the first bimetal with the main contact point, the main contact point is designed as a single contact point with a fixed and a movable contact piece, and in the housing interior is close to the mounting side and approximately parallel to this running a connected to the input terminal phase connection rail can be arranged, at whose free end a clamping contact protruding from the housing on the fastening side is mounted for clamping to busbars in an installation distributor.

The advantage of an inventively designed installation switching device is that the main bimetal is relieved because when opening the main contact, the current no longer flows through the main bimetal, but on the main bimetal over the secondary flow path. The Hauptbimetall is therefore less thermally loaded in response of the magnetic release, and it can therefore be made smaller.

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.

The advantageous effect of the present invention can be attached phase connection rail is that the service switching device according to the invention thereby directly and without the need of an adapter and without needing a power terminal mechanically and electrically via the existing in the housing interior phase connection rail on the phase rails of an installation distribution can be attached.

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 during a manual or automatic production of the device, since the phase connection rail has a certain range of motion.

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 internal 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 brought near the output terminal, to the edge of the device, resulting in 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 it 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.

In a very advantageous manner, 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 sides behind the spanned by the Hauptbime- tall and the selective bimetal plane. By this invention Permitted feature, 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 portion 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 , over which an overpressure arising during a switching operation can be reduced and switching gases arising during the switching operation 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 connection with the third housing part region, so that the ionized gases formed when the isolating contact point is opened can be led away 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 partial area and the adjacent partial areas may be, for example, 1.5 mm, and the distance between the outer partial areas and the partition walls of the arc extinguishing chamber may also be approximately 1.5 mm in each case. 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 that it counts as air gap, and the required minimum air gap can be maintained even in a quenching chamber due to the compact housing dimensions has a limited space available, for example, only less than 30 mm, about only 28 mm. Also advantageous is an embodiment 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 transition 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. However, in the inventively designed Schaltschaltge- advises the higher contact resistance of a connector is 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 bypass circuit becomes too large, then the second bimetal interrupts the flow of current through the connector in cooperation with the switching mechanism.

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-conductors, wherein a first part-conductor the main bimetallic with the arc counterguide rail opposite the fixed contact point, and a second sub-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 point-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 are accommodated Of course, the standardized and prescribed clearances and creepage distances as well as switching distances are complied with. It is furthermore particularly advantageous if a switching mechanism as described in DE 102006051807 is used, since this is so compact that it fits into the housing part delimited by the front narrow sides and the front front.

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 embodiments and improvements of the invention will be explained and described in more detail.

Show it:

FIG. 1 shows a circuit diagram of a service switching device according to the invention,

Figure 2 schematically shows an inventive installation switching devices, wherein the

Schematic is arranged inside the housing, FIG. 3 is a schematic external view of an installation according to the invention;

FIG. 4 is a schematic plan view of an opened service switching device according to FIG. 3 along the sectional plane AA;

FIG. 5 schematically shows a plan view of an opened service switching device according to FIG. 4, along the sectional plane BB, as well as FIG

FIG. 6 is a schematic plan view of an opened service switching device according to FIG. 3 along the sectional plane AA ₁ in a further embodiment.

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

First, FIG. 1 will be 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 runs a main current path, which also passes through a main thermobimetal metal 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 which carries the movable contact piece 44 (see FIG. 4), and a fixed contact point 222 with a fixed contact piece 46. The movable contact lever 221 is mounted on an axis 223 fixedly mounted in the housing.

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 thermal bimetallic strip 3 along lines of action 81, 80 in mechanical operative connection, and on the other hand is 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. If a short-circuit mes in the main path, the striking armature system 23 along the line of action 83 very quickly strikes the movable contact lever 221 away from the fixed contact 46 (see FIG. 4) and thus opens the main circuit at the main contact point 22. In this switching action is formed at the main contact point 22, a switching arc, the one of the main contact point 22 associated arc extinguishing arrangement, see Fig. 5, supplied and is made to extinguish it.

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 flow of current through the device is thus completely interrupted. A reconnection can now be done manually by operating the switching mechanism 24 via a handle 26, see Figure 2.

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 thereby directly and without the interposition of an adapter and without needing 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 are attached. Let us now consider Figure 2. This shows the circuit diagram of Figure 1, fitted in the circumferential contour of a service switching device according to the invention. In this case, 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 actual 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 armature system 23, the arc quenching device 200 (see FIG. 5) and the current limiting resistor 1 are arranged in the transverse bar of the T-shaped housing bounded by the rear narrow sides, the rear front side and the fastening side.

On the mounting side 12 of the service switching device three phase connection openings 121, 121 b, 121c 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 phase connection rail 92 runs parallel to the fastening side 12 in the interior of the housing 18. The position of the phase connection opening 121c corresponds in size and position to 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 interlocks 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 other two phase connection openings 121, 121b are covered by cover parts 122, 122b, so that no impurities can penetrate into the interior of the device at these points. The device of Figure 2 is thus adapted 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 mounting plate 12 at the middle phase connection opening 122b. In this case, the two remaining phase connection openings 121, 121c 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 can be mechanically supported on the other busbars, which are not electrically connected.

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 by simply using a phase connection rail of suitable length and opening the corresponding phase connection opening and the other, not required, phase connection openings through a cover plate be closed. 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 connecting conductor or via the phase connection rail 92 by means of a busbar in an installation distributor, a wide variety of application opens, without for the various connection variants changes must be made in the device.

Let us now consider Figure 3. This shows in a schematic manner an oblique view of a narrow side of a service switching device 10 according to the invention 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 Figure 4 ), and exhaust openings 400, which are in communication with the main contact point associated arc extinguishing chamber inside the housing, see Figure 5. This also has the advantage that the switching gases are discharged towards the narrow side of the housing and thus away from the fastening 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. In detail, this compact internal structure will be explained in the following FIGS. 4 and 5. 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. Let us now consider Figure 4. This shows schematically a plan view in an open service switching device according to Figure 3, along the sectional plane AA ₁ wherein the right broad side 192 forming housing half shell has been removed.

The output terminal 20 is executed here as a spring terminal with a compression spring 8. The control lever 300 shown in Figure 3 is not shown in Figure 4 for the sake of clarity, but only in the figure 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 force 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 busbar 6 main bimetallic strip 7, further from the free end of Hauptthermobimet- talls 7 via a strand 40 to the movable contact piece 44 of Main contact point 22, 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 shown with regard to the strand guide in FIG. 5.

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 contact point, and this lies 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 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 side 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 where 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-on 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 has bent far enough in its thermal release direction, in the illustration of Figure 4 clockwise downwards, the release lever 51 of Switching mechanism 24 is actuated, whereupon the Verklinkungsstelle is unlatched in the switching mechanism 24 and the switching mechanism 24 via the auxiliary contact switching lever 52, the release contact point 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 by means of a handle 26. The general mode of operation of the switching device described here is already described in the patent application DE 10 2007 020 114, to which reference is explicitly made in this regard.

By means of a locking device 511, the triggering lever 51 can be detected from outside the device in its unlatching position, so that switching on from the outside by the handle 26 is then no longer possible. The locking device 511 may be as described in DE 102007018522.

Overall, therefore, by the inventive design of the resistor assembly, a preferred and thus directed heat transfer from the current limiting resistor 1 out in the first busbar 2 into the selective bimetallic strip 3 is given. 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 partition walls 28 and 281 are here part of an intermediate part 500, which is not shown for the sake of clarity, and which extends substantially parallel to the housing broadside and as a kind of cover the partial area 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. Let us now consider Figure 5. This shows schematically a plan view of an open service switching device according to Figure 3, along the section plane BB, wherein the right broad 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 constructed as described in DE 102007020115.

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 third subspace 27 shown in FIG. 4, into which the arc gases of the disconnecting 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 parallel webs 403. These form between them exhaust ducts that lead to the already shown in Fig. 3 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. As a result, the current limiting resistor 1 is effectively shielded from the arc which arises during a switching operation at the main contact point 22.

FIG. 6 shows a further embodiment of an installation switching device according to the invention. This differs from that shown in Figure 4 in that the current limiting resistor 1 is formed here in the form of a cuboid ceramic block of an electrically conductive ceramic. With its flat broad side opposite the access conductor 60, it is pressed against the outlet conductor 61 by a contact pressure spring 5. 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.

A phase connection rail is connected directly to the access terminal inside the housing via a flexible copper slot, which has a terminal for its connection to a busbar at its end.

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 impact anchor system is disposed between the access terminal and the busbar 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 derailleur, 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 wire.

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 with the fixed contact of the separation 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 magnetic coil 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.

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

Feeding in the current via a connecting conductor at the access terminal,

- supply of the current via a busbar,

- Feed the current through the access terminal and forward to a busbar to power additional devices.

LIST OF REFERENCE NUMERALS

1 current limiting resistor 44 movable contact piece

2 first busbar 46 fixed contact piece

35 47 Track

5 3 Selective thermobimetal

5 Contact pressure spring 48 Wire

6 second busbar 49 strand

7 main thermostatic bimetal 50 slides

8 Compression spring of connection terminals51 Release lever

40 52

10 me, spring clamp sub contact lever

10 Selective circuit breaker, installation 60 Access control on-switch 61 Outgoing conductor

12 mounting side 62 holding opening

14 front front 63 second holding opening

15 rear front 45

15 64 heat dissipation element

16 front narrow side 65 legs

17 rear narrow side 66 second leg

18 housing 67 inner envelope surface

20 output terminal 68 holding device

21 input terminal, access50

20 70 carrier body clamp 71 lateral surface

22 main contact point 72 end face

23 Impact anchor system 73 End face

24 Switching mechanism 74 Heating wire winding

25 isolating contact point 55

25 75 winding part

26 handle 76 cooling surface

27 third section 77 Stecktulpe

28 first partition wall 78 connection point

30 first housing part area 80 line of action

30 40 Litze 60 81 Wirklinie

42 Arc guide rail 82 line of action

43 strand 83 action line 84 Service line 25 200 Arc quenching device

86 Operating line 201 Opening of the output terminal

90 phase rail 221 movable contact lever

90b phase rail 222 fixed contact point

5 90c phase rail 223 fixed axis

91 Clamp contact 30 281 Partition wall

92 Busbar, phase connection 282 Divider rail 283 Divider

93 Flexible wire 300 Operating lever

10 121 Phase connection opening 301 Fixed axis

121b phase connection opening 35 400 exhaust opening

121c phase connection opening 401 bridge

122 Cover 431 Fixed contact rail

122b cover 491 plug contact

15 125 projection 492 pigtail

126 projection 40 500 intermediate part

127 projection 501 top of the intermediate part

128 projection 502 right part of the top

143 strand 503 left part of the top

20 181 parting line 504 second housing part area

182 longitudinal bar 45 511 locking device

183 Crossbar 601 Winding input

191 left broadside 611 winding output

192 right broadside 701 calibration screw

Claims

claims

1. Installation switching device, in particular selective circuit breaker, comprising a mounting side, a front and a rear front side and the mounting and the front connecting broad and front and rear narrow sides

A housing comprising a main current path extending between an input terminal and an output terminal, including a main pad provided with an arc quenching chamber, a striking armature system which places the main terminal in an open position, and a main thermobimetal which acts on a latching keychain such that Contact permanently open, with a Nebenstrompfad, in which a current limiting resistor and also acting on the switch lock selective thermal bimetal and an opening disclosed by the switch lock separating contact point are arranged, and with a handle with which the main contact point are opened and closed via the switch lock can, characterized, a. that the subcurrent path is connected in parallel with the series connection of the first bimetal to the main contact point, b. that the main contact point is formed as a single contact point with a fixed and a movable contact piece, and c. that in the housing interior close to the attachment side and approximately parallel to this running a connectable to the input terminal phase terminal rail can be arranged, at its free end a protruding on the mounting side of the housing terminal contact is mounted for clamping to busbars in a distribution box.

2. Installation switching device according to claim 1, characterized in that the Phasensenschiene is connected to the input terminal via a flexible conductor piece.

3. Installation switching device according to one of the preceding claims, characterized in that the movable contact piece of the main contact point is mounted on a pivotally mounted in a stationary axis main contact lever.

4. Installation switching device according to one of the preceding claims, characterized in that the main - bimetallic strip is arranged approximately parallel to the connected to the fixed contact piece of the main contact point arc guide rail.

5. Installation switching device according to one of the preceding claims, characterized marked, that the current limiting resistor is arranged in a first partition walls comprising the first housing part region between the output terminal and the arc extinguishing chamber.

6. Installation switching device according to claim 5, characterized in that the current limiting resistor designed as a ceramic resistor block and is connected by means of a resiliently contacting busbar with the main bimetallic strip and an electrical conductor with high thermal conductivity to the second bimetal.

7. Installation switching device according to claim 5, characterized in that the current limiting resistor comprises an electric wire winding (74) with a winding input (601) and a winding output (611), in which a wire is helically wound around a support body (70), which two opposite, by a lateral surface (71) connected end faces (72,73), and wherein in an end face (72) of the carrier body (70) at least one holding opening (62) is introduced into which a leg (65) of a heat dissipation element ( 64) for the purpose of heat removal from the wire winding (74) can engage out.

8. Installation switching device according to one of the preceding claims, characterized in that 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 ,

9. Installation switching device according to one of the preceding claims, characterized in that the arc extinguishing chamber is arranged in a second partition walls comprising 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, can be reduced by a resulting in a switching operation overpressure and resulting in the switching action switching gases can escape to the outside.

10. Installation switching device according to claim 9, characterized in that the second housing part region is limited to the housing interior through a substantially parallel to the housing broad sides extending partition, so that between this partition and the opposite second housing broad side, a third housing part area is formed.

11. Installation switching device according to claim 10, characterized in that the isolating contact point is in communication with the third housing part region, so that the ionized gases produced during opening of the isolating contact point can be dissipated into the third housing part region.

12. The service switching device according to claim 1, wherein the impact armature system is disposed between the input terminal and the phase connection rail, and wherein 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 magnetic coil is connected to the fixed contact piece of the main contact point.

13. Installation switching device according to one of the preceding claims, wherein 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

Rear derailleur, the isolating contact and the selective bimetal are arranged in the limited by the front narrow sides and the front front housing part, where against the main bimetallic, the main contact point, in the magnet system, the arc quenching device and the current limiting resistor in the through the rear narrow sides, the rear front and the attachment side limited housing part are arranged.

14. Installation switching devices according to claim 13, wherein the free ends of the main bimetallic metal and the selective bimetal are connected by a slider acting on the release lever of the derailleur, which is in the vicinity of and longitudinally displaceable in the direction parallel to a front narrow side in the front narrow sides and the front front limited housing part is arranged.

15. Installation switching device according to one of the preceding claims, wherein the Hauptther- mobimetall is connected to the output terminal and can be adjusted via an adjusting device connected to the housing.

16. Installation switching device according to one of the preceding claims, characterized in that the connection between the main bimetallic strip and the movable contact piece of the main contact point is made via two part-conductor, wherein a first part-conductor, the main bimetal with the solid contact piece of Main contact point opposite Lichtbogengegenleitschiene, and a second part-conductor connects the Lichtbogengegenleitschiene with the movable contact piece.

17. Installation switching device according to one of the preceding claims, wherein the selective bimetallic strip is fixed with its fixed end to a current limiting resistor contacting busbar, and is connected at its free end via a movable conductor piece with the fixed contact piece of the release contact.

18. 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 movable contact piece of the isolating contact point via a detachable plug connection.

19. Installation switching device according to one of the preceding claims, characterized in that on the mounting side of the housing openings for the passage of the terminal contacts of the housing interior mounted feed terminal conductor are provided, which correspond in number and location of the number and location of the busbars, so that in installed state of the service switching device, the openings correspond to the busbars.

20. Installation switching device according to claim 19, characterized in that openings which are not penetrated by a terminal contact, are covered by means of a detachable cover.

21. Installation switching device according to one of the preceding claims, characterized in that the arc extinguishing chamber parallel to each other and to the housing broadside aligned aligned arc quenching plates, which are arranged in at least two groups, wherein the distance of the respective group delimiting plates of the respective adjacent group or the adjacent partition wall is greater than the distance of the quenching plates within a group.

22. Installation switching device according to claim 21, wherein the sum of the distances between adjacent groups of splitter stack and the distances between the partition walls adjacent splitter stack and the Teilungswän- the same at least the prescribed minimum air gap.

23. Installation switching device according to claim 22, characterized in that two groups of quenching plates are provided, each with the same number of quenching plates per group.

24. Installation switching device according to claim 23, characterized in that three groups of quenching plates each with the same number of quenching plates per

Group are provided.