EP1587125A1 - Installation switchgear - Google Patents

Abstract

The switch device has a main current path containing a series connection of a secondary contact point (4) with associated deionization chamber (9), a magnetic armature system (5) which can be opened by the secondary contact point (4), a main contact point (2), and a main thermal bimetallic trigger (3). Parallel to the secondary contact point is a parallel or selective current path containing a selective resistance (13) and a selective bimetallic trigger (12) which acts on the switch lock. The two triggers can permanently open the main contact point (2) via a switch lock. The main contact point has an associated extinguishing chamber (7) with extinguishing plates (8) arranged close to the dionization chamber. The main bimetallic trigger is arranged perpendicular to a fastening plane as is the main contact point.

Description

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

Such a service switching device is, for example, a selective protection switch, with a main current path, which is a series connection of a first main contact point, a striker system, a secondary contact point and a main bimetallic shutter includes. Furthermore, a generic service switching device has a parallel current path (selective circuit) arranged parallel to the secondary contact point on, a current-limiting resistor (selective resistor) and a second, thermal release (selective bimetallic release) acting on the switch lock wherein the main and / or the selective bimetallic release via a switching lock can open the second contact point, so that it is permanently opened.

Such generic Selektivschutzschalter be in a home installation for Selective protection of downstream circuits used. The thermal overload protection done by a thermal release with relatively slow tripping characteristic.

Selective shutdown means that "small" short circuit currents behind the downstream ones Circuit breakers occur and usually do not exceed 6kA, switched off by these and not by the generic selective circuit breaker should be. Only if after a certain time the "small" short-circuit current is not is switched off, the generic selective circuit breaker should turn off. "Size" Short-circuit currents that occur before the downstream circuit breakers and about 6kA and more, however, should from the generic Selective be switched off immediately.

It is the object of the present invention to provide a generic service switching device smaller and less expensive to produce.

The object is solved by the characterizing features of claim 1.

Thus, according to the invention, the main contact point is one, spatially close to the deionization chamber arranged, additional extinguishing chamber associated with additional extinguishing plates is, and the Deionisierungskammer with the auxiliary extinguishing chamber, the secondary contact point and the impact anchor system are approximately in line in the area of the mounting plane the service switching device arranged; continues to be the main bimetallic shutter in the area of a front device narrow side approximately perpendicular to the mounting plane arranged, and the main contact point is in the range of the other front Narrow side, extending approximately perpendicular to the mounting plane, arranged.

By this inventive arrangement of the modules and elements in the housing the service switching device will use the best possible space under consideration accessible to all prescribed thermal and electrical boundary conditions, so that a total of a generic service switching device with the inventive Arrangement of assemblies and components very compact and inexpensive can be produced.

The individual assemblies and elements can each individually or in interplay be further developed advantageous yet.

The additional extinguishing chamber can be made very small, they normally only the arc that may occur when switching the normal load current must take.

Thus, advantageously, the main bimetallic trigger may be a main bimetallic element and an additional lever, wherein due to the magnetic effect of the main bimetallic current, a force acts on the additional lever such that when a threshold value of the main bimetallic current of the additional lever is exceeded permanently opening the main contact point via the switch lock. To this It is achieved that when the threshold value of the main bimetallic current is exceeded, in the case of a "large" short-circuit current of more than 6kA flows, the main bimetallic shutter very fast, about in the range of 0.1s, the main contact point remains open via the switch lock and the short-circuit current thus shuts off. Without this additional lever would be the main thermostatic bimetallic release with its characteristic thermal delay time switching According to the current state of the art can not be made faster than about 1 to 2s can. The introduction of the additional lever thus allows a much faster shutdown large short-circuit currents through the main thermostatic bimetal release. Thereby the short-circuit current load decreases when the main contact point is switched off, because this is proportional to the square of the short-circuit current multiplied by the Time in which the short-circuit current is applied. This very low short-circuit current load also makes it possible to leave the additional extinguishing chamber small. All in all the short-circuit current load of the service switching device decreases and this can therefore be built more compact.

The selective bimetallic actuator may comprise a U-shaped thermo-bimetal whose Bend perpendicular to the through the two legs of the U-shaped thermo-bimetal fixed bimetallic plane and perpendicular to the mounting plane of the service switching device he follows. This will make a short construction of the selective bimetal possible, nevertheless a large force can be applied. Because the partial forces each of the two legs of the U-shaped bimetal add up. Also this compact Construction of the selective bimetallic release contributes to the compact overall design at.

Advantageously, the switch lock is arranged near the front front side. It can be used as a prefabricated module or from individual, in the device housing be built up parts. The detailed structure of the switch lock is not essential to the invention, moreover. With a handle that can be operated from the outside The main contact point can be permanently opened and closed via the switch lock become.

The main bimetallic element, the U-shaped thermo-bimetal and the additional lever can be parallel to each other and in the area of a front narrow device in be arranged approximately perpendicular to the mounting plane. This also creates a spatial proximity of the three triggering elements to the near the front front arranged switch lock.

Through this spatial proximity of the three triggering elements to each other and to the Switch lock makes it possible to use all three triggering elements over a common Release slide to act on the switch lock. The thereby to be overcome Paths are very short. This too is a contribution to a very compact design of the service switching device.

The additional quenching plates can be in grooves in or as a pre-assembled additional splitter plate package be held on the housing inner wall. Their area is less than half of Deionisierungsbleche.

The rooms for the Deionisierungskammer and the additional chamber can in a, in be formed about cuboid quenching chamber module body. This one is with his Broad sides oriented perpendicular to the mounting plane of the service switching device and by a parallel to the broad sides extending center partition into a Deionisierungs- subspace and shared an additional subspace. The Deionisierungsbleche are located located in the deionization subspace, and the additional quenching plates are located in the additional subspace.

Since the additional quenching plates can be made very small, as described above became, it becomes possible, this beside the Deionisierungskammer in the common To set the extinguishing chamber module body. This saves space and is very compact Construction possible, which also cost by the aforementioned modular design is manufacturable.

Furthermore, the deionization subspace and the additional subspace exhaust channels to the outside. These are between the back of the Deionisierungsbleche or the additional quenching plates and the secondary contact remote from the rear Narrow side of the device by running parallel to the mounting level webs formed the center partition wall of the quenching chamber module body. Support the exhaust ducts a rapid pressure reduction in the Deionisierungskammer by vortexing prevent.

A further fluidic optimization can be achieved by inserting into the exhaust ducts, oriented perpendicular to the mounting plane, having a number of smaller holes Pinholes can be achieved. The thus optimized flow guidance contributes not insignificantly to a compact design of the overall device.

Further advantageous embodiments and improvements of the invention and others Advantages can be found in the further subclaims.

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

Fig. 1

ein Schaltschema eines erfindungsgemäßen Installationsschaltgerätes

Fig. 2

eine schematische Einsicht in ein Installationsschaltgerät, bei dem das Schaltschema nach Fig. 1 verwirklicht ist,

Fig. 3

eine schematische Ansicht des Löschkammer-Aufbaus, gesehen in einer schematischen Schnittansicht auf die Schmalseite an der Eingangsklemme, und

Fig. 4

eine schematische Ansicht der Bimetall-Anordnung, gesehen in Richtung der Geräteschmalseite.

Show it:

Fig. 1

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

Fig. 2

a schematic view of an installation switching device, in which the circuit diagram of FIG. 1 is realized,

Fig. 3

a schematic view of the quenching chamber structure, seen in a schematic sectional view on the narrow side at the input terminal, and

Fig. 4

a schematic view of the bimetal arrangement, seen in the direction of the device narrow side.

Fig. 1 shows a circuit arrangement for a selective circuit breaker according to the invention. In a main current path between an input terminal 1 and a Output terminal 6 is a main contact point 2, formed from a solid and a main movable contact piece mounted on a main contact lever arm, with an associated additional extinguishing chamber 7 with additional extinguishing plates 8, and a sub-contact 4, formed of a fixed and one on a Nebenkontakthebelarm attached movable side contact piece, with one of these Both are in. Deionization Series switched.

Also in the main current path and connected in series to the two contact points 2, 4, There is a main bimetallic trigger 3, which is on the trigger 36th a switching mechanism 20 acts, as well as a magnetic impact armature 5, which is the secondary contact point 4 can open.

Instead of a main thermostatic bimetal actuator, a main shape memory alloy actuator could also be used be used. Overall, the terms are within the meaning of the invention "Bimetallic release" and "bimetallic element" in each occurring word connection as synonymous with "thermal release" and "thermal release element" to read, so that also triggers and trigger elements are recorded, for example Shape memory alloys include.

In the main bimetallic trigger 3, an additional lever 11 is arranged over a line of action 17 also acts on the release lever 36 of the switch lock 20 (see Fig. 2)

The magnetic impact armature 5 is via the line of action 14 with the secondary contact point 4th connected. He puts it in the open position when it flows through a short-circuit current becomes.

Parallel to the sub-contact point 4, a parallel-current path is connected, in which a Resistor body 13 is arranged. Electrically in series with the resistor body 13 connected in the parallel current path is a selective bimetal 12, which also acts on the switching mechanism 20.

The switching mechanism 20 is connected via the line of action 18 with the main contact point 2. The lines of action of the thermostatic bimetals 3, 12 on the switching mechanism 20 are denoted by the reference numerals 16 and 15.

If the switch of FIG. 1 a short circuit in a downstream circuit should turn off, then the magnetic impact armature 5, the first Nebenkontaktstelle 4geöffnet, via the action line 14. The resulting Arc is deleted in the Deionisierungskammer 9. In this case, then the current in commutated the parallel current path and limited by the resistor body 13, wherein the main contact point 2 is still closed. The limited by the resistor 13 Current flows through the coil of the magnetic impact armature 5 and this holds thus the sub-contact point 4 open.

As long as the short-circuit current is not switched off, the selective bimetal warms up 12 and switches at the end of its delay time in this way Finally, the main contact point 2 from permanent, which then the current flow in the is completely interrupted by the Selective circuit breaker protected line.

If the short circuit is now switched off in a downstream circuit breaker is before the delay time of the selective bimetal 12 has expired is, then the current flow through the magnetic impact armature 5 drops below the Triggering threshold and the sub-contact point 4 closes.

If the short-circuit current rises above a defined threshold, for example over 6 kA, which means a "large" short-circuit current, as he usually only before a downstream circuit breaker can occur, so is due to the the current flow in the main bimetallic shutter 3 resulting magnetic field the auxiliary lever 11 is attracted to the main bimetallic element 72 out. The additional lever 11 then triggers the release slide 38 and the release lever 36 the Derailleur 20 remains from, whereby the main contact point 2 permanently opened and the short-circuit current is switched off. The shutdown by the additional lever 11th happens immediately and without delay, since the additional lever 11 is a small inertia having. The shutdown by the additional lever 11 happens much faster as by the main bimetallic element 72. This flows the "large" short-circuit current of more than 6 kA only for a very short time by the selective circuit, accordingly low is also the thermal load of the selective circuit and the load the main contact point 2. To delete a resulting at the main contact point 2 Arcs are then sufficient for the small additional extinguishing plates 8.

Fig. 2 shows a schematic view of an installation switching device in which the Schematic of Fig. 1 is realized.

The device housing has a T-shape, with a front front 132, two rear Front sides 134, 136, two front and two rear narrow sides 138, 140, 142, 144 and a mounting plane 146 fixing a fastening side.

On the mounting side is a snap fastener for snapping the electrical Installation switching device mounted on a top hat rail 180, with a Recess 160 on the mounting side of the service switching device, a fixed Nose 162 has, and with a resiliently in the mounting position in the recess 160 pressed and thereby beyond the rear narrow side of the device 144 protruding Slider 170, which in the locked state with a movable nose 172 behind a longitudinal edge of the hat profile support rail engages

The main contact point 2 is an additional extinguishing chamber arranged next to the deionization chamber 9 Assigned 7 with additional quenching 8 (see Fig. 3).

The Deionisierungskammer 9 with the auxiliary extinguishing chamber 7, the secondary contact point. 4 and the impact anchor system 5 are approximately in line in the region of the mounting plane 146 arranged. The main bimetallic trigger 3 is in the area of a front Device narrow side 138 arranged approximately perpendicular to the mounting plane 146 is. The main contact point 2 is in the region of the other front narrow side 140, approximately perpendicular to the mounting plane 146, arranged.

The main bimetallic trigger 3 comprises a main bimetallic element 72 (see also Fig. 4) and an additional lever 11. Due to the magnetic effect of the main bimetallic current, a force acts on the additional lever 11, that at Exceeding a threshold value of the main bimetallic current of the additional lever 11 is attracted to the main bimetallic element 72, so that an am free end of the auxiliary lever 11 molded extension 11a on a trip slider 38 acts before even the main bimetallic element 72 the trigger slide 38th reached. The shutter slide 38 shifts when actuated in the direction of the front narrow side 138 and thereby moves by means of an integrally formed on him extension 34, the release lever 36 of the switching mechanism 20, so that the switching mechanism 20th the main contact point 2 permanently opens.

The additional lever 11 is close to the fixation point 76 of the main bimetallic element 72 is pivotally mounted on this. The fixation site 76 is connected to the Housing of the impact anchor system 5 connected.

Selective bimetallic actuator 12 includes a U-shaped thermo-bimetal 74 (see Fig. 4), whose bending perpendicular to the through the two legs 78, 80 of the U-shaped Thermo-bimetal 18 fixed bimetal level and perpendicular to the mounting plane 146 takes place.

The main bimetallic element 72, the U-shaped thermo-bimetal 74 and the Additional levers 11 are parallel to each other and in the area of the front device narrow side 138 arranged approximately perpendicular to the mounting plane 146. In Fig. 2, the U-shaped Thermobimetall 74 hidden by the main bimetallic strip 72, in Fig. 4 the mutual arrangement in the direction perpendicular to the front narrow side 138th to see more clearly.

In Fig. 4 it is also clear that the main bimetallic element 72, the U-shaped Thermo-bimetal 74 and the additional lever 11 on the parallel to the mounting plane 146 extending trip slider 38 act.

The trip slider 38 is, as well as the switch latch 20, close to the front front 132 arranged.

With an externally operable handle 22 can via the switching mechanism 20, the Main contact 2 permanently open and closed.

By the shutter slide 38, the switching mechanism of a Verklinkungs- in one Entklinkungszustand brought.

Inside the service switching device is on the front front side 132 a trigger lever actuator 50 in the form of a cylindrical body with an eccentric arranged to the central axis 51 extension 53, which from outside the Installation switching device so adjustable between a switch-on and a switch-off is that in the off position of the trigger slide 38, the release lever 36th holds in unlatching position. Fig. 2 shows this switch-off position. The shutter slider 38 is by blocking its extension 32 through the extension 53 of the cylindrical Body 50 prevented from sliding towards the front narrow side 140, whereby then the extension 34 on the trigger slide 38, the release lever 36 of the Switch lock 20 would release.

FIG. 3 shows schematically a view of the quenching chamber arrangement of the deionization chamber 10 and additional chamber 7, seen from the direction of the rear narrow side 144. The additional quenching plates 8 are formed in grooves 148 formed by webs 148 in the Housing inner wall held.

Each of the additional quenching plates 8 has a less than half as large area as the deionization plates 10.

The Deionisierungskammer 9 is through a wall of insulating material from the additional chamber 7 separately.

The spaces for the Deionisierungskammer 9 and the additional chamber 7 are in a, in approximately cuboid, oriented with its broad sides perpendicular to the mounting plane, by a parallel to the broad sides extending center partition 102 in a Deionization subspace 104 and an additional subspace 106 divided quenching chamber module body 100 formed. The Deionisierungsbleche 10, prefabricated as a splitter stack, are located in the deionization subspace 104, and the additional quenching plates 8 are located in the auxiliary subspace 106.

The deionization subspace 104 and the additional subspace 106 point between the Rear of Deionisierungsbleche 10 and the additional extinguishing plates 8 and the Side facing away from the rear narrow side 144 of the device by parallel to Mounting level 146 extending webs 152 on the center partition 102 in the rear Device narrow side 144 toward open exhaust ducts 154 on.

Into the exhaust channels 154 are oriented perpendicular to the mounting plane 146, a Number of smaller holes having perforated apertures 156 used so that the exhaust channels 154 are separated from the outside world fluidly optimized.

The selective resistor 13 is formed as a ceramic resistor body. He is in the space between the sub-contact 4, the rear derailleur 20, the main bimetallic element 72 and the main contact point 4 arranged.

The terminals 1 and 2 are indicated in Fig. 2 only schematically. They are in realized in a way known manner.

On the front front is still a switch position indicator attached. she includes an opening 40 in the front and a front inside the device Guided, slidably mounted plate 42 with two differently marked color A display lever 48 of the switch lock is with the plate 42 so connected that he depending on the switching state of the switch lock either the one or the other color-coded area 44, 46 pushes in front of the opening 40, so that the switch position is visible from the outside. The opening can be from a viewing window be covered.

Claims (21)

Installation switching device, in particular selective circuit breaker, comprising a main current path comprising a series connection of a secondary contact point (4) with a deionization chamber (9), a magnetic impact armature system (5) through which the secondary contact point (4) can be opened, a main contact point (2) and a main thermostatic bimetal actuator (3), and further comprising a parallel current path (selective circuit) arranged in parallel with the auxiliary contact point (4) and comprising a selective resistor (13) and a selective bimetallic actuator (12) acting on the switchgear. wherein the main and / or the selective bimetallic release (3, 12) can permanently open the main contact point (2) via a switching lock (20),
characterized in that the main contact point (2) is associated with an additional extinguishing chamber (7) with additional extinguishing plates (8) arranged spatially close to the deionization chamber (9), that the deionization chamber (9) with the auxiliary extinguishing chamber (7), the auxiliary contact point (4) and the impact armature system (5) are arranged approximately in a row in the region of the fastening plane (146), that the main thermal bimetallic trigger is arranged (3) in the region of a front narrow side device (138) approximately perpendicular to the fastening plane (146) that the main contact point (2) in the region of the other front narrow side (140) extending approximately perpendicular to the fastening plane (146) is arranged. Installation switching device according to claim 1, characterized in that the main bimetallic trigger (3) comprises a main bimetallic element (72) and an additional lever (11), wherein due to the magnetic effect of the main bimetallic a force so on the additional lever (11) acts that when a threshold value of the main bimetallic current is exceeded, the additional lever (11) opens the main contact point (2) via the switch lock (20). Installation switching device according to claim 2, characterized in that the additional lever (11) near the fixing point (76) of the main bimetallic element (72) is pivotally mounted on this. Service switching device according to one of the preceding claims, characterized in that the selective bimetallic release (12) comprises a U-shaped thermo-bimetal (74) whose bending perpendicular to the through the two legs (78, 80) of the U-shaped Thermo-bimetal (18) fixed bimetallic plane and perpendicular to the mounting plane (146). Service switching device according to claim 4, characterized in that the main bimetallic element (72), the U-shaped thermo-bimetal (74) and the additional lever (11) parallel to each other and in the region of a front device narrow side (138) in approximately perpendicular to Attachment level (146) are arranged. Service switching device according to one of the preceding claims, characterized in that the main bimetallic element (72), the U-shaped thermo-bimetal (74) and the additional lever (11) on a parallel to the mounting plane (146) extending shutter slide (38) act. Service switching device according to claim 6, characterized in that the release slide (38) near the front front side (132) is arranged. Service switching device according to one of the preceding claims, characterized in that the switching mechanism (20) is arranged near the front front side (132). Service switching device according to claim 8, characterized in that the main contact point (2) can be permanently opened and closed by means of an externally operable handle (22) via the switching mechanism (20). Installation switching device according to one of claims 6 to 9, characterized in that the switching mechanism (20) is brought by the release slide (38) from a Verklinkungs- in a Entklinkungszustand. An installation switchgear according to claim 10, characterized by a trigger lever actuating device (50) arranged in the interior of the service switching device on the front front side 132, which can be adjusted from outside the service switching device between a switch-on and a switch-off position such that the trip slider (38) is in the switch-off position. held in Entklinkungsstellung Service switching device according to one of the preceding claims, characterized in that the additional extinguishing plates (8) are held in grooves (150) in the housing inner wall. Service switching device according to one of claims 1 to 11, characterized in that the additional extinguishing plates (8) are held as a preassembled Zusatzlöschblechpaket on the housing inner wall. Service switching device according to claim 12 or 13, characterized in that the additional extinguishing plates (8) have a less than half as large area as the Deionisierungsbleche (10). Service switching device according to one of the preceding claims, characterized in that the Deionisierungskammer (9) is separated by a wall of insulating material from the additional chamber (7). Installation switching device according to claim 15, characterized in that the spaces for the Deionisierungskammer (9) and the additional chamber (7) in a, approximately cuboid, oriented with its broad sides perpendicular to the mounting plane through a parallel to the broad sides extending center partition (102) in a deionization subspace (104) and an additional subspace (106) divided quenching chamber module body (100) are formed and that the Deionisierungsbleche (10) in the Deionisierungs- subspace (104) and the additional quenching plates (8) in the Additional subspace (106) are located. Installation switching device according to claim 16, characterized in that the deionization subspace (104) and the additional subspace (106) between the back of the Deionisierungsbleche (10) or the additional extinguishing plates (8) and the secondary contact remote from the rear narrow side (144 ) of the device by parallel to the mounting plane (146) extending webs (152) on the central partition wall (102) in the rear narrow side of the device (144) open toward exhaust ducts (154). Installation device according to claim 17, characterized in that in the exhaust ducts (154) perpendicular to the mounting plane (146) oriented, a number of smaller holes having perforated diaphragms (156) are inserted, so that the exhaust ducts (154) are separated streamlined optimized to the outside world. Installation switching device according to one of the preceding claims, characterized in that the selective resistance in the space between the secondary contact point (4), the switching mechanism (20), the main bimetallic element (72) and the main contact point (4) is arranged. Installation switching device according to one of the preceding claims, characterized in that the device housing has a T-shape, with a front front side (132), two rear front sides (134, 136), two front and two rear narrow sides (138, 140, 142, 144 ) and a mounting plane (146). Installation switching device according to one of the preceding claims, which is a Quick attachment for snapping the electrical installation switching device on a hat profile support rail, with a recess (160) on the Mounting side (146) of the service switching device, which has a fixed nose (162) has, and with a in a first detent position, the mounting position, resilient pressed into the recess (160) and in the first detent position over the rear device narrow side (144) protruding slide (170), which in snapped Condition with a movable nose (172) behind a longitudinal edge the hat profile support rail engages.

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