EP1365432A1 - Circuit and/or apparatus protection switch - Google Patents

Abstract

The device has a first separation point, a first magnet mechanism and a first slower movement mechanism in series in a main current path from input to output, a second separation point, a resistance and a further slower movement mechanism in series in an auxiliary current path from input to output and a third separation point, a second resistance and a second magnet mechanism in series towards the null conductor or the conductor of another phase. The line and/or equipment protection switch has a first separation point, a first magnet mechanism and a first slower movement mechanism (2) in series in a main current path in the direction from input to output, a second separation point, a resistance and a further slower movement mechanism in series in an auxiliary current path in the direction from input to output and a third separation point, a second resistance and a second magnet mechanism in series in the direction of the null conductor or the conductor of another phase.

Description

The invention relates to a line and / or circuit breaker according to the Preamble of claim 1.

Such a circuit breaker is in terms of its functional principle from DE 34 09 513 and known from DE 41 18 377 with regard to its mechanical implementation.

The invention has for its object the circuit breaker according to DE 34 09 Execute 513 in a way that is more rational manufacturing than the execution allowed according to DE 41 18 377.

The object is achieved according to the invention by the measures according to the characterizing part of claim 1 initially in such a way that these reversals the previous orders a significant reduction in the number of parts of the circuit breaker. In particular, the required air and creepage distances easier and with a small number of components achieve. Above all, however, there are advantageous design options, which is realized by the subjects of the subclaims and in the drawings are shown and described.

With the objects of claims 2 and 3 and 4, the number of parts again decidedly reduced.

The subject matter of claims 5 to 8 also simplifies assembly.

With the objects of claims 9 to 15 is known from DE 195 13 062 A. Concept for installing a circuit breaker on the busbars of a distributor has been developed so that it is for the new Miniature circuit breaker is suitable.

In the embodiment according to claim 10, the resilient contact leg or the contact clip with the flag can be made of a material other than the aspect of conductivity with regard to the desired spring properties, other than the further line, the material of which, in addition to conductivity, has manufacturing advantages such as a good ductility. At the same time, the same parts can be used for all three phases. The principle is generally applicable to circuit breakers and is particularly advantageous if, as a result of large quantities, separate productions do not become cheaper.
The proposed solution is favored by a position of the further conductor strip angled into the course along the side wall near the longitudinal center of the circuit breaker.

This position is provided according to claim 11. The relevant cable routing means in the case of two of the three assignments of the contact leg mentioned or the contact clip a detour. However, it provides overall and, above all, with Consideration of electrical-physical influences is an advantageous solution.

With the two branches formed according to claims 12 and 13 and fastenings of these branches in said frame structure, the contact leg or the contact clip and the conductor strip are held firmly enough in the handling of the assembly, even though the conductor strip in the flat channel before the installation of the The assembly only has a certain hold and the flag of the conductor strip and the contact leg or the contact clip and its flag protrude freely.
The bezels according to claim 15 belong to the mentioned adaptations according to claims 5 and 6, which interact with the two parallel walls.
This also includes the plug-in receptacles mentioned in claims 13 and 14 on the side walls of the housing.

Fig. 1

zeigt ein Schaltbild eines Leitungsschutzschalters,

Fig. 2

zeigt den Leitungsschutzschalter in einer Ausführung zur Montage auf einer Hutschiene in Stellung "Ein",

Fig. 3

zeigt den Leitungsschutzschalter in Stellung "Aus",

Fig. 4

zeigt den Leitungsschutzschalter nach teilweisem Ausschalten infolge Kurzschluss,

Fig. 5

zeigt die Teile einer ersten und einer zweiten Baugruppe des Leitungsschutzschalters in auseinandergezogener Darstellung,

Fig. 6

zeigt die erste und die zweite Baugruppe in auseinandergezogener Darstellung,

Fig. 7

zeigt die erste und die zweite Baugruppe in auseinandergezogener Darstellung unter anderem Blickwinkel,

Fig. 8

zeigt eine dritte Baugruppe des Leitungsschutzschalters,

Fig. 9

zeigt die dritte Baugruppe unter anderem Blickwinkel,

Fig. 10

zeigt einen Halbkasten des Gehäuses und die mit der ersten zusammengesetzte zweite Baugruppe in auseinandergezogener Darstellung,

Fig. 11

zeigt die dritte und eine vierte Baugruppe in auseinandergezogener Darstellung,

Fig. 12

zeigt den einen Halbkasten mit eingesetzter erster und zweiter Baugruppe und die mit der vierten zusammengesetzte dritte Baugruppe in auseinandergezogener Darstellung,

Fig. 13

zeigt den einen Halbkasten des Gehäuses nach vollständigem Einbau der Baugruppen und den anderen Halbkasten sowie zwei Einzelteile in auseinandergezogener Darstellung,

Fig. 14

zeigt einen Halbkasten eines Gehäuses eines Leitungsschutzschalters zur Montage auf Sammelschienen mit zwei eingesetzten Baugruppen und eine zusammengesetzte dritte und vierte Baugruppe in auseinandergezogener Darstellung entsprechend Fig. 12,

Fig. 15

zeigt den Halbkasten nach vollständigem Einbau der Baugruppen und den zugehörigen anderen Halbkasten sowie zwei Einzelteile in auseinandergezogener Darstellung entsprechend Fig. 13,

Fig. 16

zeigt die Umkehrung zu Fig. 1, d.h. dieselben Baugruppen von der anderen Seite gesehen zusammen mit dem anderen Halbkasten,

Fig. 17

zeigt die Fig. 3 entsprechende Umkehrung zu Fig. 2,

Fig. 18

zeigt in einer Darstellung entsprechend Fig. 4 links die Einrichtung des Schutzschalters für eine andere Phase,

Fig. 19

zeigt in gleicher Darstellung die Einrichtung des Schutzschalters für die dritte Phase,

Fig. 20

zeigt jeweils eine Einzelheit aus Fig. 4, 5 bzw. 6,

Fig. 21

zeigt in auseinandergezogener Darstellung eine Baugruppe, und

Fig. 22

zeigt die Baugruppe im wesentlichen zusammengesetzt sowie eine weitere Baugruppe.

The drawings show two exemplary embodiments of the invention.

Fig. 1

shows a circuit diagram of a circuit breaker,

Fig. 2

shows the circuit breaker in a version for mounting on a top hat rail in the "on" position,

Fig. 3

shows the circuit breaker in the "Off" position,

Fig. 4

shows the circuit breaker after partial switch-off due to short circuit,

Fig. 5

shows the parts of a first and a second assembly of the circuit breaker in an exploded view,

Fig. 6

shows the first and the second assembly in an exploded view,

Fig. 7

shows the first and the second assembly in an exploded view from a different angle,

Fig. 8

shows a third assembly of the circuit breaker,

Fig. 9

shows the third assembly from a different perspective,

Fig. 10

shows a half box of the housing and the second assembly assembled with the first assembly in an exploded view,

Fig. 11

shows the third and a fourth assembly in an exploded view,

Fig. 12

shows the half box with inserted first and second assembly and the fourth assembly assembled with the third assembly in an exploded view,

Fig. 13

shows the half box of the housing after complete assembly of the modules and the other half box and two individual parts in an exploded view,

Fig. 14

shows a half box of a housing of a circuit breaker for mounting on busbars with two inserted modules and a composite third and fourth module in an exploded view corresponding to FIG. 12,

Fig. 15

shows the half box after complete assembly of the modules and the associated other half box and two individual parts in an exploded view corresponding to FIG. 13,

Fig. 16

shows the reversal to Fig. 1, ie the same modules seen from the other side together with the other half box,

Fig. 17

3 shows a corresponding reversal to FIG. 2,

Fig. 18

4 shows the device of the circuit breaker for another phase in a representation corresponding to FIG. 4,

Fig. 19

shows in the same representation the setup of the circuit breaker for the third phase,

Fig. 20

each shows a detail from FIGS. 4, 5 and 6,

Fig. 21

shows an exploded view of an assembly, and

Fig. 22

shows the assembly essentially assembled as well as another assembly.

As can be seen in the circuit diagram of FIG. 1 and otherwise best of FIG. 2, the circuit breaker shown leads a main current path 1 in which a thermal release 2 responding to overcurrent, a magnetic mechanism 3 responding to short circuit and one from the thermal release 2 as well separation point 4 actuated by the magnetic mechanism 3 are arranged.
The magnetic mechanism 3 and the separation point 4 are bridged by a secondary current path 5. In this are a second thermal release 6, an electrical resistance 7 of approximately 0.4 to approximately 4 Ω for the nominal current strengths of 10 to 100 A and one in the example second separation point 8 arranged.
Another current path 9 branches off to the neutral conductor behind the components mentioned. It leads over two parallel lines, each with a third separation point 11 or fourth separation point 12, the former further with a second resistor 13 and a diode 158, and then via a second magnet mechanism 10.
The thermal triggers 2 and 6 have an opening effect on the second separation point 8 via a mechanism 14 indicated by dashed lines.
The end member of the mechanism 14 and the magnet mechanism 3 have an opening effect on the separation point 4 via a mechanism 15.
The second magnet mechanism 10 acts in a closing manner on the separation point 4 via a mechanism 16.
A mechanism 17 which opens and closes the separation points 11 and 12 is actuated by the mechanism 16 and by a part of the mechanism 15. The parts and the functions are described in detail below. In addition to the above overview, this description is preceded by the function of the circuit breaker as a whole:

The normal current flow is at the disconnection point 4 via the main current path 1. The simultaneous flow of current via the secondary flow path 5, in which the separation point 8 is also closed, is insignificant because of the resistance 7. The further current path 9 is interrupted by the, open, separation points 11 and 12.

If a short circuit occurs, the magnet mechanism 3 picks up and opens the disconnection point 4 via the mechanism 15. The main current path 1 is thus immediately interrupted. Only a significantly reduced current continues to flow via the secondary flow path 5.
If the short circuit lies in the line section between the line circuit breaker and a line circuit breaker connected downstream of it, after a certain period of time for which it is designed, the thermal release 6 also opens the second disconnection point 8 via the mechanism 14. The interruption by the line circuit breaker is now complete and final.

If the short circuit lies behind a downstream circuit breaker, this usually speaks at about the same time as the magnetic mechanism 3, but in any case long before the thermal release 2, and disconnects the short circuit point. The voltage at the input of the further current path 9 thus increases.
The separation point 11 of the further current path 9 was closed by the movement mechanism 17 when the separation point 4 was opened. As long as there was a short circuit, however, a current flow was practically non-existent, especially because of the resistance 13 immediately downstream of the isolating point 11. However, due to the voltage increase after the short-circuit point has been disconnected, a current flows such that the second magnet mechanism 10 responds. First opens the separation point 12 and, by bridging the resistor 13, it then becomes strong enough to close the separation point 4 again in the course of its movement via the mechanism 16, which is coupled to the mechanism 15. At the same time, the mechanism 17 opens the separation points 11 and 12 again.
The normal condition of the circuit breaker is now restored. All downstream consumers other than the one in whose branch the short circuit is located still have voltage.

If the overcurrent occurs, the thermal release 2 responds unless a downstream circuit breaker opens beforehand. It opens the second separation point 8 via the mechanism 14 and further opens the separation point 4 via the mechanism 15. In this case too, the interruption by the circuit breaker is complete and final.
Likewise, this can be done by operating a manual shift lever 18 coupled to the mechanism 14.

The circuit breaker is switched on again by hand in the Way that by correspondingly pivoting the hand shift lever 18 of the Mechanism 14 closes the second separation point 8 and then the magnetic mechanism 10 responds in the further current path 9 and, as already described above, the separation point 4 in the main flow path 1 closes.

So far, the circuit breaker is known in principle from DE 32 18 398, furthermore with regard to the parallel lines with the separating points 11 and 12 from DE 34 09 513 and otherwise from DE 41 18 377. Reference is made to these in addition.
The new mechanical implementation in the present example is as follows:

The main current path 1 begins at "LE" - the connection terminal in question is not shown - on a component of the separation point 4 connected to the separation point 4, namely a continuation 19 of a first bracket 20 of a spark quenching chamber 21 with which the separation point 4 is provided. A second fixed bracket 22 runs parallel to this, in front of it in FIGS. 1 to 8, with which one end of a coil 23 of the magnetic mechanism 3 is connected, in which the main current path continues behind the separation point 4. This and the main flow path 1 also include a fork 24 with two brackets 25, which closes the main flow path when the brackets 25 bear against the brackets 20 and 22 and opens the main flow path by removing the brackets 20 and 22. Contact pads are shown on the contact surfaces. The spatial design of the fork 24 can best be seen in FIG. 9.
The spark extinguishing chamber 21 belonging to the separation point 4 is of a conventional type and need not be described in detail.
In addition to the coil 23, the magnetic mechanism 3 consists of an armature 26 surrounded by it, which has a pull rod 27 with a plate 28 at one end and a striking pin 29 at the other end. The other end of the coil, which is drawn with three turns for the sake of illustration 23 is connected to a bimetal, which represents the thermal release 2, via a wide, flexible braided strand 30. The bimetal is attached to a component 31, which is again stationary, and a screw is arranged at its end as an adjustable pressure pin 60. In the component 31, the last section of the main current path 1 extends to the exit labeled "LA". There is an output terminal 133.

The secondary flow path 5 branches off from the main flow path with the second separation point 8: The one, fixed, contact is at 32 as a console on the above Continued 19 trained, the other, movable, contact 33 on one Contact member 34. From this, the bypass path 5 is continued by an in each position on it contact fields 35, a plate 36 into which the contact fields 35 merges, which, concealed in FIGS. 2 and 3, adjoins the plate 36 Resistor 7, a starting from this in a fixed structural arrangement, the second thermal trigger 6 forming bimetal and one at 37 on the bimetal welded thin dashed lines 38 shown in broken lines, the other hand at 39 the component 31 is attached, so that the secondary flow path 5 here again in the main flow path 1 flows into.

The further current path 9 branches off at 40 under prestress on the component 31 adjacent, double-bent spiral spring 41 from the main flow path 1.

The spiral spring 41 splits into two contact tongues 42 and 43 which are slightly interlocked with one another. Together with counter-contacts 44, 244, these form the third and fourth disconnection points 11 and 12, respectively. The second resistor 13, a PTC, and the diode 158, which precede the resistor 13 Overvoltage protects are arranged on a common carrier 159 with the counter contacts 44 and 244. The resistor 13 is not visible in the drawing, as is the wiring.
From there, the further current path 9 leads through a conductor 45 into a coil 46 of the second magnet mechanism 10. Following this, it is formed by a component 47 which extends to the more distant end face of the circuit breaker and ends here with a connecting terminal 48 ,

After this overview of the current paths, the following are the others mechanical parts of the circuit breaker are described.

In the mechanism 14, a support skid 52 is held by a pawl 51 on the by means of an intermediate rod 53 which can be moved from the manual shift lever 18 a push rod 54 acting on the contact member 34 is supported. The jack 51 and the support skids 52 are mounted on fixed articulated axes 55 and 56, respectively The intermediate rod 53 and the push rod 54 are articulated on both sides.

On the contact member 34, with the exception of its end carrying the contact 33 has a U-shaped cross section, acts against the protruding between the U-legs and on the U-legs articulated push rod 54 which from behind on the U-web pressing contact spring 35. In the closed state of the separation point 4, the position of the Contact member 34 determined by the contact of the contact 33 to the fixed Contact 32 on the one hand and by supporting the push rod 54 on the support skid 52 and the intermediate rod 53 on the other hand, wherein the contact spring 35 the contact forces generated and slots 58 penetrated by a fixed cross pin 57 keep the contact member 34 in the other U legs.

If the support of the push rod 54 shown in FIG. 2 is missing, the contact spring 35 pivots the contact member 34, which is then held by the transverse pin 57 at the end of the slots 58, and the separation point 8 is opened. The push rod 54 is withdrawn from the support according to FIG. 2 on the support skid 52 either by turning the switching lever 18 into the off position, resulting in a forceless contact with another point according to FIG. 3 or by the pawl 51 being actuated by the Push pin 60 of the thermal trigger 2 or the same push pin of the thermal trigger 6, which releases the support skid 52 and then pivots it back in its joint 56. The manual shift lever 18 then returns to the "off" position under the action of a leg spring 157 which bears against it and is only shown in FIG. 5.
The support runner 52 and its pawl 51 bring themselves back into their mutual position when the push rod 54 has been removed from the support point on the support runner 52 and the thermal trigger 2 and 6 respectively have been removed by moving the shift lever 18 into the “off” position has withdrawn again. A bending spring 101 acting between the two parts and a stop (not described in more detail here) serve for this purpose.
How in detail the support skid 52 is held by the pawl 51 can remain open here. One possibility is given in DE 41 18 377.
When switching on again by hand by pivoting the manual shift lever 18, the end of the push rod 54, more precisely the joint there, is first applied to the supporting skid 52 by the intermediate rod 53; then it is pushed along it, resulting in increased pressure as a result of the inclined position of the support skid 52. The push rod 54 presses the contact member 34 back under further tension of the contact spring 35 and closes the separation point 8. The shift lever 18 passes a dead center when its lever arm connected to the intermediate rod 53 assumes the extended angle with the intermediate rod 53. Beyond the dead center, the arrangement itself holds its position.
Switching off by hand takes place in reverse.

The mechanism 15, via which, as mentioned, the separation point 4 from both the magnetic mechanism 3 and can be opened by the end member of the mechanism '14, consists, seen as a whole, of a fork 24 mentioned as a make contact holding lever 59, which is mounted on an axis 61 and against the force of a directly attacking another part, tension spring 62 in the closed position of the Fork 24 is held by a pawl 63 engaging at its other end (hidden in the drawings). The armature 26 of the Magnet mechanism '3 with its plate 28 and a connecting lever 64 (Fig. 3,4) release the pawl 63 from the end member of the mechanism 14, namely the contact member 34 is pushed. The lever 59 released by the pawl 63 is swung very quickly by the tension spring 62, see below for details, and thus the fork 24 is lifted from its mating contacts on the brackets 20 and 22. The resulting spark is generated in a manner known per se by the Spark extinguishing chamber 21 extinguished. Further in detail:

The lever 59 consists essentially of a sheet metal part which is angled near the axis 61 and has a U-shaped cross section.
The fork 24, which is not shown in detail, is mounted at 131 (FIG. 9) as a lever in the lever 59, and can be tumbled and with electrical insulation. A spring 65, which is supported against a projection on the lever 59, presses onto the rear end of the fork 24, which is provided with an electrically insulating cap. In the closed position of the fork, the spring 65 is tensioned and thus a secure contact pressure is present. The tumbling storage ensures the contact of both brackets 25 of the fork; it distributes the contact pressure evenly over both.

The pawl 63 is also a lever designed as a molded plastic part. The lever is stored on a fixed axis 66. It is pulled in the locked position of the pawl by a tension spring 80. In the opposite direction, the plate 28 of the armature 23 lies against it on; at 67 the lever engages hook-shaped around the pull rod 27 under the plate 28. If the armature 26 picks up, it is thus released. The remaining force of the armature 26 is transmitted directly to the fork 24 by the striker 29, in addition to the force the tension spring 62. In the event of a short circuit that starts the magnetic mechanism 3, the separation point 4 is opened quickly accordingly.

The force arm of the above-mentioned connecting lever 64 has with the contact member 34 a pressure and tension-transmitting, movable hook connection which need not be described in detail. The load arm is duplicated, starting from the lever axis 68. The load arm 69 visible in FIGS. 3 and 4 acts further via a pressure bale 70 formed on it, which will be discussed further below. The other, shorter load arm is hidden behind the load arm 69 in FIGS. 3 and 4. Its end 130, which appears in FIG. 13, acts on the pawl 63 next to the plate 28 at 71.
If the contact member 34 opens the second disconnection point 8, it presses on the connecting lever 64. This depresses the lever of the pawl 63 and thus also triggers the opening of the separation point 4. When the second separation point 8 is closed, the contact member 34 pulls the connecting lever 64 again and swivels it back about its lever axis 68 into the normal position.
The mechanism 16 for closing the separation point 4 has the following structure:

The second magnet mechanism 10 has an armature 49, which is provided at its end with two laterally protruding drivers 50.
A sheet metal part 72 is U-shaped with a back 73 and two cheeks and is mounted on an axis 74 as a lever. The ends of the two cheeks have projections 75 under the drivers 50 of the armature 49.

If the armature 49 pulls when the second magnetic mechanism 10 is activated, the sheet metal part 72 is pivoted.
The counterforce comes from the tension spring 62 mentioned above, which acts on a bracket 76 of the sheet metal part 72, which in turn presses the lever 59 at 77 (FIG. 9) in the opening direction of the separation point 4 after the closing process.
The lever 59 protrudes with its lever arm, which is largely concealed in the drawings, between the cheeks of the sheet metal part 72 and abuts the back 73 of the sheet metal part 72 from the inside. The sheet metal part 72 engages the lever 59 here in order to pivot it back from the open position of the separation point 4 into the closed position under tension of the very strong tension spring 62, which is held by its holder 78 with an adjustable tensile force.
The arrangement of the axis 74 in the region of the lever arm of the lever 59 results in the best possible power transmission from the sheet metal part 72 to the lever 59.

2 shows the end of the pivoting back of the lever 59. Detected shortly before the end the upper edge of the lever 59 the lower edge of the pawl 63 and presses it above. Finally, the pawl 63 snaps in front of the counter surface facing it End of the lever 59 a.

After the second magnet mechanism 10 has become de-energized, the tension spring 62 pulls the sheet metal part 72 and this pulls the armature 49 back to the starting position shown in Fig. 3.

The described resetting process has a lead in mechanism 17 as follows:

A contact carrier 81 is pivotably arranged on a fixed axis 79 (see in particular FIG. 8). It is a molded part made of plastic, in which the spiral spring 41 with the contact tongues 42 and 43 has a suitable seat. It is held in the seat by an insert part 156 which, with a cylindrical part, engages axially in the one bend of the S-shaped spiral spring 41 and is positioned approximately in the pivot axis 79 of the contact carrier. The other, smaller bend extends between the cylindrical part and the fixed component 31. It remains quite unchanged even when the contact carrier 81 is pivoted. The torque about the axis 79, which is generated by the biasing spring 41 on the component 31 at 40 and is exerted on the contact carrier 81, is held by a first lever arm 82 of the contact carrier 81 supported on the back of the lever 59.
The support is omitted if the lever 59 pivots away when the separation point 4 is opened. However, when the line circuit breaker is completely switched off, ie when the second separation point 8 is open, it is replaced by the above-mentioned pressure pad 70, which then assumes a position in which a second lever arm 83 of the contact carrier 81 abuts it (FIG. 3).

If, in the event of a short circuit and the second separation point 8 remains closed, the separation point 4 is opened (FIG. 4) and the previous support of the contact carrier 81 by the lever 59 is omitted, the spiral spring 41 pivots the contact carrier 81 with the contact tongue 51 until the contact carrier 81 strikes on the one named driver 50. The contact tongue 42 lies on its counter contact 44. However, due to the interlacing of the two contact tongues 42 and 43 against one another, the contact tongue 43 does not yet lie on its counter contact 244. The interlocking is ensured by different heights of a support 84 (FIG. 8). which is formed in the contact carrier 81 for the contact tongues 42 and 43, respectively.
The separation point 11 has thus been closed and the separation point 12 has remained open.

If the magnetic mechanism 10 receives current as a result of the elimination of the short circuit, it is initially throttled by the resistor 13. It is sufficient, however, to pivot the sheet metal part 72 only slightly against the force of the spring 62 and thus to tighten the armature 49 so much that the stop of the contact carrier 81 on the driver 50 is withdrawn and also the contact tongue 43 on its mating contact 244 sets and thus closes the separation point 12. Now the resistor 13 is bridged, and with the now flowing full current, the magnetic mechanism can pull the lever 59 back into the closed position of the separation point 4. In the last section of this movement, the lever 59 abuts the lever arm 82 and thus pivots the contact carrier 81 into the open position of the separating points 11 and 12. The end position shown in FIG. 2 after the return process is immediately left by the sheet metal part 72 and the armature 49. The tension spring 62 pulls both parts back into their other end position determined by a stop.
The same happens when the circuit breaker is switched on by hand. In place of the loss of the support of the contact carrier 81 on its first lever arm 82, the loss of the support on the second lever arm 83 is replaced by the pressure pad 70 when the second separation point 8 is closed by means of the manual shift lever 18.
With the adjustable force of the tension spring 62 and with the strength of the second resistor 13, the switching threshold of the second magnet mechanism 10 is determined, in the present example to 130 volts. This prevents a restart if the short-circuit point has not really been disconnected but the short-circuit has only decreased.

With regard to the installation of the circuit breaker are initially independent handling assemblies have been manufactured independently, and this are, in contrast to the prior art, without using a scaffolding of the two walls of the Switch housing as a holder, partly also with mutual support, brought into their intended position and fastened. For that are on the housing walls some precautions have been taken. Some also serve in the Fixed axles mounted on the housing walls beyond their axis function of the bracket. Appropriate precautions have been taken on the assemblies, also for their mutual support.

A first assembly 85 comprises the parts 6, 60, 7, 35, 36.
A second assembly 86 includes parts 18, 34, 51-58.
Both assemblies are shown together in FIGS. 5 to 7.

5 shows the resistor 7 in the new form of a steel foil strip provided with an insulating coating, which is laid as a winding 87 around a plate 88, preferably made of copper. The stripped, inner end of the winding 87 of the steel foil strip bears against the plate 88. It forms the one contact. The other contact is the plate 36 already mentioned elsewhere. To this, the other, designated 100, stripped end of the steel foil strip is pressed over its entire width by the one edge of a U-shaped casing 89 of the winding 87, which here, wherein the end 100 is interposed, abuts the plate 36. The contact pressure is brought about by three tabs 92 projecting on the edge, through elongated holes 90 in the steel foil strip and through openings 91 in the plate 36 and behind these set tabs 92 (a bend is shown instead of the interleaving). In the same way, the other edge of the U-shaped border 89 is connected directly to the plate 36 by means of tabs 93 and openings 94. The winding 87 is thus firmly enclosed all around in a kind of box. The plate 36 as the one wall of the box projects laterally beyond the border 89. It has the contact spring 35, which was also mentioned above.
The box protrudes somewhat over the winding 87 on its two open end faces. The plate 88 still protrudes from the box in the two open end faces. The bimetal which forms the said second thermal release 6, is bent at a right angle and is always guided at a distance from the casing 89 is attached to a bracket 95 which is bent at the bottom of the bracket 95. In addition to the drawings, it is provided in the place of a hole 96 with a pressure pin corresponding to the pressure pin 60.
The steel foil tape of winding 87 has a resistance of approx. 1.3 Q at 19 mm width, 0.06 mm thickness, 2400 mm length and a specific resistance of the material of 0.7 Ω / mm ² m.
The winding 87 represents an object that is easier to manufacture, more compact and easier to assemble than a copper wire coil, which can also be easily configured into an overall component of inherent strength, such as the first assembly 85 here.
Various precautions for the installation of this module are described below in connection.

The second assembly 86 consists essentially of the mechanism 14 for Opening and closing the second separation point 8. The relevant parts are shown in FIG. 5 shown separately and provided with their reference numerals already mentioned. Here two rigidly connected to each other via spacers are described Wall parts 97 and 98, between and on which the parts are stored and the give the assembly 86 the form of an independent unit. The spacers with exceptions, reference number 99, also have other functions, namely those of the hinge axes 55 and 56, the cross pin 57 and an end stop 102 for the manual shift lever 18.

The assemblies 85 and 86, see FIGS. 6 and 7, are set up as follows:
A receptacle 103 for the assembly 85 is formed on the wall part 97 on the outside; this lies in the receptacle 103 on the wall part 97 and is additionally held on three sides. On the fourth side, the protruding portion of the plate 36 extends over the space between the wall parts 97 and 98. Two hooks 104 on the wall part 98 grip two recesses 105 of the plate 36 therein. The contact spring 35 lies in the space on a counter surface 106 of the Contact member 34 on. In the receptacle 103, the assembly 85 is further held by catches 107 engaging on the lower edge of the casing 89 and laterally by engagement of two humps 108 in two grooves 109 on the lower and the upper edge of the casing 89. It cannot be seen, but is explicit The further interaction between parts of the two different assemblies, namely the second thermal release 6 and the pawl 51, should be mentioned. In order to bridge lateral displacement, this is provided with a side arm 10 (FIG. 5).

The assemblies 85 and 86 were first assembled during the final assembly of the circuit breaker and then inserted together into the half box of the housing, designated 111 (FIG. 10).
Various internals are formed in this to enable the assemblies 85 and 86 to be fastened and seated precisely in the housing:
A sleeve 112 provides on the end face an abutment for the wall part 97 and a continuation for a hollow shaft 113 which is arranged on the wall part 97 and on which the manual shift lever 18 is mounted. The sleeve 112 and the hollow axis 113 extend through the entire width of the housing space. After placing the other half box 114 of the housing (Fig. 13), which lets the handle of the hand lever 18 protrude through a recess 155, a connector bolt is inserted through a bolt hole 115 in the half box 114, the hollow shaft 113 and the sleeve 115, which as a bolt hole opens into the wall of the half box 111, and fastened. This is the main mounting of assemblies 85 and 86 in the housing.

The following seats also exist:
The plate 88 engages the sleeve 112 with a semicircular cutout 116, and on both sides of the cutout 116 the upper edge 117 of the plate 88 is gripped between a strip 118 formed in the half box 111 and a strip 119 formed on the wall part 97. The lower edge 120 of the plate 88 is enclosed between a bar 121 formed in the half-box 111 and a shoulder 122 formed on the wall part 97. The plate 88 is also seated on the wall part 97 on two trestles 123. A plate projecting on the wall part 97 124 extends under the ledge 121 to the wall of the half-box 111. A column 125 extends from this wall into the housing; it is in engagement with the assembly 86 by means of a mandrel 126 at a location not shown. Finally, the wall part 98 still has interventions with the half box 111, not shown.

A third assembly 127 essentially consists of mechanisms 16 and 17 with the parts 41.46.49-50.59.61-62.65.71-84. It is also more integrated into the mechanism 15 belonging part 63,66,67. The parts of the assembly are shown assembled in Fig. 8 and 9. They are stored in a largely only shown in Fig. 11 Frame structure 128 made of plastic.

A fourth assembly 129 essentially comprises the mechanism 15 with the Parts 19-23, 26-32, the spark quenching chamber 21, the line and connection parts 31 (including part 2), 47, 48 and the terminals of the conductor, namely an input terminal, not visible in the drawings, at 132 at the end of the part 19 (LE) and the output terminal 133 at the end of part 31 (LA).

When installing the circuit breaker, the modules 127 and 129 first brought into their intended position to each other. For that had to go through Cross movements and a longitudinal movement of the assembly 127 with the fork 24 their brackets 25 are inserted under the coil 23 into the arcing chamber 21, the hook-shaped wrap 67 formed on the pawl 63 the pull rod 27 of the Anchor 26 are brought under the plate 28 and the output terminal 133 are brought into their seat 134 in the frame structure 128, wherein the sloping section of the component 31 over a sloping section 135 and below an eyelet 136 of the frame structure 128 and a side arm 137 of the component 31 for formation the system 40 was placed over the spiral spring 41. Finally, that was End 138 of component 47 gripped in a clamp 139 in the manner shown in FIG. 8 and so connected to the coil 46.

The two assemblies 127 and 129 were placed together in the half box 111. The assembly 127 was given a defined seat by the eyelet 136 a hollow pin 140 and another eyelet formed in the frame structure 128 141 was inserted on a hollow pin 142 of the half box 111. For the assembly 129 are a hollow pin as corresponding precautions in the half box 111 143 and a bezel 144 for a slightly protruding sidewall the spark quenching chamber 21 provided, the same, parallel wall in Fig. 12 with 145 is designated. The counterpart on the assembly 129 to the hollow pin 143 does not appear in the drawings. However, Figs. 11 and 12 show one in the assembly 129 formed sleeve 146, which extends through the entire width of the housing extends and through which at the end of assembly a connector bolt from a bolt hole 147 in the half box 114 to a corresponding bolt hole was put in the half box 111. In the same way connector bolts were through the eyelet 136 and the hollow pin 140 and through the eyelet 141 and the Hollow pin 142 inserted; for this there are 114 bolt holes in the half box 148 or 149 as well as hollow spigots protruding on the inside of the wall, the remaining width bridge the housing between the eyelets 136 and 141. The same applies to the Hollow pin 143; a bolt hole 150 is assigned to this. Next is inside on the wall of the half-box 114 a mirror image of the border frame 144 Binding frame for said parallel wall 145.

In addition to the assemblies, a few parts had to be assembled individually.

Of these, the connecting lever 64 is shown in FIG. 13, as well as a rod 151 serving to indicate a fault.
The connecting lever 64 acting from the assembly 86 into the assemblies 127 and 129 had to be inserted with its force arm between the wall parts 97 and 98 and had to be mounted in a bearing 152 of the half-box 111 with an axle stub of its lever axle 68. The opposite bearing 154 for the other axle stub is located in the half box 114.
The rod 151 is inserted with a bushing 160 onto a lateral projection 161 of the fork 24 and placed in a flat groove 153 formed in the wall part 98, in which it has a guide. The rod 151 blocks with its upper end the manual shift lever 18 when the separation point 4 is glued and no longer opens. An analog fault indicator is automatically present for the second separation point 8 in such a way that the intermediate rod 53 and the push rod 54 then hold the manual shift lever 18 clearly in front of its end position in the extended position. This is an advantage resulting from the new arrangement.

More generally, the one contact 25 of the separation point 4 is on a movable one Link 24 arranged, from which a rod 151 articulated to it to the Hand switch lever 18 of the circuit breaker is placed when the disconnection point is closed 4 ends in the swivel path of the load arm of the manual shift lever 18 such that if the contact 25 sticks, the hand control lever 18 as a fault indicator in blocked its swivel path, and the manual shift lever 18 is via an intermediate rod 53 and a push rod 54 with one contact 343 of the second Separating point carrying movable contact member 34 connected such that at Adhesion of the contact 33, the intermediate rod 53 and the push rod 54 in stretched Hold the hand control lever 18 as a fault indicator before it reaches its end position.

Strand 38 was another from one assembly to another reaching part to be attached to component 31 at 39 by means of a clamp.

The changes made in the line circuit breaker described in relation to the prior art from which it is based have complex purposes.
By the reversal of the current direction in the main flow path 1 and the secondary flow path 5, based on the structural arrangement according to FIG. 2 of DE 41 18 377 and FIG. 2 of the present application, the output LA was placed on the side on which the third and the fourth isolating point 11 and 12 are set up, these could be placed there, reversing the sequence of the devices also in the secondary flow path 9, directly on the main flow path 1, as a result of which the main flow path 1 forming in FIG. 2 of DE 41 18 377 running in a rear plane, dashed component 19 as component 31 in Fig. 2 of the present application could be moved to a front plane, with the result that the movement mechanism 14 could also be concentrated in the front plane and thus firstly a division into the independent assemblies 85 and 86 was possible and secondly, the operative connection of the contact member 34 via the connecting lever 64 with the pawl 63 and the lever arm 83 of the contact carrier 81 could be simplified in terms of construction and assembly technology, which in turn was more likely to be followed by the filing into the further assemblies 127 and 129.

The total number of parts has been reduced from 151 to 107.

The construction according to the state of the art, on the other hand, includes an overall supporting frame, on which the parts are attached and installed in laborious, lengthy manual work. The scaffold with the installed parts is inserted as a whole into the housing; on the walls are other bearings u. Like. trained. According to the preferred embodiments of the invention, the assemblies 85; 86; 127; 129, which can be produced independently and largely by machine, as a whole are only inserted as packages in one half-box 111 of the housing and the other half-box 114 is placed over them.
There is the further advantage of flexible production with the option of installing individual or multiple assemblies in changing selections, especially for different nominal currents.

The contact arrangement with the spiral spring 41 and the resistor 7 have been completely redesigned and can also be used for other purposes. The latter also applies to the basic assembly technology with assemblies only inserted between two parallel walls of a flat circuit breaker housing.
The outer functional picture of the circuit breaker has been preserved with regard to the general installation technology. The input terminal and the output terminal are located on the end faces, the neutral conductor terminal is located at a conventional location, the manual shift lever 18 is arranged and operated as usual, etc.

The basic structure of the circuit breaker according to FIGS. 14 to 22 and its Function are the same as described for FIGS. 1 to 13. The reference numerals are so far adopted.

Structural differences from the first embodiment, the one on top hat rails circuit breakers to be attached result from the adaptation to a circuit breaker to be attached to busbars.

14 to 22 is also assembled in the final assembly from four assemblies 85, 86, 127 and 129, which in one from two half boxes 111 and 114 existing housing are installed.

Fig. 14 shows the half box 111, in which the modules are inserted during assembly be after inserting the modules 85 (hidden) and 86 and before Insert the assemblies 127 and 129, which are already assembled together. 15 shows the half box 111 with the fully inserted modules 85, 86, 127 and 129 before inserting two items, a rod 151 and one Connecting lever 64 and before overlaying the other half box 114.

16 and 17 do not show the assembly sequence. They show the interaction structural adjustments on the opposite side to FIGS. 1 and 2.

As can be seen in FIGS. 14 and 16, the housing of the circuit breaker has a rear wall 201, half of which is formed in the two half boxes 111 and 114.
Between the studs 202 projecting on the rear wall and further projections 203 and 204, three seats 205, 206 and 207 are formed for three busbars of one phase each. The circuit breaker can be fitted with these seats, which are adapted to the width of the busbar, precisely on the relevant three busbars. With a hook-shaped extension 208 of the projection 203, it engages under the busbar of the neutral conductor, whereby it can be adapted with a removable insert part 209 of single and double thickness to the busbar and a nose 215 lies above the busbar. At the other end, a latching hook 210, which also has to be adapted to the thickness of the busbar, rims under the busbar of the phase there.
The circuit breaker is placed on the busbars by first pushing it with the hook-shaped extension 208 under the busbars of the neutral conductor and then swinging it onto the other busbars; at the end the hook 210 snaps under it.
The hook-shaped extension 208 and the latching hook 210 are formed partly on the half-shells 111 and 114 and partly on the assemblies 127 and 129, which contribute to the housing wall with narrow wall sections 211 between the half-shells 111 and 114 which have corresponding recesses here.

Part of the formation of the hook-shaped projection 208 and the nose 215 15 on the half-box 114 and on the other part on the assembly 127 best to recognize. They close together laterally. The insert part 209 is on the assembly 127 held and overlaps the half box 114. In the event of a busbar of normal thickness does not directly touch the hook-shaped Extension 208, but the insert part 209. In the case of a busbar The insert 209 is removed twice the thickness and the busbar lies immediately between the hook-shaped extension 208 and the nose 215.

The latching hook 210 can best be seen in FIGS. 16 and 17:
In two sockets 213 formed on the half-boxes 111 and 114 there is a flat spiral spring 214 made of plastic, which is made in one piece with two hook legs 217 having an inclined surface 216.
To adapt to a busbar of single or double thickness, the spiral spring 214 is provided with a resilient part 219 having two lateral projections 218 and the socket 213 is provided on both of its parts with two notches 220 with which the projections 218 can be selectively brought into engagement , namely by pushing back the resilient part 219 so that the projections 219 emerge rearward from the incisions 210 previously made, and displacing the spiral spring 214 in the socket 213.
For both positions, a guide 221 is provided in the further projections 204 of the two half-boxes 111 and 114 for a connecting piece 222 emerging laterally on the two hook legs 217.

When the line circuit breaker is swung open onto the busbars, the inclined surfaces 216 of the hook legs meet the outermost busbar edge. The hook 210 is thereby pushed back until it engages under the busbar.
To remove the circuit breaker from the busbars, the tip of a screwdriver can be inserted into a bracket 223 and the spiral spring 214 bent back using a semicircular bracket 224 formed on the spiral spring 214 as a counter bearing.
In the manufacturing phase, the bending spring 214 is held on the assembly 129 in a manner not shown until final assembly.

On the seat 205 for an outer busbar is as a contact to the electrical Connection to this busbar, a contact clip 225 is arranged.

The contact clip 225 is formed by bending a sheet metal strip from a simultaneously resilient conductor material in a U-shape and then bending it back to the one U-leg and then bending it to form a tab 226 lying in the extension of the back of the contact clip. The two U-legs of the clip are marked with 227 and 228, the back with 229 and the back bend with 230.
The flag 226 is connected to a further flag 231 of a further conductor strip 232. After a short bend within the plane, this is angled out of the plane to form a short intermediate section 233 and then lies in a flat border 234 which is formed on a frame structure 235 of the assembly 129. The continuation in assembly 129 will be discussed below.
On the half-box 111, see FIG. 1, a counterpart 236 to the surround 234 is designed in the form of ribs 237 and 238. In the fully assembled state, these enclose the flat surround 234, so that the further conductive strip 232 is covered here by a bare cover the wall of the half box 111 is boxed out.

When handling the assembly 129, the flags 231 and 226 and the contact clip 225 protrude freely.
In the fully assembled circuit breaker, the contact clip 225 is held in such a way that its legs 227 and 228 protrude through two openings 239 and 240 in the rear wall 201 and its back 229 is loosely gripped from the side in each of the two half-shells 111 and 114 between a relatively narrow side support 241 for the inside and a counter support 242 for the outside of the back.
This loose holder allows the contact clip to precisely adjust the position of the busbar to compensate for tolerances and to apply its legs 227 and 228 to the narrow sides of the busbar with correspondingly undiminished contact pressure. A substantial part of the tolerance compensation is made possible by the loop created with the back bend 230.
The leg 227 of the contact clip 225 arranged on the seat 205 for a busbar lies between the hook legs 217 of the latching hook 210 which are intended to engage under this busbar.

The openings 239 and 240 and the support 241 and the counter-holder 242 also have the half-boxes 111 and 114 at the locations of the busbars of the other two phases, ie at the seats 206 and 207.
Here the unused openings 239 and 240 are closed by insert parts 243 and 244. The insert parts 243 and 244 of the two openings 239 and 240, which belong together, are connected to one another on the inside of the rear wall by webs 245 and grip behind the rear wall with strip-shaped projections 246. The associated insert parts are drawn in FIGS. 14 and 16 in their spatial assignment to the assemblies 127 and 129. But they are separate parts from them.

18, the contact clip 225 is arranged on the seat 206 and on the seats 205 and 207 are the openings for the legs of a contact clip with insert parts 243 and 244 closed. 19, the contact clip 225 is located the seat 207.

In all three arrangements of the contact clip 225, the back 229 of the contact clip, the flag 226 and the further flag 231 are aligned parallel to the surface of the rear wall 201 and covered by an intermediate wall 247, ie they are separated from the rest of the housing space.
The intermediate wall 247, like the rear wall 201, is each formed half in the half-boxes 111 and 114. The cylindrical protrusions 248 on the rear wall 201 and the intermediate wall 247 are production-related and have no function in the line switch.
The gap appearing in FIG. 14 in the intermediate wall 247 at the exit of the further conductor 232 is closed by the frame structure 235 mentioned.

20 shows the arrangement of the contact clip 225 with respect to the further lug 231 and the further conductor 232, as is provided according to FIGS. 17, 18 and 20, for itself.
17 and 20 on the left, the free ends of the two tabs 226 and 231 are connected to one another, for example spot welded.
In the arrangement according to FIGS. 18 and 20 center, with the contact clip 225 oriented in the opposite direction, the end of the flag 226 adjoining the contact clip 225 is connected to the free end of the flag 231.
In the arrangement of the contact clip 225 according to FIGS. 19 and 20 on the right, with the same orientation of the contact clip as in FIGS. 18 and 20 center, the end of the flag 231 adjoining the further conductor strip 232 is at the free end of the flag 226 connected.

The orientation of the contact clip corresponds in the half boxes 111 and 114, respectively the arrangement of the different sized openings 239 for the sole U-legs 227 and 240 for the U-leg 228 and the back bend 230 together.

21 illustrates the continuation of the further conductive strip 232 in the assembly 129.
The supporting mechanical part of this assembly is the already mentioned plastic frame structure 235. Together with the half boxes 111 and 114, it creates the mounting of a line component 249 and an essentially identical line component 250, which have two fixed contacts 251 of the main disconnection point of the line circuit breaker. Together with the half boxes 111 and 114, it also creates the holder for two spark quenching chambers 21, into which the line components 249 and 250 extend. Finally, it has the mechanically load-bearing part of a magnetic mechanism 3 for opening the separation point and, in the form of a chamber 254, the mechanically load-bearing part of a fixed contact 32 of a second separation point 8. In detail:

The flat border 234 for the further conductor strip 232 already mentioned is formed on the part 253, which is designed in principle as a ring cylinder, parallel to the axis thereof and angled at the upper end at 255 in the surface just to the side. A matching bend can be seen at the counterpart 236 in the half-box 111 at 256.
The corresponding angled further conductor strip 232 is then angled out of the surface at 257 into the assembly. It continues through further bends and angles into chamber 254, where it bears contact 32 at its end. In front of the chamber 254, it is plugged with a bore 258 onto a fixed bolt 259 of the frame structure 235 and thus held.

The line component 249 is attached to the section of the further conductor strip 232 angled at 257 via a rectangular plate 260. The plate 260 has a free projection on both sides, but only on the side of the bend 257 next to the curvature of the bend.
At the other end of the line component 249 there is also a rectangular widening 261 with free lateral protrusions.
When assembling the assembly 129, the parts pulled apart in FIG. 21 are assembled in the opposite direction to the pulling apart. The protrusions of the plate 260 and the widening 261, which are at the rear in the drawing, arrive at the frame structure 235 in a plug-in receptacle 262 or 263. The protrusions at the front in the drawing arrive in a receptacle 264 or a plug-in receptacle 265 of the half-box when the circuit breaker is finally assembled 111 (Fig. 14).
In the same assemblies, the arcing chamber walls 145 are placed in the frame 266 of the frame structure 235 or 144 of the frame 111.

The line component 250 is provided with the same plate 260 and the same widening 261 as the line component 249. The lateral protrusions are here taken in the same way in plug-in receptacles of frame structure 235 or plug-in receptacles 264 and 265 of half-box 114.
The same applies again to the arcing chamber walls 145 and their border frames, of which only the border frame 144 appears on the half-box 114 in the drawings.
When the line component 250 is assembled with the frame structure 235, the coil 23 of the magnetic mechanism 3 connected to the plate 260 is introduced into the annular cylinder space of the mechanically supporting part 253, which for this purpose has a slot 267 in its wall for the connection end 268. The other end 269 is connected to a bimetal 2 by means of a wide strand 30 indicated by dashed lines in FIG. 9. The bimetal 2 is held mechanically by a component 31 rigidly connected to the output terminal 133 of the circuit breaker; the output terminal 133 itself receives its fixed arrangement through a seat in the assembly 127 when assembling the assemblies 127 and 129 before they are inserted together into the half-box 111 (FIG. 14). A cable guide 270 is provided for the cable to be connected to the output terminal 133, for example in the extension of the output terminal.

In the assembled state of the assemblies 127 and 129, the two contacts 251 lie over two brackets 25 connected as a fork 24, and a pawl 63 lies with a hook-shaped grip 67 under a plate 28, which the anchor 26 inserted into the central cavity of the supporting part 253 of the magnetic mechanism '3 at its end.
In the closed position of the separation point, the fork 24 rests with the brackets 25 on the contacts 251 and connects them. The contact is opened in that the armature 26 of the magnetic mechanism 3 moves the pawl 63 via its plate 28 and the hook-shaped wrap 67 and this releases a spring to move the fork 24 away from the contacts 251.

Claims (15)

Line and / or device circuit breaker against overcurrent and short circuit, which has a main current path (1) which can be separated (4) by means of a magnetic mechanism '(3) which responds to short circuit and by means of a slower movement mechanism' (2) which responds to overcurrent,
the isolating point (4) of the main current path (1) actuated by the magnetic mechanism (3) responding to short circuit is bridged by a secondary current path (5) with an electrical resistor (7) and a second isolating point (8), which is separated by the said (2) and / or a further slower movement mechanism (6) is to be opened, and a device for closing the first-mentioned disconnection point (4) if the short circuit is eliminated before opening the second disconnection point (8) is provided,
which consists of a further current path (9) which branches off behind the second separation point (8) to the neutral conductor or the conductor of another phase and has a third separation point (11) which is coupled to the first-mentioned separation point (4) in such a way that it passes through it closes said magnetic mechanism (3), which is opened, and which can be opened by closing a second magnetic mechanism (10) arranged in said further current path (9) while closing the first-mentioned separation point (4),
wherein a second resistor (13) is connected in series with the second magnet mechanism (10) and a fourth disconnection point (12) is arranged in a line bridging the resistor (13) and is coupled to the second magnet mechanism (10) in such a way that at a the fourth part (12) is closed during the first part of the armature movement,
characterized in that the first-mentioned separation point (4), the first-mentioned magnetic mechanism (3) and the first-mentioned slower movement mechanism (2) are arranged in succession in the main flow path (1) in the direction from the entrance to the exit,
that the second separation point (8), the resistor (7) and the further slower movement mechanism (6) are arranged in succession in the secondary flow path (5) in the direction from the entrance to the exit,
and that the third separation point (11), the second resistor (13) and the second magnet mechanism (10) are arranged in succession in the said further current path (9) towards the neutral conductor or the conductor of another phase. Circuit breaker according to claim 1,
characterized in that the main current path (1) behind the first-mentioned slower movement mechanism (2) is formed by a fixed component (31) and said further current path (9) by the application of a spiral spring (41) under prestress on the component (31) from branches off from the main current path (1), which splits into two contact tongues (42; 43) forming the movable contacts of the third (11) and the fourth separation point (12) and is held in a pivotably mounted contact carrier (81),
and the two mating contacts (44) are arranged in the path described when the contact carrier (81) is pivoted from the contact tongues (42; 43), being offset in the direction of travel and / or the contact tongues (42; 43) are interlaced such that the third separation point (11) can be closed and the fourth (12) can be opened and the fourth separation point (12) can only be closed when the contact tongue (42) of the third separation point (11) is slightly bent,
the contact carrier (81) pivoted in one direction by the force of the spiral spring (41) via a lever arm (82) arranged thereon in the manner mentioned for the third (11) and the fourth separation point (12) with the first separation point ( 4) and the second magnet mechanism (10) and is preferably coupled (64) to the second separation point (8) via a second lever arm (83) in such a way that when they are opened, the third (11) and fourth separation point (12) to open. Circuit breaker according to claim 2,
characterized in that the spiral spring (41) is bent in an S-shape and that one bend extends around the geometric pivot axis (79) of the contact carrier (81) and the other bend is between the pivot axis (79) and the fixed one Component (31) extends, the bending spring preferably being held in the contact carrier (81) by an insert part (156) which engages in the first-mentioned bend with a curve adapted to this and is latched into the contact carrier (81). Circuit breaker according to one of claims 1 to 3,
characterized in that the first-mentioned resistor (7) consists of a band (87) made of, preferably poorly conductive, metal, which is wound with an insulating layer between the turns, and the winding (87) is surrounded by a border (preferably on four sides) surrounding it ( 89, 36) is designed as a compact component, which is further preferably provided with a contact spring (35) and a holder (95) of said further slower movement mechanism (6) rigidly connected to said plate (88) and this movement mechanism (6) itself is designed to form an independent assembly (85). Circuit breaker according to one of claims 1 to 4,
characterized in that it has a flat housing with two relatively large parallel walls, preferably two flat half-boxes (111; 114), and the functional devices located in the housing are predominantly in the form of assemblies (85; 86; 127; 129) are present, which are placed as packages on one of the large-area walls, preferably inserted in one half-box (111), and have been covered with the other large-area wall, preferably half-box (114), and theirs for overlapping, in particular moving, mechanical components (2; 25; 33; 35; 47; 110; 137) from one assembly (85; 86; 127; 129) into the other required exact positioning and holding by adapting to each other (104/105; 108/109; 117 / 1 19; 120/122; 120/123) and / or adaptations interacting with the two parallel walls (112/116; 117/118; 120/121; 136/140/148; 141/142/149; 143/150 ; 146/147/144/145). Circuit breaker according to claim 5,
characterized by internals (112; 118; 121; 125; 126; 140; 142; 143; 144) formed on the walls, preferably in the form of strips (118; 121), frames (144), columns (125), thorns ( 126) and / or pins (140; 142; 143), and bearings (152; 154) formed in the walls and / or bolt holes (115; 147; 148) aligned in the assemblies with bolt passages (113; 136; 141; 146) ; 149; 150) to form the mentioned adjustments. Circuit breaker according to claim 5 or 6,
characterized in that the former resistance (7), preferably together with the further slower movement mechanism (6), the movable contact (33) of the second separation point (8) and the parts (18, 34, 51-58) that move and hold it, the movable contact (24, 25) of the first-mentioned separation point (4), the second magnetic mechanism (10) and the third (11) and the fourth separation point (12) and the second resistor (13) and or the fixed contacts (20, 22; 32) of the former (4) and the second separation point (8), the former magnetic mechanism (3) and preferably the former slower movement mechanism (2) are each grouped together in an assembly (85, 86, 127 or 129). Circuit breaker according to claim 7,
characterized in that a contact spring (35) extends from the first-mentioned assembly (85) into the second assembly (86) and bears against a contact member (34) of the second separation point (8), a pawl (51) with a side arm (110) overlaps from the second assembly (86) into the former assembly (85) and interacts with the further slower movement mechanism (6), the first-mentioned slow movement mechanism (2) overlaps from the fourth assembly (129) into the second (86) and interacts with the pawl (51) there, a side arm (137) of the fixed component (31) extends from the fourth assembly (129) into the third (127) as a system (40) for the spiral spring (41), a line component (47) extends from the fourth assembly (129) into the third (127) and is inserted here into a terminal (139), and or a connecting lever (64) as an individually assembled part from the second assembly (86) engages in the third (127) and between the contact member (34) in each case and a pawl (63) and a lever arm (83) of the third (11) and fourth separation point (12) on the other hand acts. Miniature circuit breaker according to one of Claims 1 to 8,
characterized in that , for its attachment to busbars of an electrical distributor, it has at least one fastening element (208) arranged on its top or bottom, which engages under one of the busbars, at least one on or near the opposite side and / or on the rear, on one has another fastening element (210) engaging the busbars and at least one resilient contact leg to be placed on one narrow side of one of the busbars or a contact clip (225) to be applied with two legs on both narrow sides, from which a conductor strip (226, 231, 232) along a rear wall ( 201) and then along a side wall (111) of the circuit breaker housing and in parallel to it, the contact leg or legs (227; 228) of the contact clip (225) having one opening or two openings (239; 240) protrudes or protrude in the rear wall (201) and the rear wall nd each has an unused breakthrough or two unused breakthroughs (239; 240) also at the locations of the busbars of the other two phases. Miniature circuit breaker according to claim 9,
characterized in that the contact leg or the contact clip (225) has a flag (226) forming a first section of the conductor strip (226, 231, 232) and this is connected to a further flag (231) of a further conductor strip (231, 232), which at the end of the further flag (231) laterally from the course along the rear wall (201) and in parallel to the rear wall (201) is angled or via an intermediate section (233) into the course along the side wall (111) of the housing, and that the two flags (226; 231) have such a length that the angular position is close to the longitudinal center of the circuit breaker
in the case of the assignment of the contact leg or the contact clip (225) to the one outer busbar of the three phases (FIG. 4), the two flags (226; 231) overlap with their free ends,
in the case of the assignment of the contact limb or the contact clip (225) to the middle busbar of the three phases (FIG. 5), the flag (226) of the contact limb or the contact clip (225) is oriented the other way round and adjusts itself to the contact limb or the end of the contact clip (225) overlaps the free end of the further lug (231)
and in the case of the assignment of the contact leg or the contact clip (225) to the other outer busbar of the three phases (FIG. 6) the free end of the flag (226) of the contact leg or the contact clip (225) conforms to the angle subsequent end of the other flag (231) overlaps. Circuit breaker according to Claims 5 and 9 or 10, in which one (129) of the modules each has the fixed contact (251; 32) of a first and a second separation point, a first magnet mechanism (3) and preferably a first slower movement mechanism (2) .
characterized in that the contact leg or the contact clip (225) and the conductor strip (226, 231, 232) are part of the latter assembly (129) and a plastic frame (235) of the assembly (129) near the longitudinal center of the circuit breaker is a flat, one-sided has an open enclosure (234) for the said further conductive strip (232) which is angled into the course along the side wall and which, together with a counterpart (236) on the adjacent side wall (111) of the housing, has a flat channel which completely encloses the conductive strip (232) here forms until the conductor strip (232) is angled (257) into the assembly, where it is held
(258/259; 260/262; 261/263) and leads to said fixed contacts (251; 32) of the first and the second separation point, preferably via further angulations into a chamber (254) formed in the frame structure (235) leads in which he carries the said fixed contact (32) of the second separation point. Miniature circuit breaker according to claim 11,
characterized in that the border (234) of the further conductor strip (232) on the frame structure (235) of the assembly (129) is axially parallel and structurally formed together with a mechanically load-bearing part (253) of said first magnet mechanism (3) and on End, before it is angled (257) into the assembly, is angled (255) briefly parallel to the adjacent side wall of the switch housing. Miniature circuit breaker according to claim 11 or 12,
characterized in that at the angular deflection (257) into the assembly (129), preferably via a plate (260) projecting on one or two sides, a part (251) of the fixed contact (known as a double contact) 251) of the first separation point-carrying line component (249) is attached, which extends further as an arm into an extinguishing chamber (21) which also belongs to the assembly (129), the plate (260) preferably projecting with its projection or projections into one Narrow plug-in receptacle (262) of the frame structure (235) and possibly engages in a receptacle in the adjacent side wall (111) of the housing, preferably also the widened end (261) of the arm likewise with the lateral protrusions in plug-in receptacles (263; 265) of the frame structure (235) and the side wall (111) engages. Circuit breaker according to claim 13,
characterized in that the other part (251) of the fixed contact (251) of the first separation point is arranged on a substantially identical line component (250) which is essentially in the same way via a plate (260) and a widening (261) in Plug-in receptacles (264; 265) of the frame structure (235) and the, other, side wall (114) of the housing is held and to which, on the plate (260), the coil (23) of said magnet mechanism (3) is connected, the other end (269) of which is connected to said slower movement mechanism (2) and an output terminal (133), which preferably still belong to the assembly (129). Miniature circuit breaker according to one of Claims 9 to 14,
characterized in that the housing consists of two flat half-boxes (111; 114), which have half of the rear wall (201) and the openings (239; 240), possibly also the intermediate wall (247), and each between two associated openings (239; 240) have a border (241, 242) for gripping a contact leg or a contact clip (225) from the side, preferably in the form of a support (241) for the back (229) of a U-shaped contact clip (225) and a counter-holder (242) arranged on the other side of the back (229).

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