EP2087500B1 - Installation switchgear comprising a double break - Google Patents

Abstract

The invention relates to an installation switchgear (1) with at least one pole current path (2), said switchgear comprising two fixed contact pieces (5, 6) and two mobile contact pieces (8, 9) arranged on a mobile contact bridge (7), forming a pole switch with two contacts and a double break. The contact bridge (7) is acted upon by a pusher (12) in the opening direction (O) and by a contact pressure spring (11) in the closing direction. The two contacts are closed in the connected state, and in the event of a short circuit, the contact bridge is pushed in the opening direction thereof and the pusher is moved into its trigger position in which it acts on the contact bridge in order to open same. Said switchgear is also provided with an electromagnetic tripping device (13), the armature of which releases the latching position of a switch latch (15) in the event of a short-circuit, such that the switch latch maintains the pusher (12) in the trigger position thereof by means of an actuating lever (17) which lags in relation to the pusher (12) and moves from the idle position into the disconnected position thereof. The contact bridge (7) is thereby permanently held open against the force of the contact pressure spring (11). The installation switchgear (1) comprises a control slide (30) mounted in such a way that it can be displaced between a release position and a locking position and, in its locking position, maintains the pusher in the trigger position thereof. The movement of the actuating lever from its idle position into its disconnected position causes the control slide to move from its locking position into its release position such that the pusher (12) is released from the trigger position thereof.

Description

The invention relates to an installation switching device with a double interruption according to the preamble of claim 1.

Generic installation switching devices, such as motor protection switch, have at least one Polstrompfad, comprising two fixed contacts and two arranged on a movable contact bridge, movable contact pieces through which a pole switch with two contacts and double interruption is formed. The contact bridge can be acted upon by a pusher in the opening direction and by a contact pressure spring in the closing direction. When switched on, the two contacts are closed. In the event of a short circuit, the contact bridge is pushed into its opening direction and the pusher is moved into its release position, in which this acts on the contact bridge opening. Furthermore, generic installation switching devices include an electromagnetic release whose armature unlocks the Verklinkungsstelle a switching mechanism when a short-circuit current in the Polstrompfad so that this trailing the trigger from its rest position to its off position and thereby moving from its rest position to its off position effective lever the pusher holds in its release position and thus the contact bridge is permanently open against the contact pressure spring acting

The document EP-A-0079819 discloses an installation switching device according to the preamble of claim 1.

Immediately after the strike of the contact bridge and thus the interruption of the short-circuit current in the Polstrompfad breaks the electrodynamic recoil of the electromagnetic release together and the contact bridge is acted upon by the force of the contact pressure spring in the closing direction to its closed position.

Due to the greater inertia of the mechanical system formed by the latch and the active lever, compared to the lower inertia of the armature and the pusher comprehensive mechanical system, the active lever hurries for permanent keeping open of the contacts through the switch lock the pusher movement after. Because after unlatching the switching mechanism, it takes a certain time until the active lever is acted upon by the switching mechanism in the opening direction, and then again passes a certain amount of time until the active lever has traveled the designated as tripping distance between its rest position and its point of attack on the pusher , For design reasons, a certain trip path of the action lever is unavoidable, since the pusher and the active lever at rest require a certain amount of play.

Under unfavorable conditions, it may happen that the contacts have already been closed again by the contact pressure spring before the switch lock can cause a permanent opening via the active lever and the pusher. One then speaks of the occurrence of a contact bounce, which is undesirable.

It is therefore an object of the present invention to provide a generic service switching device with improved dynamic behavior in the short-circuit current interruption while avoiding contact bounce.

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

According to the invention the installation switching device comprises a displaceably mounted between a release position and a locking position spool, which holds the trigger in its release position in its locking position, wherein the movement of the action lever from its rest position in its off position causes a displacement of the spool from its locking position to its release position so that then the movement of the pusher is released from its release position.

It is thus effectively prevented premature contact closure by the spool of the invention. The service switching device requires only an additional component or an additional module, namely the spool, so that an easy to install and cost-effective solution is achieved.

According to an advantageous embodiment of the active lever is mounted in a fixed axis of rotation, acting as a reversing lever toggle lever with a first and a second lever arm.

According to a further advantageous embodiment, in the switch-off position of the active lever, the second lever arm of the action lever is coupled to the pusher so that it can hold it in its release position.

According to a further advantageous embodiment, the control slide is held by the pusher in its release position in the on state, and in the case of short circuit, the displacement of the spool is released into its locking position as a result of the movement of the pusher in its release position.

According to a further advantageous embodiment, the spool can be designed as a diaphragm with an opening, wherein in the locked position, the aperture blocks the movement of the pusher from its release position out, and in the release position, the opening releases the displacement of the pusher from the triggering position out. In this case, in a further very advantageous embodiment, the spool or the diaphragm can be coupled to the active lever via a spring, so that the displacement of the control panel between the release and the locking position is controlled by the spring coupling with the active lever. In a further advantageous embodiment of the invention, the control lever is hinged to the control lever in the rest position of the active lever in the direction of its locking position acting spring. In a very advantageous embodiment of the invention, the spring may be a bent leaf spring.

The control of the displacement of the spool between its release position and its locking position thus happens according to the invention by the interaction between the mechanical coupling of the spool with the active lever and the inhibition of movement of the spool by the pusher.

If the spool of the invention is designed as a shutter and is in the release position, the shutter is penetrated by the pusher in its opening, whereby a sliding movement of the shutter is blocked by the pusher. At the same time the shutter is in its release position when the active lever is in his Resting position is applied by mechanical coupling towards their locking position with a force.

As soon as the pusher is beaten into its release position by an electromagnetic release by the armature of the electromagnetic release or by an electrodynamic repulsion between the fixed and the movable contact pieces, it leaves the area of action of the aperture of the aperture and releases it. Under the influence of the mechanical coupling with the active lever, the diaphragm can now move into its locking position.

Now, if the armature force has collapsed after the interruption of the short-circuit current and the contact bridge and the pusher are pressed by the restoring force of the contact pressure spring back into the on position, then this closing movement of the pusher is inhibited by the aperture now located in its locked position.

Only when the active lever has been moved by the switching mechanism in such a switch-off, in which he can now inhibit the closing movement of the pusher permanently, the aperture is returned to its release position due to the mechanical coupling between the diaphragm and the active lever.

And after the switch lock was latched and reset by intervention of an operator, and thereby the action lever was reset to its rest position, the pusher is released and can now go through the opening in the aperture back to its on position.

According to an advantageous embodiment of the invention, the spring, which produces the coupling between the active lever and the control panel, a bent leaf spring.

The active lever can be in a very advantageous embodiment of the invention in a fixed rotational axis mounted toggle lever with a first and a second lever arm, which acts as a lever. The first lever arm is acted upon by the switching mechanism, the second lever arm can hold the pusher on a shoulder in its trigger position. The direction in which the impulse from the switch lock acts, forms an angle with the direction of movement of the pusher. The reversing lever thus deflects the direction of action of the switching mechanism in the direction of movement of the pusher.

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

Figur 1:

ein Funktionsschema eines erfindungsgemäßen Installationsschaltgerätes gemäß einer ersten Ausführungsform mit einer Blende in deren Freigabe- stellung,

Figur 2:

ein Funktionsschema des Installationsschaltgerätes nach Fig. 1 kurz nach Auftreten eines Kurzschlussstroms,

Figur 3:

ein Funktionsschema des Installationsschaltgerätes nach Fig. 1 bei Hem- mung der Rückstell-Bewegung des Drückers, durch die Blende in ihrer Verriegelungsstellung,

Figur 4:

ein Funktionsschema des Installationsschaltgerätes nach Fig. 1 bei dauer- hafter Öffnung durch das Schaltschloss über den Wirkhebel,

Figur 5:

eine schematische Darstellung einer zweiten Ausführungsform mit einem Steuerschieber, der an der Unterseite des zweiten Hebelarms des Wirk- hebels geführt ist, in dessen Freigabestellung,

Figur 6:

eine Darstellung der Ausführungsform nach Figur 5, bei Hemmung der Rückstell-Bewegung des Drückers, durch den Steuerschieber in seiner Verriegelungsstellung,

Figur 7:

eine Darstellung der Ausführungsform nach Figur 5, bei dauerhafter Öff- nung durch das Schaltschloss über den Wirkhebel,

Figur 8:

eine schematische Darstellung einer dritten Ausführungsform mit einem Steuerschieber, der an der Unterseite des zweiten Hebelarms des Wirk- hebels geführt ist, in dessen Freigabestellung,

Figur 9:

eine Darstellung der Ausführungsform nach Figur 8, bei Hemmung der Rückstell-Bewegung des Drückers, durch den Steuerschieber in seiner Verriegelungsstellung,

Figur 10:

eine Darstellung der Ausführungsform nach Figur 8, bei dauerhafter Öff- nung durch das Schaltschloss über den Wirkhebel,

Figur 11:

eine schematische Darstellung einer vierten Ausführungsform mit einer Steuerbaugruppe, welchen einen Steuerschieber umfasst, in dessen Frei- gabestellung,

Figur 12:

eine Darstellung der Ausführungsform nach Figur 11, bei Hemmung der Rückstell-Bewegung des Drückers, durch den Steuerschieber in seiner Verriegelungsstellung,

Figur 13:

eine Darstellung der Ausführungsform nach Figur 11, bei dauerhafter Öff- nung durch das Schaltschloss über den Wirkhebel, sowie

Figur 14:

eine schematische Darstellung der Steuerbaugruppe der Ausführungsform nach Fig. 11.

Show it:

FIG. 1:

3 is a functional diagram of an installation switching device according to the invention according to a first embodiment with a diaphragm in its release position,

FIG. 2:

a functional diagram of the installation switching device according to Fig. 1 shortly after the occurrence of a short-circuit current,

FIG. 3:

a functional diagram of the installation switching device according to Fig. 1 inhibiting the return movement of the pusher, through the baffle in its locking position,

FIG. 4:

a functional diagram of the installation switching device according to Fig. 1 with permanent opening through the switch lock via the active lever,

FIG. 5:

2 a schematic representation of a second embodiment with a control slide which is guided on the lower side of the second lever arm of the active lever, in its release position,

FIG. 6:

an illustration of the embodiment according to FIG. 5 in inhibiting the return movement of the pusher, by the spool in its locking position,

FIG. 7:

an illustration of the embodiment according to FIG. 5 , with permanent opening through the switch lock via the active lever,

FIG. 8:

3 is a schematic representation of a third embodiment with a control slide which is guided on the underside of the second lever arm of the active lever, in its release position,

FIG. 9:

an illustration of the embodiment according to FIG. 8 in inhibiting the return movement of the pusher, by the spool in its locking position,

FIG. 10:

an illustration of the embodiment according to FIG. 8 , with permanent opening through the switch lock via the active lever,

FIG. 11:

4 is a schematic representation of a fourth embodiment with a control module, which comprises a control slide, in its release position,

FIG. 12:

an illustration of the embodiment according to FIG. 11 in inhibiting the return movement of the pusher, by the spool in its locking position,

FIG. 13:

an illustration of the embodiment according to FIG. 11 , with permanent opening through the switch lock via the active lever, as well as

FIG. 14:

a schematic representation of the control module of the embodiment according to Fig. 11 ,

In the figures, the same or equivalent elements or assemblies are each denoted by the same reference numerals.

First, the embodiment according to the FIGS. 1 to 4 considered.

The FIG. 1 shows an inventive switching device 1 with a Polstrompfad 2 between an input terminal 3 and an output terminal 4. It could for example be a Polstrompfad a three-pole motor protection switch, the other two Polstrompfade are constructed accordingly.

The Polstrompfad 2 comprises two fixed contact pieces 5.6 and two arranged on a movable contact bridge 7 movable contacts 8.9, through which a contact point 10 is formed with double interruption. The contact bridge 7 is acted upon by a contact pressure spring 11 in the closing direction, see directional arrow S. By a pusher 12 which engages the contact pressure spring 11 opposite side of the contact bridge 7 and on its opposite the contact pressure spring 11 narrow side carries an extension which forms a striker 20, this can be acted upon in the opening direction, see directional arrow O.

The Polstrompfad 2 still includes a thermal release 113 and an electromagnetic release 13 with an armature that hits the contact bridge 7 in the opening direction in the event of a short circuit current occurring in the Polstrompfad 2 due to an electrodynamic recoil over the pusher 12, indicated by the action line 14. At the same time acts the armature of the electromagnetic release 13 in the event of a short circuit on a switching mechanism 15 and unlatched Verklinkungsstelle, indicated by the action line 16, so that the switching mechanism 15 in the unlatched state via an active lever 17, indicated by the action line 18, the pusher 12 permanently in the opening direction the contact bridge 7 acted upon.

The function of the thermal release 113, which also acts on the switching mechanism 15 in the case of an overcurrent, indicated by the action line 114, is known in principle.

In the mechanical system comprising the switching mechanism 15 and the active lever 17 may be, for example, a toggle lever system with a two-stage latch.

The active lever 17 is designed as a double arm, the first, acted upon by the switching mechanism 15 lever arm 171 and its second, cooperating with the pusher 12 lever arm 172 form an obtuse angle with each other and are rotatably mounted in a stationary axis of rotation 173, whereby the active lever 17 as a lever acts.

The mechanical system just described has a certain mechanical inertia, which would take a certain amount of time, for example, 2 ms, before the active lever 17 with the free end of his second arm 172 hits the pusher 12 after the unlatching of the switching mechanism to this permanently in Opening direction apply. In contrast, the time to direct strike of the contact bridge 7 by the armature of the electromagnetic release 13 is much shorter, it is for example only 1 ms. This could, if no further measures are taken, happen that the contact bridge 7 already pressed back by the restoring force of the contact pressure spring 11 back to its original position in the closed position and the contact point 10 is closed again before the effective lever 17 with the free End of his second arm 172 the pusher and thus the contact bridge 7 can act permanently in the open position.

The measures according to the invention, which are taken to prevent this, are described below.

The pusher 12 is a total of an elongate member having approximately a cylindrical basic shape. He could also have a roughly cuboid basic shape. It comprises a main body and a striking pin 20 firmly molded thereto.

In a slot-like opening 21 in the pusher 12, which can be closed down to the narrow side of the pusher 12 through a web 25, the contact bridge 7 is guided.

In the opening 21 of the pusher 12, an upper stop 23 is formed for the contact bridge 7.

At the starting point of the striker pin 20, the pusher 12 has a shoulder 24 forming a lower stop for the free end 174 of the second lever arm 172 of the action lever 17.

The slide can be made in one piece with the striker 20 or the aforementioned slot as an injection molded part. But it could also consist of two parts, in the simplest case of a lower part and a screwed into this lower part cap screw, which then acts as a striking pin with guide paragraph.

In the vicinity of the shoulder 24, a control slide in the form of a diaphragm 30 is mounted, which has an opening 32 which, in the closed position of the pusher 12, see FIG. 1 , the striker 20 of the pusher 12 includes. The diaphragm 30 is mounted longitudinally displaceable in approximately perpendicular to the longitudinal direction of the pusher 12. In the in the FIG. 1 shown closed position of the pusher 12 is, however, a possible sliding movement of the panel 30 blocked by the striker 20 of the pusher.

About a bent approximately U-shaped leaf spring 34 which is hinged at one end to a narrow side of the panel 30, and at the other end to the second lever arm 172 of the action lever 17 in the vicinity of its axis of rotation 173, the diaphragm 30 is mechanical coupled with the active lever 17.

In this case, the leaf spring 34 is mounted between the second lever arm 172 of the active lever 17 and the diaphragm 30, that they in the rest position of the active lever 17, as shown in the FIG. 1 is shown, the diaphragm 30 acted upon in the direction of the active lever 17, indicated by the directional arrow P.

The effect of this arrangement according to the invention is the following. If short circuit occurs in the pole rung 21, see FIG. 2 Thus, the armature of the electromagnetic release 13 strikes the striker 20, indicated by the force arrow I in conjunction with the action line 14. By this impulse the pusher 12 is struck in its opening direction O, where he takes over the stop 23, the contact bridge 7, thereby separating the fixed contact pieces 5, 6 from the movable contact pieces 8, 9 and opening the contact point 10 as a whole. The contact bridge 7 presses in its downward movement, the contact pressure spring 11 together.

As a result of the displacement of the pusher 12 in the opening direction, the striking pin 20 finally comes out of the area of action of the opening 32 in the control slide 30. Now the blocking of the spool 30 is released, and he can follow the force of the spring 34 acting on him and in the in the FIG. 3 move shown locking position.

After opening the contact point 10 of the electrodynamic recoil breaks in the electromagnetic release 13 and the force on the pusher 12 disappears. Due to the inertia of the pusher 12, this initially continues its movement in the opening direction O. After the contact bridge 7 has reached its maximum deflection in the opening direction, it is pressed by the restoring force of the contact pressure spring 11 again in the closing direction S. However, the closing movement of the pusher 12 is now blocked by the spool 30, and the contact point 10th stays open. During this entire time, the active lever 17 remains in its rest position due to the mechanical inertia of the pawl mechanism of the switching mechanism 15 and the active lever 17 comprehensive mechanical system.

After expiration of the delay time caused by inertia, the switching mechanism after releasing its latching mechanism via a known mechanical device exerts a force K on the first lever arm 171 of the action lever 17, see FIG. 4 , whereby it is rotated clockwise relative to its starting position.

The second lever arm 172 of the action lever 17 strikes with its free end on the shot 1-ter 24 of the pusher 12. Now takes over the active lever 17, the permanent holding down the pusher 12 in its trigger position.

At the same time, the pivoting of the action lever 17 causes the leaf spring 34 to push the aperture 30 back into its release position. The striking pin 20 is now below the opening 32. If the switch lock 15 is reset by an operator by hand back to the closed position, the force K would be lifted to the first lever arm 171 of the active lever 17 and the pusher 12 by the restoring force of the contact pressure spring 11 again in its closed position according to the FIG. 1 pressed back. He would also pivot the active lever 17 via the shoulder 24 again counterclockwise in the Ruhr position.

All implementation possibilities which are familiar to the person skilled in the art after disclosure of the inventive function described here are, of course, to be covered by the invention. In particular, the mechanical coupling between the diaphragm 30 and the active lever 17 could also be realized so that in the rest position of the active lever 17, the diaphragm 30 is acted upon in a direction away from the active lever 17 direction. Furthermore, the timing in the interaction between the aperture 30, the pusher 12 and the active lever 17 could also be designed so that the striking pin 20 penetrates a small distance into the opening 32 before the active lever 17 has been pivoted clockwise so far that its second Lever arm holds the pusher 12 permanently in its trigger position.

At high short-circuit currents it can also lead to an electrodynamic repulsion of the movable of the fixed contact pieces. As a result, the contact bridge 7 is then pushed down in the opening direction, without the electromagnetic Trigger on the action line 14 would have acted on the striker 20. The contact bridge 7 takes in its downward movement the pusher 12 with down. As a result, the striker 20 finally comes just as out of the range of the slot 32, as if it had been knocked out by the electromagnetic release. The inhibition of the counter-upward movement of the pusher 12 by the spool 30 is the same as described above. Although the electromagnetic release of the electrodynamic repulsion after, but he unlocks the line of action 16 in this operating state, the Verklinkungsstelle the switch lock 15th

It will now be the embodiment according to the FIGS. 5 to 7 considered. This embodiment is different from that of FIGS. 1 to 4 in that instead of a control panel on the underside of the second lever arm 172 of the active lever 17, a spring-biased slide 1030 is used as a control slide, which causes the locking of the pusher. To the bottom of the second lever arm 172 are grooves (not shown in the figures), in which the slider body 1030 can move. The slider body 1030 is also connected by means of a compression spring 42 with the active lever 17.

The compression spring 42 pushes the slider body 1030 toward the free end of the second lever arm 172 of the action lever 17 back. At its the compression spring 42 remote from the free end of the slider body 1030 carries a slide nose 1032, and both sides each one side, so in the illustration according to the FIGS. 5 to 7 out of the plane projecting pin 40th

This results in an assembly comprising the active lever 17, the compression spring 42 and the slider body 1030. This assembly can be pre-assembled and used as a subunit in the service switching device 101.

The pusher body 12 has at the contact pressure spring 11 opposite narrow side a first shoulder 24, here also referred to as the first paragraph 24, and about a second shoulder 48, here also referred to as the second paragraph 48, on. At the second paragraph 48, the striker 20 connects.

In the vicinity of the slide nose 1032 in the service switching device 101, a guide member 44 is mounted, which has a control surface 46 in the form of a slope, which, starting approximately from the slide nose 1032, extends obliquely in the direction of the contact point 10 and the axis of rotation 173. The guide member may be attached to an inserted into the service switching device and held therein adapter or as Anformung on the housing inner wall.

In the in the FIG. 5 shown closed position, the active lever 17 is in its rest position, and the slider body 1030 is located with the slide nose 1032 by the bias of the compression spring 42 to the pusher body 12 at. The contact point is located below the first paragraph 24. The movement of the pusher 12 from the closed position in its release position is not hindered by the slider body 1030. The slider body 1030 is located in Fig. 5 in his release position.

When mounting the module in the service switching device this is fixed by using a mounting fork in the desired position. The mounting fork pushes the slider body 1030 in its release position. After insertion of the assembly, the mounting fork is removed and the slider body abuts against the pusher body 12 due to the compressive force of the compression spring 42. After inserting the assembly, the mounting fork is then removed.

In the event of a short circuit, the contact bridge in the opening direction, in the representation of Fig. 5 to 7 down, moves and the pusher 12 is moved to its release position, also down. Through the second shoulder 48, a clearance is created between the slide nose 1032 and the striking pin 20, into which the pressure spring 42 presses the slider body 1030 with the slide nose 1032. The slide nose 1032 is thus above the second shoulder 48 on the striker 20 at. He is then in his locked position. The active lever 17 initially remains in its rest position due to the mechanical inertia already described above.

If the contact bridge is pressed back toward the closed position due to the restoring force of the contact pressure spring 11, then blocked the spool 1030 with the slide nose 1032 on the second paragraph 48, the return movement of the slider 12. About the upper stop 23 is then the contact bridge in held open position. This location is in the Fig. 6 shown.

In the embodiment described here, the opening travel of the contacts, ie the distance between the fixed and the movable contact piece with the contact point open, is determined by the position of the second shoulder 48 on the pusher 12. The closer the second shoulder 48 is set to the upper end face at the free end of the striker pin 20, the greater the opening path of the contact point.

In a further embodiment, which is not shown here figuratively, the second shoulder 48 coincides with the upper end face at the free end of the striker pin 20. In this case, the pusher could also no longer have a second shoulder 48. The blocking of the pusher 20 by the spool 1030 then takes place at the upper end face at the free end of the striker pin 20. The opening travel of the contacts is then maximally large.

After the mechanical delay time and unlatching of the Verklinkungsstelle in the switch lock the active lever 17 is rotated about the axis of rotation 173 in a clockwise direction relative to its starting position in its off position. The second lever arm 172 of the action lever meets with its free end on the first shoulder 24 of the pusher 12. Now, the active lever 17 takes over the permanent hold down of the pusher 12 in its trigger position and thus the holding open the contact point 10th

When pivoting the action lever 17 in a clockwise direction reach the pins 40 on the slider body 1030 in contact with the control surface 46 of the guide member 44, it creates a kind of a movable coupling between the spool 1030 and the control surface 46. By the inclination of the control slope 46 and the movable coupling causes the spool 1030 upon further pivoting of the action lever. 17 is pressed clockwise back into its release position and held there, against the force of the compression spring 42. This position is in the FIG. 7 shown.

During the subsequent resetting of the service switching device, the active lever 17 is again rotated counterclockwise back to its rest position. The plunger 12 follows the active lever while up, and the contact bridge is pressed by the contact pressure spring 11 back into its closed position. The spool 1030 is then back to the pusher 12 below the first shoulder 24, so that the position according to FIG. 5 is reached again.

It will be the FIGS. 8 to 10 considered. Also in the embodiment shown there, a spring-biased slide 1030 is inserted on the underside of the second lever arm 172 of the action lever 17, which causes the locking of the pusher. To the bottom of the second lever arm 172 are grooves (not shown in the figures), in which the slider body 1030 can move. The slider body 1030 is also connected by means of a compression spring 42 with the active lever 17. In this respect, the functional effect of this embodiment largely corresponds to that described under FIGS. 5 to 7 has been described.

The difference from the embodiment according to the FIGS. 5 to 7 is that the movable coupling between the spool 1030 and the control surface 46 of the guide member 44 via a guide ramp 50 on the underside of the spool 1030, see Fig. 9 and 10 , The spool 1030 carries no laterally projecting pins more. This 1030 place won laterally of the spool.

It will be the FIGS. 11 to 13 considered. In the embodiment shown there, the service switching device 101 comprises a separate control assembly 1040, which is inserted between the active lever 17 and the pusher 12 in the device. The control assembly 1040 includes a frame 54, which serves as a support member for a longitudinally displaceably mounted in the frame spool 1030. The direction of displacement of the spool 1030 runs approximately parallel to the contact bridge and approximately perpendicular to the pusher 12. The spool is connected to a compression spring 42 with the frame 54, so that the compression spring 42 pushes the slider body 1030 in the direction of the pusher 12 back. At its free end facing away from the compression spring 42, the slider body 1030 carries a slide nose 1032, which passes through the frame 54 in the direction of the pusher 12 through a lateral opening.

The spool 1030 carries on its side facing the active lever 17 side a guide ramp 50. This forms a sloping towards the slide nose 1032 inclined plane. The second lever arm 172 of the action lever 17 carries on its side facing the spool 1030 a bulge 52, which may also be referred to as a cam or control extension. The bulge 52 is mounted so that it can enter into a movable coupling with the guide ramp 50 of the spool 1030 upon pivoting of the action lever 17 in a clockwise direction.

The pusher body 12 has, on the narrow side opposite the contact pressure spring 11, a first shoulder 24 and above a second shoulder 48. At the second paragraph 48, the striker 20 connects.

In the in the FIG. 11 shown closed position, the active lever 17 is in its rest position, wherein it is slightly inclined in this position relative to the direction of displacement of the spool 1030 upwards. The slider body 1030 abuts the pusher body 12 with the slider nose 1032 by the bias of the compression spring 42. The contact point is located below the first paragraph 24. The movement of the pusher 12 from the closed position in its release position is not hindered by the slider body 1030. The slider body 1030 is located in Fig. 11 in his release position.

In the event of a short circuit, the contact bridge in the opening direction, in the representation of Fig. 11 to 13 down, moves and the pusher 12 is moved to its release position, also down. The movement of the contact bridge can be done either due to electrodynamic repulsion of the fixed and movable contact points or due to the action of the impact armature of the electromagnetic release on the striker 12. Through the second shoulder 48, a clearance is created between the slide nose 1032 and the striking pin 20, into which the pressure spring 42 presses the slider body 1030 with the slide nose 1032. The slide nose 1032 is thus above the second shoulder 48 on the striker 20 at. He is then in his locked position. The active lever 17 initially remains in its rest position due to the mechanical inertia already described above.

If the contact bridge is pressed back toward the closed position due to the restoring force of the contact pressure spring 11, then blocked the spool 1030 with the slide nose 1032 on the second paragraph 48, the return movement of the slider 12. About the upper stop 23 is then the contact bridge in held open position. This location is in the Fig. 12 shown.

After the mechanical delay time and unlatching of the Verklinkungsstelle in the switch lock the active lever 17 is rotated about the axis of rotation 173 in a clockwise direction relative to its starting position in its off position. The second lever arm 172 of the Wirkhebets meets with its free end on the first shoulder 24 of the Pusher 12. Now takes over the active lever 17, the permanent hold down the pusher 12 in its trigger position and thus the holding open the contact point 10th

Upon pivoting of the action lever 17 in a clockwise direction, the bulge 52 on the second lever arm 172 of the action lever 17 comes into contact with the guide ramp 50 of the spool 1030, it creates a sort of movable coupling between the spool 1030 and the bulge or the control extension 52. By inclination the guide ramp 50 and the movable coupling causes the spool 1030 is pressed upon further pivoting of the action lever 17 in a clockwise direction back to its release position and held there, against the force of the compression spring 42. This position is in the FIG. 13 shown.

During the subsequent resetting of the service switching device, the active lever 17 is again rotated counterclockwise back to its rest position. The plunger 12 follows the active lever while up, and the contact bridge is pressed by the contact pressure spring 11 back into its closed position. The spool 1030 is then back to the pusher 12 below the first shoulder 24, so that the position according to FIG. 11 is reached again.

The in the FIGS. 11 to 13 embodiment shown with the tilted in the rest position relative to the direction of displacement of the spool 1030 active lever 17 is not the only possible. All this functionally identical embodiments, in which the second lever arm of the action lever can also run parallel to the contact bridge or at another angle, should be included in the invention in the context of equivalence. Details of the concrete design of the active lever is not discussed in the context of the present invention. All concrete design variations that cause a movable coupling according to the invention between the active lever and the spool should therefore be included within the scope of equivalence in the invention.

The FIG. 14 shows a possible embodiment of a control assembly 1040. It recognizes the approximately rectangular frame 54, in which three mutually parallel recesses 1042, 1043, 1044 are introduced. Each of the recesses 1042, 1043, 1044 is used for slidably receiving a control slide, wherein in Fig. 14 only in the recess 1042, a spool 1030 and in the recess 1044, a spool 1031 are shown.

The three control slides are correspondingly assigned to a Polstrompfad in the service switching device. It should be noted at this point that all that has been described in the description of the present invention with reference to a contact point in a Polstrompfad, of course, also applies to installation equipment and has validity in which a plurality Polstrompfade are arranged parallel to each other. The described arrangements and functional relationships of contact bridge, pusher, active lever. Control slide, etc. are then several times according to the number of Polstrompfaden. The active lever 17 can be configured as a single active lever which carries a common first lever arm 171 and a number of second lever arms 172 corresponding to the number of Polstrompfaden.

The spool 1030 is slidably held in side guide grooves 1046 in the recess 1042. The compression spring is not shown, it is to be inserted into the free space between the rear wall 1048 and the spool 1030 in the recess 1042.

At an end opening 1050 of the spool 1030 passes through with its slide nose 1032 the frame 54. The slide nose 1032 carries a semicircular recess 1033 so that it has approximately a bifurcated shape. The semicircular recess 1033 is adapted to the diameter of the striker pin 20 of the pusher 12, so that in the locking position according to FIG FIG. 12 can be kept better.

LIST OF REFERENCE NUMBERS

1, 101

Service switching device

2

pole current path

3

input terminal

4

output terminal

5, 6

Fixed contact pieces

7

Mobile contact bridge

8.9

Movable contact pieces

10

contact point

11

Contact pressure spring

12

handle

13

Electromagnetic release

14

line of action

15

switch lock

16

line of action

17

active lever

18

line of action

20

striker

21

opening

23

Upper stop

25

web

24

First shoulder

30, 1030

spool

32

opening

34

leaf spring

40

spigot

42

compression spring

44

Guide part, intermediate piece

46

Control surface, slope

48

Second shoulder

50

guide ramp

52

Bulge, cam

54

frame

113

Thermal release

114

line of action

171

First lever arm

172

Second lever arm

173

axis of rotation

1032

spool land

1040

control module

1042, 1043, 1044

recess

1033

recess

1046

guide

1048

rear wall

1050

Frontal opening

O

opening direction

S

closing direction

I

power Blast

K

force

Claims (13)

1. Installation switching device (1) having at least one pole current path (2), comprising two stationary contact pieces (5, 6) and two moving contact pieces (8, 9) which are arranged on a moving contact link (7) and form a pole switch with two contacts and a double interruption, wherein a pusher (12) can act on the contact link (7) in the opening direction (O) and a contact compression spring (11) can act on it in the closing direction (S), wherein, in the connected state, the two contacts are closed and wherein, in the event of a short circuit, the contact link is knocked in its opening direction and the pusher is moved to its trip position in which it acts in the sense of opening on the contact link, having an electromagnetic release (13), whose armature unlatches the catch point of a latching mechanism (15) in the event of a short circuit, such that this holds the pusher (12) in its trip position via an operating lever (17) which lags behind the pusher (12) and is in the process moved from its rest position to its disconnected position, thus acting permanently in the opening sense against the force of the contact compression spring (11) on the contact link (7), characterized in that the installation switching device (1) has a control slide (30, 1030), which is mounted such that it can move between a release position and a locking position and, in its locking position, holds the pusher (12) in its trip position, wherein the movement of the operating lever (17) from its rest position to its disconnected position results in the control slide (30, 1030) being moved from its locking position to its release position, thus allowing the pusher (12) to move from its trip position.
2. Installation switching device (1) according to Claim 1, wherein the operating lever (17) is a toggle lever which is mounted on a fixed-position rotating shaft (173), acts as a direction-changing lever and has a first and a second lever arm (171, 172).
3. Installation switching device (1) according to Claim 2, wherein, when the operating lever (17) is in the disconnected position, its second lever arm (172) is coupled to the pusher (12) such that it can hold the latter in its trip position.
4. Installation switching device according to Claim 3, wherein, in the connected state, the control slide (30, 1030) is held in its release position by the pusher and, in the event of a short circuit, the control slide (30, 1030) can move to its locking position as a consequence of the movement of the pusher (12) to its trip position.
5. Installation switching device (1) according to Claim 4, characterized in that the control slide (30) is in the form of a panel with an opening (32), wherein, in the locking position, the panel blocks the movement of the pusher from its trip position and, in the release position, the opening (32) allows the linear movement of the pusher (12) from its trip position.
6. Installation switching device (1) according to Claim 5, characterized in that the control slide (30) is coupled to the operating lever (17) via a spring, such that the movement of the control panel (30) between the release position and the locking position is controlled by the spring coupling to the operating lever (17).
7. Installation switching device (1) according to Claim 6, characterized in that a spring (34) which acts on the control panel (30), when the operating lever (17) is in the rest position, in the direction of its locking position is articulated on the operating lever (17).
8. Installation switching device (1) according to Claim 7, wherein the spring (34) is a curved leaf spring.
9. Installation switching device (1) according to Claim 4, characterized in that the control slide (1030) is guided on the second lever arm (172) such that it can move longitudinally.
10. Installation switching device (1) according to Claim 9, wherein the control slide (1030) is connected by means of a compression spring (42) to the second lever arm (172), and wherein the resetting force of the compression spring (42) acts on the control slide (1030) towards its locking position.
11. Installation switching device (1) according to Claim 10, which has a guide part (44) with a control surface (46), wherein the guide part (44) is arranged with respect to the operating lever (17) such that, when the operating lever (17) pivots from its rest position to its disconnected position, this results in moving coupling between the control slide (1030) and the control surface (46), which pushes the control slide (1030) back to its release position.
12. Installation switching device (1) according to Claim 4, characterized in that the control slide (1030) is guided in a separate control assembly (1040) such that it can move longitudinally, and is connected by means of a compression spring (42) to the control assembly (1040), and wherein the resetting force of the compression spring (42) acts on the control slide (1030) towards its locking position.
13. Installation switching device (1) according to Claim 12, wherein the second lever arm (172) of the operating lever (17) has a control projection (52), and the control slide (1030) has a control surface (50), wherein, when the operating lever (17) is pivoting from its rest position to its disconnected position, this results in moving coupling between the control projection (52) and the control surface (50), which pushes the control slide (1030) back to its release position.

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