EP2543054B1 - Drive assembly for a circuit breaker - Google Patents

Description

The invention relates to a drive arrangement of a circuit breaker with a pivotable drive lever and with a blocking element with a hineinbewegbaren in a pivoting range of the drive lever first blocking region and with a first release area for the pivotable drive lever.

A drive arrangement is for example from the published patent application DE 10 2008 008 479 A1 known. In the known arrangement, it is provided that a plurality of blocking elements are arranged on a circuit breaker. A blocking element is assigned in each case to a switching pole of the circuit breaker. In the course of a desired miniaturization of the circuit breaker, the available space is increasingly reduced.

From the translation DE 689 11 882 T2 a European patent specification, a drive assembly is known which has a blocking element. The local drive assembly uses for locking a pivotable drive lever by means of a blocking element a complex mechanism using various pivotable lever arms and rotatable shafts. The entire structure has a plurality of abutting stop surfaces. Accordingly, there is a costly drive assembly, which additionally requires increased maintenance.

It is therefore an object of the invention to further develop the known drive arrangement such that a lock is realized by a cost-effective and robust construction.

According to the invention the object is achieved in a drive arrangement of the type mentioned above in that the blocking element has a second release area and a second blocking area for a pivotable pivot lever of another switching device and the drive lever is pivotable about a first pivot axis and the pivot lever is pivotable about a second pivot axis and the two pivot axes are aligned substantially parallel, wherein the blocking element is displaceable substantially parallel to the pivot axes.

Setting up a second blocking region and a second releasing region on the blocking element makes it possible to use the blocking element not only for the power switch but also for another switching device. This makes it possible to use the robust construction not only for influencing a movement of the drive lever of the circuit breaker, but also for controlling the mobility of a pivotable pivot lever of another switching device. Thus, additional functions can be taken over in a small space by the blocking element. Due to the arrangement of the two release areas and the two blocking areas on one and the same blocking element, it is possible in a simple manner to couple the function of the drive lever of the circuit breaker and the function of the pivot lever of the other switching device with each other and thus optionally a mutual locking of the circuit breaker and the other Make switching device. Thus, it is for example possible that due to the arrangement of the release areas and the blocking areas on the blocking element actuation of only one of the two switching devices is possible. For example, it may be provided that a switching operation of the further switching device is blocked is when the circuit breaker is currently not blocked by the blocking element. Of course, a reverse effect may be desirable.

A release area should advantageously be delimited by at least one shoulder, which lies substantially transversely to the direction of movement of the blocking element. It can also be provided to arrange shoulders with respect to the direction of movement of the release area on both sides of a release area. Over the shoulder (s) any movement of the blocking element is prevented in a dipping of the pivot lever or the drive lever in the respective release area. By projecting into the respective release areas of the blocking element drive lever or pivot lever acting as stops shoulders a movement of the blocking element can be prevented at least in one direction by the drive lever or the pivot lever. Thus, a pivotal movement of the drive lever or the pivot lever can be prevented and the mobility of the blocking element can be limited on the release areas with immersed drive / pivot lever on the blocking areas.

A further advantageous embodiment provides that the drive lever is pivotable about a first pivot axis and the pivot lever is pivotable about a second pivot axis and the two pivot axes are aligned substantially parallel, wherein the blocking element is displaceable substantially parallel to the pivot axes.

By arranging the pivot axes of the drive lever and the pivot lever approximately parallel to one another, it is possible to cooperate in a simple manner with the blocking element both with the drive lever and with the pivot lever to let. For this purpose, the blocking element can be mounted displaceably substantially parallel to the pivot axes. This makes it possible for the respective blocking regions, ie the first blocking region, which is assigned to the pivotable drive lever and the second blocking region, which is assigned to the pivot lever, also to be able to block the respective associated lever. The shape of the blocking element according to the provided for abutment against the respective blocking areas drive lever or pivot lever are designed with a counter-shape. By a robust design, it is possible that, for example, even in an attempt to actuate the circuit breaker or the further switching device driving forces can be absorbed by the blocking element without causing the blocking element deformations.

It is advantageous in a parallel orientation of the pivot axes, the position of the drive lever or the pivot lever and thus their pivot planes offset in the axial direction to provide each other. This makes it possible to space the blocking areas and the release areas at the blocking element from each other in a favorable manner and thus to schedule corresponding reserves. Thus, the overall arrangement of simple robust machine elements can be made, even with a low dimensional stability is still given a secure effect of the blocking element.

A further advantageous embodiment can provide that the first blocking region is arranged in a first stop surface and the second blocking region in a second stop surface, wherein the two stop surfaces are arranged at an angle, in particular at right angles to each other.

The design of the blocking regions in abutment surfaces makes it possible to provide large-area sections of the drive lever or of the pivotable pivot lever which strike against corresponding abutment surfaces of the blocking regions. The stop surfaces can be shaped differently. However, it is advantageous if the stop surfaces are configured as flat surfaces. In addition, however, curved or profiled stop surfaces can be used. By an angular arrangement of the abutment surfaces to each other, it is also possible that mutually different areas, namely, areas lying at an angle to each other, are used on the blocking element for blocking the drive lever or for blocking the pivot lever. This can be done an individual adaptation of the blocking areas of the blocking element. Due to the arrangement of the stop surfaces at different angles to each other lying sides of the blocking element The corresponding stop surfaces can not be influenced or changed by the other not associated drive lever or pivot lever. Conversely, the blocking regions can each act only on the associated drive lever or pivot lever, while the unassigned pivot lever or drive lever remains unaffected. The stop surfaces may also extend beyond the respective blocking region. In this case, a blocking region is arranged in a stop surface which extends beyond the extent of the actual blocking region. That is, the blocking region is located in the abutment surface and the abutment surface is larger than the blocking region. However, it can also be provided that the extent of a stop surface corresponds to the extent of a blocking region.

A further advantageous embodiment may provide that the two stop surfaces abut each other and limit a body edge of the blocking element.

An angular position of the abutment surfaces, in particular a rectangular position of the abutment surfaces, including a common body edge, allows easy manipulation of the blocking element during a manufacturing process. By appropriate casting, milling or similar method, the blocking element can be brought into shape. Due to the angular position of the abutment surfaces to each other and the limitation of a body edge between the abutment surfaces complex shapes of the blocking element are avoided. Thus, a simple construction for the blocking element can be used and it can be held on a robust basic shape of the blocking element. The stop surfaces may extend beyond the blocking areas, so that the blocking areas are only part of the stop surfaces.

A further advantageous embodiment can provide that the blocking element is a profiled bar.

A profiled bolt is essentially to be regarded as a cuboid, wherein the bolt is displaceable parallel to one of its body edges. Accordingly, the bolt is guided and movable via a suitable drive element. By a profiling of the bolt, it is possible to design the provided for influencing the mobility of drive lever or pivot lever stop surfaces and to provide a corresponding blocking movement of the drive lever or the pivot lever through the blocking areas, whereas in the release areas a corresponding immersion or pivoting of the drive lever or Pivoting lever is made possible on the blocking element. In a corresponding angular arrangement of the stop surfaces of the blocking regions of the bolt may have a corresponding profiling in different directions. Thus, in particular cross-section reduced portions of the bolt may be provided to form the release areas. For profiling corresponding cutouts, grooves, etc. may be introduced into a cuboid bar, with corresponding shoulders may be arranged in the transition region between different cross sections.

A further advantageous embodiment may provide that the blocking element is driven in the manner of a crank mechanism by a pivoting control lever.

The blocking element is moved in response to external conditions. For example, it may be provided that on the circuit breaker is to prevent a movement of the drive lever of the circuit breaker reliable. Accordingly, the blocking element with its first blocking region is to be moved into the pivoting region of the drive lever. It can be provided that a corresponding manual triggering of a movement of the blocking element is performed. However, it can also be provided that a control of the control lever takes place in dependence on the state of a further component. For example, the circuit breaker may be combined with a circuit breaker which initiates movement of the blocking element at a corresponding disconnected position of the circuit breaker so that the first blocking section is moved into the pivoting range of the drive lever. However, it can also be provided that a disconnected position of the circuit breaker is defined by the blocking element. The circuit breaker is in its off position and has an open breaker point. By blocking a switch-on movement of the pivotable drive lever by means of the first blocking region, it is now possible to exclude a movement of the drive lever of the circuit breaker, so that now a disconnecting function of the circuit breaker is ensured because even if an unintentional operation or a malfunction of the circuit breaker, a switching movement mechanically is prevented over the blocked drive lever.

If the blocking element is driven in the manner of a crank via a pivotable control lever, it is possible to convert a rotational movement, such as that produced by rotating drives, into a linear movement of the blocking element in a simple manner.

Furthermore, the pivot lever can also be used to redirect a linear movement, for example, 90 degrees. It can be provided that the pivotable control lever is directly engaged with the blocking element or that the crank mechanism converts a pivotal movement of the control lever in a linear movement of the blocking element with the interposition of a connecting rod.

Furthermore, it can be advantageously provided that the blocking element has a shoulder which divides the blocking element into a first and a second section, the first section having a larger cross section than the second section and the first blocking region in the first section and the second blocking region in the second Section are located.

The blocking element is preferably constructed in the manner of a cuboid, wherein this can have a corresponding profiling, ie, different cross-sections. For profiling, the cuboid may be provided with a corresponding shoulder which divides the blocking element into two sections. In this case, the two sections should extend relative to the axis of movement of the blocking element along this axis of movement. The shoulder preferably extends transversely to the axis of movement. The shoulder can be generated, for example, by reducing the cross-section of the blocking element, so that the blocking element in the first section is substantially cuboid, wherein the cross section of this cuboid is greater than the cross section of the substantially cuboid second section. The blocking element can have an L-shaped contour due to the cross-sectional reduction. An arrangement of the blocking regions in the first and in the second section allows various dimensions of the drive lever or the Pivot lever. This makes it possible to block relatively widely spaced pivot axes of drive lever or pivot lever via a blocking element located between these two axes. The shoulder forms a sudden cross-sectional reduction between the first and second portions of the blocking element. Through the shoulder of the first release area of the drive lever is limited. When the drive lever pivots into the first release region, the shoulder limits movement of the blocking element in one direction. Thus, a movement of the second release area is prevented in the pivot region of the associated pivot lever and the second blocking region is located reliably in the pivoting range of the pivot lever and suppresses a movement of the pivot lever. Thus, on the one hand via the first blocking region of the blocking element movement of the drive lever can be prevented, on the other hand, a movement of the blocking element can be prevented in a pivoting of the drive lever in the first release area. Further, on the one hand via the second blocking region of the blocking element movement of the pivot lever can be prevented, on the other hand, a movement of the blocking element can be prevented in a pivoting of the pivot lever in the second release region and consequently the first blocking region remains in the pivot plane of the drive lever and blocks a switch-on of the drive lever of the circuit breaker.

It can advantageously be provided that the second release area is located in the second section and has a reduced cross section relative to the cross section of the second section.

By additionally reducing the cross section of the second portion, the first and second release regions may be disposed within the second portion. The second release area can profile the blocking element in the manner of a groove, for example. The groove can be inserted substantially transversely to the direction of movement of the blocking element in the blocking element, in particular in the second section. In order for a pivoting of the pivot lever in the second release region of the blocking element prevents movement of the blocking element by the immersed pivot lever and located on both sides of the pivot lever in the direction of the axis of movement of the blocking element groove cheeks.

Thus, on the one hand, a movement of the pivot lever or of the drive lever can be limited by the blocking element, on the other hand, a movement of the blocking element can be limited by the pivot lever or the drive lever. For a mutual locking of the pivot lever and the drive lever is possible. That is, it is only one of the two levers freely movable, while the other is blocked.

A further advantageous embodiment can provide that the first release area is located in the second section.

An arrangement of the first release area and the second blocking area in one and the same second section on the one hand enables a locking of the second blocking area and the first clearance area relative to one another. Since these two areas are located on the same second section, their relative position to each other is permanently impressed on the blocking element. The first release area and the second blocking region may, for example, have the same cross sections.

A further advantageous embodiment can provide that the drive lever is supported by a shaft which protrudes through a fluid-tight Kapselungswandung an interrupter unit of the circuit breaker.

Circuit breakers usually have at least one, usually several interrupter units. An interrupter unit is the module which serves to establish or interrupt a current path. For example, the interrupter unit may have relatively movable contact pieces, which are in galvanic contact with each other in the on state and are electrically isolated from each other in the off state. In order to protect the contact pieces, it is advantageous to provide an interrupter unit with a fluid-tight encapsulation, which surrounds components disposed in the interior in a fluid-tight manner.

In order to transmit a movement into the encapsulation, it is advantageous to allow an encapsulation wall to pass fluid-tightly from a shaft and to allow the drive lever to rest directly on this shaft. On the one hand it is possible in a simple manner to seal the rotatable shaft relative to the encapsulation, on the other hand, an arrangement of the drive lever immediately adjacent to the interrupter unit is a guarantee that a movement of the shaft can be reliably prevented. A movement is transmitted to the shaft via the drive lever and introduced into the encapsulation via the shaft. Thus, even in the event of a fault in the drive train, a reliable blocking of a movement of the shaft and, consequently, of a movement in the interior the encapsulating housing located mechanism for driving the contact pieces by the blocking element possible.

A further advantageous embodiment may provide that the pivot lever is shaped in the manner of a sector of a circular cylinder.

An embodiment of a pivot lever of the type a sector of a circular cylinder allows to enable a blocking action of the pivot lever on the blocking element during a large pivoting range of the pivotable pivot lever. Thus, it can be provided, for example, that the pivot lever, for example, represents an at least 90 ° segment of a circular cylinder, so that upon pivotal movement of the pivot lever by 90 °, a corresponding locking action is ensured by the pivot lever over the entire swing angle. Thus, for example, it is possible to cause a corresponding blocking of a movement of the blocking element already with the onset of a movement of the pivoting lever and to maintain it during the entire further course of a movement of the pivoting lever.

Furthermore, it can be advantageously provided that a status display is arranged on the blocking element.

By means of the blocking element is possible in a simple manner, also to represent the state of the circuit breaker. Blocking a movement of the drive lever by means of the first blocking area can be displayed externally. Since a blocking effect is generated due to a displacement of the blocking element, the position of the blocking element itself is an indicator of the state of the circuit breaker. If the blocking element is blocked in the first blocking region, the power switch must be in an off position and only in this case it is possible to spend the first blocking region of the blocking element in the pivoting range of the drive lever. Accordingly, it is possible to indicate the state of the circuit breaker, for example by a color mark. By masking the color marking this can be visible or hidden depending on the position of the blocking element.

It can also be advantageously provided that the blocking element is moved with the status display through a wall.

If the blocking element with the status display moved through a wall, in addition to a color marking and signaling of the state, a corresponding spatial change after passing through the wall can be detected. A protruding of the blocking element from the wall then indicates a blockage of the circuit breaker. The blocking element can rest permanently in a recess of the wall. As the blocking element passes through the wall, a portion of the blocking element emerges. This protruding portion, which was previously covered by the wall, may have the status indicator. For this purpose, the protruding portion may be provided with a corresponding color and / or alphanumeric mark as a status indicator. The marking can also be done by an attached icon, such as a closed lock.

A further advantageous embodiment can provide that the further switching device is a grounding switch.

Circuit breakers are used to turn on or off an electrical current path. In the off state can be advantageously provided that individual sections of the current path are to apply earth potential. By means of a corresponding earthing switch grounding can be made. The further switching device may only be switched in the disconnected position of the circuit breaker. By blocking element, it is possible in a simple manner to avoid switching errors of the other switching device and to allow grounding on the other switching device only in the off state of the circuit breaker. The earthing switch can be constructed as an open-circuit grounding switch, ie in the atmospheric environment, an electrically conductive connection between a grounding point and a connection point of the circuit breaker is made. For example, the grounding switch can have a pivot axis around which a grounding rod is set in pivoting motion, wherein pivoting of the pivoting lever takes place together with the grounding rod.

Furthermore, it can be advantageously provided that the circuit breaker has a plurality of switching poles, each having at least one drive lever, which communicate with each other and only one of the drive lever of the switching poles is associated with a blocking element.

Using a plurality of switching poles makes it possible, for example, to switch multiphase electric power transmission systems with a circuit breaker. This requires the interruption of, for example, several, in particular three, electrical current paths belonging to a common polyphase electric power transmission network. It must be ensured that the individual current paths are interrupted or switched on, at least in a timely manner, in particular at the same time. The individual switching poles of a circuit breaker have a substantially similar structure.

At least each of the circuit breakers is associated with a separate drive lever, which couples a respective movement in the respective encapsulation of the interrupter unit of the respective switching pole via a rotatably mounted shaft. The individual drive levers can be coupled together, so that a synchronized movement of the drive lever takes place with each other. The coupling of the drive lever can be carried out so rigidly (for example via coupling rods) that are blocked in a blocking of the drive lever further movements of the other connected to this one blocked drive lever drive lever. Thus, it is possible to prevent unwanted movement of the switching contacts even at a circuit breaker with multiple switching poles by the use of a single blocking element at all switching poles. In the same way, moving parts of the further switching device of a plurality of switching poles can be coupled to one another, provided that the further switching device is also designed to be multi-pole.

Furthermore, it can be advantageously provided that the circuit breaker has a traverse with a substantially U-shaped cross section, wherein the blocking element is mounted within the bounded by the U-shaped cross section contour.

A Traverse can serve as a chassis for the circuit breaker, on which all essential components are supported. Thus, the individual modules can be positioned and fixed relative to each other. Through the use of a U-shaped cross section of the traverse, a sufficiently angularly rigid traverse is provided with a reduced amount of material. Now, if the blocking element is stored within the limited by the U-shaped cross-section contour, so is the blocking element with its storage within a mechanically protected space, so that influences acting on it from the environment are at least substantially kept away from it.

Furthermore, it can be advantageously provided that switching poles of the circuit breaker are placed on the crossbar.

Substituting the switching poles of a circuit breaker on the Traverse, it is easily possible to adjust the position and mobility of the blocking element relative to the position of the switching poles of the circuit breaker and align. Furthermore, the other switching device can be placed on the traverse. Thus, for example, it is possible to mount a parallel to the direction of movement of the blocking element aligned rotatable shaft of the other switching device to the crossbar, wherein at one end of the rotatable shaft, a grounding rod is disposed radially to the axis of rotation and the grounding rod together with the pivot lever about the axis of rotation of the shaft can be pivoted around.

In the following the invention will be shown schematically with reference to an embodiment in a drawing and described in more detail below.

Figur 1

eine perspektivische Ansicht eines Leistungsschalters mit einem weiteren Schaltgerät, die

Figur 2

einen Schnitt durch die Figur 1 in Richtung II-II, die

Figur 3

einen Schnitt durch die Figur 1 in Richtung III-III, die

Figur 4

eine perspektivische Ansicht mit dem Schnitt III-III, ein Antriebshebel des Leistungsschalters ist in einem ersten Freigabebereich eines Blockierelementes befindlich, ein Schwenkhebel des weiteren Schaltgerätes ist in einem zweiten Blockierbereich des Blockierelementes befindlich, die

Figur 5

eine gleichartige Ansicht wie Figur 4, wobei das Blockierelement frei bewegbar ist, die

Figur 6

eine gleichartige Ansicht wie Figur 4, wobei der schwenkbare Antriebshebel sich in einem ersten Blockierbereich befindet und der Schwenkhebel sich in einem zweiten Freigabebereich des Blockierelementes befindet und die

Figur 7

einen in den zweiten Freigabebereich des Blockierelementes eingeschwenkten Schwenkhebel.

It shows the

FIG. 1

a perspective view of a circuit breaker with another switching device, the

FIG. 2

a cut through the FIG. 1 in the direction of II-II, the

FIG. 3

a cut through the FIG. 1 in the direction of III-III, the

FIG. 4

a perspective view with the section III-III, a drive lever of the circuit breaker is located in a first release region of a blocking element, a pivot lever of the further switching device is located in a second blocking region of the blocking element, the

FIG. 5

a similar view as FIG. 4 , wherein the blocking element is freely movable, the

FIG. 6

a similar view as FIG. 4 , wherein the pivotable drive lever is located in a first blocking region and the pivot lever is located in a second release region of the blocking element and the

FIG. 7

a pivoted into the second release region of the blocking element pivoting lever.

Of the FIG. 1 is a perspective view of a circuit breaker removed. The power switch has a switching pole A, a switching pole B and a switching pole C. Each of the three switching poles A, B, C is used for interrupting or for producing a current path. In the present case, the three switching poles A, B, C are designed similarly and serve to switch a polyphase current path within a polyphase electrical energy transmission system. Since the three switching poles A, B, C are constructed identically, the structure of a switching pole of the circuit breaker will be described below with reference to the switching pole A by way of example.

The switching pole A has a base 1. The base 1 is, for example, a metal cast body, which is a positioning the entire switching pole A is used. In the present case, the base 1 is equipped with a collar 1a which radially widens the circumference of the base 1. The base 1 is connected to a traverse 2. For this purpose, the traverse 2 on its upper top surface 3 has a recess through which the base 1 protrudes, wherein the collar 1 a limits the insertion depth of the base 1 into the recess of the traverse 2. By means of the seated on the upper top surface 3 collar 1a of the base 1 on the cross member 2 can be fixed.

The base 1 extends through the upper top surface 3 of the traverse 2 and has at its below the upper top surface 3 lying end a transmission housing 4. The transmission housing 4 is in the FIG. 2 recognizable. The traverse 2 has a substantially U-shaped cross-section, wherein the upper cover surface 3 is arranged at the portion which connects the two side walls of the U together. The gear housing 4 is dimensioned such that this is located within the limited by the U-shaped cross-section contour of the traverse 2. As a result, this part of the base 1 is largely protected against mechanical influences.

On the base 1, an insulating body 5 is arranged. The insulating body 5 is configured in this case rotationally symmetrical and provided on its outside with creepage extending ribs. The insulating body 5 is designed as a hollow body, wherein the interior of the insulating body with electrically insulating gas, preferably sulfur hexafluoride, is filled. The insulating body 5 is fluid-tightly connected to the base 1, so that even a space located within the base 1 is filled with the electrically insulating gas. For example, also designed as a transmission housing 4 section of the base 1 with the electrically insulating gas filled. The base 1 and the insulating body 5 are fluid-tightly interconnected and form a fluid-tight enclosure. The encapsulation of the switching pole A is part of an interrupter unit. The interrupter unit has the components of the switching pole A, which are used directly for a production / interruption of a current path.

By the insulating body 5 are electrically isolated and sealed in a fluid-tight manner, a first connection point 6 and a second connection point 7 led to the outside. The two connection points 6, 7 are used to connect electrical leads to the switching pole A of the circuit breaker. As electrical lines, for example, overhead cables or the like can be used. About the two connection points 6, 7, a current path is formed in the interior of the insulating body 5. With the first and the second connection point 6, 7 two relatively movable contact pieces 8, 9 are connected. In the present case, the first contact piece 8 is fixedly arranged in the interior of the insulating body 5 and electrically conductively connected to the first connection point 6. The second contact piece 9 is movably mounted. The first contact piece 8 is provided at its end facing the second contact piece 9 with a bush-shaped area, in which the movable second contact piece 9, which is equipped bolt-shaped, is retractable. Thus, a switching point is formed between the two contact pieces 8, 9, which can be brought by a relative movement between the two contact pieces 8, 9 in a disconnected state and in an on state. The second contact piece 9 is electrically conductively contacted via a sliding contact arrangement with the second connection point 7, so that the two contact pieces 8, 9 can be connected via the two connection points 6, 7 into a current path.

To generate a movement of the second contact piece 9 is in the FIG. 1 Drive device not shown provided. The drive device is arranged outside of the insulating body 5 and outside the base 1 and, for example, supported by the traverse 2. In the FIG. 1 is shown by a double arrow 10, the possibility of coupling a initiated by the drive means movement on an end face of the cross member 2. About in the FIG. 1 With the broken solid lines shown way is a movement via the respective gear housing 4 in the interior of the switching poles A, B, C einkoppelbar. In addition, a coupling of a drive movement at other positions of the traverse 2 is possible. In particular, a drive movement can be coupled in at any switching pole A, B, C and distributed from there to the other switching poles A, B, C. A blocking element 14 should preferably be arranged at the switching pole A, B, C, at which a drive movement is coupled.

Furthermore, a further switching device is arranged on the traverse 2. The further switching device is presently designed as a so-called Freilufterdungsschalter. The number of switching poles A, B, C corresponding to the Freilufterdungsschalter is also designed three-pole, ie, each of the switching poles A, B, C can be grounded through the other switching device. The further switching device has a plurality of switching poles A1, B1, C1, which in turn are of identical construction. Therefore, the structure of a switching pole A1 of the further switching device will be described in more detail below by way of example. The switching pole A1 has a rotatable shaft 11. The rotatable shaft 11 is rotatably mounted on the upper deck surface 3 of the traverse 2, wherein the axis of rotation of the rotatable shaft 11 is skewed to the axis of movement of the second contact piece 9. In a projection in the direction of the longitudinal axis of the Traverse 2, ie, in the direction of the double arrow 10 or perpendicular to the cross section of the substantially U-shaped profile of the cross member 2, the axis of rotation of the rotatable shaft 11 intersects the axis of movement of the second contact piece 9 at right angles.

With the rotatable shaft 11, a grounding rod 12 is connected rigid angle. The grounding rod 12 extends substantially radially to the axis of rotation of the rotatable shaft 11. Furthermore, a pivotable pivot lever 13 is disposed on the rotatable shaft 11, which is also connected in a rigid angle with the rotatable shaft 11. During a movement of the rotatable shaft 11, the ground rod 12 and the pivotable pivot lever 13 are moved synchronously. The grounding rod 12 is acted upon at its the rotatable shaft 11 end facing ground potential. For this purpose, it can be provided that electrical contacting with ground potential takes place via a separate grounding line with the grounding rod 12. Such a grounding line may be, for example, a flexible copper strip.

At the remote from the rotatable shaft 11 free end of the grounding rod 12 is a contact area is located, which can come into electrical contact with either the first connection point 6 or the second connection point 7 depending on the length of the grounding rod 12. For this purpose, a corresponding mating contact, for example, a resilient contact slot or the like is arranged at the respectively provided connection point 6, 7. Upon retraction of the contact region of the grounding rod 12 in the mating contact at the first and second connection point 6, 7, a ground connection of ground potential via the grounding rod 12 to the first connection point 6 or the second connection point 7 is given. Accordingly, the connection lines located at the first and at the second connection point 6, 7 are subjected to ground potential.

A rotation of the rotatable shaft 11 can be initiated in various ways. For example, a drive element may engage the end of the rotatable shaft 11, at which no ground bar 12 is located. However, it can also be provided that the pivotable pivot lever 13 is used for coupling a movement on the rotatable shaft and consequently also on the ground rod 12. A movement of the waves of the switching poles A1, A1, A3 of the further switching device can be synchronized via a mechanical coupling. It is thus possible to drive only one of the shafts and to transmit a drive movement to the other shafts of the further switching poles B1, C1 via the coupling.

The circuit breaker with its switching poles A, B, C is used to turn on or off a current path within an electrical power transmission network. The connection lines provided for energy transmission are to be arranged and kept electrically isolated from a ground potential in the regular operating case. Unwanted application of the connection cables with ground potential, especially if they are below rated voltage and carry a rated current, can lead to irreparable damage. Therefore, it is desirable that an operation of the earthing switch takes place only when a certain switching position (preferably a disconnected position / off position) of the circuit breaker is present. Conversely, it is undesirable in a grounding of the connection points 6, 7 via the grounding rod 12 of the further switching device that the circuit breaker suddenly performs a switch-on and it comes to a ground fault.

In order to avoid such faulty circuits, it is provided on the circuit breaker that the drive arrangement is equipped with a blocking element 14. In the FIG. 1 a part of the blocking element 14 protrudes through a lateral wall Traverse 2 through. Operation and function of the blocking element 14 will be described with reference to the following figures.

In the FIG. 2 is a section through the cross member 2 in the direction II-II shown. Evident is the substantially U-shaped cross-section of the traverse 2, wherein on the upper deck surface 3, the rotatable shaft 11 of the further switching device is arranged. Recognizable turn is the pivotable pivot lever 13, which is connected to the shaft 11. In the FIG. 2 By way of example, a possibility of connecting a ground rod 12 to the rotatable shaft 11 is shown. Thus, it is provided here that one or more axially successive bracket 15 of the grounding rod 12 against a receiving element which is connected to the rotatable shaft 11, is pressed. About the screwable bracket 15 an easy replacement of the grounding rod 12 is given. Thus, in the case of wear of the grounding rod 12 or when the mating contacts change from the first connection point 6 to the second connection point 7 or vice versa, a shorter or a longer grounding rod 12 can be used. Furthermore, in the FIG. 2 formed as a transmission housing 4 section of the base 1 of the switching pole A recognizable. The gear housing 4 receives in its interior a part of a transmission, which serves to transmit a movement to the second contact piece 9. In the foregoing, a shaft 16 is passed in a fluid-tight manner through an encapsulation wall of the interrupter unit of the switching pole A. For this purpose, corresponding sealing rings are provided, so that even with a rotation of the shaft 16, a fluid-tight bond between Kapselungswandung and shaft 16 is given. At the protruding from the gear housing 4 end of the shaft 16, a drive lever 17 is attached. The drive lever 17 is rigidly connected to the shaft 16. The drive lever 17 has a fork-shaped receptacle 18, in which a drive rod 19 and a coupling rod 20 are used. About the drive rod 19 is a movement in the direction of the double arrow 10 after FIG. 1 transferable to the drive lever 17. By means of the coupling rod 20, a connection to a drive lever of an adjacent interrupter unit in the present case of Schaltpols B and in the same way from the Schaltpol B are also transferred to the switching pole C. Thus, the individual drive lever 17, which are assigned to the respective switching poles A, B, C, coupled to each other via corresponding coupling rods, so that an impressed on the drive lever 17 of the pole column A movement via coupling rods 20 on the other drive lever of the other polar columns B, C of the circuit breaker can be transmitted.

Thus, it is possible to use a common drive unit which generates a movement and this movement can be transmitted to all the polar columns A, B, C of the circuit breaker.

At the free ends of the side cheeks of the U-shaped cross member 20, a crossbar 21 is attached. The crossbar 21 is penetrated by recesses, in which stud bolts 22 are used. About the studs 22, a bearing block 23 is supported on the crossbar 21. On the bearing block 23, a blocking element 14 is slidably mounted. The studs 22 are adjustable by thread on the crossbar 21. Accordingly, the orientation of the bearing block 23 can be adjusted. Thus, a reliable blocking effect of the blocking element can be adjusted. In particular, positions of stop surfaces are adjustable. The displacement direction of the transverse element 14 is parallel to the axis of rotation of the rotatable shaft 11 and to the axis of rotation of the shaft 16 of the drive lever 17 arranged. Furthermore, a control lever 24 is arranged on the bearing block 23, via which a movement can be transmitted to the blocking element 14.

The FIG. 3 shows a section in the in the FIG. 1 shown direction III-III. The FIG. 3 allows a view into the interior of the transmission case 4 and can be seen a driven lever 25 which is seated on the shaft 16 in the interior of the transmission housing 4 and transmits a movement of the drive lever 17. About the output lever 25 is a motion transmission to the second contact piece. 9

In the FIG. 3 is in a plan view of the bearing block 23 can be seen, which has a recess to the blocking element 14 parallel to the axis of rotation of the shaft 16 and parallel to the axis of rotation of the rotatable shaft 11, which in the FIG. 3 not shown, to be able to move. It can be seen that the blocking element 14 is substantially cuboid-shaped, wherein the cuboid has different cross sections, ie, in the course of the blocking element 14, a shoulder 26 is arranged, which extends substantially transversely to the axis of movement of the blocking element 14. The shoulder 14 divides the blocking element 14 into a first section 14.1 and into a second section 14.2. Over the shoulder 26 is a sudden cross-sectional reduction of the first section 14.1 given to the second section 14.2. Both the first section 14.1 and the second section 14.2 have a substantially rectangular cross section with a cuboid structure, wherein the cross section of the first section 14.1 is larger than the cross section of the second section 14.2. Due to the structure of the first and second sections 14.1, 14.2, the blocking element 14 is provided with an L-shaped outline, wherein one of the L-shaped Flanks of the blocking element 14 serves as a support surface on the bearing block 23.

On the bearing block 23, the control lever 24 is rotatably mounted, wherein the control lever 24 is configured in the manner of a two-armed lever. A first lever arm of the two-armed lever is connected to a drive device for the blocking element 14. With the other lever arm of the control lever 24 is guided via a bolt in a gate of the blocking element 14, so that the control lever 24 and the blocking element 14 cooperate in the manner of a crank mechanism. A pivotal movement of the control lever 24 is converted into a linear movement of the blocking element 14. The scenery is designed in the manner of a transverse to the direction of movement of the blocking element 14 extending slot. About the coupling of control lever 24 and blocking element 14, the stroke of the blocking element 14 is limited, so that the blocking element 14 from the bearing block 23 can not slide out.

In the first section 14.1 of the blocking element 14, a first blocking region 27 is arranged. The first blocking region 27 is located in a stop surface which lies in an L-shaped flank of the blocking element 14, wherein the first blocking region 27 is arranged with its stop surface on the side opposite the bearing surface of the blocking element 14 in the bearing block 23. The drive lever 17 is equipped with a stop 17.1, which in the in the FIG. 3 present position projects beyond the first blocking region 27 and rests against it, so that free pivoting of the drive lever 17 is blocked by the first blocking region 27. Such a position of the drive lever 17 may for example be advantageous if the contacts 8, 9 are separated from each other.

The circuit breaker is in disconnected position or exhibition.

In the area of the second section 14.2, a first release area 28 is located. Due to the cross-sectional reduction, a penetration of the stop 17.1 of the drive lever 17 in front of the blocking element 14 is enabled in the region of the first release region 28, so that a closing movement of the circuit breaker takes place. For this purpose, the blocking element would first have to be moved in the direction of the arrow 29.

In the area of the second section 14.2, a second release area 30 is furthermore arranged. The second release portion 30 is formed by a groove formed in a stopper surface in the L-shaped structure of the blocking member 14. The groove is introduced into the flank, which is opposite to the L-shaped side of the L-shaped blocking element, which serves to slide the blocking element 14 in the bearing block 23. The groove is designed so wide that the width of the pivotable pivot lever 13 is only slightly smaller. After a movement of the rotatable shaft 11 and a pivoting of the pivot lever 30 into the second release area 19, movement of the blocking element 14 is prevented. During a rotational movement of the shaft 11, wherein the pivotable pivot lever 13 moves into the second release area 30, the circuit breaker is preferably in its disconnected position, wherein a switch-on due to the position of the first blocking region 27 in the pivoting area of the stop 17.1 of the drive lever 17 is prevented , This ensures that the switchgear can only be switched on when the circuit breaker is switched off. The pivot lever 13 is to ensure locking configured on its entire pivot path in the manner of a sector of a circular cylinder, wherein the lateral surface of the circular cylinder sector is opposite to the groove bottom and the flanks of the groove of the second release portion 30 opposite the respective top surfaces of the circular cylinder sector.

In the second section 14.2 of the blocking element 14, a second blocking region 31 is furthermore arranged, wherein the first blocking region 27, the first release region 28, the second release region 30 and the second blocking region 31 are arranged consecutively in the direction of the movement path of the blocking element 14. The first blocking region 27 is located in the first section 14.1 and the first release region 28, the second release region 30 and the second blocking region 31 are located successively in the second section 14.2 of the blocking element. The first release region 28 and the second blocking region 31 have a similar shape, in particular the same cross-section, the first release region 28 and the second blocking region 31 being separated from one another by the second release region 30.

In the in the FIG. 3 shown state is a pivoting of the pivotable pivot lever 13 in the second release portion 30 of the blocking element 14 allows, that is, in this state, the circuit breaker is in disconnected position and the earthing switch is still in exhibition, with a pivoting of the rotatable shaft 11 and the thereto fixed grounding rod 12 and the pivotable pivot lever 13 of the other switching device this can be spent in its setting. The in the FIG. 3 in a plan view shown switching position, for example, in the FIG. 6 shown in perspective.

The following is now based on the sequence of FIGS. 4 . 5 . 6 and 7 a switching sequence will be described in which first the circuit breaker is brought from its switch-on in its off or disconnected position and then an activation of the further switching device, ie the grounding switch.

The FIGS. 4 . 5 and 6 are each partially cut free to allow a view of the blocking element 14. For clarity, was in the FIGS. 4 . 5 and 6 dispense with a representation of the drive rod 19.

In the FIG. 4 the position of the drive lever 17 is shown, as it is located in the on state of the circuit breaker. The stop 17.1 is immersed in the first release area 28 of the blocking element 14, ie, in the in the FIG. 4 shown position of the blocking element 14, the drive lever 17 is movable from its closed position shown clockwise into its open position (see. FIG. 5 , Switch-off position). The pivotable pivot lever 13 is prevented by the position of the second blocking region 31 in its pivoting path at a movement, ie, an undesirable circuit of the other switching device (here earthing switch) is prevented. The position of the shoulder 26 is in the ON state of the drive lever 17, a drive of the blocking element 14 via the control lever 24 only to a limited extent possible, since the shoulder 26 strikes against the stop 17.1 of the drive lever 17 and so a movement of the second release area 30 in the Area of the pivoting plane of the pivotable pivot lever 13 prevented. In the figure, located between the shoulder 26 and the stop 17.1 of the drive lever 17 in the direction of movement Room to illustrate the operation shown oversized.

In order to enable a switching operation of the other switching device, now the drive lever 17 is to spend from the closed position of the circuit breaker in the disconnected position of the circuit breaker. For this purpose, the drive lever 17 is pivoted clockwise. The stop 17.1 of the drive lever 17 releases the movement path of the stop 26 of the blocking element 14, so that the first blocking region 27 is moved into the pivoting region of the stop 17.1 of the drive lever 17 by a movement of the control lever 24 (FIG. Fig. 5 ). During the movement of the blocking element 14, furthermore, the second blocking region 31 of the blocking element 14 is active with respect to the pivotable pivoting lever 13, so that a securing of the further switching device is also provided during a movement of the blocking element 14.

The FIG. 6 shows the completion of the in the FIG. 5 The stop 17.1 is located in the region of the first blocking region 27 of the blocking element 14, ie, a movement of the drive lever 17 with its stop 17.1 is prevented by the blocking element 14 with its first blocking region 27. The second release area 30 is located in the pivoting range of the pivotable pivot lever 13, ie, a rotational movement of the rotatable shaft 11 with the pivotable pivot lever 13 is made possible by immersion of the pivot lever 13 in the second release area 30. The second blocking region 31 protrudes beyond a wall of the traverse 2 and can image a blocking position of the circuit breaker by a correspondingly colored marking or inscription (cf. FIG. 2 ). The FIG. 2 forms the state of FIG. 6 from a different perspective.

Due to a blockade of the movement of the drive lever 17, the circuit breaker located in disconnected position is no longer switchable even in an attempt to move the kinematic chain of the circuit breaker.

In the FIG. 7 an external view of the traverse 2 is shown, wherein the blocking element 14 protrudes with its second blocking region 31 through a wall of the traverse and the pivotable pivot lever 13 is immersed in the second release area 30. The grounding rod 12 is retracted with its contact area in the associated mating contact of the first or second connection point 6, 7 of the switching pole A. Due to the circular cylindrical segment shape of the pivotable pivot lever 13, a movement of the blocking element 14 is already at the beginning of a movement, during a switching movement and after reaching the on state of the other switching device, here the ground state, prevented. Since such a movement is prevented, and the first blocking region 27 can not be moved out of the pivoting range of the stop 17.1 of the drive lever 17, so that a reliable prevention of a circuit of the circuit breaker via the blocking element 14 is given.

When switching off the further switching device, ie, when a cancellation of the grounding function of the same, a reverse sequence of the in the FIGS. 7 . 6 . 5 and 4 shown stages. When one of the devices (of the circuit breaker or of the further switching device) is switched on, the respective other device (ie the further switching device or the circuit breaker) is blocked by a switching movement via the blocking element 14.

Such a configuration of a drive arrangement is particularly suitable when using a circuit breaker with a disconnecting function, d. h., the circuit breaker perceives both the switching tasks, d. h., it interrupts nominal and operating currents up to short-circuit currents and also assumes a reliable disconnection function of the switching path when switched off. In the separated state of the relatively movable contact pieces 8, 9 can be secured via a reversal of the control lever 24, the disconnected position of the circuit breaker and an inadvertent turning on the circuit breaker are mechanically prevented.

However, it can also be provided that the control lever 24 is moved, for example, depending on the switching state of other devices. These further devices may be, for example, separate disconnectors or other switching devices, wherein the switching state is represented by the position of the control lever 24.

Claims (16)

1. Drive arrangement of a circuit breaker having a pivotable drive lever (17) and having a blocking element (14) which has a first blocking region (27) which can move into a pivoting region of the drive lever (17) and which has a first release region (28) for the pivotable drive lever (17),
   wherein
   the blocking element (14) has a second release region (30) and a second blocking region (31) for a pivotable pivoting lever (13) of a further switching device and the drive lever (17) can be pivoted about a first pivoting axis and the pivoting lever (13) can be pivoted about a second pivoting axis and the two pivoting axes are aligned substantially parallel, characterized in that the blocking element (14) can be moved substantially parallel to the pivoting axes.
2. Drive arrangement according to Claim 1,
   characterized in that
   the first blocking region (27) is arranged in a first stop surface and the second blocking region (31) in a second stop surface, wherein the two stop surfaces are arranged at an angle, in particular at right angles, to one another.
3. Drive arrangement according to Claim 2,
   characterized in that
   the two stop surfaces abut one another and border a body edge of the blocking element (14).
4. Drive arrangement according to one of Claims 1 to 3,
   characterized in that
   the blocking element is a profiled bolt.
5. Drive arrangement according to one of Claims 1 to 4,
   characterized in that
   the blocking element (14) is driven by a pivoting control lever (24) in the manner of a crank mechanism.
6. Drive arrangement according to one of Claims 1 to 5,
   characterized in that
   the blocking element (14) has a shoulder (26) which divides the blocking element (14) into a first and a second section (14.1, 14.2), wherein the first section (14.1) has a larger cross section than the second section (14.2), and the first blocking region (27) is located in the first section (14.1) and the second blocking region (31) in the second section (14.2).
7. Drive arrangement according to Claim 6,
   characterized in that
   the second release region (30) is located in the second section (14.2) and has a reduced cross section compared with the cross section of the second section (14.2).
8. Drive arrangement according to one of Claims 6 or 7,
   characterized in that
   the first release region (28) is located in the second section (14.2).
9. Drive arrangement according to one of Claims 1 to 8,
   characterized in that
   the drive lever (17) is mounted on a shaft (16) which protrudes through a fluid-tight encapsulation wall of an interrupter unit of the circuit breaker.
10. Drive arrangement according to one of Claims 1 to 9,
    characterized in that
    the pivoting lever (13) is formed in the manner of a sector of a circular cylinder.
11. Drive arrangement according to one of Claims 1 to 10,
    characterized in that
    a state indicator is arranged on the blocking element (14).
12. Drive arrangement according to Claim 11,
    characterized in that
    the blocking element (14) with the state indicator is moved through a wall.
13. Drive arrangement according to Claim 1 to 12,
    characterized in that
    the further switching device is a grounding switch.
14. Drive arrangement according to one of Claims 1 to 13,
    characterized in that
    the circuit breaker has a plurality of switching poles (A, B, C), which in each case have at least one drive lever (17) and which are in contact (20) with one another, and a blocking element (14) is associated with only one of the drive levers (17) of the switching poles (A, B, C).
15. Drive arrangement according to one of Claims 1 to 14,
    characterized in that
    the circuit breaker has a cross-member (2) with substantially U-shaped cross section, wherein the blocking element (14) is mounted within the contour bordered by the U-shaped cross section.
16. Drive arrangement according to Claim 15,
    characterized in that
    switching poles (A, B, C) of the circuit breaker are placed on the cross-member (2).

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