CN105103253A - electrical switchgear - Google Patents

Abstract

The application relates to an electrical switching device (10) having a series circuit consisting of a first disconnecting/earthing switch (TE1), a power switch (LS) and a second disconnecting/grounding switch (TE2). There is a switch drive (15) having a component provided with a first curved path (KB1) assigned to the first disconnecting/earthing switch (TE1), and the The component is provided with a second curved path ( KB2 ), which is assigned to the second disconnecting/grounding switch ( TE2 ), wherein the component can be driven by a single drive.

Description

electrical switchgear

The invention relates to an electrical switching device having a series circuit consisting of a first separating/earthing switch, a power switch and a second separating/grounding switch.

Such switching devices are generally known. It is likewise known here to assign a drive to each of the three switches, by means of which drive the respective switch can be switched into its switching state.

In such switching devices it may be necessary, for example, for two disconnecting/grounding switches to only allow grounding in sequence. This can be achieved, for example, in that the switching states of the two disconnecting/grounding switches are electronically monitored and, depending on the determined switching state, the drive for the respective disconnecting/grounding switch is influenced. In this way, simultaneous switching of the two disconnecting/grounding switches to the grounded state can thus be avoided by means of the monitoring of the switching state and the corresponding actuation of the drives of the two disconnecting/grounding switches.

The object of the invention is to improve the known switching device.

This object is solved by an electrical switching device according to claim 1 .

According to the invention there is a switch drive device which has a component which is provided with a first curved path which is assigned to the first disconnecting/grounding switch and which is provided with a second curved path track, the second curved track is assigned to the second disconnect/earth switch, wherein the component can be driven by a single drive.

In the present invention, the switching states of the two disconnecting/grounding switches can be predetermined via two curved paths. By means of the two curved paths, the change or sequence of the switching states of the two disconnecting/grounding switches can thus be set in advance in a desired manner. Since the two curved paths are arranged on the same component, only the provided switching states of the two disconnect/earth switches can occur. However, other switching states or changes in switching states must not occur.

Thus, two disconnecting/grounding switches can be interlocked in a desired manner with respect to their switching states by means of the invention. The costs for this locking are small here.

Further features, application possibilities and advantages of the invention emerge from the following description of exemplary embodiments of the invention, which are shown in the associated drawings. All described or illustrated features form the subject-matter of the invention by themselves or in any combination, independently of their summary in the claims or their reference and independently of their expression or representation in the description or in the drawings .

Figure 1 shows a schematic circuit diagram of an electrical switching device; Figure 2 shows a schematic perspective view of a first embodiment of a switch drive for the switching device of Figure 1; Figures 3a, 3b show a switch for the switch of Figure 1 Two schematic views of a second embodiment of a switch drive for a device; and FIG. 4 shows a schematic perspective view of a third embodiment of a switch drive for the switch device of FIG. 1 .

FIG. 1 shows an electrical switching device 10 , in particular a high-voltage switching device. The switching device 10 has a series circuit consisting of a first disconnecting/grounding switch TE1 , a power switch LS connected thereto, and a second disconnecting/grounding switch TE2 connected thereto.

The first isolating/grounding switch TE1 , the power switch LS and the second isolating/grounding switch TE2 are each constructed as independent switching devices. The power switch LS and/or the two isolating/grounding switches TE1 , TE2 can be installed in a container filled with insulating gas.

The two separating/grounding switches TE1 , TE2 each have three connections 11 , 12 , 13 , wherein connection 13 is grounded. The first input/output EA1 is connected to the terminal 11 of the first disconnecting/grounding switch TE1 , while the second input/output EA2 is connected to the terminal 11 of the second disconnecting/grounding switch TE2 . The power switch LS with its one connection is connected to the connection 12 of the first disconnecting/grounding switch TE1 , and the power switch LS with its other connection is connected to the connection 12 of the second disconnecting/grounding switch TE2 .

Each of the two disconnecting/grounding switches TE1, TE2 can have the following three switching states: the two connection terminals 11, 12 are connected to each other; the three connection terminals 11, 12, 13 are not connected to each other; the connection terminal 11 is connected to the connection terminal 13 is connected and therefore grounded. These three switching states are referred to below as states P11 , P12 , P13 of the first disconnecting/grounding switch TE1 and states P21 , P22 , P23 of the second disconnecting/grounding switch TE2 .

The two disconnecting/grounding switches TE1 , TE2 are mechanically coupled to a common switch drive 15 . The mechanical couplings are each shown only schematically as arrows 16 , 17 in FIG. 1 . The switching drive 15 of FIG. 1 is described in more detail below with reference to FIG. 2 .

The power switch LS is closed and thus conducts the connection or is open and thus causes an interruption. Switching between two switching states of the power switch LS can be switched between two switching states by means of a mechanism, indicated only schematically by arrow 19 in FIG. 1 .

A first exemplary embodiment 15 ′ of a common switch drive 15 for the two disconnecting/grounding switches TE1 , TE2 is shown in more detail in FIG. 2 . The mechanical coupling 16 to the first disconnecting/grounding switch TE1 is marked on the left side of the switch drive 15 ′, and the mechanical coupling 17 to the second disconnecting/grounding switch TE2 is marked on the right side of the switch drive 15 ′. In addition, the switching states P11 , P12 , P13 , P21 , P22 , P23 of the two disconnecting/grounding switches TE1 , TE2 are indicated in FIG. 2 , ie each has an associated electrical switch symbol. It should be pointed out that the switch symbols shown are only present for illustrative purposes and do not necessarily have to be present.

The switch drive 15' has a carrier 21 on which an electric motor 22 is held. The electric motor 22 has a drive shaft 23 which carries a cam disk 24 . The axis of the cam disk 24 is aligned coaxially with the drive shaft 23 of the electric motor 22 . The cam disc 24 can thus be turned by the motor 22 about its axis in both directions.

There are two curved paths KB1 , KB2 in the cam disk 24 , which are introduced here as recesses in the cam disk 24 . The first curved path KB1 is assigned to the first disconnecting/grounding switch TE1 and the second curved path KB2 is assigned to the second disconnecting/grounding switch TE2.

Engaging in the first bending path KB1 is the first probe AS1 , which is held on the rod 26 . The rod 26 can be displaced in translation in the guide 27 . The guide 27 is fixed on the bracket 21 . In a corresponding manner, the second probe AS2 engages into the second bending path KB2 , wherein the second probe AS2 is held on a corresponding rod 28 , which itself can be displaced in translation in the guide 29 .

For descriptive purposes, each of the two levers 26, 28 is provided with a status indicator SA1, SA2. The first state indicator SA1 shows: which of the three possible switching states P11, P12, P13 is occupied by the first separating/earthing switch TE1; Which of the possible switching states P21, P22, P23. It should be noted that the aforementioned status indicators SA1 , SA2 are present for illustrative purposes only and are not mandatory.

According to FIG. 2 , the lever 26 is an integral part of the mechanical coupling 16 , via which the switch drive 15 is connected to the first disconnecting/grounding switch TE1 . Correspondingly, the lever 28 is an integral part of the mechanical coupling 17 , via which the switch drive 15 is connected to the second disconnecting/grounding switch TE2 . A translational movement of the corresponding lever 26 , 28 thus leads to a movement and possibly a change of the switching state of the associated disconnecting/earthing switch TE1 , TE2 .

FIG. 2 shows the initial state of the cam disk 24 in which the two probes SA1 , SA2 are located approximately at the start of the associated curved path KB1 , KB2 . As can be seen from the two status indicators SA1, SA2, in this initial state the two disconnecting/grounding switches TE1, TE2 are in the switching state P11, P21 in which the connection terminal 11 of the disconnecting/grounding switch TE1, TE2 , 12 are connected to each other respectively.

Assumption: The power switch LS is in its closed state. According to FIG. 1 , it is thus possible for a current to flow from the first input/output EA1 to the second input/output EA2 or vice versa.

If the power switch LS is now opened, the two disconnecting/grounding switches TE1 , TE2 can be switched by the common switch drive 15 ′, for example as follows.

A first counterclockwise rotation of the cam disk 24 results in the transition of the two disconnect/earth switches TE1 , TE2 into their switching states P12 , P22 . This means that the terminals 11 , 12 , 13 of the two disconnecting/grounding switches TE1 , TE2 are not connected to each other and the two disconnecting/grounding switches TE1 , TE2 are therefore open but not grounded.

Another counterclockwise rotation of the cam disk 24 has the result that the first disconnecting/earthing switch TE1 remains in its switching state P12 , while the second disconnecting/grounding switch TE2 transitions into its switching state P23 . The second input/output EA2 is thus grounded via the second disconnect/ground switch TE2.

A further counterclockwise rotation of the cam disk 24 has the result that the second disconnect/earth switch TE2 remains in its switching state P23 , while the first disconnect/earth switch TE1 transitions into its switching state P13 . The first input/output EA1 is thus grounded via the first disconnect/ground switch TE1.

The two inputs/outputs EA1, EA2 are therefore grounded.

Rotation of the cam disc 24 in the opposite direction, ie clockwise, has the effect that the two disconnect/earth switches TE1 , TE2 return to their initial state, ie the switching state P11 , P21 .

It goes without saying that by means of a corresponding development of the two curved paths KB1 , KB2 , more or less changes and/or other changes in the switching states of the two disconnecting/grounding switches TE1 , TE2 can also be brought about. . It is likewise self-evident that the switching state change rate can also be influenced by a corresponding actuation of the electric motor 22 .

In FIGS. 3 a , 3 b a second embodiment 15 ″ of a common switch drive 15 for two disconnecting/grounding switches TE1 , TE2 is shown. FIG. 3 a is a plan view and FIG. 3 b is a rotation of the switch drive 15 ″ 90° front view.

The switch drive 15 ″ has a bracket 41 on which a motor 42 is held. The motor 42 has a drive shaft 43 which carries a cam cylinder 44 . The shaft of the cam cylinder 44 is oriented coaxially with the drive shaft 43 of the motor 42 The cam cylinder 44 can thus be turned by the motor 42 about its axis in both directions.

There are two curved paths KB1 , KB2 in the cam cylinder 44 , which are introduced here as recesses in the cam cylinder 44 . The first curved path KB1 is assigned to the first disconnecting/grounding switch TE1 and the second curved path KB2 is assigned to the second disconnecting/grounding switch TE2.

Engaging in the first bending path KB1 is a first probe AS1 , which is fastened to the rocker 46 . The rocker 46 is fastened to the bracket 41 and is pivotable there about an axis 47 . In a corresponding manner, the second probe AS2 engages into the second bending path KB2 , wherein the second probe AS2 is fastened to a corresponding rocker 48 which is pivotally held on the support 21 about an axis 49 .

In the switch drive 15'' of Figures 3a, 3b, the rotation of the cam cylinder 44 results in a pivotal movement of the two rockers 46, 48. Unlike the switch drive 15' of Figure 2 (in which there is a switch drive 15' Translational coupling 16, 17) with the two separating/grounding switches TE1, TE2, the coupling 16, 17 in the switch drive 15" of Figs. 3a, 3b is thus rotational. Based on the two axes 47, 49, the two separating/earthing switches TE1, TE2 can be adjusted by the switch drive 15" of Figs. 3a, 3b.

FIG. 4 shows a third exemplary embodiment 15 ″' of a common switch drive 15 for the two disconnecting/grounding switches TE1 , TE2 .

The switch drive 15"' has a bracket 51 on which a motor 52 is held. The motor 52 has a drive shaft with a gear 53. A cam plate 54 is provided which has toothing on its upper longitudinal side , and the cam plate is movably arranged in the track 55 with its lower longitudinal side. The gear 53 connected with the motor 52 is engaged in the tooth portion of the cam plate 54. The cam plate 54 can therefore be moved along the track 55 by the gear 53 and the tooth portion Move in two longitudinal directions.

There are two curved paths KB1 , KB2 in the cam plate 54 , which are introduced here as recesses in the cam plate 54 . The first curved path KB1 is assigned to the first disconnecting/grounding switch TE1 and the second curved path KB2 is assigned to the second disconnecting/grounding switch TE2.

The first probe AS1 , which is fastened to the rocker 56 , engages in the first bending path KB1 . The rocker 56 is held on the bracket 51 and is pivotable there about an axis 57 . In a corresponding manner, the second probe AS2 engages into the second bending path KB2 , wherein the second probe AS2 is fastened to a corresponding rocker 58 which is pivotally held on the support 51 about an axis 59 .

In the switch drive 15'' of Figure 4, the longitudinal movement of the cam plate 54 in the track 55 results in the pivotal movement of the two rockers 56, 58. Unlike the switch drive 15' of Figure 2 (where there is a switch drive The translational coupling 16, 17) of the device 15' to the two separating/grounding switches TE1, TE2), the coupling 16, 17 in the switch drive 15"' of FIG. 4 is thus rotational. Based on the two axes 57 , 59 the two disconnecting/earthing switches TE1 , TE2 can be adjusted by the switch drive 15 ″ of FIG. 4 .

It should be pointed out that in all three embodiments of the switch drive device 15 other drive devices can also be provided instead of the motors 22, 42, 52, such as pneumatic drives or hydraulic drives or magnetic drives or manual drives or something like that. The drive does not have to be designed to rotate like the electric motors 22 , 42 , 52 , but can also perform longitudinal or other movements.

Claims (9)

1. an electric switch equipment (10), have by the first separation/earthed switch (TE1), power switch (LS) is separated the series circuit that/earthed switch (TE2) forms with second, it is characterized in that, there is driving mechanism for switch (15), described driving mechanism for switch has as lower member: as described in component be provided with the first serpentine track (KB1), described first serpentine track configures to the first separation/earthed switch (TE1), and described component is provided with the second serpentine track (KB2), described second serpentine track configures to the second separation/earthed switch (TE2), wherein said component can be driven by unique drive unit.

2. switchgear according to claim 1 (10), wherein, described component is configured to cam disc (24) or cam circle cylinder (44) or lobe plate (54).

3. according to the switchgear (10) one of the claims Suo Shu, wherein, two serpentine track (KB1, KB2) recess is configured to respectively, and wherein give each configuration probe (AS1, AS2) in serpentine track (KB1, KB2), described probe is engaged in affiliated serpentine track (KB1, KB2).

4. the switchgear (10) according to claim 2 and 3, wherein, two probe (AS1, AS2) connect with bar (26,28) respectively, and wherein corresponding bar (26,28) translation of affiliated probe (AS1, AS2) can be passed through.

5. the switchgear (10) according to claim 2 and 3, wherein, two probes (AS1, AS2) respectively with rocking bar (46,48; 56,58) connect, and wherein corresponding rocking bar (46,48; 56,58) can be in rotary moving by affiliated probe (AS1, AS2).

6. according to the switchgear (10) one of the claims Suo Shu, wherein, two separation/earthed switches (TE1, TE2) have three on off states respectively, and wherein can by any change of described component described on off state given in advance.

7. switchgear according to claim 6 (10), wherein, the outer change speed that can be affected on off state by drive unit thus.

8. according to the switchgear (10) one of the claims Suo Shu, wherein, two separation/earthed switches (TE1, TE2) can at random lock mutually.

9. according to the switchgear (10) one of the claims Suo Shu, wherein, described component can be driven by motor (22,42,52).