EP3022756B1 - On-load tap changer - Google Patents

Description

The present invention relates to an on-load tap-changer. The on-load tap-changer comprises a diverter switch insert, a switching tube rotatable about an axis, to which at least one switching module is assigned. The switching module comprises at least one switching segment attached to the switching segment and a resistor arrangement. The switching module is assigned to an inner wall of an oil vessel at least one actuator assembly.

On-load tap-changers (abbreviated OLTC) are well known and commonly used in the art. They are used for uninterrupted switching between different winding taps of tapped transformers.

Such on-load tap-changers are divided into load selectors and diverter switches with selectors.

In a diverter switch with selector, such as in the German patent DE 100 55 406 C1 discloses the selector, consisting of a fine selector and possibly a preselector, arranged below the diverter switch. The selector is used for powerless selection of the respective new winding tapping of the tapped transformer to be switched to. The diverter switch is used for subsequent rapid and uninterrupted switching from the wired to the new, preselected winding tap to be wired.

Load selector, such as in the German patent DE 38 33 126 C2 described, serve as well as the diverter switch with selector to switch the taps of the control windings of these tapped transformers under load and thus specifically compensate for voltage changes at the consumer. By eliminating the separation of the diverter switch from the selector, load selectors are less expensive to produce. Load selectors have only a limited field of application, such as the limited number of stages. A similar load selector is from the GB 636 276 A known.

Both types of on-load tap-changers are operated by a motor drive during the switchover. By the motor drive an output or input shaft is moved, which raises a power storage. If the energy storage fully wound, ie strained, he is unlatched, releases his energy abruptly and operated in the period of milliseconds (ms) a diverter switch insert, which performs a specific switching sequence during load switching. In this case, different switch contacts and resistor contacts are actuated in a specific time sequence. The switching contacts serve for the direct connection of the respective winding tap with the load dissipation, the resistor contacts for short-term wiring, ie bridging by means of one or more switching resistors. Advantageously, vacuum interrupters are used as switching elements for load switching. This is due to the fact that the use of vacuum interrupters for load switching prevents arcing in the oil and thus the oil pollution of diverter switch oil, as for example in the German patents DE 195 10 809 C1 and DE 40 11 019 C1 as well as the German Offenlegungsschriften DE 42 31 353 A1 and DE 10 2007 004 530 A1 described.

A disadvantage of these on-load tap changers are the centrally rotating gear and the actuators and the fixed contact and resistor assemblies. This is due to the fact that complex support elements are necessary, for example, for the switching segments or the resistor arrangement and these elements must be arranged differently in the load selector. Furthermore, flexible contact or current connections are necessary. In addition, some components must be manufactured so accurately and distortion-free that they can be installed in the on-load tap-changer. If these components are manufactured using an injection molding process, a separate injection mold must be produced for each of the different components, which increases the cost of an on-load tap-changer.

From the DE 10 2011 014 325 A1 is a load selector with a switching resistance of a meandering wire helix known. In this case, the wire helix is fastened to the resistance carrier via at least two resistance holders. The resistor can thus be preassembled and attached directly to the switching column.

Thus, the German patent application DE 1 231 805 B already a tap selector for tap changers of control transformers, which is preferably arranged below a diverter switch and is constructed according to a modular principle, so that the tap selector for various tap changer is operational.

The object of the invention is to provide a simple and inexpensive on-load tap-changer, which uses a large number of identical parts with regard to load selectors or diverter switches, so that different functionalities of the on-load tap-changer can be realized.

This object is achieved by on-load tap-changer comprising the features of claim 1.

The on-load tap-changer according to the invention comprises a diverter switch insert and a switching tube rotatable about an axis. The switching tube is assigned at least one switching module. In this case, the switching module of the on-load tap-changer comprises at least one switching segment fastened to the switching tube and a resistor arrangement. On an inner wall of an oil vessel, the switching module is associated with an actuating element.

According to the invention, the at least one resistance arrangement has a plurality of individual and structurally identical resistance elements. It is further provided that the actuating arrangement comprises a plurality of identical actuating elements which are assigned to the switching module on the inner wall of the oil vessel. In this case, depending on the arrangement of the at least one identical switching segment, the at least one resistor arrangement and the mounting of the plurality of identical actuating elements on the inner wall of the oil tank of the on-load tap-changer either a load selector or a diverter switch.

Since the individual components of the switching modules can be used both in a load selector and in a diverter switch, this on-load tap-changer creates a large number of identical parts. These can then be assembled according to a modular principle, as further described below. By using these common parts can save immense manufacturing costs, so that a cost-effective on-load tap-changer is created.

In a first embodiment of the invention, the identical resistance elements each sit in a sector-shaped carrier and thus form a structurally identical resistor arrangement, which is arranged in accordance with the load selector or diverter switch to allow the functionality of the load selector or diverter switch.

In a further embodiment of the invention, the identical actuating elements for attachment to the inner wall of the oil vessel have a plurality of holes and a plurality of openings. Furthermore, the identical actuators have formed an upper cam and a lower cam.

In particular, each switching segment may comprise two vacuum interrupters, each associated with an actuating lever, and a plurality of movable contacts for the diverter contact and a plurality of movable contacts for the tap contacts at the diverter switch or for the selector contacts at the load selector.

In a preferred embodiment of the on-load tap changer according to the invention, the sector-shaped carrier of the structurally identical resistor arrangement, a switching segment and a high-mass element are arranged around the axis of the switching tube in the switching module. In addition, corresponding to the inner wall of the oil pan actuators are mounted in such a way that the on-load tap-changer according to the invention in this embodiment is a load selector.

In particular, in this embodiment of the on-load tap changer, as a load selector, the switching tube may support a bracket which supports a switching segment, a resistor assembly, and the high-mass member radially about the axis of the switch ear.

In a further preferred embodiment of the on-load tap-changer according to the invention, the sector-shaped carriers of several structurally identical resistor arrangements are arranged in such a way around the axis of the switching tube in the switching module that the resulting arrangement of the resistance arrangements surrounds the switching tube. In the direction of the axis of the switching tube are spaced apart from the array of resistor arrangements three switching segments around the switching tube around. In addition, corresponding actuating elements are mounted on the inner wall of the oil vessel such that the on-load tap-changer according to the invention is a diverter switch which is suitable for interacting with a separate selector.

In particular, in this embodiment, the on-load tap changer can carry, as a diverter switch, the switching tube a first holding device for the resistance arrangements, so that these surround the switching tube. In this case, the switching tube carries in the axial direction a second holding device, which holds the three associated switching segments around the switching tube around.

Regardless of whether the on-load tap-changer is a load selector or diverter switch with selector according to the invention, each operating lever of the selector segment carries a roller which cooperates with the upper control cam and the lower control cam of the actuators, respectively.

Likewise, at least one diverter contact and at least one stage contact or the selector contact can each be connected to an inner surface of each actuating element Retaining element connected and supported on an outer wall of the oil vessel. In this case, then an electrical connection element of the respective Ableitkontakts or tap contact is guided through a shield cap to the outer wall of the oil vessel.

In another embodiment, the diverter contact is a continuous slip ring. This results from the arrangement of at least the identical switching segments and the identical resistor arrangements, so that the on-load tap changer is a load selector and the diverting contact is formed as a continuous diverter ring or slip ring.

In a further embodiment, the diverting contact consists of at least one separate slip ring segment. This results from the arrangement of at least the identical switching segments and the identical resistor arrangements, so that the on-load tap changer is a diverter switch and the diverting contact is a ring segment or a slip ring segment.

In a further embodiment of the invention, a flywheel is mounted on the switching tube. Preferably, the flywheel consists of a first part flywheel and a second part flywheel. The shift tube holds the first part flywheel and the second part flywheel. The distribution of the flywheel in the first part of the flywheel and the second part flywheel facilitates their installation on the shift tube. Furthermore, the flywheel carries the listed above for load selector massive element.

In a further preferred embodiment, the load selector has three switching modules arranged on the switching tube along the axis, so that this is a three-phase load selector.

In another preferred embodiment, the diverter switch has three switching modules arranged radially on the switching tube around the axis, so that this is a three-phase diverter switch. Again, the switching tube holds the flywheel.

The flywheel, consisting of first partial flywheel mass and second flywheel mass, essentially serves to provide a corresponding mass so that the momentum transferred from the energy store to the switching tube effects a defined pivotal movement of the switch tube. This ensures that defined switch positions of the on-load tap-changer are set.

Fig. 1

eine Perspektivansicht eines erfindungsgemäßen Laststufenschalters in Form eines dreiphasigen Lastwählers;

Fig. 2

eine Schnittansicht des erfindungsgemäßen Lastwählers nach Fig. 1;

Fig. 3

eine Draufsicht eines sektorförmigen Trägers, in dem die baugleichen Widerstandselemente der Widerstandanordnung sitzen;

Fig. 4

eine Perspektivansicht eines einzelnen Betätigungselements für den erfindungsgemäßen Laststufenschalter;

Fig. 5

eine Schnittansicht eines Ausschnitts des Laststufenschalters mit Betätigungselementen nach Fig. 4, die an einer Innenwand des Ölgefäßes befestigt sind;

Fig. 6

eine Schnittansicht des Lastwählers entlang der in Fig. 1 eingezeichneten Schnittlinie A-A;

Fig. 7

eine Perspektivansicht eines Schaltsegments, das mit den entsprechenden Steuerkurven des an der Innenwand des Ölgefäßes angeordneten Betätigungselements zusammenwirkt, wobei Teile der Wand des Schaltsegments weggelassen sind, um den inneren Aufbau zu verdeutlichen;

Fig. 8

eine Perspektivansicht des Lastumschaltereinsatzes des dreiphasigen Lastwählers nach Fig. 1, wobei die drei am Schaltrohr befestigten Schaltsegmente und das massereiche Element zu sehen sind und wobei das Schaltrohr eine erste Teilschwungmasse und eine zweite Teilschwungmasse einer Schwungmasse haltert;

Fig. 9

eine weitere Perspektivansicht des Lastumschaltereinsatzes des dreiphasigen Lastwählers nach Fig. 1, wobei die drei am Schaltrohr befestigten Widerstandsanordnungen und die beiden am Schaltrohr gehalterten Teilschwungmassen nach Fig. 8 dargestellt sind;

Fig. 10

zeigt eine perspektivische Schnittansicht zur Verdeutlichung des inneren Aufbaus eines erfindungsgemäßen Laststufenschalters in Form eines dreiphasigen Lastumschalters; und

Fig. 11

eine Schnittansicht des Lastumschalters entlang der in Fig. 10 eingezeichneten Schnittlinie B-B.

In the following, the invention and its advantages will be described in more detail with reference to the accompanying drawings. Show it:

Fig. 1

a perspective view of an on-load tap changer according to the invention in the form of a three-phase load selector;

Fig. 2

a sectional view of the load selector according to the invention Fig. 1 ;

Fig. 3

a plan view of a sector-shaped carrier in which sit the identical resistance elements of the resistor assembly;

Fig. 4

a perspective view of a single actuator for the on-load tap-changer according to the invention;

Fig. 5

a sectional view of a section of the on-load tap-changer with actuators after Fig. 4 which are attached to an inner wall of the oil vessel;

Fig. 6

a sectional view of the load selector along in Fig. 1 drawn section line AA;

Fig. 7

a perspective view of a switching segment, which cooperates with the corresponding control cams of the arranged on the inner wall of the oil pan actuating member, wherein parts of the wall of the switching segment are omitted, to illustrate the internal structure;

Fig. 8

a perspective view of the diverter switch insert of the three-phase load selector after Fig. 1 wherein the three switch segments attached to the shift tube and the high-mass element can be seen, and wherein the shift tube supports a first partial flywheel mass and a second partial flywheel mass of a flywheel mass;

Fig. 9

another perspective view of the diverter switch insert of the three-phase load selector after Fig. 1 , wherein the three resistor arrangements fastened to the switching tube and the two partial flywheel masses retained on the switching tube follow Fig. 8 are shown;

Fig. 10

shows a sectional perspective view to illustrate the internal structure of an on-load tap changer according to the invention in the form of a three-phase diverter switch; and

Fig. 11

a sectional view of the diverter switch along the in Fig. 10 drawn section line BB.

For identical or equivalent elements of the invention, identical reference numerals are used. Furthermore, for the sake of clarity, only reference symbols are shown in the individual figures, which are required for the description of the respective figure. The illustrated embodiments are merely examples of how the on-load tap changer according to the invention can be configured and thus do not constitute a final limitation of the invention.

Fig. 1 shows a perspective view of a three-phase on-load tap changer or load selector 1 according to the invention. The load selector 1 has a drive 3, such as an electric motor, with a gear 5, which raises a power accumulator, not shown. If the stored energy is fully absorbed, ie tensioned, it is unlatched, releases its energy abruptly and actuates a switching tube 15 of a diverter switch insert 14. The rotating switching tube 15 is held in an oil vessel 18. The oil vessel 18 is closed at the top with a lid 19 and also carries a bottom 21st

The load selector 1 according to the invention has a first phase L1, a second phase L2 and a third phase L3, which are arranged one above the other in the oil vessel 18. Over the three phases L1, L2, L3 sits a preselector 37. In the view shown here electrical connection elements 38 are provided for preselector contacts on the oil vessel wall 17 of the oil vessel 18. Electrical connection elements 39 for stage contacts 392 (see Fig. 5 -7 ) of the three phases L1, L2, L3 are also arranged on the load selector 1 so that they engage through the oil vessel wall 17 of the oil vessel 18.

Fig. 2 shows a sectional view of the load selector 1 according to the invention with diverter switch insert 14 after FIG. 1 , The diverter switch insert 14 includes a rotatable about an axis A switching tube 15. The switching tube 15 are here three switching modules 24 according to the invention assigned, ie each phase L1, L2, L3 has a switching module 24. In this case, each switching module 24 of a load selector 1 comprises a switching segment 25 fastened to the switching tube 15 and at least one identical resistor arrangement 27, which has a plurality of individual and identical resistance elements 28 includes. These identical resistance elements 28 sit, as in Fig. 3 shown in a sector-shaped carrier 29 which forms the identical resistance arrangement 27 together with the resistance elements 28.

Furthermore, as in Fig. 2 shown assigned to each switching module 24 on an inner wall 20 of the oil vessel 18 at least one actuating element 50. Each actuating arrangement 41 comprises several separate and identically constructed actuating elements 50. The actuating elements 50 are preferably adapted to the contour of the inner wall 20 of the oil vessel 18 and substantially plate-shaped.

A single such actuator 50 is in a perspective view in FIG Fig. 4 shown. For fixing the actuating element 50 to the inner wall 20 of the oil vessel 18, as in the following Fig. 5 shown, the actuator 50 has at least one bore 60 for the assembly and the implementation of the electrical connection elements 39 of the step contacts 392 (see Fig. 5 . 7 ) on. Furthermore, each actuating element 50 has at least one opening 62. The openings 62 are used to carry out at least two holding elements 31 for the diverter ring 391 (see Fig. 5 . 7 . 10 ) and in the first phase L1 of the load selector in addition to performing a single electrical connection element (not shown) for the diverter 391. In addition, the actuator 50 has an upper cam 51 and a lower cam 52, which is used to actuate the in Fig. 7 shown vacuum interrupters 33, 34 are used.

Fig. 5 shows a sectional view of a section of the load selector with actuators 50 after Fig. 4 , The actuators 50 are attached to the inner wall 20 of the oil vessel 18. Here is the respective actuator 50 via the at least two holes 60 (see Fig. 4 ) and the at least one breakthrough 62 (see Fig. 4 ), each with a holding element 31 on the inner wall 20 of the oil vessel 18 is supported. The holding elements 31 are mounted in such a way that, in the embodiment shown here, a diverting ring 391 and two stepped contacts 392 are thus retained on the inner surface 56 of the respective actuating element 50. Other embodiments may also provide other arrangements of the diverter ring 391 and the diverter contacts 391 and the stage contacts 392, respectively.

Each of the step contacts 392 is in each case connected to an electrical connection element 39 which is guided to the outer wall 16 of the oil vessel 18. In particular, as shown here, the diverting contact is preferably a diverter ring 391.

Fig. 6 shows a sectional view along the section line AA Fig. 1 of the load selector 1, wherein a plan view of the first phase L1 is shown. As shown here, sitting on the inner wall 20 of the oil vessel 18 for the first phase L1 to the contour of the inner wall 20 of the oil vessel 18 adapted actuators 50, which constitute the actuating assembly 41. The electrical connection elements 39 for the step contacts 392, not shown here, and the electrical connection element 68 for the diverter ring 391, not shown here, engage through the corresponding actuators 50 and through the oil vessel wall 17 of the oil container 18 to its outer wall 16. The shield caps 30 on the outer wall 16 of FIG Oil vessel 18 hold the arranged on the inner wall 20 of the oil vessel 18 actuators 50. For this purpose, the electrical connection elements 39 for the step contacts 392 and the electrical connection element 68 for the diverter 391 via the holding elements 31 (not shown here, see Fig. 5 ) with the associated umbrella caps 30 together such that the actuators 50 are supported on the inner wall 20 of the oil vessel 18. The umbrella caps 30 rest on the outer wall 16 of the oil vessel 18. Each of the actuators 50 has the upper cam 51 and the lower cam 52 (see Fig. 5 ) to cooperate with corresponding and provided with rollers 43 operating levers 45 of the switching segment 25 of the corresponding phase L1, L2, L3.

Further, the switching tube 15 carries in each phase L1, L2, L3 a holder 40, in addition to the resistor assembly 27 and the switching segment 25 a massive element 36 are mounted radially about the axis A of the switching tube 15. The switching segment 25 is in this case mounted with its movable contacts 29S for step contacts 392 and movable contacts 29A for Ableitkontakte 391 (see Fig. 7 ) that the rollers 43 of the actuating lever 45 with the respective upper and lower control cams 51, 52 of the actuators 50 cooperate to actuate two vacuum switching tubes 33, 34 in each switching segment 25. this shows Fig. 7 in a perspective view. Since all other reference numerals shown here already in the previous descriptions of the FIGS. 1 to 6 have been explained, is dispensed with a re-description of this point.

As in further perspective views of the load selector 1 according to the invention in FIG Fig. 8 and 9 In a preferred embodiment, this has a flywheel mass 35. This preferably consists of a first partial flywheel mass 351 and a second partial flywheel mass 352 and also carries the massive element 36. This massive element 36 and the flywheel 35 are needed to support the temporal movement of the switching operation, so that the rotation of the switching tube 15 causing triggering of the energy storage performs a defined circuit or defined setting of the individual switching states of the load selector. From the Fig. 8 and 9 It can be seen that the diverter switch insert 14 consists of three identical switching modules 24. Each switching module 24 has mounted on the switching tube 15, the switching segment 25 and the resistor assembly 27.

Fig. 10 The diverter switch 1 also comprises a rotatable about an axis A switching tube 15. Again, the switching segments 25 and the individual combined in identical resistance arrangements 27 identically constructed resistance elements 28 are as Looking at switching module 24, which also, as in the previous Fig. 1 to 9 described load selector, are attached to the switching tube 15. Each resistor assembly 27 has the plurality and the same resistance elements 28, which also in a sector-shaped carrier 29 (see Fig. 3 ) to sit.

In the embodiment shown here, the diverter switch 1 are per switching module 24 three identical resistance arrangements 27, with sector-☐ carrier 29 and the identical resistance elements 28, arranged around the axis A of the switching tube 15 around that the arrangement of the identical resistor arrangements 27, the switching tube 15 encloses. The arrangement of the identical resistor assemblies 27 is spaced in the direction of the axis A of the switching tube 15 of the three switching segments 25, which are also mounted around the switching tube 15 around. As with the load selector, a plurality of actuating elements 50 on the inner wall 20 of the oil vessel 18 of the diverter switch 1 are here at the diverter switch 1 according to the already in Fig. 4 attached manner attached.

Each of the switching segments 25 has a plurality of movable contacts 29S for electrically contacting the selector contacts 84, which are identical in construction to the step contacts 392 of the load selector Fig. 7 are. Likewise, the switching segment 25 carries a plurality of movable contacts 29A for the Ableitkontakt 391, which is a ring segment of the diverter ring in this embodiment. The diverter 391 also functions as a guide segment. For this purpose, guide rollers 47 are provided on the switching segment 25, which engage above and below the guide segment and thus guide the switching segments 25 during the rotation of the switching tube 15.

The switching tube 15 of the diverter switch 1 according to the invention carries a first Holding device 81 for the resistance elements 28, so that the resulting resistor assembly 27 surrounds the switching tube 15. In addition, here in the axial direction, the switching tube 15 carries a second holding device 82, which supports the three switching segments 25 around the switching tube 15 around.

Fig. 11 shows a sectional view of the diverter switch 1 along the in Fig. 10 drawn section line BB. To the switching tube 15, three identical switching segments 25 are arranged, each of which cooperates with an associated actuating element 50 on the inner wall 20 of the oil vessel 18. The three actuators 50 form the actuator assembly 41. As in the description Fig. 4 Each of the switching segments 25 comprises two, not shown here, vacuum tubes, each of which cooperates with an actuating lever 45 which carries a roller 43. The rollers 43 cooperate with the upper control cam 51 and the lower control cam 52. The switching module 24 comprises in the first phase L1, the second phase L2 and the third phase L3 in each case a switching segment 25 and a resistor arrangement arranged underneath 27. In each of the phases L1, L2 or L3, an actuating element 50 is provided which corresponds to the in Figure 4 has shown shape and also in the in Fig. 6 shown load selector 1 is used. The electrical connection elements 85, 86 for the selector contacts 84 (see Fig. 10 ) and the electrical connection elements 68 for the Ableitkontakt 391 engage through the actuators 50 and through the oil vessel wall 17 of the oil vessel 18 to the outer wall 16. The electrical connection element 68 of the respective Ableitkontakts 391 and the electrical connection element 39 of the respective tap contact 392 are further by the respective Umbrella caps 30 passed through to the outer wall 16 of the oil vessel 18.

LIST OF REFERENCE NUMBERS

1

On-load tap-changer, diverter switch, load selector

3

drive

5

transmission

14

Diverter switch insert

15

switching tube

16

Outer wall of the oil vessel

17

Oil vessel wall

18

oil vessel

19

cover

20

Inner wall of the oil vessel

21

ground

24

switching module

25

switching segment

27

resistor arrangement

28

resistive elements

29

sector-shaped carrier

29A

movable contact for discharge contact

29S

mobile contact for step contact

30

canopy

31

retaining element

33

Vacuum interrupter

34

Vacuum interrupter

35

Inertia

351

first partial flywheel

352

second partial flywheel

36

massive element

37

selection

38

electrical connection element for preselector contact

39

electrical connection element for step contact

391

Discharge contact, diverting ring, guide ring, ring segment

392

stages Contact

40

bracket

41

actuator assembly

43

role

45

actuating lever

47

leadership

50

jig

51

upper control curve

52

lower cam

56

Inner surface of the actuating element

60

drilling

62

breakthrough

68

electrical connection element for discharge contact / discharge ring

81

first holding device

82

second holding device

84

voter contact

85

electrical connection element for selector contact

86

electrical connection element for selector contact

A

axis

A-A

intersection

B-B

intersection

L1

first phase

L2

second phase

L3

third phase

Claims (15)

1. On-load tap changer (1), with a load changeover switch insert (14)
   with a switching tube (15), which is rotatable about an axis (A) and with which at least one switching module (24) is associated, wherein the switching module (24) comprises at least one switching segment (25), which is fastened to the switching tube (15), and a resistance arrangement (27) and an actuating arrangement (41) is associated with the switching module (24) at an inner wall (20) of an oil tank (18), wherein the actuating arrangement (41) comprises a plurality of identical actuating elements (50), which are associated with the switching module (24) at the inner wall (20) of the oil tank (18),
   characterised in that
   the at least one resistance arrangement (27) comprises a plurality of individual and identical resistance elements (28), wherein
   the on-load tap changer is a load selector (1) in the case of arrangement of the at least one identical switching segment (25), the resistance arrangement (27) and the mounting of the plurality of identical actuating elements (50) at the inner wall (20) of the oil tank (18) in one plane, and
   a load changeover switch (1) of an on-load tap changer is formed in the case of arrangement, at a spacing in the direction of the axis A of the switching tube (15), of the resistance arrangement (27) from the at least one identical switching segment (25) and the plurality of identical actuating elements (50) at the inner wall (20) of the oil tank (18).
2. On-load tap changer (1) according to claim 1, wherein the identical resistance elements (28) are seated in a sector-shaped support (29) and thus form an identical resistance arrangement (27).
3. On-load tap changer (1) according to one of the preceding claims, wherein each of the identical actuating elements (50) has a plurality of bores (60) and a plurality of passages (62) for the fastening to the inner wall (20) of the oil tank (18) and is formed with an upper control cam (51) and a lower control cam (52).
4. On-load tap changer (1) according to any one of the preceding claims, wherein each switching segment (25) comprises two vacuum interrupters (33, 34), with each of a which a respective actuating lever (45) is associated, a plurality of movable contacts (29A) for a diverter contact (391) and a plurality of movable contacts (29S) for tap contacts (392) or selector contacts (84).
5. On-load tap changer (1) according to any one of claims 2 to 4, wherein the sector-shaped support (29) of the identical resistance arrangements (27), a switching segment (25) and a high-mass element (36) are arranged in the switching module (24) around the axis (A) of the switching tube (15) and corresponding actuating elements (50) are so mounted on the inner wall (20) of the oil tank (18) that the on-load tap changer is a load selector (1).
6. On-load tap changer (1) according to claim 5, wherein the switching tube (15) carries a mount (40) which mounts a switching segment (25), a resistance arrangement (27) and the high-mass element (36) radially about the axis (A) of the switching tube (15).
7. On-load tap changer (1) according to claim 5 or 6, wherein the load selector (1) has three switching modules (24) arranged at the switching tube (15) along the axis (A).
8. On-load tap changer (1) according to any one of claims 2 to 4, wherein
   three of the sector-shaped supports (29) of the identical resistance arrangements (27) are so arranged in the switching module (24) around the axis (A) of the switching tube (15) that these surround the switching tube (15), that three switching segments (25) are mounted around the switching tube (15) in the direction of the axis (A) of the switching tube (15) and at a spacing from the resistance arrangement (27) and that corresponding actuating elements (50) are so mounted on the inner wall (20) of the oil tank (18) that the on-load tap changer is a load changeover switch (1).
9. On-load tap changer (1) according to claim 8, wherein the switching tube (15) carries a first mounting device (81) for the identical resistance arrangements (27) so that these surround the switching tube (15) and wherein the switching tube (15) carries in axial direction a second mounting device (82) which mounts the three switching segments (25) around the switching tube (15).
10. On-load tap changer (1) according to claim 8 or 9, wherein the load changeover switch (1) comprises three switching segments (25) arranged at the switching tube (15) radially around the axis (A).
11. On-load tap changer (1) according to any one of the preceding claims, wherein each actuating lever (45) of the switching segment (25) carries a roller (43) which cooperates with the upper control cam (51) or the lower control cam (52) of the actuating elements (50).
12. On-load tap changer (1) according to any one of the preceding claims, wherein at least one diverter contact (391) and at least one tap contact (392) or selector contact (84) are each connected by way of a respective mounting element (31) at an inner surface (56) of each actuating element (50) and are mounted on an outer wall (16) of the oil tank (18) and wherein an electrical terminal element (68) of the respective diverter contact (391) or an electrical terminal element (39, 85, 86) of the respective tap contact (391) or respective selector contact (84) is led through a screening cap (30) to the outer wall (16) of the oil tank (18).
13. On-load tap changer (1) according to claim 12, wherein by virtue of the arrangement of at least the identical switching segments (25) and the identical resistance arrangements (27) the on-load tap changer (1) is a load selector and the diverter contact is constructed as a continuous diverter ring (391).
14. On-load tap changer (1) according to claim 12, wherein by virtue of the arrangement of at least the identical switching segments (25) and the identical resistance arrangements (27) the on-load tap changer (1) is a load changeover switch and the diverter contact (391) is a ring segment.
15. On-load tap changer (1) according to any one of the preceding claims, wherein a flywheel mass (35) is mounted on the switching tube (15).

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