Supplementary transformer winding

1. A transformer winding, comprising:

a main transformer winding; and

a supplementary transformer winding configured to be electrically connected in series with the main transformer winding, the supplementary transformer winding comprising:

a first winding module, a second winding module, and a third winding module, each of the winding modules having at least a first, a second and a third winding segment, and wherein each of the winding segments has a plurality of taps;

an on-load tap changer configured to be connected to the taps of the second winding module, and wherein the second winding module is configured to be electrically connected in series to at least one winding segment of the first winding module and the third winding module; and

at least one selector switch, wherein the at least one selector switch is connected to at least one of the plurality of taps of the first winding module and at least one of the plurality of taps the third winding module.

2. The transformer winding as claimed in claim 1 , comprising:

an outer tap and an output of the on-load tap changer, which are configured to connect the second winding module to the least one winding segment of the first winding module and the third winding module.

3. The transformer winding as claimed in claim 1 , comprising:

a plurality of winding segments which are connected electrically in series with the second winding module.

4. The transformer winding as claimed in claim 1 , comprising;

a plurality of winding segments connected electrically in series with the first winding module and the third winding module.

5. The transformer winding as claimed in claim 1 , comprising:

a mechanically detachable conductor and/or cable connection, which is configured to contact the respective taps to produce a series circuit with the first and/or third winding modules.

6. The transformer winding as claimed in claim 1 , wherein the first winding module and/or the third winding module is configured to be electrically connected in series with the second winding module.

7. The transformer winding as claimed in claim 1 , wherein a number of winding segments connected in series of the first winding module and a number of winding segments connected in series of the third winding module are equal.

8. The transformer winding as claimed in claim 1 , wherein a contact of the first winding module and/or the third winding module with respect to a respective connection to a connection of the second winding module is performed at a respective outer tap adjacent to the second winding module.

9. The transformer winding as claimed in claim 1 , wherein a number of the first and third winding segments connected electrically in series with the second winding module is fixed.

10. A supplementary transformer winding configured to be electrically connected in series with a main transformer winding, the supplementary transformer winding comprising:

a first winding module, a second winding module, and a third winding module, each of the winding modules having at least a first, a second and a third winding segment, and wherein each of the winding segments has a plurality of taps;

an on load tap changer configured to be connected to the taps of the second winding module, and wherein the second winding module is configured to be electrically connected in series to at least one winding segment of the first winding module and the third winding module; and

at least one selector switch, wherein the at least one selector switch is connected to at least one of the plurality of taps of the first winding module and at least one of the plurality of taps the third winding module.

11. The transformer as claimed in claim 10 , comprising:

an outer tap and an output of the on load tap changer, which are configured to connect the second winding module to the least one winding segment of the first winding module and the third winding module.

12. The transformer as claimed in claim 10 , comprising:

a plurality of winding segments which are connected electrically in series with the second winding module.

13. The transformer as claimed in claim 10 , comprising;

a plurality of winding segments connected electrically in series with the first winding module and the third winding module.

14. The transformer as claimed in claim 10 , comprising:

a mechanically detachable conductor and/or cable connection, which is configured to contact the respective taps to produce a series circuit with the first and/or third winding modules.

15. The transformer as claimed in claim 10 , wherein the first winding module and/or the third winding module is configured to be electrically connected in series with the second winding module.

16. The transformer as claimed in claim 10 , wherein a number of winding segments connected in series of the first winding module and a number of winding segments connected in series of the third winding module are equal.

17. The transformer as claimed in claim 10 , wherein a contact of the first winding module and/or the third winding module with respect to a respective connection to a connection of the second winding module is performed at a respective outer tap adjacent to the second winding module.

18. The transformer as claimed in claim 10 , wherein the on load tap changer is configured to be switched independently from the first and third winding modules.

19. The transformer as claimed in claim 10 , wherein at least one of the taps of the first winding module and/or the third winding module are connected electrically in series with the second winding module, and wherein a number of winding segments of the at least one of the taps of the first winding module and/or the third winding module connected in series to the second winding module is fixed.

20. The transformer as claimed in claim 10 , wherein a number of the first and third winding segments connected electrically in series with the second winding module is fixed.