Electrical apparatus with synthetic fiber and binder reinforced cellulose insulation paper

1. An electrical apparatus comprising:

at least one conductor; and

an insulation paper surrounding at least part of the conductor,

wherein the insulation paper comprises a wood pulp fiber, between approximately 2 and 25 weight percent of a synthetic fiber, and a binder material.

2. The electrical apparatus of claim 1 , wherein the synthetic fiber comprises one or more of an aramid fiber, a syndiotactic polystyrene fiber, a polyphenylsulfone fiber, a polyphthalamide fiber, or a polyphenylene sulfide fiber.

3. The electrical apparatus of claim 1 , wherein the synthetic fiber has a denier of between approximately 1 and 15.

4. The electrical apparatus of claim 3 , wherein the synthetic fiber has a denier of between approximately 2 and 5.

5. The electrical apparatus of claim 1 , wherein the synthetic fiber has a length of between approximately 0.1 and 1.0 inches.

6. The electrical apparatus of claim 5 , wherein the synthetic fiber has a length of between approximately 0.25 and 0.75 inches.

7. The electrical apparatus of claim 1 , wherein the binder material comprises polyvinyl alcohol.

8. The electrical apparatus of claim 1 , wherein the binder material comprises polyvinyl butyral.

9. The electrical apparatus of claim 1 , wherein the binder material comprises acrylic resin.

10. The electrical apparatus of claim 1 , wherein the composition of the insulation paper comprises between approximately 5 and 20 weight percent synthetic fiber.

11. The electrical apparatus of claim 10 , wherein the composition of the insulation paper comprises between approximately 7 and 15 weight percent synthetic fiber.

12. The electrical apparatus of claim 1 , wherein the composition of the insulation paper further comprises between approximately 5 and 35 weight percent binder.

13. The electrical apparatus of claim 1 , wherein the composition of the insulation paper further comprises between approximately 10 and 30 weight percent binder.

14. The electrical apparatus of claim 1 , wherein the composition of the insulation paper further comprises between approximately 15 and 25 weight percent binder.

15. The electrical apparatus of claim 1 , wherein the composition of the insulation paper further comprises between approximately 40 and 93 weight percent wood pulp fiber.

16. The electrical apparatus of claim 1 , wherein the composition of the insulation paper further comprises between approximately 50 and 85 weight percent wood pulp fiber.

17. The electrical apparatus of claim 1 , wherein the composition of the insulation paper further comprises between approximately 60 and 78 weight percent wood pulp fiber.

18. The electrical apparatus of claim 1 , wherein the composition of the insulation paper comprises:

approximately 10 weight percent aramid fiber;

approximately 20 weight percent polyvinyl alcohol; and

approximately 70 weight percent wood pulp fiber.

19. The electrical apparatus of claim 1 , wherein the insulation paper further comprises at least one layer of a thermal stabilizing chemical applied to a surface of the paper.

20. The electrical apparatus of claim 19 , wherein the thermal stabilizing chemical comprises dicyandiamide.

21. The electrical apparatus of claim 1 , wherein the conductor comprises a winding, the winding is insulated by insulation paper, the winding and the insulation paper are installed in an enclosure, and a dielectric fluid in the enclosure surrounds the winding and the insulation paper.

22. The electrical apparatus of claim 21 , wherein the winding comprises a component of a transformer.

23. The electrical apparatus of claim 22 , wherein the transformer comprises an autotransformer.

24. The electrical apparatus of claim 23 , wherein the autotransformer comprises a component of a voltage regulator.

25. The electrical apparatus of claim 21 , wherein the winding comprises a component of an autotransformer.

26. The electrical apparatus of claim 21 , wherein the winding comprises a component of a reactor.

27. The electrical apparatus of claim 22 , wherein the transformer comprises a component of a voltage regulator.

28. The electrical apparatus of claim 21 , wherein the dielectric fluid comprises a mineral oil.

29. The electrical apparatus of claim 21 , wherein the dielectric fluid comprises silicone oil.

30. The electrical apparatus of claim 21 , wherein the dielectric fluid comprises an ester oil.

31. The electrical apparatus of claim 21 , wherein the dielectric fluid comprises a hydrocarbon fluid.

32. The electrical apparatus of claim 1 , wherein the insulation paper comprises pressboard.

33. The electrical apparatus of claim 1 , wherein the insulation paper comprises crepe paper.

34. An electrical apparatus comprising:

at least one conductor; and

an insulation paper surrounding at least part of the conductor,

wherein the insulation paper comprises a wood pulp fiber, a binder material and a synthetic fiber comprising at least one of an aramid fiber, a syndiotactic polystyrene fiber, a polyphenylsulfone fiber, a polyphthalamide fiber, and a polyphenylene sulfide fiber.

35. The electrical apparatus of claim 34 , wherein the composition of the insulation paper comprises between approximately 2 and 25 weight percent synthetic fiber.

36. The electrical apparatus of claim 34 , wherein the composition of the insulation paper comprises between approximately 5 and 20 weight percent synthetic fiber.

37. The electrical apparatus of claim 34 , wherein the composition of the paper comprises between approximately 7 and 15 weight percent synthetic fiber.

38. An electrical apparatus comprising:

at least one conductor; and

an insulation paper surrounding at least part of the conductor,

wherein the insulation paper comprises a wood pulp fiber, aramid fiber, and a binder material.