Improvements in or relating to insulation components for hvdc converter transformers

摘要

In the field of single phase HVDC converter transformers there is a need to reduce the creep stress arising on the surface of an insulation assembly within the transformer without adversely impacting on the manufacture of the transformer. An insulation component (50; 80), for a limb of a HVDC converter transformer, comprises a component body (52) which has first and second ends (54, 56). An inner surface, that in use faces the magnetic core (12) of a limb (14, 16) of a HVDC converter transformer, extends between the first and second ends (54, 56). An outer surface (58), which lies opposite the inner surface, also extends between the first and second ends (54, 56). The outer surface (58) has a surface profile (60; 82) which extends between the first and second ends (54, 56) and that includes at least one raised formation (64; 84).