Reducing ageing of an insulation material of a winding, in particular of an oil-impregnated high-voltage device

An assembly, comprising:

• a housing filled with a liquid coolant during operation;
• a cooling circuit for the coolant;
• a cooling element or radiator disposed outside said housing;
• said cooling circuit including a pipeline connecting said housing to said cooling element or radiator for supplying said cooling element or radiator with heated coolant;
• at least one winding disposed in said housing and disposed within the liquid coolant during operation, said at least one winding including at least one electrical conductor;
• a cellulosic insulation material at least partly surrounding at least one of said at least one winding or said electrical conductor of said at least one winding, for insulation purposes;
• at least one composition in addition to said cellulosic insulation material at least partly surrounding at least one of said at least one winding or said electrical conductor of said at least one winding for insulation purposes;
• said at least one composition disposed in at least one of said housing or said cooling circuit;
• said at least one composition containing chemical compounds for reducing aging of said cellulosic insulation material;
• said at least one composition being mounted at a position within said housing containing a region of the coolant being hotter than other regions of the coolant during operation;
• and
• said at least one composition disposed in said pipeline.