EVS-EN 50216-4:2015

This part of EN 50216 specifies basic accessories of transformers / reactors, such as  thermometer pockets, to be used for liquid immersed transformers,  earth terminals; to be used for liquid immersed and dry-type transformers,  draining plugs, to be used for liquid immersed distribution transformers,  filling openings, to be used for liquid immersed distribution transformers,  rollers, choice and distance to be used for liquid immersed and dry-type transformers. After agreement between purchaser and manufacturer, this part of EN 50216 may still be applicable either as a whole or in part to large power transformers or special transformers.