Transformatorer - Oljeisolerade distributionstransformatorer - Del 1: Allmänna fordringar och fordringar på transformatorer för högst 24 kV
Three-phase oil-immersed distribution transformers 50 Hz, from 50 to 2500 kVA, with highest voltage for equipment not exceeding 36 kV - Part 1: General requirements and requirements for transformers with highest voltage for equipment not exceeding 24 kV