Draft Document - High-voltage switchgear and controlgear - Part 307: Guidance for the extension of validity of type tests of AC metal and solid-insulation enclosed switchgear and controlgear for rated voltages above 1 kV and up to and including 52 kV (IEC 17C/848/CD:2022); Text in German and English
Deutsches Institut Fur Normung E.V. (German National Standard) , 11/01/2023
