NF C52-216-3*NF EN 50216-3:2002 Power transformer and reactor fittings - Part 3 : protective relay for hermetically sealed liquid-immersed transformers and reactors without gaseous cushion
2002NF C52-216-3*NF EN 50216-3:2002 Power transformer and reactor fittings - Part 3 : protective relay for hermetically sealed liquid-immersed transformers and reactors without gaseous cushion