UNE-EN IEC 62040-1:2019/A1:2023 Uninterruptible power systems (UPS) - Part 1: Safety requirements (Endorsed by Asociación Española de Normalización in December of 2023.)
2023UNE-EN IEC 62040-1:2019/A1:2023 Uninterruptible power systems (UPS) - Part 1: Safety requirements (Endorsed by Asociación Española de Normalización in December of 2023.)
2021UNE-EN IEC 62040-1:2019/A11:2021 Uninterruptible power systems (UPS) - Part 1: Safety requirements (Endorsed by Asociación Española de Normalización in March of 2021.)
2019UNE-EN IEC 62040-1:2019/AC:2019-11 Uninterruptible power systems (UPS) - Part 1: Safety requirements (Endorsed by Asociación Española de Normalización in December of 2019.)
2019UNE-EN IEC 62040-1:2019 Uninterruptible power systems (UPS) - Part 1: Safety requirements (Endorsed by Asociación Española de Normalización in September of 2019.)