UNE-EN IEC 61757-4-3:2020 Fibre optic sensors - Part 4-3: Electric current measurement - Polarimetric method (Endorsed by Asociación Española de Normalización in October of 2020.)
2022UNE-EN IEC 61757-4-3:2020/AC:2022-07 Fibre optic sensors - Part 4-3: Electric current measurement - Polarimetric method (Endorsed by Asociación Española de Normalización in August of 2022.)
2020UNE-EN IEC 61757-4-3:2020 Fibre optic sensors - Part 4-3: Electric current measurement - Polarimetric method (Endorsed by Asociación Española de Normalización in October of 2020.)