UNE-EN IEC 62271-215:2021 High-voltage switchgear and controlgear - Part 215: Phase comparator used with VDIS (Endorsed by Asociación Española de Normalización in October of 2021.)
2021UNE-EN IEC 62271-215:2021 High-voltage switchgear and controlgear - Part 215: Phase comparator used with VDIS (Endorsed by Asociación Española de Normalización in October of 2021.)