Publikuar
It has the status of a horizontal standard in accordance with IEC Guide 108.
PUBLISHED
IEC 60050-721:1991 ED1
60.60
Standard published
30 jan 1992
PUBLISHED
IEC 60050-721:1991/AMD1:2016 ED1
PUBLISHED
IEC 60050-721:1991/AMD2:2017 ED1
PUBLISHED
IEC 60050-721:1991/AMD3:2018 ED1
PUBLISHED
IEC 60050-721:1991/AMD4:2019 ED1
PUBLISHED
IEC 60050-721:1991/AMD5:2021 ED1
ABANDON
IEC 60050-721 ED2