Revidiran
Applies only to newly manufactured induction type watt-hour meters of accuracy classes 0.5, 1 and 2, for the measurement of alternating current electrical active energy of a frequency in the range 45 Hz to 65 Hz and to their type tests only.
This publication supersedes IEC 43 (1960), 170 (1964) and 280 (1968).
POVUČEN
IEC 60280:1968 ED1
POVUČEN
IEC 60521:1976 ED1
99.60
Povlačenje stupilo na snagu
19. 11. 2016.
POVUČEN
IEC 60521:1976/AMD1:1980 ED1
POVUČEN
IEC 60521:1988 ED2