IEC 60521 Ed. 2.0被替代
Class 0.5, 1 and 2 alternating-current watthour meters
出版：International Electrotechnical Committee
专家解读视频
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 60043 (1960), 60170 (1964) and 60280 (1968).
GB/T 15283-1994 - Identical
HD 309.1:1977 - Similar
SS EN 60521:1995 - Identical
BS EN 60521:1995 - Identical
NEN 10521:1995 - Identical
SN EN 60521:1995 - Identical
SS 406 01 06:1980 - Similar
I.S. EN 60521:1995 - Identical
UNE 21310-2:1990 - Identical
UNE EN 60521:1996 - Identical
DIN EN 60521 (1995-07) - Identical
VDE 0418-12:1995 - Identical
