I.S. EN 60521:1995被替代
Class 0.5, 1 and 2 Alternating-current Watthour Meters
出版：National Standards Authority of Ireland
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.
Supersedes IEC 60043, IEC 60170 and IEC 60280.
(02/2002)
UNE EN 60521:1996 - Identical
IEC 60521 Ed. 2.0 - Identical
DIN EN 60521 (1995-07) - Identical
BS EN 60521:1995 - Identical
SN EN 60521:1995 - Identical
NF EN 60521:1995 - Identical
SS EN 60521:1995 - Identical
