SN EN 60521:1995现行
Class 0,5, 1 And 2 Alternating-current Watt Hour Meters
出版：Swiss Standards
专家解读视频
Applies to newly manufactured induction-type watthour 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. Applies to the assembly of meters and accessories, including current transformers, when enclosed in the metercase. Does not apply to any kind of measuring device.
DIN EN 60521 (1995-07) - Identical
BS EN 60521:1995 - Identical
SS EN 60521:1995 - Identical
UNE EN 60521:1996 - Identical
I.S. EN 60521:1995 - Identical
IEC 60521 Ed. 2.0 - Identical
NF EN 60521:1995 - Identical
