9 /21 
 
2.2.1  Technical Standards 
 
EN 50470-1:    Electricity metering equipment (AC) -Part 1: General requirements, test and 
test conditions Metering equipment (class indexes A, B, and C); 
 
EN 50470-3:    Electricity metering equipment (AC) -Part 3: Particular requirement Static me-
ters for active energy (class indexes A, B, and C);  
 
EN 50022:   Low voltage switchgear and control gear for industrial use; mounting rails,  
    top hat rails, 35 mm wide, for snap-on mounting of equipment 
 
IEC 62053-21: Static meters for active energy (classes 1 and 2) 
IEC 62052-11: Electricity metering equipment (AC)-General requirements, tests and test con-
ditions –part 11: metering equipment