International Electrotechnical Commission <br/><br/>
IEC : 62053 - 24 (Ed-1.0) -2016-11-(Amendment -1) ;Electricity metering equipmet (a.c.) -Particular requirements - part 24 : Static meters for reactive energy at fundamental frequency (classes 0,5 S,1 S and 1 

 - Geneva  International Electrotechnical Commission  2016 
 - 5+4 
<br/><br/> Print out taken from CD 
<br/><br/><label>Universal Decimal Class. No.: </label> /