International Electrotechnical Commission <br/><br/>
IEC : 62873-1-2017 (Ed. 1.0) ; Residual current operated circuit -breakers for household and similar use- part 1: outline of blocks & modules for residual current devices standards 

 - Geneva  International Electrotechnical Commission  2017 
 - 29+4 
<br/><br/><label>Universal Decimal Class. No.: </label> /