BRITISH STANDARDS INSTITUTION <br/><br/>
BS EN: 60255-6-1995: Electrical Relays, part 6: Measuring Relays and protection equipment. 

 - LONDON  BIS  1995 
 - 24 
<br/><br/><label>ISBN: </label>0-580-24142-4 
<br/><br/><label>Universal Decimal Class. No.: </label> /