SIRIUS 3RU2/3RB3 overload relays 
  5.3 Product combinations 
SIRIUS Innovations 
System Manual, 01/2011, A8E56203870002-03 
493 
5.3  Product combinations 
Since the products from the innovative SIRIUS modular system are matched to one another 
both electrically and mechanically, they can be combined quickly and easily. 
Reference 
 
More information ...  Can be found in the chapter titled ... 
About the possible combinations of standard 
products from the SIRIUS modular system 
System overview, under Device combinations 
(Page 70)