SIRIUS 3RV2 motor starter protectors   
4.9 Accessories 
  SIRIUS Innovations 
440  System Manual, 01/2011, A8E56203870002-03 
4.9.12  8US busbar adapter 
4.9.12.1  Description 
8US 3-phase busbar adapter 
To save space when installing the motor starter protectors and to save time and money 
when implementing the infeed, busbar adapters are used to attach the motor starter 
protectors directly to busbar systems with center-to-center clearance of 60 mm. 
The busbar adapters for busbar systems with a center-to-center clearance of 60 mm are 
suitable for copper busbars in widths of 12 mm through 30 mm. The busbars can be 5 mm or 
10 mm thick.  
The motor starter protectors snap onto the adapter and are connected at the input side. This 
ready-to-use unit plugs directly onto the busbar systems, thereby taking care of mechanical 
fastening and electrical connection at the same time. 
Reference 
For more information about busbar adapters, see Catalog LV 1. 
4.9.12.2  Versions 
Busbar systems for 60 mm system 
For copper busbars according to DIN 46433: 
●  Width: 12 mm and 30 mm 
●  Thickness: 5 mm and 10 mm 
●  and for T and I special profiles 
 
Rated current  Connecting 
cable 
Adapter length  Adapter width  Rated voltage Order no.  Size 
A  AWG  mm  mm  V 
for motor starter protectors with screw terminals 
8US12 51-5DS10  S00  16  12  200  45  690 
8US12 51-5NT10  S0  32  10  260  45  690 
for motor starter protectors with spring-loaded terminals 
8US12 51-5DT11  S00  16  12  260  45  690 
8US12 51-5NT11  S0  32  10  260  45  690