SIRIUS 3RU2/3RB3 overload relays 
  5.9 Accessories 
SIRIUS Innovations 
System Manual, 01/2011, A8E56203870002-03 
535 
5.9.7  Covers for ring cable lug connections 
5.9.7.1  Description 
Function 
Covers must be fitted to thermal overload relays with ring cable lug connection system to 
achieve finger-safety according to IEC 61140. Both line-side and output-side covers are 
available.  
Additional covers are not required for devices with spring-loaded and screw-type connection 
systems. 
 
58%-
57($
58%-
 
58%-
57($
59$$
 
Size S00, 3RU2116  Size S0, 3RU2126