SIRIUS 3RU2/3RB3 overload relays 
  5.9 Accessories 
SIRIUS Innovations 
System Manual, 01/2011, A8E56203870002-03 
523 
5.9  Accessories 
5.9.1  Accessories 
For maximum flexibility, accessories can be added to the overload relays as required, easily, 
and without the need for tools. 
 
Accessories  3RU21  3RB30  3RB31 
Terminal support for stand-alone assembly  ✓  ✓  ✓ 
Release slide (mechanical remote RESET), compatible 
for use with all sizes 
✓  ✓  ✓ 
Release slide (mechanical remote RESET), compatible 
for use with all sizes 
✓  ✓  ✓ 
Electrical remote RESET module in three voltage 
variants, compatible for use with all sizes 
✓  --  ✓ 
integrated in 
device 
Terminal cover for ring cable lug connections, 
compatible for use with all sizes 
✓  --  -- 
Sealable cover  ✓  ✓  ✓