SIRIUS 3RR2 current monitoring relays 
  8.4 Functions 
SIRIUS Innovations 
System Manual, 01/2011, A8E56203870002-03 
691 
Basic current monitoring relay  Standard current monitoring relay Functions/Parameters 
3RR2141-.A.30  3RR2142-.A.30  3RR2241-.F.30  3RR2242-.F.30 
Phase sequence 
monitoring 
(  = yes)  
-  -  Selectable  Selectable 
Residual current 
monitoring 
(I >>
 = yes)  
-  -  Selectable  Selectable 
Blocking current 
monitoring (n x I▲)  
-  -  2 to 5 x I
max
; 
OFF 
2 to 5 x I
max
; 
OFF 
Load current 
monitoring (I
s
/I
p
)  
Apparent 
current 
Apparent current  Apparent 
current/active 
current 
Apparent 
current/active 
current 
Cable break/phase 
failure detection (L )  
2-phase  2-phase  3-phase  3-phase