ABB Relion 670 Series Technical Reference Manual page 494

Section 7
Current protection
7.13.3
7.13.4
488
TEST
TEST-ACTIVE
BlockBRC = Yes
BRC--BLOCK
Unsymmetrical
Current Detection
PU_ub
IA<50%Pickup_PN
IB<50%Pickup_PN
IC<50%Pickup_PN
IEC07000123 V1 EN
Figure 246: Simplified logic diagram for Broken conductor check BRCPTOC (46)
Function block
BRCPTOC (46)
I3P* TRIP
BLOCK PICKUP
BLKTR
ANSI07000034-2-en.vsd
ANSI07000034 V2 EN
Figure 247: BRCPTOC (46) function block
Input and output signals
Table 247: BRCPTOC (46) Input signals
Name Type
I3P GROUP
SIGNAL
BLOCK BOOLEAN
BLKTR BOOLEAN
AND
Function Enable
OR
OR
Default Description
- Group signal for current input
0 Block of function
0 Blocks the operate output
1MRK505222-UUS C
BRC--START
BRC--TRIP
0-t
AND
0
en07000123.vsd
Technical reference manual