ABB REB670 Series, Applications Manual

Page: 191 / 476

breaker failure function for cases where a permanent START signal is given by mistake (e.g.
due to a fault in the station battery system). Note that any backup trip command will inhibit
running of
tStartTimeout timer.
30ms
OR START
Current Check
AND
t
t1
TRRET
TRBU
OR
30ms
OR
AND
t
t2 30ms
t
150ms
S
R
Q
AND
NOT
CB Position Check
IEC18001002-1-en.vsdx
IEC18001002 V1 EN-US
Figure 103: Simplified overall logic for LatchedStart
OR OR START
Current Check
CB Position Check
AND
t
t1
t
t1
t
t2
t
t2
TRRET
TRBU
OR
OR OR
AND
IEC18001003-1-en.vsdx
IEC18001003 V1 EN-US
Figure 104: Simplified overall logic for FollowStart
OR
START
Current Check
CB Position Check
AND
t
t1
t
t2
TRRET
TRBU
IEC18001004-1-en.vsdx
IEC18001004 V1 EN-US
Figure 105: Simplified overall logic for FollowStart&Mode
RetripMode: This setting defines how the retrip function shall operate. Refer to Table
34 for
more details.
1MRK 505 370-UEN D Section 7
Current protection
Busbar protection REB670 185
Application manual