ABB REL650 series Technical Manual page 266

Section 7
Current protection
260
BFI_3P
BFI_A
OR
BLOCK
ANSI09000976 V3 EN
Figure 116: Simplified logic scheme of the CCRBRF (50BF) starting logic
Pickup_PH
FunctionMode
1
Current and Contact
I_A
BFP Started A
Pickup_BlKCont
52a_A
ANSI09000977 V2 EN
Figure 117: Simplified logic scheme of the CCRBRF (50BF), CB position evaluation
BFP Started A 0-t1 Retrip Time Out A
0
RetripMode
No CBPos Check
30 ms
1
CB Pos Check
CB Closed A
ANSI16000502 V1 EN
Figure 118: Simplified logic scheme of the retrip logic function
30 ms
AND
OR
Reset A
Retrip Time Out A
BackupTrip A
a
a>b
b
Current
OR
Contact
Time out A
OR
AND
a AND
a>b
OR
b
From other
phases
AND
OR
OR
AND
1MRK 506 335-UUS A
BFP Started A
S SR
150ms
Q
R
0
Time out A
AND
ANSI09000976-3-en.vsd
AND
OR
AND
Current High A
OR
AND
AND
Contact Closed A
AND
ANSI09000977-2-en.vsd
TRRET_C
TRRET_B
OR
200 ms
OR
ANSI16000502-1-en.vsd
Technical manual
Reset A
CB Closed A
TRRET