ABB RED650, Technical Manual, Page: 223 / 926

S
R
SR
Q
OR
AND
AND
30 ms
t
150 ms
START
STL1
OR
BackupTrip L1
BFP Started L1
Reset L1
BLOCK
Retrip Time Out L1
IEC09000976-2-en.vsd
Time out L1
IEC09000976 V2 EN-US
Figure 94: Simplified logic scheme of the CCRBRF starting logic
AND
AND
AND
AND
AND
OR
OR
OR
a
b
a>b
AND
a
b
a>b
I>BlkCont AND
Time out L1
BFP Started L1
Reset L1
CBCLDL1
Current High L1
Contact Closed L1
IEC09000977-2-en.vsd
FunctionMode
OR
OR
Current
Contact
Current and Contact
1
IP>
CB Closed L1
IL1
IEC09000977 V2 EN-US
Figure 95: Simplified logic scheme of the CCRBRF , CB position evaluation
t
t1
tPulse
AND
AND
OR
OR
OR
TRRETL3
TRRETL2
BFP Started L1
Retrip Time Out L1
CB Closed L1
TRRET
TRRETL1
CBFLT
CB Pos Check
No CBPos Check
OR
From other
phases
IEC09000978-4-en.vsd
RetripMode
1
30ms
IEC09000978 V4 EN-US
Figure 96: Simplified logic scheme of the retrip logic function
1MRK 505 394-UEN A
Section 8
Current protection
Line differential protection RED650 2.2 IEC 217
Technical manual