ABB REB650 - Technical Data

AND
AND
AND
AND
AND
OR
OR
OR
a
b
a>b
AND
a
b
a>b
AND
Time out A
BFP Started A
Reset A
52a_A
I_A
Current High A
Contact Closed A
ANSI09000977-1-en.vsd
FunctionMode
OR
OR
Current
Contact
Current and Contact
1
CB Closed A
Pickup_PH
Pickup_BlkCont
ANSI09000977 V1 EN
Figure 44: Simplified logic scheme of the CCRBRF (50BF), CB position evaluation
200 ms
AND
AND
OR
OR
OR
TRRET_C
TRRET_B
BFP Started A
Retrip Time Out A
CB Closed A
TRRET
TRRET_A
52FAIL
CB Pos Check
No CBPos Check
AND
OR
From other
phases
ANSI09000978-2-en.vsd
RetripMode
1
0
0-t1
ANSI09000978 V2 EN
Figure 45: Simplified logic scheme of the retrip logic function
Internal logical signals PU_A, PU_B, PU_C have logical value 1 when current in
respective phase has magnitude larger than setting parameter Pickup_PH.
7.4.8 Technical data
Table 52: CCRBRF (50BF) technical data
Function
Range or value Accuracy
Operate phase current (5-200)% of lBase ± 1.0% of I
n
at I £ I
n
± 1.0% of I at I > I
n
Reset ratio, phase current > 95% -
Operate residual current (2-200)% of lBase ± 1.0% of I
n
at I £ I
n
± 1.0% of I at I > I
n
Reset ratio, residual
current
> 95% -
Table continues on next page
1MRK 505 277-UUS C Section 7
Current protection
111
Technical Manual