Technical Data - ABB REG650 Technical Manual

Section 8
Current protection
8.5.8
218
Pickup_PH
FunctionMode
1
Current and Contact
I_A
Pickup_BlkCont
52a_A
ANSI09000977 V1 EN
Figure 99: Simplified logic scheme of the CCRBRF (50BF), CB position evaluation
BFP Started A Retrip Time Out A
0-t1
0
RetripMode
No CBPos Check
1
CB Pos Check
CB Closed A
52FAIL
ANSI09000978 V2 EN
Figure 100: 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.

Technical data

Table 97: CCRBRF (50BF) technical data
Function
Operate phase current
Reset ratio, phase current
Operate residual current
Reset ratio, residual
current
Table continues on next page
a
a>b
b
Current
OR
Contact
OR
AND
BFP Started A
a AND
a>b
OR
b
From other
phases
AND
OR
OR
AND
Range or value
lBase
(5-200)% of
> 95%
lBase
(2-200)% of
> 95%
1MRK 502 043-UUS B
AND Reset A
OR
Time out A
AND
Current High A
OR
AND
AND
Contact Closed A
AND
ANSI09000977-1-en.vsd
TRRET_C
TRRET_B
OR
200 ms
OR
AND
ANSI09000978-2-en.vsd
Accuracy
± 1.0% of I at I £ I
n
± 1.0% of I at I > I
-
± 1.0% of I at I £ I
n
± 1.0% of I at I > I
-
CB Closed A
TRRET
TRRET_A
n
n
n
n
Technical Manual