Technical Data - ABB RET650 Technical Manual

Section 8
Current protection
8.6.8
184
BUTripMode
1 out of 3
2 out of 4
1
1 out of 4
BFP Started L1
IN
a
a>b
IN>
b
Current High L2
From other
Current High L3
phases
Current High L1
BFP Started L1
t
BFP Started L2
From other
phases
BFP Started L3
IEC16000503 V1 EN
Figure 82: Simplified logic scheme of the back-up trip function
Internal logical signals Current High L1, Current High L2, and Current High L3 have
logical value 1 when current in respective phase has magnitude larger than setting
parameter IP>.

Technical data

Table 103: CCRBRF technical data
Function Range or value
Operate phase (5-200)% of
current
Reset ratio, phase > 95%
current
Operate residual (2-200)% of
current
Reset ratio, residual > 95%
current
Phase current level (5-200)% of
for blocking of
contact function
Reset ratio > 95%
Table continues on next page
OR
AND
Current High L1
AND
Contact Closed L1
O R
AND
t2
t
AND
AND
O R OR
Backup Trip L2
From other
phases Backup Trip L3
AND
AND
OR
AND
lBase
lBase
lBase
1MRK 504 135-UEN A
OR
30 ms
AND
OR
OR
60 s
200 ms
OR
OR
Accuracy
± 1.0% of I at I £ I
r r
± 1.0% of I at I > I
r
-
± 1.0% of I at I £ I
r r
± 1.0% of I at I > I
r
-
± 1.0% of I at I £ I
r r
± 1.0% of I at I > I
r
-
Technical manual
Backup Time Out L1
Backup Trip L1
TRBU
IEC16000503-1-en.vsd