ABB ret650, Technical Manual

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IEC16000503-1-en.vsd
BFP Started L1
t
t2
AND
BFP Started L2
BFP Started L3
From other
phases
OR OR
AND
t
60 s
AND
a
b
a>b
IN
IN>
1 out of 4
AND
OR
1 out of 3
Current High L2
Current High L3
From other
phases
AND
Current High L1
OR
Contact Closed L1
OR
Backup Trip L1
200 ms
Backup Trip L2
OR
From other
phases Backup Trip L3
TRBU
OR
2 out of 4
BUTripMode
1
AND
OR
Current High L1
BFP Started L1
30 ms
Backup Time Out L1
AND
AND
AND
OR
OR
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> .
8.6.8 Technical data
Table 103: CCRBRF technical data
Function Range or value Accuracy
Operate phase
current
(5-200)% of
lBase
±
1.0% of I
r
at I
£
I
r
± 1.0% of I at I > I
r
Reset ratio, phase
current
> 95% -
Operate residual
current
(2-200)% of
lBase
±
1.0% of I
r
at I
£
I
r
± 1.0% of I at I > I
r
Reset ratio, residual
current
> 95% -
Phase current level
for blocking of
contact function
(5-200)% of
lBase
±
1.0% of I
r
at I
£
I
r
±
1.0% of I at I > I
r
Reset ratio > 95% -
Table continues on next page
Section 8
1MRK 504 135-UEN A
Current protection
184
Technical manual