ABB Relion 650 Series Technical Manual page 215

1MRK 506 326-UUS B
Internal logical signal PU_N has logical value 1 when neutral current has magnitude larger than
setting parameter
BLOCK
PU_A
PICKUP
BFI_A
52a_A
BLOCK
PU_B
PICKUP
BFI_B
52a_B
BLOCK
PU_C
PICKUP
BFI_B
52a_C
BLOCK
PU_N
PICKUP
ANSI10000222 V1 EN-US
Figure 109: Simplified logic scheme of the back-up trip function
6.11.8 Technical data
Table 125: CSPRBRF (50BF) technical data
Function
Operate phase current
Reset ratio, phase current
Operate residual current
Reset ratio, residual current
Table continues on next page
Line distance protection REL650
Technical manual
Pickup_N .
Current
AND
Current &
Contact
AND AND
OR
OR
AND AND
Contact
Current
AND
Current &
Contact
AND AND
OR
OR
AND AND
Contact
Current
AND
Current &
Contact
AND AND
OR
OR
AND AND
Contact
Current
AND
AND
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1 out of 3
1 of 3
OR
1 out of 4
1 of 4
OR
AND
AND
AND
AND
AND
AND
OR 2 of 4
2 out of 4
Range or value
lBase
(5-200)% of
> 95%
lBase
(2-200)% of
> 95%
tp
t2
TRBU
OR t
ANSI10000222-1-en.vsd
GUID-ED3A9E92-0344-452C-A696-40817F577224 v1
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
-
Section 6
Current protection
n
n
n
n
209