ABB Relion 670 series - Technical Data

en07000022_ansi.vsd
PU_A
PU_B
PU_C
OR
PICKUP
BLKH_A
BLKH_B
BLKH_C
OR
BLKH
ANSI07000022 V1 EN-US
Figure 60: Generator differential logic diagram 3
en07000023_ansi.vsd
TRIPRES_A
TRIPRES_B
TRIPRES_C
OR
TRIPRES
TRIPUNRE_A
TRIPUNRE_B
TRIPUNRE_C
OR
TRIPUNRE
OR
TRIP
TRNSUNR
TRNSSENS
ANSI07000023 V1 EN-US
Figure 61: Generator differential logic diagram 4
6.3.8 Technical data
SEMOD175007-1 v1
SEMOD175004-2 v10
Table 70: GENPDIF (87G) technical data
Function Range or value Accuracy
Unrestrained differential current limit (1-50)p.u. of IBase ±1.0% of set value
Reset ratio > 95% -
Minimum pickup (0.05–1.00)p.u. of IBase ±1.0% of I
n
Negative sequence current level (0.02–0.20)p.u. of IBase ±1.0% of I
n
Trip time at 0 to 2 x IdMin
restrained function
Min. = 25 ms
Max. = 35 ms
-
Reset time at 2 x IdMin to 0
restrained function
Min. = 10 ms
Max. = 25 ms
-
Trip time at 0 to 5 x IdUnre
unrestrained function
Min. = 5 ms
Max. = 15 ms
-
Reset time at 5 x IdUnre to 0
unrestrained function
Min. = 15 ms
Max. = 30 ms
-
Critical impulse time, unrestrained
function
2 ms typically at 0 to 5 x IdUnre -
Table continues on next page
1MRK 502 066-UUS B Section 6
Differential protection
165
Technical manual