ABB Relion 670 series - Page 124

GUID-C4ACE306-2A54-483D-B247-A479D48CBF5F v5
Table 105. Three phase overcurrent LCP3PTOC
Function Range or value Accuracy
Operate value, overcurrent (5-2500)% of IBase ±1.0% of I
r
at I ≤ I
r
±1.0% of I at I > I
r
Reset ratio, overcurrent > 95% at (50-2500)% of
IBase
-
Start time at 0 to 2 x I
set
Min. = 10 ms
Max. = 25 ms
-
Reset time at 2 x I
set
to 0 Min. = 20 ms
Max. = 35 ms
-
Critical impulse time, overcurrent 3 ms typically at 0 to 2 x I
set
1 ms typically at 0 to 10 x I
set
-
Impulse margin time, overcurrent 10 ms typically -
Independent time delay to operate at 0 to
2 x I
set
(0.000-60.000) s ±0.2% or ±30 ms whichever is greater
GUID-CE2C6F0A-DF49-4AAF-80F0-9CDCBB08E755 v5
Table 106. Three phase undercurrent LCP3PTUC
Function Range or value Accuracy
Operate value, undercurrent (1.00-100.00)% of IBase ±1.0% of I
r
Reset ratio, undercurrent < 105% at (50.00-100.00)% of
IBase
-
Start time at 2 x I
set
to 0 Min. = 15 ms
Max. = 30 ms
-
Reset time at 0 to 2 x I
set
Min. = 10 ms
Max. = 25 ms
-
Critical impulse time, undercurrent 10 ms typically at 2 x I
set
to 0 -
Impulse margin time, undercurrent 10 ms typically -
Independent time delay to operate at 2 x I
set
to 0
(0.000-60.000) s ±0.2% or ±45 ms whichever is greater
Line differential protection RED670
1MRK 505 379-BEN N
Version 2.2
124 Hitachi Power Grids
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