ABB Relion 670 series - Setting parameters; Technical data; Zero sequence overcurrent protection LCZSPTOC (51 N)

13.8.8.5 Setting parameters
Table 477: LCNSPTOC (46) Group settings (basic)
Name Values (Range) Unit Step Default Description
Operation Disabled
Enabled
- - Disabled Operation Disabled/Enabled
IBase 1 - 99999 A 1 3000 Base setting for current in A
Pickup2 1 - 2500 %IB 1 100 Negative sequence over current start value in
% of IBase
tI2 0.000 - 60.000 s 0.001 0.000 Time delay to operate
13.8.8.6 Technical data
Table 478: LCNSPTOC (37_55)technical data
Function Range or value Accuracy
Operate value, negative
sequence overcurrent
(1 - 2500)% of IBase ± 1.0% of Ir at I < I
n
± 1.0% of I at I > I
n
Reset ratio, negative
sequence overcurrent
>95% -
Operate time, start 20 ms typically at 0 to 2xI
set
15 ms typically at 0 to 10xI
set
-
Reset time, start 25 ms typically at 2 to 0xI
set
-
Critical impulse time,
negative sequence
overcurrent
10 ms typically at 0 to 2xI
set
2 ms typically at 0 to 10xI
set
-
Impulse margin time,
negative sequence
overcurrent
10 ms typically -
Timer (0.000-60.000) s ± 0.5% ± 10 ms
Transient overreach, start
function
<5% at τ = 100 ms -
13.8.9 Zero sequence overcurrent protection LCZSPTOC (51N)
Function description
IEC 61850
identification
IEC 60617
identification
ANSI/IEEE C37.2
device number
Zero sequence overcurrent protection LCZSPTOC - 51N
Section 13 1MRK505222-UUS C
Scheme communication
850
Technical reference manual