ABB Relion 670 series, Technical Reference Manual

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13.8.9.5 Setting parameters
Table 481: LCZSPTOC (51N) 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
3I0 PU 1 - 2500 %IB 1 100 Zero sequence over current start value in %
of IBase
t3I0 0.000 - 60.000 s 0.001 0.000 Time delay to operate
13.8.9.6 Technical data
Table 482: LCZSPTOC (51N)technical data
Function Range or value Accuracy
Operate value, zero
sequence overcurrent
(1-2500)% of IBase ± 1.0% of I
n
at I<I
n
± 1.0% of I at I>I
n
Reset ratio, zero
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 30 ms typically at 2 to 0xI
set
-
Critical impulse time, zero
sequence overcurrent
10 ms typically at 0 to 2xI
set
2 ms typically at 0 to 10xI
set
-
Impulse margin time,
zero sequence
overcurrent
15 ms typically -
Timer (0.000-60.000) s ± 0.5% ± 10 ms
13.8.10 Three phase overcurrent LCP3PTOC (51)
Function description IEC 61850
identification
IEC 60617
identification
ANSI/IEEE C37.2
device number
Three phase overcurrent LCP3PTOC - 51
13.8.10.1 Introduction
Three phase overcurrent (LCP3PTOC, 51) is designed for overcurrent conditions.
Section 13
1MRK505222-UUS C
Scheme communication
852
Technical reference manual