ABB Relion 670 Series Technical Reference Manual page 858

Section 13
Scheme communication
13.8.9.5
Table 481: LCZSPTOC (51N) Group settings (basic)
Name Values (Range)
Operation Disabled
Enabled
IBase 1 - 99999
3I0 PU 1 - 2500
t3I0 0.000 - 60.000
13.8.9.6
13.8.10
13.8.10.1
852
Setting parameters
Unit Step
- -
A 1
%IB 1
s 0.001
Technical data
Table 482: LCZSPTOC (51N)technical data
Function
Operate value, zero
sequence overcurrent
Reset ratio, zero
sequence overcurrent
Operate time, start
Reset time, start
Critical impulse time, zero
sequence overcurrent
Impulse margin time,
zero sequence
overcurrent
Timer
Three phase overcurrent LCP3PTOC (51)
Function description
Three phase overcurrent
Introduction
Three phase overcurrent (LCP3PTOC, 51) is designed for overcurrent conditions.
Default
Disabled
3000
100
0.000
Range or value
(1-2500)% of IBase
>95%
20 ms typically at 0 to 2xI
set
15 ms typically at 0 to 10xI
set
30 ms typically at 2 to 0xI
set
10 ms typically at 0 to 2xI
set
2 ms typically at 0 to 10xI
set
15 ms typically
(0.000-60.000) s
IEC 61850
identification
LCP3PTOC
1MRK505222-UUS C
Description
Operation Disabled/Enabled
Base setting for current in A
Zero sequence over current start value in %
of IBase
Time delay to operate
Accuracy
± 1.0% of I at I<I
n
± 1.0% of I at I>I
-
-
-
-
-
± 0.5% ± 10 ms
IEC 60617 ANSI/IEEE C37.2
identification device number
- 51
Technical reference manual
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n