ABB 1MRK002826-AG - Page 86

GUID-E5718F80-556D-4852-A8F2-90E0F578D763 v10
Table 64. Negative sequence time overcurrent protection for machines NS2PTOC
Function Range or value Accuracy
Operate current, step 1 - 2 (3-500)% of IBase ±1.0% of I
r
Reset ratio >95% -
Operate time, start at 0 to 2 x I
set
Min. = 15 ms
Max. = 30 ms
-
Reset time, start at 2 x I
set
to 0 Min. = 15 ms
Max. = 30 ms
-
Operate time, start at 0 to 10 x I
set
Min. = 5 ms
Max. = 20 ms
-
Reset time, start at 10 x I
set
to 0 Min. = 20 ms
Max. = 35 ms
-
Time characteristics Definite or Inverse -
Inverse time characteristic, step 1 -
2
2
2
I t K=
K=1.0-99.0 ±2.0% or ±40 ms whichever is greater
Reset time, inverse characteristic,
step 1 - 2
2
2
I t K=
Reset Multiplier = 0.01-20.00 ±10.0% or ±40 ms whichever is greater
Minimum operate time for inverse
time characteristic, step 1 - 2
(0.000-60.000) s ±0.2% or ±35 ms whichever is greater
Maximum trip delay at 0.5 x I
set
to
2 x I
set
, step 1 - 2
(0.00-6000.00) s ±0.2% or ±35 ms whichever is greater
Independent time delay at 0.5 x I
set
to 2 x I
set
, step 1 - 2
(0.00-6000.00) s ±0.2% or ±35 ms whichever is greater
Independent time delay for Alarm
at 0.5 x I
set
to 2 x I
set
(0.00-6000.00) s ±0.2% or ±35 ms whichever is greater
Generator protection REG670
1MRK 502 074-BEN M
Version 2.2
86 Hitachi Power Grids
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