ABB RET670 - Diagnose IED Status; Read internal events; Find available functions

Table 56. 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
at I ≤ I
r
±1.0% of I at I > 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 to 0 x I
set
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 to 0 x I
set
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 ±5.0% 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 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 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 to 2 x I
set
(0.00-6000.00) s ±0.2% or ±35 ms whichever is
greater
Transformer protection RET670 2.0
1MRK 504 141-BEN C
Product version: 2.0
ABB 71