GUID-E5718F80-556D-4852-A8F2-90E0F578D763 v9
Table 62. 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 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
±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 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
1MRK 504 155-BEN F
Transformer protection RET670 2.1 IEC
ABB
85
Содержание Relion 670 series
Страница 1: ...RELION 670 SERIES Transformer protection RET670 Version 2 1 Product guide...
Страница 145: ...145...