ABB Relion 670 Series Product Manual page 88

Line differential protection RED670 2.0
Product version: 2.0
Table 84. Negative sequence overcurrent protection LCNSPTOC
Function
Operate value, negative sequence overcurrent
Reset ratio, negative sequence overcurrent
Operate time, start at 0 to 2 x I
Reset time, start at 2 to 0 x I
set
Operate time, start at 0 to 10 x I
Reset time, start at 10 to 0 x I
Critical impulse time, negative sequence overcurrent
Impulse margin time, negative sequence overcurrent
Independent time delay at 0 to 2 x I
Transient overreach, start function
Table 85. Zero sequence overcurrent protection LCZSPTOC
Function
Operate value, zero sequence overcurrent
Reset ratio, zero sequence overcurrent
Operate time, start at 0 to 2 x I
Reset time, start at 2 to 0 x I
set
Operate time, start at 0 to 10 x I
Reset time, start at 10 to 0 x I
Critical impulse time, zero sequence overcurrent
Impulse margin time, zero sequence overcurrent
Independent time delay at 0 to 2 x I
88
set
set
set
set
set
set
set
set
Range or value
(3 - 2500)% of IBase
>95% at (50–2500)% of IBase
Min. = 15 ms
Max. = 25 ms
Min. = 15 ms
Max. = 25 ms
Min. = 10 ms
Max. = 20 ms
Min. = 20 ms
Max. = 35 ms
10 ms typically at 0 to 2 x I
set
2 ms typically at 0 to 10 x I
set
15 ms typically
(0.000-60.000) s
<5% at τ = 100 ms
Range or value
(3-2500)% of IBase
>95% at (50–2500)% of IBase
Min. = 15 ms
Max. = 30 ms
Min. = 15 ms
Max. = 30 ms
Min. = 10 ms
Max. = 20 ms
Min. = 20 ms
Max. = 35 ms
10 ms typically at 0 to 2 x I
set
2 ms typically at 0 to 10 x I
set
15 ms typically
(0.000-60.000) s
1MRK505310-BEN C
Accuracy
±1.0% of Ir at I ≤ I
r
±1.0% of I at I > I
r
-
-
-
-
-
-
-
±0.2% or ±35 ms, whichever is
greater
-
Accuracy
±1.0% of I at I≤I
r r
±1.0% of I at I>I
r
-
-
-
-
-
-
-
±0.2% or ±35 ms whichever is
greater
ABB