Hitachi Relion 670 Series Product Manual page 132

Line differential protection RED670
Version 2.2
Table 106. 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 x I to 0
set
Operate time, start at 0 to 10 x I
Reset time, start at 10 x I to 0
set
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 107. 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 x I to 0
set
Operate time, start at 0 to 10 x I
Reset time, start at 10 x I to 0
set
Critical impulse time, zero sequence
overcurrent
Impulse margin time, zero sequence
overcurrent
Independent time delay at 0 to 2 x I
132
GUID-0E964441-43DE-43B6-B454-485FBBF66B5C v5
Range or value
(3 - 2500)% of IBase
>95% at (50–2500)% of IBase
Min. = 15 ms
set
Max. = 25 ms
Min. = 15 ms
Max. = 25 ms
Min. = 10 ms
set
Max. = 20 ms
Min. = 20 ms
Max. = 35 ms
10 ms typically at 0 to 2 x I
2 ms typically at 0 to 10 x I
15 ms typically
(0.000-60.000) s
set
<10% at τ = 100 ms
GUID-9F739808-04CA-4988-ABBC-1A444297FDB5 v5
Range or value
(3-2500)% of IBase
>95% at (50–2500)% of IBase
Min. = 15 ms
set
Max. = 30 ms
Min. = 15 ms
Max. = 30 ms
Min. = 10 ms
set
Max. = 20 ms
Min. = 20 ms
Max. = 35 ms
10 ms typically at 0 to 2 x I
2 ms typically at 0 to 10 x I
15 ms typically
(0.000-60.000) s
set
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Accuracy
±1.0% of Ir at I ≤ I
r
±1.0% of I at I > I
r
-
-
-
-
-
-
set
set
-
±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
-
-
-
-
-
-
set
set
-
±0.2% or ±35 ms whichever is greater
1MRK 505 379-BEN R
Hitachi Energy