ABB REL670 Product Manual page 63

Line distance protection REL670 2.2
Product version: 2.2
Differential protection
Table 31. High impedance differential protection, single phase HZPDIF
Function
Operate voltage
Reset ratio
Maximum continuous power
Operate time at 0 to 10 x U
d
Reset time at 10 x U to 0
d
Critical impulse time
Operate time at 0 to 2 x U
d
Reset time at 2 x U to 0
d
Critical impulse time
Table 32. Additional security logic for differential protection LDRGFC
Function
Operate current, zero sequence current
Operate current, low current operation
Operate voltage, phase to neutral
Operate voltage, phase to phase
Independent time delay, zero sequence current at 0 to 2 x I
Independent time delay, low current operation at 2 x I
Independent time delay, low voltage operation at 2 x U
Reset time delay for startup signal at 0 to 2 x U
ABB
Range or value
(10-900) V
I=U/R
>95% at (30-900) V
2
U>Trip /SeriesResistor ≤200 W
Min. = 5 ms
Max. = 15 ms
Min. = 75 ms
Max. = 95 ms
2 ms typically at 0 to 10 x U
d
Min. = 25 ms
Max. = 35 ms
Min. = 50 ms
Max. = 70 ms
15 ms typically at 0 to 2 x U
d
set
to 0
set
to 0
set
set
Accuracy
±1.0% of I
r
±1.0% of I at I > I
-
-
-
-
Range or value
(1-100)% of lBase
(1-100)% of lBase
(1-100)% of UBase
(1-100)% of UBase
(0.000-60.000) s
(0.000-60.000) s
(0.000-60.000) s
(0.000-60.000) s
1MRK 506 372-BEN -
at I ≤ I
r
r
Accuracy
±1.0% of I
r
±1.0% of I
r
±0.5% of U
r
±0.5% of U
r
±0.2% or ±40 ms
whichever is greater
±0.2% or ± 40 ms
whichever is greater
±0.2% or ±40 ms
whichever is greater
±0.2% or ±40 ms
whichever is greater
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