GUID-0BD8D3C9-620A-426C-BDB5-DAA0E4F8247F v5
Table 41. Additional security logic for differential protection LDRGFC
Function
Range or value
Accuracy
Operate current, zero sequence current
(1-100)% of lBase
±1.0% of I
r
Operate current, low current operation
(1-100)% of lBase
±1.0% of I
r
Operate voltage, phase to neutral
(1-100)% of UBase
±0.5% of U
r
Operate voltage, phase to phase
(1-100)% of UBase
±0.5% of U
r
Independent time delay, zero sequence current at 0 to 2 x I
set
(0.000-60.000) s
±0.2% or ±35 ms
whichever is greater
Independent time delay, low current operation at 2 x I
set
to 0
(0.000-60.000) s
±0.2% or ± 35 ms
whichever is greater
Independent time delay, low voltage operation at 2 x U
set
to 0
(0.000-60.000) s
±0.2% or ±35 ms
whichever is greater
Reset time delay for startup signal at 0 to 2 x U
set
(0.000-60.000) s
±0.2% or ±35 ms
whichever is greater
Line differential protection RED670
1MRK 505 379-BEN R
Version 2.2
Hitachi Energy
89
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Содержание Relion 670 Series
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