Hitachi Relion 670 Series Product Manual page 98

Line differential protection RED670
Version 2.2
Table 57. Automatic switch onto fault logic ZCVPSOF
Parameter
Operate voltage, detection of dead line
Operate current, detection of dead line
Time delay to operate for the switch
onto fault function
Time delay for UI detection
Delay time for activation of dead line
detection
Drop-off delay time of switch onto fault
function
98
M16043-1 v14
Range or value
(1–100)% of UBase
(1–100)% of IBase
(0.03-120.00) s
(0.000-60.000) s
(0.000-60.000) s
(0.000-60.000) s
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Accuracy
±0.5% of U
r
±1.0% of I
r
±0.2% or ±30 ms whichever is greater
±0.2% or ±30 ms whichever is greater
±0.2% or ±30 ms whichever is greater
±0.2% or ±30 ms whichever is greater
1MRK 505 379-BEN R
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