ABB Relion 670 Series Product Manual page 68

Bay control REC670
Version 2.2
Impedance protection
Table 35. 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
68
M16043-1 v14
Range or value
UBase
(1–100)% of
IBase
(1–100)% of
(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 511 404-BEN N
Hitachi Power Grids