ABB Relion 670 Series Product Manual page 67

Busbar protection REB670
Version 2.2
Table 40. Busbar differential protection , continued
Function
Independent time delay for slow open
CT alarm at 2 x OCTOperLev to 0
Independent time delay to force bay
current to zero via binary signal
Independent time delay to invert bay
current via binary signal
Minimum duration of bay trip signals
"tTripPulse"
Hitachi Power Grids
Range or value
(1.00-600.00) s
(0.000-60.000) s
(0.000-60.000) s
(0.025–60.000) s
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Accuracy
± 0.2% or ± 25 ms whichever is greater
± 0.2% or ± 15 ms whichever is greater
± 0.2% or ± 15 ms whichever is greater
± 0.2% or ± 15 ms whichever is greater
1MRK 505 373-BEN P
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