ABB Relion 670 Series Product Manual page 77

Busbar protection REB670
Version 2.2
Table 52. Two step overvoltage protection OV2PTOV
Function
Operate voltage, step 1 and 2
Absolute hysteresis
Inverse time characteristics for steps 1 and
2, see table 171
Definite time delay, low step (step 1) at 0 to
1.2 x U
set
Definite time delay, high step (step 2) at 0
to 1.2 x U
set
Minimum operate time, Inverse
characteristics
Operate time, start at 0 to 2 x U
Reset time, start at 2 x U
set
Operate time, start at 0 to 1.2 x U
Reset time, start at 1.2 x U
set
Critical impulse time
Impulse margin time
Hitachi Power Grids
Range or value
(1.0-200.0)% of UBase
(0.0–50.0)% of UBase
-
(0.00 - 6000.00) s
(0.000-60.000) s
(0.000-60.000) s
Min. = 15 ms
set
Max. = 30 ms
to 0 Min. = 15 ms
Max. = 30 ms
Min. = 20 ms
set
Max. = 35 ms
to 0 Min. = 5 ms
Max. = 25 ms
10 ms typically at 0 to 2 x U
15 ms typically
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M13304-1 v15
Accuracy
±0.5% of U at U ≤ U
r
±0.5% of U at U > U
±0.5% of U at U ≤ U
r
±0.5% of U at U > U
See table 171
±0.2% or ±45 ms whichever is greater
±0.2% or ±45 ms whichever is greater
±0.2% or ±45 ms whichever is greater
-
-
-
-
-
set
-
1MRK 505 373-BEN P
r
r
r
r
77