ABB Relion 650 Series Product Manual page 65

Transformer protection RET650
Version 2.2
Table 46. Residual overvoltage protection, two steps ROV2PTOV
Function
Operate voltage, step 1
Operate voltage, step 2
Reset ratio
151
Inverse time characteristics for low and
high step, see table
Definite time setting, step 1
Definite time setting, step 2
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 for step 1 inverse
characteristic
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
(1–100)% of UBase
(0.0–50.0)% of UBase
> 98%
-
(0.00–6000.00) s
(0.000–60.000) s
(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 10 ms
typically at 0 to 1.2 x U
15 ms typically
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M13317-2 v16
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 151
± 0.5% ± 25 ms
± 0.5% ± 25 ms
± 0.2% or ± 45 ms whichever is greater
± 0.2% or ± 45 ms whichever is greater
± 0.2% ± 25 ms
-
-
-
-
-
set
-
1MRK 504 172-BEN G
r
r
r
r
65