ABB 1MRK002826-AG - Page 92

M13304-1 v15
Table 71. Two step overvoltage protection OV2PTOV
Function Range or value Accuracy
Operate voltage, step 1 and 2 (1.0-200.0)% of UBase ±0.5% of U
r
at U ≤ U
r
±0.5% of U at U > U
r
Absolute hysteresis (0.0–50.0)% of UBase ±0.5% of U
r
at U ≤ U
r
±0.5% of U at U > U
r
Inverse time characteristics for steps 1
and 2, see table 190
- See table 190
Definite time delay, low step (step 1) at
0 to 1.2 x U
set
(0.00 - 6000.00) s ±0.2% or ±45 ms whichever is greater
Definite time delay, high step (step 2) at
0 to 1.2 x U
set
(0.000-60.000) s ±0.2% or ±45 ms whichever is greater
Minimum operate time, Inverse
characteristics
(0.000-60.000) s ±0.2% or ±45 ms whichever is greater
Operate time, start at 0 to 2 x U
set
Min. = 15 ms
Max. = 30 ms
-
Reset time, start at 2 x U
set
to 0 Min. = 15 ms
Max. = 30 ms
-
Operate time, start at 0 to 1.2 x U
set
Min. = 20 ms
Max. = 35 ms
-
Reset time, start at 1.2 x U
set
to 0 Min. = 5 ms
Max. = 25 ms
-
Critical impulse time 10 ms typically at 0 to 2 x
U
set
-
Impulse margin time 15 ms typically -
Generator protection REG670
1MRK 502 074-BEN M
Version 2.2
92 Hitachi Power Grids
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