ABB 1MRK002826-AG - Page 93

M13317-2 v15
Table 72. Residual overvoltage protection, two steps ROV2PTOV
Function Range or value Accuracy
Operate voltage, step 1 - step 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 low
and high step, see table 192
- See table 192
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 (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 -
M13338-2 v11
Table 73. Overexcitation protection OEXPVPH
Function Range or value Accuracy
Operate value, start (100–180)% of ( UBase /f
rated
) ±0.5% of U
Operate value, alarm (50–120)% of start level ±0.5% of U
r
at U ≤ U
r
±0.5% of U at U > U
r
Operate value, high level (100–200)% of ( UBase /f
rated
) ±0.5% of U
Curve type IEEE or customer defined
2
(0.18 )
:
( 1)
k
IEEE t
M
×
=
-
EQUATION1319 V1 EN-US (Equation 2)
where M = (E/f)/(Ur/fr)
±5.0 % or ±45 ms, whichever is greater
Minimum time delay for inverse
function
(0.000–60.000) s ±1.0% or ±45 ms, whichever is greater
Maximum time delay for inverse
function
(0.00–9000.00) s ±1.0% or ±45 ms, whichever is greater
Alarm time delay (0.00–9000.00) ±1.0% or ±45 ms, whichever is greater
Generator protection REG670
1MRK 502 074-BEN M
Version 2.2
Hitachi Power Grids 93
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