ABB Relion 670 Series Product Manual page 93

Generator protection REG670
Version 2.2
Table 72. Residual overvoltage protection, two steps ROV2PTOV
Function
Operate voltage, step 1 - step 2
Absolute hysteresis
Inverse time characteristics for low
and high step, see table 192
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
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
Critical impulse time
Impulse margin time
Table 73. Overexcitation protection OEXPVPH
Function
Operate value, start
Operate value, alarm
Operate value, high level
Curve type
Minimum time delay for inverse
function
Maximum time delay for inverse
function
Alarm time delay
Hitachi Power Grids
Range or value
(1.0-200.0)% of
(0.0–50.0)% of
-
(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
set
Max. = 25 ms
10 ms typically at 0 to 2 x U
15 ms typically
Range or value
UBase /f
(100–180)% of (
(50–120)% of start level
UBase /f
(100–200)% of (
IEEE or customer defined
×
(0.18 ) k
=
IEEE t :
- 2
( M 1)
EQUATION1319 V1 EN-US
where M = (E/f)/(Ur/fr)
(0.000–60.000) s
(0.00–9000.00) s
(0.00–9000.00)
© Copyright 2017 Hitachi Power Grids. All rights reserved
M13317-2 v15
Accuracy
UBase
± 0.5% of U
± 0.5% of U at U > U
UBase
± 0.5% of U
± 0.5% of U at U > U
See table 192
± 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
-
M13338-2 v11
Accuracy
) ±0.5% of U
rated
±0.5% of U
r
±0.5% of U at U > U
) ±0.5% of U
rated
±5.0 % or ±45 ms, whichever is greater
(Equation 2)
±1.0% or ±45 ms, whichever is greater
±1.0% or ±45 ms, whichever is greater
±1.0% or ±45 ms, whichever is greater
1MRK 502 074-BEN M
at U ≤ U
r r
r
at U ≤ U
r r
r
at U ≤ U
r
r
93