ABB Relion 670 Series Product Manual page 89

Generator protection REG670
Version 2.2
Table 68. Voltage-restrained time overcurrent protection VRPVOC
Function
Start overcurrent
Reset ratio, overcurrent
Operate time, start overcurrent at 0 to 2 x
I
set
Reset time, start overcurrent at 2 x I
Operate time, start overcurrent at 0 to 10
x I
set
Reset time, start overcurrent at 10 x I
0
Independent time delay to operate at 0 to
2 x I
set
Inverse time characteristics,
see tables 182 and 183
Minimum operate time for inverse time
characteristics
High voltage limit, voltage dependent
operation
Start undervoltage
Reset ratio, undervoltage
Operate time start undervoltage at 2 x U
to 0
Reset time start undervoltage at 0 to 2 x
U
set
Independent time delay to operate,
undervoltage at 2 x U to 0
set
Internal low voltage blocking
Overcurrent:
Critical impulse time
Impulse margin time
Undervoltage:
Critical impulse time
Impulse margin time
Hitachi Power Grids
GUID-7EA9731A-8D56-4689-9072-D72D9CDFD795 v8
Range or value
(2.0 - 5000.0)% of IBase
> 95%
Min. = 15 ms
Max. = 30 ms
to 0 Min. = 15 ms
set
Max. = 30 ms
Min. = 5 ms
Max. = 20 ms
to Min. = 20 ms
set
Max. = 35 ms
(0.00 - 6000.00) s
13 curve types
(0.00 - 60.00) s
(30.0 - 100.0)% of UBase
(2.0 - 100.0)% of UBase
< 105%
Min. = 15 ms
set
Max. = 30 ms
Min. = 15 ms
Max. = 30 ms
(0.00 - 6000.00) s
(0.0 - 5.0)% of UBase
10 ms typically at 0 to 2 x I
15 ms typically
10ms typically at 2 x U
15 ms typically
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Accuracy
±1.0% of I at I ≤ I
r r
±1.0% of I at I > I
r
-
-
-
-
-
±0.2% or ±35 ms whichever is greater
See tables 182 and
±0.2% or ±35 ms whichever is greater
±1.0% of U
r
±0.5% of U
r
-
-
-
±0.2% or ±35 ms whichever is greater
±0.25% of U
r
-
set
-
to 0
set
1MRK 502 074-BEN M
183
89