Hitachi Relion 670 Series Product Manual page 110
Line differential protection
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Also See for Relion 670 Series:
- Applications manual (438 pages) ,
- Commissioning manual (284 pages) ,
- Product manual (121 pages)
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Line differential protection RED670
Version 2.2
Table 72. Overcurrent protection with binary release BRPTOC , continued
Function
Critical impulse time
Table 73. Voltage-restrained time overcurrent protection VRPVOC
Function
Start overcurrent
Reset ratio, overcurrent
Operate time, start overcurrent at 0 to 2 x I
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
Independent time delay to operate at 0 to 2 x
I
set
Inverse time characteristics,
see tables
215
and
217
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
0
Reset time start undervoltage at 0 to 2 x U
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
110
Range or value
DFT:
10 ms typically at 0 to 2 x I
Peak to peak:
5 ms typically at 0 to 2 x I
Peak:
1 ms typically at 0 to 2 x I
GUID-7EA9731A-8D56-4689-9072-D72D9CDFD795 v8
Range or value
(2.0 - 5000.0)% of IBase
> 95%
Min. = 15 ms
set
Max. = 30 ms
to 0
Min. = 15 ms
set
Max. = 30 ms
Min. = 5 ms
Max. = 20 ms
to 0
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%
to
Min. = 15 ms
set
Max. = 30 ms
Min. = 15 ms
set
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
-
set
set
set
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
215
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 505 379-BEN R
217
Hitachi Energy
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