Hitachi Relion 670 Series Product Manual page 133

Line differential protection RED670
Version 2.2
Table 108. Three phase overcurrent LCP3PTOC
Function
Operate value, overcurrent
Reset ratio, overcurrent
Start time at 0 to 2 x I
set
Reset time at 2 x I to 0
set
Critical impulse time, overcurrent
Impulse margin time, overcurrent
Independent time delay to operate at 0 to 2 x
I
set
Table 109. Three phase undercurrent LCP3PTUC
Function
Operate value, undercurrent
Reset ratio, undercurrent
Start time at 2 x I to 0
set
Reset time at 0 to 2 x I
set
Critical impulse time, undercurrent
Impulse margin time, undercurrent
Independent time delay to operate at 2 x I
0
Hitachi Energy
GUID-C4ACE306-2A54-483D-B247-A479D48CBF5F v5
Range or value
(5-2500)% of IBase
> 95% at (50-2500)% of IBase
Min. = 10 ms
Max. = 25 ms
Min. = 20 ms
Max. = 35 ms
3 ms typically at 0 to 2 x I
1 ms typically at 0 to 10 x I
10 ms typically
(0.000-60.000) s
GUID-CE2C6F0A-DF49-4AAF-80F0-9CDCBB08E755 v5
Range or value
(1.00-100.00)% of IBase
< 105% at (50.00-100.00)% of
IBase
Min. = 15 ms
Max. = 30 ms
Min. = 10 ms
Max. = 25 ms
10 ms typically at 2 x I
10 ms typically
to (0.000-60.000) s
set
© 2017 - 2022 Hitachi Energy. All rights reserved
Accuracy
±1.0% of I at I ≤ I
r r
±1.0% of I at I > I
r
-
-
-
-
set
set
-
±0.2% or ±30 ms whichever is greater
Accuracy
±1.0% of I
r
-
-
-
to 0 -
set
-
±0.2% or ±45 ms whichever is greater
1MRK 505 379-BEN R
133