M12353-1 v15
Table 64. Breaker failure protection CCRBRF
Function Range or value Accuracy
Operate phase current (5-200)% of
lBase
±1.0% of I
r
at I £ I
r
±1.0% of I at I > I
r
Reset ratio, phase current > 95% -
Operate residual current (2-200)% of
lBase
±1.0% of I
r
at I £ I
r
±1.0% of I at I > I
r
Reset ratio, residual current > 95% -
Phase current level for blocking of contact
function
(5-200)% of
lBase
±1.0% of I
r
at I £ I
r
±1.0% of I at I > I
r
Reset ratio > 95% -
Operate time for current detection 10 ms typically -
Reset time for current detection 10 ms maximum * -
Time delay for retrip at 0 to 2 x I
set
(0.000-60.000) s ±0.2% or ±15 ms whichever is greater
Time delay for backup trip at 0 to 2 x I
set
(0.000-60.000) s ±0.2% or ±15 ms whichever is greater
Time delay for backup trip at multi-phase start
at 0 to 2 x I
set
(0.000-60.000) s ±0.2% or ±20 ms whichever is greater
Additional time delay for a second backup trip
at 0 to 2 x I
set
(0.000-60.000) s ±0.2% or ±20 ms whichever is greater
Time delay for alarm for faulty circuit breaker (0.000-60.000) s ±0.2% or ±15 ms whichever is greater
Minimum trip pulse duration (0.010-60.000) s ±0.2% or ±5 ms whichever is greater
* Valid for product version 2.2.3 or later
M12350-1 v12
Table 65. Stub protection STBPTOC
Function Range or value Accuracy
Operating current (5-2500)% of
IBase
±1.0% of I
r
at I ≤ I
r
±1.0% of I at I > I
r
Reset ratio > 95% at (50-2500)% of
IBase
-
Independent time delay at 0 to 2 x I
set
(0.000-60.000) s
±0.2% or ±30 ms whichever is greater
Operate time, start at 0 to 2 x I
set
Min. = 10 ms
Max. = 20 ms
-
Reset time, start at 2 x I
set
to 0 Min. = 10 ms
Max. = 20 ms
-
Critical impulse time 10 ms typically at 0 to 2 x I
set
-
Impulse margin time 15 ms typically -
M13279-1 v10
Table 66. Pole discordance protection CCPDSC
Function Range or value Accuracy
Operate current (0–100)% of
IBase
±1.0% of I
r
Independent time delay between trip
condition and trip signal
(0.000-60.000) s ±0.2% or ± 30 ms whichever is greater
Line differential protection RED670
1MRK 505 379-BEN N
Hitachi Power Grids 101
© Copyright 2017 Hitachi Power Grids. All rights reserved
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