ABB RELION RED670 Series Product Manual page 84

Line differential protection RED670 2.2
Product version: 2.2
Table 53. Directional phase overcurrent protection, four steps OC4PTOC
Function
Operate current, step 1-4
Reset ratio
Minimum operate current, step 1-4
Relay characteristic angle (RCA)
Relay operating angle (ROA)
Second harmonic blocking
Independent time delay at 0 to 2 x I
1-4
Minimum operate time for inverse curves ,
step 1-4
Inverse time characteristics, see table 183,
table 185 and table 187
Operate time, start non-directional at 0 to 2 x
I
set
Reset time, start non-directional at 2 x I
Operate time, start non-directional at 0 to 10 x
I
set
Reset time, start non-directional at 10 x I
0
Critical impulse time
Impulse margin time
Operate frequency, directional overcurrent
Operate frequency, non-directional
overcurrent
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M12342-1 v21
Range or value
(5-2500)% of lBase
> 95% at (50–2500)% of
lBase
(1-10000)% of
(40.0–65.0) degrees
(40.0–89.0) degrees
(5–100)% of fundamental
, step (0.000-60.000) s
set
(0.000-60.000) s
16 curve types
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
10 ms typically at 0 to 2 x I
15 ms typically
38-83 Hz
10-90 Hz
Accuracy
±1.0% of I at I ≤ I
r r
±1.0% of I at I > I
r
lBase
-
±1.0% of I at I ≤ I
r r
±1.0% of I at I > I
r
±2.0 degrees
±2.0 degrees
±2.0% of I
r
±0.2% or ±35 ms whichever is greater
±0.2% or ±35 ms whichever is greater
See table 183, table 185
-
-
-
-
-
set
-
-
-
1MRK 505 379-BEN C
and table 187
ABB