ABB REB670 - Page 39

Current protection
Table 25. Four step phase overcurrent protection OC4PTOC
Function Setting range Accuracy
Operate current (5-2500)% of lBase ± 1.0% of I
r
at I ≤ I
r
± 1.0% of I at I > I
r
Reset ratio > 95% at (50–2500)% of lBase -
Min. operating current (1-10000)% of lBase ± 1.0% of I
r
at I ≤ I
r
±1.0% of I at I > I
r
Relay characteristic angle (RCA) (40.0–65.0) degrees ± 2.0 degrees
Relay operating angle (ROA) (40.0–89.0) degrees ± 2.0 degrees
2nd harmonic blocking (5–100)% of fundamental ± 2.0% of I
r
Independent time delay at 0 to 2 x
I
set
(0.000-60.000) s ± 0.2 % or ± 35 ms whichever is
greater
Minimum operate time (0.000-60.000) s ± 2.0 % or ± 40 ms whichever is
greater
Inverse characteristics, see
table 63, table 64 and table 65
16 curve types See table 63, table 64 and table 65
Operate time, start non-directional
at 0 to 2 x I
set
Min. = 15 ms
Max. = 30 ms
Reset time, start non-directional at
2 to 0 x I
set
Min. = 15 ms
Max. = 30 ms
Critical impulse time 10 ms typically at 0 to 2 x I
set
-
Impulse margin time 15 ms typically -
Table 26. Four step single phase overcurrent protection PH4SPTOC
Function
Setting range Accuracy
Operate current (1-2500)% of l
base
± 1.0% of I
r
at I £ I
r
± 1.0% of I at I > I
r
Reset ratio > 95% -
Second harmonic blocking (5–100)% of fundamental ± 2.0% of I
r
Independent time delay (0.000-60.000) s ± 0.5% ± 10 ms
Minimum operate time (0.000-60.000) s ± 0.5% ± 10 ms
Inverse characteristics, see
table 63 and table 64
19 curve types See table 63 and table 64
Operate time, start function 25 ms typically at 0 to 2 x I
set
-
Reset time, start function 25 ms typically at 2 to 0 x I
set
-
Critical impulse time 10 ms typically at 0 to 2 x I
set
-
Impulse margin time 15 ms typically -
Busbar protection REB670
1MRK505212-BEN E
Pre-configured
Product version: 1.2
ABB 39