ABB REC650 - Page 74

Table 25. Four step phase overcurrent protection, 3-phase output OC4PTOC (51/67)
Function Setting range Accuracy
Operate current (5-2500)% of lBase ± 1.0% of I
n
at I ≤ I
n
± 1.0% of I at I > I
n
Reset ratio > 95% -
Min. operating current (1-10000)% of lBase ± 1.0% of I
n
at I ≤ I
n
±1.0% of I at I > I
n
2nd harmonic blocking (5–100)% of fundamental ± 2.0% of I
n
Independent time delay (0.000-60.000) s ± 0.5% ±25 ms
Minimum operate time for
inverse characteristics
(0.000-60.000) s ± 0.5% ±25 ms
Inverse characteristics, see
table 70, table 71 and table 72
17 curve types
1)
ANSI/IEEE C37.112
IEC 60255–151
±3% or ±40 ms
0.10 ≤ k ≤ 3.00
1.5 x I
set
≤ I ≤ 20 x I
set
Operate time, nondirectional
pickup function
25 ms typically at 0 to 2 x I
set
-
Reset time, pickup function 30 ms typically at 2 to 0 x I
set
-
Operate time, directional pickup
function
50 ms typically at 0 to 2 x I
set
-
Reset time, directional pickup
function
35 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 -
1)
Note: Timing accuracy only valid when 2nd harmonic blocking is turned off
Bay control REC650 ANSI 1MRK 511 265-BUS B
Product version: 1.2
74 ABB