M12342-1 v16
Table 50. Four-step phase overcurrent protection OC4PTOC
Function
Setting range
Accuracy
Operate current, step 1 - 4
(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
-
Minimum operate current, step 1 -
4
(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
Second harmonic blocking
(5–100)% of fundamental
±
2.0% of I
r
Independent time delay at 0 to 2 x
I
set
, step 1 - 4
(0.000-60.000) s
±
0.2 % or
±
35 ms whichever is
greater
Minimum operate time for inverse
curves , step 1 - 4
(0.000-60.000) s
±0.2 % or ±35 ms whichever is
greater
Inverse time characteristics, see
table
16 curve types
See table
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
Operate time, start non-directional
at 0 to 10 x I
set
Min. = 5 ms
Max. = 20 ms
-
Reset time, start non-directional at
10 to 0 x I
set
Min. = 20 ms
Max. = 35 ms
-
Critical impulse time
10 ms typically at 0 to 2 x I
set
-
Impulse margin time
15 ms typically
-
M12340-2 v8
Table 51. Instantaneous residual overcurrent protection EFPIOC
Function
Range or value
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
-
Operate time at 0 to 2 x I
set
Min. = 15 ms
Max. = 25 ms
-
Reset time at 2 to 0 x I
set
Min. = 15 ms
Max. = 25 ms
-
Critical impulse time
10 ms typically at 0 to 2 x I
set
-
Operate time at 0 to 10 x I
set
Min. = 5 ms
Max. = 15 ms
-
Reset time at 10 to 0 x I
set
Min. = 25 ms
Max. = 35 ms
-
Critical impulse time
2 ms typically at 0 to 10 x I
set
-
Dynamic overreach
< 5% at
t
= 100 ms
-
1MRK 502 068-BEN D
Generator protection REG670 2.1 IEC
Product version: 2.1
62
ABB
