M15223-1 v14
Table 52. Four step residual overcurrent protection EF4PTOC technical data
Function
Range or value
Accuracy
Operate current, step 1 - 4
(1-2500)% of
lBase
±1.0% of I
r
at I ≤ I
r
±1.0% of I at I > I
r
Reset ratio
> 95% at (10-2500)% of
lBase
-
Relay characteristic angle
(RCA)
(-180 to 180) degrees
±2.0 degrees
Operate current for directional
release
(1–100)% of
lBase
For RCA ±60 degrees:
±2.5% of I
r
at I ≤ I
r
±2.5% of I at I > 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
and Table
16 curve types
and
Second harmonic blocking
(5–100)% of fundamental
±2.0% of I
r
Minimum polarizing voltage
(1–100)% of
UBase
±0.5% of U
r
Minimum polarizing current
(2-100)% of
IBase
±1.0% of I
r
Real part of source Z used for
current polarization
(0.50-1000.00)
W
/phase
-
Imaginary part of source Z used
for current polarization
(0.50–3000.00)
W
/phase
-
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
-
1MRK 502 068-BEN D
Generator protection REG670 2.1 IEC
Product version: 2.1
ABB
63
