ABB RED670 - Four Step Residual Overcurrent Protection EF4 PTOC Technical Data

Table 51. 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 171, Table 172 and Table
173
16 curve types See Table 171, Table 172 and
Table 173
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 505 346-BEN -
Line differential protection RED670 2.1 IEC
Product version: 2.1
ABB 69