Admittance-Based Earth-Fault Protection Efpadm - ABB RELION REC615 Technical Manual

1MRS758755 C
Name
4.2.3.9 Technical data
Table 376: INTRPTEF Technical data
Characteristic
Operation accuracy (Uo criteria with transi-
ent protection)
Operate time accuracy
Suppression of harmonics
4.2.3.10 Technical revision history
Table 377: INTRPTEF Technical revision history
Technical revision
B
C
D
E
4.2.4

Admittance-based earth-fault protection EFPADM

REC615 & RER615
Technical Manual
Type Values (Range)
4=test/blocked
5=off
Protection functions
Unit
Value
Depending on the frequency of the measured
current: f ±2 Hz
n
±1.5% of the set value or ±0.002 × U
±1.0% of the set value or ±20 ms
DFT: -50 dB at f = n × f , where n = 2, 3, 4, 5
n
Change
Minimum and default values changed to 40
ms for the Operate delay time setting
Minimum operate current setting is add-
The
ed. Correction in IEC 61850 mapping: DO
BlkEF renamed to InhEF. Minimum value
changed from 0.01 to 0.10 (default changed
from 0.01 to 0.20) for the
setting. Minimum value changed from 0 ms
Reset delay time setting.
to 40 ms for the
Voltage start value description changed from
"Voltage start value for transient EF" to "Volt-
age start value" since the start value is effec-
tive in both operation modes. Added support
for calculated Uo. Uo source (measured/cal-
culated) can be selected with "Uo signal
Voltage start value setting minimum
Sel".
changed from 0.10 to 0.05.
Min operate current setting scaling corrected
to RMS level from peak level.
Description
o
Voltage start value
341