4.2.3.9
Technical data
Table 433: INTRPTEF Technical data
Characteristic
Value
Operation accuracy (Uo criteria with transient protection)
Depending on the frequency of the measured current: f
n
±2 Hz
±1.5% of the set value or ±0.002 × Uo
Operate time accuracy
±1.0% of the set value or ±20 ms
Suppression of harmonics
DFT: -50 dB at f = n × f
n
, where n = 2, 3, 4, 5
4.2.3.10
Technical revision history
Table 434: INTRPTEF Technical revision history
Technical revision
Change
B
Minimum and default values changed to 40
ms for the
Operate delay time
setting
C
The
Minimum operate current
setting is add-
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
Voltage start value
setting. Minimum value changed from 0 ms
to 40 ms for the
Reset delay time
setting.
D
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
Sel".
Voltage start value
setting minimum
changed from 0.10 to 0.05.
E
Min operate current
setting scaling corrected
to RMS level from peak level.
4.2.4
Admittance-based earth-fault protection EFPADM
4.2.4.1
Identification
Function description
IEC 61850
identification
IEC 60617
identification
ANSI/IEEE C37.2
device number
Admittance-based earth-fault pro-
tection
EFPADM
Yo> ->
21YN
Protection functions
1MRS757644 H
428
620 series
Technical Manual
