ABB RELION 620 Series Technical Manual page 418

Section 4
Protection functions
4.2.3.9
4.2.3.10
4.2.4
4.2.4.1
412
Technical data
Table 433: INTRPTEF Technical data
Characteristic
Operation accuracy (Uo criteria with transient
protection)
Operate time accuracy
Suppression of harmonics
Technical revision history
Table 434: INTRPTEF Technical revision history
Technical revision
B
C
D
E
Admittance-based earth-fault protection EFPADM
Identification
Function description
Admittance-based earth-fault protection
Value
Depending on the frequency of the measured
current: f ±2 Hz
n
±1.5% of the set value or ±0.002 × Uo
±1.0% of the set value or ±20 ms
DFT: -50 dB at f = n × f
Change
Minimum and default values changed to 40 ms for
Operate delay time setting
the
Minimum operate current setting is added.
The
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
Voltage start value setting. Minimum value
the
changed from 0 ms to 40 ms for the
time setting.
Voltage start value description changed from
"Voltage start value for transient EF" to "Voltage
start value" since the start value is effective in both
operation modes. Added support for calculated
Uo. Uo source (measured/calculated) can be
selected with "Uo signal Sel".
setting minimum changed from 0.10 to 0.05.
Min operate current setting scaling corrected to
RMS level from peak level.
IEC 61850 IEC 60617
identification identification
EFPADM Yo> ->
1MRS757644 F
, where n = 2, 3, 4, 5
n
Reset delay
Voltage start value
ANSI/IEEE C37.2
device number
21YN
620 series
Technical Manual