Technical Data; Numerical Stabilized Low-Impedance Restricted Earth-Fault Protection Lrefpndf; Identification; Function Block - ABB RELION REX640 Technical Manual

Section 4
Protection functions
4.3.3.12
4.3.4
4.3.4.1
4.3.4.2
660
Name Type
IL1-bias:1 FLOAT32
IL2-bias:1 FLOAT32
IL3-bias:1 FLOAT32

Technical data

Table 603: TR3PTDF Technical data
Characteristic
Operation accuracy
1)2)
Start time
Reset time
Reset ratio
Suppression of harmonics
1) Current before fault = 0.0 × I
2) Measured with static power output (SPO)
Numerical stabilized low-impedance restricted earth-fault
protection LREFPNDF

Identification

Function description
Numerical stabilized low-impedance
restricted earth-fault protection

Function block

GUID-A9135EBE-817D-45E8-8A27-673A95DA2E74 V1 EN
Figure 362: Function block
Values (Range)
0.00...80.00
0.00...80.00
0.00...80.00
Value
Depending on the frequency of the measured
current: f
±3.0% of the set value or ±0.002 × I
Minimum
Low stage
30 ms
High stage
17 ms
Typically 40 ms
Typically 0.96
DFT: -50 dB at f = n × f
, f = 50 Hz. Injected differential current = 2.0 × set operation value.
n n
IEC 61850
identification
LREFPNDF
1MRS759142 C
Unit Description
Measured bias current
amplitude phase IL1
Measured bias current
amplitude phase IL2
Measured bias current
amplitude phase IL3
±2 Hz
n
n
Typical Maximum
35 ms 40 ms
18 ms 20 ms
, where n = 2, 3, 4, 5...
n
IEC 60617 ANSI/IEEE C37.2
identification device number
dIoLo> 87NLI
Technical Manual
REX640