Fault Locator (Scefrflo); Fault Locator (Scefrflo) Main Settings - ABB REF630 Product Manual

Feeder Protection and Control
REF630
Product version: 1.0
Table 65. Fault locator (SCEFRFLO)
Characteristic
Operation accuracies
Suppression of harmonics
Table 66. Fault locator (SCEFRFLO) main settings
Parameter
Phase voltage Meas
Calculation Trg mode SCEFRFLO
Pre fault time
Z Max phase load
Ph leakage Ris
Ph capacitive React
R1 line section A
X1 line section A
R0 line section A
X0 line section A
Line Len section A
46
Function
SCEFRFLO
SCEFRFLO
SCEFRFLO
SCEFRFLO
SCEFRFLO
SCEFRFLO
SCEFRFLO
SCEFRFLO
SCEFRFLO
SCEFRFLO
Value
At the frequency f = f
n
Current: ±1.5% of the set value or ±0.002 × I
Voltage: ±1.5% of the set value or ±0.002 × U
Fault location accuracy: ±2.5% of the line
length
Actual fault location accuracy depends on
the fault and the power system characteristics.
DFT: -50 dB at f = n x f
n
...
Values (Range)
Accurate PP without
Uo
External Internal
Continuous
0.100...300.000 s
1.00...10000.00 ohm
1...1000000 ohm
1...1000000 ohm
0.001...1000.000
ohm/pu
0.001...1000.000
ohm/pu
0.001...1000.000
ohm/pu
0.001...1000.000
ohm/pu
0.001...1000.000 pu
1MRS756380 A
Issued: 15.09.2009
n
n
, where n = 2, 3, 4, 5,
Step
-
-
0.001
0.01
1
1
0.001
0.001
0.001
0.001
0.001
ABB