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