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4.7
86
General fault criteria (GFC)
Technical data
Table 98:
GFC - General fault criteria, impedance and current based
Function
Impedance setting
Reactive reach for-
range at I
= 1A
ward
r
Reactive reach
reverse
Resistive reach
(forward & reverse)
Overcurrent setting
Phase currents
range
Residual current
Timers
For phase-to-phase measuring elements
For phase-to-earth measuring elements
Static angular accu-
Voltage range (0.1-1.1) x U
racy at 0 degrees and
Current range (0.5-30) x I
85 degrees
Reset ratio
Positive-sequence reac-
tance
Zero-sequence reactance
Positive-sequence reac-
tance
Zero-sequence reactance
For phase - phase faults
For phase - earth faults
Load encroachment
Safety load impedance
angle
r
r
Chapter 4
Line distance
Value
0.1-400 ohm/phase in steps of
0.01 ohm/phase
0.1-1200 ohm/phase in steps
of 0.01 ohm /phase
0.1-400 ohm/phase in steps of
0.01 ohm/phase
0.1-1200 ohm/phase in steps
of 0.01 ohm /phase
0.1-400 ohm/loop in steps
of 0.01 ohm/loop
0.1-400 ohm/loop in steps
of 0.01 ohm/loop
0.1-400 ohm/loop in steps
of 0.01 ohm/loop
5-45 degrees in steps of 1
degrees
10-400% of I1b in steps of 1%
10-150% of I4b in steps of 1%
0.000-60.000 s in steps of
1 ms
0.000-60.000 s in steps of
1 ms
+/-5 degrees
105% typically
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