ABB REL 501-C1 2.5, Technical Reference Manual

Page: 97 / 238

85
General fault criteria (GFC) Chapter 4
Line distance
Table 97: Setting parameters for the underimpedance operating mode (I
r
= 1A, divide by
5 for I
r
= 5A)
Parameter Range Default Unit Description
Operation Z< Off/On Off - Operation of underimpedance based
GFC measurement enabled or disabled
ARGLd 5-45
Step: 1 25 degrees Load angle determining the load imped-
ance area
RLd 0.10-400.00
Step: 0.01 50 ohm/loop Limitation of resistive reach within the
load impedance area
X1RvPP 0.10-400.00
Step: 0.01 50 ohm/phas
e Positive sequence reactive reach in
reverse direction for phase-to-phase
faults
X1FwPP 0.10-400.00
Step: 0.01 50 ohm/phas
e Positive sequence reactive reach in for-
ward direction for phase-to-phase faults
RFPP 0.10-400.00
Step: 0.01 50 ohm/loop Resistive reach (forward and reverse) for
phase-to-phase measurement
X1RvPE 0.1-400.00
Step: 0.01 50 ohm/phas
e Positive sequence reactive reach in
reverse direction for phase-to-earth faults
X1FwPE 0.1-400.00
Step: 0.01 50 ohm/phas
e Positive sequence reactive reach in for-
ward direction for phase-to-earth faults
X0FwPE 0.1-1200.00
Step: 0.01 50 ohm/phas
e Zero sequence reactance of reach in for-
ward direction for phase-to-earth faults
X0RvPE 0.1-1200.00
Step: 0.01 50 ohm/phas
e Zero sequence reactance of reach in
reverse direction for phase-to-earth faults
RFPE 0.1-400.00
Step: 0.01 50 ohm/loop Resistive reach (forward and reverse) for
phase-to-earth measurement