ABB Relion 620 Series - Page 726

4.7.1.6 Signals
Table 684: UEXPDIS Input signals
Name Type Default Description
I_A SIGNAL 0 Phase A current
I_B SIGNAL 0 Phase B current
I_C SIGNAL 0 Phase C current
U_A_AB SIGNAL 0 Phase-to-earth volt-
age A or phase-to-
phase voltage AB
U_B_BC SIGNAL 0 Phase-to-earth volt-
age B or phase-to-
phase voltage BC
U_C_CA SIGNAL 0 Phase-to-earth volt-
age C or phase-to-
phase voltage CA
BLOCK BOOLEAN 0=False Block signal for acti-
vating the blocking
mode
EXT_LOS_DET BOOLEAN 0=False External signal for
excitation loss detec-
tion
Table 685: UEXPDIS Output signals
Name Type Description
OPERATE BOOLEAN Operate
START BOOLEAN Start
4.7.1.7 Settings
Table 686: UEXPDIS Group settings (Basic)
Parameter
Values (Range) Unit Step Default Description
Diameter 1...6000 %Zn 1 200 Diameter of the
Mho diagram
Offset -1000...1000 %Zn 1 -10 Offset of top of
the impedance cir-
cle from the R-axis
Displacement -1000...1000 %Zn 1 0 Displacement of
impedance circle
centre from the X-
axis
Operate delay time 60...200000 ms 10 5000 Operate delay time
Protection functions 1MRS757644 H
726 620 series
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