Name
Values (Range)
Unit
Step
Default
Description
OpModeZ3
Disable-Zone
Enable-Zone
-
-
Disable-Zone
Operation mode of Zone 3
Z3Fwd
0.005 - 3000.000
ohm/p
0.001
30.000
Forward reach setting for Zone 3
Z3Rev
0.005 - 3000.000
ohm/p
0.001
30.000
Reverse reach setting for Zone 3
tZ3
0.000 - 60.000
s
0.001
1.000
Time delay to operate for Zone 3
Table 58:
ZGCPDIS Group settings (advanced)
Name
Values (Range)
Unit
Step
Default
Description
LoadEnchModeZ3
Off
On
-
-
Off
Enable load enchroachment mode Zone 3
Table 59:
ZGCPDIS Non group settings (basic)
Name
Values (Range)
Unit
Step
Default
Description
GlobalBaseSel
1 - 6
-
1
1
Selection of one of the Global Base Value
groups
7.2.6
Operation principle
7.2.6.1
Full scheme measurement
The execution of the different fault loops for phase-to-phase faults are executed in
parallel. The use of full scheme technique gives faster operation time compared to the
switched schemes that uses a start element to select correct voltage and current
depending on the fault type.
7.2.6.2
Impedance characteristic
The distance function consists of three zones. Each zone is self polarized offset mho
characteristics with reverse offset. The operating characteristic is in accordance to
figure
.
1MRK 504 135-UEN A
Section 7
Impedance protection
133
Technical manual
Summary of Contents for ret650
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