Name
Values (Range)
Unit
Step
Default
Description
IphPickup
1 - 100
%IB
1
20
Current level for detection of dead line in % of
IBase
UVPickup
1 - 100
%VB
1
70
Voltage level for detection of dead line in % of
VBase
tDuration
0.000 - 60.000
s
0.001
0.020
Time delay for VI detection (s)
tSOTF
0.000 - 60.000
s
0.001
1.000
Drop off delay time of switch onto fault function
tDLD
0.000 - 60.000
s
0.001
0.200
Delay time for activation of dead line detection
6.14.6
Technical data
Table 178:
ZCVPSOF technical data
Parameter
Range or value
Accuracy
Operate voltage, detection of dead line
(1–100)% of
VBase
± 0.5% of V
n
Operate current, detection of dead line
(1–100)% of
IBase
± 1.0% of I
n
Delay following dead line detection input before
Automatic switch into fault logic function is
automatically enabled
(0.000–60.000) s
± 0.5% ± 10 ms
Time period after circuit breaker closure in which
Automatic switch into fault logic function is active
(0.000–60.000) s
± 0.5% ± 10 ms
6.15
Phase preference logic PPLPHIZ
Function description
IEC 61850
identification
IEC 60617
identification
ANSI/IEEE C37.2
device number
Phase preference logic
PPLPHIZ
-
-
6.15.1
Introduction
Phase preference logic function PPLPHIZ is intended to be used in isolated or high
impedance grounded networks where there is a requirement to trip only one of the
faulty lines at cross-country fault.
Phase preference logic inhibits tripping for single phase-to-ground faults in isolated
and high impedance grounded networks, where such faults are not to be cleared by
distance protection. For cross-country faults, the logic selects either the leading or the
lagging phase-ground loop for measurement and initiates tripping of the preferred fault
Section 6
1MRK505222-UUS C
Impedance protection
372
Technical reference manual
Summary of Contents for Relion 670 series
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