44 REF615 ANSI 5.0 FP1 FEEDER PROTECTION AND CONTROL
—
Table 36. Directional earth-fault protection (DEFxPDEF)
Characteristic Value
Operation accuracy
DEFLPDEF
Depending on the frequency of the measured current: f
n
n
DEFHPDEF
n
n
)
n
)
Start time
Minimum Typical Maximum
DEFHPDEF
I
Fault
DEFLPDEF
I
Fault
Reset time
Reset ratio
Retardation time
Operate time accuracy in definite time mode
Operate time accuracy in inverse time mode
Suppression of harmonics
RMS: No suppression
n
Peak-to-Peak: No suppression
n
, f
n
= 50 Hz, earth-fault current
with nominal frequency injected from random phase angle, results based on statistical distribution of 1000 measurements
2) Includes the delay of the signal output contact
1) For further reference, see the Operation characteristics table
—
Table 37. Directional earth-fault protection (DEFxPDEF) main settings
Parameter Function Value (range) Step
Start value
DEFLPDEF
n
DEFLPDEF
n
Directional mode
DEFLPDEF and DEFHPDEF
Time multiplier
DEFLPDEF
DEFHPDEF
Operate delay time
DEFLPDEF
DEFHPDEF 40...200000 ms
Operating curve type
DEFLPDEF
Definite or inverse time
DEFHPDEF
Definite or inverse time
Operation mode DEFxPDEF
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