Table 30. Directional EF protection (DEFxPDEF)
Operation
accuracy
Depending on the frequency of the current measured: f
n
±2Hz
DEFLPDEF
Current:
±1.5% of the set value or ±0.002 x I
n
Voltage:
±1.5% of the set value or ±0.002 x U
n
Phase angle:
±2°
DEFHPDEF Current:
±2% of the set value or ±0.003 x I
n
(at currents in the range of 0.1…10 x I
n)
±5.0% of the set value
(at currents in the range of 10…40 x I
n)
Voltage:
±1.5% of the set value or ±0.01 x U
n
Phase angle:
±2°
Start time
1) 2)
Minimum Typical Maximum
DEFHPDEF and
DEFLPDEF:
I
Fault
= 2 x set Start value 61 ms 64 ms 66 ms
Reset time < 40 ms
Reset ratio Typical 0.96
Retardation time < 30 ms
Operate time accuracy in definite time mode ±1.0% of the set value or ±20 ms
Operate time accuracy in inverse time mode ±5.0% of the theoretical value or ±20 ms
3)
Suppression of harmonics RMS: No suppression DFT: -50dB at f =
n x f
n
, where n = 2, 3, 4, 5,…
Peak-to-Peak: No suppression
1) Set Operate delay time = 0,06 s, Operate curve type = IEC definite time, Measurement mode = default (depends
on stage), current before fault = 0.0 x In, fn = 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
3) Maximum Start value = 2.5 x In, Start value multiples in range of 1.5 to 20
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