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Table 34. Directional earth-fault protection (DEFxPDEF)
Characteristic
DEFLPDEF
Operation accuracy
DEFHPDEF
DEFHPDEF
Start time
1) 2)
I
= 2 x set Start value
Fault
DEFLPDEF
I
= 2 x set Start value
Fault
Reset time
Reset ratio
Retardation time
Operate time accuracy in definite time mode
Operate time accuracy in inverse time mode
Suppression of harmonics
1 Not included in REM615
2 Set Operate delay time = 0.06 s,Operate curve type = IEC definite time, Measurement mode = default (depends on stage), current before fault = 0.0 × In, fn = 50 Hz, earth-fault current
with nominal frequency injected from random phase angle, results based on statistical distribution of 1000 measurements
3 Includes the delay of the signal output contact
4) Maximum Start value = 2.5 × In, Start value multiples in range of 1.5...20
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Table 35. Directional earth-fault protection (DEFxPDEF) main settings
Parameter
Start value
Directional mode
Time multiplier
Operate delay time
Operating curve type
(2)
Operation mode
1 Not included in REM615
2 For further reference, see the Operating characteristics table
Value
Depending on the frequency of the measured current: f
Current:
±1.5% of set value or ±0.002 x I
Voltage:
±1.5% of set value or ±0.002 x I
Phase angle:
±2°
Current:
±1.5% of the set value or ±0.002 × I
(at currents in the range of 0.1...10 × I
±5.0% of the set value
(at currents in the range of 10...40 × I
(1)
Voltage:
±1.5% of the set value or ±0.002 × U
Phase angle:
±2°
Minimum
(1)
42 ms
58 ms
Typically 40 ms
Typically 0.96
< 30 ms
±1.0% of the set value or ±20 ms
±5.0% of the theoretical value or ±20 ms
RMS: No suppression
DFT: -50dB at f = n x f
Peak-to-Peak: No suppression
Function
DEFLPDEF
DEFLPDEF
(1)
DEFLPDEF and DEFHPDEF
DEFLPDEF
DEFHPDEF
(1)
DEFLPDEF
DEFHPDEF
(1)
DEFLPDEF
DEFHPDEF
(1)
DEFxPDEF
n
n
n
)
n
)
n
n
Typical
46 ms
62 ms
3)
, where n = 2, 3, 4, 5,...
n
Value (range)
0.010...5.000 × I
n
0.10...40.00 × I
n
1 = Non-directional
2 = Forward
3 = Reverse
0.05...15.00
0.05...15.00
50...200000 ms
40...200000 ms
Definite or inverse time
Curve type: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 17, 18, 19
Definite or inverse time
Curve type: 1, 3, 5, 15, 17
1 = Phase angle
2 = IoSin
3 = IoCos
4 = Phase angle 80
5 = Phase angle 88
±2 Hz
n
Maximum
49 ms
66 ms
Step
0.005
0.01
—
0.01
0.01
10
10
31
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