ABB REF615 ANSI 5.0 FP1 Product Manual page 44

4 4 R E F 6 1 5 A N S I 5 . 0 F P 1 F E E D E R P R OT E C T I O N A N D C O N T R O L
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Table 36. 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) Set Operate delay time = 0.06 s,Operate curve type = IEC definite time, Measurement mode = default (depends on stage), current before fault = 0.0 × I
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 × In, Start value multiples in range of 1.5...20
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Table 37. Directional earth-fault protection (DEFxPDEF) main settings
Parameter
Start value
Directional mode
Time multiplier
Operate delay time
Operating curve type 1)
Operation mode
1) For further reference, see the Operation characteristics table
Value
Depending on the frequency of the measured current: f
±1.5% of the set value or ±0.002 x I
±1.5% of set value or ±0.002 x I
(at currents in the range of 0.1...10 x I
±5.0% of the set value
(at currents in the range of 10...40 x I
Minimum
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
DEFLPDEF and DEFHPDEF
DEFLPDEF
DEFHPDEF
DEFLPDEF
DEFHPDEF
DEFLPDEF
DEFHPDEF
DEFxPDEF
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
, f = 50 Hz, earth-fault current
n n
Step
0.005
0.01
0.01
10
10