Table 34. Directional earth-fault protection (DEFxPDEF) main settings
Parameter Function Value (Range) Step
Start Value DEFLPDEF 0.010...5.000 pu 0.005
DEFHPDEF 0.10...40.00 pu 0.01
Directional mode DEFLPDEF and
DEFHPDEF
1=Non-directional
2=Forward
3=Reverse
Time multiplier DEFLPDEF 0.05...15.00 0.05
DEFHPDEF 0.05...15.00 0.05
Operate delay time DEFLPDEF 0.06...200.00 s 0.01
DEFHPDEF 0.06...200.00 s 0.01
Operating curve
type
1)
DEFLPDEF Definite or inverse time
Curve type: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12,
13, 14, 15, 17, 18, 19
DEFHPDEF Definite or inverse time
Curve type: 1, 3, 5, 15, 17
Operation mode DEFLPDEF and
DEFHPDEF
1=Phase angle
2=I
0
Sin
3=I
0
Cos
4=Phase angle 80
5=Phase angle 88
1) For further reference please refer to the Operating characteristics table
Table 35. Transient/intermittent earth-fault protection (INTRPTEF)
Characteristic
Value
Operation accuracy (U
0
criteria with
transient protection)
At the frequency f = f
n
±1.5% of the set value or ±0.002 × U
n
Operate time accuracy ±1.0% of the set value or ±20 ms
Suppression of harmonics DFT: -50dB at f = n × f
n
, where n = 2, 3, 4, 5
Feeder Protection and Control 1MRS756380 A
REF630
Product version: 1.0 Issued: 15.09.2009
ABB 33
To Next Page
Loading...
