ABB RED615 Product Manual page 38

Line Differential Protection and Control
RED615
Product version: 4.0
Table 37. Transient/intermittent earth-fault protection (INTRPTEF) main settings
Parameter
Directional mode
Operate delay time
Voltage start value (voltage
start value for transient EF)
Operation mode
Peak counter limit (Min
requirement for peak
counter before start in IEF
mode)
Min operate current
Table 38. Admittance-based earth-fault protection (EFPADM)
Characteristic
1)
Operation accuracy
2)
Start time
Reset time
Operate time accuracy
Suppression of harmonics
1) Uo = 1.0 x Un
2) Includes the delay of the signal output contact. Results based on statistical distribution of 1000 measurements.
38
Function
INTRPTEF
INTRPTEF
INTRPTEF
INTRPTEF
INTRPTEF
INTRPTEF
Value
At the frequency f = f
n
±1.0% or ±0.01 mS
(In range of 0.5 - 100 mS)
Minimum
56 ms
40 ms
±1.0% of the set value of ±20 ms
-50 dB at f = n x f , where n = 2, 3, 4, 5,...
n
Value (Range)
1=Non-directional
2=Forward
3=Reverse
40...1200000 ms
0.01...0.50 x Un
1=Intermittent EF
2=Transient EF
2...20
0.01...1.00 x In
Typical
60 ms
1MRS756500 F
Step
-
10
0.01
-
-
0.01
Maximum
64 ms
ABB