ABB RED615 Product Manual page 41

ABB
Line Differential Protection and Control
RED615
Product version: 4.0
Table 42. Harmonics earth-fault protection (HAEFPTOC)
Characteristic
Operation accuracy
1)2)
Start time
Reset time
Reset ratio
Operate time accuracy in definite time mode
Operate time accuracy in IDMT mode
Suppression of harmonics
1) Fundamental frequency current = 1.0 x In. Harmonics current before fault = 0.0 x In, harmonics fault current 2.0 x Start value. Results based on
statistical distribution of 1000 measurement.
2) Includes the delay of the signal output contact
3) Maximum Start value = 2.5 x In, Start value multiples in range of 2 to 20
Table 43. HAEFPTOC main settings
Parameter
Start value
Time multiplier
Operate delay time
Minimum operate time
Operating curve type
3)
Function
HAEFPTOC
HAEFPTOC
HAEFPTOC
HAEFPTOC
HAEFPTOC
Value
Depending on the frequency of the current measured: fn
±2 Hz
±5 % of the set value or ±0.004 x In
Typical 77 ms
< 40 ms
Typical 0.96
±1.0% of the set value or ±20 ms
±5.0% of the set value or ±20 ms
-50dB at f= fn
-3dB at f= 13 x fn
Values (Range)
0.05...5.00 x I
n
0.05...15.00
100...200000 ms
100...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
1MRS756500 F
Step
0.01
0.01
10
10
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