Directional Ef Protection (Defxpdef) - ABB REF615 Product Manual

ABB
Feeder Protection and Control
REF615
Product version: 2.0
Table 30. Directional EF protection (DEFxPDEF)
Operation Depending on the frequency of the current measured: f
accuracy
DEFLPDEF
DEFHPDEF
Start time
1) 2)
DEFHPDEF and
DEFLPDEF:
I
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 x In, fn = 50 Hz, earth-fault current 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 x In, Start value multiples in range of 1.5 to 20
= 2 x set Start value
Current:
±1.5% of the set value or ±0.002 x I
Voltage:
±1.5% of the set value or ±0.002 x U
Phase angle:
±2°
Current:
±2% of the set value or ±0.003 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
Voltage:
±1.5% of the set value or ±0.01 x U
Phase angle:
±2°
Minimum Typical
61 ms 64 ms
< 40 ms
Typical 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 , where n = 2, 3, 4, 5,...
n
Peak-to-Peak: No suppression
1MRS756379 D
±2Hz
n
n
n
n
n)
n)
n
Maximum
66 ms
3)
27