ABB Relion REM615 Product Manual page 32

Motor Protection and Control
REM615
Product version: 3.0
Table 29. Directional earth-fault protection (DEFxPDEF)
Characteristic
Operation accuracy
2)3)
Start time
Reset time
Reset ratio
Retardation time
Operate time accuracy in definite time mode
Operate time accuracy in inverse time mode
Suppression of harmonics
1) Not included in REM615
2) 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 I
random phase angle, results based on statistical distribution of 1000 measurements
3) Includes the delay of the signal output contact
4) Maximum Start value = 2.5 x I
32
DEFLPDEF
1)
DEFHPDEF
1)
DEFHPDEF
I = 2 x set Start
Fault
value
DEFLPDEF
I = 2 x set Start
Fault
value
, f = 50 Hz, earth-fault current with nominal frequency injected from
n n
, Start value multiples in range of 1.5 to 20
n
Value
Depending on the frequency of the current
measured: f ±2 Hz
n
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:
±1.5% of the 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
Voltage:
±1.5% of the set value or ±0.002 x U
Phase angle:
±2°
Minimum Typical
42 ms 44 ms
61ms 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: -50 dB at f = n x f
n
...
Peak-to-Peak: No suppression
1MRS756890 D
Issued: 2010-06-29
n
n
n
)
n
)
n
n
Maximum
46 ms
66 ms
4)
, where n = 2, 3, 4, 5,
ABB