ABB REM630 Product Manual page 33

ABB
Motor Protection and Control
REM630
Product version: 1.1
Table 35. Directional earth-fault protection (DEFxPDEF) main settings
Parameter
Start Value
Directional mode
Time multiplier
Operate delay time
Operating curve
1)
type
Operation mode
1) For further reference, refer to the Operating characteristics table
Table 36. Rotor earth-fault protection (MREFPTOC)
Characteristic
Operation accuracy
1)2)
Start time
Reset time
Reset ratio
Retardation time
Operate time accuracy
Suppression of harmonics
1) 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.
Function
DEFLPDEF
DEFHPDEF
DEFLPDEF and
DEFHPDEF
DEFLPDEF
DEFHPDEF
DEFLPDEF
DEFHPDEF
DEFLPDEF
DEFHPDEF
DEFLPDEF and
DEFHPDEF
Value (Range)
0.010...5.000 pu
0.10...40.00 pu
1=Non-directional
2=Forward
3=Reverse
0.05...15.00
0.05...15.00
0.06...200.00 s
0.06...200.00 s
Definite or inverse time
Curve type: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12,
13, 14, 15, 17, 18, 19
Definite or inverse time
Curve type: 1, 3, 5, 15, 17
1=Phase angle
2=IoSin
3=IoCos
4=Phase angle 80
5=Phase angle 88
Value
Depending on the frequency of the current
measured f=fn ± 2 Hz
±1.5% of the set value or ±0.002 x In
Typical 25 ms (+-15ms)
< 50 ms
Typical 0.96
< 50 ms
±1.0% of the set value of ±20 ms
-50dB at f = n x fn, where n = 2, 3, 4, 5,...
1MRS756977 D
Issued: 2011-05-18
Step
0.005
0.01
0.05
0.05
0.01
0.01
33