Table 67. Wattmetric-based earth-fault protection (WPWDE) main settings
Parameter
Function
Value (Range)
Step
Directional mode
WPWDE
2 = Forward
3 = Reverse
-
Current start value
WPWDE
0.010...5.000 × I
n
0.001
Voltage start value
WPWDE
0.010...1.000 × U
n
0.001
Power start value
WPWDE
0.003...1.000 × S
n
0.001
Reference power
WPWDE
0.050...1.000 × S
n
0.001
Characteristic angle
WPWDE
-179...180°
1
Time multiplier
WPWDE
0.025...2.000
0.005
Operating curve type
1)
WPWDE
Definite or inverse time
Curve type: 5, 15, 20
Operate delay time
WPWDE
60...300000 ms
10
Min operate current
WPWDE
0.010...1.000 × I
n
0.001
Min operate voltage
WPWDE
0.01...1.00 × U
n
0.01
1)
For further reference, see the Operating characteristics table
Table 68. Transient/intermittent earth-fault protection (INTRPTEF)
Characteristic
Value
Operation accuracy (Uo criteria with transient protection)
Depending on the frequency of the measured current: f
n
±2 Hz
±1.5% of the set value or ±0.002 × Uo
Operate time accuracy
±1.0% of the set value or ±20 ms
Suppression of harmonics
DFT: -50 dB at f = n × f
n
, where n = 2, 3, 4, 5
Table 69. Transient/intermittent earth-fault protection (INTRPTEF) main settings
Parameter
Function
Value (Range)
Step
Directional mode
INTRPTEF
1 = Non-directional
2 = Forward
3 = Reverse
-
Operate delay time
INTRPTEF
40...1200000 ms
10
Voltage start value
INTRPTEF
0.05...0.50 × U
n
0.01
Operation mode
INTRPTEF
1 = Intermittent EF
2 = Transient EF
-
Peak counter limit
INTRPTEF
2...20
1
Min operate current
INTRPTEF
0.01...1.00 × I
n
0.01
1MRS759144 A
REX640
Product version: 1
ABB
51
Summary of Contents for RELION REX640
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