GE D30 Instruction Manual page 434
Line distance protection system
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GROUPED ELEMENTS
Multiplier
Current ( I / I
(TDM)
1.5
2.0
2.310
4.0
4.621
6.0
6.931
8.0
9.242
10.0
11.552
IAC Short Inverse
0.5
0.072
1.0
0.143
2.0
0.286
4.0
0.573
6.0
0.859
8.0
1.145
10.0
1.431
2
I
t curves
2
The I
t curves are derived as follows:
5
where
T = Operate time (in seconds)
TDM = Multiplier setting
I = Input current
I
= Pickup Current setting
pickup
T
= reset time in seconds (assuming energy capacity is 100% and RESET is "Timed")
RESET
2
Table 5-31: I
t curve trip times
Multiplier
(TDM)
0.01
0.10
1.00
10.00
100.00
600.00
5-224
)
pickup
2.0
3.0
4.0
1.499
1.064
0.885
2.997
2.128
1.770
4.496
3.192
2.656
5.995
4.256
3.541
7.494
5.320
4.426
0.047
0.035
0.031
0.095
0.070
0.061
0.190
0.140
0.123
0.379
0.279
0.245
0.569
0.419
0.368
0.759
0.559
0.490
0.948
0.699
0.613
Current ( I / I
)
pickup
1.5
2.0
3.0
0.44
0.25
0.11
4.44
2.50
1.11
44.44
25.00
11.11
444.44
250.00
111.11
4444.4
2500.0
1111.1
26666.7
15000.0
6666.7
5.0
6.0
7.0
0.784
0.719
0.674
1.569
1.439
1.348
2.353
2.158
2.022
3.138
2.878
2.695
3.922
3.597
3.369
0.028
0.027
0.026
0.057
0.054
0.052
0.114
0.108
0.105
0.228
0.217
0.210
0.341
0.325
0.314
0.455
0.434
0.419
0.569
0.542
0.524
4.0
5.0
6.0
0.06
0.04
0.03
0.63
0.40
0.28
6.25
4.00
2.78
62.50
40.00
27.78
625.00
400.00
277.78
3750.0
2400.0
1666.7
D30 LINE DISTANCE PROTECTION SYSTEM – INSTRUCTION MANUAL
CHAPTER 5: SETTINGS
8.0
9.0
0.640
0.614
1.280
1.229
1.921
1.843
2.561
2.457
3.201
3.072
0.026
0.025
0.051
0.050
0.102
0.100
0.204
0.200
0.307
0.301
0.409
0.401
0.511
0.501
7.0
8.0
9.0
0.02
0.02
0.01
0.20
0.16
0.12
2.04
1.56
1.23
20.41
15.63
12.35
204.08
156.25
123.46
1224.5
937.50
740.74
10.0
0.594
1.188
1.781
2.375
2.969
0.025
0.049
0.099
0.197
0.296
0.394
0.493
Eq. 5-10
10.0
0.01
0.10
1.00
10.00
100.00
600.00
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