GE N60 Instruction Manual page 365
Network stability and synchrophasor measurement system
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CHAPTER 5: SETTINGS
Multiplier
Current ( I / I
pickup
(TDM)
1.5
2.0
8.0
27.183
11.987
10.0
33.979
14.983
IAC Very Inverse
0.5
1.451
0.656
1.0
2.901
1.312
2.0
5.802
2.624
4.0
11.605
5.248
6.0
17.407
7.872
8.0
23.209
10.497
10.0
29.012
13.121
IAC Inverse
0.5
0.578
0.375
1.0
1.155
0.749
2.0
2.310
1.499
4.0
4.621
2.997
6.0
6.931
4.496
8.0
9.242
5.995
10.0
11.552
7.494
IAC Short Inverse
0.5
0.072
0.047
1.0
0.143
0.095
2.0
0.286
0.190
4.0
0.573
0.379
6.0
0.859
0.569
8.0
1.145
0.759
10.0
1.431
0.948
2
I
t curves
2
The I
t curves are derived as follows:
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 5-35: I
t curve trip times
Multiplier
Current ( I / I
(TDM)
1.5
0.01
0.44
0.10
4.44
N60 NETWORK STABILITY AND SYNCHROPHASOR MEASUREMENT SYSTEM – INSTRUCTION MANUAL
)
3.0
4.0
5.0
4.846
2.844
1.966
6.058
3.555
2.457
0.269
0.172
0.133
0.537
0.343
0.266
1.075
0.687
0.533
2.150
1.374
1.065
3.225
2.061
1.598
4.299
2.747
2.131
5.374
3.434
2.663
0.266
0.221
0.196
0.532
0.443
0.392
1.064
0.885
0.784
2.128
1.770
1.569
3.192
2.656
2.353
4.256
3.541
3.138
5.320
4.426
3.922
0.035
0.031
0.028
0.070
0.061
0.057
0.140
0.123
0.114
0.279
0.245
0.228
0.419
0.368
0.341
0.559
0.490
0.455
0.699
0.613
0.569
)
pickup
2.0
3.0
4.0
0.25
0.11
0.06
2.50
1.11
0.63
6.0
7.0
8.0
1.487
1.191
0.991
1.859
1.488
1.239
0.113
0.101
0.093
0.227
0.202
0.186
0.453
0.405
0.372
0.906
0.810
0.745
1.359
1.215
1.117
1.813
1.620
1.490
2.266
2.025
1.862
0.180
0.168
0.160
0.360
0.337
0.320
0.719
0.674
0.640
1.439
1.348
1.280
2.158
2.022
1.921
2.878
2.695
2.561
3.597
3.369
3.201
0.027
0.026
0.026
0.054
0.052
0.051
0.108
0.105
0.102
0.217
0.210
0.204
0.325
0.314
0.307
0.434
0.419
0.409
0.542
0.524
0.511
5.0
6.0
7.0
0.04
0.03
0.02
0.40
0.28
0.20
GROUPED ELEMENTS
9.0
10.0
0.848
0.741
1.060
0.926
0.087
0.083
0.174
0.165
0.349
0.331
0.698
0.662
1.046
0.992
1.395
1.323
1.744
1.654
0.154
0.148
0.307
0.297
0.614
0.594
1.229
1.188
1.843
1.781
2.457
2.375
3.072
2.969
0.025
0.025
0.050
0.049
0.100
0.099
0.200
0.197
0.301
0.296
0.401
0.394
0.501
0.493
Eq. 5-13
8.0
9.0
10.0
0.02
0.01
0.01
0.16
0.12
0.10
5-205
5
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