POWER
CABLE (TAPE SHIELD) SEQUENCE IMPEDANCE DATA
Three
Phase — Copper Conductors — ohms/1,000 ft.
5kV
| |
Three
1/C Cables |
3/C
Cable |
Size
(AWG/kcmil) |
Positive/Negative |
Zero
Sequence |
Positive/Negative |
Zero
Sequence |
| 6 |
0.519
+ j 0.115 |
0.803
+ j 0.501 |
0.514
+ j 0.050 |
0.880
+ j 0.548 |
| 4 |
0.329
+ j 0.110 |
0.619
+ j 0.479 |
0.323
+ j 0.047 |
0.694
+ j 0.519 |
| 2 |
0.209
+ j 0.104 |
0.506
+ j 0.453 |
0.204
+ j 0.043 |
0.577
+ j 0.485 |
| 1 |
0.167
+ j 0.100 |
0.468
+ j 0.437 |
0.162
+ j 0.041 |
0.536
+ j 0.464 |
| 1/0 |
0.134
+ j 0.098 |
0.438
+ j 0.421 |
0.128
+ j 0.039 |
0.504
+ j 0.444 |
| 2/0 |
0.108
+ j 0.095 |
0.414
+ j 0.404 |
0.102
+ j 0.038 |
0.477
+ j 0.423 |
| 3/0 |
0.087
+ j 0.092 |
0.395
+ j 0.386 |
0.081
+ j 0.037 |
0.455
+ j 0.401 |
| 4/0 |
0.070
+ j 0.090 |
0.380
+ j 0.367 |
0.064
+ j 0.035 |
0.436
+ j 0.378 |
| 250 |
0.061
+ j 0.087 |
0.371
+ j 0.349 |
0.055
+ j 0.034 |
0.423
+ j 0.357 |
| 350 |
0.046
+ j 0.083 |
0.354
+ j 0.319 |
0.040
+ j 0.033 |
0.400
+ j 0.321 |
| 500 |
0.034
+ j 0.079 |
0.338
+ j 0.281 |
0.028
+ j 0.032 |
0.376
+ j 0.279 |
| 750 |
0.026
+ j 0.074 |
0.319
+ j 0.240 |
0.020
+ j 0.030 |
0.349
+ j 0.235 |
| 1000 |
0.022
+ j 0.071 |
0.305
+ j 0.213 |
0.016
+ j 0.029 |
0.331
+ j 0.207 |
| 1250 |
0.019
+ j 0.070 |
0.290
+ j 0.189 |
0.014
+ j 0.031 |
0.311
+ j 0.182 |
| 1500 |
0.018
+ j 0.066 |
0.281
+ j 0.171 |
0.012
+ j 0.028 |
0.299
+ j 0.164 |
| 1750 |
0.017
+ j 0.064 |
0.272
+ j 0.159 |
0.011
+ j 0.028 |
0.288
+ j 0.152 |
| 2000 |
0.016
+ j 0.063 |
0.264
+ j 0.148 |
0.011
+ j 0.027 |
0.279
+ j 0.141 |
8kV
| |
Three
1/C Cables
|
3/C
Cable
|
Size
(AWG/kcmil) |
Positive/Negative |
Zero
Sequence |
Positive/Negative |
Zero
Sequence |
|
6
|
0.520 + j 0.115
|
0.814 + j 0.474
|
0.514 + j 0.053
|
0.887 + j 0.510
|
|
4
|
0.329 + j 0.110
|
0.628 + j 0.453
|
0.323 + j 0.049
|
0.698 + j 0.483
|
|
2
|
0.209 + j 0.104
|
0.513 + j 0.429
|
0.204 + j 0.046
|
0.579 + j 0.452
|
|
1
|
0.167 + j 0.100
|
0.473 + j 0.412
|
0.162 + j 0.043
|
0.537 + j 0.432
|
|
1/0
|
0.134 + j 0.098
|
0.442 + j 0.398
|
0.128 + j 0.041
|
0.503 + j 0.414
|
|
2/0
|
0.108 + j 0.095
|
0.417 + j 0.382
|
0.102 + j 0.040
|
0.475 + j 0.394
|
|
3/0
|
0.087 + j 0.092
|
0.397 + j 0.365
|
0.081 + j 0.038
|
0.451 + j 0.374
|
|
4/0
|
0.070 + j 0.090
|
0.380 + j 0.347
|
0.064 + j 0.037
|
0.431 + j 0.353
|
|
250
|
0.061 + j 0.087
|
0.370 + j 0.330
|
0.055 + j 0.036
|
0.418 + j 0.333
|
|
350
|
0.046 + j 0.083
|
0.351 + j 0.297
|
0.040 + j 0.035
|
0.392 + j 0.296
|
|
500
|
0.034 + j 0.079
|
0.334 + j 0.266
|
0.028 + j 0.033
|
0.369 + j 0.262
|
|
750
|
0.026 + j 0.075
|
0.314 + j 0.228
|
0.020 + j 0.031
|
0.342 + j 0.222
|
|
1000
|
0.022 + j 0.071
|
0.298 + j 0.198
|
0.016 + j 0.031
|
0.320 + j 0.192
|
|
1250
|
0.019 + j 0.070
|
0.285 + j 0.181
|
0.014 + j 0.032
|
0.304 + j 0.174
|
|
1500
|
0.018 + j 0.066
|
0.275 + j 0.164
|
0.012 + j 0.029
|
0.292 + j 0.157
|
|
1750
|
0.017 + j 0.064
|
0.267 + j 0.152
|
0.011 + j 0.029
|
0.282 + j 0.145
|
|
2000
|
0.016 + j 0.062
|
0.259 + j 0.142
|
0.010 + j 0.028
|
0.273 + j 0.135
|
Assumptions:
(1)
Single conductor cables horizontally spaced 8" on center
(2) Three conductor cables paralleled or triplexed
(3) Perfect transposition of phase conductors
(4) Cables supply balanced load |
(5)
90°C conductor temperature (45°C shield temperature)
(6) Shield consists of 5 mil copper tape
(7) 100 meter-ohm earth
(8) Current returns in earth and shield as applicable. |
CABLE
SEQUENCE IMPEDANCE DATA
Three
Phase — Copper Conductors — ohms/1,000 ft.
15kV
| |
Three
1/C Cables
|
3/C
Cable
|
Size
(AWG/kcmil)
|
Positive/Negative
|
Zero
Sequence |
Positive/Negative |
Zero
Sequence |
|
2
|
0.210
+ j 0.104
|
0.518
+ j 0.399
|
0.204
+ j 0.048
|
0.577
+ j 0.414
|
|
1
|
0.168
+ j 0.100
|
0.477
+ j 0.384
|
0.162
+ j 0.046
|
0.534
+ j 0.396
|
|
1/0
|
0.134
+ j 0.097
|
0.444
+ j 0.370
|
0.128
+ j 0.044
|
0.499
+ j 0.379
|
|
2/0
|
0.108
+ j 0.095
|
0.418
+ j 0.355
|
0.102
+ j 0.042
|
0.470
+ j 0.362
|
|
3/0
|
0.087
+ j 0.092
|
0.397
+ j 0.339
|
0.081
+ j 0.041
|
0.445
+ j 0.344
|
|
4/0
|
0.071
+ j 0.089
|
0.379
+ j 0.323
|
0.064
+ j 0.039
|
0.424
+ j 0.325
|
|
250
|
0.061
+ j 0.087
|
0.367
+ j 0.302
|
0.055
+ j 0.038
|
0.408
+ j 0.302
|
|
350
|
0.046
+ j 0.083
|
0.347
+ j 0.277
|
0.040
+ j 0.036
|
0.384
+ j 0.274
|
|
500
|
0.035
+ j 0.079
|
0.329
+ j 0.248
|
0.028
+ j 0.035
|
0.360
+ j 0.243
|
|
750
|
0.026
+ j 0.074
|
0.308
+ j 0.213
|
0.020
+ j 0.033
|
0.333
+ j 0.207
|
|
1000
|
0.022
+ j 0.071
|
0.291
+ j 0.187
|
0.016
+ j 0.032
|
0.311
+ j 0.180
|
|
1250
|
0.019
+ j 0.070
|
0.279
+ j 0.171
|
0.013
+ j 0.033
|
0.296
+ j 0.164
|
|
1500
|
0.018
+ j 0.066
|
0.269
+ j 0.155
|
0.012
+ j 0.030
|
0.284
+ j 0.148
|
|
1750
|
0.017
+ j 0.064
|
0.260
+ j 0.144
|
0.011
+ j 0.030
|
0.274
+ j 0.137
|
|
2000
|
0.016
+ j 0.062
|
0.253
+ j 0.135
|
0.010
+ j 0.029
|
0.265
+ j 0.128
|
25kV
| 1 |
0.168
+ j 0.100 |
0.478
+ j 0.360 |
0.162
+ j 0.048 |
0.529
+ j 0.366 |
| 1/0 |
0.134
+ j 0.097 |
0.444
+ j 0.347 |
0.128
+ j 0.046 |
0.493
+ j 0.351 |
| 2/0 |
0.108
+ j 0.095 |
0.417
+ j 0.333 |
0.102
+ j 0.044 |
0.463
+ j 0.335 |
| 3/0 |
0.087
+ j 0.092 |
0.394
+ j 0.313 |
0.081
+ j 0.043 |
0.437
+ j 0.314 |
| 4/0 |
0.071
+ j 0.089 |
0.376
+ j 0.298 |
0.064
+ j 0.041 |
0.415
+ j 0.297 |
| 250 |
0.061
+ j 0.087 |
0.363
+ j 0.284 |
0.055
+ j 0.040 |
0.400
+ j 0.281 |
| 350 |
0.046
+ j 0.083 |
0.343
+ j 0.260 |
0.040
+ j 0.038 |
0.375
+ j 0.255 |
| 500 |
0.035
+ j 0.079 |
0.323
+ j 0.234 |
0.028
+ j 0.036 |
0.351
+ j 0.228 |
| 750 |
0.026
+ j 0.074 |
0.300
+ j 0.198 |
0.020
+ j 0.034 |
0.321
+ j 0.191 |
| 1000 |
0.022
+ j 0.071 |
0.285
+ j 0.177 |
0.016
+ j 0.033 |
0.303
+ j 0.170 |
| 1250 |
0.019
+ j 0.070 |
0.273
+ j 0.162 |
0.013
+ j 0.034 |
0.288
+ j 0.155 |
| 1500 |
0.018
+ j 0.066 |
0.263
+ j 0.148 |
0.012
+ j 0.031 |
0.277
+ j 0.141 |
| 1750 |
0.017
+ j 0.064 |
0.255
+ j 0.137 |
0.011
+ j 0.031 |
0.267
+ j 0.131 |
| 2000 |
0.016
+ j 0.062 |
0.247
+ j 0.129 |
0.010
+ j 0.030 |
0.258
+ j 0.123 |
35kV
| 1/0 |
0.135
+ j 0.097 |
0.438
+ j 0.298 |
0.128
+ j 0.050 |
0.476
+ j 0.296 |
| 2/0 |
0.109
+ j 0.095 |
0.400
+ j 0.286 |
0.102
+ j 0.048 |
0.445
+ j 0.283 |
| 3/0 |
0.088
+ j 0.092 |
0.386
+ j 0.274 |
0.081
+ j 0.046 |
0.419
+ j 0.270 |
| 4/0 |
0.071
+ j 0.089 |
0.366
+ j 0.261 |
0.064
+ j 0.045 |
0.397
+ j 0.256 |
| 250 |
0.061
+ j 0.087 |
0.353
+ j 0.248 |
0.055
+ j 0.043 |
0.382
+ j 0.244 |
| 350 |
0.046
+ j 0.083 |
0.331
+ j 0.229 |
0.040
+ j 0.041 |
0.357
+ j 0.223 |
| 500 |
0.035
+ j 0.079 |
0.309
+ j 0.203 |
0.028
+ j 0.039 |
0.330
+ j 0.196 |
| 750 |
0.026
+ j 0.074 |
0.286
+ j 0.175 |
0.020
+ j 0.037 |
0.302
+ j 0.168 |
| 1000 |
0.022
+ j 0.071 |
0.271
+ j 0.157 |
0.016
+ j 0.036 |
0.285
+ j 0.151 |
| 1250 |
0.019
+ j 0.070 |
0.259
+ j 0.145 |
0.013
+ j 0.035 |
0.271
+ j 0.139 |
| 1500 |
0.018
+ j 0.066 |
0.250
+ j 0.133 |
0.012
+ j 0.033 |
0.261
+ j 0.127 |
| 1750 |
0.017
+ j 0.064 |
0.242
+ j 0.124 |
0.011
+ j 0.033 |
0.252
+ j 0.118 |
| 2000 |
0.016
+ j 0.062 |
0.235
+ j 0.117 |
0.010
+ j 0.032 |
0.244
+ j 0.111 |
CABLE SEQUENCE IMPEDANCE
DATA
Three Phase — Copper
Conductors — ohms/1,000 ft.
46kV
| |
Three
1/C Cables |
3/C
Cable |
Size
(AWG/kcmil) |
Positive/Negative |
Zero
Sequence |
Positive/Negative |
Zero
Sequence |
| 4/0 |
0.071
+ j 0.089 |
0.357
+ j 0.237 |
0.065
+ j 0.047 |
0.383
+ j 0.231 |
| 250 |
0.062
+ j 0.087 |
0.344
+ j 0.226 |
0.055
+ j 0.045 |
0.368
+ j 0.220 |
| 350 |
0.046
+ j 0.083 |
0.321
+ j 0.209 |
0.040
+ j 0.043 |
0.343
+ j 0.202 |
| 500 |
0.035
+ j 0.079 |
0.301
+ j 0.189 |
0.028
+ j 0.041 |
0.319
+ j 0.182 |
| 750 |
0.026
+ j 0.074 |
0.278
+ j 0.164 |
0.020
+ j 0.038 |
0.292
+ j 0.157 |
| 1000 |
0.022
+ j 0.071 |
0.263
+ j 0.148 |
0.016
+ j 0.037 |
0.276
+ j 0.141 |
| 1250 |
0.020
+ j 0.070 |
0.251
+ j 0.137 |
0.013
+ j 0.038 |
0.262
+ j 0.131 |
| 1500 |
0.018
+ j 0.066 |
0.243
+ j 0.125 |
0.012
+ j 0.034 |
0.252
+ j 0.120 |
| 1750 |
0.017
+ j 0.064 |
0.235
+ j 0.117 |
0.011
+ j 0.034 |
0.244
+ j 0.112 |
| 2000 |
0.016
+ j 0.062 |
0.228
+ j 0.111 |
0.010
+ j 0.033 |
0.236
+ j 0.106 |
69kV
| |
Three
1/C Cables |
3/C Cable |
Size
(AWG/kcmil) |
Positive/Negative |
Zero
Sequence |
Positive/Negative |
Zero
Sequence |
| 4/0 |
0.071
+ j 0.089 |
0.337
+ j 0.199 |
0.065
+ j 0.051 |
0.355
+ j 0.192 |
| 250 |
0.062
+ j 0.087 |
0.324
+ j 0.191 |
0.055
+ j 0.049 |
0.341
+ j 0.184 |
| 350 |
0.046
+ j 0.083 |
0.301
+ j 0.177 |
0.040
+ j 0.047 |
0.316
+ j 0.170 |
| 500 |
0.035
+ j 0.079 |
0.281
+ j 0.161 |
0.028
+ j 0.044 |
0.294
+ j 0.155 |
| 750 |
0.026
+ j 0.074 |
0.259
+ j 0.141 |
0.020
+ j 0.041 |
0.269
+ j 0.135 |
| 1000 |
0.022
+ j 0.070 |
0.245
+ j 0.129 |
0.016
+ j 0.041 |
0.254
+ j 0.123 |
| 1250 |
0.020
+ j 0.070 |
0.234
+ j 0.121 |
0.013
+ j 0.041 |
0.242
+ j 0.115 |
| 1500 |
0.018
+ j 0.066 |
0.226
+ j 0.111 |
0.012
+ j 0.037 |
0.233
+ j 0.106 |
| 1750 |
0.017
+ j 0.064 |
0.219
+ j 0.104 |
0.011
+ j 0.036 |
0.225
+ j 0.099 |
| 2000 |
0.016
+ j 0.062 |
0.213
+ j 0.099 |
0.010
+ j 0.035 |
0.219
+ j 0.094 |
115kV
| |
Three
1/C Cables |
3/C
Cable |
Size
(AWG/kcmil) |
Positive/Negative |
Zero
Sequence |
Positive/Negative |
Zero
Sequence |
| 500 |
0.035
+ j 0.079 |
0.248
+ j 0.127 |
0.028
+ j 0.049 |
0.255
+ j 0.122 |
| 750 |
0.026
+ j 0.074 |
0.228
+ j 0.113 |
0.020
+ j 0.046 |
0.234
+ j 0.109 |
| 1000 |
0.022
+ j 0.070 |
0.216
+ j 0.105 |
0.016
+ j 0.044 |
0.221
+ j 0.100 |
| 1250 |
0.019
+ j 0.070 |
0.206
+ j 0.100 |
0.013
+ j 0.045 |
0.211
+ j 0.096 |
| 1500 |
0.018
+ j 0.066 |
0.199
+ j 0.092 |
0.012
+ j 0.041 |
0.204
+ j 0.088 |
138kV
| |
Three
1/C Cables |
3/C
Cable |
Size
(AWG/kcmil) |
Positive/Negative |
Zero
Sequence |
Positive/Negative |
Zero
Sequence
|
|
500
|
0.035
+ j 0.078
|
0.231
+ j 0.114
|
0.029
+ j 0.052
|
0.236
+ j 0.110
|
|
750
|
0.026 + j 0.074
|
0.212 + j 0.102
|
0.020 + j 0.048
|
0.216 + j 0.099
|
|
1000
|
0.022
+ j 0.070
|
0.201
+ j 0.095
|
0.016
+ j 0.046
|
0.205
+ j 0.091
|
|
1250
|
0.019 + j 0.070
|
0.192 + j 0.091
|
0.014 + j 0.047
|
0.196 + j 0.088
|
|
1500
|
0.018
+ j 0.066
|
0.186
+ j 0.084
|
0.012
+ j 0.043
|
0.189
+ j 0.081
|
Assumptions:
(1)
Single conductor cables horizontally spaced 8" on center
(2) Three conductor cables paralleled or triplexed
(3) Perfect transposition of phase conductors
(4) Cables supply balanced load |
(5)
90°C conductor temperature (45°C shield temperature)
(6) Shield consists of 5 mil copper tape
(7) 100 meter-ohm earth
(8) Current returns in earth and shield as applicable. |
|