550 Volt Primary Single Phase Isolation Transformers

C. 550 Volt Primary Single Phase Isolation Transformers

TEMCo Single Phase Isolation Transformers are 50/60 Hz rated and come in a NEMA 3R enclosure for indoor use as well as outdoor protection against rain and sleet. Our transformers are built to last, guaranteed. That's why we back these with a decade long warranty.

• UL Listed, CSA Approved
• Aluminum or Copper windings
• 50/60 Hz rated
• NEMA 3R Enclosure (for indoor or outdoor use)

Looking for a different specification? See all the primary voltage configurations here.

Select a Different Primary Configuration »

Secondary Voltages Selection
1. 600 15. 277
2. 575 16. 240
3. 550 17. 120/240
4. 480 18. 230
5. 240/480 19. 115/230
6. 460 20. 220
7. 230/460 21. 110/220
8. 440 22. 208
9. 220/440 23. 200
10. 416 24. 190
11. 208/416 25. 120
12. 400 26. 115
13. 380 27. 110
14. 347 28. 100

1. 550V Primary - 600 Secondary

kVA Output Amps Aluminum Copper
3 5 - T28088
5 8.33 - T28089
7.5 12.5 - T28090
10 16.67 T17101 T28091
15 25 T17102 T28092
25 41.67 T17103 T28093
37.5 62.5 T17104 T28094
50 83.33 T17105 T28095
75 125 T17106 T28096
100 166.67 T17107 T28097
167 278.33 T17108 T28098
200 333.33 T17109 T28099
250 416.67 T17110 T28100
330 550 T17111 T28101

2. 550V Primary - 575 Secondary

kVA Output Amps Aluminum Copper
3 5.22 - T28102
5 8.70 - T28103
7.5 13.04 - T28104
10 17.39 T17115 T28105
15 26.09 T17116 T28106
25 43.48 T17117 T28107
37.5 65.22 T17118 T28108
50 86.96 T17119 T28109
75 130.43 T17120 T28110
100 173.91 T17121 T28111
167 290.43 T17122 T28112
200 347.83 T17123 T28113
250 434.78 T17124 T28114
330 573.91 T17125 T28115

3. 550V Primary - 550 Secondary

kVA Output Amps Aluminum Copper
3 5.45 - T28116
5 9.09 - T28117
7.5 13.64 - T28118
10 18.18 T17129 T28119
15 27.27 T17130 T28120
25 45.45 T17131 T28121
37.5 68.18 T17132 T28122
50 90.91 T17133 T28123
75 136.36 T17134 T28124
100 181.82 T17135 T28125
167 303.64 T17136 T28126
200 363.64 T17137 T28127
250 454.55 T17138 T28128
330 600 T17139 T28129

4. 550V Primary - 480 Secondary

kVA Output Amps Aluminum Copper
3 6.25 - T28130
5 10.42 - T28131
7.5 15.63 - T28132
10 20.83 T17143 T28133
15 31.25 T17144 T28134
25 52.08 T17145 T28135
37.5 78.13 T17146 T28136
50 104.17 T17147 T28137
75 156.25 T17148 T28138
100 208.33 T17149 T28139
167 347.92 T17150 T28140
200 416.67 T17151 T28141
250 520.83 T17152 T28142
330 687.50 T17153 T28143

5. 550V Primary - 240/480 Secondary

kVA Output Amps Aluminum Copper
3 12.5/6.25 - T28144
5 20.83/10.42 - T28145
7.5 31.25/15.63 - T28146
10 41.67/20.83 T17157 T28147
15 62.5/31.25 T17158 T28148
25 104.17/52.08 T17159 T28149
37.5 156.25/78.13 T17160 T28150
50 208.33/104.17 T17161 T28151
75 312.5/156.25 T17162 T28152
100 416.67/208.33 T17163 T28153
167 695.83/347.92 T17164 T28154
200 833.33/416.67 T17165 T28155
250 1041.67/520.83 T17166 T28156
330 1375/687.5 T17167 T28157

6. 550V Primary - 460 Secondary

kVA Output Amps Aluminum Copper
3 6.52 - T28158
5 10.87 - T28159
7.5 16.30 - T28160
10 21.74 T17171 T28161
15 32.61 T17172 T28162
25 54.35 T17173 T28163
37.5 81.52 T17174 T28164
50 108.70 T17175 T28165
75 163.04 T17176 T28166
100 217.39 T17177 T28167
167 363.04 T17178 T28168
200 434.78 T17179 T28169
250 543.48 T17180 T28170
330 717.39 T17181 T28171

7. 550V Primary - 230/460 Secondary

kVA Output Amps Aluminum Copper
3 13.04/6.52 - T28172
5 21.74/10.87 - T28173
7.5 32.61/16.3 - T28174
10 43.48/21.74 T17185 T28175
15 65.22/32.61 T17186 T28176
25 108.7/54.35 T17187 T28177
37.5 163.04/81.52 T17188 T28178
50 217.39/108.7 T17189 T28179
75 326.09/163.04 T17190 T28180
100 434.78/217.39 T17191 T28181
167 726.09/363.04 T17192 T28182
200 869.57/434.78 T17193 T28183
250 1086.96/543.48 T17194 T28184
330 1434.78/717.39 T17195 T28185

8. 550V Primary - 440 Secondary

kVA Output Amps Aluminum Copper
3 6.82 - T28186
5 11.36 - T28187
7.5 17.05 - T28188
10 22.73 T17199 T28189
15 34.09 T17200 T28190
25 56.82 T17201 T28191
37.5 85.23 T17202 T28192
50 113.64 T17203 T28193
75 170.45 T17204 T28194
100 227.27 T17205 T28195
167 379.55 T17206 T28196
200 454.55 T17207 T28197
250 568.18 T17208 T28198
330 750 T17209 T28199

9. 550V Primary - 220/440 Secondary

kVA Output Amps Aluminum Copper
3 13.64/6.82 - T28200
5 22.73/11.36 - T28201
7.5 34.09/17.05 - T28202
10 45.45/22.73 T17213 T28203
15 68.18/34.09 T17214 T28204
25 113.64/56.82 T17215 T28205
37.5 170.45/85.23 T17216 T28206
50 227.27/113.64 T17217 T28207
75 340.91/170.45 T17218 T28208
100 454.55/227.27 T17219 T28209
167 759.09/379.55 T17220 T28210
200 909.09/454.55 T17221 T28211
250 1136.36/568.18 T17222 T28212
330 1500/750 T17223 T28213

10. 550V Primary - 416 Secondary

kVA Output Amps Aluminum Copper
3 7.21 - T28214
5 12.02 - T28215
7.5 18.03 - T28216
10 24.04 T17227 T28217
15 36.06 T17228 T28218
25 60.10 T17229 T28219
37.5 90.14 T17230 T28220
50 120.19 T17231 T28221
75 180.29 T17232 T28222
100 240.38 T17233 T28223
167 401.44 T17234 T28224
200 480.77 T17235 T28225
250 600.96 T17236 T28226
330 793.27 T17237 T28227

11. 550V Primary - 208/416 Secondary

kVA Output Amps Aluminum Copper
3 14.42/7.21 - T28228
5 24.04/12.02 - T28229
7.5 36.06/18.03 - T28230
10 48.08/24.04 T17241 T28231
15 72.12/36.06 T17242 T28232
25 120.19/60.1 T17243 T28233
37.5 180.29/90.14 T17244 T28234
50 240.38/120.19 T17245 T28235
75 360.58/180.29 T17246 T28236
100 480.77/240.38 T17247 T28237
167 802.88/401.44 T17248 T28238
200 961.54/480.77 T17249 T28239
250 1201.92/600.96 T17250 T28240
330 1586.54/793.27 T17251 T28241

12. 550V Primary - 400 Secondary

kVA Output Amps Aluminum Copper
3 7.5 - T28242
5 12.5 - T28243
7.5 18.75 - T28244
10 25 T17255 T28245
15 37.5 T17256 T28246
25 62.5 T17257 T28247
37.5 93.75 T17258 T28248
50 125 T17259 T28249
75 187.5 T17260 T28250
100 250 T17261 T28251
167 417.5 T17262 T28252
200 500 T17263 T28253
250 625 T17264 T28254
330 825 T17265 T28255

13. 550V Primary - 380 Secondary

kVA Output Amps Aluminum Copper
3 7.89 - T28256
5 13.16 - T28257
7.5 19.74 - T28258
10 26.32 T17269 T28259
15 39.47 T17270 T28260
25 65.79 T17271 T28261
37.5 98.68 T17272 T28262
50 131.58 T17273 T28263
75 197.37 T17274 T28264
100 263.16 T17275 T28265
167 439.47 T17276 T28266
200 526.32 T17277 T28267
250 657.89 T17278 T28268
330 868.42 T17279 T28269

14. 550V Primary - 347 Secondary

kVA Output Amps Aluminum Copper
3 8.65 - T28270
5 14.41 - T28271
7.5 21.61 - T28272
10 28.82 T17283 T28273
15 43.23 T17284 T28274
25 72.05 T17285 T28275
37.5 108.07 T17286 T28276
50 144.09 T17287 T28277
75 216.14 T17288 T28278
100 288.18 T17289 T28279
167 481.27 T17290 T28280
200 576.37 T17291 T28281
250 720.46 T17292 T28282
330 951.01 T17293 T28283

15. 550V Primary - 277 Secondary

kVA Output Amps Aluminum Copper
3 10.83 - T28284
5 18.05 - T28285
7.5 27.08 - T28286
10 36.10 T17297 T28287
15 54.15 T17298 T28288
25 90.25 T17299 T28289
37.5 135.38 T17300 T28290
50 180.51 T17301 T28291
75 270.76 T17302 T28292
100 361.01 T17303 T28293
167 602.89 T17304 T28294
200 722.02 T17305 T28295
250 902.53 T17306 T28296
330 1191.34 T17307 T28297

16. 550V Primary - 240 Secondary

kVA Output Amps Aluminum Copper
3 12.5 - T28298
5 20.83 - T28299
7.5 31.25 - T28300
10 41.67 T17311 T28301
15 62.5 T17312 T28302
25 104.17 T17313 T28303
37.5 156.25 T17314 T28304
50 208.33 T17315 T28305
75 312.5 T17316 T28306
100 416.67 T17317 T28307
167 695.83 T17318 T28308
200 833.33 T17319 T28309
250 1041.67 T17320 T28310
330 1375 T17321 T28311

17. 550V Primary - 120/240 Secondary

kVA Output Amps Aluminum Copper
3 25/12.5 - T28312
5 41.67/20.83 - T28313
7.5 62.5/31.25 - T28314
10 83.33/41.67 T17325 T28315
15 125/62.5 T17326 T28316
25 208.33/104.17 T17327 T28317
37.5 312.5/156.25 T17328 T28318
50 416.67/208.33 T17329 T28319
75 625/312.5 T17330 T28320
100 833.33/416.67 T17331 T28321
167 1391.67/695.83 T17332 T28322
200 1666.67/833.33 T17333 T28323
250 2083.33/1041.67 T17334 T28324
330 2750/1375 T17335 T28325

18. 550V Primary - 230 Secondary

kVA Output Amps Aluminum Copper
3 13.04 - T28326
5 21.74 - T28327
7.5 32.61 - T28328
10 43.48 T17339 T28329
15 65.22 T17340 T28330
25 108.70 T17341 T28331
37.5 163.04 T17342 T28332
50 217.39 T17343 T28333
75 326.09 T17344 T28334
100 434.78 T17345 T28335
167 726.09 T17346 T28336
200 869.57 T17347 T28337
250 1086.96 T17348 T28338
330 1434.78 T17349 T28339

19. 550V Primary - 115/230 Secondary

kVA Output Amps Aluminum Copper
3 26.09/13.04 - T28340
5 43.48/21.74 - T28341
7.5 65.22/32.61 - T28342
10 86.96/43.48 T17353 T28343
15 130.43/65.22 T17354 T28344
25 217.39/108.7 T17355 T28345
37.5 326.09/163.04 T17356 T28346
50 434.78/217.39 T17357 T28347
75 652.17/326.09 T17358 T28348
100 869.57/434.78 T17359 T28349
167 1452.17/726.09 T17360 T28350
200 1739.13/869.57 T17361 T28351
250 2173.91/1086.96 T17362 T28352
330 2869.57/1434.78 T17363 T28353

20. 550V Primary - 220 Secondary

kVA Output Amps Aluminum Copper
3 13.64 - T28354
5 22.73 - T28355
7.5 34.09 - T28356
10 45.45 T17367 T28357
15 68.18 T17368 T28358
25 113.64 T17369 T28359
37.5 170.45 T17370 T28360
50 227.27 T17371 T28361
75 340.91 T17372 T28362
100 454.55 T17373 T28363
167 759.09 T17374 T28364
200 909.09 T17375 T28365
250 1136.36 T17376 T28366
330 1500 T17377 T28367

21. 550V Primary - 110/220 Secondary

kVA Output Amps Aluminum Copper
3 27.27/13.64 - T28368
5 45.45/22.73 - T28369
7.5 68.18/34.09 - T28370
10 90.91/45.45 T17381 T28371
15 136.36/68.18 T17382 T28372
25 227.27/113.64 T17383 T28373
37.5 340.91/170.45 T17384 T28374
50 454.55/227.27 T17385 T28375
75 681.82/340.91 T17386 T28376
100 909.09/454.55 T17387 T28377
167 1518.18/759.09 T17388 T28378
200 1818.18/909.09 T17389 T28379
250 2272.73/1136.36 T17390 T28380
330 3000/1500 T17391 T28381

22. 550V Primary - 208 Secondary

kVA Output Amps Aluminum Copper
3 14.42 - T28382
5 24.04 - T28383
7.5 36.06 - T28384
10 48.08 T17395 T28385
15 72.12 T17396 T28386
25 120.19 T17397 T28387
37.5 180.29 T17398 T28388
50 240.38 T17399 T28389
75 360.58 T17400 T28390
100 480.77 T17401 T28391
167 802.88 T17402 T28392
200 961.54 T17403 T28393
250 1201.92 T17404 T28394
330 1586.54 T17405 T28395

23. 550V Primary - 200 Secondary

kVA Output Amps Aluminum Copper
3 15 - T28396
5 25 - T28397
7.5 37.5 - T28398
10 50 T17409 T28399
15 75 T17410 T28400
25 125 T17411 T28401
37.5 187.5 T17412 T28402
50 250 T17413 T28403
75 375 T17414 T28404
100 500 T17415 T28405
167 835 T17416 T28406
200 1000 T17417 T28407
250 1250 T17418 T28408
330 1650 T17419 T28409

24. 550V Primary - 190 Secondary

kVA Output Amps Aluminum Copper
3 15.79 - T28410
5 26.32 - T28411
7.5 39.47 - T28412
10 52.63 T17423 T28413
15 78.95 T17424 T28414
25 131.58 T17425 T28415
37.5 197.37 T17426 T28416
50 263.16 T17427 T28417
75 394.74 T17428 T28418
100 526.32 T17429 T28419
167 878.95 T17430 T28420
200 1052.63 T17431 T28421
250 1315.79 T17432 T28422
330 1736.84 T17433 T28423

25. 550V Primary - 120 Secondary

kVA Output Amps Aluminum Copper
3 25 - T28424
5 41.67 - T28425
7.5 62.5 - T28426
10 83.33 T17437 T28427
15 125 T17438 T28428
25 208.33 T17439 T28429
37.5 312.5 T17440 T28430
50 416.67 T17441 T28431
75 625 T17442 T28432
100 833.33 T17443 T28433
167 1391.67 T17444 T28434
200 1666.67 T17445 T28435
250 2083.33 T17446 T28436
330 2750 T17447 T28437

26. 550V Primary - 115 Secondary

kVA Output Amps Aluminum Copper
3 26.09 - T28438
5 43.48 - T28439
7.5 65.22 - T28440
10 86.96 T17451 T28441
15 130.43 T17452 T28442
25 217.39 T17453 T28443
37.5 326.09 T17454 T28444
50 434.78 T17455 T28445
75 652.17 T17456 T28446
100 869.57 T17457 T28447
167 1452.17 T17458 T28448
200 1739.13 T17459 T28449
250 2173.91 T17460 T28450
330 2869.57 T17461 T28451

27. 550V Primary - 110 Secondary

kVA Output Amps Aluminum Copper
3 27.27 - T28452
5 45.45 - T28453
7.5 68.18 - T28454
10 90.91 T17465 T28455
15 136.36 T17466 T28456
25 227.27 T17467 T28457
37.5 340.91 T17468 T28458
50 454.55 T17469 T28459
75 681.82 T17470 T28460
100 909.09 T17471 T28461
167 1518.18 T17472 T28462
200 1818.18 T17473 T28463
250 2272.73 T17474 T28464
330 3000 T17475 T28465

28. 550V Primary - 100 Secondary

kVA Output Amps Aluminum Copper
3 30 - T28466
5 50 - T28467
7.5 75 - T28468
10 100 T17479 T28469
15 150 T17480 T28470
25 250 T17481 T28471
37.5 375 T17482 T28472
50 500 T17483 T28473
75 750 T17484 T28474
100 1000 T17485 T28475
167 1670 T17486 T28476
200 2000 T17487 T28477
250 2500 T17488 T28478
330 3300 T17489 T28479