H. 400 Volt Primary Three Phase Isolation Transformers
TEMCo Three 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. 600Y/347 | 12. 230Y/133 |
| 2. 575Y/330 | 13. 220Y/127 |
| 3. 550Y/316 | 14. 216 Delta |
| 4. 480Y/277 | 15. 208Y/120 |
| 5. 460 Delta | 16. 200Y/115 |
| 6. 440 Delta | 17. 190Y/110 |
| 7. 416Y/240 | 18. 120 Delta |
| 8. 400Y/230 | 19. 115 Delta |
| 9. 380Y/220 | 20. 110 Delta |
| 10. 240Y/139 | 21. 100 Delta |
| 11. 240CTD/120 | |
1. 400V Primary - 600Y/347 Secondary
| kVA | Output Amps | Aluminum | Copper |
| 3 | 2.89 | - | T45865 |
| 6 | 5.77 | - | T45866 |
| 9 | 8.66 | - | T45867 |
| 15 | 14.43 | T40384 | T45868 |
| 30 | 28.87 | T40385 | T45869 |
| 45 | 43.30 | T40386 | T45870 |
| 75 | 72.17 | T40387 | T45871 |
| 112.5 | 108.26 | T40388 | T45872 |
| 150 | 144.34 | T40389 | T45873 |
| 225 | 216.51 | T40390 | T45874 |
| 300 | 288.68 | T40391 | T45875 |
| 450 | 433.03 | T40392 | T45876 |
| 500 | 481.14 | T40393 | T45877 |
| 600 | 577.37 | T40394 | T45878 |
| 750 | 721.71 | T40395 | T45879 |
2. 400V Primary - 575Y/230 Secondary
| kVA | Output Amps | Aluminum | Copper |
| 3 | 3.01 | - | T45880 |
| 6 | 6.02 | - | T45881 |
| 9 | 9.04 | - | T45882 |
| 15 | 15.06 | T40396 | T45883 |
| 30 | 30.12 | T40397 | T45884 |
| 45 | 45.19 | T40398 | T45885 |
| 75 | 75.31 | T40399 | T45886 |
| 112.5 | 112.96 | T40400 | T45887 |
| 150 | 150.62 | T40401 | T45888 |
| 225 | 225.93 | T40402 | T45889 |
| 300 | 301.24 | T40403 | T45890 |
| 450 | 451.85 | T40404 | T45891 |
| 500 | 502.06 | T40405 | T45892 |
| 600 | 602.47 | T40406 | T45893 |
| 750 | 753.09 | T40407 | T45894 |
3. 400V Primary - 550Y/316 Secondary
| kVA | Output Amps | Aluminum | Copper |
| 3 | 3.15 | - | Contact |
| 6 | 6.30 | - | Contact |
| 9 | 9.45 | - | Contact |
| 15 | 15.75 | Contact | Contact |
| 30 | 31.49 | Contact | Contact |
| 45 | 47.24 | Contact | Contact |
| 75 | 78.73 | Contact | Contact |
| 112.5 | 118.10 | Contact | Contact |
| 150 | 157.46 | Contact | Contact |
| 225 | 236.20 | Contact | Contact |
| 300 | 314.93 | Contact | Contact |
| 450 | 472.39 | Contact | Contact |
| 500 | 524.88 | Contact | Contact |
| 600 | 629.86 | Contact | Contact |
| 750 | 787.32 | Contact | Contact |
4. 400V Primary - 480Y/277 Secondary
| kVA | Output Amps | Aluminum | Copper |
| 3 | 3.61 | - | T45910 |
| 6 | 7.22 | - | T45911 |
| 9 | 10.83 | - | T45912 |
| 15 | 18.04 | T40420 | T45913 |
| 30 | 36.09 | T40421 | T45914 |
| 45 | 54.13 | T40422 | T45915 |
| 75 | 90.21 | T40423 | T45916 |
| 112.5 | 135.32 | T40424 | T45917 |
| 150 | 180.43 | T40425 | T45918 |
| 225 | 270.64 | T40426 | T45919 |
| 300 | 360.85 | T40427 | T45920 |
| 450 | 541.28 | T40428 | T45921 |
| 500 | 601.42 | T40429 | T45922 |
| 600 | 721.71 | T40430 | T45923 |
| 750 | 902.14 | T40431 | T45924 |
5. 400V Primary - 460V Delta Secondary
| kVA | Output Amps | Aluminum | Copper |
| 3 | 3.77 | - | T45925 |
| 6 | 7.53 | - | T45926 |
| 9 | 11.30 | - | T45927 |
| 15 | 18.83 | T40432 | T45928 |
| 30 | 37.65 | T40433 | T45929 |
| 45 | 56.48 | T40434 | T45930 |
| 75 | 94.14 | T40435 | T45931 |
| 112.5 | 141.20 | T40436 | T45932 |
| 150 | 188.27 | T40437 | T45933 |
| 225 | 282.41 | T40438 | T45934 |
| 300 | 376.54 | T40439 | T45935 |
| 450 | 564.82 | T40440 | T45936 |
| 500 | 627.57 | T40441 | T45937 |
| 600 | 753.09 | T40442 | T45938 |
| 750 | 941.36 | T40443 | T45939 |
6. 400V Primary - 440V Delta Secondary
| kVA | Output Amps | Aluminum | Copper |
| 3 | 3.94 | - | T45940 |
| 6 | 7.87 | - | T45941 |
| 9 | 11.81 | - | T45942 |
| 15 | 19.68 | T40444 | T45943 |
| 30 | 39.37 | T40445 | T45944 |
| 45 | 59.05 | T40446 | T45945 |
| 75 | 98.41 | T40447 | T45946 |
| 112.5 | 147.62 | T40448 | T45947 |
| 150 | 196.83 | T40449 | T45948 |
| 225 | 295.24 | T40450 | T45949 |
| 300 | 393.66 | T40451 | T45950 |
| 450 | 590.49 | T40452 | T45951 |
| 500 | 656.10 | T40453 | T45952 |
| 600 | 787.32 | T40454 | T45953 |
| 750 | 984.15 | T40455 | T45954 |
7. 400V Primary - 416Y/240 Secondary
| kVA | Output Amps | Aluminum | Copper |
| 3 | 4.16 | - | T45955 |
| 6 | 8.33 | - | T45956 |
| 9 | 12.49 | - | T45957 |
| 15 | 20.82 | T40456 | T45958 |
| 30 | 41.64 | T40457 | T45959 |
| 45 | 62.46 | T40458 | T45960 |
| 75 | 104.09 | T40459 | T45961 |
| 112.5 | 156.14 | T40460 | T45962 |
| 150 | 208.19 | T40461 | T45963 |
| 225 | 312.28 | T40462 | T45964 |
| 300 | 416.37 | T40463 | T45965 |
| 450 | 624.56 | T40464 | T45966 |
| 500 | 693.95 | T40465 | T45967 |
| 600 | 832.74 | T40466 | T45968 |
| 750 | 1040.93 | T40467 | T45969 |
8. 400V Primary - 400Y/230 Secondary
| kVA | Output Amps | Aluminum | Copper |
| 3 | 4.33 | - | T45970 |
| 6 | 8.66 | - | T45971 |
| 9 | 12.99 | - | T45972 |
| 15 | 21.65 | T40468 | T45973 |
| 30 | 43.30 | T40469 | T45974 |
| 45 | 64.95 | T40470 | T45975 |
| 75 | 108.26 | T40471 | T45976 |
| 112.5 | 162.38 | T40472 | T45977 |
| 150 | 216.51 | T40473 | T45978 |
| 225 | 324.77 | T40474 | T45979 |
| 300 | 433.03 | T40475 | T45980 |
| 450 | 649.54 | T40476 | T45981 |
| 500 | 721.71 | T40477 | T45982 |
| 600 | 866.05 | T40478 | T45983 |
| 750 | 1082.56 | T40479 | T45984 |
9. 400V Primary - 380Y/220 Secondary
| kVA | Output Amps | Aluminum | Copper |
| 3 | 4.56 | - | T45985 |
| 6 | 9.12 | - | T45986 |
| 9 | 13.67 | - | T45987 |
| 15 | 22.79 | T40480 | T45988 |
| 30 | 45.58 | T40481 | T45989 |
| 45 | 68.37 | T40482 | T45990 |
| 75 | 113.95 | T40483 | T45991 |
| 112.5 | 170.93 | T40484 | T45992 |
| 150 | 227.91 | T40485 | T45993 |
| 225 | 341.86 | T40486 | T45994 |
| 300 | 455.82 | T40487 | T45995 |
| 450 | 683.72 | T40488 | T45996 |
| 500 | 759.69 | T40489 | T45997 |
| 600 | 911.63 | T40490 | T45998 |
| 750 | 1139.54 | T40491 | T45999 |
10. 400V Primary - 240Y/139 Secondary
| kVA | Output Amps | Aluminum | Copper |
| 3 | 7.22 | - | T46000 |
| 6 | 14.43 | - | T46001 |
| 9 | 21.65 | - | T46002 |
| 15 | 36.09 | T40492 | T46003 |
| 30 | 72.17 | T40493 | T46004 |
| 45 | 108.26 | T40494 | T46005 |
| 75 | 180.43 | T40495 | T46006 |
| 112.5 | 270.64 | T40496 | T46007 |
| 150 | 360.85 | T40497 | T46008 |
| 225 | 541.28 | T40498 | T46009 |
| 300 | 721.71 | T40499 | T46010 |
| 450 | 1082.56 | T40500 | T46011 |
| 500 | 1202.85 | T40501 | T46012 |
| 600 | 1443.42 | T40502 | T46013 |
| 750 | 1804.27 | T40503 | T46014 |
11. 400V Primary - 240CTD/120 Secondary
| kVA | Output Amps | Aluminum | Copper |
| 3 | 7.22 | - | T46015 |
| 6 | 14.43 | - | T46016 |
| 9 | 21.65 | - | T46017 |
| 15 | 36.09 | T40504 | T46018 |
| 30 | 72.17 | T40505 | T46019 |
| 45 | 108.26 | T40506 | T46020 |
| 75 | 180.43 | T40507 | T46021 |
| 112.5 | 270.64 | T40508 | T46022 |
| 150 | 360.85 | T40509 | T46023 |
| 225 | 541.28 | T40510 | T46024 |
| 300 | 721.71 | T40511 | T46025 |
| 450 | 1082.56 | T40512 | T46026 |
| 500 | 1202.85 | T40513 | T46027 |
| 600 | 1443.42 | T40514 | T46028 |
| 750 | 1804.27 | T40515 | T46029 |
12. 400V Primary - 230Y/133 Secondary
| kVA | Output Amps | Aluminum | Copper |
| 3 | 7.53 | - | T46030 |
| 6 | 15.06 | - | T46031 |
| 9 | 22.59 | - | T46032 |
| 15 | 37.65 | T40516 | T46033 |
| 30 | 75.31 | T40517 | T46034 |
| 45 | 112.96 | T40518 | T46035 |
| 75 | 188.27 | T40519 | T46036 |
| 112.5 | 282.41 | T40520 | T46037 |
| 150 | 376.54 | T40521 | T46038 |
| 225 | 564.82 | T40522 | T46039 |
| 300 | 753.09 | T40523 | T46040 |
| 450 | 1129.63 | T40524 | T46041 |
| 500 | 1255.15 | T40525 | T46042 |
| 600 | 1506.18 | T40526 | T46043 |
| 750 | 1882.72 | T40527 | T46044 |
13. 400V Primary - 220Y/127 Secondary
| kVA | Output Amps | Aluminum | Copper |
| 3 | 7.87 | - | T46045 |
| 6 | 15.75 | - | T46046 |
| 9 | 23.62 | - | T46047 |
| 15 | 39.37 | T40528 | T46048 |
| 30 | 78.73 | T40529 | T46049 |
| 45 | 118.10 | T40530 | T46050 |
| 75 | 196.83 | T40531 | T46051 |
| 112.5 | 295.24 | T40532 | T46052 |
| 150 | 393.66 | T40533 | T46053 |
| 225 | 590.49 | T40534 | T46054 |
| 300 | 787.32 | T40535 | T46055 |
| 450 | 1180.98 | T40536 | T46056 |
| 500 | 1312.20 | T40537 | T46057 |
| 600 | 1574.64 | T40538 | T46058 |
| 750 | 1968.30 | T40539 | T46059 |
14. 400V Primary - 216V Delta Secondary
| kVA | Output Amps | Aluminum | Copper |
| 3 | 8.02 | - | T46060 |
| 6 | 16.04 | - | T46061 |
| 9 | 24.06 | - | T46062 |
| 15 | 40.09 | T40540 | T46063 |
| 30 | 80.19 | T40541 | T46064 |
| 45 | 120.28 | T40542 | T46065 |
| 75 | 200.47 | T40543 | T46066 |
| 112.5 | 300.71 | T40544 | T46067 |
| 150 | 400.95 | T40545 | T46068 |
| 225 | 601.42 | T40546 | T46069 |
| 300 | 801.90 | T40547 | T46070 |
| 450 | 1202.85 | T40548 | T46071 |
| 500 | 1336.50 | T40549 | T46072 |
| 600 | 1603.80 | T40550 | T46073 |
| 750 | 2004.75 | T40551 | T46074 |
15. 400V Primary - 208Y/120 Secondary
| kVA | Output Amps | Aluminum | Copper |
| 3 | 8.33 | - | TT1594 |
| 6 | 16.65 | - | TT1595 |
| 9 | 24.98 | - | TT1596 |
| 15 | 41.64 | T40552 | T46078 |
| 30 | 83.27 | T40553 | T46079 |
| 45 | 124.91 | T40554 | T46080 |
| 75 | 208.19 | T40555 | T46081 |
| 112.5 | 312.28 | T40556 | T46082 |
| 150 | 416.37 | T40557 | T46083 |
| 225 | 624.56 | T40558 | T46084 |
| 300 | 832.74 | T40559 | T46085 |
| 450 | 1249.11 | T40560 | T46086 |
| 500 | 1387.90 | T40561 | T46087 |
| 600 | 1665.48 | T40562 | T46088 |
| 750 | 2081.85 | T40563 | T46089 |
16. 400V Primary - 200Y/115 Secondary
| kVA | Output Amps | Aluminum | Copper |
| 3 | 8.66 | - | T46090 |
| 6 | 17.32 | - | T46091 |
| 9 | 25.98 | - | T46092 |
| 15 | 43.30 | T40564 | T46093 |
| 30 | 86.61 | T40565 | T46094 |
| 45 | 129.91 | T40566 | T46095 |
| 75 | 216.51 | T40567 | T46096 |
| 112.5 | 324.77 | T40568 | T46097 |
| 150 | 433.03 | T40569 | T46098 |
| 225 | 649.54 | T40570 | T46099 |
| 300 | 866.05 | T40571 | T46100 |
| 450 | 1299.08 | T40572 | T46101 |
| 500 | 1443.42 | T40573 | T46102 |
| 600 | 1732.10 | T40574 | T46103 |
| 750 | 2165.13 | T40575 | T46104 |
17. 400V Primary - 190Y/110 Secondary
| kVA | Output Amps | Aluminum | Copper |
| 3 | 9.12 | - | Contact |
| 6 | 18.23 | - | Contact |
| 9 | 27.35 | - | Contact |
| 15 | 45.58 | Contact | Contact |
| 30 | 91.16 | Contact | Contact |
| 45 | 136.74 | Contact | Contact |
| 75 | 227.91 | Contact | Contact |
| 112.5 | 341.86 | Contact | Contact |
| 150 | 455.82 | Contact | Contact |
| 225 | 683.72 | Contact | Contact |
| 300 | 911.63 | Contact | Contact |
| 450 | 1367.45 | Contact | Contact |
| 500 | 1519.39 | Contact | Contact |
| 600 | 1823.26 | Contact | Contact |
| 750 | 2279.08 | Contact | Contact |
18. 400V Primary - 120V Delta Secondary
| kVA | Output Amps | Aluminum | Copper |
| 3 | 14.43 | - | T46120 |
| 6 | 28.87 | - | T46121 |
| 9 | 43.30 | - | T46122 |
| 15 | 72.17 | T40588 | T46123 |
| 30 | 144.34 | T40589 | T46124 |
| 45 | 216.51 | T40590 | T46125 |
| 75 | 360.85 | T40591 | T46126 |
| 112.5 | 541.28 | T40592 | T46127 |
| 150 | 721.71 | T40593 | T46128 |
| 225 | 1082.56 | T40594 | T46129 |
| 300 | 1443.42 | T40595 | T46130 |
| 450 | 2165.13 | T40596 | T46131 |
| 500 | 2405.70 | T40597 | T46132 |
| 600 | 2886.84 | T40598 | T46133 |
| 750 | 3608.55 | T40599 | T46134 |
19. 400V Primary - 115V Delta Secondary
| kVA | Output Amps | Aluminum | Copper |
| 3 | 15.06 | - | T46135 |
| 6 | 30.12 | - | T46136 |
| 9 | 45.19 | - | T46137 |
| 15 | 75.31 | T40600 | T46138 |
| 30 | 150.62 | T40601 | T46139 |
| 45 | 225.93 | T40602 | T46140 |
| 75 | 376.54 | T40603 | T46141 |
| 112.5 | 564.82 | T40604 | T46142 |
| 150 | 753.09 | T40605 | T46143 |
| 225 | 1129.63 | T40606 | T46144 |
| 300 | 1506.18 | T40607 | T46145 |
| 450 | 2259.26 | T40608 | T46146 |
| 500 | 2510.29 | T40609 | T46147 |
| 600 | 3012.35 | T40610 | T46148 |
| 750 | 3765.44 | T40611 | T46149 |
20. 400V Primary - 110V Delta Secondary
| kVA | Output Amps | Aluminum | Copper |
| 3 | 15.75 | - | T46150 |
| 6 | 31.49 | - | T46151 |
| 9 | 47.24 | - | T46152 |
| 15 | 78.73 | T40612 | T46153 |
| 30 | 157.46 | T40613 | T46154 |
| 45 | 236.20 | T40614 | T46155 |
| 75 | 393.66 | T40615 | T46156 |
| 112.5 | 590.49 | T40616 | T46157 |
| 150 | 787.32 | T40617 | T46158 |
| 225 | 1180.98 | T40618 | T46159 |
| 300 | 1574.64 | T40619 | T46160 |
| 450 | 2361.96 | T40620 | T46161 |
| 500 | 2624.40 | T40621 | T46162 |
| 600 | 3149.28 | T40622 | T46163 |
| 750 | 3936.59 | T40623 | T46164 |
21. 400V Primary - 100V Delta Secondary
| kVA | Output Amps | Aluminum | Copper |
| 3 | 17.32 | - | Contact |
| 6 | 34.64 | - | Contact |
| 9 | 51.96 | - | Contact |
| 15 | 86.61 | Contact | Contact |
| 30 | 173.21 | Contact | Contact |
| 45 | 259.82 | Contact | Contact |
| 75 | 433.03 | Contact | Contact |
| 112.5 | 649.54 | Contact | Contact |
| 150 | 866.05 | Contact | Contact |
| 225 | 1299.08 | Contact | Contact |
| 300 | 1732.10 | Contact | Contact |
| 450 | 2598.15 | Contact | Contact |
| 500 | 2886.84 | Contact | Contact |
| 600 | 3464.20 | Contact | Contact |
| 750 | 4330.25 | Contact | Contact |