380 Volt Three Phase Autotransformers

I. 380 Volts Primary, Three Phase Autotransformers

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TEMCo Single Phase Autotransformers 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? Click here to see all the primary voltage configurations, or see our full selection of autotransformers here.


Product Selection

Aluminum Wound Autotransformers, 380V Primary

Select Secondary Voltage Below
kVA 600V 575V 550V 480V 460V 440V 416V 400V
75 T53543 T53553 T53563 T53573 T53583 T53593 T53603 T53613
112.5 T53544 T53554 T53564 T53574 T53584 T53594 T53604 T53614
225 T53545 T53555 T53565 T53575 T53585 T53595 T53605 T53615
300 T53546 T53556 T53566 T53576 T53586 T53596 T53606 T53616
450 T53547 T53557 T53567 T53577 T53587 T53597 T53607 T53617
500 T53548 T53558 T53568 T53578 T53588 T53598 T53608 T53618
750 T53549 T53559 T53569 T53579 T53589 T53599 T53609 T53619
kVA 380V 240V 230V 220V 216V 208V 200V 190V
75 T53623 T53633 T53643 T53653 T53663 T53673 T53683 T53693
112.5 T53624 T53634 T53644 T53654 T53664 T53674 T53684 T53694
225 T53625 T53635 T53645 T53655 T53665 T53675 T53685 T53695
300 T53626 T53636 T53646 T53656 T53666 T53676 T53686 T53696
450 T53627 T53637 T53647 T53657 T53667 T53677 T53687 T53697
500 T53628 T53638 T53648 T53658 T53668 T53678 T53688 T53698
750 T53629 T53639 T53649 T53659 T53669 T53679 T53689 T53699

Copper Wound Autotransformers, 380V Primary

Select Secondary Voltage Below
kVA 600V 575V 550V 480V 460V 440V 416V 400V
15 T55880 T55890 T55900 T55910 T55920 T55930 T55940 T55950
30 T55881 T55891 T55901 T55911 T55921 T55931 T55941 T55951
45 T55882 T55892 T55902 T55912 T55922 T55932 T55942 T55952
75 T55883 T55893 T55903 T55913 T55923 T55933 T55943 T55953
112.5 T55884 T55894 T55904 T55914 T55924 T55934 T55944 T55954
225 T55885 T55895 T55905 T55915 T55925 T55935 T55945 T55955
300 T55886 T55896 T55906 T55916 T55926 T55936 T55946 T55956
450 T55887 T55897 T55907 T55917 T55927 T55937 T55947 T55957
500 T55888 T55898 T55908 T55918 T55928 T55938 T55948 T55958
750 T55889 T55899 T55909 T55919 T55929 T55939 T55949 T55959
kVA 380V 240V 230V 220V 216V 208V 200V 190V
15 T55960 T55970 T55980 T55990 T56000 T56010 T56020 T56030
30 T55961 T55971 T55981 T55991 T56001 T56011 T56021 T56031
45 T55962 T55972 T55982 T55992 T56002 T56012 T56022 T56032
75 T55963 T55973 T55983 T55993 T56003 T56013 T56023 T56033
112.5 T55964 T55974 T55984 T55994 T56004 T56014 T56024 T56034
225 T55965 T55975 T55985 T55995 T56005 T56015 T56025 T56035
300 T55966 T55976 T55986 T55996 T56006 T56016 T56026 T56036
450 T55967 T55977 T55987 T55997 T56007 T56017 T56027 T56037
500 T55968 T55978 T55988 T55998 T56008 T56018 T56028 T56038
750 T55969 T55979 T55989 T55999 T56009 T56019 T56029 T56039

Output Amps

kVA Output Amps at:
600V 575V 550V 480V 460V 440V 416V 400V 380V 240V 230V 220V 216V 208V 200V 190V
15 14.4 15.1 15.8 18 18.8 19.7 20.8 21.7 22.8 36.1 37.7 39.4 40.1 41.6 43.3 45.6
30 28.9 30.1 31.5 36.1 37.7 39.4 41.6 43.3 45.6 72.2 75.3 78.7 80.2 83.3 86.6 91.2
45 43.3 45.2 47.2 54.1 56.5 59.1 62.5 64 68.4 108.3 112 118.1 120.3 124.9 129.9 136.7
75 72.2 75.3 78.7 90.2 94.1 98.4 104.1 108.3 113 180.4 188.3 196.8 200.5 208.2 216.5 227.9
112.5 108.3 112 118.1 135.3 141.2 147.6 156.1 162.4 170.9 270.6 282.4 295.2 300.7 312.3 324.8 341.9
225 216.5 225.9 236.2 270.6 282.4 295.2 312.3 324.8 341.9 541.2 564.8 590.5 601.4 624.6 649.5 683.7
300 288.7 301.2 314.9 360.9 376.5 393.7 416.4 433 455.8 721.7 753.1 787.3 801.9 832.7 866.1 911.6
450 433 451.9 472.4 541.3 564.8 590.5 624.6 649.5 683.7 1082 1129 1180 1202 1249 1299 1367
500 481.1 502.1 524.9 601.4 627.6 656.1 693 721.7 759.7 1202 1255 1312 1336 1387 1443 1519
750 721.7 753.1 787.3 902.1 941.4 984.2 1040.9 1082.6 1139 1804 1882 1968 2004 2081 2165 2279