277 Volt Primary Single Phase Isolation Transformers

O. 277 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. 277V Primary - 600 Secondary

kVA Output Amps Aluminum Copper
3 5 - T32792
5 8.33 - T32793
7.5 12.5 - T32794
10 16.67 T21819 T32795
15 25 T21820 T32796
25 41.67 T21821 T32797
37.5 62.5 T21822 T32798
50 83.33 T21823 T32799
75 125 T21824 T32800
100 166.67 T21825 T32801
167 278.33 T21826 T32802
200 333.33 T21827 T32803
250 416.67 T21828 T32804
330 550 T21829 T32805

2. 277V Primary - 575 Secondary

kVA Output Amps Aluminum Copper
3 5.22 - T32806
5 8.70 - T32807
7.5 13.04 - T32808
10 17.39 T21833 T32809
15 26.09 T21834 T32810
25 43.48 T21835 T32811
37.5 65.22 T21836 T32812
50 86.96 T21837 T32813
75 130.43 T21838 T32814
100 173.91 T21839 T32815
167 290.43 T21840 T32816
200 347.83 T21841 T32817
250 434.78 T21842 T32818
330 573.91 T21843 T32819

3. 277V Primary - 550 Secondary

kVA Output Amps Aluminum Copper
3 5.45 - T32820
5 9.09 - T32821
7.5 13.64 - T32822
10 18.18 T21847 T32823
15 27.27 T21848 T32824
25 45.45 T21849 T32825
37.5 68.18 T21850 T32826
50 90.91 T21851 T32827
75 136.36 T21852 T32828
100 181.82 T21853 T32829
167 303.64 T21854 T32830
200 363.64 T21855 T32831
250 454.55 T21856 T32832
330 600 T21857 T32833

4. 277V Primary - 480 Secondary

kVA Output Amps Aluminum Copper
3 6.25 - T32834
5 10.42 - T32835
7.5 15.63 - T32836
10 20.83 T21861 T32837
15 31.25 T21862 T32838
25 52.08 T21863 T32839
37.5 78.13 T21864 T32840
50 104.17 T21865 T32841
75 156.25 T21866 T32842
100 208.33 T21867 T32843
167 347.92 T21868 T32844
200 416.67 T21869 T32845
250 520.83 T21870 T32846
330 687.50 T21871 T32847

5. 277V Primary - 240/480 Secondary

kVA Output Amps Aluminum Copper
3 12.5/6.25 - T32848
5 20.83/10.42 - T32849
7.5 31.25/15.63 - T32850
10 41.67/20.83 T21875 T32851
15 62.5/31.25 T21876 T32852
25 104.17/52.08 T21877 T32853
37.5 156.25/78.13 T21878 T32854
50 208.33/104.17 T21879 T32855
75 312.5/156.25 T21880 T32856
100 416.67/208.33 T21881 T32857
167 695.83/347.92 T21882 T32858
200 833.33/416.67 T21883 T32859
250 1041.67/520.83 T21884 T32860
330 1375/687.5 T21885 T32861

6. 277V Primary - 460 Secondary

kVA Output Amps Aluminum Copper
3 6.52 - T32862
5 10.87 - T32863
7.5 16.30 - T32864
10 21.74 T21889 T32865
15 32.61 T21890 T32866
25 54.35 T21891 T32867
37.5 81.52 T21892 T32868
50 108.70 T21893 T32869
75 163.04 T21894 T32870
100 217.39 T21895 T32871
167 363.04 T21896 T32872
200 434.78 T21897 T32873
250 543.48 T21898 T32874
330 717.39 T21899 T32875

7. 277V Primary - 230/460 Secondary

kVA Output Amps Aluminum Copper
3 13.04/6.52 - T32876
5 21.74/10.87 - T32877
7.5 32.61/16.3 - T32878
10 43.48/21.74 T21903 T32879
15 65.22/32.61 T21904 T32880
25 108.7/54.35 T21905 T32881
37.5 163.04/81.52 T21906 T32882
50 217.39/108.7 T21907 T32883
75 326.09/163.04 T21908 T32884
100 434.78/217.39 T21909 T32885
167 726.09/363.04 T21910 T32886
200 869.57/434.78 T21911 T32887
250 1086.96/543.48 T21912 T32888
330 1434.78/717.39 T21913 T32889

8. 277V Primary - 440 Secondary

kVA Output Amps Aluminum Copper
3 6.82 - T32890
5 11.36 - T32891
7.5 17.05 - T32892
10 22.73 T21917 T32893
15 34.09 T21918 T32894
25 56.82 T21919 T32895
37.5 85.23 T21920 T32896
50 113.64 T21921 T32897
75 170.45 T21922 T32898
100 227.27 T21923 T32899
167 379.55 T21924 T32900
200 454.55 T21925 T32901
250 568.18 T21926 T32902
330 750 T21927 T32903

9. 277V Primary - 220/440 Secondary

kVA Output Amps Aluminum Copper
3 13.64/6.82 - T32904
5 22.73/11.36 - T32905
7.5 34.09/17.05 - T32906
10 45.45/22.73 T21931 T32907
15 68.18/34.09 T21932 T32908
25 113.64/56.82 T21933 T32909
37.5 170.45/85.23 T21934 T32910
50 227.27/113.64 T21935 T32911
75 340.91/170.45 T21936 T32912
100 454.55/227.27 T21937 T32913
167 759.09/379.55 T21938 T32914
200 909.09/454.55 T21939 T32915
250 1136.36/568.18 T21940 T32916
330 1500/750 T21941 T32917

10. 277V Primary - 416 Secondary

kVA Output Amps Aluminum Copper
3 7.21 - T32918
5 12.02 - T32919
7.5 18.03 - T32920
10 24.04 T21945 T32921
15 36.06 T21946 T32922
25 60.10 T21947 T32923
37.5 90.14 T21948 T32924
50 120.19 T21949 T32925
75 180.29 T21950 T32926
100 240.38 T21951 T32927
167 401.44 T21952 T32928
200 480.77 T21953 T32929
250 600.96 T21954 T32930
330 793.27 T21955 T32931

11. 277V Primary - 208/416 Secondary

kVA Output Amps Aluminum Copper
3 14.42/7.21 - T32932
5 24.04/12.02 - T32933
7.5 36.06/18.03 - T32934
10 48.08/24.04 T21959 T32935
15 72.12/36.06 T21960 T32936
25 120.19/60.1 T21961 T32937
37.5 180.29/90.14 T21962 T32938
50 240.38/120.19 T21963 T32939
75 360.58/180.29 T21964 T32940
100 480.77/240.38 T21965 T32941
167 802.88/401.44 T21966 T32942
200 961.54/480.77 T21967 T32943
250 1201.92/600.96 T21968 T32944
330 1586.54/793.27 T21969 T32945

12. 277V Primary - 400 Secondary

kVA Output Amps Aluminum Copper
3 7.5 - T32946
5 12.5 - T32947
7.5 18.75 - T32948
10 25 T21973 T32949
15 37.5 T21974 T32950
25 62.5 T21975 T32951
37.5 93.75 T21976 T32952
50 125 T21977 T32953
75 187.5 T21978 T32954
100 250 T21979 T32955
167 417.5 T21980 T32956
200 500 T21981 T32957
250 625 T21982 T32958
330 825 T21983 T32959

13. 277V Primary - 380 Secondary

kVA Output Amps Aluminum Copper
3 7.89 - T32960
5 13.16 - T32961
7.5 19.74 - T32962
10 26.32 T21987 T32963
15 39.47 T21988 T32964
25 65.79 T21989 T32965
37.5 98.68 T21990 T32966
50 131.58 T21991 T32967
75 197.37 T21992 T32968
100 263.16 T21993 T32969
167 439.47 T21994 T32970
200 526.32 T21995 T32971
250 657.89 T21996 T32972
330 868.42 T21997 T32973

14. 277V Primary - 347 Secondary

kVA Output Amps Aluminum Copper
3 8.65 - T32974
5 14.41 - T32975
7.5 21.61 - T32976
10 28.82 T22001 T32977
15 43.23 T22002 T32978
25 72.05 T22003 T32979
37.5 108.07 T22004 T32980
50 144.09 T22005 T32981
75 216.14 T22006 T32982
100 288.18 T22007 T32983
167 481.27 T22008 T32984
200 576.37 T22009 T32985
250 720.46 T22010 T32986
330 951.01 T22011 T32987

15. 277V Primary - 277 Secondary

kVA Output Amps Aluminum Copper
3 10.83 - T32988
5 18.05 - T32989
7.5 27.08 - T32990
10 36.10 T22015 T32991
15 54.15 T22016 T32992
25 90.25 T22017 T32993
37.5 135.38 T22018 T32994
50 180.51 T22019 T32995
75 270.76 T22020 T32996
100 361.01 T22021 T32997
167 602.89 T22022 T32998
200 722.02 T22023 T32999
250 902.53 T22024 T33000
330 1191.34 T22025 T33001

16. 277V Primary - 240 Secondary

kVA Output Amps Aluminum Copper
3 12.5 - T33002
5 20.83 - T33003
7.5 31.25 - T33004
10 41.67 T22029 T33005
15 62.5 T22030 T33006
25 104.17 T22031 T33007
37.5 156.25 T22032 T33008
50 208.33 T22033 T33009
75 312.5 T22034 T33010
100 416.67 T22035 T33011
167 695.83 T22036 T33012
200 833.33 T22037 T33013
250 1041.67 T22038 T33014
330 1375 T22039 T33015

17. 277V Primary - 120/240 Secondary

kVA Output Amps Aluminum Copper
3 25/12.5 - T33016
5 41.67/20.83 - T33017
7.5 62.5/31.25 - T33018
10 83.33/41.67 T22043 T33019
15 125/62.5 T22044 T33020
25 208.33/104.17 T22045 T33021
37.5 312.5/156.25 T22046 T33022
50 416.67/208.33 T22047 T33023
75 625/312.5 T22048 T33024
100 833.33/416.67 T22049 T33025
167 1391.67/695.83 T22050 T33026
200 1666.67/833.33 T22051 T33027
250 2083.33/1041.67 T22052 T33028
330 2750/1375 T22053 T33029

18. 277V Primary - 230 Secondary

kVA Output Amps Aluminum Copper
3 13.04 - T33030
5 21.74 - T33031
7.5 32.61 - T33032
10 43.48 T22057 T33033
15 65.22 T22058 T33034
25 108.70 T22059 T33035
37.5 163.04 T22060 T33036
50 217.39 T22061 T33037
75 326.09 T22062 T33038
100 434.78 T22063 T33039
167 726.09 T22064 T33040
200 869.57 T22065 T33041
250 1086.96 T22066 T33042
330 1434.78 T22067 T33043

19. 277V Primary - 115/230 Secondary

kVA Output Amps Aluminum Copper
3 26.09/13.04 - T33044
5 43.48/21.74 - T33045
7.5 65.22/32.61 - T33046
10 86.96/43.48 T22071 T33047
15 130.43/65.22 T22072 T33048
25 217.39/108.7 T22073 T33049
37.5 326.09/163.04 T22074 T33050
50 434.78/217.39 T22075 T33051
75 652.17/326.09 T22076 T33052
100 869.57/434.78 T22077 T33053
167 1452.17/726.09 T22078 T33054
200 1739.13/869.57 T22079 T33055
250 2173.91/1086.96 T22080 T33056
330 2869.57/1434.78 T22081 T33057

20. 277V Primary - 220 Secondary

kVA Output Amps Aluminum Copper
3 13.64 - T33058
5 22.73 - T33059
7.5 34.09 - T33060
10 45.45 T22085 T33061
15 68.18 T22086 T33062
25 113.64 T22087 T33063
37.5 170.45 T22088 T33064
50 227.27 T22089 T33065
75 340.91 T22090 T33066
100 454.55 T22091 T33067
167 759.09 T22092 T33068
200 909.09 T22093 T33069
250 1136.36 T22094 T33070
330 1500 T22095 T33071

21. 277V Primary - 110/220 Secondary

kVA Output Amps Aluminum Copper
3 27.27/13.64 - T33072
5 45.45/22.73 - T33073
7.5 68.18/34.09 - T33074
10 90.91/45.45 T22099 T33075
15 136.36/68.18 T22100 T33076
25 227.27/113.64 T22101 T33077
37.5 340.91/170.45 T22102 T33078
50 454.55/227.27 T22103 T33079
75 681.82/340.91 T22104 T33080
100 909.09/454.55 T22105 T33081
167 1518.18/759.09 T22106 T33082
200 1818.18/909.09 T22107 T33083
250 2272.73/1136.36 T22108 T33084
330 3000/1500 T22109 T33085

22. 277V Primary - 208 Secondary

kVA Output Amps Aluminum Copper
3 14.42 - T33086
5 24.04 - T33087
7.5 36.06 - T33088
10 48.08 T22113 T33089
15 72.12 T22114 T33090
25 120.19 T22115 T33091
37.5 180.29 T22116 T33092
50 240.38 T22117 T33093
75 360.58 T22118 T33094
100 480.77 T22119 T33095
167 802.88 T22120 T33096
200 961.54 T22121 T33097
250 1201.92 T22122 T33098
330 1586.54 T22123 T33099

23. 277V Primary - 200 Secondary

kVA Output Amps Aluminum Copper
3 15 - T33100
5 25 - T33101
7.5 37.5 - T33102
10 50 T22127 T33103
15 75 T22128 T33104
25 125 T22129 T33105
37.5 187.5 T22130 T33106
50 250 T22131 T33107
75 375 T22132 T33108
100 500 T22133 T33109
167 835 T22134 T33110
200 1000 T22135 T33111
250 1250 T22136 T33112
330 1650 T22137 T33113

24. 277V Primary - 190 Secondary

kVA Output Amps Aluminum Copper
3 15.79 - T33114
5 26.32 - T33115
7.5 39.47 - T33116
10 52.63 T22141 T33117
15 78.95 T22142 T33118
25 131.58 T22143 T33119
37.5 197.37 T22144 T33120
50 263.16 T22145 T33121
75 394.74 T22146 T33122
100 526.32 T22147 T33123
167 878.95 T22148 T33124
200 1052.63 T22149 T33125
250 1315.79 T22150 T33126
330 1736.84 T22151 T33127

25. 277V Primary - 120 Secondary

kVA Output Amps Aluminum Copper
3 25 - T33128
5 41.67 - T33129
7.5 62.5 - T33130
10 83.33 T22155 T33131
15 125 T22156 T33132
25 208.33 T22157 T33133
37.5 312.5 T22158 T33134
50 416.67 T22159 T33135
75 625 T22160 T33136
100 833.33 T22161 T33137
167 1391.67 T22162 T33138
200 1666.67 T22163 T33139
250 2083.33 T22164 T33140
330 2750 T22165 T33141

26. 277V Primary - 115 Secondary

kVA Output Amps Aluminum Copper
3 26.09 - T33142
5 43.48 - T33143
7.5 65.22 - T33144
10 86.96 T22169 T33145
15 130.43 T22170 T33146
25 217.39 T22171 T33147
37.5 326.09 T22172 T33148
50 434.78 T22173 T33149
75 652.17 T22174 T33150
100 869.57 T22175 T33151
167 1452.17 T22176 T33152
200 1739.13 T22177 T33153
250 2173.91 T22178 T33154
330 2869.57 T22179 T33155

27. 277V Primary - 110 Secondary

kVA Output Amps Aluminum Copper
3 27.27 - T33156
5 45.45 - T33157
7.5 68.18 - T33158
10 90.91 T22183 T33159
15 136.36 T22184 T33160
25 227.27 T22185 T33161
37.5 340.91 T22186 T33162
50 454.55 T22187 T33163
75 681.82 T22188 T33164
100 909.09 T22189 T33165
167 1518.18 T22190 T33166
200 1818.18 T22191 T33167
250 2272.73 T22192 T33168
330 3000 T22193 T33169

28. 277V Primary - 100 Secondary

kVA Output Amps Aluminum Copper
3 30 - T33170
5 50 - T33171
7.5 75 - T33172
10 100 T22197 T33173
15 150 T22198 T33174
25 250 T22199 T33175
37.5 375 T22200 T33176
50 500 T22201 T33177
75 750 T22202 T33178
100 1000 T22203 T33179
167 1670 T22204 T33180
200 2000 T22205 T33181
250 2500 T22206 T33182
330 3300 T22207 T33183