C. 550 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
• 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
Copper Wound Autotransformers, 550V Primary
| Select Secondary Voltage Below | |||||||||
| kVA | 600V | 575V | 550V | 480V | 460V | 440V | 416V | 400V | 380V |
| 15 | T55170 | T55180 | T55190 | T55200 | T55210 | T55220 | T55230 | T55240 | T55250 |
| 30 | T55171 | T55181 | T55191 | T55201 | T55211 | T55221 | T55231 | T55241 | T55251 |
| 45 | T55172 | T55182 | T55192 | T55202 | T55212 | T55222 | T55232 | T55242 | T55252 |
| 75 | T55173 | T55183 | T55193 | T55203 | T55213 | T55223 | T55233 | T55243 | T55253 |
| 112.5 | T55174 | T55184 | T55194 | T55204 | T55214 | T55224 | T55234 | T55244 | T55254 |
| 225 | T55175 | T55185 | T55195 | T55205 | T55215 | T55225 | T55235 | T55245 | T55255 |
| 300 | T55176 | T55186 | T55196 | T55206 | T55216 | T55226 | T55236 | T55246 | T55256 |
| 450 | T55177 | T55187 | T55197 | T55207 | T55217 | T55227 | T55237 | T55247 | T55257 |
| 500 | T55178 | T55188 | T55198 | T55208 | T55218 | T55228 | T55238 | T55248 | T55258 |
| 750 | T55179 | T55189 | T55199 | T55209 | T55219 | T55229 | T55239 | T55249 | T55259 |
Output Amps
| kVA | Output Amps at: | ||||||||
| 600V | 575V | 550V | 480V | 460V | 440V | 416V | 400V | 380V | |
| 15 | 14.4 | 15.1 | 15.8 | 18 | 18.8 | 19.7 | 20.8 | 21.7 | 22.8 |
| 30 | 28.9 | 30.1 | 31.5 | 36.1 | 37.7 | 39.4 | 41.6 | 43.3 | 45.6 |
| 45 | 43.3 | 45.2 | 47.2 | 54.1 | 56.5 | 59.1 | 62.5 | 64 | 68.4 |
| 75 | 72.2 | 75.3 | 78.7 | 90.2 | 94.1 | 98.4 | 104.1 | 108.3 | 113 |
| 112.5 | 108.3 | 112 | 118.1 | 135.3 | 141.2 | 147.6 | 156.1 | 162.4 | 170.9 |
| 225 | 216.5 | 225.9 | 236.2 | 270.6 | 282.4 | 295.2 | 312.3 | 324.8 | 341.9 |
| 300 | 288.7 | 301.2 | 314.9 | 360.9 | 376.5 | 393.7 | 416.4 | 433 | 455.8 |
| 450 | 433 | 451.9 | 472.4 | 541.3 | 564.8 | 590.5 | 624.6 | 649.5 | 683.7 |
| 500 | 481.1 | 502.1 | 524.9 | 601.4 | 627.6 | 656.1 | 693 | 721.7 | 759.7 |
| 750 | 721.7 | 753.1 | 787.3 | 902.1 | 941.4 | 984.2 | 1040.9 | 1082.6 | 1139 |