J. 347 Volts Primary, Single 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
347V Primary, Copper Wound, 1 Phase Autotransformers
| kVA | Select Secondary Voltage Below | ||||||||
| 600V | 575V | 550V | 480V | 460V | 440V | 416V | 400V | 380V | |
| 3 | T51140 | T51150 | T51160 | T51170 | T51180 | T51190 | T51200 | T51210 | T51220 |
| 5 | T51141 | T51151 | T51161 | T51171 | T51181 | T51191 | T51201 | T51211 | T51221 |
| 7 | T51142 | T51152 | T51162 | T51172 | T51182 | T51192 | T51202 | T51212 | T51222 |
| 10 | T51143 | T51153 | T51163 | T51173 | T51183 | T51193 | T51203 | T51213 | T51223 |
| 15 | T51144 | T51154 | T51164 | T51174 | T51184 | T51194 | T51204 | T51214 | T51224 |
| 25 | T51145 | T51155 | T51165 | T51175 | T51185 | T51195 | T51205 | T51215 | T51225 |
| 37 | T51146 | T51156 | T51166 | T51176 | T51186 | T51196 | T51206 | T51216 | T51226 |
| 50 | T51147 | T51157 | T51167 | T51177 | T51187 | T51197 | T51207 | T51217 | T51227 |
| 75 | T51148 | T51158 | T51168 | T51178 | T51188 | T51198 | T51208 | T51218 | T51228 |
| 100 | T51149 | T51159 | T51169 | T51179 | T51189 | T51199 | T51209 | T51219 | T51229 |
| kVA | Select Secondary Voltage Below | |||||||
| 347V | 277V | 240V | 230V | 220V | 208V | 200V | 190V | |
| 3 | T51230 | T51240 | T51250 | T51260 | T51270 | T51280 | T51290 | T51300 |
| 5 | T51231 | T51241 | T51251 | T51261 | T51271 | T51281 | T51291 | T51301 |
| 7 | T51232 | T51242 | T51252 | T51262 | T51272 | T51282 | T51292 | T51302 |
| 10 | T51233 | T51243 | T51253 | T51263 | T51273 | T51283 | T51293 | T51303 |
| 15 | T51234 | T51244 | T51254 | T51264 | T51274 | T51284 | T51294 | T51304 |
| 25 | T51235 | T51245 | T51255 | T51265 | T51275 | T51285 | T51295 | T51305 |
| 37 | T51236 | T51246 | T51256 | T51266 | T51276 | T51286 | T51296 | T51306 |
| 50 | T51237 | T51247 | T51257 | T51267 | T51277 | T51287 | T51297 | T51307 |
| 75 | T51238 | T51248 | T51258 | T51268 | T51278 | T51288 | T51298 | T51308 |
| 100 | T51239 | T51249 | T51259 | T51269 | T51279 | T51289 | T51299 | T51309 |
Output Amps
| kVA | Output Amps at: | ||||||||||||||||
| 600V | 575V | 550V | 480V | 460V | 440V | 416V | 400V | 380V | 347V | 277V | 240V | 230V | 220V | 208V | 200V | 190V | |
| 3 | 5 | 5.2 | 5.5 | 6.3 | 6.52 | 6.8 | 7.2 | 7.5 | 7.9 | 8.7 | 10.8 | 12.5 | 13 | 13.6 | 14.4 | 15 | 15.8 |
| 5 | 8.3 | 8.7 | 9.1 | 10.4 | 10.9 | 11.4 | 12 | 12.5 | 13.2 | 14.4 | 18.1 | 20.8 | 21.7 | 22.7 | 24 | 25 | 26.3 |
| 7 | 11.7 | 12.2 | 12.7 | 14.6 | 15.2 | 15.9 | 16.8 | 17.5 | 18.4 | 20.2 | 25.3 | 29.2 | 30.4 | 31.8 | 33.7 | 35 | 36.8 |
| 10 | 16.7 | 17.4 | 18.2 | 20.8 | 21.74 | 22.7 | 24 | 25 | 26.3 | 28.8 | 36.1 | 41.7 | 43.5 | 45.5 | 48.1 | 50 | 52.6 |
| 15 | 25 | 26.1 | 27.3 | 31.3 | 32.61 | 34.1 | 36.1 | 37.5 | 39.5 | 43.2 | 54.2 | 62.5 | 65.2 | 68.2 | 72.1 | 75 | 79 |
| 25 | 41.7 | 43.5 | 45.5 | 52.1 | 54.35 | 56.8 | 60.1 | 62.5 | 65.8 | 72.1 | 90.3 | 104.2 | 108.7 | 113.6 | 120.2 | 125 | 131.6 |
| 37 | 61.7 | 64.4 | 67.3 | 77.1 | 80.43 | 84.1 | 88.9 | 92.5 | 97.4 | 106.6 | 133.6 | 154.2 | 160.9 | 168.2 | 177.9 | 185 | 194.7 |
| 50 | 83.3 | 86.9 | 90.9 | 104.2 | 108.7 | 113.64 | 120.2 | 125 | 131.6 | 144.1 | 180.5 | 208.3 | 217.4 | 227.3 | 240.4 | 250 | 263.2 |
| 75 | 125 | 130.4 | 136.4 | 156.3 | 163 | 170.45 | 180.3 | 187.5 | 197.4 | 216.1 | 270.76 | 312.5 | 326.1 | 340.9 | 360.6 | 375 | 394.7 |
| 100 | 166.7 | 173.9 | 181.8 | 208.3 | 217.4 | 227.3 | 240.4 | 250 | 263.2 | 288.2 | 361.01 | 416.7 | 434.8 | 454.6 | 480.8 | 500 | 526.3 |