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550 Volt Single Phase Autotransformers

C. 550 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

550V Primary, Copper Wound, 1 Phase Autotransformers

kVA Select Secondary Voltage Below
600V 575V 480V 460V 440V 416V 400V 380V 347V 277V
3 Contact Contact Contact Contact Contact Contact Contact Contact Contact Contact
5 Contact Contact Contact Contact Contact Contact Contact Contact Contact Contact
7 Contact Contact Contact Contact Contact Contact Contact Contact Contact Contact
10 Contact Contact Contact Contact Contact Contact Contact Contact Contact Contact
15 Contact Contact Contact Contact Contact Contact Contact Contact Contact Contact
25 Contact Contact Contact Contact Contact Contact Contact Contact Contact Contact
37 Contact Contact Contact Contact Contact Contact Contact Contact Contact Contact
50 Contact Contact Contact Contact Contact Contact Contact Contact Contact Contact
75 Contact Contact Contact Contact Contact Contact Contact Contact Contact Contact
100 Contact Contact Contact Contact Contact Contact Contact Contact Contact Contact

Output Amps

kVA Output Amps at:
600V 575V 480V 460V 440V 416V 400V 380V 347V 277V
3 5 5.2 6.3 6.52 6.8 7.2 7.5 7.9 8.7 10.8
5 8.3 8.7 10.4 10.9 11.4 12 12.5 13.2 14.4 18.1
7 11.7 12.2 14.6 15.2 15.9 16.8 17.5 18.4 20.2 25.3
10 16.7 17.4 20.8 21.74 22.7 24 25 26.3 28.8 36.1
15 25 26.1 31.3 32.61 34.1 36.1 37.5 39.5 43.2 54.2
25 41.7 43.5 52.1 54.35 56.8 60.1 62.5 65.8 72.1 90.3
37 61.7 64.4 77.1 80.43 84.1 88.9 92.5 97.4 106.6 133.6
50 83.3 86.9 104.2 108.7 113.64 120.2 125 131.6 144.1 180.5
75 125 130.4 156.3 163 170.45 180.3 187.5 197.4 216.1 270.76
100 166.7 173.9 208.3 217.4 227.3 240.4 250 263.2 288.2 361.01