Custom Autoformers are designed to provide system power

Designed in a collaborative effort between your staff and ours, designs are available in:

  • Either Step-Up or Step-Down,
  • Single-phase and three-phase,
  • Multiple primary or secondary voltages accomodated,
  • Available open frame or in a NEMA rated enclosure,
Contact a sales representative Specifying your transformer
Power Rating 50VA up to 1.5MVA
No. of Phases 1
Frequency 50/60Hz
400Hz up to 20kHz
Voltages Up to 600V Standard
For higher voltages, visit our high voltage transformer page.
Common Taps (Vrms) 180 | 200 | 208 | 220 | 240 | 260 | 280
380 | 400 | 440 | 480 | 500 | 600
Specific taps and ± taps can be accommodated
Other Options Enclosures
Circuit breakers
EMO switches
Low impedance
K-factor rated


Auto transformer assembly Autoformer Assembly

15kVA Transformers

  • Auto transformer used in electric car charging stations
  • Autoformer assembly used in electric car charging equipment
Autoformer assembly used in electric car charging equipment
Power Rating 4x 160kVA
No. of Phases 3
Frequency 60 Hz
Input 600Vrms ±5% taps wye
Output 480Vrms at 193Arms
Features NEMA3R enclosure
Certifications NRTL to UL 1561