September 26, 2013

1.25 MVA Auto Transformer, P/N 6112A, Input 480 VAC, Output 440 VAC / 1640 Amps

Product Overview

The photo and schematic of the three auto transformer, 
part number 6112A is shown below. This is ideal for 480 to 440 step up applications. The unit is housed inside an indoor enclosure. Auto transformers are much cheaper than isolation transformers. A comparable isolation transformer will be 12 times bigger in size with higher cost.

480/400 Auto Transformer


  • 1.25 MVA Auto Transformer, 3 PH, 60 Hz, P/N 6112A
  • Input: 480 VAC, 1503 Amps, 3 PH, 60 Hz
  • Output: 440 VAC, 1640 Amps, 3 PH, 60 Hz
  • Copper bus bars are 4” x 3/8” with two holes
  • P/N 6112A consist of three single phase auto transformers (T1, T2 and T3) inside an indoor enclosure
  • Indoor Enclosure: 50” H x 36” W x 26” D
  • Comparable Isolation transformer will be 12 times bigger in size.

T1, T2 and T3 will be housed inside an indoor enclosure as shown below. The three neutrals will be joined together with jumpers J1 and J2. 

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L/C Magnetics is an Auto Transformer manufacturer. To discuss your specific application, please call us toll free at (800) 595-7096, or send us an email at

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