Amveco Auto Transformers - In applications calling for simple voltage step-up or step-down, and where there is no requirement for electrical isolation, applying an autotransformer will result in significant size and weight reductions as well as cost. The power rating of an autotransformer is given by the expression:

Prated = Pout X (Vhi - Vlow)/Vhi
Vlow = voltage from lower voltage tap (input or output)
Vhi = voltage across higher voltage tap (output or input)

Amveco Auto Transformer Web Sites:
Power Transformer Co: Amveco Auto Transformers -
Power Transformer Co. is the one stop resource for everything about power transformers.  The site provides information on everything from Amveco auto transformers, to transformer types, and even power transformer terms and definitions.

Amveco Transformer Web Sites:
Power Transformer Co: Amveco Transformers - All standard and custom inductors, current transformers and auto transformers are designed and manufactured to meet customer specifications and subjected to the the same demanding manufacturing standards used in the production of our toroidal transformers.

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Amveco Transformers -
The world leader in Toroidal power products.  Their state-of the art manufacturing process have made the use of toroids more cost-efficient across a broad spectrum of applications.