Variable Transformer 120-600 VAC, up to 1000 kVA


Staco - 1010B transformer

Staco Energy Products’
full range of variable transformers offer the exceptional versatility and
reliability required for so many of today’s voltage control applications in
both industrial and laboratory environments.

Unlike a standard
fixed ratio transformer, a Staco variable transformer is designed to provide
variable output voltage that can be adjusted from 0 to 117% of the unit’s input

Staco Energy Products
Co. offers a wide range of standard models including the following:

  • Panel mount, single phase (fixed
    and adjustable shaft)
  • Enclosed cord and plug
  • Metered
  • Fully enclosed
  • Ganged
  • Isolated
  • Isolated portable cord and plug
  • “Quick-Step”
  • Motor driven
  • Cased

A basic Staco variable
transformer consists of a copper winding on a toroidal core of laminated,
grain-oriented, silicon steel. A carbon brush, connected to an output terminal,
is rotated over the length of a precision-ground, precious metal-plated, commutator
track to tap off voltage at any turn from zero volts to the maximum output
voltage of the winding.