Variable transformers are devices used in electrical power systems to adjust voltage levels. They are commonly employed in transmission and distribution networks to increase or decrease the voltage as required for efficient power transfer and utilization. These transformers offer the flexibility to vary the turns ratio and adjust the output voltage within certain limits, making them essential components in maintaining stable voltage levels under changing load conditions. Variable transformers play a crucial role in regulating voltage in industrial applications, ensuring reliable operation of electrical equipment and minimizing power losses.

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Staco 100 and 200 Series – Variable Transformers

  • Panel mount
  • Single Phase or three phase
  • 120 and 240 Volts
  • 0.8 – 3.0 Amperes
  • Adjustable shaft
  • 50/60 Hz

Staco 1000 and 1200 Series – Variable Transformers

  • Panel mount
  • Single phase and three phase
  • 120/240 Volts
  • 3.5 to 15 Amperes
  • 50/60 Hz
  • Motor-driven option available

Staco 1500 Series – Variable Transformers

  • Panel mount
  • Single phase and three phase
  • 120/240 Volts
  • 9.5 to 20 Amperes
  • 50/60 Hz
  • Motor-driven option available

Staco 2500 Series – Variable Transformers

  • Panel mount
  • Single phase and three phase
  • 120/240 Volts
  • 10 to 30 Amperes
  • Adjustable Shaft
  • 50/60 Hz
  • Motor-driven option available

Staco 3PN Enclosed Plug and Cord Series – Variable Transformers

  • All models are housed in a rugged steel enclosure and supplied with input line cord and plug with matching receptacle, on-off illuminated switch and fuse.
  • Available for 200, 500, 1000, 1500, J Series Variable Transformers

Staco 500 Series – Variable Transformers

  • Panel mount
  • Single phase and three phase
  • 120/240 Volts
  • 5/7 Amperes
  • Adjustable/Fixed Shaft
  • 50/60 Hz
  • Motor-driven option available

Staco 5000 Series – Variable Transformers

  • Single phase and three phase
  • 120/240/480 Volts
  • Up to 450 Amperes
  • Up to 244 kVA
  • Adjustable Shaft
  • 50/60 Hz
  • Motor-driven option available

Staco 6000 Series – Variable Transformers

  • Single phase and three phase
  • 120/240/480 Volts
  • Up to 540 Amperes
  • Up to 305 kVA
  • Adjustable Shaft
  • 50/60 Hz
  • Motor-driven option available

Staco Isolated J Series – Variable Transformers

  • Single phase
  • 120/240 Volts
  • Up to 25 Amperes
  • Up to 4.8 kVA
  • Adjustable Shaft
  • 50/60 Hz

Superior Electric 10C-12C Series – POWERSTAT Variable Transformers

POWERSTAT Variable Transformers of the 10C-12C Series are offered in single and three phase manually operated assemblies.