The Superior Electric 136-BP57515 is a single-phase variable autotransformer that delivers continuously adjustable AC voltage output from 0–140 V at up to 20 A continuous current. This open-construction unit accepts 120 VAC input at 50/60 Hz and produces 2.8 kVA of power, making it suitable for precise voltage control in laboratory, test, and industrial applications.
Technical Specifications
• Input: 120 VAC, 50/60 Hz
• Output Voltage: 0–140 VAC (continuously adjustable)
• Current Rating: 20 A continuous, 20 A maximum
• Power Rating: 2.8 kVA
• Phase Configuration: Single phase
• Turns Ratio: 1:12 (adjustment range indicator)
• Termination: Screw terminals
• Mounting: Surface mount with multiple hole sets for flexible installation
• Physical Dimensions: 7.50 inches height × 15.12 inches width × 9.81 inches depth
– Key Features
• POWERKOTE® epoxy-coated coils resist fungus, salt spray, and environmental contaminants
• Movable brush-taps ride on commutators with special carbon brushes for extended service life
• Low operating torque from smooth commutator surface and consistent brush-tap pressure
• Open construction promotes heat dissipation during extended operation
• Bidirectional knob rotation (clockwise and counterclockwise) for intuitive control
• Heavy-duty mechanical construction with high overload capacity
– Typical Applications
Variable autotransformers of this class serve voltage regulation, power conditioning, and AC power distribution in manufacturing, industrial controls, and test environments. The 0–140 V adjustable range and 20 A capacity support equipment testing, prototype development, and precision power delivery where stable voltage control is critical.
– Compatibility & Integration
Screw terminal connections integrate with standard industrial wiring. Surface-mount design accommodates panel or chassis installation. Motor-drive options are available for automated or remote voltage adjustment in production and test setups.
