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Transformer

Continuously Variable Voltage Auto Transformers

Overview

Precise Voltage Control for Industrial & Testing Applications

A Continuously Variable Voltage Auto Transformer, also known as a Variac or Dimmerstat, provides stepless AC voltage control by using a movable carbon brush over the winding surface. This allows output voltage to be adjusted smoothly from zero to rated voltage, or above rated voltage in selected designs.

These transformers are commonly used for voltage adjustment, testing equipment, calibration, R&D work, motor control, lighting control, heaters, furnaces, and industrial process applications. They are valued for smooth regulation, high efficiency, compact design, and dependable voltage control.

Bhasin Packard manufactures Continuously Variable Voltage Auto Transformers with robust construction, quality winding, smooth operation, and custom design options to meet different voltage, current, phase, and load requirements.

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Key Features

Smooth and stepless voltage variation

Precise AC output voltage control

High efficiency with low electrical losses

Robust construction for long service life

Smooth carbon brush and commutator operation

Suitable for testing and calibration applications

Available in single-phase and three-phase options

Custom design as per voltage and load requirement

Technical Specifications

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Applications

Testing & Calibration Equipment

Provides stable control voltage for safe panel operations.

Laboratories & R&D Centers

Supports automated equipment with reliable low-voltage power supply.

Motor Speed Control

Ensures precise machine control with stable electrical output.

Lighting Control Systems

Powers control devices for smooth machinery operation.

Ovens, Heaters & Furnaces

Delivers consistent voltage for accurate PLC performance.

Electrical & Electronic Testing

Supports safe switching, protection, and control operations.

Process Control Equipment

Provides reliable control power for heating and cooling systems.

Voltage Stabilization Systems

Supplies stable voltage for accurate instrument operation.

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Get customized Continuously Variable Voltage Auto Transformer solutions designed for your voltage range, current rating, phase, and application requirements.