Variable Auto Transformer

⚙️ Power Conditioning Equipment

Adjustable output voltage transformer for testing and industrial applications offering smooth stepless voltage control from 0 to 270V with precision and flexibility.

⚡ Single Phase & Three Phase

🌡️ Air Cooled

📊 0.5 KVA to 20 KVA

🇮🇳 All India Delivery

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✓ Quality Assured — All products tested before dispatch

✓ Pan India Delivery — Installation support available

Product Overview

What is Variable Auto Transformer?

Key Highlights

            ✓
            Smooth Stepless Control
          

            ✓
            High Efficiency
          

            ✓
            Durable Construction
          

            ✓
            Calibrated Scale
          

            ✓
            Overload Protection
          

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Features

Key Features of Variable Auto Transformer

🎚️

Smooth Stepless Control

0 to 270V continuous stepless voltage adjustment with precision calibrated dial.

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High Efficiency

95%+ efficiency with toroidal core design minimizing power losses during operation.

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Durable Construction

Heavy duty construction with high quality carbon brush for long service life.

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Calibrated Scale

Easy-to-read calibrated voltage scale for accurate and repeatable voltage settings.

🛡️

Overload Protection

Built-in thermal overload protection prevents damage from overload conditions.

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Industrial Grade

Heavy duty industrial grade construction for continuous professional use.

Specifications

Technical Specifications

Parameter	Specification
Type	Variable Auto Transformer (Variac)
Phase	Single Phase / Three Phase
KVA Range	0.5 KVA to 20 KVA
Input Voltage	230V (Single Phase) / 415V (Three Phase)
Output Voltage	0 to 270V (Variable)
Frequency	50 Hz
Core Type	Toroidal Core
Standards	IS/IEC Standards

Applications

Applications of Variable Auto Transformer

Our Variable Auto Transformer is widely used across various industries and applications.

🔬

Laboratories

Voltage variation testing, component testing and research experiments

🏭

Industrial Testing

Factory testing of electrical equipment, motors and appliances

⚙️

Motor Speed Control

Variable speed control for AC motors in industrial applications

🎓

Educational Institutes

Physics and electrical engineering laboratory demonstrations

🔌

Equipment Testing

Burn-in testing, quality control and acceptance testing of products

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Field Testing

On-site commissioning and testing of electrical installations

Why Dynavolt

Why Choose Dynavolt Variable Auto Transformer?

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35+ Years Manufacturing

Decades of expertise in designing and manufacturing reliable power conditioning equipment for Indian industries.

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Quality Tested Products

Every unit undergoes rigorous quality testing before dispatch ensuring long-term reliable performance.

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Custom Specifications

We manufacture as per your specific KVA, voltage, and installation requirements with OEM flexibility.

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Pan India Service

Installation, commissioning and after-sales service available across all major cities in India.

FAQ

Frequently Asked Questions

Common questions about Variable Auto Transformer

What is a variable auto transformer or variac? ▾

A variac is a variable auto transformer with a sliding brush contact on a toroidal winding allowing smooth stepless voltage adjustment from 0V to 270V for testing and industrial applications.

What is the output voltage range of your variac? ▾

Dynavolt variacs provide 0 to 270V stepless output from 230V input. Three phase models provide 0 to 470V from 415V input. Custom ranges available on request.

Can variac be used for motor speed control? ▾

Yes, variacs are commonly used for speed control of single phase AC motors in industrial and laboratory applications. Output voltage variation directly controls motor speed.

What is the difference between variac and dimmerstat? ▾

Variac and dimmerstat are the same device - a variable autotransformer. Both names refer to the same product that provides stepless voltage control from 0 to maximum output voltage.

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+91 88 602 80868

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Variable Auto Transformer Manufacturer