Premium AC Voltage Regulation Systems
FEST VOLT Variable Autotransformers (Variac or Dimmer) provide smooth, stepless, and distortion-free AC voltage regulation. Engineered on high-grade toroidal cores wound with 100% copper to deliver maximum efficiency and thermal endurance.
Variac or Dimmer Manufacturer in Coimbatore, Tamil Nadu — Serving Tamil Nadu, Kerala & All Over India
Why FestVolt Autotransformers?
Our toroidal Variacs are built to the highest safety and electrical engineering standards, ensuring reliable power control across school benches and factory lines.
Stepless Control
Linear voltage adjustments without waveform distortion or step interruptions.
Self-Cleaning Contacts
High-conductivity carbon brush on a heavy swing-arm that cleans contact turns during manual turns.
High Efficiency
Near 100% efficient operation with minimal core losses compared to traditional series rheostats.
Electrolytic Copper
Toroidal wind made of 100% high-grade copper wires for superior thermal endurance.
Built on Advanced Toroidal Technology
Our autotransformers utilize high-permeability steel cores to minimize magnetizing current and core losses. The copper coil track is silver-plated or custom track-treated, reducing brush contact resistance and preventing sparking, which guarantees a long operational life.
Featured Catalog Models
As a trusted Variac or Dimmer manufacturer in Coimbatore, Tamil Nadu, FestVolt builds a versatile range of single-phase models in various ratings to fit school lab, R&D electronics benches, and industrial voltage stabilization — supplied to customers across Tamil Nadu, Kerala, and all over India.
8 Amp Single-Phase Variac
An 8 Amp Variable Autotransformer designed for efficient, distortion-free, and precise AC voltage regulation. It features a manual dial rota...
23 Amp Single-Phase Variac
The highest amperage catalog model, the 23 Amp Variable Autotransformer offers unmatched durability and high performance capabilities for he...
3 KVA Variable Autotransformer
A mid-level KVA Variable Autotransformer rated for a maximum capacity of 3 KVA, offering exceptional control precision.
Need custom voltage engineering?
We manufacture custom single-phase and three-phase autotransformers, motorized knobs for automated PLC remote controls, double-layer isolation models, and custom enclosed panel bench enclosures.
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