De Voltrans
Hero Background
Repair & Augmentation

Extend the life and performance of existing transformers without full replacement.

Overview

Repair & Augmentation

DeVoltrans Private Limited offers comprehensive Repair & Augmentation Services to extend the operational life and enhance the performance of power transformers. Covering the full lifecycle of transformer maintenance, our solutions range from routine repairs to complete refurbishment, MVA uprating, and vector group conversions. By restoring and upgrading existing assets, we help utilities and industries improve efficiency, reliability, and capacity — at a fraction of the cost of new equipment. Our services are executed with precision, adhering to the highest industry standards and quality protocols.

Max Voltage400 kV
Repair & Augmentation
Up to 400 kV
Service TypeIn-house & On-site

Service Specifications

Complete Transformer Refurbishment and Rehabilitation
MVA Rating Upgrades and Capacity Enhancement
Vector Group Modification and Reconfiguration
Rewinding of HV and LV Windings
Insulation System Replacement and Upgrades
Core Repair and Reconditioning
OLTC and OCTC Overhauling
Oil Filtration, Reclamation, and Replacement
Bushing Repair and Replacement
Leak Rectification and Tank Repairs
Retrofitting and Modernization
Condition Assessment and Diagnostic Testing
On-Site Troubleshooting and Emergency Repairs
Why Choose Us

Why Choose Our Transformers

Superior Engineering Excellence

Designed using advanced tools and industry best practices to ensure optimal performance and longevity.

Proven Short-Circuit Withstand Capability

Engineered to endure severe electrical and mechanical stresses, ensuring enhanced grid reliability and safety.

NABL-Accredited Testing Facility

Every transformer undergoes stringent testing to guarantee quality, performance, and compliance.

Compliance with International Standards

Designed and manufactured in accordance with IEC, IS, and ANSI standards for global acceptance.

Energy-Efficient and Low-Loss Designs

Optimized for reduced losses, lower lifecycle costs, and sustainable performance.

Robust Construction and Long Service Life

Built with high-quality materials to ensure durability in demanding operating conditions.

Customized Solutions for Diverse Applications

Tailor-made transformers to meet specific project and industry requirements.

Advanced Manufacturing and Quality Assurance

Modern facilities and rigorous quality control processes ensure precision and consistency.

Comprehensive After-Sales Support

Dedicated technical assistance for installation, commissioning, maintenance, and troubleshooting — ensuring reliable performance throughout the transformer's lifecycle.

Explore More

Our Product Range

Power Transformers
Up to 400 kV

Power Transformers

DeVoltrans Private Limited manufactures high-capacity power transformers designed for reliable and efficient operation across national and regional transmission networks. Engineered using advanced design methodologies and premium-grade materials, our transformers deliver superior electrical performance, high thermal stability, and robust mechanical strength. Each unit is customized to meet specific project requirements and complies with internationally recognized standards. Designed for long service life and dependable performance under demanding grid conditions, DeVoltrans transformers are ideal for utilities, power generation plants, substations, and large-scale industrial applications.

Explore →
Auto Transformers
Up to 400 kV

Auto Transformers

DeVoltrans Private Limited manufactures high-performance Interconnecting Transformers (ICTs) designed to facilitate efficient and reliable power transfer between networks operating at different voltage levels. These transformers play a critical role in ensuring grid stability, optimal load sharing, and seamless integration of regional and national transmission systems. Engineered for superior electrical performance and mechanical robustness, our ICTs comply with international standards and are tailored to meet the specific requirements of utilities and transmission operators.

Explore →
Generator Transformers
GSU · Up to 400 kV

Generator Transformers

DeVoltrans Private Limited manufactures high-performance Generator Step-Up (GSU) Transformers, designed to efficiently step up voltage from power generators to transmission levels. Built for reliability and operational stability, these transformers play a critical role in connecting power plants to the grid. Our GSU transformers are engineered to withstand thermal, electrical, and mechanical stresses associated with power generation systems, ensuring dependable performance and long service life.

Explore →
Special Transformers
Solar · Wind · Furnace · Loco

Special Transformers

DeVoltrans Private Limited offers a comprehensive range of Special Transformers engineered for applications where conventional oil-filled transformers are insufficient. Designed to address unique electrical, thermal, and mechanical challenges, each unit is custom-built to meet specific operational requirements. Our special transformers are developed to withstand harmonic distortions, fluctuating loads, and demanding environmental conditions, ensuring optimal performance, durability, and efficiency across critical industrial and infrastructure applications.

Explore →
Ester-Filled Transformers
Up to 250 MVA

Ester-Filled Transformers

DeVoltrans Private Limited manufactures advanced Ester-Filled Transformers designed to deliver superior fire safety, environmental sustainability, and reliable performance for modern power infrastructure. Unlike conventional mineral oil transformers, ester-filled transformers use biodegradable and high fire-point insulating fluids, making them ideal for installations in environmentally sensitive, densely populated, and high-risk locations. Engineered for enhanced thermal performance and extended insulation life, these transformers provide improved overload capability, reduced environmental impact, and greater operational safety. Designed in compliance with international standards, DeVoltrans ester-filled transformers are suitable for utilities, renewable energy projects, transportation systems, commercial infrastructure, and industrial applications where safety and sustainability are critical.

Explore →
AluCop Transformers
Up to 100 MVA

AluCop Transformers

DeVoltrans Private Limited manufactures high-performance AluCop Transformers engineered to provide an optimized balance between performance, weight reduction, and cost efficiency. Designed using a combination of aluminum and copper conductor technology, AluCop transformers offer reliable electrical performance while reducing overall material cost and transformer weight. These transformers are specifically developed for applications requiring economical and efficient power solutions without compromising operational reliability. Built with advanced engineering practices and high-quality insulation systems, DeVoltrans AluCop transformers deliver dependable performance across utilities, industrial facilities, renewable energy systems, and infrastructure projects.

Explore →

NeedRepairorRetrofitServices?