Industrial Dry-Type & Oil-Filled Transformer Specialists

Transformers are at the heart of modern power systems—quietly working behind the scenes to keep industries, municipalities, and commercial facilities running. In power generation, high-voltage transformers “step up” voltage to efficiently transmit electricity across long distances. Transmission networks rely on these units to minimize line losses by reducing current and shrinking the conductor size required over hundreds of miles. As electricity reaches electrical substations, “step-down” transformers safely reduce voltage for distribution. Finally, distribution transformers deliver usable power to plants, buildings, and homes.

Once power enters an industrial or commercial facility, the role of transformers becomes even more diverse. Inside manufacturing plants, utilities, hospitals, and municipal systems, transformers regulate voltage for:

• Machinery and production equipment

• Lighting and HVAC systems

• Motor control centers (MCCs)

• Drives, instrumentation, and PLC-based control panels

• Sensitive electronics and IT infrastructure

While smaller transformers are often cheaper to replace than repair, medium- and low-voltage industrial transformers, inductors, chokes, coils, and autotransformers are high-value assets. Their failure can mean costly downtime, safety risks, and operational losses. That’s why professional transformer repair, rewinding, and testing services are critical for long-term reliability, safety, and efficiency.

A&W Electric — Trusted Experts in Transformer Repair & Rewinding

A&W Electric provides comprehensive transformer repair services for dry-type and oil-filled units used in industrial, municipal, and commercial environments. With decades of experience across a wide range of transformer technologies, we work on:

• Dry-type transformers (VPI, VPE, Cast Coil, Open Wound)

• Oil-filled transformers and substation transformers

• Inductors, reactors, chokes, coils, and magnetics

• Autotransformers and custom wound components

Our skilled technicians deliver complete solutions both onsite and in our fully equipped repair centers, designed to restore your equipment to peak operating condition.

Comprehensive Transformer Repair & Rewind Capabilities

Our services cover every stage of transformer care—from fault diagnosis to complete refurbishment:

• Transformer Rewinding & Coil Rewinding

We rewind primary, secondary, and tertiary windings using modern insulation systems, upgraded conductor materials, and engineered winding designs to match or exceed OEM performance.

• Core & Coil Replacements

Complete core and coil builds for heavily damaged, shorted, or burned units. We also provide redesign options for efficiency improvements.

• Dry-Type & Oil-Filled Transformer Repair

Repair services include mechanical restoration, electrical troubleshooting, insulation replacement, and thermal system improvements.

• Leak Repair, Gasket Replacement & Tank Service

For oil-filled units, we diagnose oil leaks, replace gaskets, repair tank defects, and restore cooling systems.

• Oil Processing, Dehydration & Purification

Using state-of-the-art oil processing systems, we remove moisture, acids, and contaminants. Services include:

• Vacuum dehydration

• Oil filtration

• Degassing

• Full oil replacement or reconditioning

• Insulation Upgrades & Transformer Redesign

We upgrade insulation classes, redesign coils, and apply modern materials to increase lifespan, reliability, and thermal performance.

• Transformer Testing & Diagnostics

A&W performs industry-standard testing to accurately evaluate transformer health:

• Turns ratio testing (TTR)

• Megger & insulation resistance

• Winding resistance

• Power factor / dissipation factor (DF/PF)

• Hi-pot testing

• Leakage reactance testing

• Thermal imaging

• Oil sampling & DGA (Dissolved Gas Analysis)

Testing allows us to identify early-stage issues such as insulation breakdown, moisture intrusion, partial discharge, hot spots, or winding deformation.

• Emergency Transformer Repair Services

When a failure occurs, rapid response is critical. We provide expedited repair, onsite diagnostics, temporary power solutions, and—when needed—rental or replacement units to minimize downtime.

Reverse Engineering & Obsolete Transformer Solutions

Many facilities operate aging transformers that are no longer supported by the OEM. A&W Electric provides complete reverse-engineering capabilities, including:

• Dimensional and electrical replication

• Core and coil redesign

• Efficiency upgrades

• Improved thermal and insulation performance

• Modern material replacements for discontinued parts

This ensures legacy systems can remain operational without costly redesigns of downstream equipment.

Why Transformer Repair Matters

Routine maintenance, timely testing, and professional refurbishment provide substantial operational benefits:

• Reduced downtime & production loss

• Lower lifecycle cost vs. replacement

• Extended equipment lifespan

• Improved energy efficiency

• Enhanced reliability & power quality

• Safer operation and compliance with electrical standards

Transformers often fail due to insulation breakdown, overheating, contamination, moisture, loose connections, vibration, or overloading. Proper repair and testing help detect these issues early and prevent catastrophic failure.

Dependable Transformer Repair for Industrial & Municipal Operations

From preventative maintenance and oil sampling to complete rewinds and emergency repairs, A&W Electric delivers high-quality transformer repair and rewind services tailored to your operation. Our experienced technicians, advanced diagnostic tools, and fully equipped repair centers ensure your transformers return to service quickly, safely, and with long-term reliability.

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