Transformer Repair & Specialty Coil Winding Services

Reliable transformers and properly engineered coils are essential to the performance, safety, and efficiency of every electrical system. At A&W Electric, we provide comprehensive transformer repair and specialty coil-winding services designed to restore aging equipment, solve performance issues, and support unique or custom applications across industrial, commercial, and municipal environments.

Why Transformers Matter

Transformers are the backbone of power distribution. They safely step voltage up or down to match the needs of production equipment, HVAC systems, control circuits, and sensitive electronics. Over time, heat, vibration, insulation breakdown, contamination, and electrical faults can degrade a transformer’s performance.

Replacing a transformer is not always practical—especially if the unit is specialty, custom-built, or no longer manufactured. Repairing or rewinding is often the fastest, most cost-effective way to return your equipment to reliable operation.

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Transformer Repair & Rewinding

Our repair services extend the life of dry-type and oil-filled transformers used throughout manufacturing plants, utilities, municipalities, commercial buildings, and OEM systems. Whether you’re dealing with overheating, insulation failure, shorted windings, or physical damage, our technicians assess the root cause and engineer a long-term solution.

Our transformer repair capabilities include:

• Complete rewinding of primary and secondary windings

• Coil replacement and redesign for improved efficiency or reliability

• Insulation upgrades to modern Class F, H, or higher materials

• Core repair, cleaning, and re-stacking

• Lead, bushing, and termination repairs

• Thermal and electrical testing to verify performance

• Reverse engineering of obsolete or undocumented units

• On-site troubleshooting and field repair services

Every unit is tested before leaving our facility to ensure it meets or exceeds original performance specifications.

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Specialty Coil Winding

Not all coils are standard—and not all winding shops understand the performance requirements of specialty magnetics. American MTS manufactures and rebuilds custom coils for applications where precision, durability, and electrical integrity are critical.

We design and wind coils for:

• Industrial control circuits

• Transformers and autotransformers

• Inductors, reactors, and chokes

• Motor starting and power-conditioning equipment

• High-temperature and high-vibration environments

• Legacy systems requiring discontinued coils

Coil-winding capabilities include:

• Copper and aluminum windings

• Layer, random, and segmented windings

• High-temperature insulation systems

• Vacuum-pressure impregnation (VPI)

• Precision resistance and inductance matching

• Emergency and expedited rebuilds

• Engineering support for redesign or optimization

Whether you need a single replacement coil or a complete set of matched windings, our process ensures accuracy, repeatability, and long-term reliability.

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Repair vs. Replace: Making the Right Choice

Many engineers and maintenance teams assume a failed transformer or coil must be replaced. In reality:

• Most units are fully repairable

• Rewinding restores electrical integrity to like-new condition

• Upgraded insulation often improves thermal performance beyond OEM levels

• Repair avoids long OEM lead times and costly system changes

Our team evaluates your damaged or failing unit and provides clear options—including repair, rewind, redesign, or replacement—so you can make the best operational decision.

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Diagnostics & Testing

Every repair and rewound component is tested using industry-standard electrical and mechanical methods.

Testing capabilities include:

• Insulation resistance (Megger)

• Turns-ratio testing (TTR)

• Winding resistance

• Hi-pot / dielectric withstand

• Core loss and exciting current

• Surge comparison testing

• Thermal inspections

Documentation is included to support maintenance records, QA programs, and reliability initiatives.

Industries We Serve

Our transformer and specialty coil services support a wide range of environments, including:

• Manufacturing plants

• Utilities & substations

• Municipal water/wastewater

• Commercial buildings

• OEM and custom equipment

• Renewable energy facilities

• Transportation & infrastructure

If it contains a transformer or coil, we can repair it, rewind it, or build it to spec.

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Talk to a Specialist

If you have a failing transformer, a damaged coil, or a specialty winding requirement, our engineering and repair team can help. Provide your voltage, kVA, coil dimensions, or application details, and we’ll respond with repair options, testing recommendations, and an estimated turnaround.

A&W Electric delivers precision transformer repair and specialty coil-winding solutions that keep your operation running—safely, efficiently, and reliably.