What we buy
Ranges we buy on this page
Transformer remanufacturing can mean new windings and insulation, or a narrower repair that leaves the original core and coils intact. This guide explains what a rebuilder actually replaces and how a rebuild date affects an equipment assessment.
| Phase | kVA | Voltage | Fluid |
|---|---|---|---|
| 1-phase | 10 - 333 kVA | up to 25 kV | Liquid or dry |
| 3-phase | 75 - 20,000 kVA | 46 kV | Liquid or dry |
Who we buy from
Six kinds of seller
- Recyclers
- Electrical contractors
- Equipment dealers
- End users
- Demo contractors
- Distributors
Fast offers
A written offer the same business day, based on your photographs.
Dedicated logistics
Our own crew, trailer and crane, not a brokered haul.
No broker fees
One buyer from first call to cleared pad, with nothing skimmed.
How it works
Six steps from photograph to payment
- 01
Take pictures
Photograph the nameplate, the inside of the cabinet and the tank from both ends. Four frames on a phone are enough to price most units.
- 02
Send them to us
Email or text the photographs with the site address and whether the unit is still energised. We reply the same business day with questions or a number.
- 03
Review the offer
The offer names the unit, the site, the price and the pickup window. It is written, dated and good for thirty days unless the unit changes hands.
- 04
We schedule freight
A crew, a trailer and a crane if the pad needs one. You get the date and the arrival window, and the site does not have to close for it.
- 05
Testing on arrival
Winding resistance, insulation resistance and a turns ratio check, plus oil analysis where the unit is liquid-filled. Results travel with the unit.
- 06
Get paid
Payment is released against the signed bill of sale and the scale ticket, by check or ACH, with the paperwork copy left on site.
What we handle
The parts sellers dread
Rigging
Crane, skates and a route survey for anything that will not roll onto a trailer.
Oil containment
Pans, absorbent and a spill plan before a drain plug is touched.
Bill of sale
A document that clears a lien, a lease or a bankruptcy file, not a handwritten note.
PCB paperwork
Testing and manifesting for pre-1979 oil, handled before the unit moves.
On the ground
The short version
A remanufactured transformer is not automatically a new transformer inside an old tank. The work may include rewinding coils, replacing solid insulation, repairing the core, renewing bushings, and sealing the tank.
The shop's scope of work establishes which parts changed and which original assemblies remained.
Oil processing, fresh paint, and new gaskets can improve condition without constituting a complete rebuild. On a 13,200-volt primary unit, ask whether the shop opened the active assembly, replaced winding insulation, or only treated the fluid.
A dated invoice should distinguish those operations rather than group them under restoration.
Local reality
Why a seller should care
For an owner clearing a Raleigh plant yard, the original manufacture date tells only part of the story. A documented rewind can change the assessment of insulation condition and service history.
A paint date cannot establish winding age, even if the radiator panels look recently finished.
Transformer Buyers NC buys used, surplus, failed, and obsolete transformers across North Carolina. For a remanufactured unit, the useful records include the original nameplate, rebuilder plate, winding data, and final test report.
Those documents help separate an identified rebuild from an undocumented repair before removal planning begins.
Around the site
The arithmetic
Keep three dates separate: original manufacture, completed rebuild, and return to service. A transformer built in 1998, rewound in 2016, and disconnected in 2024 has a 1998 tank and core unless records say otherwise.
Its replacement windings have a different history from those retained metal assemblies.
Elapsed years are only one part of the calculation. Count service years after the rebuild separately from years sitting idle in a Greensboro warehouse. Then examine loading records, oil results, and storage conditions.
Eight calendar years do not establish eight equivalent years of thermal aging in winding insulation.
Where it sits
Where people go wrong
A second nameplate can record a rating change without proving every internal component was replaced. Compare kVA, primary voltage, secondary voltage, impedance, and cooling designation against the original plate.
A changed secondary connection may matter more to identification than a freshly stamped date on the tank wall.
Another mistake is treating one successful test as proof of the entire rebuild. Turns-ratio testing checks ratio and connection; it does not independently establish insulation life. Winding resistance, insulation measurements, dielectric testing where applicable, and leak checks address different concerns.
Read the actual results alongside the documented repair scope.
On the ground
Value impact
A recent rebuild date strengthens an equipment assessment only when the work and subsequent condition are documented. New coils with traceable test results carry different evidence from replacement bushings alone.
Retained core damage, tank corrosion, or repeated gasket leaks can still limit the unit's suitability for further service.
Failure after remanufacturing deserves its own explanation. A cracked porcelain bushing during handling is not the same event as an internal winding fault after energization. Preserve relay targets, inspection notes, and oil sample results where available.
The failure mode can outweigh the apparent youth of the rebuilder's plate.
Local reality
Your next move
Build a record packet before a demolition crew disconnects cables or removes identification plates. Include legible photographs of both plates, the complete shop report, oil records, and the reason for removal.
Note whether bayonet fuses, elbows, radiators, or bushings were changed during the rebuild or afterward.
Keep the technical history separate from the lift plan. A Charlotte loading crew still needs total handling weight, dimensions, lifting-point condition, and access around the pad. Remanufacturing records do not certify lifting lugs or establish present readiness for energization.
Have qualified personnel evaluate isolation, fluid containment, and handling requirements.
Get started
Get an offer in minutes
Five fields is all it takes. Photographs help, but a nameplate and a town are enough to start.
No fee, no obligation. We reply the same business day.
Tell us what you have
We reply the same business day.
Questions
Straight answers
Equipment types
Does a rebuild date replace the manufacture date?
No. Record both dates and identify what the rebuilder retained. A 2019 rewind does not make the original tank, core, or tap changer 2019 components.
Service area
Which documents show what the rebuilder actually replaced?
Start with the scope of work, itemized repair report, winding specifications, and final test results. Compare those records with both nameplates.
Payment
Can a failed remanufactured transformer still be assessed?
Yes. Transformer Buyers NC buys failed transformers, including units with rebuild histories. Document the failure location and circumstances rather than describing the unit simply as rebuilt.
Logistics
Value impact: what should a seller know?
A recent rebuild date strengthens an equipment assessment only when the work and subsequent condition are documented. New coils with traceable test results carry different evidence from replacement bushings alone.