What we buy
Ranges we buy on this page
Transformer Buyers NC buys used, surplus, failed and obsolete 138 kV class transformers across North Carolina. This page covers identification, insulation, testing and removal of these large transmission assets, particularly at substations in the eastern and central counties.
It is written for utility asset managers, plant engineers, contractors and trustees handling a retired transformer, a failed winding or a substation replacement that leaves a heavy tank behind.
| Phase | kVA | Voltage | Fluid |
|---|---|---|---|
| 1 or 3-phase | 25 - 20,000 kVA | 138 kV Class | Liquid or dry |
| 3-phase | 75 - 10,000 kVA | up to 34.5 kV | Liquid-filled |
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 138 kV Class class
The 138 kV class is a transmission standard on the eastern seaboard. Equipment in this class transfers power between transmission circuits and lower-voltage systems.
A purchase review starts with the nameplate, because the primary voltage alone does not identify winding connections, capacity or tap range.
A 138 kV transformer may have a separate secondary winding, a tertiary winding or an autotransformer arrangement. Those distinctions matter during identification.
Record every nameplate voltage, the MVA ratings for each cooling stage, the connection diagram and the serial number before drawings leave the substation office.
Local reality
Where 138 kV Class equipment sits in North Carolina
In North Carolina, this class belongs in transmission substations, including sites in the eastern and central counties. The transformer may stand behind a fenced bus yard with overhead conductors, disconnect switches and surge arresters.
Access to that yard often requires coordination with the operating utility.
Retirement of a 138 kV unit can follow a station rebuild, a changed transmission arrangement or a winding failure.
At an eastern or central county site, photographs should show the transformer bay, gate, gravel approach and nearby energized equipment, not just the front of the tank.
Around the site
Insulation, BIL and clearance
A BIL around 650 kV is associated with 138 kV class equipment, but the actual rating must come from the nameplate or original drawings. Basic impulse insulation level describes impulse withstand capability.
It is not the operating voltage, and it does not establish a removal clearance.
Long bushings and their surrounding air clearances shape a 138 kV transformer bay. A cracked porcelain shed, damaged terminal or leaking bushing flange deserves a close photograph.
During removal, the utility must establish safe boundaries around adjacent conductors; equipment dimensions alone cannot determine those working limits.
Where it sits
Testing at this voltage
For a retired 138 kV transformer, useful records include winding resistance, ratio, insulation power factor and bushing test results. Compare reports with earlier readings where available.
A single passing measurement does not erase a fault history, especially after a differential trip or an internal pressure event.
Oil records help explain what happened inside the 138 kV tank. Dissolved gas analysis, moisture results and dielectric breakdown tests provide different evidence. Include sampling dates and any oil processing history.
After a winding fault, relay records and inspection notes may explain damage that photographs cannot show.
On the ground
Transport and handling
A 138 kV tank can be a rail shipment rather than a routine truck load. The shipping drawing should identify transport weight, dimensions, center of gravity and permitted lifting points.
Do not substitute total operating weight for shipping weight after oil, radiators and bushings are removed.
At a North Carolina transmission yard, the route from pad to gate can decide the handling plan. Check buried ducts, culverts, turning space and overhead obstructions.
Rail access requires a separate review; a nearby track does not establish that a suitable siding or unloading location exists.
Local reality
What changes the value
The assessment of a 138 kV transformer depends on its identity, condition and removal requirements. An intact core and winding assembly presents a different case from a tank opened after an internal arc.
Missing bushings, detached radiators and an undocumented tap changer also change the review.
Documentation can distinguish a serviceable retired 138 kV unit from one with unresolved damage. Provide the nameplate, maintenance history, fault reports and oil analysis, including PCB information where applicable.
Tank leaks, inaccessible lifting lugs and a restricted substation exit must be recorded alongside the electrical condition.
Around the site
Starting a sale
Begin with the 138 kV nameplate and a clear statement of ownership or authority to release the transformer. Send the North Carolina site location, retirement reason and current status.
Distinguish a disconnected unit from one still connected to the bus or awaiting an approved outage window.
Transformer Buyers NC buys these 138 kV assets, including failed and obsolete units. The initial review needs overall photographs, shipping information and any limits on site access.
Removal planning must establish responsibility for isolation, oil handling, accessory removal and loading before a crane or rail movement is scheduled.
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 every 138 kV transformer have 650 kV BIL?
No. Around 650 kV is a useful reference for this class, not a substitute for the actual insulation rating. Check the transformer nameplate, bushing nameplates and original drawings. Different terminals on the same transformer can have different insulation requirements.
Service area
Can a failed 138 kV transformer be reviewed?
Yes. Transformer Buyers NC buys failed 138 kV units. Provide the fault date, relay reports, oil test results and photographs of visible damage. State whether the tank has been opened and whether the core, windings, bushings or tap changer have been removed.
Payment
Is rail transport required for every 138 kV unit?
Not necessarily. A 138 kV tank may require rail shipment, but the shipping dimensions, weight and route determine the plan. Original transport drawings are important. Road access, bridge restrictions, siding suitability and the transfer between the substation pad and transport equipment need separate checks.
Logistics
Testing at this voltage: what should a seller know?
For a retired 138 kV transformer, useful records include winding resistance, ratio, insulation power factor and bushing test results. Compare reports with earlier readings where available.