What we buy
Ranges we buy on this page
Transformer Buyers NC buys used, surplus, failed and obsolete mine-duty transformers anywhere in North Carolina. This page covers skid-mounted equipment built for underground workings, open pits and quarry service, including units with damaged cable entries or worn runners.
| Phase | kVA | Voltage | Fluid |
|---|---|---|---|
| 3-phase | 100 - 5,000 kVA | 15 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
What a Mine-Duty Transformers is
A mine-duty transformer is a ruggedized unit built for portable or semi-portable service underground or at a pit. Its enclosure and skid support repeated relocation near working faces, haul roads and excavation equipment.
Cable entries and grounding connections must withstand conditions unlike a fixed installation on a concrete pad.
The mine-duty designation does not establish winding construction, insulating medium or voltage by itself. Read the nameplate rather than assuming every skid-mounted enclosure contains the same equipment.
Record primary and secondary voltages, kVA, serial number and cooling designation, along with any attached switchgear or trailing-cable termination compartments.
Local reality
Where Mine-Duty Transformers turn up in North Carolina
The sand and gravel operations of the Sandhills can leave mine-duty units beside wash plants, pumping areas or retired excavation equipment. Sand packed around skid runners may conceal wear or corrosion.
Identify the working location and the present staging area separately, especially after equipment has moved between pits.
Feldspar mines in Mitchell County and quarries statewide are other places these units turn up. A transformer parked near a quarry bench may have damaged cable guards or stone lodged beneath its skid.
Site photographs should show access grades, overhead clearance and the route out of the work area.
Around the site
What we check before we quote
Our inspection starts with enclosure integrity, skid condition, cable entries and the grounding arrangement. Photograph dented panels, cracked seams, missing covers and worn runners.
At each cable opening, show glands, strain relief and abrasion marks that could indicate a trailing cable has pulled against the enclosure during relocation.
Grounding details need close views, not just a distant yard photograph. Document the grounding lug, conductor attachment and any damaged connection associated with the skid or enclosure. Include the nameplate and service records.
A crushed cable compartment or distorted skid can affect removal planning even when the windings remain intact.
Where it sits
Oil, PCBs and testing
First establish whether the mine-duty unit is liquid-filled or dry-type. For a liquid-filled tank, record fluid identification, visible leaks and any PCB documentation tied to its serial number.
Age or an unmarked drum beside the skid is not sufficient evidence of the fluid's PCB status or its identity.
Existing oil analysis, insulation-resistance results and winding test reports help describe a unit removed after a trip or cable fault. Keep report dates and equipment identifiers together.
Do not energize a mine-duty transformer solely for assessment, and leave sampling or electrical testing to personnel qualified for the equipment and site.
On the ground
Rigging, weight and transport
Mine-duty units are dragged, not lifted, during their intended relocation service, and their skids are the first thing to check. Examine runner wear, cracked welds and distorted tow points before movement.
Dragging a damaged skid across rock can open existing cracks or catch an unsupported edge beneath the tank.
Road loading requires a separate handling plan based on the manufacturer's instructions, verified weight and suitable attachment points. Do not assume a tow point is a lifting lug.
Document skid dimensions, cable-compartment projections and access for a lowboy, winch or other loading equipment before the transport crew reaches the quarry.
Local reality
What moves the number
The nameplate kVA number describes rated capacity, not the condition of a mine-duty transformer after years of dragging. Assessment also depends on voltage configuration, winding material when documented, enclosure damage and missing components.
A legible serial number connects the skid-mounted unit to maintenance records and any original drawings.
Completeness matters at the cable compartments and grounding connections as much as at the tank. Missing covers, severed leads, damaged insulators or stripped switching components change the scope of handling and evaluation.
Separate documented electrical failure from mechanical damage caused by towing, rock impact or prolonged storage on wet ground.
Around the site
When to call us about a mine-duty
Contact can begin when a Mitchell County mine retires a skid-mounted unit, a Sandhills pit changes its electrical layout or a quarry clears obsolete equipment. The transformer does not need to be operational.
Identify whether it remains connected, sits in an isolated work area or has already reached the laydown yard.
Before removal is scheduled, have the authorized site representative confirm ownership, disconnection status and access restrictions. Provide nameplate photographs, skid views and available fluid records for the specific mine-duty unit.
Transformer Buyers NC buys this equipment across North Carolina, with removal planning shaped by its condition and the site's loading route.
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
Can you buy a mine-duty transformer with damaged skids?
Yes. Damaged skids do not automatically exclude a unit from assessment. Show cracked welds, worn runners and bent tow points clearly. The damage must be considered before dragging or road loading, and the handling plan cannot rely on attachments whose condition is uncertain.
Service area
What records help identify a retired mine-duty unit?
Start with a readable nameplate photograph and the serial number. Add wiring drawings, maintenance reports, fault records and fluid documentation if applicable. For a unit moved between pits, identify its current location so records from an earlier working face do not confuse the assessment.
Payment
Should crews drag the transformer before an inspection?
Leave it in place until skid condition, tow points and the proposed route have been reviewed. Mine-duty equipment is designed for dragging, but worn runners or cracked welds can make another move unsafe. Record rock obstructions, slopes and cable connections before arranging relocation.
Logistics
Oil, PCBs and testing: what should a seller know?
First establish whether the mine-duty unit is liquid-filled or dry-type. For a liquid-filled tank, record fluid identification, visible leaks and any PCB documentation tied to its serial number.