What we buy
Ranges we buy on this page
A step-down transformer lowers voltage from a distribution or sub-transmission level to a service level.
Transformer Buyers NC buys used, surplus, failed and obsolete step-down transformers statewide. A 13,200-to-480Y/277-volt unit serving a plant requires different handling and documentation than a campus transformer feeding older 208Y/120-volt panels.
| Phase | kVA | Voltage | Fluid |
|---|---|---|---|
| 3-phase | 5 - 100 MVA | 230 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 unit itself
Step-down describes the voltage relationship, not the enclosure. The unit may sit inside a pad-mounted cabinet, occupy a fenced substation or stand as a dry-type assembly in an electrical room.
Its nameplate identifies primary and secondary voltages, kVA, phase, frequency and connection details needed to distinguish the actual winding arrangement.
A common industrial example reduces 13.2 kV to 480Y/277 volts for motors, lighting and building distribution. Other installations reduce 4,160 volts to 208Y/120 volts.
These are the most common industrial units we buy, and a clear nameplate photograph usually makes the initial equipment assessment simpler than for specialized transformer designs.
Local reality
Where you find step-down in this state
Step-down equipment appears throughout North Carolina industrial services, campuses and large commercial buildings. At a Piedmont manufacturing plant, the transformer may feed a 480-volt switchboard beside production bays.
At a Raleigh campus, several units may divide incoming distribution voltage among laboratories, residence halls and mechanical buildings with different service requirements.
Hospital facilities in Charlotte or Greensboro often have step-down transformers tied to normal and emergency distribution arrangements. Coastal commercial sites may have outdoor cabinets with salt-related corrosion around hinges and radiator surfaces.
Ownership must be established before removal; a unit serving a building may belong to Duke Energy or another utility.
Around the site
Our inspection list
The first review covers the ratio, taps, impedance and the load profile the transformer served. Photograph the complete nameplate straight on, then capture terminal markings and the tap position indicator.
A 12,470-volt primary rating and a 480Y/277-volt secondary rating establish more than an exterior photograph of the cabinet alone can.
Service records explain what the nameplate cannot. Motor starting, sustained process loads and nonlinear loads can affect the interpretation of winding condition and past heating.
Inspection also covers cracked bushings, leaking radiator joints, damaged elbows, bayonet fuse compartments and evidence of arcing near the secondary terminals or internal cable connections.
Where it sits
Testing, oil and liability
For a retired 13.2-kV service transformer, useful records include transformer turns ratio results, winding resistance readings and insulation test reports. Test dates and methods matter.
A report from before a secondary fault does not establish present condition, and failed equipment should remain identified as failed even if its tank looks sound.
Oil-filled units require fluid identification and any available PCB analysis tied to the equipment serial number. Keep sampling reports, spill records and maintenance notes together.
A leaking gasket or wet concrete pad needs documented handling, not an assumption that draining the tank resolves environmental obligations. Dry-type units have no insulating oil.
On the ground
Load-out and haul
Removal starts with the electrical boundary: qualified personnel must isolate the primary and secondary, verify absence of voltage and establish required grounding. For a campus 480-volt service replacement, the outage sequence must also account for downstream sources.
Generator connections or other backfeed paths cannot be dismissed because the incoming feeder is open.
The lift plan uses actual shipping or measured weight, lifting points and site clearance. A substation unit with projecting radiators may need a spreader bar and lowboy rather than a simple forklift move.
Check the pad edge, overhead conductors, gate width and pavement capacity before positioning the crane or transport trailer.
Local reality
Valuation factors
Technical assessment begins with kVA, voltage ratio, winding material where documented, impedance and usable condition. A 13,200-to-480Y/277-volt nameplate gives a clear starting point, but missing bushings, contaminated oil or an undocumented winding failure changes the review.
Tap range and connection configuration help establish whether the unit matches its stated service duty.
Removal conditions belong in that assessment too. A disconnected transformer on an accessible concrete pad presents a different scope from an energized unit behind a hospital service yard. Nameplate photographs, oil records, dimensions and lifting details reduce uncertainty.
Failed or obsolete equipment can still be reviewed without treating it as serviceable.
Around the site
How to start the conversation
Begin with the North Carolina site location, ownership confirmation and a readable nameplate photograph. Include one image of the complete unit and another showing its pad or electrical room access.
Identify whether the transformer is energized, disconnected or failed, and describe the 480-volt or other secondary system it previously served.
For a plant closure or demolition schedule, include the planned isolation date and the contact responsible for switching and access. Note any oil leak, missing radiator, damaged bushing or restricted truck route.
Those details establish the inspection and pickup scope before equipment moves, especially where other contractors are working around the service.
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 assess a step-down transformer from photographs?
A readable nameplate photograph is usually the simplest starting point for this common industrial unit. Include primary and secondary voltages, kVA, impedance and serial number.
Service area
Do you buy failed industrial step-down transformers?
Yes. Transformer Buyers NC buys failed step-down transformers across North Carolina. Describe the failure, such as a secondary fault, winding damage or oil leak, and retain any test report. Keep the unit isolated and disclose fluid condition and missing components before removal planning begins.
Payment
Who confirms ownership before a campus transformer removal?
The campus owner or authorized representative should establish ownership from service agreements, asset records or utility confirmation. A transformer reducing utility distribution voltage to 480Y/277 volts may still be utility-owned.
Logistics
Testing, oil and liability: what should a seller know?
For a retired 13.2-kV service transformer, useful records include transformer turns ratio results, winding resistance readings and insulation test reports. Test dates and methods matter.