What we buy
Ranges we buy on this page
Transformer Buyers NC buys used, surplus, failed and obsolete K-factor transformers anywhere in North Carolina. This page covers the dry-type units installed for harmonic-rich loads, the records that help identify them, and the checks needed before removal.
| Phase | kVA | Voltage | Fluid |
|---|---|---|---|
| 3-phase | 15 - 1,000 kVA | 600 V | Dry-type |
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
A K-factor transformer is a dry-type unit rated to carry harmonic-rich loads without overheating within its specified operating limits. Its K-rating describes its ability to withstand additional heating associated with harmonic currents.
It does not mean the transformer removes those harmonics or corrects the downstream equipment producing them.
Nameplates may show K-4, K-13 or K-20 alongside kVA, primary voltage, secondary voltage and temperature rise. A 480-volt primary and 208Y/120-volt secondary is a familiar arrangement for electronic loads.
Record the actual markings rather than inferring a K-rating from a large enclosure or an oversized neutral terminal.
Local reality
Where you find k-factor in this state
North Carolina data centers and call centers use K-rated dry-type transformers where computers, communications equipment and other nonlinear loads share distribution circuits. In Charlotte or the Research Triangle, a retired unit may sit beside an active electrical room.
Removal planning must distinguish its feeder from adjacent circuits supporting operating equipment.
Offices full of electronics and hospitals also have these units, often serving 120-volt receptacle loads from a 208Y/120-volt secondary. Hospital facilities directors should identify the served panel and its system classification before disconnecting anything.
Panel schedules and one-line drawings help separate a retired transformer from circuits that remain in service.
Around the site
Our inspection list
We inspect the K-rating, winding temperature information, neutral sizing and the load profile the transformer actually saw. The nameplate temperature-rise rating is not a record of operating temperature.
Temperature logs, alarm history and infrared reports can show whether a nominally suitable K-rated unit repeatedly ran hot under its connected loads.
A K-rated unit is only worth its rating if the neutral was sized for the service, and that is checkable. Inspect the neutral terminal rating, conductor sizes and termination condition against the installation documents.
Triplen harmonics can add in the neutral, so heat discoloration there deserves attention even when phase terminals look clean.
Where it sits
Testing, oil and liability
These are dry-type transformers, so transformer-oil sampling is not part of the normal assessment. Check instead for winding contamination, insulation cracking, scorched leads and blocked ventilation openings.
A liquid-filled unit should not be classified as this equipment simply because someone describes its connected load as harmonic-rich or labels the circuit nonlinear.
Qualified personnel may use insulation-resistance, winding-resistance and turns-ratio tests as appropriate for the winding design and condition. Record test methods and temperatures with the results.
For a failed K-rated unit, include the fault report and protective-device operation; an open winding and a overheated neutral connection indicate different damage paths to investigate.
On the ground
Load-out and haul
Before a K-rated transformer leaves a hospital basement or office electrical room, confirm isolation, absence of voltage and disconnection by qualified personnel. Measure the enclosure against doors, elevators and corridor turns.
The nameplate weight and manufacturer's lifting instructions govern the plan, not an estimate based on the cabinet's outside dimensions.
Use designated lifting points and protect exposed coils, terminal boards and enclosure panels during handling. A spreader bar may be needed to keep sling pressure off the cabinet.
For a North Carolina pickup, identify the loading dock, truck approach and any rigging restriction before moving the unit off its mounting pad.
Local reality
Valuation factors
Assessment starts with verified kVA, K-rating, voltage arrangement, winding material and physical condition. A readable K-13 nameplate supported by load records tells more than a handwritten cabinet label.
Missing terminal covers, damaged coil supports or evidence of neutral overheating change how the unit is evaluated, even if its enclosure looks sound.
Service history matters because a K-rating alone cannot establish remaining condition. Compare the former load profile with ventilation conditions, temperature records and inspection findings.
For equipment removed from a Raleigh office renovation or hospital electrical upgrade, keep the removal reason separate from any documented winding fault or neutral termination damage.
Around the site
How to start the conversation
Send clear photographs of the K-factor nameplate, full enclosure, terminal compartment and any visible winding damage. Include the North Carolina location, kVA, primary and secondary voltages, K-rating and whether the unit is disconnected.
A photograph of the neutral terminal helps establish what can be checked before arranging an on-site inspection.
Provide the one-line drawing or panel schedule when it helps explain the former harmonic-rich load, along with test reports and temperature history. State who controls access and authorizes removal, particularly during demolition or bankruptcy proceedings.
Transformer Buyers NC buys these units; the initial review establishes equipment identity, condition and practical pickup 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 K-rating mean the transformer filters harmonics?
No. A K-rating identifies a transformer's capability to tolerate heating from harmonic currents within specified limits. It does not establish harmonic filtering performance. Keep any separate filter equipment identified on the one-line drawing distinct from the K-rated transformer.
Service area
Why inspect the neutral on a K-rated unit?
Triplen harmonic currents can add in the neutral of a three-phase, four-wire system. Check the neutral terminal rating, connected conductor sizing and signs of heat damage. An oversized terminal alone does not prove the installed neutral conductors were suitable.
Payment
Can you buy a failed K-factor transformer?
We buy failed K-factor transformers in North Carolina as well as used, surplus and obsolete units. Identify the failure, retain available test reports and photograph damaged windings or neutral connections. Keep the unit isolated pending qualified assessment and removal planning.
Logistics
Testing, oil and liability: what should a seller know?
These are dry-type transformers, so transformer-oil sampling is not part of the normal assessment. Check instead for winding contamination, insulation cracking, scorched leads and blocked ventilation openings.