What we buy
Ranges we buy on this page
Transformer Buyers NC buys used, surplus, failed and obsolete buck-boost transformers anywhere in North Carolina. This page covers identification, connection checks, condition records and removal for plant engineers, facility directors and crews clearing electrical equipment from machine shops, printing plants and older mills.
These small units often sit beside a machine disconnect rather than in a transformer yard. Their nameplates, lead connections and enclosure condition help establish what is being removed and how it should be handled.
| Phase | kVA | Voltage | Fluid |
|---|---|---|---|
| 1 or 3-phase | 0.05 - 10 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
What a Buck-Boost Transformers is
A buck-boost transformer is a small isolation-style unit wired to raise or lower voltage by a fixed percentage. Its primary and secondary windings are separate as manufactured.
In a common buck-boost connection, those windings are interconnected as an autotransformer, so the installed circuit does not provide electrical isolation between input and output.
The connection diagram matters more than the box size. A unit with 120/240-volt primary windings and 12/24-volt secondary windings can support several connection arrangements.
The winding kVA on its nameplate is not necessarily the connected load kVA; that load rating depends on the voltage correction and the manufacturer's wiring table.
Local reality
Where Buck-Boost Transformers turn up in North Carolina
North Carolina machine shops use buck-boost units beside lathes, grinders and other equipment whose voltage requirements differ from the building service. A 208-volt machine on a 240-volt service may need a buck connection.
The reverse mismatch may need boost, provided the selected unit and connection produce an acceptable operating voltage.
Printing plants and older mills may have several small enclosures attached to walls, machine frames or posts near disconnects. Equipment relocation can leave these units behind with clipped leads and missing diagrams.
Record the machine voltage, service voltage and original connection before demolition separates a buck-boost unit from its installation.
Around the site
What we check before we quote
We inspect taps, wiring configuration, winding temperature information and the enclosure. Clear photographs should show the nameplate, connection diagram, terminal compartment and all enclosure faces.
Identify whether the unit operated alone or in a multi-unit bank, since an isolated box may not explain the original three-phase circuit or its correction.
Heat-darkened insulation, brittle leads and scorched terminals can indicate an overloaded winding or a loose connection. Useful records include measured winding temperatures, loading history and any thermal trips.
An infrared reading from the enclosure is not a winding temperature measurement, and a cold unit cannot establish its previous operating temperature.
Where it sits
Oil, PCBs and testing
Most small buck-boost transformers are dry-type units, with no oil tank, radiator or drain valve. Do not assume that every old enclosure contains dielectric fluid.
Check the nameplate and construction first; an unusual liquid-filled unit needs separate fluid identification and handling rather than being treated as an ordinary dry-type box.
For dry-type units, inspection focuses on winding insulation, moisture, dirt and damaged leads rather than oil sampling. Qualified personnel may use insulation-resistance and winding-resistance tests under an appropriate procedure.
If fluid is present, retain existing PCB records and arrange any necessary sampling before opening, draining or transporting the unit off-site.
On the ground
Rigging, weight and transport
A small buck-boost is often light enough to carry, but its nameplate weight and mounting position still govern removal. Some units are heavier than their compact enclosure suggests.
Disconnect power, verify absence of voltage and release the leads before loosening wall brackets; never let conduit support the transformer during removal.
Most small buck-boost units are scrapped rather than resold. Loose units should travel secured against movement, with leads protected and sharp mounting feet kept away from adjacent equipment.
For a group removed from a printing line, label each box and retain its connection diagram before placing the units on a pallet.
Local reality
What moves the number
The assessment depends on the number of units, winding material where documented, nameplate ratings and physical condition. A complete buck-boost with readable terminal markings is easier to identify than a stripped core with severed leads.
Include photographs of any missing covers, cracked insulation or burned connection points with the equipment record.
Removal conditions also shape the scope: a pallet of disconnected buck-boost units differs from boxes still mounted above operating machines. State whether electrical isolation is complete, whether access requires a lift and whether the units form matched banks.
These details establish handling requirements without treating every small enclosure as identical.
Around the site
When to call us about a buck-boost
Contact is useful when a machine replacement, plant closure or service change leaves buck-boost units disconnected or scheduled for removal. A shop moving from 208-volt distribution to equipment suited to its existing service may no longer need the correction boxes.
Identify which units are retired before disturbing circuits that remain active.
For an initial review, gather the North Carolina site location, unit count, nameplate photographs and a description of the original voltage correction. Note failed windings, water exposure or missing terminal covers.
Transformer Buyers NC buys these units; electrical disconnection and safe access must be established before anyone releases a mounted enclosure.
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 buck-boost connection provide electrical isolation?
Not in the common autotransformer connection. Although the unit has separate primary and secondary windings as manufactured, the buck-boost wiring interconnects them. Check the actual terminal diagram before describing a removed 208/240-volt correction unit as an isolation transformer.
Service area
What photographs identify a removed buck-boost transformer?
Photograph the nameplate, wiring diagram, terminal markings and enclosure damage. Include the complete group if several units served one three-phase machine. A photograph taken before disconnection can preserve lead positions that are otherwise lost when a demolition crew clips the conductors.
Payment
Do small buck-boost transformers need oil testing?
Ordinary dry-type buck-boost units contain no dielectric oil to sample. Verify construction rather than relying on enclosure age or appearance. If the unit actually contains fluid, keep its identification and PCB documentation with it and determine testing requirements before removal.
Logistics
Oil, PCBs and testing: what should a seller know?
Most small buck-boost transformers are dry-type units, with no oil tank, radiator or drain valve. Do not assume that every old enclosure contains dielectric fluid.