What we buy
Ranges we buy on this page
Scott-T transformers convert three-phase power to two-phase power, or the reverse, through a specific winding connection. This page covers how Transformer Buyers NC evaluates these uncommon assemblies in North Carolina, from the connection diagram to removal from a mill transformer pad.
| Phase | kVA | Voltage | Fluid |
|---|---|---|---|
| 2 to 3-phase | 100 - 5,000 kVA | 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
Scott-T Transformers explained
A Scott-T connection uses a main transformer and a teaser transformer to produce two secondary voltages displaced by 90 electrical degrees. The teaser connects to the midpoint of the main primary.
Its primary winding has approximately 86.6 percent of the main winding's turns for the same volts per turn.
The connection diagram matters more than the shape of the tank or enclosure. Two transformers standing beside each other are not necessarily a Scott-T assembly.
Terminal markings, the main winding midpoint and the teaser connection establish what the equipment actually does and whether the complete connected assembly is still present.
Local reality
The North Carolina install base
In North Carolina, Scott-T equipment appears in legacy industrial plants, older mills and a few university labs. A mill electrical room may retain the assembly long after its original two-phase motor has disappeared.
The surviving feeder schedule and motor nameplate can explain a connection that newer plant drawings leave unidentified.
University lab equipment needs a different reading of the records than a mill installation. A Scott-T assembly may have served a particular experiment rather than a permanent production load.
Facilities staff should preserve laboratory wiring diagrams, secondary voltage settings and any notes identifying which terminals supplied the two separate phases.
Around the site
The inspection that decides value
Inspection starts with the connection diagram, winding condition, oil test where applicable and the load the Scott-T assembly served. Nameplate photographs alone can miss the relationship between the main and teaser units.
Records should identify both transformers, their terminal designations and any field changes made after the original installation date.
Winding resistance and insulation test records help distinguish a retired working assembly from one removed after a fault. A damaged teaser winding, burned midpoint connection or missing interconnecting lead changes the assessment.
Testing must follow an appropriate procedure, with the assembly isolated and its connection understood before instruments are attached.
Where it sits
Fluid condition and PCB status
Not every Scott-T transformer contains oil; some assemblies are dry-type. For liquid-filled equipment, identify the fluid in each tank rather than assuming the main and teaser units match.
An oil test report should trace back to the sampled unit through its serial number, sample date and documented sampling location.
PCB status requires records or appropriate testing, not an estimate based on an old mill's construction date. Previous fluid changes can complicate the history of either Scott-T tank.
Keep laboratory reports with the equipment records, and flag leaking gaskets, damaged drain valves or staining beneath either tank before removal planning.
On the ground
Getting it off the pad
Removal planning begins by documenting how the main and teaser transformers connect before anyone separates them. Photograph terminal markings and label interconnecting conductors at both ends.
Qualified electrical personnel must isolate the assembly, verify absence of voltage and address grounding under the site's procedures before riggers approach the transformer pad.
An older mill doorway may dictate the lift more than the outdoor pad does. Confirm each unit's weight, lifting points and exit dimensions before choosing a crane, forklift or lowboy.
Protect bushings and exposed terminals, and keep the Scott-T connection records with both units if they travel as separate pieces.
Local reality
What a buyer weighs up
Scott-T units are rare, and a reuse assessment depends entirely on finding the particular plant that still needs two-phase power. A sound tank and clean bushings do not establish a suitable destination.
Primary voltage, secondary voltage, frequency and the original load must match an actual two-phase application, not a general transformer requirement.
Completeness carries particular importance because a main transformer without its matching teaser may no longer form the intended Scott-T connection. The assessment considers both nameplates, winding test results, terminal condition and connection drawings.
Failed assemblies need their fault history preserved so damaged windings are not mistaken for serviceable equipment during review.
Around the site
The next step for a scott-t
Transformer Buyers NC buys used, surplus, failed and obsolete Scott-T transformers anywhere in North Carolina. An initial review needs photographs of both units, readable nameplates, the connection diagram and a description of the two-phase load.
Include whether the assembly remains connected, has been disconnected or is already staged for removal.
For a mill closure or university lab cleanout, assign one equipment identifier to the complete Scott-T assembly and retain each individual serial number beneath it. Note access restrictions, known leaks and missing leads in the same record.
That package lets the technical review and removal planning address the same equipment.
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
How can I identify a Scott-T transformer assembly?
Look for a connection diagram showing a main transformer with a midpoint primary connection and a teaser transformer connected to that midpoint. Photograph both nameplates and terminal markings. Two adjacent tanks alone do not prove that the equipment forms a Scott-T connection.
Service area
Can you assess a failed Scott-T assembly?
Yes. Transformer Buyers NC buys failed Scott-T equipment as well as retired working assemblies. Preserve the fault report, winding test results and photographs of damaged terminals. Identify whether the failure affected the main transformer, the teaser transformer or their interconnecting conductors.
Payment
Should the main and teaser units stay together?
Keep them identified as one assembly even if removal requires separate handling. Retain both serial numbers, label the interconnecting leads and save the connection diagram. Separating the records can make it difficult to establish the original winding relationship and intended two-phase output.
Logistics
Getting it off the pad: what should a seller know?
Removal planning begins by documenting how the main and teaser transformers connect before anyone separates them. Photograph terminal markings and label interconnecting conductors at both ends.