Unused and never-energized transformer supply
J&J buys and sells surplus power transformers, unused project equipment, canceled-project units and selected rebuilt transformers. Compare each listing's stated condition with its nameplate, drawing, test and storage records. Surplus describes why a unit is offered; it does not establish that it is new or service-ready. Send the J&J reference and your project specification for price, technical records and current availability.
J&J Transformers LLC · Sugar Land, Texas · Serving projects nationwide
Tommy Marco · tommy@jjtransformers.com
Current transformer listings
Start with the public ratings below. Call or email Tommy for current availability, pricing, photos and the technical package. Each unit needs project-specific engineering review and remains subject to prior sale.
For a multi-unit order, specify each electrical configuration, accepted condition and delivery phase. Start with the current equipment records, then request the identity, documents, allocation and quote scope for each proposed unit.
Surplus power transformers may be unused equipment from a canceled project or previously operated units. Compare surplus GSU and substation transformer offers by the individual nameplate, cooling-stage rating and condition; ownership history alone does not establish whether a unit has been energized.
Compare power transformers for sale for 69 kV, 115 kV, 138 kV, 230 kV, 345 kV and 500 kV system projects. Review each equipment record's exact winding voltages, MVA, condition and current allocation before requesting a quote.
Current records separate J&J-confirmed availability, dated written offers, newly submitted inventory schedules and 2027 production positions. Stored surplus is not automatically used equipment, and future production is not ready-to-ship stock. Request current allocation, photos, matching records, inspection and complete loading, shipping and warranty terms through J&J.
Surplus describes why equipment is no longer needed; it does not define its operating history. A surplus unit can be unused, previously energized or rebuilt. Buyers looking for second-hand or pre-owned transformers should request that history explicitly, while a new/unused requirement needs a matching condition statement and preservation records.
An unused surplus transformer may never have been energized. A second-hand transformer has prior service, while a rebuilt unit has a defined repair or rebuild history. Confirm each unit's actual operating, storage, preservation, testing and transport records; the advertised model or manufacture year alone does not establish condition.
An unused-surplus or previously operated transformer may be a supply option when its documented configuration and condition fit the project. J&J distinguishes represented information from records reviewed for the actual equipment.
A matching voltage ratio is the starting point. Compare the existing transformer and proposed replacement on the same rating basis before reserving equipment. Send the nameplate or one-line by email when available; an initial conversation can begin with MVA, voltages and your required date.
| Compare | What the project team needs to confirm |
|---|---|
| Capacity and cooling | Required MVA at each cooling stage, ambient conditions and operating duty—not only the highest rating. |
| Winding connections | High, low and tertiary voltages; vector group, phase displacement, neutral and grounding requirements. |
| System performance | Impedance with its MVA base, tap range and controls, insulation levels, protection and fault-duty requirements. |
| Installation and schedule | Terminal arrangement, dimensions, accessories, inspection, loading, transport and the needed-on-site date. |
Start with the failed-unit nameplate or target specification and state which differences the project engineer may consider. At minimum, provide MVA or kVA, every winding voltage, intended duty, phase, frequency, site, destination, acceptable condition, and required date.
J&J seeks evidence for exact identity, seller ownership or representation authority, present condition, technical fit, included scope, location, inspection and test rights, logistics, warranty provider, price basis, payment terms, and current availability. Missing items stay visible as open items rather than being converted into claims.
| Gate | Preferred evidence | If unresolved |
|---|---|---|
| Identity | Legible serial-specific nameplate reconciled to drawings and reports | Candidate remains preliminary |
| Authority | Owner or documented representation path for the exact unit | No controlled-availability claim |
| Technical fit | Requirement-versus-candidate schedule using final ratings and test values | Deviation requires purchaser/engineer disposition |
| Condition | Current inspection, history, preservation, fluid/electrical tests as applicable | Condition and work scope remain open |
| Commercial/logistics | Written scope, location, shipping state, price, terms, warranty and milestones | No delivered-price or schedule commitment |
When a responsible source and plausible technical match exist, J&J can return a focused candidate summary with the known ratings, evidence reviewed, open deviations, location and logistics status, commercial scope, and next diligence step. If the evidence is not ready, the result remains a supply lead rather than a quote-ready unit.
Public listings are represented opportunities, not reserved or guaranteed stock. Seller authority, serial identity, present condition, exact location, availability, price, included scope, and delivery require current written confirmation and remain subject to prior sale.
Estimate the load, review the candidate's condition records, and compare the complete quotation on the same basis. These resources help your project team identify missing information before accepting a transformer offer.
Compare the offered transformer with the operating unit and the project specification. Keep the winding duty, cooling-stage ratings, technical deviations, inspection scope and delivery responsibilities beside the quoted price.
For a new, unused, used, rebuilt or surplus step-down requirement, retain the offered unit's actual condition and evidence basis. Confirm the permitted operating direction, continuous capacity, winding connections, grounding, taps, test records and included equipment before accepting a match.
Describe the transformer you want to buy by actual source/output voltage, required MVA, power-flow duty, quantity, condition acceptance and delivery date. Step-down, substation, GSU, pad-mounted, dry-type and autotransformer inquiries remain separate technical matches within J&J's broader transformer supply coverage.
Written quotes and supporting records control unit-specific ratings, availability, condition, price, and delivery.
Surplus power transformers may be unused equipment from a canceled project or previously operated units. Compare surplus GSU and substation transformer offers by the individual nameplate, cooling-stage rating and condition; ownership history alone does not establish whether a unit has been energized. Email tommy@jjtransformers.com or call Tommy Marco at 346-276-9540 for the exact equipment record, price and written availability.
No. An existing unused unit has its own manufacturing date, storage history, configuration and warranty terms. Review those records and the scope offered for the specific unit before comparing it with a new factory order.
Email the listing reference and your requirement. J&J will confirm which records are available and discuss inspection arrangements and any commercial conditions directly. Public listings do not establish a completed inspection or transferable warranty.
Call Tommy Marco at 346-276-9540 or email tommy@jjtransformers.com. Specifications, reports, photos and pricing are shared directly after contact, according to the records available for the proposed unit. Availability remains subject to prior sale and written confirmation.
No. The public inventory is selective. Project teams can submit an exact requirement for screening against public records and current non-public owner-authorized sources.
No blanket ownership claim is made. The written candidate summary or quote should state the ownership or representation basis for the exact unit.
Not always. Surplus may refer to unused project equipment, while other opportunities may be used or reconditioned. The exact condition and evidence must be stated.
Potentially, but only after identity, fit, condition, testing, missing scope, transport, site work, commercial terms, and current availability are confirmed.
Possibly. Review the represented condition and evidence on the specific listing, then confirm serial identity, present condition, warranty provider, technical fit, scope, location, price, logistics, and written availability before relying on it.
Send the target or failed-unit nameplate, one-line, MVA, voltages, BIL, impedance, vector, taps, site, destination, condition preference, and needed-on-site date.
J&J can review equipment submitted by email to tommy@jjtransformers.com when the direct owner, owner-employed asset team, or transfer-authorized EPC provides identity, ratings, condition, location, records, authority, and commercial expectations.
Yes. Send quantity per configuration, winding voltages, continuous MVA, accepted condition and required delivery phase to Tommy. The quotation identifies the actual unit, documents, allocation and included scope for every position. Identical-unit and parallel-operation requirements need explicit review.
