Prove the exact transformer identity and seller authority
Obtain a legible serial-specific nameplate, OEM and model, year, current location, ownership chain or representation authority, and a written statement identifying exactly what is offered.
- Reconcile every serial, drawing title block, test report, photo, storage tag, and commercial schedule.
- Distinguish an owned unit, an authorized listing, a non-exclusive representation, and a sourcing lead.
- Confirm quantity by serial number; do not apply one unit’s test package to a multi-unit group without evidence.
Compare technical fit against the project—not another listing
Build a controlled comparison covering MVA stages, voltages and maximum system voltage, BIL, frequency, phase, vector, grounding, tertiary duty, impedance and base, taps, cooling, fluid, losses, sound, terminals, controls, accessories, dimensions, weights, standards, and site conditions.
Have the responsible engineer resolve each deviation against load flow, short circuit, protection, grounding, harmonics, insulation coordination, mechanical, civil, acoustic, environmental, and operating requirements. A marketplace summary is useful for discovery but is not an approval document.
Establish present condition and the limits of historical tests
Request storage and operating history, maintenance, oil records, leak and corrosion observations, bushing and accessory condition, alarm history, previous repairs, transport events, preservation records, photographs, and available factory and field tests.
A historical FAT supports factory performance at that date; it does not establish present condition after shipment, storage, operation, relocation, or repair. Define inspection access, new test scope, acceptance criteria, witness rights, nonconformance handling, and who pays for corrective work or retest.
Close logistics, scope, schedule, and commercial gaps in writing
Confirm transport dimensions and weights, disassembly, oil and gas state, included bushings/coolers/controls/spares, removal and loading, route survey, permits, offload, foundation, assembly, field service, tests, taxes, warranty source, payment milestones, risk of loss, price validity, and prior-sale terms.
Public listings are opportunities for technical screening, not guaranteed stock. Seller authority, serial identity, current condition, location, availability, price, included scope, and delivery require current written confirmation.
Frequently asked questions
These answers explain the procurement and application questions buyers ask most often. Unit-specific ratings, availability, conformity, condition, price, and delivery are controlled by the written quotation and supporting documents.
Does a factory test report prove current condition?
No. It proves test results at the recorded factory date and setup; current condition needs current evidence and an agreed inspection/test plan.
What is the first document to request?
Start with a legible serial-specific nameplate and reconcile it to drawings, reports, photos, and the commercial offer.
Should a sold or withdrawn listing disappear?
A permanent page may remain with a clear sold or withdrawn status, but it must not imply current availability.