Use one comparison record for every offer. Identify the unit, record what is included, and leave missing information marked as unconfirmed rather than treating it as a match.
Normalize the technical comparison
Keep the manufacturer, serial or equipment ID, full MVA stages, winding voltages, connections, impedance, taps and accessories together. Ask the engineer to separate compliant features from exceptions and unknowns. Preserve all offered configurations when reviewing multi-voltage equipment.
Normalize the commercial comparison
Separate the equipment price from inspection, tests, repairs, oil, freight, taxes or duties, offloading and installation. Identify the seller, warranty provider, payment milestones and quote validity. Do not assume an unpriced service is included.
Compare schedule and acceptance
Use the same schedule endpoints for every offer. Identify release conditions, inspection or witness access, records required before acceptance and the procedure for resolving deficiencies. Retain the final scope and technical disposition with the purchase documents.
| Review item | What to record | Evidence to request |
|---|---|---|
| Unit identity | Manufacturer, equipment ID, condition and proposed quantity | Unit-specific nameplate and approved photographs |
| Capacity and voltage | Every MVA stage, cooling basis, winding voltage and frequency | Nameplate and applicable rating documents |
| Technical exceptions | Connections, impedance basis, taps and unresolved deviations | Drawings, available tests and written engineering disposition |
| Included equipment | Bushings, radiators, fans, controls, gauges, contacts, oil and spares | Itemized accessory and shipping lists |
| Condition and testing | Service or storage history, repairs, test dates and tests still required | Available reports tied to the proposed unit |
| Price and exclusions | Equipment, preparation, testing, transport, taxes, offloading and installation | Itemized quotation and express exclusions |
| Warranty | Provider, start date, duration, coverage and exclusions | Written terms for that unit |
| Schedule | Release, pickup, arrival and commissioning as separate milestones | Confirmed responsibilities and release conditions |
| Payment and acceptance | Milestones, inspection access, required records and acceptance conditions | Agreed commercial documents |
Is the lowest quoted equipment price the lowest project cost?
Not necessarily. Missing accessories, site adaptation, testing and delivery services can materially change the comparison. Price the agreed scope consistently.
Move from review to equipment selection
Send your specification or equipment ID, project location and required date. We’ll identify the information available for the proposed unit and the items that still need confirmation.
Start with the transformer inventory, or narrow the review to GSU transformers and substation transformers. Keep unresolved points with the comparison until the responsible party confirms them.
This guide supports procurement. Final design, suitability, testing and acceptance remain with the project’s qualified professionals and agreed documents.