Choose a listing and request its current offer
The comparison above shows the actual equipment records for this winding class. Keep existing equipment, submitted offers and future production separate. A listing's quantity is distinct from the quantity reserved for your order.
- Prolec GE · 132/176/220 MVA; 46.2/61.6/77 MVA tertiary · 345/34.5 kV with 13.8 kV delta tertiary
- Georgia Transformer · 108/144/180 MVA; 37.8/50.4/63 MVA tertiary · 345/34.5 kV with 12 kV buried-delta tertiary
- Siemens · 260 MVA · 345/34.5 kV
- TSEA energia · 136/181/226 MVA · 345/34.5 kV with 13.8 kV no-load delta tertiary
- TSEA energia · 160/213/266 MVA · 345/34.5 kV with 13.8 kV no-load delta tertiary
Choose the exact winding ratio or project quantity
Use the required main-winding voltage pair to choose equipment. For a multi-unit project, give each ratio and delivery phase its own quantity.
Request a 345/34.5 kV transformer quote
Compare the actual 345/34.5 kV transformer records by required continuous MVA, winding arrangement, condition and test evidence. Specify generator/collector or proposed step-down duty and the required arrival date; confirm current allocation and the included delivery scope directly with J&J.
Build the delivery and document review around the proposed unit
A 345/34.5 kV voltage match is the beginning of procurement. Give J&J the controlling project specification and the owner's required document list so gaps can be identified before a commercial commitment.
- Identify the required continuous and cooling-stage MVA ratings and the specified tertiary duty.
- List the required drawings, nameplates, test reports, inspection access, and acceptance hold points.
- Separate equipment availability from transport readiness, site receiving readiness, and energization.
- Confirm included accessories, assembly responsibilities, freight terms, and any origin restrictions in the written proposal.
Is the Prolec GE 220 MVA 345/34.5 kV transformer available?
Yes. The Prolec GE 132/176/220 MVA, 345/34.5 kV transformer is available, brand new and never used. It has never been energized and includes a 13.8 kV delta tertiary. Contact Tommy Marco at 346-276-9540 or tommy@jjtransformers.com for specifications and pricing. Subject to prior sale; final allocation and delivery terms are confirmed in writing.
Transformer sales completed by J&J
Review original photos and confirmed equipment details from J&J's completed transformer sales. These historical units have sold; current requirements are reviewed against the equipment offered today.
345/34.5 kV step-down transformer requirements
For a 345/34.5 kV step-down request, provide both source and output winding voltages, required continuous MVA, quantity and project date. Compare the candidate's actual operating-direction limits, winding connections, grounding, taps, impedance, insulation and installation interfaces. The voltage page remains a screening route; the step-down hub explains duty and quotation evidence.
Evidence path for a 345/34.5 kV transformer purchase
Use three separate records: the public screening facts, the private technical package and the written commercial offer. This keeps a useful buying page from being mistaken for a technical approval, guaranteed allocation or delivery commitment.
J&J shares sensitive serial-specific and seller documents directly after the equipment and project requirement are qualified. Public pages do not disclose private owner, customer, supplier or storage information.
- Review supplier and equipment qualification evidence
- Review confirmed completed transformer requirements
- Compare technical and commercial transformer offers
| Evidence stage | What to confirm |
|---|---|
| Public screening record | Published records distinguish already-built transformer opportunities from 2027 production allocations and retain the actual cooling-stage MVA, winding arrangement, condition and quantity basis for each offer. |
| Private technical package | Request the offered unit or production group's available drawings, nameplate or design record, photographs, test scope, warranty basis and unresolved specification deviations after sharing the project requirement. |
| Written commercial offer | The written proposal confirms the selected equipment, factory or seller authority, modification assumptions, allocation, price, delivery prerequisites and site-arrival schedule. |
For worksheets, specifications or supporting documents, call 346-276-9540 or email tommy@jjtransformers.com. Files are shared directly after contact.
Common questions
Written quotes and supporting records control unit-specific ratings, availability, condition, price, and delivery.
How do I request a transformer price and availability?
Email tommy@jjtransformers.com or call Tommy Marco at 346-276-9540. Send the listing reference or required MVA, exact winding voltages, quantity, destination and needed-on-site date. Ask for specifications, price, current allocation and delivery terms. Written confirmation is required; subject to prior sale.
Are every listing and production allocation ready to ship?
No. Existing equipment, submitted inventory and factory production allocations have different release schedules. TSEA allocations are for 2027 and are not immediately shipping stock. Ask for current written allocation, preparation requirements, included accessories and the delivery milestone for each offered unit.
Can the listed GSU be used as a step-down substation transformer?
The proposed operating direction and permitted continuous MVA must be checked against the actual unit documents. Winding connections, grounding, taps, protection and site interfaces need project engineering review; a matching voltage ratio alone does not establish acceptance.
Does a transformer offer include a complete substation?
Only equipment expressly included in the quotation is supplied. Specify the transformer, breakers, switchgear, protection, controls and site-work responsibilities separately when requesting a complete package.