JJ-GA283ATransformer
2020 Georgia Transformer GA283A 180/240/300 MVA 138/34.5 kV Transformer
- OEM
- Georgia Transformer
- MVA
- 180/240/300 MVA; 63/84/105 MVA tertiary
- High side
- 138 kV
- Low side
- 34.5 kV
- Tertiary
- 12 kV
- Qty
- 1 documented unit - GA283A
138 kV transformer sourcing
138 kV Transformers for Sale
J&J publishes 138/34.5 kV opportunities from Georgia Transformer and Kolektor ETRA plus an IEN Hanchang / JCL 138/13.8 kV design package. Ratings span 30/40/50 MVA-class through 180/240/300 MVA. Evidence differs by listing, and project teams must confirm the one-line, windings, impedance, condition, scope, location, and availability in writing.
J&J Transformers LLC · Sugar Land, Texas · Serving projects nationwide
Tommy Marco · tommy@jjtransformers.com
- Ratios represented
- 138/34.5 and 138/13.8 kV
- Published pages
- 4 opportunity pages
- Duties
- GSU + substation
- Evidence
- Nameplates, drawings, or FAT records by listing
Current power equipment inventory
138 kV results
138 kV transformer listings
JJ-GA424ATransformer
Georgia Transformer 72/96/120 MVA 138/34.5 kV Solar GSU
- OEM
- Georgia Transformer
- MVA
- 72/96/120 MVA; 25.2/33.6/42 MVA tertiary
- High side
- 138 kV
- Low side
- 34.5 kV
- Tertiary
- 12 kV
- Qty
- 1 documented unit - GA424A
JJ-138-110-5Transformer
Five 2020 Kolektor ETRA 66/88/110 MVA 138/34.5 kV GSU Transformers
- OEM
- Kolektor ETRA
- MVA
- 66/88/110 MVA; 22/29.333/36.666 MVA tertiary
- High side
- 138 kV
- Low side
- 34.5 kV
- Tertiary
- 13.8 kV
- Qty
- 5 units; matching unit packages available on request
JJ-JL3023Transformer
IEN Hanchang / JCL 30/40/50 MVA Class 138/13.8 kV Design Package
- OEM
- IEN Hanchang / JCL
- MVA
- 30/39.9/50 MVA at 55 C; 33.6/44.7/56 MVA at 65 C
- High side
- 138 kV
- Low side
- 13.8 kV
- Tertiary
- None stated
- Qty
- 1 design package represented - JL3023
Listings are represented opportunities, not guaranteed stock. Before relying on a unit, confirm its availability, seller authority, condition, exact location, included scope, and technical suitability in writing. All listings are subject to prior sale. J&J is not the OEM or engineer of record.
Jump to a section
What 138 kV transformer opportunities are published?
Current pages include a Georgia Transformer GA283A 180/240/300 MVA unit, a Georgia Transformer GA424A 72/96/120 MVA solar GSU, five represented Kolektor ETRA 66/88/110 MVA GSUs, and a JCL Energy-branded 30–56 MVA substation design package whose equipment OEM and serial identity require confirmation.
The evidence is not identical across these opportunities. GA283A has a serial-specific nameplate; GA424A has a nameplate and approval drawings; the Kolektor group has a rating plate and FAT package for one unit; request the matching packages for the remaining units; JL3023 is based on project approval drawings with final identity and test fields still open.
Why does GSU versus substation duty matter at 138 kV?
The ratio alone does not establish direction, winding configuration, tertiary purpose, fault duty, voltage regulation, grounding, taps, losses, or protection behavior. Generator and collector systems impose different interfaces from a facility or utility substation.
- Confirm generator or collector bus voltage, grounded-wye/delta relationships, tertiary loading, harmonics, and switching cases.
- State the MVA base used for impedance and compare the actual test value to the system-study requirement.
- Define whether an OLTC or DETC is required, its range and step size, the controlled winding, and the expected operating mode.
How should a surplus 138 kV transformer be qualified?
Start with serial identity, nameplate, outline, final test report, condition and storage history, oil and maintenance records, included scope, current location, dimensions and weights, seller authority, inspection access, and a written status confirmation.
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.
Common questions
Written quotes and supporting records control unit-specific ratings, availability, condition, price, and delivery.
Do you have 138 kV transformers?
Yes. Multiple public pages describe 138/34.5 kV opportunities, including documented and multi-unit represented equipment.
Is 138/13.8 kV also represented?
Yes. The JL3023 page describes a project-specific 138/13.8 kV substation design with several identity and test fields still requiring confirmation.
What is the largest published 138 kV MVA class?
The GA283A nameplate shows 180/240/300 MVA stages. Availability, condition, scope, and suitability still require confirmation.
Can J&J privately source another 138 kV transformer?
Yes. Submit exact MVA, ratio, duty, BIL, impedance, vector, taps, cooling, condition acceptance, location, documents, quantity, and needed-on-site date.
Are all 138/34.5 kV transformers interchangeable?
No. MVA, impedance, vector, tertiary, taps, BIL, cooling, losses, terminals, condition, and physical interfaces can differ materially.
Who approves a 138 kV transformer?
The project team and its responsible engineer must approve suitability, system studies, protection, installation, testing, and operation. J&J is not the engineer of record.