Company base: Sugar Land, Texas · Nationwide sales · Tommy Marco

346-276-9540 tommy@jjtransformers.com

Current equipment listings

Current transformer and generator inventory

Search by OEM, rating or voltage, filter by secondary voltage, and compare up to three current listings. Send your shortlist or your project requirements. Availability must be confirmed in writing and remains subject to prior sale.

All current units listed by J&J Transformers LLC are available. All are brand new, never used and never energized, except the three rebuilt ABB 230/13.8 kV transformers in lot JJ-ABB-230-13-3. J&J confirmed condition and availability on September 24, 2026. Subject to prior sale and written reconfirmation; final allocation and delivery terms are confirmed in writing.

Equipment location: USA for every currently listed unit except the Kolektor ETRA units, which are in Slovenia. Sugar Land, Texas is J&J's company base, not the equipment location.

Current power equipment inventory

17 listings match. Select up to 3 to compare.

Current listings

Transformer listings

66 kV transformers

JJ-WEG-66-90Transformer

WEG 54/79/90 MVA 66/34.5 kV Transformer

Equipment outline drawing — WEG 90 MVA 66/34.5 kV transformer
Equipment outline drawingOpen full size ↗
Nameplate drawing — WEG 90 MVA 66/34.5 kV transformer
Nameplate drawingOpen full size ↗
OEM
WEG
MVA
54/79/90 MVA
High side
66 kV
Low side
34.5 kV
Tertiary
None stated
Vector group
Dyn1
Qty
1 unit
Condition
Brand new, never used and never energized
Equipment location
USA

115 kV transformers

Open 115 kV page
JJ-HB533-2Transformer

Virginia Transformer 50.4/67.2/84 MVA 115/34.5 kV Transformers

Nameplate drawing for the two 84 MVA Virginia transformers.
Nameplate drawingOpen full size ↗
OEM
Virginia Transformer Corp.
MVA
50.4/67.2/84 MVA
High side
115 kV
Low side
34.5 kV
Tertiary
None stated
Vector group
Dyn1
Qty
2 documented unit IDs - HB533A and HB533B
Condition
Brand new, never used and never energized; nameplate design reviewed; manufacture date requires confirmation
Equipment location
USA
JJ-HB501-3Transformer

Virginia Transformer 36/48/60 MVA 115/34.5 kV Transformers

Nameplate drawing for one of the three 60 MVA Virginia transformers.
Nameplate drawing — one unit from the lotOpen full size ↗
OEM
Virginia Transformer Corp.
MVA
36/48/60 MVA
High side
115 kV
Low side
34.5 kV
Tertiary
None stated
Vector group
Dyn1
Qty
3 documented units - HB501A, HB501B, and HB501C
Condition
Brand new, never used and never energized; February-March 2026 nameplates reviewed
Equipment location
USA

120 kV transformers

138 kV transformers

Open 138 kV page
JJ-GA283ATransformer

2020 Georgia Transformer GA283A 180/240/300 MVA 138/34.5 kV Transformer

Manufacturer outline drawing for the 300 MVA Georgia transformer.
Equipment outline drawingOpen full size ↗
Nameplate drawing for the 300 MVA Georgia transformer.
Nameplate drawingOpen full size ↗
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
Vector group
YNyn0+d1
Qty
1 documented unit - GA283A
Condition
Brand new, never used and never energized; 2020 nameplate reviewed
Equipment location
USA
JJ-GA424ATransformer

Georgia Transformer 72/96/120 MVA 138/34.5 kV Solar GSU

Equipment photo of the 120 MVA Georgia transformer.
Equipment photoOpen full size ↗
Actual nameplate of the 120 MVA Georgia transformer.
Nameplate photoOpen full size ↗
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
Vector group
YNyn0+d1
Qty
1 documented unit - GA424A
Condition
Brand new, never used and never energized; approval drawings reviewed
Equipment location
USA
JJ-138-110-5Transformer

Five 2020–2021 Kolektor ETRA 66/88/110 MVA 138/34.5 kV GSU Transformers

Equipment detail from one transformer in the five-unit Kolektor ETRA lot; the nameplate photo shows another unit in this lot.
Equipment detail from the five-unit lotOpen full size ↗
Actual nameplate from another transformer in the five-unit Kolektor ETRA lot.
Nameplate from another unit in this lotOpen full size ↗
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
Vector group
YNyn0+d11
Qty
5 units; matching unit packages available on request
Condition
Brand new, never used and never energized; 2020 factory records reviewed for one unit
Equipment location
Slovenia
JJ-JL3023Transformer

IEN Hanchang / JCL 30/40/50 MVA Class 138/13.8 kV Design Package

Equipment outline drawing — IEN Hanchang 50 MVA-class 138/13.8 kV transformer
Equipment outline drawingOpen full size ↗
Nameplate drawing — IEN Hanchang 50 MVA-class 138/13.8 kV transformer
Nameplate drawingOpen full size ↗
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
Vector group
Delta–Grounded Wye; clock to confirm
Qty
1 design package represented - JL3023
Condition
Brand new, never used and never energized; 2024 approval drawings reviewed; serial identity requires confirmation
Equipment location
USA

161 kV transformers

Open 161 kV page
JJ-SIEMENS-161-105Transformer

2022 Siemens Energy 63/84/105 MVA 161/34.5 kV Transformer

Equipment photo — Siemens Energy 105 MVA 161/34.5 kV transformer
Equipment photoOpen full size ↗
Nameplate photo — Siemens Energy 105 MVA 161/34.5 kV transformer
Nameplate photoOpen full size ↗
OEM
Siemens Energy
MVA
63/84/105 MVA
High side
161 kV
Low side
34.5 kV
Tertiary
13.8 kV
Vector group
Not stated in supplied records
Qty
1 nameplate-documented unit
Condition
Brand new, never used and never energized; December 2022 nameplate reviewed
Equipment location
USA

230 kV transformers

Open 230 kV page
JJ-230-220-1Transformer

New ABB / Hitachi 220 MVA 230/34.5 kV Transformer

ABB 220 MVA 230/34.5 kV transformer during factory testing
Factory test photo (2021)Open full size ↗
ABB 132/176/220 MVA 230/34.5 kV nameplate drawing with winding connections
Nameplate and winding drawingOpen full size ↗
OEM
ABB / Hitachi
MVA
132/176/220 MVA
High side
230 kV
Low side
34.5 kV
Tertiary
13.8 kV
Vector group
YNyn0d1 — Wye–Wye / Delta
Qty
1 unit
Condition
Brand new, never used and never energized
Equipment location
USA
JJ-ABB-230-13-3Transformer

Three Pre-Owned, Rebuilt ABB 40/53.3/44.8/59.7 MVA 230/13.8 kV Transformers

Equipment photo — ABB 59.7 MVA-class 230/13.8 kV transformer from the three-unit lot
Equipment photoOpen full size ↗
Nameplate photo — ABB 59.7 MVA-class 230/13.8 kV transformer from the three-unit lot
Nameplate photoOpen full size ↗
OEM
ABB
MVA
40/53.3 MVA at 55 C; 44.8/59.7 MVA at 65 C
High side
230 kV
Low side
13.8 kV
Tertiary
None stated
Vector group
Delta–Grounded Wye; clock to confirm
Qty
3 represented units
Condition
Rebuilt; three ABB 230/13.8 kV transformers. Rebuild scope and included accessories are confirmed with the quotation
Equipment location
USA
JJ-ABB-AUTO-112Transformer

ABB 60/80/100 MVA 230 to 115/69 kV Autotransformer with 13.5 kV Tertiary

Equipment photo from supplied package — ABB 112 MVA-class 230 to 115/69 kV autotransformer
Equipment photo from supplied packageOpen full size ↗
Nameplate photo — ABB 112 MVA-class 230 to 115/69 kV autotransformer
Nameplate photoOpen full size ↗
OEM
ABB Ltda.
MVA
60/80/100 MVA at 55 C; 67.2/89.6/112 MVA at 65 C
High side
230 kV
Low side
115 / 69 kV
Tertiary
13.5 kV
Vector group
Wye autotransformer / Delta tertiary; clock to confirm
Qty
1 nameplate-documented opportunity; available quantity to confirm
Condition
Brand new, never used and never energized
Equipment location
USA
JJ-WEG-230-88Transformer

2020 WEG 53/70.5/88 MVA 230/34.5 kV Power Transformer

Nameplate drawing — WEG 88 MVA 230/34.5 kV transformer
Nameplate drawingOpen full size ↗
OEM
WEG
MVA
53/70.5/88 MVA; 18.55/24.675/30.8 MVA tertiary
High side
230 kV
Low side
34.5 kV
Tertiary
13.8 kV
Vector group
YNyn0d1
Qty
1 nameplate-documented unit
Condition
Brand new, never used and never energized; June 2020 nameplate reviewed
Equipment location
USA

345 kV transformers

Open 345 kV page
JJ-G5058-03-01Transformer

Prolec GE 132/176/220 MVA 345/34.5 kV Collector Step-Up Transformer

Manufacturer outline drawing for the 220 MVA Prolec GE transformer.
Equipment outline drawingOpen full size ↗
Nameplate drawing for the 220 MVA Prolec GE transformer.
Nameplate drawingOpen full size ↗
OEM
Prolec GE
MVA
132/176/220 MVA; 46.2/61.6/77 MVA tertiary
High side
345 kV
Low side
34.5 kV
Tertiary
13.8 kV
Vector group
Grounded Wye–Wye / Delta; clock to confirm
Qty
1 documented unit - G5058-03-01
Condition
Brand new, never used and never energized; approval drawings reviewed
Equipment location
USA
JJ-GA447ATransformer

Georgia Transformer 108/144/180 MVA 345/34.5 kV Transformer

Equipment photo of the 180 MVA Georgia transformer.
Equipment photoOpen full size ↗
Actual nameplate of the 180 MVA Georgia transformer.
Nameplate photoOpen full size ↗
OEM
Georgia Transformer
MVA
108/144/180 MVA; 37.8/50.4/63 MVA tertiary
High side
345 kV
Low side
34.5 kV
Tertiary
12 kV
Vector group
YNyn0+d1
Qty
1 documented unit - GA447A
Condition
Brand new, never used and never energized; factory acceptance tested September 2024
Equipment location
USA

Other documented voltage ratios

JJ-PGE-240-71Transformer

Prolec GE 42.7/57/71.2 MVA 240/120 to 13.8 kV GSU

Equipment outline drawing — Prolec GE 71.2 MVA 240/120 to 13.8 kV transformer
Equipment outline drawingOpen full size ↗
Nameplate drawing — Prolec GE 71.2 MVA 240/120 to 13.8 kV transformer
Nameplate drawingOpen full size ↗
OEM
Prolec GE
MVA
42.7/57/71.2 MVA at 60 Hz
High side
240 / 120 kV
Low side
13.8 kV
Tertiary
None stated
Vector group
Grounded Wye–Delta; clock to confirm
Qty
1 documented unit
Condition
Brand new, never used and never energized
Equipment location
USA

All currently listed units are available, confirmed by J&J on September 24, 2026. Call or email for pricing and the technical package. Subject to prior sale; final allocation and delivery terms are confirmed in writing. Technical-record review dates refer to the documents reviewed.

Equipment supply

Your requirement doesn’t have to match a listing.

J&J also supplies step-down and substation transformers, large GSUs, generators, turbines and circuit breakers. Send your ratings, voltages, quantity, project site and required date so Tommy can check suitable options. Step-down and substation supply · Circuit breakers

Email for Availability

Inventory answers

What is listed—and what is not?

Listings show only details approved for public use. If a voltage class has no public unit, send your requirement and we can check private sources.

Are all currently listed units available?

Yes. J&J confirmed all currently listed units available on September 24, 2026, including the Prolec GE 132/176/220 MVA 345/34.5 kV transformer. Subject to prior sale; final allocation and delivery terms are confirmed in writing with Tommy Marco at 346-276-9540 or tommy@jjtransformers.com.

What is the condition of J&J's current inventory?

All current units listed by J&J Transformers LLC are available. All are brand new, never used and never energized, except the three rebuilt ABB 230/13.8 kV transformers in lot JJ-ABB-230-13-3. J&J confirmed condition and availability on September 24, 2026. Subject to prior sale and written reconfirmation; final allocation and delivery terms are confirmed in writing.

Is the ABB / Hitachi 220 MVA 230/34.5 kV transformer new and unused?

Yes. The ABB / Hitachi 220 MVA, 230/34.5 kV transformer, listing JJ-230-220-1, is available, brand new, never used and never energized. It was built for a project that did not proceed. Contact Tommy Marco at 346-276-9540 or tommy@jjtransformers.com for specifications, pricing and current written availability confirmation. Subject to prior sale.

Where is the listed equipment located?

Equipment location: USA for every currently listed unit except the Kolektor ETRA units, which are in Slovenia. Sugar Land, Texas is J&J's company base, not the equipment location.

Which ABB lot is rebuilt, and what are its ratings?

JJ-ABB-230-13-3 is the only rebuilt lot in the current inventory: three ABB 230/13.8 kV transformers, rated 40/53.3 MVA at 55 C and 44.8/59.7 MVA at 65 C. It is not a 100 MVA lot and is separate from the new, never-energized ABB / Hitachi 220 MVA 230/34.5 kV unit. Equipment location: USA. Rebuild scope and included accessories require written reconfirmation; subject to prior sale.

Do you have a 66/34.5 kV transformer?

Yes. J&J lists a WEG 54/79/90 MVA, 66/34.5 kV transformer with Dyn1 connections and low-side LTC. Its rated high side is 66 kV. Contact Tommy for the technical package and availability.

Do you have 69 kV transformers?

No public transformer with a 69 kV high side is listed right now. One public ABB 230 kV autotransformer record is reconnectable for 115 kV or 69 kV service. Send the required MVA, exact ratio, quantity, site, and needed-on-site date.

Do you have 115 kV transformers?

Yes. The public inventory includes two Virginia Transformer groups covering five represented 115/34.5 kV unit IDs in 60 MVA- and 84 MVA-class ratings. Written reconfirmation is required.

Do you have 138 kV transformers?

Yes. Public records include Georgia Transformer and Kolektor ETRA 138/34.5 kV opportunities plus an IEN Hanchang / JCL 138/13.8 kV design package. Evidence and open items differ by listing.

Do you have 161 kV transformers?

Yes. The Siemens Energy 63/84/105 MVA 161/34.5 kV transformer is brand new, never used and never energized, with a 13.8 kV additional winding. Current availability requires written confirmation; subject to prior sale.

Do you have 230/34.5 kV or 345/34.5 kV transformers?

Yes. 230/34.5 kV listings include ABB / Hitachi 220 MVA, Fortune Electric 167 MVA, and WEG 88 MVA units. The available 345/34.5 kV units are Prolec GE 132/176/220 MVA and Georgia Transformer 108/144/180 MVA. All these units are brand new, never used and never energized. Call 346-276-9540 for specs, price, and availability. Subject to prior sale.

Do you sell generators and turbines?

Yes. Jenbacher J420E natural-gas generators: 60 available immediately; 117 on the way, specified at nominal 1.5 MW each, 50 Hz and 400/231 V. Availability requires written reconfirmation and is subject to prior sale. J&J also supplies diesel generators and gas and steam turbines; no turbine lot is public right now.

Can I request equipment that isn’t listed?

Yes. J&J supplies power transformers, diesel and natural-gas generators, and gas and steam turbines beyond the public inventory. Submit your MVA or MW, voltages, quantity, project location and required date, or call Tommy Marco at 346-276-9540. Availability and technical fit are confirmed for each candidate.

Who do I call?

Call Tommy Marco at 346-276-9540 or email tommy@jjtransformers.com.

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