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

346-276-9540 tommy@jjtransformers.com
J&J Transformers LLC logoJ&J Transformers LLCPOWER EQUIPMENT SALES

Current equipment

Power transformers for sale

Power transformers, generators and turbines for data centers, utilities and industrial projects. Based in Sugar Land, Texas. Supplying projects nationwide.

Current power equipment inventory

TransformersGeneratorsTurbines
High-side voltage
66 kV69 kV115 kV120 kV138 kV161 kV230 kV345 kV525 kV

Current listings

Transformer listings

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
Email for Specs & Price 346-276-9540
JJ-SMIT-525-3Transformer

Three Royal SMIT 240/320/400 MVA 525/69 kV Transformers

Royal SMIT transformer from the three-unit 525/69 kV lot
Equipment photo from the three-unit lotOpen full size ↗
Royal SMIT nameplate drawing showing 240/320/400 MVA and a 250 MVA step-down limit
Nameplate and winding drawingOpen full size ↗
OEM
Royal SMIT
MVA
240/320/400 MVA; 250 MVA maximum step-down; 90 MVA tertiary
High side
525 kV
Low side
69 kV
Tertiary
13.7 kV
Vector group
YNyn0(d1) — Wye–Wye / buried Delta
Qty
3 units
Condition
2022 manufacture shown in supplied nameplate; condition and service history confirmed with quotation
Equipment location
Netherlands
Availability
Immediately available
Shipping
4–8 weeks to ship
Email for Specs & Price 346-276-9540
See all transformer listings

Previously listed units were confirmed available by J&J on September 24, 2026; the three Royal SMIT units were confirmed on October 1, 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.

J&J Transformers LLC

Recent sales

Transformers and power equipment sold by J&J.

Two 100 MVA Waukesha transformers

Waukesha transformer from J&J’s sale of two identical 100 MVA units

SOLD

138/13.8 kV. Two identical transformers sold for a data center project with an urgent equipment requirement.

75 MVA Prolec transformer

75 MVA Prolec transformer sourced by J&J for a Texas data center

SOLD

69/34.5 kV · Wye–Wye. Sourced for a Texas data center facing a tight project schedule.

30 MVA GE transformer

30 MVA GE 69 kV transformer supplied by J&J for temporary utility power

SOLD

69 kV. Sourced and supplied to support temporary power for a utility customer.

Federal Pacific 46/12.47 kV transformer

Federal Pacific 46/12.47 kV Wye–Wye transformer supplied by J&J for a bitcoin company

SOLD

A hard-to-find Wye–Wye configuration, sourced and supplied to meet a bitcoin company’s power requirements.

Get started

Buy or sell equipment

Offering equipment?

Email the nameplate, photos, condition and location.

Offer equipment

Buying from J&J

Frequently asked questions

Tap a question to read the answer.

View all equipment FAQs
Where is the equipment located?

Locations are shown on each listing. The Kolektor ETRA units are in Slovenia and the Royal SMIT units are in the Netherlands. Other current listings are in the USA. J&J is based in Sugar Land, Texas.

What if my required unit isn’t listed?

Email Tommy your MVA or MW, voltages, quantity and required delivery date. J&J supplies transformers, generators and turbines for projects nationwide.

How do I confirm availability?

Call 346-276-9540 or email tommy@jjtransformers.com. Current condition, availability, price and delivery are confirmed in writing; subject to prior sale.

Call Email Sales