01Transformer Manufacturers: Identify the Unit, Not Just the Logo
A manufacturer's name is a useful starting point, not a purchase decision. California Transformer Buyer reviews single units and mixed lots, from previously energized equipment to never-energized project leftovers. An unfamiliar or discontinued brand is not, by itself, a reason to leave a transformer out of your inquiry.
The nameplate connects the brand to the actual design: capacity, voltage, phase, cooling and serial number. These details help verify specifications and investigate parts compatibility. A familiar logo does not establish that replacement bushings, switches or other components remain available.
DIRTransformer Brands We Buy
- ABBLearn which ABB transformers California Transformer Buyer reviews and what nameplate, condition and site information to send.
- Hitachi EnergyLearn what Hitachi Energy transformers California Transformer Buyer considers and what details help Rocky review your unit.
- GE & Prolec GELearn which GE and Prolec GE transformers we review and what details to send for a written offer in California.
- Eaton (Cooper Power Systems)Learn which Eaton and Cooper Power Systems transformers California Transformer Buyer considers and what details help evaluate a unit.
- SiemensLearn what Siemens transformers we buy, what nameplate details to send and how rating and condition affect a California offer.
- Square D (Schneider Electric)Learn what Square D transformer information to send when requesting an offer from a California buyer.
- Howard IndustriesLearn how to identify, document and sell a used or surplus Howard Industries transformer in California.
- ERMCOLearn what ERMCO transformers we review, which nameplate details to send and how condition and ratings affect a potential offer.
- WestinghouseLearn what Westinghouse transformers California Transformer Buyer considers and what details help Rocky review your unit.
- McGraw-EdisonCalifornia sellers can submit McGraw-Edison transformer details for a unit-specific review and written offer.
- Central MoloneyLearn what Central Moloney transformers we review and what nameplate, condition and location details to send for an offer.
- Kuhlman ElectricShare Kuhlman Electric transformer nameplate details and condition for a California-based buyer’s review.
- MagnetekLearn how to identify a Magnetek transformer and submit its nameplate, condition and location details for buyer review in California.
- Pennsylvania TransformerLearn how California Transformer Buyer evaluates Pennsylvania Transformer power and substation units and what details to send for review.
- SPX Transformer Solutions (Waukesha)Learn how to sell Waukesha-branded transformers in California and what nameplate, condition and ownership details to provide.
- Virginia TransformerCalifornia sellers can submit Virginia Transformer nameplate and condition details for a unit-specific written offer.
- Delta StarSell used or surplus Delta Star power transformers and mobile substation assets in California with documented ratings and written terms.
- JST Power EquipmentCalifornia sellers can submit JST Power Equipment transformer details and photos for review and a written offer.
- Hammond Power SolutionsLearn which Hammond Power Solutions transformers we review and what nameplate details to send for a written offer in California.
- Acme ElectricLearn what Acme Electric transformers California Transformer Buyer reviews and what details to send for an offer.
- Jefferson ElectricLearn what Jefferson Electric transformers California Transformer Buyer considers and what details help Rocky evaluate your unit.
- Federal PacificLearn what Federal Pacific transformer details to send and how California Transformer Buyer reviews units for a written offer.
- Olsun ElectricsLearn which Olsun Electrics transformers we consider and what nameplate and condition details to send for a California offer.
- MGM TransformerLearn which MGM Transformer units California Transformer Buyer reviews and what nameplate, condition, and ownership details to send.
- Sola Hevi-DutyLearn which Sola and Hevi-Duty transformers we review and what nameplate and condition details to send.
- Allis-ChalmersLearn how to identify an Allis-Chalmers transformer and share the details needed for a California purchase review.
- WEGSell used or surplus WEG transformers in California with nameplate identification, condition review and written purchase terms.
- Hyundai & HyosungLearn what Hyundai and Hyosung transformers California Transformer Buyer reviews and what details help support a unit-specific offer.
- Power PartnersLearn what Power Partners transformer details to send when requesting a written offer in California.
- Marcus TransformerLearn how to sell a Marcus Transformer unit in California and what nameplate and condition details help with a buyer review.
- Meta Power SolutionsLearn how to sell a Meta Power Solutions transformer in California and what details help Rocky assess it.
- Georgia TransformerLearn how to identify, document and sell used or surplus Georgia Transformer equipment in California.
- Pioneer Power SolutionsLearn how to identify and sell a Pioneer Power Solutions-associated transformer in California using its nameplate, rating and condition.
- RTELearn how to identify an RTE transformer, what information to provide, and how to request an offer in California.
- Wagner ElectricLearn what Wagner Electric transformers California Transformer Buyer reviews and what details help assess a unit.
- Cam TranLearn what Cam Tran transformers California Transformer Buyer reviews and what information to send for an assessment.
- R.E. UptegraffLearn how to identify and sell used, surplus, or new-surplus R.E. Uptegraff transformers in California.
- CG Power (Pauwels)A practical guide to selling used, surplus and new-surplus CG Power (Pauwels) transformers in California.
02Current Brands and Legacy Names Sellers May Find
Keep the original manufacturer name in your inventory, even when the business has changed ownership. Successor relationships provide useful context, but they do not change an older unit's nameplate or prove that a current product is interchangeable.
- ABB transformer identification starts with the original ABB plate. ABB's former Power Grids business is now Hitachi Energy; that relationship does not apply indiscriminately to every ABB product.
- Hitachi Energy transformers should be documented under the name shown on the equipment, with serial numbers and available factory records.
- Eaton and Cooper Power Systems transformers may carry either name. Cooper Power Systems is now part of Eaton; retain the legacy identification when describing an older unit.
- GE and Prolec GE transformers include legacy GE identification. GE's distribution transformer business is now Prolec GE; use the exact manufacturer wording on each plate.
- Siemens transformer information helps organize inquiries for Siemens-labeled equipment. Product type and electrical configuration still need individual verification.
- Square D and Schneider Electric transformers may show Square D branding within Schneider Electric's product family. Record catalog and serial numbers when available.
03Why Ratings and Condition Matter More Than Brand
Two transformers from the same manufacturer can serve completely different applications. A 1000 kVA three-phase pad mount with a 480Y/277 V secondary is not interchangeable with a 1000 kVA unit supplying 208Y/120 V. Primary voltage, connections, taps and impedance also matter.
Condition changes the review just as much. Leaks, damaged bushings, missing accessories and undocumented repairs can affect reuse potential. New-surplus equipment needs a condition review too: never energized does not necessarily mean undamaged or properly stored.
- Capacity: record every kVA or MVA rating, including cooling stages.
- Electrical fit: include phase, HV/LV voltages, connections, taps, impedance and BIL.
- Construction: identify liquid-filled or dry-type design, fluid and winding material if documented.
- Evidence: provide factory reports, maintenance records and available recent tests.
04Match the Manufacturer to the Transformer Family
Brand alone does not distinguish a distribution transformer from a station-class power transformer. Include whether the unit is pad-mounted, pole-mounted, dry-type, part of a unit substation or a larger substation transformer. Our transformer types guide explains the main equipment families.
For a larger unit, report all nameplate cooling stages, such as 12/16/20 MVA ONAN/ONAF/ONAF, rather than only the highest rating. For dry-type equipment, include temperature rise and enclosure information. Photos should show installed accessories and the overall configuration from a safe, authorized position.
05California Voltage Fit Can Outweigh Brand Preference
A recognizable brand cannot compensate for an unsuitable voltage configuration. Common California secondaries include 120/240 V single-phase and 208Y/120 V or 480Y/277 V three-phase. Primary requirements vary by service territory and application.
A 12 kV-class description is not enough: 12,000 V delta and 12,470GrdY/7,200 V identify different configurations. Copy the actual nameplate wording rather than rounding it to a familiar utility voltage. The California transformer voltage guide provides context, but the unit's specifications control its review.
06What Older Transformer Brands Cannot Tell You About Fluid
Manufacturer and age alone cannot establish PCB concentration. Provide fluid records, testing and any PCB label already documented. Under federal classifications, non-PCB means below 50 ppm—not zero PCBs. Unknown status may require presumptions until testing or qualifying documentation establishes concentration.
California has stricter rules for PCB-containing oil, and the correct management pathway depends on testing and documentation. A working unit sold for reuse is equipment, while leaking units, drained oil and failed transformers need proper determination. Rely on qualified environmental professionals; this is not legal advice. Do not open, drain or sample equipment yourself.
07Request a Review of Your Branded or Mixed Transformer Lot
To sell an ABB transformer, sell an Eaton transformer or submit several used transformer brands together, send a separate nameplate photo for each unit. Include quantity, California location, operating history, condition and available records. You must own the equipment or have authority to sell it.
Call or text Rocky at (951) 403-5738, or request a transformer offer through the contact form. Reviewing your transformer costs nothing and carries no obligation. Any written offer states what is included, loading and rigging responsibilities, freight, and payment terms.
Take photos only from a safe position where you are authorized to be. Your qualified electrical contractor or serving utility handles de-energizing and disconnecting; removal arrangements and terms are established before pickup.
FAQBrands FAQ
Can I submit a transformer from a manufacturer not listed here?
Yes. Send the manufacturer's name, a readable nameplate photo and the unit's location and condition. The listed brands are not an exhaustive eligibility list. Rocky reviews the actual equipment and available documentation; an inquiry does not guarantee purchase. Unfamiliar names may require additional identification before an offer can be considered.
Should I list my Cooper Power Systems transformer as Eaton?
List it as Cooper Power Systems if that is what the original nameplate says, and include any Eaton documentation separately. The successor relationship is useful context, but replacing the original manufacturer name can create confusion when checking serial numbers, drawings and test records. Preserve both identities where they are documented.
Does a recognized brand make an old transformer suitable for reuse?
Not by itself. Suitability depends on electrical specifications, physical condition, test evidence and the intended application. A familiar brand cannot establish insulation condition or prove that an undocumented repair was appropriate. Supply available maintenance and testing records so the review is based on the individual unit rather than its reputation.
Can you review a transformer with an unreadable nameplate?
You can submit overall photos and any existing inventory records, drawings or test reports. Missing identification can limit verification and may prevent an offer. Do not guess at voltage or capacity from cabinet size or another nearby transformer. Additional inspection or testing, if needed, belongs with qualified professionals.
Do newer efficiency standards prevent selling older branded transformers?
DOE distribution transformer efficiency standards apply to manufacture; they do not make existing used or surplus units illegal to resell simply because newer standards exist. That does not establish suitability for a particular installation. Buyers still need to evaluate the unit's ratings, condition and applicable project requirements independently.
Are you an authorized buyer for these manufacturers?
California Transformer Buyer is not affiliated with or endorsed by any listed manufacturer or utility. Brand names identify the equipment being reviewed, not an authorization relationship. The business buys from California sellers who own their transformers or have authority to sell them; utility-owned equipment cannot be sold merely because it sits on your property.