🇺🇸 Transformer Industry — United States

The US is a massive, 60 Hz market in the middle of a transformer supply crunch. Grid hardening, renewables, data-centre load growth and ageing infrastructure are driving demand for both liquid-filled and dry-type distribution and power transformers, with a strong emphasis on ANSI/IEEE compliance and short lead times.

41manufacturers tracked

3grid operators

60 Hz3 interconnections

8upcoming events

Grid & utilities

Eastern InterconnectionPJM, MISO, SPP, NYISO, ISO-NE, SERC — world's 2nd-largest sync area765 kV ↗

Western Interconnection (WECC)CAISO + western utilities, 14 states + BC/AB + Baja500 kV ↗

ERCOT (Texas)Standalone sync grid — DC ties only to East/Mexico345 kV ↗

Transformer manufacturers

59 maker records in the United States census — power, distribution and dry-type. All United States manufacturers →

Prolec GE (GE Vernova)Shreveport, LAPT,DT

Prolec GE WaukeshaWaukesha, WIPT

Hitachi Energy USASouth Boston, VAPT

Siemens EnergyCharlotte, NCPT

EatonBeaver, WVDT,DRY

Virginia Transformer CorpRoanoke, VAPT,DT,DRY

Pennsylvania Transformer TechnologyCanonsburg, PAPT

Delta StarLynchburg, VA + San Carlos, CAPT,DT

HD Hyundai Power Transformers USAMontgomery, ALPT

Mitsubishi Electric Power Products (MEPPI)Memphis, TNPT

HICO America (Hyosung)Memphis, TNPT

WEG Transformers USAWashington, MOPT,DT

Niagara Power TransformerBuffalo, NYPT

LS Electric AmericaBastrop, TXPT,DT

+27 more on the country page.

Components & suppliers

Transformer bushings On-load tap changers Cooling systems Insulation materials Conductors & core steel Oil & preservation Protection & monitoring Tank & mechanical

Projects & intelligence

DOE closes up to $3.26bn loan to AEP Texas — ~100 transmission projects, up to 41 GW of new load
Energy Dominance Financing loan (announced 8 Jul) backs ~100 transmission projects/upgrades spanning ~2,800 miles incl. reconductoring and new lines; AEP Texas has agreements supporting up to 41 GW of…
LUMA energises three new power transformers in Puerto Rico — orders placed years ahead due to lead times
New units at Sabana Llana (Carolina), Crea (Bayamón) and Mora (Isabela) substations serve ~782,500 customers, funded via DOE/FEMA; LUMA notes utilities must now order transformers years in advance — a…
Transformer and breaker backlogs persist despite reshoring progress
Despite ~$2bn directed toward North American transformer production expansion (new capacity online by 2028), backlogs for transformers and breakers persist as demand keeps outpacing reshored supply — …
~$2bn directed to North American transformer capacity (online by 2028)
Hitachi Energy, Siemens Energy and others expanding, but new capacity won't relieve the current shortage before 2028.

Upcoming events

Western Energy Institute Annual Meeting 2026 13 Sept 2026 · Phoenix, USA
NEMA Annual Meeting 2026 (Denver) 29 Sept 2026 · Denver, USA
EPIC 2026 — Electric Power Industry Conference 11 Oct 2026 · Fort Worth, USA
IEEE PES Transformers Committee — Fall 2026 18 Oct 2026 · Fort Lauderdale, USA
CIGRE USNC Grid of the Future Symposium 2026 26 Oct 2026 · Richmond, USA
Western Energy Institute Annual Meeting 2026 (Phoenix) 3 Nov 2026 · Phoenix, USA
NEMA Annual Meeting 2026 10 Nov 2026 · St. Petersburg, USA
CEATI Transmission & Distribution Conference 2026 17 Nov 2026 · Denver, USA

Technical context

765 kV / 500 / 345 / 230 / 138 / 69 kV transmission; 60 Hz
ANSI / IEEE / NEMA standards (IEEE C57 series)
Distribution transformers (pole-mounted, pad-mounted, dry-type) widely used
Data-centre and renewables load growth driving 138–345 kV demand
RDIs and regulatory focus on transformer supply security and lead times

Frequently asked

What standards apply in the US?

ANSI/IEEE C57 standards govern transformer design and testing, with NEMA for distribution equipment; the US uses 60 Hz.

Why is there a US transformer shortage?

Under-investment in domestic capacity, a surge in data-centre and renewables load, and long lead times for large units have created sustained supply pressure and higher prices.

How can buyers source US-compliant transformers?

Use the TransformerPath USA manufacturers directory, then submit an RFQ specifying the IEEE class, voltage and rating required.