UHV Power Transformers
Ultra high voltage power transformers for the highest transmission-class applications. 200–500 MVA, 400–765 kV — leveraging global JV partnerships including Skipper ETS India for world-class UHV capability.
Engineering Features
KEMA Short-Circuit Testing
KEMA-witnessed short-circuit withstand testing — essential for UHV-class fault currents.
Technical Data
| Parameter | Range / Value |
|---|---|
| Rated Power | 200 – 500 MVA |
| Primary Voltage | 400 – 765 kV |
| Secondary Voltage | 11 – 36 kV |
| Frequency | 50 / 60 Hz |
| Impedance | 12% – 18% (customizable) |
| Vector Group | As per specification |
| Noise Level | ≤ 80 dB(A) at 1m |
| Total Losses | Per IEC/IEEE guaranteed values |
| Temperature Rise | Top oil ≤ 55K, Winding ≤ 60K |
| Insulation Level | Full BIL / SIL as per UHV class |
Standard range parameters — custom specifications available on request.
Related glossary terms
IEEE C57.12
ANSI/IEEE distribution transformer standard
ANSI C57.12.00
General requirements liquid-immersed
DOE 2016
US Department of Energy efficiency rule
NEMA TR1
Sound level & loss tolerances
UL Listed
Underwriters Laboratories safety mark
IEEE C57.110
Harmonic-loaded transformer rating
Ultra High Voltage power transformers for the North American Bulk Electric System — 200 MVA to 500 MVA at 500 kV and 765 kV. Manufactured through our Skipper ETS India JV to IEEE C57.12.00 / ANSI C57 with KEMA short-circuit certification and full seismic qualification. Our UHV portfolio supports AEP's 765 kV network, MISO and PJM bulk-transmission upgrades, HVDC converter-station interfaces and gigawatt-scale renewable interconnect.
AEP 765kV Bulk Transmission · Ohio Valley
MISO 500kV Inter-Regional Tie Lines
ERCOT 500kV West Texas Renewable Hubs
HVDC Plains & Eastern Converter Stations
Bonneville Power 500kV · Pacific Northwest
TVA 500kV Bulk Transmission · Tennessee Valley
Where UHV Power Transformers Excel.
500 kV Backbone Transmission
IEEE C57.12 UHV transformers for 500 kV backbone transmission across BPA, WAPA, Western US and Eastern Interconnection.
765 kV AEP & Eastern Grid
765 kV class UHV transformers for AEP, FirstEnergy and other US 765 kV transmission systems.
Large Hydro & Nuclear GSU
GSU transformers for large hydro, nuclear and clean-energy generation feeding US bulk transmission.
HVDC Converter Station AC Side
UHV transformers for HVDC converter station AC-side duty, including planned cross-country macro-grid links.
Frequently Asked Questions
Deployed in
Related Knowledge
FAQs, glossary terms and sizing steps mapped to this product.
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