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
ENATS 35-1
DNO-approved distribution transformer specification
ENATS 35-2
UK secondary substation transformer standard
G99 Compliant
Engineering Recommendation G99 grid interface
BS EN 60076
British Standard for power transformers
KEMA Certified
Independent short-circuit witness testing
EcoDesign Tier 2
EU 548/2014 efficiency compliance
Ultra High Voltage power transformers for the UK transmission system and HVDC interconnections. 200 MVA to 500 MVA at 400 kV and 525 kV, leveraging our JV with Skipper ETS India for world-class UHV manufacturing capability. Designed to BS EN 60076 / IEC 60076 with KEMA short-circuit certification, our UHV portfolio supports National Grid Electricity Transmission, offshore-wind HVDC converter stations and the UK's interconnector projects (IFA2, NeuConnect, Viking Link).
National Grid 400kV Bulk-Transmission Substations
Offshore Wind HVDC Converter Stations · UK North Sea
Viking Link & NeuConnect Interconnector Stations
SSEN Transmission UHV Substations · Scotland
Nuclear New-Build GSU · Hinkley Point C
Pumped-Storage Hydro Step-Up · Scottish Highlands
Where UHV Power Transformers Excel.
UK 400 kV Super-Grid
BS EN 60076 UHV transformers for National Grid 400 kV super-grid reinforcement and the Great Grid Upgrade programme.
HVDC Interconnector Substations
UHV-class transformers for North Sea Link, Viking Link and future UK-Europe HVDC interconnector AC substations.
Strategic UK Generation
Generator step-up transformers for Hinkley Point C, Sizewell C and other strategic UK generation projects.
UK Offshore Wind Bulk Transmission
Bulk-power UHV transformers for Dogger Bank, Hornsea and other UK offshore wind onshore connection points.
Frequently Asked Questions
Deployed in
Related Knowledge
FAQs, glossary terms and sizing steps mapped to this product.
Ready to Specify UHV Power Transformers?
Share your technical requirements and our engineering team will provide a detailed proposal with guaranteed performance parameters.