EHV Power Transformers
Extra high voltage power transformers for transmission-class applications. Up to 300 MVA, 220–400 kV — KEMA short-circuit certified with advanced directed cooling.
Engineering Features
KEMA Short-Circuit Testing
KEMA-witnessed short-circuit withstand testing for proven reliability under fault conditions.
Technical Data
| Parameter | Range / Value |
|---|---|
| Rated Power | 100 – 300 MVA |
| Primary Voltage | 132 – 400 kV |
| Secondary Voltage | 11 – 36 kV |
| Frequency | 50 / 60 Hz |
| Impedance | 10% – 14% (customizable) |
| Vector Group | As per specification |
| Noise Level | ≤ 75 dB(A) at 1m |
| Total Losses | Per IEC/IEEE guaranteed values |
| Temperature Rise | Top oil ≤ 60K, Winding ≤ 65K |
| Insulation Level | Full BIL / SIL as per class |
Standard range parameters — custom specifications available on request.
Related glossary terms
DEWA Approved
Dubai Electricity & Water Authority vendor
ADDC / AADC
Abu Dhabi Distribution Company approved
SEWA / FEWA
Sharjah & Federal Electricity authorities
ADNOC AVL
ADNOC Approved Vendor List
IEC 60076
International standard for power transformers
ARAMCO 17-SAMSS
Saudi ARAMCO material specification
Extra High Voltage power transformers for GCC bulk-transmission systems — 100 MVA to 300 MVA at 220 kV, 275 kV, 380 kV and 400 kV. Manufactured to IEC 60076 with directed-oil-flow cooling and KEMA short-circuit certification, our EHV portfolio serves DEWA, ADWEC, SEC, KAHRAMAA and the GCC Interconnection Authority — including transmission autotransformers, generator step-up at gas-turbine and nuclear plants, and renewable IPP grid-interconnect at the Mohammed bin Rashid Al Maktoum Solar Park and NEOM.
GCCIA 400kV Cross-Border Interconnect
SEC 380kV Bulk Transmission · Saudi Arabia
DEWA 400kV Substation Autotransformers · Dubai
ADWEC Generator Step-Up · Barakah & Taweelah
MBR Solar Park 400kV Step-Up · Dubai 5GW
NEOM Bulk Transmission · Saudi NW Region
Where EHV Power Transformers Excel.
GCC 220/400 kV Transmission
IEC 60076 EHV transformers for DEWA, TRANSCO, NGSA and OETC 220 kV and 400 kV transmission substations.
GCC Power Generation (GSU)
Generator step-up transformers for Barakah Nuclear, Hassyan, Sudair Solar PV and other major GCC generation assets.
GCC Interconnector Projects
EHV auto-transformers for the GCC Interconnection Authority super-grid and cross-border transmission upgrades.
Strategic Grid Infrastructure (UAE/KSA)
EHV transformers for Vision 2030 / UAE Centennial 2071 grid reinforcement and giga-project utility infrastructure.
Frequently Asked Questions
Related Knowledge
FAQs, glossary terms and sizing steps mapped to this product.
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