Generator Step-Up (GSU) Transformers
Generator step-up transformers purpose-built for power plants — connecting generators to the transmission grid at elevated voltage. Optimised for continuous full-load operation with low losses, high reliability, and enhanced short-circuit withstand.
Engineering Features
Continuous Full-Load Rated
Designed for 100% continuous duty at nameplate rating — no derating required for base-load generator operation.
Technical Data
| Parameter | Range / Value |
|---|---|
| Rated Power | 10 – 200 MVA |
| Voltage Ratio | Up to 132 kV / 6.6–22 kV |
| Frequency | 50 / 60 Hz |
| Vector Group | YNd1 / YNd11 |
| Impedance | 12% – 18% |
| Cooling | ONAN / ONAF / OFAF |
| Tap Changer | OLTC ±10% / 17 steps |
| Temperature Rise | Top oil ≤ 55K, Winding ≤ 60K |
| Standards | IEC 60076 / IEEE C57.116 |
| Design Life | 40+ years |
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
Generator step-up transformers for GCC thermal, nuclear and renewable power plants. 10 MVA to 500 MVA up to 765 kV per IEC 60076 — KEMA short-circuit certified and engineered for the region's 50 °C+ ambient. Supplied to DEWA, ADWEC, SEC, KAHRAMAA, the Barakah nuclear plant and renewable IPPs at the Mohammed bin Rashid Al Maktoum Solar Park, Sakaka, Sudair and NEOM.
Barakah Nuclear Plant 4×1400 MW GSU · UAE
DEWA Hassyan & Jebel Ali CCGT GSU
ADWEC Taweelah & Mirfa Power Plants
MBR Solar Park 5GW GSU · Dubai
Saudi PIF Renewable IPP GSU · Sakaka, Sudair
NEOM Renewable Hub GSU · Saudi NW
Where Generator Step-Up (GSU) Transformers Excel.
Barakah Nuclear Plant 4×1400 MW GSU
Generator step-up transformers for the Barakah Nuclear Plant 4×1400 MW units — IEC 60076 with KEMA short-circuit certification.
DEWA Hassyan & Jebel Ali CCGT GSU
Generator step-up transformers for DEWA Hassyan and Jebel Ali combined-cycle power-plant generation step-up.
MBR Solar Park 5 GW GSU
Renewable IPP step-up transformers for the Mohammed bin Rashid Al Maktoum Solar Park 5 GW gigascale build-out.
Saudi PIF Renewable IPP GSU
GSU transformers for Saudi PIF-backed renewable IPPs at Sakaka, Sudair and NEOM renewable hubs.
Frequently Asked Questions
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Related Knowledge
FAQs, glossary terms and sizing steps mapped to this product.
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