Generator Step-Up (GSU) Transformers
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Generator Step-Up (GSU) transformers are critical components used to increase generator output voltage to transmission levels, ensuring efficient and reliable power transfer to the grid.
In marine and offshore applications, these transformers must operate continuously under harsh environmental conditions while maintaining high thermal stability, mechanical strength, and operational reliability.
ESTA GSU Transformers are engineered for offshore platforms, marine vessels, FPSO units, and power generation systems where failure is not an option.
Electrical Scope
Power range
1 MVA – 100 MVA
Primary voltage
400 V – 15 kV
Secondary voltage
6.6 kV - 66 kV
Frequency
50 Hz / 60 Hz
Cooling Methods
ONAN / ONAF / OFAF / OFWF
On-load tap changer (OLTC)
Available
Fully engineered-to-order configurations available.
Applications
Offshore oil and gas platforms
FPSO production vessels
Marine-based power generation modules
Shipboard cogeneration systems
Offshore wind integration systems
Marine industrial power plants
Marine & Offshore-Specific Design
High Mechanical Strength
- Windings designed to withstand high short-circuit forces
- Reinforced tank structure for offshore conditions
- Vibration-resistant mechanical design
Environmental Protection
- C5-M corrosion protection system
- Salt mist resistant coating
- Heavy-duty offshore paint systems
Electrical Performance
- Low-loss magnetic core design
- High efficiency under continuous load
- Harmonic-compatible winding configuration
- High insulation strength for elevated voltage levels
Engineering Capability
ESTA provides:
- Electromagnetic design calculations
- Short-circuit force analysis
- Thermal performance modeling
- Mechanical integrity assessment
- Project-specific FAT procedures
Each transformer is engineered according to generator characteristics and site-specific environmental conditions.
Operational Advantages
- High power density
- Offshore-ready structural design
- Long operational lifespan
- High energy efficiency
- Reduced maintenance requirements
- Maximum reliability for critical generation systems
Reliability for Critical Power Systems
GSU transformers are among the most critical components in marine and offshore power generation systems. ESTA designs focus on:
- Continuous duty operation
- High load fluctuation tolerance
- Long service life
- Reduced failure risk
- Optimized thermal performance
Standards & Compliance
Designed and manufactured in accordance with:
- IEC 60076
- Offshore and power generation standards
- Marine classification requirements (DNV, BV, ABS, LR)
Class-approved production available upon request.
Why ESTA?
Maximum Reliability for Critical Power Applications
In offshore and marine power generation, operational failure is not an option. ESTA delivers fully engineered-to-order GSU transformers with proven performance, fast delivery, and compliance with international standards.