Generator Step-Up (GSU) Transformers
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High-Reliability Voltage Step-Up Solutions for Marine and Offshore Power Generation Systems
In marine and offshore projects, the energy produced by onboard or platform-based generators must be stepped up to medium or high voltage levels for efficient transmission and distribution. Generator Step-Up (GSU) transformers used in such applications require exceptional mechanical strength, thermal stability, and continuous-duty performance.
ESTA GSU Transformers are specifically engineered for offshore platforms, FPSO units, marine power plants, and ship-based power generation systems where operational reliability is critical.
Electrical Scope
Power Range
1 MVA – 100 MVA (project-dependent)
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
- 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. Therefore, 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?
In offshore and marine power generation, operational failure is not an option.
ESTA GSU Transformers combine advanced engineering, marine-compliant manufacturing capability, and project-driven customization to deliver dependable performance in the most demanding environments.