Low Voltage Marine Transformers

10 – 1600 kVA**

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Omsan low-voltage marine transformers are designed to provide reliable and continuous operation in challenging shipboard and offshore environments. Developed to withstand high humidity, salty atmospheres, and mechanical vibrations, these transformers offer a long service life with minimal maintenance requirements.

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All products are designed and manufactured in accordance with IEC 60076, IEC 60092, and EN 50588-1 (EcoDesign) standards. Compliance with marine classification societies (DNV, BV, LR, ABS) can be provided upon request.

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Omsan focuses on commonly used power ranges in marine applications, offering optimized electromagnetic, thermal, and mechanical design at every power level.

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Main Technical Data

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• Power Range: 10 – 1600 kVA

• Voltage Level: Up to 1 kV

• Frequency: 50 / 60 Hz

• Phase: 3 Phase

• Vector Group: Dyn11, Yyn0 (others optional)

• Insulation Class: F / H

• Cooling Method: AN (Natural Air) / AF (optional)

• Protection Class: IP23 – IP65

• Environmental Class: E2

• Climatic Class: C2

• Corrosion Protection: ISO 12944 C4 / C5-M

• Ambient Temperature: -25°C / +45°C

• Relative Humidity: Up to 95%

• Noise Level: ≤ 65 dB(A)

• Efficiency: Up to 99.2%*

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*Efficiency values ​​are IEC Given at 75% load according to standards.

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Design Features

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Electromagnetic Design

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No-load losses are minimized with a high-quality, oriented silicon-steel core. High efficiency and low noise levels are achieved thanks to optimized flux density.

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Winding Structure

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Copper or aluminum windings are designed according to the application. Advanced winding geometry reduces load losses and increases short-circuit resistance.

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Insulation Technology

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High mechanical strength and reliable insulation performance in humid environments are ensured thanks to the VPI (Vacuum Pressure Impregnation) process.

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Thermal Design

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Low hotspot temperature is achieved in natural cooling (AN) thanks to optimized airflow. The AF cooling option is available for high load conditions.

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Mechanical Structure

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Compact structure resistant to vibration and mechanical stresses, suitable for marine environments.

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Corrosion Resistance

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C4 / C5-M paint system according to ISO 12944. An optional AISI 304 / 316 stainless steel cabinet option is available.

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Electrical Performance and Losses

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High efficiency and low operating costs throughout the service life are ensured thanks to optimized loss values.

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Loss Comparison Table

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Standards and Tests

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Manufactured and tested according to the following standards:

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• IEC 60076

• IEC 60076-11

• IEC 60092

• IEC 60076-5

• IEC 60076-3

• ISO 12944

• EN 50588-1 (EcoDesign)

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Routine and Type Tests

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• No-load and load loss measurements

• Dielectric tests

• Insulation tests

• Functional tests

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Detailed test reports are available upon request.

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Options

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• PT100 / PTC temperature sensors

• AF fan cooling

• Stainless steel cabinet

• Marine paint system

• Anti-vibration equipment

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Applications

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• Shipboard energy distribution systems

• Engine room applications

• Offshore platforms

• Port and coastal facilities

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Why Omsan Marine Transformers?

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• Designed for demanding marine and offshore conditions

• High efficiency up to 99.2%

• Compact and vibration-resistant construction

• Advanced VPI insulation for humid environments

• Field-proven reliable design

• Project-specific engineering solutions

• Compliance with IEC and marine standards

• Optional marine classification certificates (DNV, BV, LR, ABS)

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Omsan

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Omsan marine transformers are developed with an engineering approach that goes beyond standards, based on real operating conditions and long-term reliability.

Detailed technical documents, drawings, and test reports are available upon request.