Low loss Oil Transformer

Low Loss Oil-Filled Distribution transformer

Introduction

Low loss Oil-Filled Transformer are designed to minimize energy consumption and reduce operational costs. These transformers are crucial in meeting the rising energy demand while limiting environmental impact. Governments worldwide have introduced regulations and policies to ensure that distribution transformers meet minimum energy performance standards (MEPS)

Key Features of Low Loss Transformers

Energy Efficiency

Reduced No-Load Losses: Modern low loss transformers, such as the S11, S13, S20, and S22 series, achieve significant reductions in no-load losses. For example, the S13 series offers a 25% reduction in no-load losses and an 80% reduction in no-load current compared to the S11 series

High Efficiency at Partial Load: These transformers are designed to operate efficiently even at partial loads, which is common in many applications. The efficiency at 50% load is a key metric, and modern transformers are required to meet or exceed specified minimum efficiency levels

Compliance with Standards

International Standards: Low loss transformers comply with international standards such as IEC 60076 and national standards like GB1094 in China. These standards ensure that the transformers meet rigorous safety and performance criteria

Minimum Energy Performance Standards (MEPS): Many countries have introduced MEPS for distribution transformers, specifying maximum losses and minimum efficiency values. For example, Australia's AS 2374.1.2 standard sets minimum efficiency levels for transformers ranging from 10 kVA to 2500 kVA

Advanced Materials and Design

High-Quality Core Materials: The use of high-quality cold-rolled grain-oriented silicon steel sheets reduces hysteresis and eddy current losses. For instance, the S13 series uses 23ZH90 silicon steel sheets

Optimized Winding Design: Copper foil winding improves current distribution and short-circuit resistance, enhancing the transformer's resilience and reliability

Environmental Impact

Eco-friendly Insulating Oils: Modern transformers use biodegradable insulating oils, which reduce environmental pollution in the event of leaks. These oils are highly biodegradable and provide excellent fire safety credentials .

Extended Transformer Life: Higher water saturation compared to mineral oil reduces insulation moisture content, leading to a longer transformer life .

Economic Benefits

Cost Savings: The energy efficiency of low loss transformers leads to significant cost savings over their operational life. The total cost of ownership (TCO) approach combines the initial cost of the transformer with the lifelong costs of the quoted losses, providing a more accurate economic evaluation .

Minimal Maintenance: Designed for longevity, these transformers require minimal maintenance, reducing the total cost of ownership .

Applications

Power Generation: Efficient energy production.

Transmission Networks: Reliable power distribution.

Petrochemical and Metallurgical Industries: Stable power supply.

Industrial and Mining Enterprises: Continuous operations.

Urban Infrastructure: Sustainable power solutions for airports, subways, docks, and residential areas

Conclusion

Low loss oil-filled distribution transformers, such as the S11, S13, S20, and S22 series, offer significant energy savings and environmental benefits. They comply with international standards and are designed to operate efficiently even at partial loads. By choosing these transformers, businesses and utilities can reduce operational costs and contribute to a more sustainable future .

10kV Oil Immersed Distribution Transformer energy efficiency grade table