Power Transformers

Dielectric Fluids

Renewable Insulation Liquids for Transformers

Turning electrical assets into green machines BY RONNY FRITSCHE & GEORG PUKEL, Siemens AG Transformers are one of the most important components of energy grid systems. They enable the efficient transport of electric energy from the location where the energy is generated to the location where...

Electrical Transformers

Advancements in Dissolved Gas Analysis: Risk Assessment

In general, the purpose of periodic screening with DGA for power transformers is risk assessment. Is any transformer likely to fail in service? If so, how severe is the problem? Previous articles in this series have described ways to improve DGA interpretation. In this article we provide a glimpse...

Transformer Testing & Maintenance

Transformer Diagnostic Testing

Transformer diagnostic testing: standards to diagnose equipment with Sweep Frequency Response analysis BY VOLNEY NARANJO, Megger Sweep Frequency Response Analysis (SFRA) has become a powerful tool in advanced power transformer assessments and probably one of the main and first tools used to...

Utility Transformers

Special Power: ‘Flexible Transformer’ Could Become The Grid’s New Superhero

The world is mobilizing to meet net-zero emission targets over the coming decades, and it seems that everywhere you look, countries are erecting wind turbines in the fields and off the coasts, switching from coal to natural gas, adding hydropower storage, and studying the next generation of nuclear...

Transformer Protection

FERC Rejects PJM Transmission Planning Change

The Federal Energy Regulatory Commission (FERC) has rejected a proposal from PJM Interconnection, one of the United States' largest regional transmission organizations, to alter its transmission planning protocol. The decision represents a significant victory for state regulators who had expressed...

Transformer Software & Technologies

Enhancing Transformer Resilience: Fire Barriers and Safety Measures in Modern Substations

The Growing Concern of Transformer Fire Risks An Electrical Substation Transformer is a critical component of modern substations, playing a vital role in the transmission and distribution of electricity. However, due to the high-voltage operations, flammable insulation materials, and exposure...

Home Transformation Power Transformers

The Truth About Cast-Resin Transformers

Debunking the myths surrounding aluminum usage

BY SCOTT MAY, VIJAI NARAYANAN, ANDREW LAWLESS, Siemens

Much has been written about the use of aluminum versus copper for transformer conductors within the electrical industry. Aluminum conductors have been used successfully in the electrical industry for more than 100 years; unfortunately, misconceptions about their applications still exist. In Europe, aluminum has been used as the standard material for cast-resin transformer windings for many decades.

However, following the...

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