TNB Labs Newsflash

Material Compatibility with Insulating Oil

Insulating oil such as mineral oil, ester oil and silicone oil plays a critical role in the operation of transformer. Using this oil for insulation and cooling must be compatible with various materials within the transformer to ensure reliable operation. This article explores the importance of material compatibility and the effect of incompatibility.

Understanding Corrosive Sulfur in Transformer Oil

Corrosive sulfur refers to certain reactive sulfur compounds in transformer oil that can chemically attack metal components, especially copper and silver. These compounds can form metal sulfides, which are often conductive and can lead to insulation failure. This issue has been recognized for decades, with early reports dating back to 1948.

Ester Oil as an Insulating Fluid :
A Sustainable and Efficient Choice

Ester oils are increasingly being used as insulating fluids in transformers, due to their excellent dielectric properties and environmental benefits. These oils can be either natural or synthetic, with natural esters derived from vegetable oils and synthetic esters produced through chemical processes. Both types offer significant advantages over traditional mineral oils.

Powering Malaysia's Energy Transition with TNBR's BESS Expertise

From land assessment and grid planning to testing, commissioning, and lifetime maintenance, TNBR and TNB Labs offers end-to-end solutions to enhance grid reliability and support renewable energy integration.