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.

Advantage of Ester Oil

Environmental Benefits

Biodegradable and non-toxic, more environmentally friendly option compared to mineral oils. This reduces their environmental impact, especially in the event of spills, as they decompose naturally without harmful residues.

Fire Safety

Higher flash point and fire point (typically above 300 °C) than mineral oils, reducing the risk of fire in electrical equipment. This makes them a safer choice for both new installations and retrofitting existing equipment.

Thermal Performance

Better thermal conductivity and can operate at higher temperatures without degrading. This helps in improving the efficiency and lifespan of electrical equipment.

Moisture Absorption

Higher moisture tolerance, which helps in maintaining the integrity of the insulation system. They can absorb more water without compromising their insulating properties, thus protecting the equipment from moisture-related issues.

Ester Oil vs Mineral Oil

For more info on our Ester Oil analysis services, contact our team members :

Shaily Hatun Mohamed Saleh (shaily.hatun@tnb.com.my)

Muhammad Hadi Ahmad Fauzi (hadi.fauzi@tnb.com.my)

Roshaniza Ismail (roshaniza.ismail@tnb.com.my)

Nur Syahida Akryl Azam (nursyahida.azam@tnb.com.my)