Oil-Type Transformer

An Oil-Type Transformer, also known as an Oil-Immersed Transformer, is a highly efficient and reliable solution for power distribution and voltage transformation. In this type of transformer, the core and windings are completely submerged in high-grade insulating oil, which performs two critical functions

Cooling – The oil effectively dissipates the heat generated during operation, ensuring thermal stability and preventing overheating.

Insulation – It provides enhanced electrical insulation between internal components, improving safety and longevity.

These transformers are widely used in industrial, commercial, and utility sectors due to their robust performance, durability, and long service life.

Key Features and Benefits

Cooling and Insulation:
The oil acts as both a coolant, absorbing heat generated by the transformer, and an insulator, preventing electrical breakdown between energized parts. 
High Voltage and Power Capacity:
Oil-filled transformers are commonly used in high-voltage power transmission and distribution systems, as well as in industrial and commercial applications. 
Enhanced Efficiency:
The superior heat dissipation properties of oil allow for higher power ratings and increased efficiency compared to air-cooled transformers. 
Corrosion Prevention:
The oil helps to protect the transformer’s internal components from corrosion. 

Types of Oil-Filled Transformers

Single-phase transformers: Used for smaller power distribution.

Three-phase transformers: Used for larger power distribution and transmission.

Open-type transformers: Have an external conservator tank that is open to the atmosphere.

Closed-type transformers: Have a sealed tank and are often used in areas where environmental protection is crucial. 

Maintenance

Regular oil testing:
Transformer oil should be regularly tested for its dielectric strength, acidity, and other properties to ensure its effectiveness.
Oil filtration:
Oil filtration systems can be used to remove contaminants and moisture from the oil, prolonging its life and maintaining its insulating properties.
Oil replacement:
In some cases, the oil may need to be replaced due to degradation or contamination.