Transformer Oil
Transformer oil or (insulating oil) is a special oil which is stable at high temperature and has excellent insulating properties. It is an important part of the transformer. It is used in oil-filled transformer to insulate the winding, suppress corona effect, cool arc and dissipate the heat produced in winding and core of the transformer. It preserves the winding and core of the transformer as they are totally immersed in it.
Function of Insulating Oil in Transformer
The main Function of the insulating oil in transformer is to insulate the winding and to dissipate the heat generated in winding and core due to any fault. It is also used to cool arc and suppress corona effect.
Properties of Transformer Oil
Some specific properties of the insulating oil must be considered to determine it’s serviceability. It’s properties has been listed below.
Electrical Properties
- High Dielectric Strength
- High Specific Resistance
Chemical Properties
- Non-Hygroscopic
- Non-acidic
- High Chemical stability
Physical Properties
- High Thermal Conductivity
- High Inter-facial Tension
- Very High Flash Point
Types of Transformer Oil
There are two main types of insulating oil used in transformer whose are listed below.
- Paraffin Oil
- Naphtha Oil
Naphtha
Naphtha is extremely volatile, strong smelting, highly flammable liquid hydro-carbon mixtures used as solvents and diluent and as raw material for the production of gasoline.