What is naphthenic transformer oil?
Why Naphthenic Transformer Oils Have Been the Standard Refined naphthenic mineral oils have long enabled the safe and smooth operation of transformers, switchgear, circuit breakers and rectifiers. These oils replaced their environmentally hazardous predecessors, which contained polychlorinated biphenyl (PCB).
What kind of oil is used in electrical transformers?
mineral oil
Transformer oil is most often based on mineral oil, but alternative formulations with different engineering or environmental properties are growing in popularity.
What is the properties of good insulating oil?
An Insulating Oil must have the following properties: 1) Excellent dielectric properties resulting in minimum power loss. 2) High resistivity leading to better insulation values between windings. 3) High flash point and thermal stability facilitating reduction in evaporation losses.
How do you make naphthenic acid?
Naphthenic acids are generally obtained by caustic extraction of petroleum distillates boiling between 200 and 370 °C. A continuous process has been developed for removing naphthenic acids from refinery streams by caustic washing. Caustic extraction also removes other acidic components of the petroleum fraction.
What is hydrotreated heavy naphthenic?
What are Distillates (petroleum), hydrotreated heavy naphthenic? They are high quality naphthenic base oils with a low pour point and good solvency properties. They have been extensively hydrotreated resulting in low aromatic, clear, bright and less coloured mineral oil with excellent stability.
Is naphthenic oil mineral oil?
Crude oil is extracted from the bedrock before being processed in several stages, removing natural contaminants and undesirable hydrocarbons. This separation process produces mineral oil, which can in turn be denoted as paraffinic, naphthenic or aromatic.
What are the properties of the insulating oil of the transformer?
The properties (or parameters) of transformer oil are:
- Electrical properties: Dielectric strength, specific resistance, dielectric dissipation factor.
- Chemical properties: Water content, acidity, sludge content.
- Physical properties: Interfacial tension, viscosity, flash point, pour point.
Why do we insulate transformer oil?
The main function of insulating oil in a transformer is to provide electrical insu- lation between the various energized parts; it also acts as a protective coating layer to prevent oxidation of the metal surfaces. Another important function of the oil is to enhance heat dissipation.