The transformer oil filtration system is a process of the carry out the unwanted sludge materials that are present in the oil. The impurities of the oil also affect the performance characteristics of the transformer. The quality and efficiency of a transformer depending on the type of insulation material used for manufacturing the transformer.

The main purpose of the filtration oil process is that it helps you to remove moisture, dissolved gases, acidity, sludge material, corrosion, and other unwanted impurities from the oil maintaining its quality.

So, this helps transformer oil to enhances its dielectric strength.

First, the temperature of the oil is increased. The first raise of oil temperature is done up to 65 celsius which helps to separate moisture and gases. Heating is important as it makes it easy to filter oil because of its decreased viscosity.

Second, the process of removing sludge and dirt from transformer oil is carried out. This is done with centrifuging process or by using a depth type filter/classical edge filter in the system.

Third, at this stage, the dehydration and degasification of the transformer oil. These are the three steps of the process of transformer oil filtration.

Let's now see the types of transformer oil filtration. There are two types of transformer oil are available in the market. The first type of transformer oil is paraffin based. And, the second type of transformer oil is naphtha based.

The crude oil obtained from the natural resources is contained n-paraffin, which means it contains alkanes. Whereas naphtha oil contains aliphatic hydrocarbons.

So, as you have understood the types of transformer oil filtration, let's move to the benefits of transformer oil filtration.

Here are some of the benefits you get from the transformer oil filtration process.

• With this process, you get improved insulation properties of the oil.
• The transformer's life span is longer and better
• There are very less chances of the transformer getting down
• You get a good return on investments that you made on your machine

When you want to determine the qualities of transformer oil, here are the properties that you need to test.

• Water Content in Percentage
• The transformer's life span is longer and better
• Neutralization Value
• Test for Oxidation Stability
• Dielectric Strength or Breakdown Voltage (BDV)
• Dissolved Gas Analysis (DGA)
• Flash Point
• Specific Resistance (Resistivity)
• Sludge Test
• Pour Point
• Viscosity
• Interfacial Tension
• Colour and appearance