What type of lubricants are used for transformers?

What type of lubricants are used for transformers?

Three basic types of transformer oil used are mineral oil (mostly naphthenic), silicone, and bio-based. Mineral oil based transformer oils dominate the consumption as it has good electrical and cooling properties, and provides cost-effective solution.

Is standard for BDV of transformer oil?

As per IEC, the minimum BDV of transformer oil should be 30 KV as per transformer oil BDV test standard. The transformer oil is used in the transformer for insulation as well as for cooling purpose.

What is kinematic viscosity of crude oil?

An oil’s kinematic viscosity is defined as its resistance to flow and shear due to gravity. Imagine filling a beaker with turbine oil and another with a thick gear oil. Which one will flow faster from the beaker if it is tipped on its side?

What is the grade of transformer oil?

Transformer oils

TO 1020 60 H Uninhibited IEC : 60296 – 2020 Type B Standard Grade oil
TO 1020 60 HT Trace Inhibited IEC : 60296 – 2020 Type B Standard Grade oil
TO 1020 60 HX Inhibited High Grade IEC : 60296 – 2020 Type A High Grade Oil
TO 1020 AUT Trace Inhibited ASTM D 3487- 2016 TYPE I

Which oil is used in transformer oil?

mineral oil
Today, the majority of transformers are still filled with mineral oil. But, other types of oil are becoming more and more popular and there are quite a few different types to choose from. Some alternative fluids have benefits such as high fire and flash points for indoor use or environmentally friendly attributes.

What is good BDV value of transformer oil?

A typical value of BDV Test result for 220 / 6.6 kV Transformer oil is 65 kV and moisture content should be less than 10 ppm. BDV is an important and popular test of transformer oil, as it is the primary indicator of the health of oil and it can be easily carried out at the site.

What is the importance of kinematic viscosity?

Kinematic viscosity is an important property of fuel, which directly influences the fuel atomization quality and size of the fuel droplet in the spray. In general, kinematic viscosity is measured using the ASTM Standard D445 and EN 3104 test methods.

What is a high kinematic viscosity?

Kinematic viscosity describes the absolute viscosity of the substance divided by its density. A high-density liquid with a low viscosity has a low kinematic viscosity; such a fluid flows quickly through a porous medium compared with one with a higher kinematic viscosity.