Why do we use oil in transformer?
Transformer oil is a mineral based oil that is commonly used in transformers for its chemical properties and dielectric strength. This oil in your transformer acts as an insulator and a cooling agent. The acid will form sludge which settles on the windings of the transformer resulting in reduced heat dissipation.
What is the benefit of using oil in high power transformers?
Transformer oil is used as a cooling medium for oil-immersed transformer, and the heat generated by transformer operation is transmitted from transformer oil to metal shell and emitted. It has the advantages of fast heat dissipation, uniform conduction and recoverable insulation performance of the oil.
What happens when transformer oil is low?
A very low oil level can expose energized and current-carrying components that are designed to operate in oil and could result in overheating or an electrical flashover. If the oil level is too high, it could cause over pressurization when the oil expands.
What is BDV value of transformer oil?
BDV stands for Breakdown Voltage. It is also called as dielectric strength value. It is the dielectric strength of transformer oil. This can indicates the presence of contaminants.
What are the components of transformer oil?
Transformer mineral oil contains a mixture of different hydrocarbons but is generally composed of three main components: alkanes, cycloalkanes and aromatic hydrocarbons.
What is BDV?
BDV means break-down voltage, also named as Dielectric Strength Valve. BDV Test is an very important testing procedure for the insulation oils in transformer. When the testing result shows a very low value, the oil has to be replaced or purified.
What is BDV value of transformer?
What liquid is inside a transformer?
Transformer oil or insulating oil is an oil that is stable at high temperatures and has excellent electrical insulating properties. It is used in oil-filled transformers, some types of high-voltage capacitors, fluorescent lamp ballasts, and some types of high-voltage switches and circuit breakers.
Which is the cause for deterioration of transformer oil?
Transformer oil deterioration is caused by moisture and oxidation. Deterioration is mainly due to contamination, overheating, electrical stress, and oxidation. There are two main mechanisms occurring in the transformer oil during operation which cause deterioration.
What is the role of transformer oil in a transformer?
It absorbs the excess amount of heat when the transformer is operational and keeps the transformer cool from inside. So, the transformer oil primary functions are cooling and insulating the transformer. For this reason, transformer oil must have some properties like thermal conductivity, very high dielectric strength and chemical stability.
How does the duty cycle work in a transformer?
The duty cycle begins from pumping the dirty oil from the equipment (or container) to a heat chamber. After heating the oil to a predetermined temperature, it is then filtered through edge type filter or filter press to remove all suspended impurities.
Do you need to test oil in a transformer?
One way is by doing annual oil testing. The types of routine and non-routine tests that are needed will depend on factors such as the importance and the criticality of the transformer. Pulling an oil sample is the cheapest and easiest thing to do on an energized transformer, as long as you have safe access to the valves.
What happens to transformer oil during DGA test?
If during DGA test of transformer oil, CO and CO 2 are found in large quantity it is predicted that there is decomposition of proper insulation. Transformer core and winding have mainly paper insulation.
What kind of oil in used for transformer?
Mineral oils are still widely used in the industry. Mineral oil is generally effective as a transformer oil, but it has some disadvantages, one of which is its relatively low flashpoint versus some alternatives. If a transformer leaks mineral oil, it can potentially start a fire.
Which purpose oil is used in a transformer?
Transformer oil (also known as insulating oil) is a special type of oil which has excellent electrical insulating properties and is stable at high temperatures. Transformer oil is used in oil-filled electrical power transformers to insulate, stop arcing and corona discharge , and to dissipate the heat of the transformer (i.e. act as a coolant).
What is the function of the oil in a transformer?
Transformer oil or insulating oil is an oil that is stable at high temperatures and has excellent electrical insulating properties. It is used in oil-filled transformers, some types of high-voltage capacitors, fluorescent lamp ballasts, and some types of high-voltage switches and circuit breakers.Its functions are to insulate, suppress corona discharge and arcing, and to serve as a coolant .
What are the types of transformer oil?
There are two types of Transformer Oil, Naphthenic and Paraffinic based Transformer Oils. A comparison between the Naphthenic and Paraffinic Transformer Oil is listed below.