Acidity Test of Transformer Insulating Oil

Causes of Acidity in Insulating Oil In insulating oil in the transformer may occasionally come into contact with air. It may be during opening any blanking or due to leakage in the oil tanks or in associated pipe lines. Because of that the oxidation reaction in the transformer oil takes place, which further be accelerated … Read more

Causes of Insulating Oil Deterioration

In normal service life of an oil filled equipment, the insulating oil inside the equipment is subjected to deterioration, due to various causes. In normal service span of the equipment there are many maintenance occasions, when due to opening of blanking or any other reason the oil comes in contact with air. The air can … Read more

Collecting Oil Sample from Oil Immersed Electrical Equipment

Process of Collecting Oil from Oil Immersed Electrical Equipment Like Transformer. We collect oil sample for performing different tests on the oil to determine different physical, chemical and electrical characteristics of the oil. The sample is the representative of the oil inside the equipment. That is why, we take special care during collecting oil sample … Read more

Principle of Water Content Test of Insulating Oil

The measure water content in an insulating oil we use Karl Fisher Titration as basic technique. In Karl Fisher Titration, water (H2O) chemically reacts with iodine (I2), sulfur dioxide (SO2), an organic base (C5H5C) and alcohol (CH3OH) in an organic solvent. Here, the sample is mixed with sulfur dioxide, iodide ions, and organic base/alcohol. Here, … Read more

Transformer Oil: Testing, Types & Properties

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). Transformer … Read more

Dissolved Gas Analysis (DGA) Test of Transformer Oil

Dissolved gas analysis (DGA) is the study of dissolved gases in transformer oil. It is also referred to as a DGA test. Whenever a transformer undergoes abnormal thermal and electrical stresses, certain gases are produced due to the decomposition of the transformer oil. When the fault is major, the production of decomposed gases are significant … Read more