What is the PH of transformer oil?

What is the PH of transformer oil?

7
Principle of testing the acidity of transformer oil Neutral solutions have a P.H. value of 7. Acids have a P.H. value of less than seven and alkaline substances have a P.H. value of more than 7. The acidity of common oils is 0.3 mg KOH/gram.

What is the recommended acidity value of transformer oil when it is in good condition?

The acidity of the healthy transformer oil is 0.3 mg KOH/gram. It means 0.3 milligram of KOH is required to neutralize 1 gram of insulating oil.

What tests are done on transformer oil?

Different Kinds of Transformer Oil Testing

• Visual Examination.
• Color Analysis.
• Dielectric Breakdown Voltage (BDV Test)
• Dissolved Gas Analysis (DGA Test)
• Dissolved Metals.
• Flash Point or Fire Point.
• Interfacial Tension.
• Furanic Compound.

Which acid is present in transformer?

The substances required to measure the insulating oil are Potassium hydroxide, Transformer Oil. The acidity of insulating oil is 0.3 mg KOH/g.

How can I test my acidity?

Stomach fluid is removed through a tube that is inserted into the stomach through the esophagus (food pipe). A hormone called gastrin may be injected into your body. This is done to test the ability of the cells in the stomach to release acid. The stomach contents are then removed and analyzed.

How often should transformer oil be tested?

twice a year
Routine testing of transformer oils and insulating oils on a regular schedule is an accepted industry practice. General and physical tests are suggested twice a year, dissolved gas analysis once a year, and Furan testing every 2 years for transformers in operation at least 5 years.

What causes acid in transformer oil?

Oxidization is the acid that forms in the oil when it reacts to oxygen. This acid will form sludge which will settle on the windings of the transformer reducing the heat dissipation from the transformer.

Which test indicates acidity or alkalinity?

In chemistry, the pH scale is a numeric index used to specify acidity and alkalinity of aqueous solutions.

How do you determine acidity and alkalinity?

Basically, acidity is determined by titrating the sample with sodium hydroxide to a pH of 8.3 (often called the phenolphthalein acidity – this term dates back to the time before electronic pH meters). Alkalinity is determined by titration with sulfuric acid to a pH of 4.5.

How to test transformer oil for oxidation?

Acidity Test of Transformer oil is very important test for analyzing the oxidation of transformer oil. The acidity test is conducted to measure the acidity content in the transformer oil.Transformer oil Acidity Test is carried out using a transformer oil acidity kit. The acidity of the healthy transformer oil is 0.3 mg KOH/gram.

How to determine the acidity of transformer insulating oil?

We can determine the acidity of transformer insulating oil, by a simple portable acidity test kit. It consists of one polythene bottle of rectified spirit (ethyl alcohol), one polythene bottle of sodium carbonate solution and one bottle of universal indicator (liquid).

What does D974 mean on transformer oil?

Neutralization (Acid) number: D974: New transformer oils contain practically no acids. The acidity test measures the content of acids formed by oxidation and contaminates. Measurements are made by the amount of potassium hydroxide (KOH in mg) required to neutralize the acid in one gram of oil.

What is the maximum moisture content of transformer oil?

For mineral oil, a generally accepted maximum moisture content is 35 ppm. This test does not measure the water content in the transformer paper insulation. New transformer oils contain practically no acids. The acidity test measures the content of acids formed by oxidation and contaminates.