Insulation Resistance Test Using Megger Of Transformer

The insulation resistance test is of value for future comparison and also for determining if the transformer is to be subjected to the applied voltage test the winding insulation resistance test is a dc high voltage test used to determine the dryness of winding insulation system the test measures the insulation resistance from individual windings to.

Insulation resistance test using megger of transformer.

This guide explains the many types of transformer and the power factor test procedures for each one. Value at 60 seconds after application of the test voltage is referred to as the insulation resistance of the transformer at the test temperature. Power factor testing of power and distribution transformers the transformer is probably one of the most useful electrical devices ever invented. Megger insulation resistance test device.

Record the value of insulation resistance measured by megger tester after applying 1 min. The easy to use software interface powerdb minimizes time required to learn how to use the delta4000 and perform these tests correctly. Megger test equipment help to measure transformer insulation resistance winding resistance sweep frequency response analysis and oltc diagnosis tests enable the assessment and overall health of the transformer to be determined. As can be carried out by the megger transformer ohmmeter mto series of transformer test equipment then it s likely to.

Megger s delta4000 automatically produces the itc for each transformer and provides confidence that the power factor tan δ result is accurately corrected to a 20 c equivalent value. Measure insulation resistance between low voltage windings and the main body of the transformer. The transformer neutral bushing is to be disconnected from earth during the test. Apply the test voltage and note the reading.

Transformer insulation resistance deterioration is one of the most common causes of transformer failure. The megger insulation tester is a small portable instrument that gives you a direct reading of insulation resistance in ohms or megohms. Insulation resistance test of transformer is divided into three parts. Since 80 of electrical maintenance and testing.

Adjust megger tester at 1000 v dc. For good insulation the resistance usually reads in the megohm range. Use the megger test at a low voltage side.