Insulation Resistance Transformer Megger Test Diagram
Measure insulation resistance between low voltage windings and the main body of the transformer.
Insulation resistance transformer megger test diagram. Use the megger test at a low voltage side. Megger insulation resistance test device. Megger makes electrical test equipment to help you install improve efficiency and extend the life of electrical assets and cable networks at high medium and low voltage. The easy to use software interface powerdb minimizes time required to learn how to use the delta4000 and perform these tests correctly.
It also serves as the best guide to indicate the health of the equipment. Insulation resistance test of transformer is divided into three parts. If you fail to maintain your transformer with regular insulation resistance testing as can be carried out by the megger. For good insulation the resistance usually reads in the megohm range.
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. Record the value of insulation resistance measured by megger tester after applying 1 min. Since 80 of electrical maintenance and testing. An insulation test is carried out to test the integrity of the insulation between conductors.
The megger insulation tester is a small portable instrument that gives you a direct reading of insulation resistance in ohms or megohms. The megger insulation tester is essentially a high range resistance meter ohmmeter with a built in direct current generator. Hands down without a doubt one of the most universally searched topics on ec m s website from a historical perspective is insulation resistance testing as a result some of our most popular evergreen articles like understanding insulation resistance testing continue to top the charts when it comes to most popular content. Apply the test voltage and note the reading.
Adjust megger tester at 1000 v dc. Importance of insulation resistance test or megger test. Value at 60 seconds after application of the test voltage is referred to as the insulation resistance of the transformer at the test temperature. A failing transformer is a costly replacement in an electrical system with the potential for a long downtime.
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.
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