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Q: What is disadvantage of Back to Back test?
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What is the use of back to back test in transformer?

Back to back test give data for finding the regulation , efficiency and heating under load condition. Back to back test is performed in the presence of two identical transformer. In this test one transformer remains open and other remains loaded. Hence sumpner's back to back test is generalised form of o/c test and s/c test which is performed within one test only. Hence from this test we find core loss and full load copper loss simultaneously at a time.


Procedure for sumpners test?

Procedure for sumpners test is the single phase transformer. This is a back to back test.


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What is the use of sumpner's test in transformer?

this test helps in finding the core losses and copper losses in single test , it is also called as back to back test or heat run test .


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