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Tuition > Learn Tuition > Why hissing sound is produced in the transformer?
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Why hissing sound is produced in the transformer?

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Transformer works on A.C.It gets magnetized in first half of the cycle and demagnetized in second half of the cycle during this laminations of core expand and contract erratically and vibrate this causes humming sound
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Electrical stampings in the core are subjected to magnetic forces during operation and tend to vibrate. Due to ageing the stampings loose covered insulation coating and vibrate due to loosening of stampings/laminations and produce hissing sound.
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It is due to the expansion and contraction of the transformer core laminates due to the magnetic effect of AC current passing through te coils. Its called Magenosrtiction...
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