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For an auto-transformation ratio tending to the unity value, saving of the conductor material will be ___________

For an auto-transformation ratio tending to the unity value, saving of the conductor material will be ___________ Correct Answer Tend towards 90% or more

GTW-Gauto = 1/a’ * GTW = saving of the conductor material using autotransformer. So, if a’=10, saving is only 10% but for a’=1.1, saving is as high as 90%. Hence it is more economical when the turn-ratio is closer to unity.

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