Answer / sidharth

An autotransformer doesn't provide electrical isolation between its windings like an ordinary transfomer. hence, the maximum limit for voltage transformation in an autotransformer is 3:1. beyond this value, it is safer to use a 2 winding transformer.

Answer / iftikhar

It is unsafe for stepping down a high voltage to low voltage
in an auto transformer, if an open circuit develops in the
common portion of winding then full primary voltage will
appear across the load which could be dangerous to both the
persons and the equipment.

Answer / dipak

An auto transformer can could fail in such a way as to have
a primary voltage secondary and such condition cause a
damage or injury.

Answer / gourav bapna

autotransformer is a single winding transformer with unity
ratio.that implies a 1:1 ratio which cannot step up voltage
from a low voltage source.

Answer / bhigesh

al type transformers are step up tramsformer.its aim to
decrease voltage at the keys of independent voltage inverter

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