Answer / manohar mishra

For ratio test, only the change in voltage is to be measureD. If 440 V is fed to LV, HV voltage will go to a HIGH VALUE (11kV) making it difficult to measure. Blowing of fuses do not occur as there is no flow of current.

Answer / nithi

For ratio-test,the second answer may be correct.
But at the same time,if we apply high voltage in LV
side (in ratio-test also)for a longer period (in seconds),
LV winding cannot withstand, result in insulation break-
down,blown-out of fuses.
generally ratio-test is conducted with the
specified (allowable) voltage magnitude.so,practically this
much of voltage is not applied for LV side.I hope,this
answer will be correct.

Answer / nithi

Nothing will happen.Simply,fuse will blown-off.

REASON: LV windings normally have low resistance (fatty
winding) compared to HV side.so, at the moment of
application of high voltage the fuse will sacrifice itself
to pretect the transformer LV windings.

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