To test Transformer we give HT side 440V to see wheather
that it is producing 17.6V on LT to verify Voltage ratio is
correct or not but when we give the 440V voltage to LT side
then what will happen to HT voltage ?
Answers were Sorted based on User's Feedback
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.
Is This Answer Correct ? | 6 Yes | 0 No |
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.
Is This Answer Correct ? | 2 Yes | 0 No |
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.
Is This Answer Correct ? | 0 Yes | 4 No |
The importance of resonant filters in converters?
what is the difference between current voltage transformer and current transformer and where it is used?
what kind of quetions will ask in BHEL in interview? Plz help me?
how hazordious area is classified at an oil & gas plant and categorise suitable class of electric equipment in that area like induction motors, LCS, Lighting Fixtures Fluerescent/Flood lights Mercury& sodium lights, J.Bs, Power Cables etc
what is the excess air in furnace
best manufacturer for busbar for outdoor switchyard having double bus bar scheme, can any one share technical specification of busbar. 132kv voltage ?
What is the resistance to be connected for supplying the load of 20mV,1kohm from 20mV supply using rectifier.
What is Nominal voltage?
what is the difference between AC choke (inductor) and DC choke (inductor), working and design point of view?
what happens if a carbon brush is touching the top end of the commutator
what material is used in capaciter
i need the details about bhel exam.how to apply for that.please send to my email-id.thenmozhi2k7@gmail.com