Ask a Question
Spacers are provided between adjacent coils?
Mar 19, 2018
to add a comment.
← Prev Question
Next Question →
to answer this question.
Spacers are provided between adjacent coils
to provide free passage to the cooling oil.
Mar 19, 2018
to add a comment.
In a transformer the tappings are generally provided on?
Helical coils can be used on?
In a transformer the resistance between its primary and secondary should be?
The transformer ratings are usually expressed in terms of?
During short circuit test iron losses are negligible because?
The transformer laminations are insulated from each other by?
Reduction in core losses and increase in permeability are obtained with transformer employing?
In a power or distribution transformer about 10 percent end turns are heavily insulated?
In a given transformer for a given applied voltage, losses which remain constant irrespective of load changes are?
Explain the effect of Harmonics on the Transformer.
List two special feature of welding transformer.
State two applications of isolation transformer
State why a transformer always have an efficiency of more than 90%.
Equivalent circuit of transformer
Single phase transformer
What is the use of transformer?
Transformer on DC
Even at no-load, a transformer draws current from the mains. Why?
State and justify which of the following two transformers is better: Transformer A = 4% voltage regulation Transformer B = 6% voltage regulation
State any four characteristics of core type transformer.
Explain construction and working of single phase Auto transformer.
No-load current in a transformer?
The purpose of providing an iron core in a transformer is to?
In the transformer which winding has got more cross-sectional area?
A transformer cannot raise or lower the voltage of a D.C. supply because?
Primary winding of a transformer?
Which winding in a transformer has more number of turns ?
Efficiency of a power transformer is of the order of?
The no load current in a transformer lags behind the applied voltage by an angle of about?
In a transformer routine efficiency depends upon?
The maximum efficiency of a distribution transformer is?
Transformer breaths in when?
No-load current of a transformer has?
Greater the secondary leakage flux?
The purpose of providing iron core in a step-up transformer is?
The power transformer is a constant?
The use of higher flux density in the transformer design?
The chemical used in breather for transformer should have the quality of?
The chemical used in breather is?
An ideal transformer has infinite values of primary and secondary inductances. The statement is?
Material used for construction of transformer core is usually?
The thickness of laminations used in a transformer is usually?
The function of conservator in a transformer is?
A transformer oil must be free from?
Gas is usually not liberated due to dissociation of transformer oil unless the oil temperature exceeds?
The main reason for generation of harmonics in a transformer could be?
Star/star transformers work satisfactorily when?
Delta/star transformer works satisfactorily when?
The magnetising current of a transformer is usually small because it has?
The leakage flux in a transformer depends upon?