Topic :: Transformer





Transformer Interview Questions
Questions Answers Views Company eMail

What do you mean by turns ratio of instrument transformer?

629

What are the types of transformers according to the arrangement of iron cores?

618

Which material is used for the core of a transformer and why?

609

What is the use of iron core in a transformer?

649

How does a transformer contribute towards the widespread popularity of ac system over dc?

652

What are the advantages of instrument transformer?

639

What is the permissible maximum flux density in transformer core?

734

What do you mean by transformation ratio of instrument transformer?

636

What is the power factor of a transformer at no load?

666

What is the phase relationship between the primary and secondary voltages of a transformer?

592

What do you mean by nominal ratio of instrument transformer?

1 3685

The size and construction of bushings in a transformer depend upon?

1195

What do you mean by a phase angel of instrument transformer?

644

What is voltage ratio of a transformer?

641

Why is the frequency not changed during transformation of electrical energy in a transformer?

853




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2118


If one tertiary phase i.e. R,Y or B is earthed of a loaded type tertiary delta connected (Without load)of a power auto transformer, what is its advantage/disadvantage?

1617


what is R Core Transformer. how it differs from normal transformers. dont search in net and post the answer.

1611


Draw the line diagram of diffretial relay connected to transformer?

1971






How to select the earthing transformer,for DELTA TO DELTA TRANSFORMER OR ALTERNATOR SIDE.Pls post your answers and calculation.

1872


Why Transformer Neutral having one earth pit ( more earth electrode resistance) whereas body have many earth pit ( less earth electrode resistance)?

3849


how we arrange the hv side with delta connection in case 33/11kv of transformer.

1550


what is the criterion for selecting vector group of Transformers ? i mean how to decide vector group of Generator transformer, substation trasformer and transformer at consumer end

1769


i need the curve duty cycle and amper for (150 kva @50% dyty cycle) transformer turn ratio :19 and vin 400

1628


what is the effect of connecting three phase supply lines to three phase auto transformer output terminals through a fuse of 10Amp and a circuit breaker (MCB). Is this connection permanently destroy the transformer?

1475


How is the percentage impedence of a transformer fixed at design stage???

1506


How a capacitor discharge weld power supply works? what is the use of a pulse transformer?

1581


what is a pulse transformer? how rise time of pulse changes when ever the voltage changes?

1490


what r the checklist while installing 500 kva transformer

1811