Topic :: Transformer





Transformer Interview Questions
Questions Answers Views Company eMail

Explain the operation of variable frequency transformer?

678

In a tap changing transformer where is the tap connected, is it connected in the primary side or secondary side?

723

explain different losses in a transformer.

659

Comment on the working principle of operation of a single-phase transformer.

707

What is transformer utilization factor?

647

What’s the normal transformer current rating?

615

What should be the material composition of transformer oil filtration machine to avoid metal contamination in filtered oil?

607

What is the specification of transformer?

610

what is the current rating of both primary and secondary of 500kva,33kv./400v.distribution transformer?

609

What is star-delta transformer?

695

Which type of transformer is used for lighting loads?

716

Which oil can be used in transformer?

1 1001

Explain the working of variable frequency transformer?

660

What do you mean by lighting transformer?

623

What is the normal phase difference between the voltage and the no-load current in a transformer?

694




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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