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Topic :: Transformer





Transformer Interview Questions
Questions Answers Views Company eMail

Explain the operation of variable frequency transformer?

1191

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

1197

explain different losses in a transformer.

1215

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

1251

What is transformer utilization factor?

1193

What’s the normal transformer current rating?

1091

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

1071

What is the specification of transformer?

1117

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

1100

What is star-delta transformer?

1256

Which type of transformer is used for lighting loads?

1186

Which oil can be used in transformer?

1 1715

Explain the working of variable frequency transformer?

1219

What do you mean by lighting transformer?

1110

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

1320




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Difference between PowerPlay transformer and power play reports?

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2703


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?

2127


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

2133


Draw the line diagram of diffretial relay connected to transformer?

2500


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

2438


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

4397


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

2049


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

2425


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

2213


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?

1991


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

2027


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

2127


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

2008


what r the checklist while installing 500 kva transformer

2399