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Topic :: Transformer





Transformer Interview Questions
Questions Answers Views Company eMail

Explain the operation of variable frequency transformer?

1138

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

1138

explain different losses in a transformer.

1129

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

1199

What is transformer utilization factor?

1141

What’s the normal transformer current rating?

1040

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

1012

What is the specification of transformer?

1052

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

1038

What is star-delta transformer?

1196

Which type of transformer is used for lighting loads?

1136

Which oil can be used in transformer?

1 1648

Explain the working of variable frequency transformer?

1153

What do you mean by lighting transformer?

1056

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

1249




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Un-Answered Questions { Transformer }

Difference between PowerPlay transformer and power play reports?

2517


All tape of electrical questions Answers tape of motor transformer e.o.t crane

2657


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?

2082


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

2092


Draw the line diagram of diffretial relay connected to transformer?

2438


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

2376


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

4323


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

1997


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

2354


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

2134


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?

1927


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

1978


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

2078


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

1953


what r the checklist while installing 500 kva transformer

2330