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Topic :: Transformer





Transformer Interview Questions
Questions Answers Views Company eMail

Explain the operation of variable frequency transformer?

1182

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

1178

explain different losses in a transformer.

1201

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

1239

What is transformer utilization factor?

1180

What’s the normal transformer current rating?

1081

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

1065

What is the specification of transformer?

1108

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

1084

What is star-delta transformer?

1246

Which type of transformer is used for lighting loads?

1179

Which oil can be used in transformer?

1 1706

Explain the working of variable frequency transformer?

1207

What do you mean by lighting transformer?

1102

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

1305




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Difference between PowerPlay transformer and power play reports?

2557


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

2695


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?

2122


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

2121


Draw the line diagram of diffretial relay connected to transformer?

2487


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

2425


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

4387


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

2041


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

2408


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

2202


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?

1975


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

2018


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

2117


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

1994


what r the checklist while installing 500 kva transformer

2377