Topic :: Transformer





Transformer Interview Questions
Questions Answers Views Company eMail

How do you add default rules in the transformer?

 655

How to add default rules in the transformer?

 726

Explain the difference between powerplay transformer and power play reports?

 602

Explain difference between powerplay transformer and power play reports?

 545

Explain the difference between isolation transformers and step up or step down transformer?

 606

What is coefficient expansion of transformer oil?

 602

What are potential transformers?

 577

Define potential transformers?

 671

What is potential transformers?

 634

How does frequency affect KVA rating of a transformer? If a 500 kva, 500 to 250 v, 60 hz t/f normally used in Canada is to be operated in Europe on 50 hz frequency then how will its KVA rating change? a-increase b-decrease c-remains same

 1 853

How does frequency affect KVA rating of a transformer? If a 500 kva, 500 to 250 v, 60 hz t/f used in Canada is to be operated on 50 hz in Europe frequency then how will its KVA rating change? a-increase b-decrease c-remains same

 1 974

Draw a SLD for main panel for school having connected load of 1200kw and emergency generator 200kw.also show the increase of additional load of chiller 225kw in the lv panel indicating meter postion size of transformer ,cables and capacitor bank.

 533

a 230v transformer with step down ratio 19:1.it has 2000turns on primary and rated 25va calculate max primary current no of secondary turns volts/turn

 965

why we use single core 630mm2 cable for transformer secondary side

 489

If 22 KV HT line, Current transformer is 25/5 then how to calculate multiplying factor.

 617



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Un-Answered Questions { Transformer }

Difference between PowerPlay transformer and power play reports?

2074

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

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