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Topic :: Transformer





Transformer Interview Questions
Questions Answers Views Company eMail

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

1995

Why a Transformer Noise during its running condition ??

NTPC, UPPCL,

11 23267

How the Transformer oil testing is done & Why oil dielectric goes LOW & what is solution for that ??

NTPC,

3 12995

What is the formula for calculating Transformer Losses & Efficiency. I want to compare the Transformer efficiency at different loading condition.

Rays Power Experts, Techser,

6 159897

transformer losses

1 5044

In transformers Which type of connection is preferred for harmonics to be minimum. primary : secondary star without neutral:open delta star with neutral :open delta star without neutral: delta star with neutral : delta explain why

Genco,

1 5195

The exciting current of a transformer is non sinusoidal. why?

2 11417

Give the selection criteria of a 3 Phase transformer for industrial purposes ?

NDDB, TATA,

5 12415

I have 11KV/415V power distribution transformer. I have found unbalance current in LT (415V) side. Also observed that unbalance voltage (3V) at LV side due to HV side unbalance voltage. What should I check for this? Also, the same LV side load can run in balance on captive power.

1 5336

Why Delta Star Transformers are used for Lighting Loads.

6 27583

In distribution transformers, fuse wires are very thin when compared to conductor size. How it's possible?

4 11622

Generally transformers has delta primary and star secondary. But in some transformer i saw Star primary and delta secondary. what is the reason for chosing like this?

2 4369

what r the checklist while installing 500 kva transformer

Pepsi,

2377

what happens when a power transformer neutral earthing broken???

MacLellan,

11 23471

When charging a 20 MVA , 33kV/6.6kV transformer through regulated (0-6.6 kV or 0-33 kV) source on no load , what will be the maximum current drawn by transformer from source and what sould be the source capacity.

TATA,

5 11878




Related Topics


Un-Answered Questions { Transformer }

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.

2122


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

2409


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?

1995


what r the checklist while installing 500 kva transformer

2377