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Topic :: Transformer





Transformer Interview Questions
Questions Answers Views Company eMail

Can a 150 kva 3 phase,440v/230v delta-wye connection stepdown transformer can be used in reverse as a step up tranformer ?

Meralco,

3 4513

As per standard, transformer body earthing and other Equipment earthing (Equipment earthing) did not connect. but in LT side termination we are doing metal glanding in both side Transformer to PCC Panel through armoured cable, now X'mer body earthing and PCC Pane earthing (Equipment earthing) both are connect.is this safe for X'mer or other equipment?

1774

Assuming that a dedicated neutral earthing transformer is provided for each GT generator, when the two generators are running in parallel, has consideration been given that the earth fault current from one generator stator winding be split between the two neutral earthing transformers? If so, what adverse impact will this have on the operation of the 59N and 27TN devices?

Quest,

1666

Isolation transformer primary to sec turns ratio?

2 4091

what id a dry type transformers and its function ?

Wipro,

1772

i need to now what will be the cable size to the following load, transformer to distribution panel distance 110m, load 1000kw, voltage 400v, pf 0.85, permissible voltage drop 2.0%, overhead line, atmospheric temperature 35 degree c.

Bay Fishing Corporation,

1628

What is the function of neutral CT in transformer? Turn ratio of typical CT for 2MVA transformer ? or relation between full load current of transformer and neutral CT ?

Electrical Inspectorate,

1 2907

In which iron losses is higher induction motor /transformer

1 2705

Could explain briefly of over excitation in transformer.

NCC,

2 3986

why transformer neutral and CT Secondary neutral is connected to earth?

NCC,

3 4684

what should be the recommended BDV of an oil transformer???

1618

what is PDU in transformer?? which company manufacture??

1909

can we use the 110 v primary Tr 240 v secondary step up Transformer as reverse 240 pri 110 sec

Hyundai,

3 4344

Why lose 1 phase voltage in 33kv to 415v stepdown transformer

1744

How can step up and step down process in power transformer

MSETCL Maharashtra State Electricity Transmission Co Ltd,

1 2657




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Un-Answered Questions { Transformer }

Difference between PowerPlay transformer and power play reports?

2524


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

2658


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?

2090


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

2101


Draw the line diagram of diffretial relay connected to transformer?

2442


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

2381


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

4334


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

2003


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

2363


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

2137


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?

1935


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

1986


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

2085


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

1961


what r the checklist while installing 500 kva transformer

2331