Answer / rahul

copper loss depends on current andiron loss depends upon
voltage.hence the total loss in a transformer depends upon
volt-ampere(va) so rating of transformer is given in VA

Answer / murali290

For any device the rating is given based on the losses occur
in it (loss is nothing but heat).In transformer 2 types of
losses occur 1.core losses: which depends on V &
2.cu losses: which depends on I only
but no losses depends on p.f.
therefore trasformer rating proportional to VI or VA
for large transformers the rating in kilo or mega ,hence
KVA or MVA

Answer / praha tuty

Transformer has copper loss & iron loss. copper loss occur
in windings & it is due to emf.Iron loss occur in core due
to current. so in order to measure the both losses,
transformer ratings are in VA rating.

Answer / rakesh maharjan

The KW rating is dependent on the power factor and power factor can be different depending the condition where as mostly 0.8, but if KVA rating is given we can calculate the KW rating as per our condition. So KVA rating is fixed and reliable to any malfunciton not to occur. so the transformer rating is given in KVA.

Answer / pramod attri

it's using step up, and step down at same frequency..by
mutual inductance.. it case transformer calling in kv,,,

Answer / rajeshambur

transformer have a two losses because open circut and short circut . two losses so transformer rating in va

what is static frequency converter?what is the function...of sfc...?

0 Answers   L&T,

Please mention available current rating for MCB,RCCB,MCCB in the market or any website

1 Answers   ETCO,

in catridge heeter  watts =110, 260 v ,  i checked in multimeeter meeter shows 50 ohms but oms law r=v square /w  260*260=67600, and 67600/110=614.5 ohms  how to caluclate exact ohms in heetre s 

2 Answers  

if the back emf eqution for dc motor EB=(QPNZ/60A) THEN what is the value of A for PMDC MOTOR OR how can dicide the value of "A"

2 Answers   BSL,

what will happen if neutal in AC ckt will get open

3 Answers  

what happen if steam turbine trip,g.c.b not open and excitation off and on condition?

1 Answers  

What is Skin effect of the cable?

8 Answers   L&T,

I need the proper answer on :- What is the Earthing Value as per the standard for Raw power and UPS Pit and in panel /DB N-E value ???

2 Answers  

n1 =1000 n2 =?;v1 =200:v2 =400

1 Answers   APGenco,

3 ph motor connected in star delta starter. when we start the motor it run in star but when in is going in delta it trips the main incoming supply. why?

3 Answers   Bajaj Hindusthan,

At what distance power transformer can be placed from generating ?

6 Answers   NTPC,

Disadvantage of leading power factor

3 Answers