Answer / alpha cherian

Transformer Copper loss depends on the current drawn and
Iron loss depends on the Voltage. These are affected by the
load connected to it. While designing it is unpredictable.
Since power factor is not constant "KW" rating will be
wrong. Hence rating in kVA.
Kw rating = kVA rating x Power factor

Answer / blaji

loss of trasformer dependes on voltage and current only,
not the angle between them...

anythink give supply rated on KVA--Alternator-chock-trasfo.
anythink takes power termed in KW-light-bulb,load,,,

at the time of designe we do not know about load PF,that y
Alternator rated in KVA,,

but we knew pf of any motor after designe...so we can add it

Power=V*I*pf....bk_kangaonkar@yahoo.co.in

Answer / satish kumar , g.noida

because transformer not is self load.transformer rating
depend upon type of connecting load
(resistive/indactive/capactive).

Answer / satish kumar

Because transformer is not self load so that Transformer
power factor depend upon which type of connected load such
as Resistive/inductive/capactive load

Answer / divya makkar

because transformer have variable power factor so that it is
rated in kva and motor has constant power factor thats why
it is rated in kw

Answer / roushan.eee

MVA OR KVA; WE USE FOR ELECTRICAL O/P.
MW OR KW; WE USE FOR MECHANICAL O/P.

what is maximum or Threshold value of current 7 voltage that a common man can withstand

1 Answers  

how to read idmt curva

0 Answers  

State the frequency for rc phase shift oscillator?

0 Answers  

I have 725KVA DG set how to Calculate the Ratio of KWH? Whatb is the Formila

7 Answers   HCL,

whatdo mean by chopper fed drives.used for ac drives.

0 Answers  

3ph motor running with unequal kw and different pf what are the reasons

0 Answers   UltraTech,

can we use 220 volt 15 w a.c. lamp on 220 volt d.c.

6 Answers   TCL,

how to calculate the size of cable for 100 kva load,?can somebody tell me with a formula

7 Answers   Apollo,

what kn of disc is used in 33kv,132kv,220kv,400kv,800kv transmission line

0 Answers   Jindal, Power Grid,

How can we have to decided motor connection as a STAR-DELTA or DELTA-STAR?

3 Answers   IOCL, Jindal,

in trains i have seen the terminal which is connected at the top of the train is positive .where is negative ? track? i dont think so

9 Answers  

What is Load sharing of Transformer ?

0 Answers