Answer / ranjeet

transformers are rated in kva because copper loss is due to current and iron loss is due to voltage so it is expressed in va and power factor is not know

Answer / jayesh pillai

the load on generator or transformer is not known so its
power factor is also unknown
moreover active losses occuring in transformer is very low

due to these reasons generator or transformer are having
rating in kva and motor is in kw

Answer / k.sri405

generator is a power source so the load of generator is not
known it may either inductive or resistive or capacitive.
and power factor depends on load so it is rated in kva. but
motor itself is a load so it is rated in kw.

Answer / vamsi

trf having two losses 1.copper losses depends on current and iron losses depends on voltage.so trf having unknow power factor.it depends on nature of the load i.e restive,inductive and capacitive load bt motor having fixed power factor and its doesnt depends on load.

Answer / sumit kumar

In the case of t/f eddy current loss and hysterisis loss due to current so, the rating of t/f is in kva but in case of motor loss is i^2*r so,rating in kw.

Answer / qwde

Aternator's & Xmer's power factor depend on threir loads.
So that u can not calculate KW rating at the time of
manufacturing.

Answer / shareef

The simple answers are
1- Motor & Loads devices specify by KW
2- Generator, transformer, OHTL, UGC...ect (any devices
used to transfer, improve or generate the power is
specified by KVA)

i have total 8 dg sets for synchronizing and 2 buscoupler,1 sectoin dg no 1,2,3,and 2 sectoin dg no 4,5,6,and last section dg no 7,8 ....if buscupler no 1 and 2 is off mode ..than dg no 1,2,3,will synchroniz of another dg sets?

0 Answers   Crown Buildtech,

why we use choke in tubelights nad other lighting fixer

1 Answers  

what will happen if the frequency supplied is more than the frequency of the instrument...?

3 Answers  

Why we specify TNC switch with 1NO 1NC ,2NO 2NC ? how we get connection.?

0 Answers  

Why star pointed terminal have no current? how?

3 Answers  

If you know per phase current and phase to phase voltage; what is overall KW of the circuit?

1 Answers   ABC, GAS,

if the load is reactive then what is the use of calculating the real power and what is the use of reactive power if my question is wrong please excuse me..

1 Answers  

In dc ckt. 24v or 110v, which one is more efficient and why?

0 Answers  

what happens when power factor leads or lags to electical or home appliances

2 Answers  

how to commissioning the genset with amf panel?

0 Answers   Cummins,

How could I get a certificate of competency as Electrical Supervisor? I have completed By BTech in Electrical this year(2012) for VJTI Mumbai Maharashtra. Is it compulsory to be produced while joining?

0 Answers   ONGC,

Yazaki india pvt ltd interview questions qurey related

0 Answers