Answer / mahavir jagdev

Because you don't know what power factor the generator will be loaded with. The KVA denotes the Voltage and the Current the generator can take at resistive load.

Answer / raul

the designs and ratings of electric machines such as
alternators, transformers etc are always decided by the
amount of losses taking place in d machines i.e. core loss
and copper loss. since the core loss depends upon the
applied voltage and copper loss depends upon d load
current, therefore the product of these dependent variables
i.e. voltage and current i.e. KVA is the acutal ratings.

Answer / at

Not only generator but UPS / Transformer or any other
device which is giving Electrical power as output is rated
in kVA. The reason is that it is power that will be given
by the machine apperently. however when the load is
connected say for example a motor the actual power which is
converted to work is diffenrent known as active power and
involves power factor. There fore all machines with
mechnical output are rated in kw.

Answer / s a s i

rating means max capability of sym.it will obtain from
nether voltage nor curent with resistance known facor.but
kw not provides voltage r current.it gives only wattage
only.so it will rated in kva..

Answer / amit kumar

due to two losses iron loss and copper loss.iron losss
measured in volt where as copper loss is measured in
current.

Answer / sunil

ac generator or any ac machine have two powers real and
reactive power. va or kva is the apparent power of the
machine which is near to the real power and best describes
the capacity.

Answer / murari.soma sekhar

THE RATING OF ANY MACHINE IS DEPEND ON LOSSES DISUPATION OF
THAT MACHINE.SO IN CASE INCASE OF ELECTRICAL MACHINE THE
LOSEES ARE COPPER LOSES @IRON LOSSES BOTH RESULT IN
DISUPATION OF HEAT .HENCE THE CU LOSS DEPEND ON CURRENT
@IRON LOSS DEPEND ON VOLTAGE.SO THAT PRODUCT GIVES RATING
OF MACHINE.

excitation limit of an excitor

0 Answers  

what is rotatng magnetic field in case of three or multiple phase alternating current machines???

1 Answers   NHPC,

Explain the construction of the conservator, operation and purpose, and draw the diagram of the conservator.

0 Answers   Siemens,

What is transformer tap changers please explain

3 Answers   Feedback Venture, Sail,

What is different between resistance grounding system and resistance earthing system?

0 Answers  

How does the phase sequence controller works, how it identifies the phases? confirm working principle

0 Answers  

ARE YOU NOURVAS ?

4 Answers  

Why the Transformer connection is changing in different transformer?(Like Star & Delta,Delta & Delta,Star & Star,Delta Star) From that connection where it is used?

2 Answers  

what is interpose? where it is used and why it is used?

0 Answers  

How turns ratio test is done in three phase transformers?

2 Answers  

in india are trains run by DC or AC? if DC , from where it receives negative potential? because pentograph receives singe potential only?

2 Answers   GATE, PSU,

what is the difference between current rating and breaking current of an MCCB? and for a known load how to calculate the current rating of a MCCB?

1 Answers   HPL,