Answer / k.prakashchandra

The output of motor is mechanical power, denoted in both hp
and equivalent KW ,whereas output of Tr is AC electrical
and actual power is KVA x PF .

Answer / r.v.giribabu

rating of the any equipment is specified depending upon the
usage.

since motor is mechanical device which delivers the
mechanical output, so the amount of Mechanical output to be
specified. further, Voltage, PF also specified for
identifying suitability of installation of the motor and
efficiency for effectiveness of the motor.

In Transformers, Output and Input is Purely KVA. losses,
capacity of tranformer only depends on KVA and Voltage . KW
change or PF change will not effect the losses and capacity
where it is installed.

thats why the motor is rated as kw& transformer as kva.

Answer / k.prakashchandra

Transformer gives AC electrical output and the current is
proportional to KVA.With motor we get mechanical output and
should be in HP only.But the HP is converted into KW to get
electrical details

Answer / nilkanth tailor

Transformer and genrator PF depends on the nature of
connected load ( Motor ), But motor has its own fixed Power
factor

Therefore Transformer and genrator capacity shown in KVA
and motor Capacity shows in KW........SO...if we want to
measure PF in GEN and TRAN...we require current and voltage
rating...so thier is in KVA....

but motor PF is constant so thier is no need to indiacte in
kva....so.......

Answer / r.v.giribabu

To select a rating of any equipment, Output and Input
capacity is taken as a base point.

In a motor or any other electrical equipments, conductor
size is depend on current flowing through the conductor.

size of the core (Rotor and Stator or core of a
transformer) depends on voltage as flux induced in any AC
Machine is directly proprotional to Voltage/Frequency ratio.

Which culminates to Size of equipment directly depends on
Input/Output Voltage and Current of machine. that is why
rating is mentioned as Volatage X Current i.e. KVA.

Shortly, Size of machine is directly proportinal to KVA
ratring. that is why all the electro-magnetic machines are
rated in KVA.

Answer / subhajit

Power output of a motor depends upon the power factor . If
power factor is less it will affect the power consumption of
the motor from the supply mains.

Whereas in case of transformer, its output does not depend
upon power factor. So it is always rated in kva not kw.

Answer / bhuvnesh wadhwa

Transformer use step up or down the energy but not be use as
a load.
In case of motor work like a load

sir what is the minimum IR value of 11 KV alternator?

4 Answers   Kirloskar,

In DC generator, we use commutator, having no. of segments. Then how it is possible to get a half wave of voltage and current for half rotation of armature?

0 Answers  

Which oil is used in Transformer?

6 Answers  

In case of 11kV dual delta bank what are the recommended protections with specific CT / VT requirements? The capacitor bank is to be connected to the main 11kV switchgear from where the H.V.Motors and auxiliary 440V loads.

1 Answers  

As we know that during saturation test of CT from secondary side, the current in secondary shoots up after core saturation. How core saturation effects the secondary current?

2 Answers  

Why selected cable colour red yellow and blue in 3 phase Electrical system?

9 Answers   Crompton Greaves, Essar, Gridco,

if acapacitor connected to power supply will it cosume power& will it going to get recorded in energy meter

2 Answers  

what is the diffrence between dol and star delta strater? why star delta starter used instead of dol?

3 Answers  

To avoid arcing what we connect in earthing.

4 Answers   HAL,

what do you mean by linear and bilateral network?

2 Answers  

why can tv operate at low voltage??

2 Answers  

List examples of voltage source?

0 Answers