Answer / rabindra kumar

because motor gives mechanical power as output, where as transformer
n alternator give electrical power as output.

Answer / sanju

All depend on power factor.

Answer / jagu

Transformer is independent of pf.Hence the transformer rating is always expressed in KVA.
In Motor the pf is dependent on percentage loading & hence expressed in KW.

Answer / brd ganesh

All ac sources are rated in kva where alternator
&transformer and all ac loads are rated in kw
where motor

Answer / ritika

motor manufacture ki marji.
alternator manufacture ki marji.

Answer / prasanna

becoz iron losses depends on voltage and copperlosses depends on current.....so the motor rating is in KVA

Is it necessary to place tap changer in secondary winding or we can use on both sides?

3 Answers  

kindly tell me how the load on generator increase by just increasing the fuel of prime mover, as if for exampple 20 MW gen set is synchronized the load ramps from zero to 20 MW gradully and during this procress only fuel of prime mover increases. Which thing determines the load on generator with respect to fuel

4 Answers   Birla,

What will be the fault current of any system when its generation is 10% of BASE generation( FUll Load )?Will is 10% or the same as full base calculation?

0 Answers  

DG SET BLOCK DIGRAM

0 Answers   L&T,

A 100KVA SINGLE PHASE TRANSFORMER 10000/200V,50HZ REQUIRES 300V AT HV SIDE TO CIRCULATE FULL LOAD CURRENT WITH LV SHORT CIRCUITED.THE INTAKE IS 1000W.THE % OF REGULATION ON FULL LOAD AT 0.8 PF LAGGING WILL BE HOW MUCH AND THE SECONDARY TERMINAL VOLTAGE ON 0.8 PF LEADING WILL BE

0 Answers   IAS, TATA,

As we know multiplicity factor derivation equation is as below MF = main c t ratio / main p t ratio * meter c t ratio / meter p t ratio * meter dial constant Where in digital meters for HT kwh import export now a days meter constant are calibrated already which is 1 So my question is For HT 11kv 110 v line values are as below Main c t and p t ratio are 11000 v and 110 v and 20/5 means 20 amp and 5 amp Now meter values are 11000/√3/110√3 and primary and secondary amp are displayed as -/5 amp on kwh meter so what will be the MF for this meter ?

1 Answers   NEPC,

What is I/P converter?

1 Answers   RRDonnelley,

What will Happened if the polarity of CT is changed?

13 Answers  

what is trip circuit supervision relay? How does it work in switchgear?

6 Answers   Radha Regent Hotels,

what is the voltage between nutral and earth?

2 Answers  

which oil is used in transformer?

7 Answers  

Types of 132KV and 222 KV protection.

1 Answers