Answer / chandan kumar

hysterisis losses increases bcoz high grade steel is solenly
used in core material to reduce hysterisis losses while
laminated core is used to reduce eddy current losses.and
copper losses occur due to resistences of primary and
secondary windings....

Answer / somu0507

The main purpose of iron core is to provide low reluctance path.The copper has much lower permeability(approximately equal to 1) than iron and has comparatively higher conductivity. The following effects will occur if copper is used instead of Iron (for same supply of voltage and frequency):
1-It can be seen from voltage equation of the transformer that if supply voltage and frequency is constant then require flux is constant. to produce same flux, very high magnatising current will be required (as copper has very high reluctance than iron) which will result in VERY HIGH COPPER LOSSES in primary winding. Consequently the primary winding may get burn.
2- As the copper has higher conductivity HIGHER EDDY CURRENT LOSSES will occur.
2- Being a non magnetic material, Copper has very narrow Hysteresis loop, hence HYSTERESIS LOSSES WILL BE LESS.

Answer / anil kumar

the main purpose of core is to proviod low resis path .to that steel is used. if we use copper,hence large amont of eddy currets will produce causes short circuit.hence eddy loss plays main role.

Answer / saikrishna

if transformer core is made up of copper the conductivity of
copper will be more and hence eddy currents will flow
through core therefore eddy current losses will increases.

Answer / mangal singh

copper losses..........

how can u say about the line by looking at the tower ? {voltage rating of the line}

3 Answers   BARC, London,

What are the necessary components of the feedback control system?

0 Answers  

what is the use of reactive power

3 Answers  

How to calculate incomer of a capacitor bank/feeder from its KVAR, AND how to calculate the copper busbar for rated incomer,like for 400A we calculate the 40x10 of aluminum busbar.

1 Answers  

In a 11kv/433v transformer,at the LT side ie 433 V side why do we need to put 3.5 core Cable upto Panel.The full load rated Amps is 666 at LV side.What value of current will flow through the Nuetral Conductor.Why can't we use 4Core Cable instea of that?

2 Answers  

Please explain open transition and closed transistion system in Star delta Starter?and also the state difference of both?

4 Answers  

There is any especial requirement for motor to drive through with VFD?

0 Answers  

What should be the magnetic balance test values for a 3 phase delta/star connected single primary dual secondary winding transformer (90 MVA / 2 X 45 MVA TRANSFORMER)

0 Answers  

why 3phase is 440v but where as we get phase voltage 220v,we have to get 220*3=660v.can u pleas give in detailed

3 Answers   Avantha Group,

in transformer star connection with neutral are shorted. is there is any effect.

1 Answers  

Can any body describe me why a soft starter is used for 6.6kv induction motor instead of VFD ?

1 Answers   Cairn,

What is the difference between EXE and EXD

1 Answers