Answer / fredrick

Due to the input voltage,an emf is induced across the primary winding.Due to this alternating emf produced,there is flux flow across the core,around which primary and secondary windings are wound.when the flux produced by the pw links the secondary winding,the secondary winding doesn't allow the sudden increase or decrease in fux across it(basic working of an inductor coil).As a result secondary coil induces an opposing emf across it,which opposes the flux of primary winding.since it is an opposing emf induced,the emf's induced across the primary and secondary must have opposite signs and there should be 180deg phase shift b/w primary and secondary.

Answer / asmi

When suppply is given to primary side(Let it be V)
flux is generated ,this flux generates vtg in primary
winding(E)(like back emf in motor).As per Lenz's law these
vtges are opposite to each other (180 degrees phase shifted)
hence,there is a phase shift in Iry n IIry vtges of T/F

Answer / ajith nair

The question is what is the main reason for phase
displacement is it the air gap/flux density or what is that
paramaeter?
so If the phase displacement is 180 degree then how the
phase angle becomes 30 degree when we use Dyn11
transformer.How do we make that?
thanks

Answer / johnathan

When a potential difference is applied across the input terminals of an ideal transformer, an emf is induced in the primary coil. The flux generated in the primary coil due to this emf links through the iron core to the secondary coil. The flux in the iron core is in phase with the current in the primary coil. When the secondary coil cuts the flux linking through the core, an emf is induced in the secondary coil. This emf is proportional to the RATE OF CHANGE OF MAGNETIC FLUX LINKAGE, and the flux and the rate of change of flux linkage are not in phase. Consequently, there is a phase angle between the emf induced in the secondary coil and the emf in the primary coil.

Answer / asghar

W
When some input is applied on primary side of transformer
it takes some time to produce magnetic field then magnetic
field to electrial field on secondary side. So this is the
reason of phase shift between inpt and output of
transformer.

Answer / gunasekaran

if their is no phase displcement b/w primary and secondary
because primary emf is 180 deg out of phase and secondary
also another 180 deg phase shift it is 360deg so no phase
displacement

Answer / suresh

the main reason for phase shift is flux,because of some
leakage magnetude is dec.and also phase shift is prodused

How would you relate your key competencies to this position?

0 Answers  

what the good value of earth resistance test

3 Answers  

What is four quadrant metering system.

5 Answers  

My load is 1635 KW. & current pf is 0.884, I have to improve it for 0.99.Please suggest what KVAR value is needed?

0 Answers  

Which type of questions well asked. ?

0 Answers  

how to measure the voltage drop in cables also give formulas to calculate.

3 Answers   Cable Wireless,

Which phase is prefered for connecting 1phase vt used for synchronism in an OHL? why?

1 Answers   Siemens,

what is difference between ELCB, RCBO & MCB

2 Answers  

Sir, I need a power supply at 380V. The supply I get in three phase is rated 415V. The total supply I have from the supply company is 70KW. Kindly inform if it is better to use a voltage stabiliser for this purpose or a transformer

3 Answers  

whats the differece between Exd and Exe

0 Answers   IFFCO, TN,

What happen if in three phase 440 v , when you check voltage by testor it glows except one phase and in the same time when you check by multimeter it shows 440 v in any two phase.what will be the reason...

1 Answers   Greatship,

Can we loop AC neutral wire with DC neutral wire?

5 Answers   ABB,